Viair Corporation
Viair Corporation 93979 40-Amp 24V Heavy Duty Relay
A 24-volt heavy-duty relay rated for 40 amps to switch high-current automotive circuits
- 24V coil voltage matches 24V vehicle systems
- 40A contact rating handles high-current compressor loads
- Heavy-duty construction withstands vibration and heat
- Viair brand trusted for air-system reliability
- California Prop 65 warning included for chemical compliance
Heavy Duty 24V Relay for High-Current Circuits
The Viair Corporation 93979 is a 24-volt relay rated at 40 amps, designed to switch heavy electrical loads in air compressor and vacuum pump systems. It suits installers and fleet technicians who need reliable power distribution for 24-volt accessories.
40-Amp Contact Rating at 24 Volts
The decisive specification is the 40-amp contact capacity at 24 volts, which determines whether the relay can handle the compressor clutch or pump motor without overheating. Buyers who need higher continuous current or a different coil voltage cannot use this part.
Mounts in Standard Relay Sockets for 24V Systems
The relay plugs into common 24-volt sockets, requiring a compatible fuse or breaker upstream and adequate wire gauge for the 40-amp load. It frees the control circuit from carrying high current, letting a low-power switch or ECU command the compressor safely.
Highlights
- 24V coil voltage matches 24V vehicle systems
- 40A contact rating handles high-current compressor loads
- Heavy-duty construction withstands vibration and heat
- Viair brand trusted for air-system reliability
- California Prop 65 warning included for chemical compliance
Specifications
| Brand | VIAIR |
|---|
Questions about this item
What does the 40-amp 24-volt rating mean when the relay is installed in a vehicle system?
It means the relay can switch loads up to 40 amps at 24 volts, suitable for controlling high-draw accessories like compressors.
What interface or standard governs the 40A 24V switching capability in practice?
The relay uses a standard automotive terminal layout for 24-volt 40-amp switching, compatible with typical heavy-duty wiring harnesses.
What physical mounting provisions does the 93979 relay require to fit in an engine bay?
It mounts via a standard bracket or flange using common automotive hardware, allowing secure installation on a firewall or chassis rail.
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