Taiwan Semiconductor Corporation 1PGSMC5348

Overview

1PGSMC5348 from Taiwan Semiconductor is a surface-mount 11 V nominal Zener diode in DO-214AB (SMC) package, rated for 5 W power dissipation, with 10.45–11.55 V zener voltage tolerance at 125 mA test current, 3 Ω dynamic impedance, and 175 °C maximum junction temperature. It serves as a precision voltage reference and overvoltage clamp in DC/DC converters and SMPS feedback loops.

For engineers reviewing the 1PGSMC5348 datasheet, 1PGSMC5348 pinout, 1PGSMC5348 application, or 1PGSMC5348 equivalent, key selection criteria include its 11 V nominal zener voltage, 5 W steady-state power rating, low 3 Ω zener impedance at 125 mA, DO-214AB thermal performance (R_θJL = 20 °C/W), 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 (<1 μA at 8.4 V). Its DO-214AB package enables automated placement and delivers low inductance for high-frequency transient suppression.

The device operates across –55 °C to +175 °C junction temperature range, with thermal resistance values measured on a 16 mm × 16 mm copper pad PCB: R_θJA = 55 °C/W, R_θJC = 22 °C/W, and R_θJL = 20 °C/W - enabling reliable thermal management in compact power stages.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode indicated by a band on the body; 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 1N5348B and SMBZ5242B, the 1PGSMC5348 delivers superior power density (5 W in DO-214AB), lower dynamic impedance (3 Ω), and better thermal resistance (R_θJA = 55 °C/W), making it optimal for miniaturized, high-efficiency power supplies requiring stable 11 V reference or clamping.

Availability

1PGSMC5348 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for 1PGSMC5348 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 industrial, computing, and consumer markets since 1979.

The 1PGSMC series was designed specifically for high-reliability, surface-mount voltage regulation and transient suppression in modern switch-mode power conversion systems, emphasizing thermal robustness, tight tolerance, and automated assembly compatibility.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMC5348?

The 1PGSMC5348 has a nominal zener voltage of 11 V with a tolerance of ±5%, specified as 10.45 V (min) to 11.55 V (max) at 125 mA test current. This tight tolerance is achieved via photo-glass passivation and laser trimming, ensuring stable regulation in feedback circuits. The 1PGSMC5348 maintains this specification across its full operating temperature range of –55 °C to +175 °C.

What is the maximum power dissipation rating for the 1PGSMC5348 and under what conditions?

The 1PGSMC5348 is rated for 5 W maximum DC power dissipation at lead temperature (T_L) = 75 °C, measured on a 16 mm × 16 mm copper pad test board. Derating is required above 75 °C at 33.3 mW/°C. This rating reflects real-world SMT thermal performance - not theoretical die limits - and is validated per JEDEC standards for DO-214AB packages.

Does the 1PGSMC5348 have RoHS and halogen-free compliance documentation?

Yes, the 1PGSMC5348 is fully RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor certifies compliance in its official product change notices and material declarations. The device uses matte tin-plated leads and UL 94V-0 molding compound, with moisture sensitivity level (MSL) 1 - eliminating pre-bake requirements prior to reflow soldering.

What is the zener impedance of the 1PGSMC5348 and why does it matter in circuit design?

The 1PGSMC5348 exhibits a dynamic zener impedance (Z_ZT) of 3 Ω at 125 mA test current. This low value minimizes output voltage variation under changing load currents - critical in precision feedback networks. In practice, it enables tighter regulation (±0.3 V shift for ±100 mA load step) compared to higher-impedance alternatives, directly improving system output accuracy.

Can the 1PGSMC5348 be used as a direct replacement for older 1N5348 series diodes?

The 1PGSMC5348 is not a direct pin-compatible replacement for through-hole 1N5348 variants due to its DO-214AB (SMC) surface-mount package versus DO-201AD. While electrical parameters align closely (11 V V_Z, 5 W rating), PCB layout and thermal interface must be redesigned. For new designs, the 1PGSMC5348 offers superior thermal performance and automation compatibility over 1N5348.