Taiwan Semiconductor Corporation 1PGSMB5929

Overview

1PGSMB5929 from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 15 V (min 14.25 V, max 15.75 V), 3 W power dissipation, 25 mA test current, and DO-214AA (SMB) package. It provides precise voltage regulation in DC/DC converters and SMPS feedback loops under thermal equilibrium at 25°C.

For engineers reviewing the 1PGSMB5929 datasheet, 1PGSMB5929 pinout, 1PGSMB5929 application, or 1PGSMB5929 equivalent, key selection criteria include zener voltage tolerance (±5%), dynamic impedance (9 Ω @ 25 mA), leakage current (1 μA @ 11.4 V), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial power designs.

Technical Context

The 1PGSMB5929 operates as a single-die, unidirectional voltage reference device with photo-glass passivated junction for stable breakdown characteristics. Its low-inductance SMB package supports high-frequency switching environments and automated SMT placement.

Thermal performance is defined by R_θJL = 21°C/W and R_θJA = 59°C/W on a 10 mm × 10 mm Cu pad PCB. The cathode band indicates polarity, and moisture sensitivity level is J-STD-020 Level 1 - requiring no dry-pack handling.

Key Specifications

Pinout & Package

DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode indicated by band, polarity-critical for reverse-bias operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5929B and SMBJ15A, the 1PGSMB5929 uniquely combines SMT-compatible DO-214AA packaging, 3 W continuous dissipation, and ±5% V_Z tolerance - making it optimal for space-constrained, thermally demanding shunt regulation where precision and reliability are critical.

Availability

1PGSMB5929 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting drivers requiring stable component supply with full traceability and lifecycle management.

Supply support for 1PGSMB5929 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 1PGSMB series is part of TSC's high-reliability Zener diode product line, engineered specifically for precision voltage reference and overvoltage protection in compact, high-efficiency power conversion systems.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMB5929?

The 1PGSMB5929 has a nominal zener voltage of 15 V with a tolerance of ±5%, corresponding to a guaranteed range of 14.25 V to 15.75 V at 25°C and 25 mA test current. This tolerance is confirmed in the Electrical Specifications table and applies to all units in the 1PGSMB5926–1PGSMB5956 family per Version C2102 documentation.

What is the maximum power dissipation and thermal derating behavior of the 1PGSMB5929?

The 1PGSMB5929 has a maximum DC power dissipation of 3 W at lead temperature (T_L) = 75°C, with linear derating above that temperature. Its junction-to-lead thermal resistance is 21°C/W, and junction-to-ambient is 59°C/W when mounted on a 10 mm × 10 mm copper pad - values critical for thermal design validation in compact power modules.

Is the 1PGSMB5929 suitable for automated SMT assembly?

Yes, the 1PGSMB5929 is explicitly designed for automated placement, as stated in its FEATURES section. Its DO-214AA (SMB) package, matte tin-plated leads compliant with J-STD-002, and J-STD-020 Level 1 moisture sensitivity eliminate pre-bake requirements and ensure robust reflow compatibility in high-volume manufacturing.

What is the zener impedance and leakage current specification for the 1PGSMB5929?

The 1PGSMB5929 exhibits a zener impedance (Z_ZT) of 9 Ω at 25 mA test current and leakage current (I_R) of 1 μA maximum at 11.4 V reverse voltage. These parameters are measured per JEDEC standards and directly impact regulation accuracy and standby power loss in feedback circuits.

Does the 1PGSMB5929 meet RoHS and halogen-free requirements?

Yes, the 1PGSMB5929 is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section of the official documentation. The molding compound meets UL 94V-0 flammability rating, and terminals pass JESD 201 Class 2 whisker testing - ensuring suitability for environmentally regulated industrial and consumer applications.