AS1PDHM3/85A Equivalent & Substitute Parts

Part Overview

The AS1PDHM3/85A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage and 1.5 A average rectified current. This surface mount component is packaged in DO-220AA (SMP) format and is qualified to AEC-Q101 automotive standards. The part is currently active in production with 980 pieces in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the same product category. Alternative part numbers within the AS1 base product family provide equivalent functionality for applications requiring component interchangeability or inventory optimization.

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	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Avalanche	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the AS1PDHM3/85A is determined by equivalence across the following critical parameters:

Voltage Rating: DC reverse voltage of 200 V
Current Rating: Average rectified current of 1.5 A
Forward Voltage: Maximum forward voltage of 1.15 V at 1.5 A
Recovery Characteristics: Reverse recovery time of 1.5 µs
Leakage Current: Reverse leakage of 5 µA at 200 V
Package Format: DO-220AA surface mount package
Temperature Range: Junction operating range of -55°C to 175°C
Technology: Avalanche diode classification

The substitute parts AS1PD-M3/84A and AS1PDHM3/84A maintain identical electrical specifications and mechanical compatibility with the main part number. Both alternatives are manufactured by Vishay General Semiconductor - Diodes Division within the eSMP® series and are packaged in tape and reel format for surface mount assembly.

Parameter Comparison

Parameter	AS1PDHM3/85A	AS1PD-M3/84A	AS1PDHM3/84A
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Series	eSMP®	eSMP®	eSMP®
Technology	Avalanche	Avalanche	Avalanche
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
Product Status	Active	Active	Active
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
Automotive Grade	Yes (AEC-Q101)	Not specified	Yes (AEC-Q101)

Engineering Selection Recommendations

All three part numbers—AS1PDHM3/85A, AS1PD-M3/84A, and AS1PDHM3/84A—are active products manufactured by Vishay General Semiconductor - Diodes Division and maintain full electrical and mechanical equivalence.

AS1PDHM3/85A is the primary reference part with automotive-grade qualification (AEC-Q101) and 980 pieces currently in stock.

AS1PDHM3/84A is a direct substitute with identical specifications, automotive-grade qualification (AEC-Q101), and higher inventory availability at 9,400 pieces.

AS1PD-M3/84A is a parametric equivalent with identical electrical specifications and 9,100 pieces in stock. This part does not carry explicit automotive-grade designation in the provided data.

For applications requiring automotive qualification, AS1PDHM3/84A provides equivalent performance with superior inventory availability. For general applications where automotive qualification is not mandated, AS1PD-M3/84A offers equivalent electrical performance.

All parts comply with ROHS3, maintain MSL 1 (unlimited moisture sensitivity), and are REACH unaffected. Selection between substitutes should be based on inventory requirements, automotive qualification necessity, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can AS1PD-M3/84A be used in place of AS1PDHM3/85A in automotive applications?

A: AS1PD-M3/84A maintains identical electrical specifications and mechanical compatibility. However, the provided data does not specify automotive-grade qualification for this part number. For applications requiring AEC-Q101 certification, AS1PDHM3/84A is the appropriate substitute.

Q: Are the electrical characteristics identical across all three part numbers?

A: Yes. All three part numbers share identical specifications for voltage rating (200 V), current rating (1.5 A), forward voltage (1.15 V @ 1.5 A), reverse recovery time (1.5 µs), reverse leakage current (5 µA @ 200 V), and capacitance (10.4 pF @ 4V, 1MHz).

Q: Is the DO-220AA package compatible across all substitutes?

A: Yes. All three part numbers use the DO-220AA (SMP) surface mount package format, ensuring mechanical and footprint compatibility on PCB assemblies.

Q: What is the difference between AS1PDHM3/85A and AS1PDHM3/84A?

A: Both parts are automotive-grade (AEC-Q101) with identical electrical specifications. The primary difference is inventory availability, with AS1PDHM3/84A offering 9,400 pieces compared to 980 pieces for AS1PDHM3/85A.

Q: Are all parts RoHS compliant?

A: Yes. All three part numbers are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level and REACH unaffected status.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that automotive qualification requirements are met. AS1PDHM3/85A and AS1PDHM3/84A are both AEC-Q101 qualified. AS1PD-M3/84A is electrically equivalent but lacks specified automotive qualification in the provided data.

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