SMP20A-M3/85A Equivalent & Substitute Parts

Part Overview

The SMP20A-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 12,100 pieces available in new original inventory. Alternative part numbers may be required due to supply chain availability, inventory allocation, or specific procurement requirements from authorized distributors.

Substiute Parts

SMP20A-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 12199SMP20A-M3/85A Datasheet

Current PartRFQ

SMP20A-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 10246SMP20A-M3/84A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMP20A-M3/85A is based on strict equivalence of the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 12.3A
• Power - Peak Pulse: 400W
• Package / Case: DO-220AA (SMP)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener
• Series: TransZorb®, eSMP®

The substitute part SMP20A-M3/84A meets all these criteria and is therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Engineering Selection Recommendations

Both the SMP20A-M3/85A and SMP20A-M3/84A are active production components from Vishay General Semiconductor - Diodes Division. Both parts carry ROHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited), indicating equivalent regulatory and environmental qualification. Selection between these part numbers may be determined by distributor availability, procurement lead times, or inventory allocation policies. No technical differentiation exists between these components based on provided specifications.

Frequently Asked Questions (FAQ)

Q: Are SMP20A-M3/85A and SMP20A-M3/84A electrically identical?

A: Yes. Both parts share identical electrical specifications including reverse standoff voltage (20V), breakdown voltage (22.2V minimum), clamping voltage (32.4V maximum), peak pulse current (12.3A), and peak pulse power (400W).

Q: Can SMP20A-M3/84A be used as a direct replacement for SMP20A-M3/85A in PCB assembly?

A: Yes. Both components use the same DO-220AA (SMP) surface-mount package and are mechanically interchangeable. No PCB layout modifications are required.

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

A: The part numbers differ only in their suffix designations (85A versus 84A). All electrical, mechanical, and compliance specifications are identical. The suffix variation reflects internal Vishay manufacturing or distribution tracking and does not indicate functional differences.

Q: Are both parts suitable for the same temperature range applications?

A: Yes. Both components operate across the identical temperature range of -55°C to 150°C (junction temperature), making them suitable for equivalent thermal environments.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant, REACH Unaffected, and carry identical Moisture Sensitivity Level 1 (Unlimited) ratings.