Taiwan Semiconductor Corporation 1.5SMC62C

Overview

1.5SMC62C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 62V breakdown voltage (min 55.8V, max 68.2V), 1500W peak pulse power rating, 89.0V maximum clamping voltage at 17A, DO-214AB (SMC) package, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.

For engineers reviewing the 1.5SMC62C datasheet, 1.5SMC62C pinout, 1.5SMC62C application, or 1.5SMC62C equivalent, key selection criteria include bidirectional clamping behavior, 1.0mA test current specification, <1μA leakage at 50.2V working stand-off voltage, thermal resistance (R_θJA = 50°C/W), and compliance with J-STD-020 moisture sensitivity level 1.

Technical Context

The 1.5SMC62C operates as a bidirectional avalanche diode, symmetrically clamping transients above ±55.8V in either polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1μA at V_WM), while fast response time (<1.0ps) enables effective suppression of ESD events per IEC 61000-4-2 and lightning-induced surges per IEC 61000-4-5.

Thermally, it sustains 1500W peak pulse power (10/1000μs waveform) with junction temperature limited to 150°C, supported by R_θJC = 15°C/W and R_θJA = 50°C/W. The DO-214AB package provides mechanical robustness and solderability per J-STD-002, with matte tin-plated leads and UL 94V-0 molding compound.

Key Specifications

Pinout & Package

DO-214AB (SMC) is a two-terminal surface-mount package with cathode band marking for unidirectional variants; the 1.5SMC62C is bidirectional and marked with code "FLJ", with no polarity designation required. Terminals are matte tin-plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1.5SMC62C, SMBJ64CA offers reduced surge capacity and thermal performance due to smaller SMB package, while SMCJ64CA matches its 1500W rating, DO-214AB footprint, and ISO 7637-2 compliance - making it the preferred functional alternative for high-reliability designs.

Availability

1.5SMC62C is available at Aetrix Electronics and suitable for automotive control units, industrial Ethernet switches, consumer USB-C chargers, and telecom DSL modems requiring stable component supply and full compliance with AEC-Q101 stress testing protocols.

Supply support for 1.5SMC62C 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949 certification for automotive-grade products.

The 1.5SMCxxC series is part of TSC's high-power surface-mount TVS platform, engineered specifically for ISO 7637-2-compliant automotive and industrial surge immunity where bidirectional clamping and 1500W pulse handling are mandatory.

FAQ

What does the "C" suffix indicate in 1.5SMC62C?

The "C" suffix in 1.5SMC62C denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., 1.5SMC62A), the 1.5SMC62C has no cathode marking and functions identically across both terminals - essential for protecting AC-coupled or floating circuits such as Ethernet pairs or audio lines.

How does 1.5SMC62C differ from 1.5SMC62A?

The 1.5SMC62A is unidirectional with a defined cathode band and forward voltage (~3.5V), while the 1.5SMC62C is bidirectional with no polarity marking and symmetrical avalanche behavior. Their breakdown voltages overlap (1.5SMC62A: 58.9–65.1V; 1.5SMC62C: 55.8–68.2V), but only the 1.5SMC62C supports clamping of negative-going transients without external circuit inversion.

Is 1.5SMC62C suitable for ISO 16750-2 automotive environment testing?

Yes, 1.5SMC62C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, which are referenced by ISO 16750-2 for electrical load conditions. Its 1500W peak power rating, 89.0V clamping voltage, and 150°C junction rating align with Class III/IV transient immunity levels for 12V and 24V systems - confirmed in Taiwan Semiconductor's S2207 datasheet revision.

What is the maximum PCB trace length recommended for optimal 1.5SMC62C performance?

To preserve sub-nanosecond response, PCB traces to the 1.5SMC62C should be kept under 5mm in length and routed directly between protected node and ground/power plane. Longer paths add inductance that degrades clamping effectiveness - especially critical for ESD events where 1.5SMC62C's <1.0ps intrinsic response must not be compromised by layout parasitics.

Does 1.5SMC62C require derating at elevated ambient temperatures?

Yes, 1.5SMC62C must be derated above 25°C ambient per Figure 2 in the datasheet: power dissipation declines linearly to zero at 150°C. At 85°C ambient, its usable peak pulse power drops to ~900W. Thermal design must account for R_θJA = 50°C/W and ensure copper pour area beneath the DO-214AB package minimizes junction-to-ambient rise during repetitive surge events.