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Beuler BU508TD 12 VDC Automotive 4-Pin SPST Time Delay Relay with adjustable timing

Beuler BU508TD 12 VDC Automotive 4-Pin SPST Time Delay Relay with adjustable timing

Beuler 12 VDC Automotive 4-Pin SPST Time Delay Relay

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Item sku:BU508TD
Beuler

Overall Rating 4.7 (Based on 13 reviews)

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Beuler BU508TD Product Highlights

  • Imported Bosch style relay
  • Adjustable time delay 2 seconds to 3 minutes with internal potentiometer
  • 30 amp / 50 amp rated contacts
  • SPST - Single pole Single throw

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Overview

Unit includes: 12 volt time delay relay

Beuler BU508TD 12 VDC Automotive 4-Pin SPST Time Delay Relay with adjustable timing

The Beuler BU508TD is a very cool relay. Have you ever wanted to have something stay on for some time after a momentary button is pressed? The BU508TD relay is just the relay for you. This relay is a time delay relay with adjustable timings allowing you to control any device. This relay is perfect for a variety of things such as secret compartments, safes, extended remote turn. It utilizes popular Bosch style connections and is frequently used in automotive sound and security installations. It easily switches 30 amps of current and peaks of 50 amps with minimal draw on the coil of 151 milliamps @ 12Vdc. Single Pole, Single throw for flexible installations and multiple uses.

    Features:
  • Imported Bosch style relay
  • No mounting tab
  • Momentary pulse to trigger latching
  • Adjustable time latching from 2 seconds to 3 minutes with internal potentiometer, the time delay extends or delays the termination of the relay
  • Relay turns off by preset time after 12 volt trigger is removed
  • Internal green LED to indicate status
  • Removable cap
  • 30 amp / 50 amp rated contacts
  • SPST - Single pole Single throw
  • 12 Vdc rated coil with minimum 8 volt to trigger
  • Power consumption @ 12Vdc 151 mA
  • Conventional 87, 87a, 30, 86, and 85 pin locations
  • Compatible with most insulated and non insulated terminals and relay sockets
  • Dimensions 1" (W) x 1-1/8" (D) x 1-7/16" (H) with terminals
    Pin configuration:
  • Pin 30 - Must have constant or accessory 12 volts all-time, as this is what powers the circuit on the relay
  • Pin 85 - Ground
  • Pin 86 - Single pulse (+12 volts) to trigger time delay (Constant 12 volts can be applied and once removed relay will stay latched for duration of timer. Negative feedback will require a diode to prevent capacitor discharge)
  • Pin 87 - +12 volt output (on for duration of set time)
    Uses:
  • Low voltage trigger: input will trigger with as little as 1 volt (Constant or pulsed)
  • Momentary pulse to timed latch: use a momentary switch to trigger for a short duration (up to 3 minutes)
  • Voltage inverter: temporarily reverse the polarity to a drain (requires additional relays
    Note: Adjustment of the time delay function is very sensitive. For video demonstration purposes the potentiometer was turned limit to limit, when adjusting for your situation use incrementally small adjustments from the minimum limit to your desired setting

Technical Specifications

Manufacturer Beuler
Part Number BU508TD
Operation Voltage 8 - 15 volt
Relay type Time delay relay
Current capacity 30 Amp / 50 Amp
Pole switching type SPST (Single pole Single throw)
Tab type No Tab
Waterproof ingress protection None
Warranty 1 Year
UPC Code No

Customer Reviews

Great product
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
Great product.....great quality.......works as expected (Posted on 10/5/2016)
Fantastic product
Review by
Value
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Install (5 star for easy)
Durability
Quality
I bought this for my HID fog lights, turning hid on and off in short succession can shorten the life of your hid bulbs,so with a relay harness already installed I remove the regular relay and replace it with my fantastic time delay relay. with a little adjustment on the screw, my hid bulbs stay on for 45 second after switch turn off, nothing beats that. I think you can get up to about 3 min of time delay. (Posted on 8/23/2016)
Works but need to understand what you're using for the trigger...
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Install (5 star for easy)
Durability
Quality
In my car, I have an analog signal from a sensor that feeds info to my ecu. Because it's hooked up to the accessory power, this signal is lost during the start-up sequence (accessory power is essentially turned off). My hopes were to simply swap this time-delay version with the one currently in-use...but it doesn't work that way. I had to rewire my setup to allow another relay to trigger this time-delay version. Afterwards, you find that the adjustment isn't very clear. Adjust in small increments or bench test it beforehand. (Posted on 8/16/2016)
works and fit well for my time delay need
Review by
Value
Price
Install (5 star for easy)
Durability
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work very well, but it is not just like putting in a standard relay (Posted on 8/7/2016)
Awesome little device !
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
I bought this to build an alarm for my motorcycle. In fact I bought 2 just in case I liked the first one. The adjustable timing is very sensitive,so hook it up first before you go cranking on it. Turn it in small (and i mean small) increments to get the desired setting. Timing between cycles may vary by a few seconds but it works perfectly. I also bought metal ball tilt switches to trigger the cycle of the relay, and have it powering a turn signal flasher routed to my horn. This little combination cycle my horn every second for a 30 second interval then resets,if the bike is returned to the kickstand within that time. Beats paying $400 for an alarm system and works Great ! (Posted on 4/5/2016)
Works great
Review by
Value
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Install (5 star for easy)
Durability
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This product works as expected. It is very sensitive to adjust the delay time but once you have it where you want it works great. (Posted on 2/17/2016)
Just what I needed.
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
This relay was used on the circuit of a rear back up camera. I wired the relay to close with the reverse lights on the car. When the relay was closed the camera in the rear view mirror was activated as if it was OEM install. I chose this timed relay since I desired for the camera to remain on for a short time even after the car was out of reverse. It's nice to see what's going on behind the car even when beginning to move forward. This relay is the only thing available for my need. Thank you. (Posted on 2/14/2016)
Very Good
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
This relay with delay time work very very good, i have only 3 complaints:

a) The screw to control de delay time is very very sensitive, An little small move make a big change, I recommend to tune in a work bench first .

b) If you have a load other than the relay signal in the line , it will not work properly the delay time, The solution is to add a Diode in the Signal cable to isolate from any other load, that way it will work perfectly.

c) The relay if not 100% seal , so time will tell how reliable it will work in my application (how reliable), I am using this inside the engine bay of my Grand Cherokee, so far (+/- 3 months) no issues.

So I am very happy with the relay, It did fix the problem I had with the HID lights perfectly, I try condensers etc w/o luck, this was the only GOOD solution .

Thanks
(Posted on 1/3/2016)
Great
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
The relay works great. Just as I expected. (Posted on 12/29/2015)
Works great but some understanding how the electrical system on your vehicle works
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
I installed day time running lights on my vehicle. I wanted to have the lights shut off a few minutes after power shut off to be able to use the light while walking into the house or other areas at night. Installation is very easy but the issue I was having that when bench tested it worked exactly how it was intended, but when I installed it in the vehicle the delay timer would not work. What I found is I have the 12v trigger source connected to the accessory power. The issue is that there are other accessories that are connected to this as well such as the radio. The capacitor which holds temporary power then grounds out from the other accessories and drains the power from the capacitor immediately thus the timer would not work as intended. So the fix is adding an additional regular 4 prong light relay on the 12v accessory power wire right before the delay timer relay. This disconnects the 12v accessory power so that the capacitor will not get grounded and drain the power immediately. Once I did that the delay relay timer works like a charm and works exactly how I wanted it too. (Posted on 12/25/2015)
Works great but requires figuring it out yourself
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Value
Price
Install (5 star for easy)
Durability
Quality
This relay is just the ticket for a delayed shut down of a radiator cooling fan. However, it came with no instructions, just a terminal diagram on the side of the case. Adjusting the delay is not obvious. I figured it out with a little trial and error, but instructions would have been helpful and saved me time. (Posted on 12/1/2015)
Just the thing
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
I was looking for a way to keep my retrofit HID lights on during the startup of my car to prevent the ballasts from failing prematurely. This unit does exactly what I need. I have been running it for several months and it appears to be working without a hitch. Durability was only 4 stars as you have to open the unit to adjust the time setting. This means it is not a sealed unit and that concerns me over time. Also of note, is the time adjustment is VERY sensitive, and not at all marked or noted anywhere. It took many tests to get the timing down to where I wanted it. Overall though, this is just want I needed and I am pleased with the results. (Posted on 11/28/2015)
OK but missing information
Review by
Value
Price
Install (5 star for easy)
Durability
Quality
The relay itself works and appears to be a quality unit. All indications are that it will work fine for a long time. However, it was not made known in the literature that there is a "speed" at which the trigger voltage must be removed in order for the time delay mechanism to work. On the bench hooked up to a DC power supply the time delay mechanism works; in the car it does not when triggered by the ignition switch power cut off. (Posted on 7/17/2015)

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Ask questions receive answers.

Posted by David, Wednesday, September 28, 2016

Question:

Will this relay function appropriately if the trigger circuit is switched on the ground side?

Answers:

  • Posted by Store Owner on Wednesday, September 28, 2016
    A: There is not but you could use another relay and do a polarity reverse circuit and that will allow you to use ground.
Posted by Britton Britton, Tuesday, July 21, 2015

Question:

I have a 4 pin time delay relay that terminates after the trigger is removed for a certain period time. I bought 2 relays from this site and I put 12 volt power on them and nothing happened. Is something wrong with are they broken?

Answers:

  • Posted by Mike Yang on Tuesday, July 21, 2015
    A: The time delay relay function is EXTREMELY sensitive. The screw that controls the time delay needs to only turn a fraction of a turn. I mean smaller turn than a hair.

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