SMCJ45A-M3/57T Equivalent & Substitute Parts Reference

Part Overview

The SMCJ45A-M3/57T is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AB (SMC) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the TVS diode category.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	72.7	V
Current - Peak Pulse (10/1000µs)	20.6	A
Power - Peak Pulse	1500	W
Type	Zener	-
Unidirectional Channels	1	-
Mounting Type	Surface Mount	-
Package / Case	DO-214AB, SMC	-
Operating Temperature Range	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMCJ45A-M3/57T are classified into two categories based on electrical and mechanical compatibility:

Category 1: Direct Electrical Equivalents (1500W Peak Pulse)

These parts maintain identical electrical specifications including 45V reverse standoff voltage, 50V minimum breakdown voltage, 72.7V maximum clamping voltage, and 1500W peak pulse power rating. Peak pulse current values remain at 20.6A. These substitutes differ only in packaging format (Tape & Reel variants) or manufacturer source while maintaining full functional equivalence.

Category 2: Higher Power Rated Alternatives (3000W - 5000W Peak Pulse)

These parts share the same voltage parameters (45V standoff, 50V breakdown, 72.7V clamping) and surface mount DO-214AB package but feature increased peak pulse current handling (41.2A to 68.8A) and higher power dissipation ratings (3000W to 5000W). These are suitable for applications requiring enhanced transient energy absorption while maintaining voltage regulation characteristics.

Key Parameters Determining Substitution:

Voltage - Reverse Standoff: 45V (required match)
Voltage - Breakdown (Min): 50V (required match)
Voltage - Clamping (Max) @ Ipp: 72.7V (required match)
Package / Case: DO-214AB, SMC (required match)
Unidirectional Channels: 1 (required match)
Type: Zener (required match)
RoHS Status: ROHS3 Compliant (required match)

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Temp Range (°C)	RoHS Status
SMCJ45A-M3/57T	Vishay	45	50	72.7	20.6	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ45A-E3/57T	Vishay	45	50	72.7	20.6	1500	DO-214AB (SMCJ)	-55 to 150	ROHS3
1SMC45A TR13 PBFREE	Central Semiconductor	45	50	72.7	20.6	1500	DO-214AB (SMC)	-65 to 150	ROHS3
SMCJ45A	Meritek	45	50	72.7	20.63	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ45A-13-F	Diodes Incorporated	45	50	72.7	20.6	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ45A-TP	Micro Commercial Co	45	50	72.7	20.6	1500	DO-214AB (SMC)	-55 to 175	ROHS3
5.0SMDJ45A	Taiwan Semiconductor	45	50	72.7	68.8	5000	DO-214AB (SMC)	-55 to 175	ROHS3
SMDJ45A	Alpha & Omega Semiconductor	45	50	72.7	41.3	3000	DO-214AB (SMC)	-55 to 150	ROHS3
SMLJ45A	Bourns Inc.	45	50	72.7	41.2	3000	DO-214AB (SMC)	-55 to 150	ROHS3

Engineering Selection Recommendations

Direct Replacement Selection (1500W Category)

Parts SMCJ45A-E3/57T, 1SMC45A TR13 PBFREE, SMCJ45A, SMCJ45A-13-F, and SMCJ45A-TP provide direct electrical equivalence to SMCJ45A-M3/57T. All maintain identical voltage specifications and 1500W power rating. Selection among these options depends on packaging format availability and supply chain requirements. SMCJ45A-TP offers extended operating temperature range to 175°C. 1SMC45A TR13 PBFREE extends lower temperature operation to -65°C. All listed direct equivalents carry ROHS3 compliance and MSL 1 rating.

Higher Power Rated Selection (3000W - 5000W Category)

SMDJ45A, SMLJ45A, and 5.0SMDJ45A are suitable for applications requiring increased transient energy absorption. These maintain identical voltage regulation characteristics while providing 3000W to 5000W peak pulse power ratings. SMDJ45A and SMLJ45A operate at 3000W with peak pulse currents of 41.3A and 41.2A respectively. 5.0SMDJ45A provides maximum energy handling at 5000W with 68.8A peak pulse current. All three options support extended temperature operation to 175°C and maintain ROHS3 compliance.

Compliance Verification

All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part specification. REACH status varies; SMLJ45A is REACH Affected while all other substitutes are REACH Unaffected. Component selection should account for supply chain compliance requirements specific to end-use application geography.

Frequently Asked Questions (FAQ)

Q: Can SMCJ45A-E3/57T replace SMCJ45A-M3/57T directly?

A: Yes. SMCJ45A-E3/57T is a direct electrical equivalent with identical voltage specifications (45V standoff, 50V breakdown, 72.7V clamp) and 1500W peak pulse power rating. The difference is packaging format: E3/57T uses Cut Tape & Digi-Reel format while M3/57T uses Tape & Reel format. Both are DO-214AB (SMC) package.

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

A: Peak pulse power rating indicates maximum transient energy the device can absorb. 1500W parts (SMCJ45A series) handle 20.6A peak pulse current. 3000W parts (SMDJ45A, SMLJ45A) handle 41.2-41.3A. 5000W parts (5.0SMDJ45A) handle 68.8A. All maintain identical voltage clamping characteristics. Higher power ratings accommodate larger transient events without exceeding voltage limits.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use DO-214AB (SMC) surface mount package. This ensures mechanical compatibility with existing PCB layouts and assembly processes. Supplier device package designations may vary (SMC, SMCJ, etc.) but all reference the same DO-214AB physical form factor.

Q: What is the temperature operating range difference?

A: Most parts operate -55°C to 150°C. SMCJ45A-TP, 5.0SMDJ45A, and SMLJ45A extend upper limit to 175°C. 1SMC45A TR13 PBFREE extends lower limit to -65°C. Selection depends on application thermal requirements. Standard -55°C to 150°C range covers most general-purpose applications.

Q: Do all parts have the same RoHS compliance status?

A: All listed substitutes are ROHS3 compliant. SMLJ45A is REACH Affected; all others are REACH Unaffected. Verify REACH compliance requirements for your specific application geography and end-use market before final selection.

Q: Can I use a higher power rated part as a drop-in replacement?

A: Yes. Higher power rated parts (SMDJ45A, SMLJ45A, 5.0SMDJ45A) maintain identical voltage specifications and DO-214AB package. They provide enhanced transient energy absorption capability without affecting voltage regulation performance. This is suitable for applications where increased protection margin is beneficial.

Q: What does MSL 1 (Unlimited) mean?

A: Moisture Sensitivity Level 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 rating, eliminating moisture-related reliability concerns.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message