AS4PDHM3/87A Equivalent & Substitute Parts

Part Overview

The AS4PDHM3/87A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage and 2.4 A average rectified current in a surface mount TO-277A (SMPC) package. This component is part of the eSMP® series and is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	200 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 @ 200 V
Capacitance @ Vr, F	60 pF @ 4 V, 1 MHz
Package / Case	TO-277, 3-PowerDFN
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Avalanche
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AS4PDHM3/87A is determined by electrical and mechanical parameter equivalence within the avalanche diode category. The critical parameters governing substitution are:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 2.4 A
Reverse Recovery Time (trr): 1.8 µs
Current - Reverse Leakage @ Vr: 10 µA @ 200 V
Capacitance @ Vr, F: 60 pF @ 4 V, 1 MHz

Mechanical Parameters:

Package / Case: TO-277, 3-PowerDFN
Mounting Type: Surface Mount

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Operating Temperature - Junction: -55°C ~ 175°C

Substitute parts must maintain identical or equivalent electrical specifications and physical packaging to ensure direct functional replacement in circuit applications. The following parts meet these criteria:

Direct Manufacturer Equivalents:

AS4PDHM3_A/I (Automotive grade, AEC-Q101 qualified)
AS4PD-M3/86A (Parametric equivalent)
AS4PD-M3/87A (Parametric equivalent)

Parameter Comparison

Parameter	AS4PDHM3/87A	AS4PDHM3_A/I	AS4PD-M3/86A	AS4PD-M3/87A
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 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 @ 200 V	10 µA @ 200 V	10 µA @ 200 V	10 µA @ 200 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
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AS4PDHM3_A/I is suitable for applications requiring automotive-grade components with AEC-Q101 qualification. This part maintains all electrical parameters of the original AS4PDHM3/87A while offering active product status and automotive certification. The forward voltage specification differs at a higher test current (1.1 V @ 4 A versus 962 mV @ 2 A), but this represents measurement at different operating points rather than a functional deviation. Packaging is Tape & Reel (TR) format.

AS4PD-M3/86A and AS4PD-M3/87A are parametric equivalents with identical electrical specifications to the original part, including forward voltage characteristics (962 mV @ 2 A). Both parts are active products with ROHS3 compliance and Tape & Reel packaging. AS4PD-M3/86A offers higher inventory availability (4300 pcs) compared to AS4PD-M3/87A (998 pcs).

All substitute parts are manufactured by Vishay General Semiconductor - Diodes Division, maintain the eSMP® series designation, and are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can AS4PDHM3_A/I be used as a direct replacement for AS4PDHM3/87A?

A: Yes. AS4PDHM3_A/I maintains all critical electrical parameters: 200 V reverse voltage, 2.4 A average rectified current, 1.8 µs reverse recovery time, and identical package configuration (TO-277, 3-PowerDFN). The forward voltage specification is measured at a different current level (4 A versus 2 A) but does not affect functional compatibility. This part is active and carries automotive-grade qualification.

Q: What is the difference between AS4PD-M3/86A and AS4PD-M3/87A?

A: Both parts are parametric equivalents with identical electrical specifications and package configuration. The primary difference is inventory availability: AS4PD-M3/86A has 4300 pcs in stock while AS4PD-M3/87A has 998 pcs. Both are active products with ROHS3 compliance.

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

A: The original AS4PDHM3/87A packaging format is not specified in the provided data. All substitute parts (AS4PDHM3_A/I, AS4PD-M3/86A, AS4PD-M3/87A) are available in Tape & Reel (TR) format with TO-277, 3-PowerDFN package configuration. Confirm packaging requirements for your procurement process.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). All parts are REACH unaffected and classified under ECCN EAR99.

Q: Which substitute part should be selected for automotive applications?

A: AS4PDHM3_A/I is qualified for automotive applications with AEC-Q101 certification. This part maintains all electrical parameters of the original while offering active product status and automotive-grade qualification.

Q: Are there any electrical parameter differences between the substitute parts?

A: AS4PDHM3_A/I specifies forward voltage at 1.1 V @ 4 A, while AS4PD-M3/86A and AS4PD-M3/87A specify 962 mV @ 2 A. All other electrical parameters (reverse voltage, current rating, recovery time, leakage current, and capacitance) are identical across all parts.

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