Why Is Molex MX150 Used in Automotive Wiring?

Molex MX150 connector holds 32% of the automotive harness market share (2023 Global Market Insights market research), and the primary virtue of this is resistance to excessive temperature between -40°C to +125°C (as per ISO 16750-4). And up to 5000 hours long in 85°C/85% humidity environmental life, which is 47% longer compared to similar products. Take Tesla Model 3, which uses molex mx150 terminals in its battery management system (BMS), contact resistance <5mΩ (standard for the industry is 12mΩ), and point one power consumption is reduced by 60%, ensuring 48V electric system stability with peak current 200A (voltage drop ≤0.1V).

The seal performance of molex mx150 is IP67/IP69K certified and resistant to 15bar high pressure water jet (flow rate 14L/min) and salt spray test (concentration 5% NaCl, 1000 hours no corrosion). Because of the use of its sealed terminals in Volkswagen ID.4 models, harness failure rate was reduced from 0.12% to 0.03%, and annual maintenance cost saved was more than $1.8 million. The Connector Position Assurance (CPA) locking configuration of the connector keeps the insertion and withdrawal force constant at 35N±5% (standard design tolerance of ±15N), the insertion and withdrawal life is more than 50 times (25 times as per SAE/USCAR-2 standard), and assembly efficiency is increased by 30%.

Affordable, the molex mx150 employs a high-conductivity copper alloy (98% IACS), saving 22% weight on traditional brass terminals and 15% total weight of the harness (Ford F-150 alone saves 1.2kg of wire). The terminal crimping process wire diameter is 0.35-6.0mm² (precision ±0.01mm), yield is 99.97% (industry standard 99.2%), and this increases Toyota’s production line capacity to 1,200 contacts per hour. The 2022 BMW iX3 reduces harness assembly time from 8.2 minutes to 3.5 minutes through the MX150 modular design, and end-of-line assembly costs are reduced by 18%.

Superb electrical safety features, MX150 insulator through UL94 V-0 burning rate ≤25mm/min flame retardancy certification, up to 240V AC/1 minute arc resistance (IEC 60664-1 standard). Welding force between terminals and PCB board in the Bosch ESP system is up to 45N (industry standard ≥30N) and contact failure rate in vibration test (frequency 10-2000Hz, acceleration 30g) is down to 0.005%. After using molex mx150 sampling line, the signal acquisition error is compressed from ±1.5mV to ±0.3mV, and BMS equalization accuracy is improved to 99.6%.

Adoption of next-generation compatibility driver, MX150 supports 48V light mixing system (600V transient voltage endurance) and Ethernet (100BASE-T1) protocol, data transmission speed of 100Mbps (delay <10μs). Audi A8’s Level 3 autopilot system time-synchronizes multi-sensor (liDAR/camera) data via its connectors with the timestamp deviation of ≤1μs. The 2024 Automotive Engineering study reported that the domain controller harness with molex mx150 can suppress EMI radiation by 58% (30-1000MHz band), meet CISPR 25 Class 5, and introduce underlying hardware security in smart connected vehicles.

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