SKU: 007794027 / UPC: 760687121602
Hella Relay 12V 20/40A SPDT Res Multi-Purpose Automotive Electrical Switch
The Hella Relay 12V 20/40A SPDT Res is a compact 5-pin mini ISO relay designed for precise control in 12V vehicle systems. This black-housed unit handles ohmic loads up to 30A, capacitive loads to 20A, and inductive loads to 5A, with a temperature range from -40C to +85C for steady operation in varied conditions. Featuring resistor coil suppression to reduce electrical noise and a dust cover for protection, it meets IP54 standards against dust and splashes. The plug type B1 ensures straightforward integration into wiring harnesses, supporting normally open contact functions in changeover configurations.
Engineered for automotive reliability, this relay manages key circuits like engine control units, headlight cleaning systems, starters, fuel pumps, fan motors, horns, and fanfares. Its robust contacts and materials provide consistent switching under load, reducing downtime in daily driving or heavy-duty use. Mechanics and owners select this Hella model for its direct fit in OEM setups and broad compatibility, delivering the dependable performance needed for uninterrupted vehicle operation.
What’s Included in Your Purchase
- (1) Hella Multi-Purpose Relay (007794027)
- Dust cover pre-installed
- No additional mounting hardware or wiring (standard 5-pin spade terminals: 85, 86, 30, 87, 87a)
Key Specifications
- Voltage: 12V DC
- Current Rating: 20A/40A (continuous/resistive)
- Contact Type: SPDT (Single Pole Double Throw/Form C)
- Number of Terminals: 5 (mini ISO standard)
- Coil Suppression: Built-in resistor
- Protection Rating: IP54 (dust and water splash resistant)
- Operating Temperature: -40C to +85C
- Color: Black
- Weight: Approximately 0.04 kg (1.4 oz) per unit
- Cross-Reference Part Numbers: Bosch 0332209137, Mercedes-Benz A0009828123 / A0025421419 / A0025427419 / A0025428919 / A0035452705, Volkswagen/Audi 2E0937099, Siemens V23134-A52-X335
Vehicle Fitment
This universal 12V relay fits a wide range of passenger cars, vans, and light trucks equipped with compatible electrical systems. Confirmed applications include:
|
Make/Model |
Years |
Notes |
|
Mercedes-Benz Sprinter 2500 |
2007-2024 |
Multi-purpose relay for fuel pump, fan, or starter circuits |
|
Mercedes-Benz Sprinter 3500 |
2007-2024 |
Direct OE replacement |
|
Mercedes-Benz ML320 |
1998-2003 |
Convertible top and accessory relay |
|
Mercedes-Benz ML350 |
2003-2005 |
Engine and cooling fan control |
|
Mercedes-Benz ML430 |
1999-2001 |
Multi-circuit applications |
|
Mercedes-Benz ML500 |
2002-2005 |
Lighting and pump systems |
|
Mercedes-Benz ML55 AMG |
2000-2003 |
High-load relay duties |
|
Mercedes-Benz SL450 |
2018-2020 |
Convertible top relay |
|
Mercedes-Benz SL550 |
2018-2020 |
Accessory control |
|
Mercedes-Benz SL63 AMG |
2018-2019 |
Performance circuit relay |
|
Mercedes-Benz E-Class (W210) |
1996-2003 |
Including E430 models for wiper and multi-purpose |
|
Mercedes-Benz S-Class (W220) |
1998-2006 |
Including S600 for engine controls |
|
Mercedes-Benz SL-Class |
2003-2012 |
Including SL500 for various systems |
|
Volkswagen Crafter |
2012-2016 |
Main current relay |
|
Audi Models (various) |
2012+ |
Compatible via 2E0937099 OE number |
For exact match, verify your vehicle’s wiring diagram or consult a service manual. This relay serves as a direct replacement in systems matching the 5-pin SPDT configuration, extending to other 12V European and import vehicles with similar OE references.
Install in minutes with basic tools simply plug into the existing socket and secure. Backed by Hella’s reputation for OE-quality components, this relay keeps your electrical systems running smoothly, preventing failures in critical functions.
Order the Hella 007794027 today for a plug-and-play solution that matches or exceeds factory standards in every shift.








