AU3PMHM3_A/I Equivalent & Substitute Parts

Part Overview

The AU3PMHM3_A/I is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage with 1.4 A average rectified current. This surface mount component is housed in a TO-277A (SMPC) package and is qualified to AEC-Q101 automotive standards. The part is currently active in production with 810 pieces available in inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters. Alternative part numbers may be required due to inventory availability, supply chain considerations, or specific procurement requirements while maintaining identical functional specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1.4	A
Voltage - Forward (Vf) (Max) @ If	2.5 @ 3	V @ A
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10 @ 1000	µA @ V
Capacitance @ Vr, F	42 @ 4, 1	pF @ V, MHz
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 AU3PMHM3_A/I is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1.4 A
Voltage - Forward (Vf) (Max) @ If: 2.5 V @ 3 A
Reverse Recovery Time (trr): 75 ns
Current - Reverse Leakage @ Vr: 10 µA @ 1000 V
Capacitance @ Vr, F: 42 pF @ 4 V, 1 MHz

Mechanical Specifications:

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

Compliance & Qualification:

Technology: Avalanche
Series: eSMP®
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts must maintain identical values across all listed parameters to ensure direct functional and mechanical compatibility without circuit redesign or board layout modification.

Parameter Comparison

Parameter	AU3PMHM3_A/I	AU3PM-M3/86A	Match
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Yes
Category	Diodes, Rectifiers	Diodes, Rectifiers	Yes
Technology	Avalanche	Avalanche	Yes
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	Yes
Current - Average Rectified (Io)	1.4 A	1.4 A	Yes
Voltage - Forward (Vf) (Max) @ If	2.5 V @ 3 A	2.5 V @ 3 A	Yes
Reverse Recovery Time (trr)	75 ns	75 ns	Yes
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	Yes
Capacitance @ Vr, F	42 pF @ 4 V, 1 MHz	42 pF @ 4 V, 1 MHz	Yes
Series	eSMP®	eSMP®	Yes
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	Yes
Supplier Device Package	TO-277A (SMPC)	TO-277A (SMPC)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Yes
REACH Status	REACH Unaffected	REACH Unaffected	Yes
Product Status	Active	Active	Yes

Engineering Selection Recommendations

Both the AU3PMHM3_A/I and AU3PM-M3/86A are active production parts manufactured by Vishay General Semiconductor - Diodes Division. Both parts are qualified to AEC-Q101 automotive standards and maintain identical electrical and mechanical specifications across all critical parameters.

Selection between these parts is based on availability and procurement requirements:

AU3PMHM3_A/I: 810 pieces currently in stock. Primary part number for new designs and standard procurement.

AU3PM-M3/86A: 9718 pieces currently in stock. Substitute part number offering significantly higher inventory availability. Suitable for high-volume production runs or when primary part number stock is insufficient.

Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity classification. No circuit redesign, board layout modification, or thermal management changes are required when substituting between these part numbers. Direct pin-for-pin and functional replacement is supported.

Frequently Asked Questions (FAQ)

Q: Can AU3PM-M3/86A be used as a direct replacement for AU3PMHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. Direct substitution is supported without circuit modification or board layout changes.

Q: Are there any differences in package dimensions or pin configuration?

A: No. Both parts use the TO-277A (SMPC) package with identical 3-PowerDFN case dimensions and pin assignments.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both AU3PMHM3_A/I and AU3PM-M3/86A are qualified to AEC-Q101 automotive standards.

Q: What is the difference between these part numbers?

A: The part numbers differ only in their internal Vishay designation codes. The electrical specifications, performance characteristics, and physical packaging are identical.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity classification.

Q: Which part should be selected for new designs?

A: Selection is based on inventory availability and procurement lead time requirements. Both parts are equally suitable for new designs. The AU3PMHM3_A/I is the primary part number; AU3PM-M3/86A is the substitute when higher stock quantities are required.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts are functionally and mechanically identical and can be used interchangeably within the same assembly without performance impact.

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