AS3PMHM3/86A Equivalent & Substitute Parts

Part Overview

The AS3PMHM3/86A is a 1000 V avalanche diode rated for 2.1 A average rectified current in a surface mount TO-277A (SMPC) package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is part of the eSMP® series and meets AEC-Q101 automotive qualification standards. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	2.1 A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1.5 A
Reverse Recovery Time (trr)	1.2 µs
Current - Reverse Leakage @ Vr	10 µA @ 1000 V
Capacitance @ Vr, F	37 pF @ 4V, 1MHz
Package / Case	TO-277, 3-PowerDFN
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Avalanche
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AS3PMHM3/86A is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Reverse voltage rating: 1000 V (Vr Max)
Average rectified current: 2.1 A (Io)
Reverse recovery time: 1.2 µs (trr)
Reverse leakage current: 10 µA @ 1000 V
Junction capacitance: 37 pF @ 4V, 1MHz
Technology classification: Avalanche diode

Mechanical & Environmental Specifications:

Package type: TO-277, 3-PowerDFN (surface mount)
Mounting configuration: Surface Mount
Operating temperature range: -55°C ~ 175°C
Automotive grade qualification: AEC-Q101
Compliance: ROHS3 Compliant

Substitute parts must match all electrical parameters and maintain identical package geometry and mounting characteristics. Forward voltage specifications may vary within acceptable design margins when the core electrical performance remains equivalent.

Parameter Comparison

Parameter	AS3PMHM3/86A (Main)	AS3PMHM3_A/H	AS3PM-M3/86A	AS3PM-M3/87A
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	2.1 A	2.1 A	2.1 A	2.1 A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1.5 A	1.1 V @ 3 A	920 mV @ 1.5 A	920 mV @ 1.5 A
Reverse Recovery Time (trr)	1.2 µs	1.2 µs	1.2 µs	1.2 µs
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V
Capacitance @ Vr, F	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Technology	Avalanche	Avalanche	Avalanche	Avalanche
Grade	Automotive	Automotive	Not specified	Not specified
Qualification	AEC-Q101	AEC-Q101	Not specified	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Inventory Availability	808 Pcs	1074 Pcs	682 Pcs	766 Pcs

Engineering Selection Recommendations

AS3PMHM3_A/H is the primary direct substitute for AS3PMHM3/86A. Both parts maintain identical electrical specifications, package geometry, and automotive qualification status. AS3PMHM3_A/H carries active product status with higher inventory availability (1074 Pcs) and is supplied in Tape & Reel packaging. The forward voltage specification differs (1.1 V @ 3 A versus 920 mV @ 1.5 A), but this represents a measurement at different operating conditions and does not affect functional equivalence. Both parts are ROHS3 compliant and AEC-Q101 qualified.

AS3PM-M3/86A and AS3PM-M3/87A are parametric equivalents that maintain all critical electrical specifications including reverse voltage, current rating, recovery time, leakage current, and capacitance. Both parts are active products with adequate inventory. These alternatives are supplied in Tape & Reel packaging and are ROHS3 compliant. Automotive grade and AEC-Q101 qualification status are not specified for these variants, which may be a consideration for applications requiring explicit automotive certification documentation.

For applications requiring documented automotive qualification, AS3PMHM3_A/H is the recommended substitute. For applications where automotive certification is not a requirement, AS3PM-M3/86A and AS3PM-M3/87A provide equivalent electrical performance with active availability.

Frequently Asked Questions (FAQ)

Q: Can AS3PMHM3_A/H be used as a direct replacement for AS3PMHM3/86A?

A: Yes. AS3PMHM3_A/H is a direct substitute. Both parts share identical reverse voltage (1000 V), current rating (2.1 A), reverse recovery time (1.2 µs), leakage current (10 µA @ 1000 V), capacitance (37 pF @ 4V, 1MHz), package type (TO-277, 3-PowerDFN), and operating temperature range (-55°C ~ 175°C). Both are AEC-Q101 qualified and ROHS3 compliant. The forward voltage specification differs due to measurement at different operating points, but this does not affect functional equivalence.

Q: What is the difference between AS3PMHM3_A/H and AS3PM-M3/86A?

A: Both parts are electrically equivalent with identical reverse voltage, current rating, recovery time, leakage current, and capacitance specifications. The primary difference is that AS3PMHM3_A/H explicitly specifies automotive grade and AEC-Q101 qualification, while AS3PM-M3/86A does not include these certifications in the provided specifications. Both are surface mount TO-277 packages and ROHS3 compliant.

Q: Are AS3PM-M3/86A and AS3PM-M3/87A interchangeable?

A: Yes. Both parts are electrically identical across all specified parameters: 1000 V reverse voltage, 2.1 A current rating, 1.2 µs recovery time, 10 µA leakage current, and 37 pF capacitance. Both use the same TO-277, 3-PowerDFN surface mount package and operate across -55°C ~ 175°C. Both are ROHS3 compliant and active products.

Q: Does packaging format affect substitution?

A: The AS3PMHM3/86A main part does not specify packaging format. All substitute parts (AS3PMHM3_A/H, AS3PM-M3/86A, AS3PM-M3/87A) are supplied in Tape & Reel (TR) format. The component package type (TO-277, 3-PowerDFN) and mounting method (surface mount) remain identical across all parts, ensuring mechanical and electrical compatibility on the PCB.

Q: What are the critical parameters for substitution?

A: Substitution is determined by equivalence in reverse voltage (1000 V), average rectified current (2.1 A), reverse recovery time (1.2 µs), reverse leakage current (10 µA @ 1000 V), junction capacitance (37 pF @ 4V, 1MHz), package type (TO-277, 3-PowerDFN), mounting method (surface mount), and operating temperature range (-55°C ~ 175°C). All substitute parts meet these criteria.

Q: Is automotive qualification required for all applications?

A: Automotive qualification (AEC-Q101) is specified for the main part AS3PMHM3/86A and substitute AS3PMHM3_A/H. Applications requiring documented automotive certification should use AS3PMHM3_A/H. For non-automotive applications, AS3PM-M3/86A and AS3PM-M3/87A provide equivalent electrical performance without explicit automotive certification documentation.

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