SMBJ85D-M3/H Equivalent & Substitute Parts

Part Overview

The SMBJ85D-M3/H is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component operates in the 85V reverse standoff voltage class and is designed for general-purpose transient voltage suppression applications. The device is Active in product status and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter tolerances for this product category.

Substiute Parts

SMBJ85D-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1151SMBJ85D-M3/H Datasheet

Current PartRFQ

SMBJ85A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 45289SMBJ85A-E3/52 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ85D-M3/H is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Clamping (Max) @ Ipp: within acceptable tolerance range
• Current - Peak Pulse (10/1000µs): equivalent or greater capacity
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• Series Classification: TransZorb® unidirectional TVS diodes
• RoHS Compliance: ROHS3 Compliant

The SMBJ85A-E3/52 qualifies as a manufacturer-recommended substitute because it maintains the same reverse standoff voltage class (85V), operates within the same package footprint (DO-214AA, SMB), supports equivalent peak pulse current performance, and shares identical compliance certifications and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ85D-M3/H and SMBJ85A-E3/52 are Active product status components from Vishay General Semiconductor - Diodes Division. Both devices are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The SMBJ85A-E3/52 carries significantly higher inventory availability (45,200 pcs vs. 1,117 pcs), making it the preferred selection for production applications requiring extended lead time assurance. The electrical parameter variations between the two devices fall within acceptable engineering tolerances for general-purpose TVS applications in the 85V class.

Frequently Asked Questions (FAQ)

Q: Can SMBJ85A-E3/52 be used as a direct replacement for SMBJ85D-M3/H?

A: Yes. Both devices share identical reverse standoff voltage (85V), equivalent peak pulse current performance, matching DO-214AA package geometry, and identical thermal operating range (-55°C to 150°C). The clamping voltage difference (135V vs. 137V) and peak pulse current difference (4.46A vs. 4.4A) are within acceptable substitution tolerances for general-purpose transient suppression circuits.

Q: Are there package compatibility concerns?

A: No. Both parts use the DO-214AA (SMB) surface mount package. PCB footprints, solder pad layouts, and mounting procedures are identical.

Q: What is the inventory advantage of the substitute part?

A: The SMBJ85A-E3/52 has 45,200 units in stock compared to 1,117 units for the SMBJ85D-M3/H, providing significantly improved availability for production schedules.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both are RoHS3 compliant, REACH unaffected, and carry identical MSL rating (1 - Unlimited). Regulatory and environmental compliance is equivalent.

Q: What determines substitution eligibility for SMBJ85 series TVS diodes?

A: Substitution is valid when the reverse standoff voltage class (85V), package type (DO-214AA, SMB), mounting method (surface mount), and compliance certifications remain constant. Peak pulse current and clamping voltage must support the application's transient suppression requirements.