82CNQ030SM

Overview

The SMCJ82CA is a bidirectional transient voltage suppressor diode from the SMCJ series, housed in the DO-214AB surface-mount package. It provides a peak pulse power dissipation of 1500W with a reverse standoff voltage range spanning 5.0V to 440V. The device features a glass-passivated junction for high reliability and low leakage current. It operates with picosecond-level response speeds and maintains tight voltage tolerance within ±5%. Designed for robust protection against transient overvoltage events, it supports both unidirectional and bidirectional configurations across its model lineup.

Feature Summary

• High peak pulse power dissipation capability of 1500W
• Bidirectional configuration for AC or differential line protection
• Glass-passivated junction ensuring high reliability and low leakage
• Picosecond response speed for rapid transient suppression

Applications

• Protection of CAN bus interfaces against electrostatic discharge
• Surge protection for automotive electronic control units
• Transient suppression in industrial communication ports
• Overvoltage protection for IoT device input lines

Procurement Notes

Verify the specific part number suffix to confirm bidirectional functionality, as the 'CA' designation indicates this configuration. Ensure the selected variant matches the required reverse standoff voltage for the target circuit. Confirm compliance with RoHS standards and halogen-free requirements if mandated by project specifications. Cross-reference the DO-214AB footprint dimensions during PCB layout to ensure mechanical compatibility.

Selection Notes

Select based on the system's maximum operating voltage to ensure the reverse standoff voltage exceeds normal line conditions without triggering clamping. Verify that the peak pulse current rating aligns with expected surge profiles. Consider the bidirectional nature for applications involving AC signals or bipolar data lines. Evaluate thermal management requirements given the 1500W pulse power rating in the compact DO-214AB package.

Part Context

This component belongs to the SMCJ series of transient voltage suppressors manufactured by SMC Diode Solutions. The series offers a wide range of standoff voltages from 5.0V to 440V in the DO-214AB package. These devices are engineered for general-purpose ESD and surge protection in consumer, industrial, and automotive electronics requiring reliable clamping performance.

Replacement Considerations

Direct pin-to-pin replacements may include equivalent TVS diodes from manufacturers such as Littelfuse, Bourns, or Onsemi offering similar 1500W SMCJ-series specifications. Verify electrical parameters including breakdown voltage, clamping voltage, and package dimensions before substitution.

FAQ

What does the 'CA' suffix indicate in the part number?

The 'CA' suffix denotes a bidirectional configuration, suitable for protecting AC lines or differential signal pairs where voltage polarity can reverse.

What is the typical response time of this TVS diode?

The device exhibits a response speed in the picosecond range, enabling immediate clamping of fast transient voltage spikes.

Is the junction type glass-passivated?

Yes, the SMCJ series utilizes a glass-passivated junction structure to enhance reliability and minimize leakage current under operating conditions.