Taiwan Semiconductor Corporation 1PGSMB5936

Overview

1PGSMB5936 from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 30 V, 3 W power rating, 12.5 Ω dynamic impedance at 26 mA test current, and DO-214AA (SMB) package. It operates across -55°C to +175°C junction temperature range and serves as precision voltage reference or overvoltage clamp in DC/DC converters and power adapters.

For engineers reviewing the 1PGSMB5936 datasheet, 1PGSMB5936 pinout, 1PGSMB5936 application, or 1PGSMB5936 equivalent, key selection criteria include its 30 V ±5% zener tolerance, 22.8 V minimum clamping voltage at 50 mA, low 21 °C/W junction-to-lead thermal resistance, and RoHS/halogen-free compliance for industrial power designs.

Technical Context

This single-die Zener diode uses photo-glass passivated junction technology to ensure stable breakdown characteristics and low leakage. Its DO-214AA (SMB) package supports automated placement and delivers 3 W steady-state dissipation when mounted on a 10 mm × 10 mm copper pad.

The device exhibits 12.5 Ω zener impedance at 26 mA test current and maintains ≤0.25 μA leakage at 22.8 V reverse bias. Thermal performance is characterized by 59 °C/W junction-to-ambient resistance under standard PCB mounting conditions.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ30A and 1N5357B, the 1PGSMB5936 offers tighter 5% V_Z tolerance, lower 12.5 Ω impedance, and SMB package compatibility - making it optimal for space-constrained, precision-regulated SMT power supplies where stable DC reference matters more than peak surge handling.

Availability

1PGSMB5936 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for 1PGSMB5936 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 semiconductor manufacturer specializing in discrete power devices, including Zener, TVS, rectifier, and MOSFET products.

The 1PGSMB59xx series targets cost-sensitive, high-reliability power management applications-designed specifically for surface-mount voltage regulation and clamping in consumer, industrial, and lighting power systems.

FAQ

What is the nominal zener voltage and tolerance of 1PGSMB5936?

The 1PGSMB5936 has a nominal zener voltage of 30 V with a tolerance of ±5%, measured at 26 mA test current and 25°C ambient temperature. This corresponds to a guaranteed breakdown range of 28.5 V to 31.5 V. The 1PGSMB5936 achieves this specification using photo-glass passivated junction technology for stable long-term performance.

What is the maximum DC zener current (I_ZM) for 1PGSMB5936?

The maximum DC zener current for 1PGSMB5936 is 50 mA, defined as the current at which the device reaches its rated 3 W power dissipation under specified thermal conditions. This value is derived from the 22.8 V minimum clamping voltage and ensures safe operation within thermal limits. The 1PGSMB5936 must be used with appropriate current limiting to avoid exceeding this rating.

Does 1PGSMB5936 meet RoHS and halogen-free requirements?

Yes, the 1PGSMB5936 is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability standards, and its matte tin-plated leads satisfy J-STD-002 solderability requirements. These certifications are confirmed in Taiwan Semiconductor's official documentation for the 1PGSMB59xx family, including the 1PGSMB5936 variant.

What is the thermal resistance from junction to ambient (R_θJA) for 1PGSMB5936?

The junction-to-ambient thermal resistance (R_θJA) for 1PGSMB5936 is 59 °C/W when mounted on a standard 10 mm × 10 mm copper pad PCB. This value assumes natural convection cooling and defines the temperature rise above ambient per watt dissipated. The 1PGSMB5936 leverages its DO-214AA package geometry and low R_θJL (21 °C/W) to achieve this thermal performance.

How is polarity indicated on the 1PGSMB5936 package?

Polarity on the 1PGSMB5936 is indicated by a cathode band printed on the body of the DO-214AA (SMB) package. The banded end corresponds to the cathode terminal, while the opposite end is the anode. This marking aligns with industry-standard diode polarity conventions and is visible under standard optical inspection during SMT placement verification.