SMCJ90A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ90A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 90V reverse standoff category and provides transient protection for general-purpose applications. The part is active and widely available, with 902 units in current inventory. Substitute parts are identified based on matching electrical characteristics and package compatibility to ensure functional equivalence in circuit protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	90	V
Voltage - Breakdown (Min)	100	V
Voltage - Clamping (Max) @ Ipp	146	V
Current - Peak Pulse (10/1000µs)	10.3	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ90A-M3/9AT are qualified based on the following critical parameters:

Voltage - Reverse Standoff (Typ): 90V
Voltage - Breakdown (Min): 100V
Voltage - Clamping (Max) @ Ipp: 146V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Unidirectional (1 channel)
Operating Temperature: -55°C minimum to 150°C minimum

All substitute parts listed maintain these core electrical specifications and package requirements. Parts are grouped into two categories: direct equivalents with identical peak pulse current ratings (10.3A at 1500W) and manufacturer-recommended alternatives with higher current handling capability (20.6A to 34.3A at 3000W to 5000W).

Parameter Comparison

Part Number	Manufacturer	VWM (V)	VBR (V)	VC (V)	Ipp (A)	Ppk (W)	Toper (°C)	Package	Inventory
SMCJ90A-M3/9AT	Vishay	90	100	146	10.3	1500	-55 to 150	DO-214AB (SMC)	902
SMCJ90A-E3/57T	Vishay	90	100	146	10.3	1500	-55 to 150	DO-214AB (SMCJ)	2932
SMCJ90A	Fairchild Semiconductor	90	100	146	10.3	1500	-55 to 150	DO-214AB (SMC)	30200
SMCJ90A-13-F	Diodes Incorporated	90	100	146	10.3	1500	-55 to 150	DO-214AB (SMC)	15400
5.0SMDJ90A	Taiwan Semiconductor Corporation	90	100	146	34.3	5000	-55 to 175	DO-214AB (SMC)	3445
SMDJ90A	Alpha & Omega Semiconductor Inc.	90	100	146	20.6	3000	-55 to 150	DO-214AB	15100
SMLJ90A	Bourns Inc.	90	100	146	20.6	3000	-55 to 150	DO-214AB (SMC)	15100

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance)

SMCJ90A-E3/57T (Vishay), SMCJ90A (Fairchild Semiconductor), and SMCJ90A-13-F (Diodes Incorporated) are direct functional equivalents with matching peak pulse current (10.3A) and power dissipation (1500W). All three maintain the same voltage specifications and operating temperature range. Selection among these parts depends on packaging preference (Tape & Reel vs. Bulk) and inventory availability. All are RoHS3 compliant with MSL 1 rating where specified.

Higher Current Capacity Alternatives (Manufacturer-Recommended)

The 5.0SMDJ90A (Taiwan Semiconductor Corporation), SMDJ90A (Alpha & Omega Semiconductor Inc.), and SMLJ90A (Bourns Inc.) provide enhanced transient protection with peak pulse currents of 34.3A, 20.6A, and 20.6A respectively. These parts maintain identical voltage clamping characteristics but offer 3000W to 5000W peak pulse power handling. The 5.0SMDJ90A extends the operating temperature range to 175°C. These alternatives are suitable for applications requiring higher transient energy absorption while maintaining the same voltage protection threshold.

Frequently Asked Questions (FAQ)

Q: Can SMCJ90A-E3/57T replace SMCJ90A-M3/9AT directly?

A: Yes. Both parts share identical electrical specifications: 90V reverse standoff, 100V breakdown minimum, 146V clamping voltage, and 10.3A peak pulse current. The difference is packaging format (Tape & Reel vs. Tape & Reel with different supplier designation). Verify your assembly equipment compatibility with the specific tape format.

Q: What is the difference between the direct equivalents and manufacturer-recommended alternatives?

A: Direct equivalents (SMCJ90A variants from Vishay, Fairchild, and Diodes) provide identical 1500W peak pulse power. Manufacturer-recommended alternatives (5.0SMDJ90A, SMDJ90A, SMLJ90A) offer 3000W to 5000W peak pulse power with higher peak pulse currents (20.6A to 34.3A). Voltage protection characteristics remain identical. Use higher-power alternatives only if your application requires greater transient energy absorption.

Q: Are all substitute parts in the same package?

A: All substitute parts use DO-214AB (SMC) surface mount package. Minor supplier designation variations exist (SMCJ vs. SMC vs. generic DO-214AB), but these refer to the same physical package. Verify PCB footprint compatibility before substitution.

Q: What compliance certifications apply to these parts?

A: All listed parts are RoHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) where specified. REACH status varies: most parts are REACH Unaffected; SMLJ90A is REACH Affected. Verify REACH compliance requirements for your specific application and region.

Q: Can I use the higher-power alternatives (5.0SMDJ90A, SMDJ90A, SMLJ90A) as drop-in replacements?

A: Yes, from an electrical protection standpoint. These parts maintain identical voltage clamping and breakdown characteristics. The higher peak pulse current and power ratings provide enhanced protection margin. Verify that your circuit design does not depend on the specific current-limiting characteristics of the original 10.3A part before substitution.

Q: What is the operating temperature difference between parts?

A: Most parts operate from -55°C to 150°C. The 5.0SMDJ90A extends the upper limit to 175°C. Select the extended-temperature part only if your application requires operation above 150°C.

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