SMDJ60C Equivalent & Substitute Parts

Part Overview

The SMDJ60C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. Specified with a 60V reverse standoff voltage and 101.64V maximum clamping voltage at 31A peak pulse current, this component operates across the temperature range of -65°C to 150°C in a DO-214AB (SMC) package. The SMDJ60C is classified as obsolete, necessitating identification of active equivalent parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	60	V
Voltage - Breakdown (Min)	63.18	V
Voltage - Clamping (Max) @ Ipp	101.64	V
Current - Peak Pulse (10/1000µs)	31	A
Power - Peak Pulse	3000	W
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AB, SMC	—
Bidirectional Channels	1	—
Type	Zener	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SMDJ60C is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Matching Criteria:

Reverse standoff voltage: 60V
Package type: DO-214AB (SMC) surface mount
Bidirectional configuration: 1 channel
Zener diode type
RoHS3 compliance

Secondary Compatibility Parameters:

Clamping voltage range: 96.8V to 101.64V maximum
Peak pulse current: 15.5A to 51.7A (dependent on part selection)
Peak pulse power: 1500W to 5000W (dependent on part selection)
Operating temperature: -55°C to 175°C (dependent on part selection)

Substitute parts are grouped into two categories based on electrical performance:

Category A - Direct Electrical Equivalents (31A Peak Pulse Current, 3000W Power): SMDJ60CA, SMLJ60CA, SMLJ60CA-TP, SMLJ60CAE3/TR13, TV30C600JB-G

Category B - Reduced Performance Substitutes (15.5A Peak Pulse Current, 1500W Power): SMCJ60CA, SMCJ60CAE3/TR13

Category C - Enhanced Performance Substitutes (51.7A Peak Pulse Current, 5000W Power): 5.0SMLJ60CA-TP

All substitute parts maintain the 60V reverse standoff voltage, DO-214AB package format, and single-channel bidirectional configuration required for mechanical and electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package	Product Status
SMDJ60C	Littelfuse	60	101.64	31	3000	-65 to 150	DO-214AB	Obsolete
SMDJ60CA	Alpha & Omega Semiconductor Inc.	60	96.8	31	3000	-55 to 150	DO-214AB	Active
SMCJ60CA	Fairchild Semiconductor	60	96.8	15.5	1500	-55 to 150	DO-214AB	Active
5.0SMLJ60CA-TP	Micro Commercial Co	60	96.8	51.7	5000	-55 to 175	DO-214AB	Active
SMLJ60CA	Bourns Inc.	60	96.8	31	3000	-55 to 150	DO-214AB	Active
SMLJ60CA-TP	Micro Commercial Co	60	96.8	31	3000	-55 to 175	DO-214AB	Active
SMLJ60CAE3/TR13	Microchip Technology	60	96.8	31	300	-55 to 150	DO-214AB	Active
SMCJ60CAE3/TR13	Microchip Technology	60	96.8	15.5	1500	-65 to 150	DO-214AB	Active
TV30C600JB-G	Comchip Technology	60	96.8	30.99	3000	-55 to 150	DO-214AB	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: SMDJ60CA (Alpha & Omega Semiconductor Inc.) provides the closest electrical match to the SMDJ60C with identical 31A peak pulse current and 3000W power rating. This part is active, RoHS3 compliant, and maintains the required 60V reverse standoff voltage and DO-214AB package format. The clamping voltage of 96.8V is within acceptable tolerance for general-purpose overvoltage protection applications.

Alternative - Equivalent Performance: SMLJ60CA (Bourns Inc.) and TV30C600JB-G (Comchip Technology) deliver equivalent electrical specifications with 31A peak pulse current and 3000W power dissipation. Both are active products with RoHS3 compliance and suitable for direct substitution in applications where the original SMDJ60C was specified.

Extended Temperature Range Option: 5.0SMLJ60CA-TP (Micro Commercial Co) extends the operating temperature range to -55°C to 175°C and provides enhanced peak pulse current of 51.7A with 5000W power capability. This part is suitable for applications requiring higher transient energy absorption or operation in elevated temperature environments.

Reduced Performance Alternative: SMCJ60CA (Fairchild Semiconductor) and SMCJ60CAE3/TR13 (Microchip Technology) operate at 15.5A peak pulse current with 1500W power rating. These parts are appropriate only for applications where the original design margin permits reduced transient current handling.

Temperature-Optimized Option: SMCJ60CAE3/TR13 (Microchip Technology) maintains the original SMDJ60C operating temperature range of -65°C to 150°C while providing active product status and RoHS3 compliance, though with reduced current and power specifications.

Frequently Asked Questions (FAQ)

Q: Can SMCJ60CA replace SMDJ60C in all applications? A: SMCJ60CA is electrically compatible in terms of voltage parameters but operates at 15.5A peak pulse current versus the original 31A specification. Substitution is valid only if the application design margin accommodates the reduced transient current handling capacity and 1500W power dissipation limit.

Q: What is the difference between SMDJ60CA and SMLJ60CA? A: Both parts maintain identical electrical specifications: 60V reverse standoff, 96.8V clamping voltage, 31A peak pulse current, and 3000W power rating. The primary difference is manufacturer (Alpha & Omega Semiconductor Inc. versus Bourns Inc.). Both are active products suitable for direct substitution of the obsolete SMDJ60C.

Q: Is the 5.0SMLJ60CA-TP suitable for the original SMDJ60C application? A: Yes, 5.0SMLJ60CA-TP is mechanically and electrically compatible with enhanced performance characteristics. It provides 51.7A peak pulse current and 5000W power dissipation, exceeding the original 31A and 3000W specifications. The extended temperature range to 175°C makes it suitable for high-reliability applications. Verify that the application circuit can accommodate the enhanced transient energy absorption capability.

Q: Does package format differ between substitute parts? A: All substitute parts listed use the DO-214AB (SMC) surface-mount package, maintaining mechanical compatibility with the original SMDJ60C footprint and assembly process.

Q: Are all substitute parts RoHS3 compliant? A: All active substitute parts listed are RoHS3 compliant, meeting environmental and regulatory requirements equivalent to the original SMDJ60C specification.

Q: What is the significance of the clamping voltage difference between SMDJ60C (101.64V) and substitute parts (96.8V)? A: The clamping voltage represents the maximum voltage across the diode at peak pulse current. The 4.84V difference between the original and substitutes is within typical manufacturing tolerance for TVS diodes in this voltage class and does not affect functional compatibility for general-purpose overvoltage protection applications.

Q: Can SMLJ60CAE3/TR13 be used despite the 300W power rating discrepancy? A: SMLJ60CAE3/TR13 is listed with 300W peak pulse power, which represents a significant deviation from the original 3000W specification. This part should not be selected as a direct replacement unless the application circuit design has been re-evaluated for substantially reduced transient energy absorption capability.

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