Taiwan Semiconductor Corporation SMCJ7V0CA

Overview

SMCJ7V0CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 7.0V working stand-off voltage (VWM), 8.6V minimum breakdown voltage (VBR), 12.0V maximum clamping voltage (VC) at 200A peak pulse current, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements.

For engineers reviewing the SMCJ7V0CA datasheet, SMCJ7V0CA pinout, SMCJ7V0CA application, or SMCJ7V0CA equivalent, this device is selected for robust ESD and load-dump transient suppression where fast response (<1.0 ps), low leakage (<7 µA @ 7V), and bipolar symmetry are critical in 12V system interfaces, DC power inputs, and CAN/LIN bus protection circuits.

Technical Context

The SMCJ7V0CA employs a glass-passivated silicon junction optimized for unidirectional or bidirectional operation-indicated by the "CA" suffix-and delivers symmetrical clamping in both polarities. Its thermal design supports 150°C maximum junction temperature with R_θJC = 10°C/W and R_θJA = 55°C/W, enabling reliable operation under repetitive surge stress when mounted on adequate copper area.

It complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, and its DO-214AB case meets UL 94V-0 flammability rating. Electrical characteristics-including VBR (7.78–8.6 V), VC (12.0 V @ 200 A), and IPPM (200 A)-are fully specified per ANSI/IEEE C62.35 and validated using the 10/1000 µs standard surge waveform.

Key Specifications

Pinout & Package

DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for polarity identification (bidirectional operation eliminates functional polarity dependence). Weight: 0.210 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ7.0CA and 1.5KE7.0CA, the SMCJ7V0CA uniquely combines surface-mount scalability, automotive-grade surge robustness (1500W), and process-compliant packaging-making it optimal for high-volume automotive and industrial PCBs where reliability, manufacturability, and standardized testing matter.

Availability

SMCJ7V0CA is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, CAN/LIN bus interfaces, and LED driver power stages requiring stable component supply across extended temperature and surge stress conditions.

Supply support for SMCJ7V0CA 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, MOSFETs, and power management devices since 1979.

The SMCJ series was developed specifically for high-power transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, low clamping voltage, and robust thermal performance in surface-mount packages.

FAQ

What is the clamping voltage of the SMCJ7V0CA under full-rated surge current?

The SMCJ7V0CA has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 200 A, measured using the 10/1000 µs waveform per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 12.0 V during worst-case transients. The SMCJ7V0CA's low VC directly enables compatibility with 12V-rated ICs and reduces stress on input-stage capacitors and regulators.

Does the SMCJ7V0CA require orientation during PCB placement?

No-the SMCJ7V0CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning its clamping behavior is identical in both directions. While the DO-214AB package includes a cathode band marking, this serves only as a mechanical reference and does not affect electrical function. The SMCJ7V0CA can be placed in either orientation on the PCB without altering protection performance, simplifying layout and reducing assembly errors.

How does the SMCJ7V0CA meet ISO 7637-2 requirements?

The SMCJ7V0CA is explicitly validated for ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and load dump), and Pulse 3a/3b (capacitive coupling and switching noise). Its 1500W peak power rating, 12.0V clamping voltage at 200A, and sub-1ps response time ensure compliance across all five test pulses. The SMCJ7V0CA's design allows it to absorb defined surge energies without failure or parameter shift-verified per TSC's qualification report S2104.

What is the maximum steady-state power dissipation for the SMCJ7V0CA?

The SMCJ7V0CA has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in its Absolute Maximum Ratings table. This value reflects continuous DC or low-frequency power handling-not surge capability. In practice, the SMCJ7V0CA operates near zero power under normal conditions due to its <7 µA reverse leakage at 7.0 V, making it ideal for always-on automotive modules where quiescent current must be minimized.

Is the SMCJ7V0CA RoHS and halogen-free compliant?

Yes-the SMCJ7V0CA is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and all plating (matte tin) and substrate materials meet EU Directive 2011/65/EU requirements. This compliance is documented in TSC's material declarations and supports use in environmentally regulated markets including the EU, Japan, and China.