Is this flasher realy on/off at all times once power is supplied to unit?

First of all it is not a flasher relay as does not have a timer installed inside it is a standard relay with normally closed or open contacts and when power supplied to it the contacts will operate depending on which tab you have wired to will make or break the supply to the device being powered I use for switching vac pumps on braking systems for locos on a small railway.

Is this a latching relay? Push a button to start, then push a button to stop?

noo. you don't have to push any button , it start automatically and stop automatically ,, ( by current )

Will it be able to switch a 36v main with a 12v signal input?

It's rated 12 volts so unlikely. Fine for car spot lights or in my case heated windscreen.

From what I know of relays, the diagram on this listing shows incorrect wiring. Can you confirm please?

Hello, the diagram on this listing shows is correct, pin85 and pin86 can connect battery and ground in reverse

Gebildet 4pcs Jd1912 Car Relay Harness 12v 40a 4 Pin | Desertcart British Virgin Islands

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Description

⚡ Power up your ride with precision and speed!

ENDURANCE YOU CAN TRUST - Engineered for 100,000 electrical cycles and 10 million mechanical operations—built to outlast your ride.
LIGHTNING FAST SWITCHING - Operate and release times under 15ms keep your systems responsive and smooth under pressure.
ROBUST 40 A LOAD HANDLING - Supports heavy-duty automotive, truck, motorcycle, and marine applications without breaking a sweat.
BUILT IN DIODE PROTECTION - Safeguards your vehicle’s electronics from voltage spikes, ensuring longevity and reliability.
PREMIUM SILVER ALLOY CONTACTS - Delivers ultra-low resistance (≤100mΩ) for efficient power transfer and minimal energy loss.

The Gebildet 4pcs JD1912 Car Relay Harness is a high-performance 12V 40A 4-pin SPST relay set featuring built-in diodes for voltage spike protection, premium silver alloy contacts for low resistance, and ultra-fast switching times. Designed for automotive, truck, motorcycle, and marine use, it offers exceptional durability with a lifespan of up to 100,000 electrical operations and 10 million mechanical cycles, ensuring reliable and efficient power management in demanding environments.

Specifications

ASIN	B07BK4DBPB
Best Sellers Rank	2,490 in Automotive ( See Top 100 in Automotive ) 4 in Car Relays
Brand	Gebildet
Coil Resistance	73.33 Ohms
Coil Voltage	1.8 Volts (DC)
Connector Type	4 Pin Terminal
Connector type	4 Pin Terminal
Contact Current Rating	40 Amps
Contact Material	Silver Alloy
Contact Type	Normally Open
Contact material	Silver Alloy
Contact type	Normally Open
Country Of Origin	China
Current Rating	40 Amps
Current rating	40 Amps
Customer Reviews	4.6 out of 5 stars 451 Reviews
Manufacturer	Gebildet
Manufacturer Part Number	DE127
Minimum Switching Voltage	8 Volts (DC)
Model Number	1
Mounting Type	Wall Mount
Mounting type	Wall Mount
Operating Time	0.02 Seconds
Operation Mode	Electric
Release Time	0.01 Seconds
Specification Met	dc
UPC	646040294544
Wattage	1.8 watts

Reviews

S**W

7.12.2025

R**G

17.10.2025

M**G

6.04.2025

K**N

13.01.2020

D**.

19.12.2019

S**E

9.01.2025

M**N

20.10.2020

W**S

22.04.2020

W**E

4.07.2022

A**S

20.08.2025

J**N

6.11.2020

B**O

2.08.2025

C**N

22.04.2021

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$32.81

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In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

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Gebildet 4pcs JD1912 Car Relay Harness 12V 40A 4 Pin SPST with Built-in Diode for Automotive Truck Van Motorcycle Boat

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