MASMCJ24CA Equivalent & Substitute Parts

Part Overview

The MASMCJ24CA is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 24V reverse standoff voltage and provides clamping at 38.9V with a peak pulse current rating of 38.6A. The part is currently active in production and maintains military-grade qualification under MIL-PRF-19500. Substitute parts are identified to provide equivalent electrical performance and mechanical compatibility for applications requiring this specific voltage and current protection profile.

Substiute Parts

MASMCJ24CA

Microchip TechnologyIn Stock: 920MASMCJ24CA Datasheet

Current PartRFQ

SMCJ24CA-13

Diodes IncorporatedIn Stock: 3111SMCJ24CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MASMCJ24CA are identified based on electrical parameter equivalence and mechanical compatibility. The critical parameters determining substitution eligibility are:

• Voltage - Reverse Standoff: 24V (nominal)
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Current - Peak Pulse (10/1000µs): 38.6A
• Power - Peak Pulse: 1500W
• Package / Case: DO-214AB (SMC)
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional (1 channel)

Parts meeting these electrical specifications and physical package requirements are classified as direct substitutes. Operating temperature range variations within the specified limits do not preclude substitution eligibility for general-purpose applications.

Parameter Comparison

*The SMCJ24CA-13 operates from -55°C minimum, which is 10°C higher than the MASMCJ24CA. Applications requiring operation below -55°C must use the primary part.

Engineering Selection Recommendations

The SMCJ24CA-13 from Diodes Incorporated provides electrical and mechanical equivalence to the MASMCJ24CA for applications within the -55°C to 150°C operating range. Both parts are RoHS non-compliant and share identical MSL ratings. The MASMCJ24CA maintains active production status with military-grade qualification (MIL-PRF-19500), while the SMCJ24CA-13 is discontinued at DiGi Electronics. Selection between these parts depends on application temperature requirements and supply chain availability. For applications requiring the extended low-temperature performance of -65°C, the MASMCJ24CA is the required choice. For standard industrial applications within -55°C to 150°C, the SMCJ24CA-13 provides equivalent protection characteristics.

Frequently Asked Questions (FAQ)

Q: Can the SMCJ24CA-13 replace the MASMCJ24CA in all applications?

A: The SMCJ24CA-13 provides electrical and mechanical equivalence for applications operating within -55°C to 150°C. Applications requiring operation below -55°C must use the MASMCJ24CA.

Q: Are the package dimensions identical between these parts?

A: Both parts use the DO-214AB (SMC) surface-mount package. Physical dimensions and PCB footprints are identical, enabling direct board-level substitution.

Q: What is the significance of the voltage parameters in substitution?

A: The reverse standoff voltage (24V), breakdown voltage (26.7V minimum), and clamping voltage (38.9V) define the protection threshold. Substitutes must match these values exactly to ensure proper overvoltage suppression in the protected circuit.

Q: Does the current rating difference affect substitution eligibility?

A: Both parts share identical peak pulse current (38.6A) and power dissipation (1500W) ratings. No difference exists in current-handling capability.

Q: Why is the SMCJ24CA-13 listed as discontinued?

A: Discontinuation status reflects supplier inventory decisions and does not indicate technical obsolescence. The part remains electrically and mechanically equivalent to the active MASMCJ24CA.

Q: Are there compliance differences between these parts?

A: Both parts are RoHS non-compliant and REACH unaffected. No compliance advantage exists between the two options.