SMDJ26C Equivalent & Substitute Parts

Part Overview

The SMDJ26C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 26V reverse standoff voltage and provides 3000W peak pulse power dissipation in a DO-214AB (SMC) package. The SMDJ26C is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	26V
Breakdown Voltage (Min)	27.36V
Clamping Voltage (Max) @ Ipp	44.21V
Peak Pulse Current (10/1000µs)	71.3A
Peak Pulse Power	3000W
Bidirectional Channels	1
Operating Temperature Range	-65°C to 150°C
Package / Case	DO-214AB, SMC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SMDJ26C is determined by the following critical parameters:

Reverse Standoff Voltage: Must be 26V (Typ)
Breakdown Voltage (Min): Must be within 27.36V to 28.9V range
Clamping Voltage (Max) @ Ipp: Acceptable range 42.1V to 44.21V
Peak Pulse Current: 35.6A to 71.3A (dependent on power rating)
Peak Pulse Power: 1500W to 3000W (dependent on current rating)
Package: DO-214AB / SMC form factor
Bidirectional Channels: 1 channel
Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on power dissipation capability:

Category A (3000W Rating): SMDJ26CA, SMC3K26CA-M3/57, SMC3K26CA-M3/9A, SMC3K26CAHM3/57, SMC3K26CAHM3/9A, SMLJ26CA

Category B (1500W Rating): SMCJ26CA, SMCJ26CA-TP, SMCJ26CAE3/TR13

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage	Breakdown Voltage (Min)	Clamping Voltage (Max)	Peak Pulse Current	Peak Pulse Power	Operating Temp Range	Package	Product Status
SMDJ26C	Littelfuse	26V	27.36V	44.21V	71.3A	3000W	-65°C to 150°C	DO-214AB	Obsolete
SMDJ26CA	Alpha & Omega Semiconductor Inc.	26V	28.9V	42.1V	71.3A	3000W	-55°C to 150°C	DO-214AB	Active
SMC3K26CA-M3/57	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	71.3A	3000W	-55°C to 150°C	DO-214AB	Active
SMC3K26CA-M3/9A	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	71.3A	3000W	-55°C to 150°C	DO-214AB	Active
SMC3K26CAHM3/57	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	71.3A	3000W	-55°C to 150°C	DO-214AB	Active
SMC3K26CAHM3/9A	Vishay General Semiconductor - Diodes Division	26V	28.9V	42.1V	71.3A	3000W	-55°C to 150°C	DO-214AB	Active
SMCJ26CA	EVVO Semi	26V	28.9V	42.1V	35.7A	1500W	-55°C to 150°C	DO-214AB	Active
SMCJ26CA-TP	Micro Commercial Co	26V	28.9V	42.1V	35.7A	1500W	-55°C to 175°C	DO-214AB	Active
SMCJ26CAE3/TR13	Microchip Technology	26V	28.9V	42.1V	35.6A	1500W	-65°C to 150°C	DO-214AB	Active
SMLJ26CA	Bourns Inc.	26V	28.9V	42.1V	71.2A	3000W	-55°C to 150°C	DO-214AB	Active

Engineering Selection Recommendations

For 3000W Applications (Direct Replacement)

SMDJ26CA, SMLJ26CA, SMC3K26CA-M3/57, SMC3K26CA-M3/9A, SMC3K26CAHM3/57, and SMC3K26CAHM3/9A maintain the full 3000W peak pulse power rating and 71.3A peak pulse current of the original SMDJ26C. All are ROHS3 compliant and actively manufactured. The Vishay SMC3K26CAHM3/57 and SMC3K26CAHM3/9A variants include AEC-Q101 automotive qualification for applications requiring automotive-grade components.

For 1500W Applications (Reduced Power Rating)

SMCJ26CA, SMCJ26CA-TP, and SMCJ26CAE3/TR13 operate at half the power dissipation (1500W) with correspondingly reduced peak pulse current (35.6A to 35.7A). These parts are suitable for applications where the lower power rating meets circuit requirements. SMCJ26CA-TP extends the operating temperature range to 175°C. SMCJ26CAE3/TR13 maintains the original -65°C lower temperature limit.

All substitute parts are ROHS3 compliant and actively produced, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use a 1500W rated part (SMCJ26CA series) as a direct replacement for the 3000W SMDJ26C?

A: Only if your circuit design requires no more than 1500W peak pulse power dissipation. The 1500W parts have identical voltage parameters (26V standoff, 42.1V clamping) but lower current handling (35.6A to 35.7A versus 71.3A). Verify your application's actual transient energy requirements before substitution.

Q: What is the difference between SMCJ26CA and SMCJ26CA-TP?

A: Both are 1500W rated parts from different manufacturers (EVVO Semi versus Micro Commercial Co). SMCJ26CA-TP extends the maximum operating temperature to 175°C compared to 150°C for SMCJ26CA. Electrical parameters are identical.

Q: Are the Vishay SMC3K26CAHM3/57 and SMC3K26CAHM3/9A suitable for automotive applications?

A: Yes. Both variants carry AEC-Q101 automotive qualification and maintain 3000W power rating with 71.3A peak pulse current. They are suitable for automotive-grade transient voltage suppression.

Q: Does the SMDJ26C operate at lower temperatures than its substitutes?

A: The SMDJ26C operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C. SMCJ26CAE3/TR13 matches the -65°C lower limit. If your application requires operation below -55°C, select SMCJ26CAE3/TR13 or verify that the -55°C minimum of other substitutes meets your requirements.

Q: Are all substitute parts available in tape and reel packaging?

A: Most substitutes are available in tape and reel (TR) packaging. SMCJ26CA from EVVO Semi is available in cut tape (CT) and Digi-Reel format. Confirm packaging availability with your supplier for production requirements.

Q: What is the significance of the different part number suffixes (M3/57, M3/9A, HM3/57, HM3/9A)?

A: These suffixes indicate different tape and reel configurations and manufacturing codes from Vishay. The electrical specifications remain identical across all variants. Selection depends on your procurement and assembly equipment compatibility.

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