Taiwan Semiconductor Corporation HER156G B0G

Overview

HER156G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 1.5A average forward current and 600V repetitive peak reverse voltage (V_RRM). It features low forward voltage drop (1.7V at 1.5A, 25°C), 75ns reverse recovery time, 20pF junction capacitance, and operates up to 150°C junction temperature - optimized for switching-mode power supplies and freewheeling paths in automotive-grade DC-DC converters.

For engineers reviewing the HER156G datasheet, HER156G pinout, HER156G application, or HER156G equivalent, key selection considerations include its DO-204AC (DO-15) package, AEC-Q101 qualification eligibility (via H-suffix variants), surge rating of 50A (8.3ms), thermal resistance of 60°C/W, and verified performance in high-frequency flyback and boost converter topologies.

Technical Context

This device is a single-die, planar passivated PN-junction rectifier with fast recovery characteristics. Its 75ns trr and low Qrr support efficient operation in 50–500kHz switching converters, while the 1.7V VF at rated current balances conduction loss and thermal management in compact layouts.

The DO-204AC package provides standardized axial leads with cathode band polarity marking, pure tin plating compliant with J-STD-002, and UL 94V-0 molding compound. Junction-to-ambient thermal resistance is fixed at 60°C/W under standard PCB mounting conditions.

Key Specifications

Pinout & Package

HER156G uses the DO-204AC (DO-15) axial-leaded package: cylindrical black epoxy body, 5.2–6.2 mm length, 2.5–3.5 mm diameter, with cathode indicated by a single silver or white band on the body. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-efficiency rectifier applications.

Compared with STTH1L06 and MUR160, HER156G offers balanced trade-offs: higher VF than both but superior surge capability vs. STTH1L06 and broader AEC-Q101 qualification pathway vs. MUR160 - making it optimal for cost-sensitive automotive and industrial SMPS where thermal design margin and qualification traceability are prioritized.

Availability

HER156G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, automotive-grade reliability options, and consistent DO-15 packaging across production volumes.

Supply support for HER156G 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 diodes, and MOSFETs for industrial and automotive markets.

The HER15xG series was designed specifically for high-frequency, high-reliability rectification in space-constrained power supplies - emphasizing low trr, stable IR over temperature, and AEC-Q101-ready construction.

FAQ

What is the maximum junction temperature rating for HER156G?

The HER156G has a maximum junction temperature (T_J) rating of +150°C, with operational storage temperature ranging from –55°C to +150°C. This allows deployment in under-hood automotive environments and sealed industrial enclosures where ambient temperatures exceed 85°C, provided PCB thermal design maintains junction temperature within limit using the specified 60°C/W R_θJA.

Does HER156G have AEC-Q101 qualification?

HER156G itself is not AEC-Q101 qualified; however, the HER156GH variant - identical electrically and mechanically but manufactured under AEC-Q101 stress-test protocols - is available. The "H" suffix denotes qualification, and both share the same DO-204AC package, marking code (HER156G), and electrical specifications per Taiwan Semiconductor's I2105 datasheet revision.

What is the reverse recovery time (trr) of HER156G and how is it measured?

The HER156G has a typical reverse recovery time (t_rr) of 75 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A per the datasheet. This value reflects performance in high-frequency switching applications and is validated using standardized half-sine test waveforms - critical for predicting EMI and switching loss in 100–500 kHz power converters.

Can HER156G replace a 1N5408 in a 3A power supply?

No - HER156G is rated for 1.5A average forward current, whereas the 1N5408 is rated for 3A. Substituting HER156G in a 3A design would cause thermal runaway and premature failure. For 3A applications requiring fast recovery, consider HER306G (3A, 600V) or equivalent; HER156G is strictly intended for ≤1.5A continuous duty cycles with appropriate thermal derating.

What does the "G" suffix mean in HER156G?

The "G" suffix in HER156G indicates green (halogen-free) molding compound compliant with IEC 61249-2-21 and RoHS Directive 2011/65/EU. It does not denote packaging type or qualification level - all HER15xG parts use DO-204AC (DO-15) and share identical electrical specs; the "G" solely confirms environmentally compliant materials.