Cocar 12T12-4A Car DC 12V 4A Voltage Stabilizer Surge Protector Power Supply Regulator for Auto Truck Vehicle Boat Solar System etc.(DC10-36V Input, DC12V Output)
£23.99
Price: £23.99
(as of Jun 21, 2025 16:47:08 UTC – Details)
DC12V to DC12V Car Truck Vehicle Power Voltage Stabilizer Surge Protector:
-The import high heat conduction organic silica gel filling and sealing technology, and compatible with multiple automatic protection function, overcurrent, short circuit, overtemperature, waterproof, moistureproof,these distinctive characters make our Power Supply Converter Regulator?widely used on Bus, CMB, large trucks, motor, GPS navigation, solar power, photovoltaic energy, bus display, taxi advertising screen, car audio, LCD TV, LED, intercom and monitoring system.
Safety Instructional Manual
1. The load connected to the output end of the power regulator should not be more than MAX LISTED LOAD
POWER, any higher rated load will cause damage to the power regulator.
2. Can not used long time by the MAX. LISTED LOAD POWER
3. Please connect the converter and your device according to the wiring diagram provided
Features:
-IP67 Protection grade,waterproof and anti-shock protection.
-More than 96% power conversion efficiency.
-Si-Fe Cores magnetic loop, high temperature resistance and super stability.
Specifications:
Material: Plastic, Electronic Parts
Input: DC 12V(10V – 36V)
Output: DC 12V 4A 48W
Conversion Efficiency: More Than 96%
Overtemperature Protection: 150C
Protection Grade: IP67
Connection Wire Length: 12cm(4.7 inches)
Mounting Hole Diameter: 5mm(0.2 inch)
Mounting Hole Distance: 65mm(2.56 inches)
Body Size: 74mm x 74mm x 32mm(L*W*H)
Net Weight: 250g
Package Includes:
DC12V to DC12V Waterproof Power Regulator x 1
Is discontinued by manufacturer : No
Product Dimensions : 7.4 x 7.4 x 3.2 cm; 250 g
Date First Available : 9 April 2017
Manufacturer : Cocar
ASIN : B06Y5JHZG2
Item model number : 12T12-4A
Country of origin : China
Department : Men
Guaranteed software updates until : unknown
4A DC 12V surge protector power supply regulator for Car Auto Truck Vehicle Boat Solar System etc.
Protect your devices from being damaged by un-stable voltages from old cars battery or other electricity reasons. Input voltages range: DC10-36V, Output stable DC 12V.
IP67 Waterproof alloy housing makes this kit ideal for use in a wide range of applications including vehicles, security systems, hospital equipment, telecommunications etc Built-in over-voltage, under-voltage, overload, over-heat and short circuit protection
The length of the line is about 12CM, slim, small volume, easy installation.
High quality and performance. 3 Year Warranty. Weight: 250g. Size: 74mm x 74mm x 32mm(L*W*H).
Customers say
Customers find the power converter works well, with one mentioning it successfully runs a Huawei router. The device features sturdy construction and provides stable 12-volt output. Customers appreciate its ease of use, with one noting the clear wiring instructions.
13 reviews for Cocar 12T12-4A Car DC 12V 4A Voltage Stabilizer Surge Protector Power Supply Regulator for Auto Truck Vehicle Boat Solar System etc.(DC10-36V Input, DC12V Output)
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£23.99
W. Richman –
Works fine for our 4g/5g wifi router
Bought it to let us run our TP-Link router directly from the leisure batteries instead of running the inverter to produce 240vac and then dropping it right back to 12vdc with the router wall wart. Connected 12vdc from the batteries to the input and cut and spliced the router power cable to the output. Just make sure you have the polarity right! Working fine after several weeks.
Amazon Customer –
Does what it says it does
Wanted this for a camper van project and it does what it says. Puts out a steady 12v which was what was needed
T. Sullivan –
Seemingly sturdy construction, mounting holes let it down.
We wanted to have an Amazon Echo Show in our Motorhome and although it is a 12v device, many domestic 12v units don’t live long on vehicle 12v which can often be as high as 14.4v with the odd spike. The Show may have regulating chips inside but rather than risk it being destroyed we bought this stabilised supply. The output was connected to an Amazon 5m extension cable and the mains supply dispensed with. It has been working well for a Week or more so no reason to suppose it won’t continue. The reason for the four stars was that although the heat sink casing is heavy duty the two mounting holes are too far inboard. The holes will accept M5 screws but they are so close to the body that the heads jam long before they reach the flange. The only solution I found was to cut the sides of the holes out to create ‘forks’ which allowed M5 screws to just grip the flange.
Ben –
Works well
Simple and does the job! Ended up buying more than one to regulate the charging/float voltage in my campervan to 12v for voltage sensitive accessories.
Gallimores Restaurant Wigan –
Not recommended for strict voltage
Although the output was 12volts wasnt rectified so when ignition on voltage was unstable,
M. W. Smith –
Works fine!
This product is small and quite robust. I have used it for powering my WiFi router and modem on my boat. Both units have performed well using this device
s mck –
Perfect
Very simple to fit and works as intended.
Amazon Customer –
broke after 10 mins
Maybe i was unlucky, but mine stopped working after 10 mins of use. I was using it between a car battery and an inverter to make sure the inverter is never overloaded (as it has done before when my solar panel is charging the car battery and it becomes full. Then the voltage can go higher and i needed this kind of stabiliser unit to solve that)
Client d’Amazon –
Avant de monter ce dispositif mais lumière LED plafonnier claquer très rapidement avec ce matériel mais LED plafonnier ne claque plus.La tension de sortie est vraiment très stable et conforme au descriptif ce matériel est monté depuis plus d’un an
Lamesa Paolo –
Ottimo prodotto, in uscita sempre 12,3 volt qualunque sia la tensione in ingresso; ovviamente senza superare il limite max imposto.
Kindle Customer –
Came exceptionally quick. Not used it yet but appears to be good quality
Ralf Bilske –
Gerne wieder
Brandon –
I wired this in over the weekend without taking it apart first. Iâm using it for suspension/rock lighting (x11 3-led modules 12v .250mA). x4 come on at door open & the rest on switch. I donât care if it shorts out & blows my lights, they cost me $6 to replace.I wired a direct feed from an aux fuse panel that I put in that read 14.2vDC with engine idle. I grounded both leads & body to chassis & gave it a 5A fuse.The tested output is 18awg at 10â & with x4 LEDs powered, It showed 12.20vDC at 1A at the LEDs & the same at the regulator with no load. At idle with no load, this module showed .001A for a moment then nothing. I couldnât find it in mA or uA.I decided to leave it wired direct to observe the draw and because my 95 Chevy truck is negative pulsed interior lighting with positive ground. I made it a relay activated output & I have the rocklights activate on domelight trigger for door locking/unlocking.Note: If you do this type of lighting, keep in mind the negative trigger floats a positive voltage when not activated due to the lighting control module under the dash so keep the coil circuit dedicated to minimize load/shorting/abnormal pathways to battery through the control module.I did accidentally send my rigids through the module for a brief moment & the drain of x2 dually driving pods, sent it to 6.5A for a second with no issues. Iâve noticed no heat buildup on thermal at 1A nominal & 2.5A occasional.I do have a slightly weaker fm station thatâs in stereo maybe 70% of the time. When this is running under the hood (1A continuous draw), it takes the station out of stereo & gives me enough static to not be able to hear it. Closer antennas are not effected. Later I plan to try a capacitor, choke or diode combinations to attempt to remove the interference. Iâve not put it on the scope cause again, I donât care about outcome in this project.