Littelfuse has introduced the FlatSuppressX TP5.0SMD-FL and TP1KSMB-FL series of automotive TVS diodes specifically designed to protect sensitive 48V vehicle electronics from transient overvoltage events. The devices use proprietary FlatSuppressX technology that delivers ultra-low and highly stable clamping voltage, helping safeguard DC/DC converters, gate drivers and power management ICs while reducing system cost.
Littelfuse FlatSuppressX TP5.0SMD-FL and TP1KSMB-FL TVS diodes for 48V automotive electronics
Key Specifications
Technology: FlatSuppressX with advanced foldback/snapback I-V characteristic
Response time: Typical < 1 ps
TP5.0SMD-FL: Up to 5 kW peak pulse power (DO-214AB / SMC package)
TP1KSMB-FL: 1 kW peak pulse power (DO-214AA / SMB package)
Qualification: AEC-Q101 automotive grade
Compliance: Designed for 48V systems according to ISO 21780
Ultra-low and stable clamping voltage (prevents exceeding absolute maximum ratings of downstream components)
Supports lower voltage-rated MOSFETs, gate drivers and power ICs → reduced BOM cost
Tape-and-reel packaging for automated assembly
Unlike conventional TVS diodes whose clamping voltage rises significantly under high-energy transients, FlatSuppressX maintains a nearly constant protection level. This controlled response also helps avoid latch-up issues.
Target Applications
Battery Disconnect Units (BDU)
Zone Control Units (ZCU)
Electric Power Steering (EPS)
DC/DC converters and power distribution networks
48V power buses and I/O interfaces
As automotive architectures continue migrating to higher-power 48V systems, these devices offer scalable surge protection with high power handling in compact surface-mount packages.
