Introducing the High Efficiency Contactor (HEC) from Sensata Technologies – the intelligent switching solution for next-generation electric vehicles. Engineered to support seamless 400V and 800V battery configurations, the HEC enables full compatibility with evolving charging infrastructure while enhancing safety, efficiency, and system integration. With its patent-pending technology featuring mechanically synchronized contacts, ultra-low contact resistance, and bi-stable design, the HEC delivers robust performance in demanding automotive, truck, and bus applications including vehicle-to-grid, autonomous driving, and Megawatt charging scenarios.

Features

• Up to five battery configuration states:
  • Standard states: Series Mode (800V Drive/ Charge), Parallel Mode (400V Drive/Charge), Isolation Mode (All open)
  • (Optional) Single-path states: A-only (Battery A only), B-only (Battery B only)
• Continuous current up to 1000 A
• Contact resistance: ~50 µΩ (low & stable)
• Shock robustness 90 g
• Short-circuit withstand 25 kA
• Operate time: <0.5 s
• Hold power: 0 W (bi-stable design)
• Position feedback: ASIL-D compliant sensor

Key Benefits

• Flexible Configuration – Supports standard battery configurations (Series-800V, Parallel-400V, Open-Isolated) and single pack selection (A-only / B-only) for battery balancing and limp-home modes that extend battery life and ensure continued drive capability.
• Inherently Safe – Unique mechanical design prevents incorrect switching, eliminating short-circuit risk.
• Robust Performance – Withstands short circuit events up to 25 kA and mechanical shocks over 90 g.
• Compact & Lightweight – Reduces system component count by over 50%; no extra cooling or special equipment required.
• High Efficiency – No holding power (bistable design); ultra-low contact resistance minimizes energy loss.

Specifications