SMP28A-M3/85A Equivalent & Substitute Parts

Part Overview

The SMP28A-M3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a Zener-type TVS device in the TransZorb® and eSMP® series, designed for general-purpose transient voltage suppression applications. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range.

Substiute Parts

SMP28A-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 10619SMP28A-M3/85A Datasheet

Current PartRFQ

SMP28A-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 10252SMP28A-M3/84A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMP28A-M3/85A are identified based on strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 28V
• Voltage - Breakdown (Min): 31.1V
• Voltage - Clamping (Max) @ Ipp: 45.4V
• Current - Peak Pulse (10/1000µs): 8.8A
• Power - Peak Pulse: 400W
• Package / Case: DO-220AA (SMP)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C to 150°C (TJ)

The SMP28A-M3/84A meets all specified electrical and mechanical parameters, maintaining identical performance characteristics within the defined operating envelope. Both parts share the same base product number (SMP28), series designation (TransZorb® and eSMP®), and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMP28A-M3/85A and SMP28A-M3/84A are active production components manufactured by Vishay General Semiconductor - Diodes Division. Selection between these parts is based on inventory availability and supply chain considerations, as all electrical performance, mechanical compatibility, and regulatory compliance parameters are identical.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements. The MSL 1 rating (unlimited moisture sensitivity) applies to both components, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Are SMP28A-M3/85A and SMP28A-M3/84A electrically interchangeable?

A: Yes. Both parts maintain identical voltage ratings (28V reverse standoff, 31.1V breakdown minimum, 45.4V clamping maximum), current specifications (8.8A peak pulse), and power dissipation (400W peak pulse). They are direct electrical equivalents.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both components use the DO-220AA (SMP) surface mount package with identical pinout and footprint requirements. No PCB layout modifications are necessary when substituting between these parts.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SMP28A-M3/85A and SMP28A-M3/84A are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating. Regulatory and environmental compliance is equivalent.

Q: What is the difference between these two part numbers?

A: The difference is limited to manufacturing lot or tape reel configuration (indicated by the suffix /85A versus /84A). All specified electrical, mechanical, and performance parameters are identical.

Q: Are there any temperature or operating condition differences?

A: No. Both parts operate across the identical temperature range of -55°C to 150°C (junction temperature) and are rated for the same general-purpose transient voltage suppression applications.