SMCJ40CA-M3/57T Equivalent & Substitute Parts

Part Overview

The SMCJ40CA-M3/57T is a 40V reverse standoff transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener TVS diode is designed for general-purpose transient protection applications in surface mount configurations. The part operates across a temperature range of -55°C to 150°C and is RoHS3 compliant with MSL 1 rating. Active product status ensures continued availability and support for new designs and production requirements.

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AB (SMC) package family.

Substiute Parts

SMCJ40CA-M3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 1336SMCJ40CA-M3/57T Datasheet

Current PartRFQ

SMCJ40CA-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 34393SMCJ40CA-E3/57T Datasheet

DirectRFQ

SMCJ40CA

MDDIn Stock: 80210SMCJ40CA Datasheet

DirectRFQ

SMCJ40CA

MDDIn Stock: 80210SMCJ40CA Datasheet

DirectRFQ

SMCJ40CA

MDDIn Stock: 80210SMCJ40CA Datasheet

DirectRFQ

5.0SMDJ40CA

MDE Semiconductor IncIn Stock: 53915.0SMDJ40CA Datasheet

MFR RecommendedRFQ

SMCJ40CA-13-F

Diodes IncorporatedIn Stock: 2024SMCJ40CA-13-F Datasheet

MFR RecommendedRFQ

SMCJ40CA-TR

STMicroelectronicsIn Stock: 10315SMCJ40CA-TR Datasheet

MFR RecommendedRFQ

SMLJ40CA

Bourns Inc.In Stock: 20328SMLJ40CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ40CA-M3/57T are qualified based on the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - Reverse Standoff (Typ): 40V
• Voltage - Breakdown (Min): 44.4V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Type: Zener, Bidirectional

Mechanical Parameters (Required for Compatibility):

• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount

Environmental & Compliance Parameters:

• Operating Temperature Range: -55°C to 150°C minimum
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Parts are grouped into two categories: direct equivalents (identical electrical and mechanical specifications) and manufacturer-recommended alternatives (same voltage class and package with variations in peak pulse current or clamping voltage within acceptable ranges).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Pin-for-Pin Compatible):

SMCJ40CA-E3/57T (Vishay General Semiconductor) and SMCJ40CA-13-F (Diodes Incorporated) are direct electrical and mechanical equivalents. Both maintain identical voltage specifications (40V reverse standoff, 64.5V clamping) and peak pulse current ratings (23.3A and 23.2A respectively). Both are RoHS3 compliant with active product status and operate across the full -55°C to 150°C temperature range.

Functional Equivalents with Enhanced Performance:

5.0SMDJ40CA (MDE Semiconductor Inc) and SMLJ40CA (Bourns Inc.) maintain identical voltage parameters but provide increased peak pulse current handling (77.6A and 46.4A respectively) and higher power dissipation (5000W and 3000W). These parts are suitable for applications requiring greater transient energy absorption while maintaining the same voltage protection threshold.

Voltage Clamping Variant:

SMCJ40CA-TR (STMicroelectronics) maintains the 40V reverse standoff specification but exhibits higher clamping voltage (84V) and significantly higher peak pulse current (119A). This part is suitable only for applications where the higher clamping voltage is acceptable.

Lower Temperature Limit Consideration:

SMCJ40CA (MDD) operates with a minimum temperature of -50°C rather than -55°C. This part is suitable for applications where the -50°C lower limit is sufficient.

All substitute parts maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SMCJ40CA-E3/57T be used as a direct replacement for SMCJ40CA-M3/57T?

A: Yes. Both parts are manufactured by Vishay General Semiconductor with identical electrical specifications (40V reverse standoff, 64.5V clamping, 23.3A peak pulse current) and mechanical compatibility in the DO-214AB SMC package. The difference in part number suffix reflects packaging or tape configuration variants only.

Q: What is the difference between SMCJ40CA-M3/57T and 5.0SMDJ40CA?

A: Both maintain identical voltage protection parameters (40V reverse standoff, 64.5V clamping). The 5.0SMDJ40CA provides higher peak pulse current (77.6A vs 23.3A) and power dissipation (5000W vs 1500W). Selection depends on transient energy requirements in the application circuit.

Q: Is SMCJ40CA-TR compatible with SMCJ40CA-M3/57T?

A: Both parts share the same 40V reverse standoff voltage and DO-214AB SMC package. However, SMCJ40CA-TR exhibits higher clamping voltage (84V vs 64.5V) and peak pulse current (119A vs 23.3A). Substitution is valid only if the application circuit tolerates the higher clamping voltage.

Q: Why does SMCJ40CA (MDD) show -50°C minimum operating temperature instead of -55°C?

A: The MDD variant has a narrower operating temperature range (-50°C to 150°C) compared to the original part (-55°C to 150°C). This part is suitable for applications where -50°C minimum temperature is acceptable. For applications requiring -55°C operation, use Vishay, Diodes Incorporated, STMicroelectronics, or Bourns variants.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard PCB assembly and storage protocols.

Q: What packaging options are available for these TVS diodes?

A: All listed parts use the DO-214AB (SMC) surface mount package. Packaging format variants (Tape & Reel, Cut Tape, Digi-Reel) are available from different manufacturers but do not affect electrical or mechanical compatibility.