Taiwan Semiconductor Corporation FR156G

Overview

FR156G from Taiwan Semiconductor is a 1.5A, 800V fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 1.5 A, and 50 A surge current capability - used in switching-mode power supplies and DC-DC converters requiring high-efficiency unidirectional conduction.

For engineers reviewing the FR156G datasheet, FR156G pinout, FR156G application, or FR156G equivalent, key selection criteria include its 800 V repetitive peak reverse voltage, thermal resistance of 60 °C/W, AEC-Q101 qualification option (FR156GH), RoHS/halogen-free compliance, and cathode-band polarity marking for reliable board-level integration.

Technical Context

The FR156G employs a glass-passivated silicon junction to achieve fast recovery (500 ns) with low forward voltage drop and minimal reverse leakage (≤5 µA at 25°C). Its single-die construction and DO-204AC package support high-current handling while maintaining thermal stability up to 150°C junction temperature.

Designed for high-frequency switching applications, it delivers low power loss via reduced trr and VF trade-offs versus standard rectifiers, enabling efficient operation in SMPS topologies where reverse recovery energy and switching losses must be tightly controlled.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, glass-passivated, RoHS/halogen-free molding compound (UL 94V-0), pure tin-plated leads, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06U and ES1J, the FR156G offers higher voltage (800 V) and current (1.5 A) ratings in a low-cost axial DO-15 package - making it optimal for cost-sensitive, medium-power industrial and consumer power supplies where 500 ns recovery is acceptable.

Availability

FR156G is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, and automotive body control modules requiring stable component supply, long-lifecycle availability, and traceable green-compliant sourcing.

Supply support for FR156G 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, serving global industrial, computing, and consumer markets since 1979.

The FR15xG series was developed to deliver high-reliability, cost-optimized fast recovery rectifiers for mainstream switching power supplies - balancing speed, voltage rating, thermal performance, and manufacturability in standard axial packages.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the FR156G?

The FR156G has a maximum repetitive peak reverse voltage (V_RRM) of 800 V. This rating is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2105), and defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. It is critical for selecting appropriate input-stage rectifiers in 230 V_AC-derived supplies where peak line voltage reaches ~325 V_DC.

Is the FR156G RoHS and halogen-free compliant?

Yes, the FR156G is RoHS compliant and halogen-free per IEC 61249-2-21. The datasheet explicitly states both compliance attributes under FEATURES and MECHANICAL DATA sections. The molding compound is UL 94V-0 rated, and terminals are pure tin plated - confirming full environmental compliance for modern electronics manufacturing and export requirements.

What is the reverse recovery time (t_rr) of the FR156G, and under what test conditions is it specified?

The FR156G has a reverse recovery time (t_rr) of 500 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the ELECTRICAL SPECIFICATIONS table. This value applies only to the FR156G and FR157G variants within the FR15xG family - other members have lower t_rr (e.g., 150 ns for FR154G).

Does the FR156G have an AEC-Q101 qualified version, and how is it marked?

Yes, the AEC-Q101 qualified version of the FR156G is designated FR156GH. Per the ORDERING INFORMATION section, the "H" suffix indicates AEC-Q101 qualification. It shares identical electrical and thermal specifications with FR156G but undergoes additional stress testing for automotive-grade reliability - including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 standards.

What is the thermal resistance (R_θJA) of the FR156G, and how does it impact PCB layout?

The FR156G has a junction-to-ambient thermal resistance (R_θJA) of 60 °C/W under standard JEDEC test conditions. This value assumes the device is mounted on a 1-inch² copper pad with no thermal vias. In practice, designers should allocate ≥0.5 inch² of 2-oz copper connected to both leads to maintain T_J ≤150°C at full 1.5 A load - especially in enclosed or high-ambient environments.