Taiwan Semiconductor Corporation P4SMA200

Overview

P4SMA200 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 200V breakdown voltage (min 180V, max 220V), and 287V clamping voltage at 1.4A peak impulse current under 10/1000μs waveform. It protects DC power rails in switching mode power supplies and on-board DC/DC converters against ESD and surge events.

For engineers reviewing the P4SMA200 datasheet, P4SMA200 pinout, P4SMA200 application, or P4SMA200 equivalent, key selection criteria include its 162V working stand-off voltage, <1μA reverse leakage at VWM, 150°C maximum junction temperature, fast sub-1ps response time, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive-level transient immunity.

Technical Context

The P4SMA200 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transients. Its glass-passivated junction ensures stable VBR tolerance (±10% for standard, ±5% for 'A' variant) and low leakage (<1μA at 162V). It is not bidirectional-no C or CA suffix-and requires cathode-band orientation during PCB layout.

Thermal derating begins above 25°C ambient per Fig.2, with full 400W capability only at TA ≤25°C; at 125°C, rated peak power drops to ~200W. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, supporting lead-free reflow without preconditioning.

Key Specifications

Pinout & Package

DO-214AC (SMA) surface-mount package with molded epoxy case (UL 94V-0), matte tin-plated leads, and polarity indicated by cathode band. Weight: 0.060g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with SMBJ200A and 1.5SMC200A, the P4SMA200 offers optimal balance of compact DO-214AC footprint, precise 287V clamping, and verified ISO 7637-2 compliance - making it preferred for space-constrained automotive and industrial DC/DC designs where exact voltage margin is critical.

Availability

P4SMA200 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 traceability from Taiwan Semiconductor's qualified wafer fab and assembly sites.

Supply support for P4SMA200 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, including TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949-certified automotive production lines.

The P4SMA series was designed specifically for high-reliability, surface-mount transient suppression in automotive and industrial power systems - emphasizing low leakage, tight V_BR tolerance, and robust surge immunity per ISO 7637-2.

FAQ

What is the breakdown voltage range for P4SMA200?

The P4SMA200 has a guaranteed breakdown voltage range of 180V to 220V at 1.0mA test current, per its electrical specifications table. This ±10% tolerance reflects production variation and ensures reliable clamping onset across all units. The P4SMA200 must be selected only when system overvoltage thresholds align with this window - e.g., protecting a 162V nominal rail where 180V V_BR provides adequate margin above V_WM.

Is P4SMA200 bidirectional or unidirectional?

The P4SMA200 is unidirectional - it features a cathode band and conducts only in reverse bias above V_BR. Bidirectional variants require the 'C' or 'CA' suffix (e.g., P4SMA200C). Using the unidirectional P4SMA200 on an AC line or floating signal without polarity awareness risks failure; always orient the cathode toward the higher-potential side of the protected node.

What is the clamping voltage of P4SMA200 under standard surge conditions?

The P4SMA200 clamps to a maximum of 287V when subjected to a 10/1000μs waveform with peak current of 1.4A. This value is measured per ANSI/IEEE C62.35 and defines the highest voltage imposed on the protected circuit during a standardized surge event. Designers must ensure downstream components have sufficient voltage headroom above 287V - for example, selecting 300V-rated capacitors or MOSFETs.

Does P4SMA200 meet automotive transient standards?

Yes, the P4SMA200 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical disturbances. Its 400W peak power rating, fast <1ps response, and low leakage enable direct integration into BCM, lighting, and infotainment power rails without supplemental filtering. However, it does not cover Pulse 5 (load dump), which requires higher-energy devices like the 1.5SMC200A.

What package type does P4SMA200 use and what are its mounting considerations?

The P4SMA200 uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads compatible with J-STD-002 soldering. Its 0.060g weight and UL 94V-0 molding compound support automated placement and lead-free reflow. PCB layout must observe the manufacturer's suggested pad dimensions and maintain cathode-band orientation - incorrect polarity results in open-circuit behavior during transients.