Taiwan Semiconductor Corporation RS1BLH

Overview

RS1BLH from Taiwan Semiconductor is a fast recovery surface mount rectifier with 100 V repetitive peak reverse voltage (V_RRM), 0.8 A average forward current (I_F), and 150 ns reverse recovery time (t_rr), designed for DC–DC converters and automotive snubber circuits.

For engineers reviewing the RS1BLH datasheet, RS1BLH pinout, RS1BLH application, or RS1BLH equivalent, key selection criteria include its AEC-Q101 qualification, Sub SMA package compatibility with automated placement, and verified thermal resistance (R_θJL = 32 °C/W) for high-reliability power conversion designs.

Technical Context

The RS1BLH is a single-die, glass-passivated silicon junction rectifier optimized for fast switching in medium-voltage, low-current power paths. Its 100 V V_RRM, 30 A I_FSM, and 150 ns t_rr support efficient freewheeling and snubbing in compact automotive and industrial converters.

Thermally, it features R_θJL = 32 °C/W and R_θJA = 105 °C/W, enabling operation up to +150 °C junction temperature. The Sub SMA package meets UL 94V-0 and JESD201 Class 2 whisker requirements, with matte tin-plated leads compliant to J-STD-002.

Key Specifications

Pinout & Package

Package: Sub SMA - Surface-mount plastic package with cathode band polarity marking, UL 94V-0 molding compound, and matte tin-plated leads solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Compared with STTH1R04 and MUR105, the RS1BLH offers optimal balance of AEC-Q101 compliance, 100 V rating, 150 ns t_rr, and Sub SMA surface-mount compatibility-making it the preferred choice for space-constrained, thermally demanding automotive power stages where 100 V blocking suffices.

Availability

RS1BLH is available at Aetrix Electronics and suitable for automotive LED lighting, DC–DC converter output rectification, and snubber networks requiring stable component supply and long-term production continuity.

Supply support for RS1BLH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and automotive-qualified components.

The RS1BLH belongs to TSC's RS1xLH fast recovery rectifier family, engineered specifically for AEC-Q101-compliant automotive power conversion-emphasizing reliability, thermal robustness, and automated assembly readiness.

FAQ

What is the maximum junction temperature rating for RS1BLH?

The RS1BLH has a maximum junction temperature (T_J) of +150 °C, validated across its full operating range. This rating is supported by its glass-passivated die construction and Sub SMA package thermal performance (R_θJL = 32 °C/W). Engineers designing for under-hood automotive applications must ensure board-level thermal design maintains T_J ≤ 150 °C under worst-case I_F and ambient conditions. The RS1BLH datasheet specifies derating curves confirming usable current down to T_A = 125 °C.

Is RS1BLH suitable for use in AEC-Q101-compliant automotive designs?

Yes, RS1BLH is explicitly qualified to AEC-Q101 standards, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD). Its Sub SMA package meets JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity level 1-eliminating bake requirements prior to reflow. This makes RS1BLH appropriate for safety-critical automotive subsystems such as LED lighting drivers and HVAC blower controls where long-term reliability is mandated.

What does the 'BLH' suffix indicate in RS1BLH?

The 'BLH' suffix in RS1BLH identifies the specific voltage grade and packaging variant within the RS1xLH family: 'B' denotes 100 V V_RRM, 'L' indicates Sub SMA package, and 'H' signifies halogen-free construction per IEC 61249-2-21. This coding aligns with TSC's standardized ordering scheme where RS1ALH = 50 V, RS1BLH = 100 V, and so on up to RS1MLH = 1000 V-all sharing identical Sub SMA mechanical form and thermal characteristics.

How does RS1BLH compare to RS1ALH in terms of electrical performance?

RS1BLH and RS1ALH share identical I_F (0.8 A), I_FSM (30 A), t_rr (150 ns), and thermal parameters-but differ in V_RRM: RS1ALH is rated for 50 V, while RS1BLH is rated for 100 V. Both use the same Sub SMA package and glass-passivated die. The higher V_RRM of RS1BLH enables use in 24 V nominal systems (e.g., commercial vehicle lighting), whereas RS1ALH is limited to 12 V applications unless significant voltage derating is applied.

What is the reverse leakage current specification for RS1BLH at elevated temperature?

At T_J = 125 °C and rated V_R = 100 V, the RS1BLH exhibits a maximum reverse leakage current (I_R) of 50 µA-five times higher than its 5 µA limit at 25 °C. This temperature-dependent increase is inherent to silicon PN junction behavior and is fully characterized in the datasheet's Electrical Specifications table. Designers must account for this in low-power standby modes where cumulative leakage across multiple diodes could impact system quiescent current.