SMCJ15 Equivalent & Substitute Parts

Part Overview

The SMCJ15 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 15V reverse standoff voltage with a 25.62V maximum clamping voltage at peak pulse current of 61.5A, housed in a DO-214AB (SMC) package. The SMCJ15 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives from multiple manufacturers provide equivalent electrical performance with improved availability.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	15	V
Voltage - Breakdown (Min)	15.84	V
Voltage - Clamping (Max) @ Ipp	25.62	V
Current - Peak Pulse (10/1000µs)	61.5	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMCJ15 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 15V (exact match required)
Voltage - Breakdown (Min): 15.84V to 16.7V (acceptable range)
Voltage - Clamping (Max) @ Ipp: 24.4V to 25.62V (acceptable range)
Current - Peak Pulse (10/1000µs): 61.5A minimum
Power - Peak Pulse: 1500W minimum
Package / Case: DO-214AB or DO-214AC (SMC or SMA equivalent)
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Secondary Compatibility Parameters:

Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct electrical equivalents with identical package specifications, and functionally equivalent alternatives with different package designations (SMA vs. SMC) that maintain electrical performance within specified tolerances.

Parameter Comparison

Parameter	SMCJ15 (Littelfuse)	SMCJ15A (EVVO Semi)	SMCJ15A-13-F (Diodes Inc.)	SMCJ15A-M3/57T (Vishay)	SMCJ15A-TP (MCC)	SMCJ15AE3/TR13 (Microchip)	SMLJ15A (Bourns)
Voltage - Reverse Standoff (Typ)	15V	15V	15V	15V	15V	15V	15V
Voltage - Breakdown (Min)	15.84V	16.7V	16.7V	16.7V	16.7V	16.7V	16.7V
Voltage - Clamping (Max) @ Ipp	25.62V	24.4V	24.4V	24.4V	24.4V	24.4V	24.4V
Current - Peak Pulse (10/1000µs)	61.5A	61.5A	61.5A	61.5A	61.5A	61.5A	123A
Power - Peak Pulse	1500W	600W	1500W	1500W	1500W	1500W	3000W
Operating Temperature Range	-55 to 150°C	-65 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 175°C	-65 to 150°C	-55 to 150°C
Package / Case	DO-214AB, SMC	DO-214AC, SMA	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Package Equivalents (DO-214AB SMC):

SMCJ15A-13-F (Diodes Incorporated), SMCJ15A-M3/57T (Vishay), SMCJ15A-TP (Micro Commercial Co), and SMCJ15AE3/TR13 (Microchip) provide direct mechanical and electrical substitution for the SMCJ15. All maintain the DO-214AB SMC package footprint, 1500W peak pulse power rating, and 61.5A peak pulse current. These parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. Selection among these options depends on packaging format availability (Cut Tape, Tape & Reel, or Digi-Reel) and operating temperature requirements. SMCJ15A-TP extends the upper operating temperature to 175°C, suitable for elevated ambient applications.

Alternative Package Equivalent (DO-214AC SMA):

SMCJ15A (EVVO Semi) provides electrical equivalence with identical voltage and current ratings but uses the DO-214AC SMA package instead of DO-214AB SMC. This part is suitable only if PCB layout accommodates SMA footprint. The 600W peak pulse power rating is lower than the original specification; verify application requirements before selection.

Enhanced Performance Alternative:

SMLJ15A (Bourns Inc.) maintains all primary electrical parameters with doubled peak pulse current (123A) and doubled peak pulse power (3000W). This part is suitable for applications requiring higher transient energy absorption. The DO-214AB SMC package provides direct mechanical compatibility. REACH status is affected; verify regulatory compliance for your application.

Frequently Asked Questions (FAQ)

Q: Can SMCJ15A (EVVO Semi) with DO-214AC SMA package replace the original SMCJ15 in DO-214AB SMC?

A: Electrical substitution is valid; the 15V standoff voltage, 61.5A peak pulse current, and clamping voltage are equivalent. However, the SMA package has a different PCB footprint than SMC. Mechanical compatibility requires PCB redesign or use of adapter solutions. The 600W peak pulse power rating is lower than the original 1500W specification; confirm application transient energy requirements.

Q: What is the difference between SMCJ15A-13-F and SMCJ15A-M3/57T?

A: Both parts are electrically and mechanically identical with 15V standoff voltage, 24.4V clamping voltage, 61.5A peak pulse current, and 1500W peak pulse power in DO-214AB SMC package. The difference is packaging format: SMCJ15A-13-F is supplied in Cut Tape and Digi-Reel formats, while SMCJ15A-M3/57T is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Is SMLJ15A a suitable replacement for SMCJ15?

A: SMLJ15A is electrically compatible with identical 15V standoff voltage and clamping voltage characteristics. The part provides enhanced performance with 123A peak pulse current (versus 61.5A) and 3000W peak pulse power (versus 1500W). This higher rating makes SMLJ15A suitable for applications with greater transient energy. The DO-214AB SMC package provides direct mechanical compatibility. Verify REACH compliance status for your application.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution is determined by: (1) Voltage - Reverse Standoff of 15V, (2) Voltage - Breakdown between 15.84V and 16.7V, (3) Voltage - Clamping between 24.4V and 25.62V, (4) Peak Pulse Current of 61.5A minimum, (5) Peak Pulse Power of 1500W minimum, (6) Surface Mount package (DO-214AB SMC or DO-214AC SMA), (7) Operating temperature range of -55°C to 150°C minimum, and (8) ROHS3 compliance with MSL 1 rating.

Q: Can I use SMCJ15E3/TR13 as a substitute?

A: SMCJ15E3/TR13 has a higher clamping voltage of 26.9V and lower peak pulse current of 55.8A compared to the SMCJ15 specification of 25.62V and 61.5A. While the 15V standoff voltage matches, the different clamping and current characteristics place this part outside the acceptable substitution range for direct replacement. Use only if application requirements specifically allow higher clamping voltage and lower peak pulse current.

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