Taiwan Semiconductor Corporation P6SMB180

Overview

P6SMB180 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 146 V, breakdown voltage range of 162–198 V, and clamping voltage of 258 V at 2.4 A peak pulse current. It features DO-214AA (SMB) packaging, glass-passivated junction, and is designed for surge protection in switching mode power supplies and consumer electronics.

For engineers reviewing the P6SMB180 datasheet, P6SMB180 pinout, P6SMB180 application, or P6SMB180 equivalent, key selection criteria include its 600 W peak pulse power rating, 1.0 mA test current, <1 µA reverse leakage at 146 V, 10 °C/W junction-to-case thermal resistance, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transients.

Technical Context

The P6SMB180 operates as a unidirectional avalanche diode, clamping transient overvoltages above its breakdown threshold while maintaining low leakage below 146 V. Its fast response time (<1.0 ps from 0 V to V_BR(min)) ensures protection against nanosecond-scale ESD and lightning-induced surges.

Thermally, it supports operation from –55 °C to +150 °C with a maximum steady-state power dissipation of 3 W at 25 °C ambient, derated per Fig.2. The device uses a single-die configuration in a moisture-sensitive level 1 package compliant with J-STD-020.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ180A and 1.5SMC180A, the P6SMB180 delivers optimal balance of 600 W surge capacity, 258 V clamping, and DO-214AA footprint-making it ideal for cost-sensitive, space-limited DC power rails where unidirectional protection suffices and thermal budget is constrained by R_θJC = 10 °C/W.

Availability

P6SMB180 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel display power boards requiring stable component supply and consistent surge performance across production batches.

Supply support for P6SMB180 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 TVS diodes, rectifiers, and protection devices since 1979.

The P6SMB180 belongs to TSC's P6SMB series of 600 W surface-mount TVS diodes, engineered for robust transient immunity in consumer, computing, and industrial power conversion systems with strict size and thermal constraints.

FAQ

What is the maximum clamping voltage of the P6SMB180 under standard surge conditions?

The P6SMB180 has a maximum clamping voltage (V_C) of 258 V when subjected to its rated peak pulse current of 2.4 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during transient events. The P6SMB180 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.

Is the P6SMB180 suitable for automotive applications?

Yes, the P6SMB180 meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for 12 V and 24 V automotive subsystems such as infotainment power supplies and body control modules. Its DO-214AA package, moisture sensitivity level 1, and –55 °C to +150 °C junction temperature range align with AEC-Q101 stress test expectations-though formal qualification requires separate validation by the end user.

How does the P6SMB180 differ from the P6SMB180A variant?

The P6SMB180 has a breakdown voltage range of 162–198 V and marking code NQJ, while the P6SMB180A specifies 171–189 V and marking code NRJ. The A-suffix version offers tighter V_BR tolerance (±5.5% vs ±11%), resulting in more predictable clamping onset. Both share identical V_WM (146 V), V_C (258 V), and package; the P6SMB180A is preferred where precise voltage threshold control is critical.

What is the reverse leakage current specification for the P6SMB180 at its standoff voltage?

The P6SMB180 exhibits a maximum reverse leakage current (I_D) of 1 µA when biased at its standoff voltage (V_WM) of 146 V and tested at 25 °C. This ultra-low leakage minimizes power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. The P6SMB180 maintains <5 µA leakage up to 150 °C per thermal derating curves.

Can the P6SMB180 be used in bidirectional configurations?

No-the P6SMB180 is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications (e.g., AC lines or floating signals), use the CA-suffixed variant P6SMB180CA or the SMBJ180A. Attempting to use the P6SMB180 in reverse-biased AC operation risks catastrophic failure due to lack of symmetric avalanche characteristics.