Taiwan Semiconductor Corporation 1PGSMC5366

Overview

1PGSMC5366 from Taiwan Semiconductor is a surface-mount 5 W Zener diode with nominal zener voltage 39 V (min 37.05 V, max 40.95 V), 14 mA test current, and 30 Ω dynamic impedance at I_ZT, used for voltage regulation and overvoltage protection in DC/DC converters and LED drivers.

For engineers reviewing the 1PGSMC5366 datasheet, 1PGSMC5366 pinout, 1PGSMC5366 application, or 1PGSMC5366 equivalent, key selection criteria include its DO-214AB (SMC) package, 175 °C max junction temperature, 29.7 V maximum DC zener current, and 0.5 µA leakage at 29.7 V reverse bias.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and line conditions. Its glass-passivated junction ensures long-term stability and low leakage, while the DO-214AB package supports automated placement and delivers 22 °C/W junction-to-case thermal resistance on a 16 mm × 16 mm Cu pad.

Designed for high-reliability power management, it features moisture sensitivity level 1 (per J-STD-020), RoHS and halogen-free compliance (IEC 61249-2-21), and meets JESD 201 Class 2 whisker resistance - critical for industrial and lighting applications requiring extended thermal cycling endurance.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band polarity marking. Weight ≈ 0.210 g. Matte tin-plated leads, solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage regulation applications.

Compared with SMBJ39A and 1N5366B, the 1PGSMC5366 offers optimized SMT manufacturability, tighter regulation (30 Ω Z_ZT), and superior thermal performance on PCB - making it preferred for space-constrained, thermally demanding DC/DC regulation.

Availability

1PGSMC5366 is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and on-board DC/DC converters requiring stable component supply with full traceability and volume scalability.

Supply support for 1PGSMC5366 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 power management and protection markets since 1979.

The 1PGSMC series is part of TSC's high-reliability Zener diode portfolio designed specifically for surface-mount voltage regulation and overvoltage protection in industrial, lighting, and adapter applications demanding tight tolerance, low leakage, and robust thermal performance.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMC5366?

The 1PGSMC5366 has a nominal zener voltage of 39 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 37.05 V and 40.95 V at the specified 14 mA test current (I_ZT). This tolerance is confirmed in the Electrical Specifications table and applies under standard test conditions (T_A = 25 °C).

What package type does the 1PGSMC5366 use, and what are its key mechanical features?

The 1PGSMC5366 uses the DO-214AB (SMC) surface-mount package. Key mechanical features include matte tin-plated leads compliant with J-STD-002, polarity indicated by a cathode band, UL 94V-0 flammability-rated molding compound, and a weight of approximately 0.210 g. It is rated moisture sensitivity level 1 per J-STD-020.

How does the thermal performance of the 1PGSMC5366 support high-power operation?

The 1PGSMC5366 achieves a junction-to-case thermal resistance (R_θJC) of 22 °C/W and junction-to-ambient (R_θJA) of 55 °C/W when mounted on a 16 mm × 16 mm Cu pad. This allows sustained 5 W dissipation at lead temperature ≤75 °C and supports reliable operation up to 175 °C junction temperature - critical for enclosed power systems.

Is the 1PGSMC5366 suitable for RoHS-compliant and halogen-free designs?

Yes, the 1PGSMC5366 is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance attributes are explicitly stated in the FEATURES section of the official datasheet (Version D2102) and verified through TSC's material declarations and manufacturing controls.

What is the maximum DC zener current (I_ZM) for the 1PGSMC5366, and how is it determined?

The maximum DC zener current (I_ZM) for the 1PGSMC5366 is 122 mA. This value is derived from the device's 5 W power rating and nominal 39 V zener voltage (I_ZM = P_D/V_Z ≈ 5 W / 39 V), and is confirmed in the Electrical Specifications table as the upper limit before thermal instability occurs under continuous DC bias.