SMCJ13CA-13 Equivalent & Substitute Parts

Part Overview

The SMCJ13CA-13 is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface mount applications. This bidirectional Zener diode features a 13V reverse standoff voltage with a 21.5V maximum clamping voltage and 69.7A peak pulse current capability in a DO-214AB (SMC) package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain the same electrical and mechanical specifications for continued system design and production support.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	13V
Voltage - Breakdown (Min)	14.4V
Voltage - Clamping (Max) @ Ipp	21.5V
Current - Peak Pulse (10/1000µs)	69.7A
Power - Peak Pulse	1500W (1.5kW)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitution of the SMCJ13CA-13 is determined by strict equivalence in the following electrical parameters: reverse standoff voltage (13V), breakdown voltage minimum (14.4V), clamping voltage maximum (21.5V), and package type (DO-214AB/SMC). Substitute parts are grouped into three categories based on peak pulse current rating and power dissipation capability:

Category 1: Direct Electrical Equivalents (69.7A–69.8A, 1500W) Parts maintaining identical peak pulse current and power ratings within manufacturing tolerance.

Category 2: Enhanced Current Rating (139.4A–139.6A, 3000W) Parts with doubled peak pulse current and power capability while maintaining all voltage specifications.

Category 3: High-Current Variants (233A–368A, 5000W) Parts with significantly elevated current handling for demanding protection applications.

All substitute parts maintain the same voltage specifications, surface mount package configuration, and general-purpose application classification as the original SMCJ13CA-13.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Product Status
SMCJ13CA-13	Diodes Incorporated	13V	21.5V	69.7A	1500W	DO-214AB, SMC	Discontinued
SMCJ13CA	Fairchild Semiconductor	13V	21.5V	69.8A	1500W	DO-214AB, SMC	Active
SMCJ13CA-TP	Micro Commercial Co	13V	21.5V	69.8A	1500W	DO-214AB, SMC	Active
SMDJ13CA	Alpha & Omega Semiconductor Inc.	13V	21.5V	139.6A	3000W	DO-214AB, SMC	Active
SMLJ13CA	Bourns Inc.	13V	21.5V	139.4A	3000W	DO-214AB, SMC	Active
5.0SMDJ13CA	MDE Semiconductor Inc	13V	21.5V	233A	5000W	DO-214AB, SMC	Active
5.0SMDJ13CA-T7	Littelfuse Inc.	13V	21.5V	233A	5000W	DO-214AB, SMC	Active
SMCJ13CA-TR	STMicroelectronics	13V	27.2V	368A (8/20µs)	1500W	DO-214AB, SMC	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for Pin-Compatible Substitution): SMCJ13CA (Fairchild Semiconductor) and SMCJ13CA-TP (Micro Commercial Co) provide direct electrical equivalence with peak pulse current of 69.8A and 1500W power rating, matching the original SMCJ13CA-13 specifications. Both parts are in active production status with RoHS3 compliance. SMCJ13CA-TP offers extended operating temperature range to 175°C and tape & reel packaging.

Enhanced Protection (Higher Current Margin): SMDJ13CA (Alpha & Omega Semiconductor Inc.) and SMLJ13CA (Bourns Inc.) maintain identical voltage specifications while providing doubled peak pulse current (139.4A–139.6A) and 3000W power dissipation. These parts are suitable for applications requiring additional transient energy absorption margin. SMLJ13CA offers the highest inventory availability (24,769 pcs) and RoHS3 compliance.

High-Current Applications: 5.0SMDJ13CA (MDE Semiconductor Inc) and 5.0SMDJ13CA-T7 (Littelfuse Inc.) deliver 233A peak pulse current and 5000W power capability for demanding telecom and industrial protection circuits. Both maintain 13V standoff and 21.5V clamping specifications with RoHS3 compliance and extended temperature ranges.

Non-Preferred Alternative: SMCJ13CA-TR (STMicroelectronics) exhibits elevated clamping voltage (27.2V maximum) and higher peak pulse current (368A at 8/20µs pulse), deviating from the original 21.5V clamping specification. This part is suitable only when higher clamping voltage is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can SMCJ13CA directly replace SMCJ13CA-13 without circuit modification? A: Yes. SMCJ13CA from Fairchild Semiconductor and SMCJ13CA-TP from Micro Commercial Co provide direct electrical equivalence with identical voltage ratings (13V standoff, 21.5V clamping) and peak pulse current (69.8A) within manufacturing tolerance. Both use the same DO-214AB (SMC) package and require no circuit changes.

Q: What is the difference between SMDJ13CA and SMLJ13CA? A: Both parts maintain identical voltage specifications (13V standoff, 21.5V clamping) and current rating (139.4A–139.6A). The primary differences are manufacturer (Alpha & Omega vs. Bourns), inventory availability, and compliance certifications. SMLJ13CA offers significantly higher stock levels (24,769 pcs).

Q: Why does SMCJ13CA-TR have a higher clamping voltage (27.2V)? A: SMCJ13CA-TR from STMicroelectronics is a different variant within the SMCJ13 series with modified clamping characteristics. The 27.2V maximum clamping voltage represents a design variation and is not equivalent to the original 21.5V specification. Use only if circuit design permits higher clamping voltage.

Q: Are all substitute parts RoHS3 compliant? A: SMCJ13CA-TP, SMDJ13CA, SMLJ13CA, 5.0SMDJ13CA, and 5.0SMDJ13CA-T7 are RoHS3 compliant. SMCJ13CA (Fairchild) compliance status is not specified in the provided data. SMCJ13CA-TR (STMicroelectronics) is RoHS3 compliant.

Q: What packaging options are available for substitute parts? A: All substitute parts use DO-214AB (SMC) surface mount package. SMCJ13CA-TP, 5.0SMDJ13CA, 5.0SMDJ13CA-T7, and SMCJ13CA-TR are supplied in tape & reel (TR) format for automated assembly. Standard tube or bulk packaging may be available from distributors.

Q: Can I use a higher-current part (SMDJ13CA or 5.0SMDJ13CA) as a drop-in replacement? A: Yes. Higher-current rated parts maintain all voltage specifications and use the same package, providing enhanced transient protection margin. No circuit modification is required. The higher current rating provides additional safety margin without affecting normal circuit operation.

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