SMDJ13 Equivalent & Substitute Parts

Part Overview

The SMDJ13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 13V reverse standoff voltage, 22.58V maximum clamping voltage, and 3000W peak pulse power rating in a DO-214AB (SMC) package. The SMDJ13 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	13	V
Voltage - Breakdown (Min)	13.64	V
Voltage - Clamping (Max) @ Ipp	22.58	V
Current - Peak Pulse (10/1000µs)	139.5	A
Power - Peak Pulse	3000	W
Operating Temperature Range	-65 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SMDJ13 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - Reverse Standoff (Typ): 13V
Voltage - Clamping (Max) @ Ipp: 21.5V to 22.58V range
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Unidirectional (1 channel)
RoHS Status: ROHS3 Compliant

Substitution Categories:

Category A - Full Electrical Equivalents (3000W Power Rating): Parts with 139.4A to 139.6A peak pulse current and 3000W power dissipation. These provide direct functional replacement with identical thermal and current handling characteristics.

Category B - Reduced Power Rating Equivalents (1500W Power Rating): Parts with 69.7A to 69.8A peak pulse current and 1500W power dissipation. These maintain voltage specifications and package compatibility but with reduced peak pulse current and power handling. Suitable for applications with lower transient energy requirements.

All substitute parts maintain the 13V reverse standoff voltage, 21.5V clamping voltage, DO-214AB package, surface-mount configuration, and ROHS3 compliance required for functional substitution.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Product Status	Package
SMDJ13	Littelfuse Inc.	13	22.58	139.5	3000	-65 to 150	Obsolete	DO-214AB, SMC
SMDJ13A	Alpha & Omega Semiconductor Inc.	13	21.5	139.6	3000	-55 to 150	Active	DO-214AB, SMC
SMCJ13A	ANBON SEMICONDUCTOR (INT'L) LIMITED	13	21.5	69.7	1500	-55 to 150	Active	DO-214AB, SMC
SMCJ13A-TP	Micro Commercial Co	13	21.5	69.8	1500	-55 to 175	Active	DO-214AB, SMC
SMCJ13AE3/TR13	Microchip Technology	13	21.5	69.7	1500	-65 to 150	Active	DO-214AB, SMC
SMLJ13A	Bourns Inc.	13	21.5	139.4	3000	-55 to 150	Active	DO-214AB, SMC
TV15C130J-G	Comchip Technology	13	21.5	69.77	1500	-55 to 150	Active	DO-214AB, SMC
TV30C130J-G	Comchip Technology	13	21.5	139.53	3000	-55 to 150	Active	DO-214AB, SMC

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SMDJ13A (Alpha & Omega Semiconductor Inc.) and SMLJ13A (Bourns Inc.) are the primary active equivalents, both rated at 3000W with 139.4A to 139.6A peak pulse current. Both are ROHS3 compliant and active products. SMDJ13A maintains the original -65°C lower operating temperature limit, while SMLJ13A operates from -55°C. Selection between these depends on supply chain availability and temperature range requirements.

TV30C130J-G (Comchip Technology) provides an alternative 3000W equivalent with 139.53A peak pulse current and ROHS3 compliance, suitable where Comchip sourcing is preferred.

For Reduced Power Applications:

SMCJ13A (ANBON SEMICONDUCTOR), SMCJ13A-TP (Micro Commercial Co), TV15C130J-G (Comchip Technology), and SMCJ13AE3/TR13 (Microchip Technology) are 1500W alternatives with 69.7A to 69.8A peak pulse current. These maintain voltage specifications and package compatibility but are suitable only for applications where peak transient energy does not exceed 1500W. SMCJ13A-TP offers the highest operating temperature range (-55°C to 175°C). SMCJ13AE3/TR13 maintains the original -65°C lower limit.

All substitute parts are ROHS3 compliant and active products, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SMDJ13A directly replace SMDJ13 in all applications?

A: SMDJ13A is electrically equivalent with matching 13V reverse standoff voltage, 21.5V clamping voltage, 3000W power rating, and DO-214AB package. The primary difference is the lower operating temperature limit of -55°C versus the original -65°C. Verify application temperature requirements before substitution.

Q: What is the difference between 3000W and 1500W rated parts?

A: The 3000W parts (SMDJ13A, SMLJ13A, TV30C130J-G) handle peak pulse currents of 139.4A to 139.6A, while 1500W parts (SMCJ13A, SMCJ13A-TP, TV15C130J-G, SMCJ13AE3/TR13) handle 69.7A to 69.8A. Selection depends on the transient energy level in the application. Use 1500W parts only where peak pulse current and energy requirements are confirmed below these thresholds.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the DO-214AB (SMC) surface-mount package, maintaining identical PCB footprint and assembly compatibility with the original SMDJ13.

Q: Which substitute offers the widest operating temperature range?

A: SMCJ13A-TP (Micro Commercial Co) operates from -55°C to 175°C. For applications requiring the original -65°C lower limit, SMDJ13A and SMCJ13AE3/TR13 maintain this specification.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting regulatory requirements for restricted substances in electrical and electronic equipment.

Q: What packaging options are available for these substitutes?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) configurations. Verify packaging requirements with your supplier, as availability varies by manufacturer and distributor.

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