HELLA 4RA 965 400-001 Minirelais, Arbeitsstromrelais, 12 V, 4-polig, Spulenwiderstand: 90 Ohm, Halter: ja

HELLA 4RA 965 400-001 Minirelais

The HELLA 4RA 965 400-001 is a compact, high‑performance minirelay designed for automotive and industrial applications that require reliable switching of low‑voltage circuits. With its robust construction and precise electrical characteristics, this relay is ideal for controlling headlights, indicators, auxiliary lights, and various electronic modules in modern vehicles.

Key Electrical Specifications

• Operating Voltage: 12 V DC – the standard automotive supply voltage.
• Coil Resistance: 90 Ω – ensures a stable current draw and predictable magnetic field strength.
• Maximum Coil Current: Approximately 133 mA (calculated from V/R).
• Contact Rating: Up to 30 A at 12 V, suitable for high‑current automotive lighting and accessory circuits.
• Temperature Range: -40 °C to +80 °C – reliable operation in extreme climates.

Mechanical Features

• Four‑pole (4‑pin) Configuration: Allows for two separate circuits or a single circuit with common and normally open/closed contacts.
• Compact Size: The relay’s small footprint makes it easy to integrate into tight engine bay spaces or control modules.
• Integrated Mounting Bracket (Halter): A built‑in mounting bracket simplifies installation, reducing the need for additional hardware and ensuring secure placement on a vehicle’s chassis or control panel.
• Durable Housing: Constructed from high‑strength plastic with metal contact plates to resist vibration, shock, and corrosion.

Typical Applications

The versatility of the HELLA 4RA 965 400-001 makes it suitable for a wide range of automotive systems:

• Lighting Systems: Headlights, fog lights, parking lamps, and interior illumination.
• Signal Indicators: Turn signals, hazard lights, and brake light controls.
• Accessory Control: Power windows, door locks, seat heaters, and climate control modules.
• Electronic Modules: Engine management units (ECUs), body control modules (BCMs), and infotainment systems that require low‑voltage switching.

Installation Guidelines

1. Verify Coil Voltage: Ensure the supply line is strictly 12 V DC to avoid coil over‑stress.
2. Polarity Check: The relay’s coil polarity is not critical for a single‑phase AC/DC coil, but correct orientation ensures consistent operation.
3. Mounting Position: Use the integrated bracket to secure the relay on a flat surface. Align the pins with the corresponding socket or terminal block.
4. Wire Gauge Selection: For contact currents up to 30 A, use at least 12 AWG copper wire to minimize voltage drop and heat buildup.
5. Heat Management: Keep the relay away from high‑temperature components. The housing tolerates temperatures up to +80 °C, but prolonged exposure near hot surfaces may accelerate wear.

Reliability & Longevity

The HELLA 4RA 965 400-001 is engineered for long‑term reliability. Its high‑quality contacts and robust coil design reduce the risk of contact welding or coil failure, even under repeated switching cycles typical in automotive environments. The 90 Ω coil resistance provides a consistent magnetic field, ensuring that the relay activates reliably at every voltage cycle.

Compatibility with Vehicle Models

This relay is widely used across many vehicle platforms due to its universal design:

• Volkswagen Group: Golf V (1K1), Passat Variant (3B6), Audi, and Mercedes‑Benz models.
• Other Manufacturers: BMW, Ford, Opel, Scania, Triumph, Volvo, and many aftermarket OEMs incorporate this relay in their lighting and control systems.

Conclusion

The HELLA 4RA 965 400-001 Minirelais combines compactness, robust electrical performance, and a secure mounting solution into a single component. Whether you’re designing a new automotive lighting system or replacing an aging relay in an existing vehicle, this product delivers dependable switching for high‑current, low‑voltage applications.

Its precise coil resistance, four‑pole configuration, and integrated bracket make it a preferred choice among engineers and technicians who demand reliability and ease of installation in demanding automotive environments.