SMCJ48A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ48A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 48V reverse standoff category and is designed for general-purpose transient protection applications. The part is Active status and widely stocked, with 943 units available in inventory. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications to support component sourcing flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V
Current - Peak Pulse (10/1000µs)	19.4A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMCJ48A-M3/9AT are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Direct Electrical Equivalents (1500W Peak Pulse) These parts maintain identical electrical specifications: 48V reverse standoff, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, and 19.4A peak pulse current. All operate at 1500W peak pulse power and use the DO-214AB (SMC) surface mount package. Substitution within this category is based on matching these core parameters and compliance certifications.

Category 2: Higher Power Alternatives (3000W and 5000W Peak Pulse) These parts share the same voltage ratings and package but provide increased peak pulse current and power dissipation capability. Selection depends on application requirements for transient energy absorption.

Key parameters determining substitution eligibility:

Voltage - Reverse Standoff: 48V
Voltage - Clamping (Max) @ Ipp: 77.4V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temp Range	Inventory
SMCJ48A-M3/9AT	Vishay General Semiconductor	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	943 Pcs
SMCJ48A-E3/57T	Vishay General Semiconductor	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	19151 Pcs
SMCJ48A-E3/9AT	Vishay General Semiconductor	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	4102 Pcs
SMCJ48A	MDD	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-50°C ~ 150°C	16125 Pcs
SMCJ48A-13-F	Diodes Incorporated	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	2081 Pcs
SMCJ48A-TP	Micro Commercial Co	48V	77.4V	19.4A	1500W	DO-214AB, SMC	-55°C ~ 175°C	3509 Pcs
5.0SMDJ48A	Taiwan Semiconductor Corporation	48V	77.4V	64.7A	5000W	DO-214AB, SMC	-55°C ~ 175°C	3052 Pcs
SMLJ48A-TP	Micro Commercial Co	48V	77.4V	38.8A	3000W	DO-214AB, SMC	-55°C ~ 175°C	3675 Pcs

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance) SMCJ48A-E3/57T, SMCJ48A-E3/9AT, SMCJ48A (MDD), SMCJ48A-13-F, and SMCJ48A-TP are direct substitutes with matching 48V standoff voltage, 77.4V clamping voltage, and 19.4A peak pulse current. All are ROHS3 compliant and maintain MSL 1 rating. Selection among these parts is based on availability, packaging format (tape & reel specifications), and operating temperature requirements. SMCJ48A-E3/57T offers the highest inventory level (19151 units). SMCJ48A-TP and SMCJ48A-13-F support extended operating temperature to 175°C.

Higher Power Alternatives 5.0SMDJ48A and SMLJ48A-TP maintain voltage compatibility but provide increased transient energy absorption. 5.0SMDJ48A delivers 5000W peak pulse power with 64.7A peak current. SMLJ48A-TP provides 3000W peak pulse power with 38.8A peak current. Both support -55°C to 175°C operating range. These alternatives are suitable for applications requiring enhanced transient suppression capability within the same voltage class.

All substitute parts maintain ROHS3 compliance and DO-214AB (SMC) surface mount packaging, ensuring mechanical and environmental compatibility with the original SMCJ48A-M3/9AT specification.

Frequently Asked Questions (FAQ)

Q: Can SMCJ48A-E3/57T replace SMCJ48A-M3/9AT directly? A: Yes. Both parts share identical electrical specifications: 48V reverse standoff, 77.4V clamping voltage, 19.4A peak pulse current, and 1500W peak pulse power. The difference is packaging format (tape & reel specification). Both use DO-214AB (SMC) surface mount package and are ROHS3 compliant.

Q: What is the difference between SMCJ48A variants from different manufacturers? A: Vishay, MDD, Diodes Incorporated, and Micro Commercial Co versions maintain the same electrical performance and package. Differences include operating temperature range (MDD variant: -50°C to 150°C; others: -55°C to 150°C or -55°C to 175°C) and tape & reel specifications. Selection depends on temperature requirements and supply availability.

Q: When should I use 5.0SMDJ48A instead of SMCJ48A-M3/9AT? A: Use 5.0SMDJ48A when the application requires higher transient energy absorption. It maintains the same 48V voltage rating and 77.4V clamping voltage but provides 64.7A peak pulse current and 5000W peak pulse power compared to 19.4A and 1500W. Both use DO-214AB (SMC) package.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring environmental and regulatory compatibility.

Q: Does operating temperature range affect substitution? A: Operating temperature range should match application requirements. SMCJ48A-M3/9AT operates -55°C to 150°C. SMCJ48A-TP and 5.0SMDJ48A extend to 175°C. MDD SMCJ48A operates -50°C to 150°C. Select based on thermal environment specifications.

Q: Can I use SMLJ48A-TP as a direct replacement? A: SMLJ48A-TP is compatible for voltage and package but provides 3000W peak pulse power and 38.8A peak current versus 1500W and 19.4A. Use when higher transient suppression is required. All electrical voltage parameters remain identical.

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