AS1PD-M3/85A Equivalent & Substitute Parts

Part Overview

The AS1PD-M3/85A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, classified within the Diodes, Rectifiers category. This surface mount component operates at 200 V DC reverse voltage with 1.5 A average rectified current in a DO-220AA package. The part is Active in product status and complies with RoHS3 and REACH regulations. Substitute parts are identified to address inventory availability, supply chain continuity, and equivalent functional performance in applications requiring 200 V / 1.5 A avalanche diode specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 1.5 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5 @ 200 V	µA
Capacitance @ Vr, F	10.4 @ 4V, 1MHz	pF
Package / Case	DO-220AA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Avalanche	—
Series	eSMP®	—

Substitute Part Grouping Explanation

Substitution of the AS1PD-M3/85A is determined by equivalence across the following critical parameters:

Voltage - DC Reverse (Vr) (Max): 200 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 @ 200 V
Capacitance @ Vr, F: 10.4 pF @ 4V, 1MHz
Package / Case: DO-220AA
Mounting Type: Surface Mount
Technology: Avalanche
Series: eSMP®

All substitute parts listed maintain identical electrical characteristics and mechanical compatibility with the main part number. Substitutes are grouped as parametric equivalents, meaning they satisfy the same functional requirements within the specified parameter tolerances.

Parameter Comparison

Parameter	AS1PD-M3/85A	AS1PD-M3/84A	AS1PDHM3/84A
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	1.15 V @ 1.5 A	1.15 V @ 1.5 A
Reverse Recovery Time (trr)	1.5 µs	1.5 µs	1.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V
Capacitance @ Vr, F	10.4 pF @ 4V, 1MHz	10.4 pF @ 4V, 1MHz	10.4 pF @ 4V, 1MHz
Package / Case	DO-220AA	DO-220AA	DO-220AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
Technology	Avalanche	Avalanche	Avalanche
Series	eSMP®	eSMP®	eSMP®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Grade	Standard	Standard	Automotive
Qualification	—	—	AEC-Q101

Engineering Selection Recommendations

All three part numbers—AS1PD-M3/85A, AS1PD-M3/84A, and AS1PDHM3/84A—are Active products manufactured by Vishay General Semiconductor - Diodes Division and comply with RoHS3 and REACH regulations. They are functionally equivalent across all electrical and mechanical parameters.

The AS1PDHM3/84A variant includes Automotive grade classification and AEC-Q101 qualification, designating it for automotive applications requiring enhanced reliability and traceability standards. Selection between the standard-grade parts (AS1PD-M3/85A and AS1PD-M3/84A) and the automotive-grade part (AS1PDHM3/84A) depends on application requirements and end-use environment specifications.

All parts are supplied in Tape & Reel (TR) packaging with Surface Mount configuration in the DO-220AA package, ensuring mechanical and thermal compatibility in PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can AS1PD-M3/84A be used as a direct replacement for AS1PD-M3/85A?

A: Yes. Both parts are parametric equivalents with identical electrical specifications across voltage, current, recovery time, leakage, and capacitance parameters. Both are packaged in DO-220AA and mounted as surface mount components. No circuit redesign is required.

Q: What is the difference between AS1PDHM3/84A and the other two part numbers?

A: AS1PDHM3/84A maintains identical electrical and mechanical specifications but includes Automotive grade classification and AEC-Q101 qualification. This designation indicates compliance with automotive reliability and qualification standards. Selection depends on whether the application requires automotive-grade components.

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

A: Yes. All three parts use the DO-220AA package with Surface Mount configuration. PCB footprints, thermal characteristics, and assembly processes are identical across all three part numbers.

Q: Do these parts have different temperature operating ranges?

A: No. All three parts operate across the same junction temperature range of -55°C to 175°C.

Q: Are there any compliance or regulatory differences between these parts?

A: All three parts are RoHS3 Compliant, REACH Unaffected, and carry Moisture Sensitivity Level 1 (Unlimited). The AS1PDHM3/84A additionally carries AEC-Q101 automotive qualification. Regulatory compliance is equivalent for non-automotive applications.

Q: What inventory status should I consider when selecting a substitute?

A: AS1PD-M3/85A has 864 Pcs in stock. AS1PD-M3/84A has 9100 Pcs in stock. AS1PDHM3/84A has 9400 Pcs in stock. Substitute parts offer significantly higher inventory availability.

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