AS4PMHM3/86A Equivalent & Substitute Parts

Part Overview

The AS4PMHM3/86A is an avalanche diode rated for 1000 V DC reverse voltage with 2.4 A average rectified current, packaged in a surface mount TO-277A (SMPC) configuration. This component is manufactured by Vishay General Semiconductor - Diodes Division as part of the eSMP® series and is classified as a standard recovery rectifier diode with a reverse recovery time of 1.8 µs.

The AS4PMHM3/86A has been discontinued at DiGi Electronics. Equivalent and substitute parts are available from the same manufacturer with active product status, offering direct functional replacement while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	2.4 A
Voltage - Forward (Vf) (Max) @ If	962 mV @ 2 A
Reverse Recovery Time (trr)	1.8 µs
Current - Reverse Leakage @ Vr	10 µA @ 1000 V
Capacitance @ Vr, F	60 pF @ 4 V, 1 MHz
Operating Temperature - Junction	-55°C ~ 175°C
Package / Case	TO-277, 3-PowerDFN
Mounting Type	Surface Mount
Technology	Avalanche
Speed	Standard Recovery >500 ns, > 200 mA (Io)

Substitute Part Grouping Explanation

Substitution of the AS4PMHM3/86A is determined by equivalence in the following critical parameters:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 2.4 A
Package / Case: TO-277, 3-PowerDFN
Mounting Type: Surface Mount
Technology: Avalanche
Reverse Recovery Time (trr): 1.8 µs
Operating Temperature Range: -55°C ~ 175°C

Substitute parts must maintain identical reverse voltage rating, average rectified current capacity, and physical package dimensions to ensure direct functional replacement in existing circuit designs. All substitute parts listed are manufactured by Vishay General Semiconductor - Diodes Division within the eSMP® series.

Parameter Comparison

Parameter	AS4PMHM3/86A	AS4PMHM3_A/H	AS4PM-M3/86A	AS4PM-M3/87A
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	2.4 A	2.4 A	2.4 A	2.4 A
Voltage - Forward (Vf) (Max) @ If	962 mV @ 2 A	1.1 V @ 4 A	962 mV @ 2 A	962 mV @ 2 A
Reverse Recovery Time (trr)	1.8 µs	1.8 µs	1.8 µs	1.8 µs
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V
Capacitance @ Vr, F	60 pF @ 4 V, 1 MHz	60 pF @ 4 V, 1 MHz	60 pF @ 4 V, 1 MHz	60 pF @ 4 V, 1 MHz
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 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
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

AS4PMHM3_A/H is a direct substitute with active product status. This part carries automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel packaging. The forward voltage specification differs at a higher test current (1.1 V @ 4 A versus 962 mV @ 2 A), but this represents a measurement at different operating conditions rather than a functional limitation. This part is suitable for applications requiring automotive-grade reliability.

AS4PM-M3/86A is a parametric equivalent with active product status and identical electrical specifications to the original AS4PMHM3/86A. This part maintains the same forward voltage characteristic (962 mV @ 2 A) and is supplied in Tape & Reel packaging. This part provides direct functional replacement with maximum inventory availability.

AS4PM-M3/87A is a parametric equivalent with active product status and identical electrical specifications to the original AS4PMHM3/86A. This part maintains the same forward voltage characteristic (962 mV @ 2 A) and is supplied in Tape & Reel packaging. This part provides direct functional replacement.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status, ensuring regulatory compliance across applications.

Frequently Asked Questions (FAQ)

Q: Can AS4PMHM3_A/H be used as a direct replacement for AS4PMHM3/86A?

A: Yes. AS4PMHM3_A/H is a direct substitute with identical voltage rating (1000 V), current rating (2.4 A), package type (TO-277, 3-PowerDFN), and reverse recovery time (1.8 µs). The forward voltage is specified at a different test current, but both parts operate within the same functional parameters for avalanche diode applications.

Q: What is the difference between AS4PM-M3/86A and AS4PM-M3/87A?

A: Both parts are parametric equivalents with identical electrical specifications. They share the same voltage rating (1000 V), current rating (2.4 A), forward voltage characteristic (962 mV @ 2 A), and package configuration (TO-277, 3-PowerDFN). The difference in part number designation reflects manufacturing or date code variations.

Q: Are all substitute parts available in the same packaging format?

A: The original AS4PMHM3/86A does not specify a packaging format in the provided data. All substitute parts (AS4PMHM3_A/H, AS4PM-M3/86A, AS4PM-M3/87A) are supplied in Tape & Reel (TR) packaging, which is standard for surface mount components in this category.

Q: Do the substitute parts meet the same compliance standards as the original part?

A: Yes. All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity level, and REACH unaffected status. AS4PMHM3_A/H additionally carries AEC-Q101 automotive qualification.

Q: What is the significance of the forward voltage difference in AS4PMHM3_A/H?

A: The forward voltage specification for AS4PMHM3_A/H (1.1 V @ 4 A) is measured at a higher current than the original part (962 mV @ 2 A). This reflects the test condition rather than a functional difference. Both specifications are within normal operating parameters for avalanche diodes in this voltage and current class.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts use the identical TO-277, 3-PowerDFN package and surface mount configuration. No PCB layout modifications are required for substitution.

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