Taiwan Semiconductor Corporation 1PGSMC5353

Overview

1PGSMC5353 from Taiwan Semiconductor is a surface-mount 5W Zener diode with nominal zener voltage 16V (min 15.2V, max 16.8V), 75Ω dynamic impedance at 75mA test current, and 12.2V maximum DC zener current rating, used for voltage regulation and overvoltage protection in DC/DC converters and power adapters.

For engineers reviewing the 1PGSMC5353 datasheet, 1PGSMC5353 pinout, 1PGSMC5353 application, or 1PGSMC5353 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (R_θJA = 55°C/W), junction temperature limit (175°C), and DO-214AB package compatibility with automated SMT assembly.

Technical Context

This single-die Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and line conditions. Its glass-passivated junction ensures long-term stability and low leakage (1μA at 12.2V), while low-inductance construction supports fast transient response in switching power supplies.

The device is rated for 5W DC power dissipation at 75°C lead temperature, derating linearly above that point, and features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance - critical for industrial and automotive-grade reliability.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode band marking; two-terminal unidirectional configuration. Leads are matte tin-plated, solderable per J-STD-002, and polarity indicated by visible cathode band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ16A and 1N5348B, the 1PGSMC5353 delivers tighter voltage tolerance (±5%), lower dynamic impedance (75Ω vs. 100Ω/undefined), and optimized SMT thermal performance (R_θJA = 55°C/W), making it preferred for space-constrained, regulation-critical power rails.

Availability

1PGSMC5353 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and on-board DC/DC converters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1PGSMC5353 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 power management and protection markets since 1979.

The 1PGSMC series is designed specifically for high-reliability, surface-mount voltage regulation and transient suppression in industrial power conversion systems, emphasizing thermal robustness, process consistency, and RoHS/halogen-free compliance.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMC5353?

The 1PGSMC5353 has a nominal zener voltage of 16 V with a tolerance of ±5%, corresponding to a minimum value of 15.2 V and maximum of 16.8 V at 75 mA test current. This tight tolerance ensures predictable clamping behavior in feedback networks and voltage reference circuits where regulation accuracy is critical. The 1PGSMC5353 achieves this via glass-passivated junction processing and 100% electrical screening per Taiwan Semiconductor's D2102 specification.

What is the maximum DC zener current rating for the 1PGSMC5353?

The 1PGSMC5353 supports a maximum DC zener current (I_ZM) of 295 mA at its rated 5 W power dissipation and 75°C lead temperature. This value is derived from P_D/V_Z ≈ 5 W / 16 V, adjusted for thermal derating and voltage spread. Engineers must verify actual operating I_Z against this limit under worst-case ambient and PCB thermal conditions to avoid junction overheating beyond 175°C.

Does the 1PGSMC5353 meet RoHS and halogen-free requirements?

Yes, the 1PGSMC5353 complies with EU RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Taiwan Semiconductor confirms this in Version D2102 documentation, and the device carries appropriate marking per regulatory labeling requirements. These certifications make the 1PGSMC5353 suitable for consumer, industrial, and medical-grade equipment where material compliance is mandatory.

What is the thermal resistance from junction to ambient for the 1PGSMC5353?

The 1PGSMC5353 has a junction-to-ambient thermal resistance (R_θJA) of 55°C/W when mounted on a 16 mm × 16 mm copper pad test board, per JEDEC standards. This value assumes standard FR-4 PCB with 1 oz copper; actual R_θJA will increase with smaller pads or thinner copper. The 1PGSMC5353's low R_θJA enables operation near its 175°C T_JMAX limit without external heatsinking in most SMT power designs.

How is polarity indicated on the 1PGSMC5353 package?

Polarity on the 1PGSMC5353 is indicated by a visible cathode band printed on the DO-214AB (SMC) package body. The banded end corresponds to the cathode terminal, which must be connected to the higher-potential node in reverse-bias applications. This marking aligns with industry-standard SMC diode orientation and is verified during automated optical inspection (AOI) in SMT lines using the 1PGSMC5353.