Relay suggestions

[JoshHefnerX]

Looking for some good quality 5-pin bosch style relays that will reliably handle 30-35a continuous plus the startup surge.

The chinesium ones I have now are suspect.

What has been reliable for you guys.

 

[Wes Harden]

Bosch. Is their design, and you know german ocd

 

[Truckman4life]

I started using Del City for electrical supplies recently for work and they were fast and had good products. I looked at their relays and they sell Song Chuan which I have seen elsewhere too I believe.

 

[shady]

I have never actually had a 5 pin fail.
In any vehicle, ever that I can recall

I do know, that if your running 30-35 amps continuously, your going to want a 50 amp. Or it's going to fail for sure.

 

[Wes Harden]

For my fans I plan on using continuous duty solenoids.

 

[JoshHefnerX]

I couldn't find 'bosch' branded relays above 30a,

Which is why I was asking. I used to have pretty good google-fu but since they've enshitified it, my hit rate has gone down.

 

[Blue85]

What fan really pulls that much? If it's 2 fans, use 1 relay for each. The problem you're running into is that standard size relay terminals aren't really up to the task, nor are the contacts you find in a standard auto electrical center. It's very important to use good crimps (or solder), or the heat can melt the plastic base of the relay and it will fail. You can push the current by using non-standard terminals, but instead ones with a bunch of contact points. This may not be available in a pre-made relay socket. And of course, you have to use heavy wire. The copper pulls heat out of the contact.

40A is a standard rating for automotive relays. You just have to step up to the larger contacts. You could use a contactor/solenoid type to upgrade to ring terminals, but they are inefficient and noisy and you have to choose a continuous duty type.

Any interest in solid state?

 

[JoshHefnerX]

This is for fans - wired up in the 3-relay high/low gm manner of the gm ecm. So it really needs to be 5pin to work this way. I'd briefly considered using some single heavier on/off relays but powering one is just as likely to pull air through the other fan that's not running as it is the rad. Both fans on high pulled a max of about 30-32a but you never know how the chinese rate these. Was hoping to just find some good quality ones that will actually do their rated and see how those hold up first.

Was running into problems where the circuit wouldn't kick into high speed mode consistently. swapped relays out and they were working properly again. All of the relays I had, tested fine on the bench, but I wasn't able to put them under a heavy load - and heat.

 

[Wes Harden]

Novita makes a 45amp

 

[Wes Harden]

RL45 9.49at vatozone they will peob have to order.

Correction is a 40amp part # tricked me

 

[JoshHefnerX]

I ordered from Del City posted above. Found some 'picker' branded ones that may be ok. cheap enough to test out anyhow. Think some companies rebrand the pickers.. we'll see




for ref:

https://www.delcity.net/store/relays-power-distribution/picker-relays/nc-no-change-over-relays-30-50-amp/74802/

Finally found 40a Bosch but it's outta stock for the next 6 wks.
bosch:

Bosch Automotive 986332022

Free Shipping - Bosch Automotive 986332022 with qualifying orders of $125. Shop Relays at Summit Racing.

www.summitracing.com

 

[Weird Beard]

I have seen a fair amount of these over the years but have not personally used em........

1HO Single 70amp Relay Module

Single 70 amp relay module. Has heavy duty 70 amp industrial relay. Uses heavy duty J-case/FMX fuses NOT INCLUDED.Can be wired for positive or ground triggered.Fuses available in FMX/J case fuse category#10 battery input and relay output studs. Led indictor on output. ALL OUR RELAYS ARE FLYBACK...

www.leashelectronics.com