AS1PM-M3/85A Equivalent & Substitute Parts

Part Overview

The AS1PM-M3/85A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-220AA package. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A
Reverse Recovery Time (trr)	1.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	10.4 pF @ 4V, 1MHz
Package / Case	DO-220AA (SMP)
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Avalanche
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the AS1PM-M3/85A is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part AS1PM-M3/84A is classified as a parametric equivalent based on identical specifications in the following categories:

Electrical Parameters:

Reverse voltage rating: 1000 V
Average rectified current: 1.5 A
Forward voltage drop: 1.15 V @ 1.5 A
Reverse recovery time: 1.5 µs
Reverse leakage current: 5 µA @ 1000 V
Junction capacitance: 10.4 pF @ 4V, 1MHz

Mechanical Parameters:

Package type: DO-220AA (SMP)
Mounting configuration: Surface Mount
Temperature range: -55°C ~ 175°C

Compliance & Status:

Technology: Avalanche diode
Product status: Active
RoHS3 compliance: Yes
Moisture sensitivity level: 1 (Unlimited)

Parameter Comparison

Parameter	AS1PM-M3/85A	AS1PM-M3/84A	Match
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	Identical
Current - Average Rectified (Io)	1.5 A	1.5 A	Identical
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 1.5 A	Identical
Reverse Recovery Time (trr)	1.5 µs	1.5 µs	Identical
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	Identical
Capacitance @ Vr, F	10.4 pF @ 4V, 1MHz	10.4 pF @ 4V, 1MHz	Identical
Package / Case	DO-220AA (SMP)	DO-220AA (SMP)	Identical
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	Identical
Technology	Avalanche	Avalanche	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

Both AS1PM-M3/85A and AS1PM-M3/84A are active products manufactured by Vishay General Semiconductor - Diodes Division within the eSMP® series. Selection between these parts is based on availability and procurement requirements rather than technical differentiation.

AS1PM-M3/85A is suitable for applications where current inventory status of 800 pieces meets project lead times and volume requirements.

AS1PM-M3/84A is suitable for applications requiring higher inventory availability, with 4100 pieces in stock, supporting larger production volumes or extended supply chain buffers.

Both parts carry identical RoHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1), making them interchangeable from regulatory and environmental standpoints. The DO-220AA surface mount package ensures compatibility with existing PCB layouts and automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can AS1PM-M3/84A be used as a direct replacement for AS1PM-M3/85A?

A: Yes. AS1PM-M3/84A is a parametric equivalent with identical electrical specifications, package type, and operating temperature range. Direct substitution is supported without circuit modification.

Q: Are there differences in forward voltage drop between these parts?

A: No. Both parts specify 1.15 V maximum forward voltage at 1.5 A, ensuring identical voltage regulation performance in circuit applications.

Q: Do both parts support the same PCB assembly process?

A: Yes. Both parts use the DO-220AA surface mount package with identical mounting configuration, supporting standard SMT assembly equipment and processes.

Q: What is the significance of the reverse recovery time specification?

A: The reverse recovery time of 1.5 µs is identical for both parts, ensuring equivalent switching performance in high-frequency rectification and protection circuits.

Q: Are there compliance differences between AS1PM-M3/85A and AS1PM-M3/84A?

A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating.

Q: Which part should be selected based on availability?

A: AS1PM-M3/84A offers higher inventory availability at 4100 pieces compared to 800 pieces for AS1PM-M3/85A. Selection depends on project volume and lead time requirements.

Q: Is the reverse leakage current specification the same for both parts?

A: Yes. Both parts specify 5 µA maximum reverse leakage current at 1000 V, ensuring identical leakage performance across the rated voltage range.

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