SMCJ48A-13 Transient Voltage Suppressor (TVS) Diode Equivalent & Substitute Parts

Part Overview

The SMCJ48A-13 is a unidirectional Zener TVS diode manufactured by Diodes Incorporated, designed for transient voltage suppression in general-purpose applications. This part operates with a 48V reverse standoff voltage and provides 77.4V maximum clamping voltage at 19.4A peak pulse current, with 1500W peak pulse power handling capability in a surface-mount SMC (DO-214AB) package.

The SMCJ48A-13 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or enhanced electrical specifications, offering continued design support and component availability.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	48	V
Voltage - Breakdown (Min)	53.3	V
Voltage - Clamping (Max) @ Ipp	77.4	V
Current - Peak Pulse (10/1000µs)	19.4	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ48A-13 are classified into two categories based on electrical performance:

Category 1: Direct Electrical Equivalents (1500W Power Rating) These parts maintain identical voltage specifications (48V standoff, 53.3V breakdown minimum, 77.4V clamping maximum) and peak pulse current (19.4A) with 1500W peak pulse power handling. All parts in this category are housed in the DO-214AB (SMC) surface-mount package and are suitable for direct replacement without circuit redesign.

Category 2: Enhanced Performance Substitutes (3000W–5000W Power Rating) These parts maintain identical voltage specifications but provide higher peak pulse current ratings (38.8A to 64.7A) and increased power dissipation capability (3000W to 5000W). These parts are suitable for applications requiring greater transient energy absorption while maintaining the same voltage protection threshold. All parts in this category use the DO-214AB (SMC) surface-mount package.

Key Parameters Determining Substitution:

Voltage - Reverse Standoff: 48V (fixed)
Voltage - Breakdown (Min): 53.3V (fixed)
Voltage - Clamping (Max) @ Ipp: 77.4V (fixed)
Package / Case: DO-214AB, SMC (fixed)
Mounting Type: Surface Mount (fixed)
Unidirectional Channels: 1 (fixed)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Product Status	RoHS Status
SMCJ48A-13	Diodes Incorporated	48	53.3	77.4	19.4	1500	-55 to 150	DO-214AB, SMC	Discontinued	RoHS Non-Compliant
SMCJ48A-13-F	Diodes Incorporated	48	53.3	77.4	19.4	1500	-55 to 150	DO-214AB, SMC	Active	ROHS3 Compliant
SMCJ48A	MDD	48	53.3	77.4	19.4	1500	-50 to 150	DO-214AB, SMC	Active	ROHS3 Compliant
SMCJ48A-TP	Micro Commercial Co	48	53.3	77.4	19.4	1500	-55 to 175	DO-214AB, SMC	Active	ROHS3 Compliant
SMLJ48A	Bourns Inc.	48	53.3	77.4	38.8	3000	-55 to 150	DO-214AB, SMC	Active	ROHS3 Compliant
SMLJ48A-TP	Micro Commercial Co	48	53.3	77.4	38.8	3000	-55 to 175	DO-214AB, SMC	Active	ROHS3 Compliant
SMDJ48A	Alpha & Omega Semiconductor Inc.	48	53.3	77.4	38.8	3000	-55 to 150	DO-214AB, SMC	Active	ROHS3 Compliant
5.0SMDJ48A	Taiwan Semiconductor Corporation	48	53.3	77.4	64.7	5000	-55 to 175	DO-214AB, SMC	Active	ROHS3 Compliant
5.0SMDJ48A-T7	Littelfuse	48	53.3	77.4	64.7	5000	-65 to 150	DO-214AB, SMC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical 1500W Specification): SMCJ48A-13-F (Diodes Incorporated) is the primary direct equivalent, offering identical electrical performance with active product status and ROHS3 compliance. SMCJ48A (MDD) and SMCJ48A-TP (Micro Commercial Co) provide equivalent performance with extended temperature ranges (-50°C to 150°C and -55°C to 175°C respectively) and active availability.

For Enhanced Transient Protection (3000W Specification): SMLJ48A (Bourns Inc.), SMLJ48A-TP (Micro Commercial Co), and SMDJ48A (Alpha & Omega Semiconductor Inc.) provide doubled peak pulse current (38.8A) and power dissipation (3000W) while maintaining identical voltage protection thresholds. These parts are suitable for applications requiring greater transient energy absorption.

For Maximum Transient Protection (5000W Specification): 5.0SMDJ48A (Taiwan Semiconductor Corporation) and 5.0SMDJ48A-T7 (Littelfuse) provide the highest peak pulse current (64.7A) and power dissipation (5000W) capability. These parts are suitable for high-energy transient environments while maintaining identical voltage specifications.

Compliance Considerations: All active substitute parts are ROHS3 compliant. The original SMCJ48A-13 is RoHS non-compliant; migration to any active substitute part improves regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SMCJ48A-13-F be used as a direct replacement for SMCJ48A-13? A: Yes. SMCJ48A-13-F is electrically identical with 48V standoff voltage, 77.4V clamping voltage, 19.4A peak pulse current, and 1500W power rating. The primary difference is packaging format (Tape & Reel) and active product status with ROHS3 compliance.

Q: What is the difference between 1500W, 3000W, and 5000W rated parts? A: These ratings indicate peak pulse power dissipation capability. The 1500W parts (SMCJ48A series) handle 19.4A peak pulse current. The 3000W parts (SMLJ48A and SMDJ48A series) handle 38.8A. The 5000W parts (5.0SMDJ48A series) handle 64.7A. All maintain identical voltage protection thresholds (48V standoff, 77.4V clamping). Higher-rated parts are suitable for applications with greater transient energy.

Q: Are all substitute parts in the DO-214AB (SMC) package? A: Yes. All listed substitute parts use the DO-214AB (SMC) surface-mount package, ensuring mechanical and electrical compatibility with the original SMCJ48A-13 footprint.

Q: What is the operating temperature range difference between substitutes? A: The original SMCJ48A-13 operates from -55°C to 150°C. MDD's SMCJ48A operates from -50°C to 150°C. Micro Commercial Co parts (SMCJ48A-TP and SMLJ48A-TP) and Taiwan Semiconductor Corporation's 5.0SMDJ48A extend to -55°C to 175°C. Littelfuse's 5.0SMDJ48A-T7 operates from -65°C to 150°C. Select based on application temperature requirements.

Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed are ROHS3 compliant. The original SMCJ48A-13 is RoHS non-compliant. Substitution improves regulatory compliance for new designs.

Q: Can I use a higher-power-rated part (3000W or 5000W) in place of the 1500W original? A: Yes. Higher-power-rated parts maintain identical voltage specifications and are suitable for direct substitution. They provide enhanced transient protection capability without affecting circuit operation. This is a conservative design choice for applications subject to high-energy transients.

Q: What is the difference between SMCJ48A and SMCJ48A-13? A: Both parts share identical electrical specifications. The "-13" suffix on SMCJ48A-13 indicates a specific packaging or date code variant from Diodes Incorporated. The base part number SMCJ48A from MDD provides equivalent performance.

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