ID
1232672
$ 58.14
1-2 weeks delivery time
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+
The ZF 3312308029 Neutral Safety Switch prevents engine start when the transmission is in gear. Designed for ZF and Hurth marine gearboxes, it features an IP67 waterproof rating, supports 12V/24V, and operates from –40°C to +85°C. Direct-fit, corrosion-resistant, SAE J1171 and ISO 8846 certified.
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ZF 3312308029 - Transmission Neutral Safety Switch, IP67, 12/24V, for ZF & Hurth Marine Transmissions
The ZF 3312308029 Transmission Neutral Safety Switch is a safety-critical marine component designed to prevent engine start-up when the transmission is not in a neutral position. This switch enhances onboard safety by protecting the engine and drivetrain from accidental engagement. Built for harsh marine environments, it offers IP67 waterproof protection, corrosion resistance, and thermal endurance from –40°C to +85°C. The unit is compatible with a wide range of ZF and Hurth transmissions and supports both 12V and 24V DC electrical systems. Easy to install with marine-grade insulated terminals, it ensures long-lasting performance and complies with SAE J1171 and ISO 8846 MARINE standards for ignition protection.
Key Features:
- Prevents engine start when transmission is engaged — enhances safety
- IP67 waterproof and corrosion-resistant for marine use
- Compatible with ZF and Hurth marine gearboxes
- Rated for 12V / 24V systems with high electrical reliability
- Operates in extreme conditions: -40°C to +85°C
- Direct-fit replacement for part numbers 1000-640-004 and 3312308029
- Spring-loaded plunger activation mechanism
- Marine-grade insulated terminals for fast, secure connections
- Meets SAE J1171 and ISO 8846 MARINE safety and ignition standards
Specifications:
Part Number ZF 3312308029 Product Type Transmission Neutral Safety Switch Voltage 12V / 24V DC Current Rating 5A @ 12V DC, 3A @ 24V DC Operating Temperature -40°C to +85°C Protection Class IP67 (waterproof and dustproof) Activation Type Spring-loaded plunger Switch Type Normally Open (NO) / Normally Closed (NC) Thread Size M12 x 1.5 Housing Material High-strength thermoplastic with metal core Contact Material Copper alloy with anti-corrosion coating Insulation Resistance ≥100 MΩ @ 500V DC Dielectric Strength 1000V AC for 1 minute Resistance Saltwater, oil, and hydraulic fluid resistant Mounting Type Threaded, screw-in with locking nut Certifications SAE J1171, ISO 8846 MARINE Shipping Dimensions 5" x 3" x 3" Shipping Weight 0.4 lbs (approx. 0.18 kg)
Compatibility:
Compatible ZF Transmissions:
- ZF 45A
- ZF 63 / 63A / 63IV
- ZF 80A / 80IV
- ZF 85A / 85IV
Compatible Hurth Transmissions:
- HSW 450A / 450D
- HSW 630H / 630A / 630V
- HSW 800A / 800V / 800A3
Application and Use:
The ZF 3312308029 Neutral Safety Switch is a critical component for marine applications, ensuring the engine cannot start while the transmission is engaged. Its robust, sealed construction makes it ideal for vessels exposed to moisture, vibration, oil, and saltwater. Compatible with a wide range of transmissions, it’s suitable for both recreational and commercial marine vessels requiring high-reliability safety systems.
Benefits:
- Improves safety by preventing unintended engine start-up
- Protects drivetrain and transmission components
- Withstands extreme environments and temperature fluctuations
- Marine-rated sealing and materials ensure long-term reliability
- Easy replacement with plug-and-play compatibility
- Complies with key marine safety standards (SAE/ISO)
- Minimizes installation time and electrical integration efforts
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