Taiwan Semiconductor Corporation 1PGSMC5351

Overview

1PGSMC5351 from Taiwan Semiconductor is a 5 W, 14 V nominal Zener diode in DO-214AB (SMC) package, designed for precision voltage regulation and transient suppression in DC/DC converters and SMPS circuits. It features 5% voltage tolerance, 100 Ω dynamic impedance at 3 mA test current, 1 μA leakage at 10.6 V reverse bias, and operates across –55°C to +175°C junction temperature.

For engineers reviewing the 1PGSMC5351 datasheet, 1PGSMC5351 pinout, 1PGSMC5351 application, or 1PGSMC5351 equivalent, key selection criteria include Zener voltage accuracy (13.3–14.7 V), thermal resistance (R_θJL = 20°C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and suitability for automated SMT placement on high-reliability power rails.

Technical Context

The 1PGSMC5351 is a single-die, glass-passivated Zener diode optimized for stable voltage reference and overvoltage clamping in compact surface-mount power systems. Its low-inductance DO-214AB construction supports fast transient response, while JESD201 Class 2 whisker resistance and UL 94V-0 molding compound ensure long-term reliability under thermal cycling and humid environments.

It delivers regulated breakdown at 14 V with ±5% tolerance and maintains low dynamic impedance (100 Ω @ I_ZT = 3 mA), enabling tight regulation in feedback loops of isolated DC/DC converters. The device's 5 W power rating is derated linearly above 75°C ambient per JEDEC test conditions on a 16 mm × 16 mm Cu pad.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode indicated by band. Matte tin-plated leads, solderable per J-STD-002, MSL Level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMCJ14A and 1N5348B, the 1PGSMC5351 offers superior voltage accuracy (±5% vs. TVS tolerance or older Zener spread), smaller DO-214AB footprint, and lower thermal resistance-making it optimal for modern high-density, high-efficiency DC/DC feedback and clamping roles.

Availability

1PGSMC5351 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for 1PGSMC5351 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, specializing in power management, protection, and signal conditioning devices.

The 1PGSMC series is part of TSC's high-reliability Zener diode product line, engineered specifically for precision voltage reference and robust transient suppression in industrial-grade power conversion systems.

FAQ

What is the nominal Zener voltage of the 1PGSMC5351?

The 1PGSMC5351 has a nominal Zener voltage of 14 V, with a guaranteed range of 13.3 V to 14.7 V at 3 mA test current (±5% tolerance). This value is confirmed in the Electrical Specifications table of the official TSC datasheet Version D2102 and applies strictly under TA = 25°C conditions. The 1PGSMC5351 achieves this regulation via a single-die, glass-passivated junction optimized for stability across temperature and time.

Is the 1PGSMC5351 suitable for automated SMT assembly?

Yes, the 1PGSMC5351 is explicitly designed for automated placement, as stated in its FEATURES section. Its DO-214AB (SMC) package, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 rating allow direct use in standard reflow processes without dry-pack or baking. The 1PGSMC5351's low-inductance structure and polarity band also support high-yield pick-and-place and AOI inspection in volume production.

What is the maximum power dissipation of the 1PGSMC5351 and how is it derated?

The 1PGSMC5351 has a maximum DC power dissipation of 5 W at lead temperature (T_L) = 75°C, measured on a 16 mm × 16 mm Cu pad test board. Above 75°C, power must be linearly derated at 40 mW/°C (per the Absolute Maximum Ratings table), reaching zero at 175°C. This derating curve is defined in Figure 1 (Steady State Power Derating) of the 1PGSMC5351 datasheet and reflects real-world thermal behavior on standard PCB layouts.

Does the 1PGSMC5351 meet halogen-free and RoHS requirements?

Yes, the 1PGSMC5351 is RoHS Compliant and halogen-free per IEC 61249-2-21, as documented in the FEATURES section of the official TSC datasheet. The molding compound contains no brominated or chlorinated flame retardants, and all homogeneous materials comply with EU Directive 2011/65/EU. These certifications apply to the full 1PGSMC5348–1PGSMC5369 family, including the 1PGSMC5351.

What is the Zener impedance of the 1PGSMC5351 and why does it matter?

The 1PGSMC5351 exhibits a dynamic Zener impedance (Z_ZT) of 100 Ω at I_ZT = 3 mA, as specified in the Electrical Specifications table. This low impedance ensures minimal voltage deviation under changing load or current conditions-critical for maintaining accuracy in feedback networks of DC/DC converters. Lower Z_ZT directly improves regulation tightness, especially when used with TL431 or optocoupler-based control loops.