Taiwan Semiconductor Corporation 1PGSMB5954

Overview

1PGSMB5954 from Taiwan Semiconductor is a surface-mount 160 V nominal Zener diode in DO-214AA (SMB) package, rated for 3 W total power dissipation, with 5% voltage tolerance, 2.3 mA test current, and 6500 Ω dynamic impedance at 0.1×DC test current - used for precision voltage regulation in DC/DC converters and SMPS feedback loops.

For engineers reviewing the 1PGSMB5954 datasheet, 1PGSMB5954 pinout, 1PGSMB5954 application, or 1PGSMB5954 equivalent, key selection criteria include its 160 V nominal Zener voltage, low leakage (<1 μA at 121.6 V), 175 °C maximum junction temperature, and SMB package compatibility with automated SMT assembly.

Technical Context

The 1PGSMB5954 operates as a single-die, unidirectional Zener diode with cathode-band polarity indication. Its photo-glass passivated junction ensures stable breakdown characteristics under thermal cycling and humidity exposure, while its low-inductance SMB package supports high-frequency transient suppression in switching regulators.

It delivers regulated reference voltage via reverse-biased operation, with Zener impedance measured at 6500 Ω (AC, 60 Hz, Iz(AC) = 0.1×Iz(DC)), and exhibits 121.6 V maximum DC Zener current limit at 9 mA - enabling robust overvoltage clamping in adapter and lighting control circuits.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, polarity indicated by cathode band, weight ≈ 0.100 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ160A and 1N5379B, the 1PGSMB5954 provides superior voltage regulation accuracy (±5%), lower leakage, and SMB package compatibility with high-volume SMT lines - making it optimal for feedback-critical, space-constrained power designs.

Availability

1PGSMB5954 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, RoHS-compliant sourcing, and halogen-free manufacturing compliance.

Supply support for 1PGSMB5954 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 diodes, TVS, MOSFETs, and rectifiers, with global distribution and AEC-Q200 qualified products.

The 1PGSMB59xx series was designed specifically for high-reliability, surface-mount voltage regulation in compact power conversion systems - emphasizing thermal robustness, moisture resistance, and automated assembly compatibility.

FAQ

What is the nominal Zener voltage of the 1PGSMB5954?

The 1PGSMB5954 has a nominal Zener voltage of 160 V, with a guaranteed range of 152.0 V to 168.0 V at 2.3 mA test current and 25 °C ambient temperature. This ±5% tolerance is specified per the device's marking code P954B and applies across its full operating junction temperature range of –55 °C to +175 °C. The 1PGSMB5954 maintains this voltage stability under defined thermal and current conditions as verified in Taiwan Semiconductor's C2102 datasheet revision.

What package type does the 1PGSMB5954 use?

The 1PGSMB5954 uses the DO-214AA (SMB) surface-mount package, featuring matte tin-plated leads compliant with J-STD-002 solderability standards, UL 94V-0 flammability-rated molding compound, and cathode polarity indicated by a visible band. Its dimensions and pad layout align with IPC-7351B SMB footprint recommendations, supporting high-speed pick-and-place assembly and reflow profiles per J-STD-020 Level 1 moisture sensitivity.

What is the maximum power dissipation rating for the 1PGSMB5954?

The 1PGSMB5954 is rated for 3 W total power dissipation at a lead temperature of 75 °C, with linear derating above that temperature. Its thermal performance includes R_θJL = 21 °C/W (junction-to-lead) and R_θJA = 59 °C/W (junction-to-ambient) when mounted on a 10 mm × 10 mm copper pad per JEDEC test conditions. This enables reliable operation in thermally dense power converter designs without forced cooling.

How does the 1PGSMB5954 compare to standard through-hole Zener diodes like 1N5379B?

The 1PGSMB5954 differs from 1N5379B primarily in package (SMB vs. DO-201AD), power rating (3 W vs. 5 W), and thermal resistance (R_θJA = 59 °C/W vs. ~35 °C/W). While 1N5379B offers higher power handling, the 1PGSMB5954 provides surface-mount compatibility, lower profile, and tighter process control for automated manufacturing - making it preferable for modern compact power modules where board space and assembly efficiency are critical.

Is the 1PGSMB5954 RoHS-compliant and halogen-free?

Yes, the 1PGSMB5954 is RoHS-compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor confirms compliance in Version C2102 of the datasheet, with all materials-including molding compound and lead finish-meeting applicable environmental directives. This makes the 1PGSMB5954 suitable for consumer, industrial, and networking equipment subject to strict chemical content restrictions.