SMBJ90A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ90A-M3/52 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 voltage class and provides transient protection for general-purpose applications. The part is actively produced and widely stocked, with 1029 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing preferences.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	90V
Voltage - Breakdown (Min)	100V
Voltage - Clamping (Max) @ Ipp	146V
Current - Peak Pulse (10/1000µs)	4.1A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
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 SMBJ90A-M3/52 are classified based on strict electrical and mechanical parameter matching:

Direct Electrical Equivalents (100% Parameter Match): Parts that maintain identical electrical specifications across all critical parameters: 90V reverse standoff voltage, 100V minimum breakdown voltage, 146V maximum clamping voltage, 4.1A peak pulse current, and 600W peak pulse power. These parts differ only in manufacturer, packaging format (Tape & Reel vs. Cut Tape), or internal device designation suffix.

Voltage Class Alternatives (Different Voltage Rating): Parts that operate in a different voltage class but maintain the same package, mounting type, and general-purpose application category. These are listed for reference but require circuit validation before substitution.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ)	VBR (Min)	VC (Max)	Ipp (A)	PPP (W)	Package	Temp Range	RoHS
SMBJ90A-M3/52	Vishay	90V	100V	146V	4.1A	600W	DO-214AA	-55°C ~ 150°C	ROHS3
SMBJ90A-E3/52	Vishay	90V	100V	146V	4.1A	600W	DO-214AA	-55°C ~ 150°C	ROHS3
SMBJ90A	MDD	90V	100V	146V	4.1A	600W	DO-214AA	-50°C ~ 150°C	ROHS3
SMBJ90A-13-F	Diodes Incorporated	90V	100V	146V	4.1A	600W	DO-214AA	-55°C ~ 150°C	ROHS3
SMBJ78A	MDD	78V	86.7V	126V	4.8A	600W	DO-214AA	-50°C ~ 150°C	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Performance):

SMBJ90A-E3/52 (Vishay) and SMBJ90A-13-F (Diodes Incorporated) are direct functional equivalents with identical voltage ratings, clamping characteristics, and peak pulse specifications. Both maintain ROHS3 compliance and MSL 1 rating. Selection between these and the original part depends on packaging preference (Cut Tape vs. Tape & Reel) and supplier availability.

SMBJ90A (MDD) provides identical electrical performance with a slightly reduced operating temperature minimum (-50°C vs. -55°C). This part is suitable for applications where the lower temperature bound is not a design constraint.

Alternative Voltage Class (SMBJ78A):

SMBJ78A operates at 78V reverse standoff voltage with 126V maximum clamping voltage. This part is not electrically equivalent and requires circuit validation. It is listed as a manufacturer-recommended alternative only for applications where lower voltage protection is acceptable.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and surface mount DO-214AA packaging compatibility with the original SMBJ90A-M3/52.

Frequently Asked Questions (FAQ)

Q: Can SMBJ90A-E3/52 be used as a direct replacement for SMBJ90A-M3/52?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications: 90V reverse standoff, 100V breakdown, 146V clamping, and 4.1A peak pulse current. The difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Verify your assembly equipment compatibility with the packaging format before substitution.

Q: What is the difference between SMBJ90A from MDD and the Vishay SMBJ90A-M3/52?

A: Electrical specifications are identical. The MDD part has a minimum operating temperature of -50°C compared to -55°C for Vishay. If your application requires operation below -50°C, use the Vishay part. Otherwise, both are functionally equivalent.

Q: Is SMBJ90A-13-F from Diodes Incorporated compatible with SMBJ90A-M3/52?

A: Yes. This part maintains all critical electrical parameters: 90V standoff, 100V breakdown, 146V clamping, and 4.1A peak pulse. Operating temperature range matches the original (-55°C to 150°C). Both use DO-214AA packaging and are ROHS3 compliant.

Q: Can SMBJ78A replace SMBJ90A-M3/52?

A: No. SMBJ78A operates at a lower voltage class (78V standoff vs. 90V). Substitution requires circuit validation to confirm the lower voltage protection threshold is acceptable for your application. Use only if your design specifications permit operation at 78V standoff voltage.

Q: Are all substitute parts available in the same package?

A: Yes. All listed parts use DO-214AA (SMB) surface mount packaging. Packaging format variations (Tape & Reel vs. Cut Tape) exist but do not affect electrical compatibility or PCB assembly compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. ECCN classification is EAR99 for all parts.

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