Equivalent & Substitute Parts for AS3PDHM3/87A

Part Overview

The AS3PDHM3/87A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage with 2.1 A average rectified current in a surface mount TO-277A (SMPC) package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design support and procurement requirements. The part belongs to the eSMP® series and carries automotive-grade qualification under AEC-Q101 standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	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 @ 200 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

Substitute Part Grouping Explanation

Substitution of the AS3PDHM3/87A is determined by equivalence across the following critical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 2.1 A
Reverse Recovery Time (trr): 1.2 µs
Current - Reverse Leakage @ Vr: 10 µA @ 200 V
Capacitance @ Vr, F: 37 pF @ 4V, 1MHz
Operating Temperature - Junction: -55°C to 175°C

Mechanical Parameters:

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

Compliance Parameters:

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

Substitute parts must maintain identical electrical ratings, mechanical compatibility, and automotive qualification status. Variations in forward voltage characteristics and packaging format (Tape & Reel versus bulk) do not preclude substitution when all other parameters align.

Parameter Comparison

Parameter	AS3PDHM3/87A (Main)	AS3PDHM3_A/I	AS3PD-M3/86A	AS3PD-M3/87A
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 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 @ 200 V	10 µA @ 200 V	10 µA @ 200 V	10 µA @ 200 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
Series	eSMP®	eSMP®	eSMP®	eSMP®
Technology	Avalanche	Avalanche	Avalanche	Avalanche
Grade	Automotive	Automotive	Not specified	Not specified
Qualification	AEC-Q101	AEC-Q101	Not specified	Not specified
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

AS3PDHM3_A/I is the primary direct substitute for AS3PDHM3/87A. Both parts maintain identical electrical specifications, automotive-grade qualification, and AEC-Q101 certification. The AS3PDHM3_A/I is currently active in production with higher inventory availability (883 Pcs). The forward voltage characteristic differs at a different test current (1.1 V @ 3 A versus 920 mV @ 1.5 A), but this represents a measurement at a different operating point rather than a functional incompatibility. Packaging format differs (Tape & Reel versus bulk), which affects procurement and assembly processes but not electrical performance.

AS3PD-M3/86A and AS3PD-M3/87A are parametric equivalents with identical electrical ratings and mechanical compatibility. Both parts are active in production with substantial inventory (722 Pcs and 1004 Pcs respectively). These alternatives lack explicit automotive grade and AEC-Q101 qualification documentation in the provided specifications. Selection of these parts requires confirmation that automotive qualification is not a mandatory requirement for the application.

For applications requiring maintained automotive qualification and AEC-Q101 certification, AS3PDHM3_A/I is the recommended substitute. For applications where automotive qualification is not required, AS3PD-M3/86A and AS3PD-M3/87A provide equivalent electrical performance with superior inventory availability.

Frequently Asked Questions (FAQ)

Q: Can AS3PDHM3_A/I be used as a direct replacement for AS3PDHM3/87A?

A: Yes. Both parts share identical voltage ratings (200 V), current ratings (2.1 A), reverse recovery time (1.2 µs), reverse leakage current (10 µA @ 200 V), capacitance (37 pF @ 4V, 1MHz), operating temperature range (-55°C to 175°C), and package type (TO-277A SMPC). Both maintain automotive-grade qualification and AEC-Q101 certification. The forward voltage is specified at different test currents but does not affect substitution compatibility.

Q: What is the difference between AS3PDHM3_A/I and AS3PD-M3/86A?

A: The primary difference is automotive qualification status. AS3PDHM3_A/I explicitly carries automotive-grade designation and AEC-Q101 qualification. AS3PD-M3/86A does not include these qualifications in the provided specifications. All electrical parameters and mechanical specifications are identical. Selection depends on whether automotive qualification is required for the application.

Q: Are there packaging differences between the substitute parts?

A: The main part AS3PDHM3/87A is supplied in bulk packaging. All substitute parts (AS3PDHM3_A/I, AS3PD-M3/86A, AS3PD-M3/87A) are supplied in Tape & Reel (TR) format. This affects procurement and assembly processes but does not impact electrical performance or mechanical compatibility. The physical package type (TO-277A SMPC) remains identical across all parts.

Q: Can AS3PD-M3/86A or AS3PD-M3/87A be used in automotive applications?

A: These parts meet all electrical and mechanical specifications required for the application. However, explicit automotive-grade qualification and AEC-Q101 certification are not documented in the provided specifications. Use in automotive applications requires confirmation that these qualifications are not mandatory for the specific application or that alternative qualification documentation is available.

Q: What parameters must remain constant for substitution?

A: Substitution requires equivalence in voltage rating (200 V), current rating (2.1 A), reverse recovery time (1.2 µs), reverse leakage current (10 µA @ 200 V), capacitance (37 pF @ 4V, 1MHz), operating temperature range (-55°C to 175°C), and package type (TO-277A SMPC). Forward voltage characteristics may be specified at different test points without affecting substitution validity.

Q: Is the AS3PDHM3/87A still available for purchase?

A: The AS3PDHM3/87A is discontinued at DiGi Electronics. However, 857 Pcs are reported as new original in stock. Substitute parts AS3PDHM3_A/I (883 Pcs), AS3PD-M3/86A (722 Pcs), and AS3PD-M3/87A (1004 Pcs) are all active in production with higher inventory levels.

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