Original Bosch 0331802100 24V Repetitive Relay 5-Pin Mini Relay 24V DC 40A NO 20A NC ISO Automotive Changeover Relay

Full Model Marking

• Brand: Genuine Bosch Original
• Part No.: 0331802100
• Cross Volvo OE: 20392742
• Cross MAN OE: 81259020510
• Coil Voltage: 24V DC
• Coil Resistance: 72Ω standard range
• Contact Type: SPDT Single Pole Double Throw (5 Pin ISO Mini)
• Rated Current: 40A Normally Open / 20A Normally Closed Medium-Heavy Resistive Dual Load
• Built-in Component: No freewheeling diode / surge resistor
• Extra Feature: Integrated plastic fixed mounting tab
• Protection Grade: IP54 fully sealed anti-oil, dust & splash water
• Working Temperature: -40℃ ~ +85℃
• Housing: Thickened standard black flame retardant mini plastic, with integrated mounting ear

Product Specifications

• Model: 1PCS Genuine Bosch 0331802100 5 Pin SPDT Changeover Heavy Duty Automotive Mini Relay (Cross Volvo OE 20392742 / MAN OE 81259020510, 24V DC 40A NO /20A NC SPDT No Diode With Integrated Mount Tab Standard ISO Mini Size)
• Coil Voltage: 24V DC
• Contact Structure: 5 Pin ISO Single Pole Double Throw SPDT Mini Relay
• Rated Load: 40A Normally Open / 20A Normally Closed Resistive Medium-Heavy Dual Load
• Cross Part Number: 20392742, 81259020510
• Built-In Protection: No freewheeling surge diode / resistor
• Extra Accessory: Integrated plastic mounting tab for screw fixation
• Protection Grade: IP54 Anti-Oil, Dust & Splash Water
• Housing Type: Thickened standard black flame retardant mini plastic (with integrated mounting ear)
• Working Temp: -40℃ ~ +85℃
• Warranty: 6 Months Genuine Bosch Factory Warranty

Common Equipment Failures Solved

• Cheap generic 30A 5pin 24V relays have thin contacts, severe melting ablation under 40A medium-heavy dual load, leading to fan stall, fuel pump shutdown and equipment overheat short circuit
• Inferior thin plastic mini housing cracks under long-term heavy truck severe vibration, internal coil breakage causing total loss of dual-circuit switching control function
• Mismatched 12V relays burn coil instantly after installation, unable to operate normally
• Relays without built-in mounting tab cannot be fixed for exposed wiring environments, loose wiring leads to intermittent power failure
• Original Bosch 0331802100 5pin SPDT heavy-duty mini relay damaged, direct plug-and-play replacement without harness modification
• Heavy 24V truck/24V genset requires dedicated 5pin SPDT changeover relay for dual-circuit switching; 4pin single normally open relays cannot realize automatic switching between two circuits