SMP30-M3/84A Equivalent & Substitute Parts

Part Overview

The SMP30-M3/84A is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose transient protection applications. This component features a 30V reverse standoff voltage with a 53.5V maximum clamping voltage and 7.5A peak pulse current capability in a surface-mount DO-220AA package. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

SMP30-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 820SMP30-M3/84A Datasheet

Current PartRFQ

SMP30-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 675SMP30-M3/85A Datasheet

DirectRFQ

SMP30A-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 10380SMP30A-M3/84A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMP30-M3/84A is determined by the following critical parameters:

• Reverse Standoff Voltage (Typ): 30V — must remain constant
• Breakdown Voltage (Min): 33.3V — must remain constant
• Package / Case: DO-220AA (SMP) — mechanical and thermal compatibility requirement
• Mounting Type: Surface Mount — PCB assembly compatibility
• Unidirectional Channels: 1 — functional topology requirement
• Operating Temperature Range: -55°C to 150°C (TJ) — thermal operating envelope
• RoHS Status: ROHS3 Compliant — regulatory compliance requirement

Two active substitute parts meet these criteria:

1. SMP30-M3/85A — Identical standoff and breakdown voltages; differs only in clamping voltage specification (53.5V) and product status (Active vs. Obsolete)
2. SMP30A-M3/84A — Identical standoff and breakdown voltages; differs in clamping voltage (48.4V), peak pulse current (8.3A), and packaging format (Tape & Reel)

Parameter Comparison

Engineering Selection Recommendations

SMP30-M3/85A is the primary substitute for the obsolete SMP30-M3/84A. Both parts share identical electrical specifications for standoff voltage, breakdown voltage, clamping voltage, and peak pulse current. The SMP30-M3/85A maintains active product status with Vishay, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and carry MSL 1 rating, meeting identical regulatory and environmental requirements.

SMP30A-M3/84A serves as a secondary substitute option. This part maintains the same standoff and breakdown voltages but provides a lower clamping voltage (48.4V versus 53.5V) and higher peak pulse current capability (8.3A versus 7.5A). The SMP30A-M3/84A is supplied in Tape & Reel packaging format, which may be advantageous for high-volume automated assembly operations. This part is also active and ROHS3 compliant.

Selection between SMP30-M3/85A and SMP30A-M3/84A depends on application-specific clamping voltage requirements and packaging format preferences. Both maintain full regulatory compliance and thermal operating specifications equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can SMP30-M3/85A be used as a direct replacement for SMP30-M3/84A?

A: Yes. Both parts share identical reverse standoff voltage (30V), breakdown voltage (33.3V), clamping voltage (53.5V), peak pulse current (7.5A), package type (DO-220AA), and operating temperature range (-55°C to 150°C). The primary difference is product status: SMP30-M3/85A is active while SMP30-M3/84A is obsolete.

Q: What is the difference between SMP30-M3/84A and SMP30A-M3/84A?

A: Both parts maintain identical standoff and breakdown voltages. The SMP30A-M3/84A provides a lower maximum clamping voltage (48.4V versus 53.5V) and higher peak pulse current (8.3A versus 7.5A). Packaging differs: SMP30A-M3/84A is supplied in Tape & Reel format. Selection depends on whether the lower clamping voltage specification is acceptable for the application.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the DO-220AA surface-mount package and share identical pin configurations. PCB layout and footprint remain unchanged across all three part numbers.

Q: Do all substitute parts meet the same regulatory requirements?

A: Yes. SMP30-M3/85A and SMP30A-M3/84A are both ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMP30-M3/84A specifications.

Q: Which substitute should be selected for new designs?

A: SMP30-M3/85A is recommended for new designs as it provides exact electrical parameter matching with active product status and standard packaging. SMP30A-M3/84A is suitable when Tape & Reel packaging is required for automated assembly or when the lower clamping voltage specification is compatible with circuit requirements.