SMCJ150 Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The SMCJ150 is a unidirectional Zener transient voltage suppressor diode designed for general-purpose overvoltage protection applications. The original Littelfuse SMCJ150 part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. Substitute parts maintain the core electrical specifications while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	150	V
Voltage - Breakdown (Min)	158.4 - 167	V
Voltage - Clamping (Max) @ Ipp	243 - 268	V
Current - Peak Pulse (10/1000µs)	5.6 - 12.4	A
Power - Peak Pulse	1500 - 3000	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

Voltage - Reverse Standoff (Typ): 150V (all substitutes match)
Package / Case: DO-214AB, SMC (all substitutes match)
Mounting Type: Surface Mount (all substitutes match)
Type: Zener, Unidirectional (all substitutes match)

Secondary Electrical Parameters (Allowable Variation):

Voltage - Breakdown (Min): 158.4V to 167V range
Voltage - Clamping (Max) @ Ipp: 243V to 268V range
Current - Peak Pulse: 5.6A to 12.4A range
Power - Peak Pulse: 1500W to 3000W range

Compliance & Status:

RoHS3 Compliant (all parts)
Moisture Sensitivity Level 1 (all parts)
Product Status: Active (all substitutes; original is Obsolete)

All substitute parts maintain electrical compatibility within the specified parameter ranges while offering active manufacturing status from multiple suppliers.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Package
SMCJ150	Littelfuse Inc.	150V	158.4V	255.15V	6.2A	1500W	-55 to 150°C	Obsolete	DO-214AB (SMCJ)
SMCJ150A	Fairchild Semiconductor	150V	167V	243V	6.2A	1500W	-55 to 150°C	Active	SMC (DO-214AB)
SMCJ150A-13-F	Diodes Incorporated	150V	167V	243V	6.2A	1500W	-55 to 150°C	Active	SMC
SMCJ150A-M3/57T	Vishay General Semiconductor - Diodes Division	150V	167V	243V	6.2A	1500W	-55 to 150°C	Active	DO-214AB (SMC)
SMCJ150A-M3/9AT	Vishay General Semiconductor - Diodes Division	150V	167V	243V	6.2A	1500W	-55 to 150°C	Active	DO-214AB (SMC)
SMCJ150A-TP	Micro Commercial Co	150V	167V	243V	6.2A	1500W	-55 to 175°C	Active	SMC (DO-214AB)
SMCJ150AE3/TR13	Microchip Technology	150V	167V	243V	6.2A	1500W	-65 to 150°C	Active	DO-214AB (SMCJ)
SMCJ150E3/TR13	Microchip Technology	150V	167V	268V	5.6A	1500W	-65 to 150°C	Active	DO-214AB (SMCJ)
SMLJ150A	Bourns Inc.	150V	167V	243V	12.4A	3000W	-55 to 150°C	Active	SMC (DO-214AB)

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance): SMCJ150A (Fairchild Semiconductor), SMCJ150A-13-F (Diodes Incorporated), SMCJ150A-M3/57T (Vishay), SMCJ150A-M3/9AT (Vishay), and SMCJ150A-TP (Micro Commercial Co) provide direct electrical equivalence with 150V standoff, 243V clamping, and 6.2A peak pulse current. All are RoHS3 compliant and actively manufactured.

Extended Temperature Range Option: SMCJ150A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C compared to the standard 150°C maximum, providing additional thermal margin for high-temperature applications while maintaining identical electrical specifications.

Lower Temperature Range Option: SMCJ150AE3/TR13 and SMCJ150E3/TR13 (Microchip Technology) extend the lower operating temperature to -65°C, suitable for applications requiring enhanced cold-temperature performance.

Higher Current Capability: SMLJ150A (Bourns Inc.) provides doubled peak pulse current (12.4A) and doubled power dissipation (3000W) while maintaining the same 150V standoff and 243V clamping voltage. This part is suitable for applications requiring higher transient energy absorption.

Clamping Voltage Variation: SMCJ150E3/TR13 (Microchip Technology) specifies 268V maximum clamping voltage with reduced peak pulse current (5.6A). This variant is applicable where higher clamping voltage is acceptable and lower current handling is required.

All substitute parts maintain RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating, ensuring compatibility with standard surface-mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SMCJ150A directly replace the obsolete SMCJ150? A: Yes. SMCJ150A from Fairchild Semiconductor, Diodes Incorporated, Vishay, and Micro Commercial Co all provide direct electrical equivalence with identical 150V standoff, 243V clamping, and 6.2A peak pulse specifications. Package and mounting type are identical (DO-214AB, SMC, surface mount).

Q: What is the difference between SMCJ150A and SMLJ150A? A: SMLJ150A (Bourns) provides doubled peak pulse current (12.4A vs 6.2A) and doubled power dissipation (3000W vs 1500W) while maintaining the same voltage ratings. Select SMLJ150A only if your application requires higher transient energy absorption capability.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting standard surface-mount assembly requirements.

Q: What is the difference between SMCJ150AE3/TR13 and SMCJ150E3/TR13? A: SMCJ150AE3/TR13 specifies 243V maximum clamping with 6.2A peak pulse. SMCJ150E3/TR13 specifies 268V maximum clamping with 5.6A peak pulse. Both are Microchip Technology parts with extended lower temperature range (-65°C). Select based on clamping voltage and current requirements.

Q: Does SMCJ150A-TP offer any advantage over other SMCJ150A variants? A: SMCJ150A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C versus the standard 150°C maximum. This provides additional thermal margin for high-temperature environments while maintaining identical electrical specifications.

Q: Are packaging options interchangeable between manufacturers? A: All substitute parts use DO-214AB (SMC) surface-mount package. Packaging designations vary by manufacturer (SMCJ, SMC, or generic DO-214AB) but refer to the same physical package. Verify tape & reel or bulk packaging availability with your supplier for procurement requirements.

Q: What temperature range should I select for my application? A: Standard parts operate -55 to 150°C. SMCJ150A-TP extends to 175°C for high-temperature applications. SMCJ150AE3/TR13 and SMCJ150E3/TR13 extend to -65°C for cold-temperature applications. Select based on your circuit's operating environment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message