AS3PJHM3/87A Equivalent & Substitute Parts

Part Overview

The AS3PJHM3/87A is an avalanche diode rated for 600 V DC reverse voltage with 2.1 A average rectified current, manufactured by Vishay General Semiconductor - Diodes Division. This component is packaged in a surface mount TO-277A (SMPC) configuration and qualifies for automotive applications under AEC-Q101 certification. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	2.1	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1.5 A	mV @ A
Reverse Recovery Time (trr)	1.2	µs
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Capacitance @ Vr, F	37	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 175	°C
Package / Case	TO-277, 3-PowerDFN
Mounting Type	Surface Mount
Technology	Avalanche
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the AS3PJHM3/87A is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 2.1 A
Reverse Recovery Time (trr): 1.2 µs
Current - Reverse Leakage @ Vr: 10 µA @ 600 V
Capacitance @ Vr, F: 37 pF @ 4V, 1MHz
Operating Temperature - Junction: -55°C to 175°C

Mechanical Parameters (Must Match):

Package / Case: TO-277, 3-PowerDFN
Mounting Type: Surface Mount
Supplier Device Package: TO-277A (SMPC)

Compliance Parameters (Must Match):

Technology: Avalanche
Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

The forward voltage specification (Vf) may vary within acceptable design margins. Parts are grouped as direct equivalents when all electrical, mechanical, and compliance parameters align with the main part specifications.

Parameter Comparison

Parameter	AS3PJHM3/87A (Main)	AS3PJHM3_A/I	AS3PJ-M3/86A	AS3PJ-M3/87A
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 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 @ 600 V	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V
Capacitance @ Vr, F	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz	37 pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
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
Technology	Avalanche	Avalanche	Avalanche	Avalanche
Grade	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	AEC-Q101
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

AS3PJHM3_A/I is a direct manufacturer equivalent with identical electrical specifications and automotive AEC-Q101 qualification. This part is currently active in production and available in Tape & Reel packaging. The forward voltage specification differs in test conditions (1.1 V @ 3 A versus 920 mV @ 1.5 A) but represents the same device technology and performance class. This part is the primary substitute for the discontinued AS3PJHM3/87A.

AS3PJ-M3/86A and AS3PJ-M3/87A are parametric equivalents with identical electrical performance, automotive qualification, and active product status. Both are supplied in Tape & Reel packaging. These parts maintain full compatibility with the original AS3PJHM3/87A across all critical electrical and mechanical parameters. The forward voltage specifications for AS3PJ-M3/86A and AS3PJ-M3/87A match the original part at 920 mV @ 1.5 A.

All substitute parts maintain ROHS3 compliance, AEC-Q101 automotive qualification, and identical thermal operating ranges. Selection among the three active substitutes depends on packaging requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can AS3PJHM3_A/I be used as a direct replacement for AS3PJHM3/87A?

A: Yes. AS3PJHM3_A/I is a direct manufacturer equivalent with identical voltage rating (600 V), current rating (2.1 A), reverse recovery time (1.2 µs), and package configuration (TO-277A SMPC). Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance. The difference in forward voltage test conditions does not affect functional equivalence.

Q: What is the difference between AS3PJ-M3/86A and AS3PJ-M3/87A?

A: Both parts are parametric equivalents with identical electrical specifications, including 600 V reverse voltage, 2.1 A current rating, 1.2 µs reverse recovery time, and TO-277A surface mount packaging. Both are active products with AEC-Q101 qualification. The part numbers reflect internal Vishay designations but do not indicate functional differences relevant to circuit substitution.

Q: Are the packaging differences between bulk and Tape & Reel significant for substitution?

A: Packaging format (bulk versus Tape & Reel) affects supply chain logistics and handling but does not impact electrical or mechanical compatibility. The AS3PJHM3/87A (bulk) and its Tape & Reel equivalents (AS3PJHM3_A/I, AS3PJ-M3/86A, AS3PJ-M3/87A) are electrically and mechanically identical. Selection depends on production volume and assembly process requirements.

Q: Do all substitute parts meet automotive qualification requirements?

A: Yes. All substitute parts listed carry AEC-Q101 automotive qualification and ROHS3 compliance, matching the original AS3PJHM3/87A. Operating temperature range is identical across all parts (-55°C to 175°C junction temperature).

Q: What forward voltage specification should be used for circuit design?

A: The original AS3PJHM3/87A specifies 920 mV @ 1.5 A. AS3PJHM3_A/I specifies 1.1 V @ 3 A under different test conditions. Both specifications represent the same device technology. Circuit design should accommodate the maximum forward voltage specification of 1.1 V to ensure worst-case performance across all equivalent parts.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All substitute parts use identical TO-277A (SMPC) surface mount packaging with the same pinout, footprint, and thermal characteristics. No PCB layout modifications are required for substitution.

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