bing tracking image
  1. Brake Actuator
  2. Hydrastar
  3. Electric-Hydraulic Brake Actuator
  4. Disc Brakes
  5. 1600 psi
Hydrastar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi

Hydrastar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi

Item # HBA16
Our Price: $965.64
Brake Actuator
Shipping Weight: 12 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Anodized aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Vented end plate releases heat. Hydraulic lines and breakaway sold separately. 1-800-940-8924 to order Hydrastar brake actuator part number HBA16 or order online at Free expert support on all Hydrastar products. Great prices and Fastest Shipping for Hydrastar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (153)
  • Q & A (0)
  • Photos

Hydrastar Brake Actuator - HBA16

  • Electric-Hydraulic Brake Actuator
  • Disc Brakes
  • Hydrastar
  • 1600 psi

Anodized aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Vented end plate releases heat. Hydraulic lines and breakaway sold separately.


  • Electric-over-hydraulic brake actuator activates your trailer's hydraulic brakes when you apply the brakes in your tow vehicle
    • Brake controller (sold separately) is required to send signal from tow vehicle to actuator when brakes are applied
    • 7-Way trailer connector (sold separately) is needed to transmit signal from brake controller
  • Improved functionality when compared with surge brake couplers
    • Faster response time - trailer brakes are triggered when you apply brakes in tow vehicle, as opposed to when trailer pushes against hitch ball
    • No need to manually lock out brakes when you back up
    • Trailer brakes can be intentionally activated when you reverse
    • Manual override on brake controller can be activated so you can engage the trailer brakes without having to apply your vehicle brakes
  • Vented end plate releases pressure, moisture, and heat in order to protect the internal components
    • Allows actuator to be mounted in places where most actuators would overheat
  • Electronic, proportional pressure valve ensures that braking is smooth and effective
  • Built-in bleeder screw lets you easily flush air out of the brake lines
  • Durable extruded aluminum provides corrosion resistance
  • Compatible with any standard, 5-amp-hour-battery breakaway kit (sold separately)
  • DOT compliant
  • Unit installs on trailer frame and connects to trailer's wiring and hydraulic brake lines (sold separately)
    • Mounting hardware not included
  • Made in the USA


  • Application: single-, tandem-, or triple-axle trailers with disc brakes
  • Maximum output pressure: 1,600 psi
  • Power: 12V DC
  • Hydraulic port size: 3/16"
  • Dimensions: 11-3/4" long x 3" wide x 7-3/8" tall
  • Wire configuration:
    • Black: 12-volt power
    • Blue: brake controller
    • Yellow: breakaway
    • White: ground
  • 2-Year limited warranty

Note: Do not power wash the Hydrastar actuator or take it through a commercial car wash. High-pressure water may damage the seals on the actuator.

The Hydrastar electric-over-hydraulic trailer brake actuator applies pressure to your trailer's hydraulic brake system in response to the electrical signals sent from your in-cab brake controller. As a result, your trailer's hydraulic brakes will be activated every time you apply the brakes in your vehicle or press the manual override on your controller.

Pair the Hydrastar electric-over-hydraulic actuator with your trailer's disc brakes to get the best possible braking setup. With disc brakes, you already have more consistent braking at higher speeds and a shorter stopping distance than you'd get with drum brakes. In addition to more reliable braking, you also have less cost to maintain the brakes as there are fewer moving parts. Combine these benefits with an electric brake controller and you'll get greater control over your already superior brakes, providing you with the best braking performance.

Hydrastar Electric-Over-Hydraulic Actuator vs. Standard Surge Brake Actuators

With the Hydrastar electric-over-hydraulic actuator, you can get all the benefits of towing with an electric brake controller while using hydraulic brakes. Because this actuator will activate according to the settings you have chosen for your brake controller (sold separately), you will have more control over when and how your trailer brakes engage. Depending on the features of your brake controller, you may be able to control both the rate and intensity with which your trailer's brakes activate. You can also use the manual override on your brake controller, which allows you to engage the trailer brakes without having to apply the brakes in your vehicle. And perhaps most impressive, if you have a proportional brake controller, your brakes will be activated with an intensity that matches the braking speed and power of your rig.

This pump-and-motor-based system increases response time compared with traditional actuators because the trailer brakes are triggered when you apply the brakes in the tow vehicle, as opposed to when the trailer pushes against the hitch ball. This not only gives you faster, more efficient braking, but it also eliminates the pushing sensation that occurs in setups that use standard surge brake actuators.

Hydrastar actuators are also beneficial because, unlike standard surge couplers, they allow you to activate your brakes when reversing down an incline, such as a boat ramp. Having the ability to brake in reverse gives you more control and prevents wear on your tow vehicle.

Hydrastar Installation

Hydrastar Installation Diagram

This Hydrastar electric-over-hydraulic brake actuator will give you years of trailer-stopping performance. The actuator mounts on your trailer's frame with the included hardware. Then it splices into the trailer's wiring and connects to your hydraulic brake lines from the 3/16" female port. Lines and fittings are sold separately.

Durable Construction

Just like other Hydrastar electric-over-hydraulic actuator models, this system is built of extruded anodized aluminum for excellent corrosion resistance. In addition, the weathertight seals protect internal components from the elements.

This actuator also has a vented end plate that releases pressure, moisture, and heat to help prevent any internal damage. Unlike models that are unable to release heat and pressure, this vented actuator can be safely mounted inside of a compartment on your trailer. As a result, this actuator is great for gooseneck and fifth-wheel trailers where finding space on the tongue can be nearly impossible.

Brake Controller Compatibility

Not all electric trailer brake controllers will work with this electric-over-hydraulic brake actuator. See the following table to determine compatibility with common models of brake controllers. For best performance, it is recommended that you use an aftermarket electric brake controller rather than an OEM factory-installed controller.

ManufacturerVehicle Years/Controller ModelsCompatibleCompatible if Used with HBA-CAM
Brake ControllersDraw-TiteActivator (5100)Yes
Activator II (5500 or 5510)Yes
Activator III (5520)Yes
Activator IV (5504)Yes
HayesEnergize III (81741B)Yes
Energize III+ (HA81742B)Yes
Energize XPC (HA81745)Yes
Engage (HA81760)Yes
G2 Brake Boss (81792BB)Yes
Syncronizer (HA81725)Yes
Endeavor (81770)Yes
Genesis (HA81790)Yes
Blackbird (HA81726)Yes
HopkinsImpulse Digital (47325)Yes
Insight (HM47297)Yes
Brake Force (47225)No
Reliance (47284)No
Agility (47294 or 47295)No
MaxbrakeBrake ControllerYes
RedlineRedline TA900Yes
TekonshaProdigy (90185)Yes
Prodigy P2 (90885)Yes
Prodigy P3 (90195)Yes
Primus IQ (TK90160)No
PowerTrac (39523)Yes
Voyager (39510 or 9030)Yes
ValleyVA32812 BlackbirdYes
VA32811 PhantomYes

HBA-16 Cargo Towing Solutions (formerly Carlisle) Hydra Star Electric-Over-Hydraulic (EOH) Brake Actuator

Replaces V381-7067

Customer Satisfaction Score:

Customer Reviews

Hydrastar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi - HBA16

Average Customer Rating:  4.8 out of 5 stars   (153 Customer Reviews)

Anodized aluminum electric-hydraulic actuator lets you use your brake controller (sold separately) to activate your trailer's hydraulic disc brakes. Vented end plate releases heat. Hydraulic lines and breakaway sold separately.


Ordered the HBA16 to install on 2013 Dutchmen Rubicon 2900 TH with 7K Lippert axles, feeding the Kodiak Disc Brakes also purchased from etrailer. Unit was received with out any problems, installed and worked as advertised. The only real issue I had was prior to the order finding out for sure if this Actuator would work on my 2014 F-350 with or without the HBA-CAM. Once I received the HBA-16 the documents that came with it from Cargo Towing solutions provided me with another resource to verify what my truck would need. I contacted Nick Ruehlman with Cargo Towing Solutions and he assured me the HBA16 would work on 2014 F-350's with built in controller without the HBA-CAM. Installation was done by a brake tech and went in without any problems. etrailer customer support was very helpful in completing this project. Brakes are outstanding now that the electric's disc's are out.



The HBA16 is still performing well after 5K miles. Great product.


I've been using this brake controller with a disc brake conversion I got from Kodiak Trailer Brakes for about a year and the results have been fantastic. Prior to doing the disk conversion, I'd been through about 3 sets of the old electric drum brakes on my 18,000 lb. dual axle toy hauler and I'll never use drums again.

The stopping distance is noticeably shorter and I anticipate the maintenance to be super simple since they are discs. The electric controller takes some getting used to since there's about a 1-1.5 second delay between hitting the pedal and the brakes engaging. That can be a little unnerving until you get used to the fact that when the brakes come on, the REALLY come on.

After owning my toy hauler for ~10 years, this is easily the most important modification I've done. I will be stripping off brand new drum brakes on my next trailer and replacing them with discs before even the first trip.


Couldn't be happier with this brake system along with my Kodiak disc brakes. System works perfect.



Love love this brake system, going to put one on my other trailer I’m restoring.


The HydraStar unit worked fine, easy to install and hook up.
I hauled several 10 ton loads of hay with no problems, after replacing a brake controller that was defective, I got another controller that was supposed to be compatible with electric/hydraulic brakes but wasn't, a newer one of the same model was compatible.
E-Trailer lived up to their slogan, great products,low prices and they have good service too.


I have put three on these on different trailers and they work great!! They install easily and stop on a dime!! I highly recommend the purchase of the optional HBA-CAM. All the newer trucks can be a little tempromental with the intergrated brake control box. I have an "09" GMC 3500HD

Etrailer Expert

Laura E.


Thanks for your business and your review, Chris! For your reference, the # HBA-CAM is a required rather than optional add-on for 2007-2015 Chevy and GMC trucks and will not work with the OEM factory-installed brake controller.


I'm sure the product is great. I wouldn't know. Months waiting for this and the associated controller and my contractor informed arrived after having moved out of my house for months. Finally getting around to finishing this project now that I have resources all in one place. etrailer had no desire to even discuss the matter. I was disappointed with etrailer on this one. Check those lead times if you need it fast.


It was the best upgrade for a new brake system I was replacing the old electric brake!


Pump works great!!
I had installed a
round 1600 psi pump first,it had a manufacturer defect. The solenoid wire was pinched between the housing ,witch caused the pump to not be able to release pressure.


Packing was in horrible condition although I paid for Tandem axels only received enough for 1 Axle missing 2 rotors backing plates calibers after having help started and have apart realized only 1/2 enough.all bearing small parts for 2 axels were here called etrailer new missing parts arrived in less than 2 days it was a good thing I didn't have to be any place my mechanic can not finish for week.someonr at etrailer dropped the ball.


I have a 2015 GMC Sierra 2500HD Diesel, towing a 2017 Pinnacle 36FBTS 5th. wheel. The Pinnacle has a standard drum braking system. On a long trip this year I cracked both rotors on my truck from over heating related to the Pinnacle's drum brakes failing to fully provide proper stopping.
I decided no more, and after much review I replaced the factory drum brakes with the Kodiak Discbrake system. (my first time ever doing something like this) In addition, one of the key items for me was a way not to replace my on-board factory trailer brake controller, (did not want to use an aftermarket product, that would diminish the interior look ) thus I also added the control Adapter Module that enabled me to use the factory installed brake controller. With all this change I decided to also go ahead and add a separate brake away battery. Everything I just described are shown in the attached photos.

I found eTrailer extremely helpful in answering questions, although I did not have a lot of questions since their online videos proved most helpful.

All parts of the Kodiak system worked fantastic following a 2500 mile trip. The improved braking is superior, and I did not need to replace my on board controller, but continued to use it by installing the control adapter. The disc brake picture is one of the disc brakes that I examined following our trip...all in perfect shape with everything working great for the entire trip.

Morris G.


Working great as well as it did since installation


I purchased the HydraStar Electric over hydraulic actuator for disc brakes. I have been very happy with this purchase. Product arrived very quickly . Instructions were clear and installation went smoothly. Brake system is working great for me on my equipment trailer.

Billy K.


Unit it working well. I am very happy and satisfied with this unit. Thank you


I just received eoh trailer brake actuator. I will be installing it soon on my triaxle boat trailer, packaging is in good condition, so the actuator should work as intended. Service is outstanding as usual, shipping was excellent. If the Canadian dollar was i stronger i would certainly make more purchases from E-trailer. Thank you



The actuator worked great last year traveled over 5000 miles with it. As of late last fall my boat was stored on my trailer and because of covid19 the marina here on the east coast of Quebec wont open for another 6 weeks. The actuator was wrapped in plastic to protect it from the harsh winter here close to the ocean. I expect and need it work as it my trailer has to be certified road worthy to pull it on the public hwy. I will give you an up date in a couple of months. thks


What did we do before this device?! Great product and has made trailering less stressful.


Actuator worked fine. Battery back up went dead and actuator failed to work even was hooked to the truck when I put a new battery in it everything work fine again.


Very well assembled and top quality. Not excessive in size and fits easily in trailer. Extremely easy hookup and straight forward to do using instructions. Wired into existing break away and 12v RV battery'



Always works. Extra bonus was when I realized I could pull the release pin and hook up the fifth wheel without pushing the trailer up on the chocks or wheel lock so much.


I've towed my boat over 4000 miles this year and the electric over oil brakes have performed better than anticipated. The safety and control that I have with this system could not be better.

Henry S.




product showed up on time in working order, but was aesthetically damaged, the mounting tabs were bent and scratched ,it wasn't during shipping because the box was undamaged , so i would return it as its going on a 75k $ dollar polo trailer but my customer needs it asap the free shipping was nice , but would have gladly paid more for an undamaged actuator.





Kodiak disk brakes on a 95 EBY stock trailer.
Made a real trailer out of it...


Super fast delivery!!


I upgraded the 32" 12,000 lbs rated trailer to Electric/Hydraulic as the electric brakes really were not doing very much to help slow the trailer down. The overall upgrade included new 7,000# axles as well as this hydraulic converter next to the winch in the front of the trailer. If I ever get another trailer, this unit will be spec'd into it


Great to work with. Fast shipping. Friendly people.


Have been using this brake actuator for a year now with absolutely no issues. Other people who have committed on how much better my trailer brakes better than theirs. I’m looking at ordering another one to be placed on a trailer I’m changing the axles out on. I’m going from electric brakes to the hydraulic brakes. Great product


Replaced an original Hydrastar with a new one. Works great on my 28 ft triaxle boat trailer with disk brakes.


I installed this product on my fifth wheel RV about a year ago. I tow with a f350 drw truck and was always concerned with the way it stopped. Now there are no issues. Best upgrade I have ever made. Product was excellent. Product arrived as promised. customer service was great. Thanks etrailer


works great. Easy to set up and get wor king.

Show More Reviews

See what our Experts say about this Hydrastar Brake Actuator

Do you have a question about this Brake Actuator?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Reno H
Expert Research:
Reno H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Brandon M
Expert Research:
Brandon M
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Raymond P
Written by:
Raymond P
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M
Employee Matthew E
Updated by:
Matthew E
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F
Employee Dustin K
Video by:
Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Aidan B
Video by:
Aidan B
Employee Brent H
Installed by:
Brent H
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924