AS4PJHM3_A/I Equivalent & Substitute Parts

Part Overview

The AS4PJHM3_A/I is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 600V DC reverse voltage with 2.4A 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 642 pieces in stock.

Substitute parts are identified when electrical characteristics, mechanical packaging, and compliance certifications remain identical across different manufacturing lots or tape & reel configurations. Locating equivalent parts becomes necessary when primary inventory is depleted, supply chain disruptions occur, or alternative sourcing is required for production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	2.4	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 4	V @ A
Reverse Recovery Time (trr)	1.8	µs
Current - Reverse Leakage @ Vr	10 @ 600	µA @ V
Capacitance @ Vr, F	60 @ 4V, 1MHz	pF
Package / Case	TO-277, 3-PowerDFN	—
Operating Temperature - Junction	-55 to 175	°C
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the AS4PJHM3_A/I is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 2.4 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 4 A
Reverse Recovery Time (trr): 1.8 µs
Current - Reverse Leakage @ Vr: 10 µA @ 600 V
Capacitance @ Vr, F: 60 pF @ 4V, 1MHz

Mechanical Equivalence Criteria:

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

Compliance Equivalence Criteria:

Technology: Avalanche
Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must match all parameters listed above. Variations in tape & reel configuration or manufacturing lot designation do not affect substitution eligibility when all electrical, mechanical, and compliance parameters remain identical.

Parameter Comparison

Parameter	AS4PJHM3_A/I	AS4PJHM3_A/H	Match
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	✓
Category	Diodes, Rectifiers	Diodes, Rectifiers	✓
Technology	Avalanche	Avalanche	✓
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	✓
Current - Average Rectified (Io)	2.4 A	2.4 A	✓
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A	1.1 V @ 4 A	✓
Reverse Recovery Time (trr)	1.8 µs	1.8 µs	✓
Current - Reverse Leakage @ Vr	10 µA @ 600 V	10 µA @ 600 V	✓
Capacitance @ Vr, F	60 pF @ 4V, 1MHz	60 pF @ 4V, 1MHz	✓
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	✓
Mounting Type	Surface Mount	Surface Mount	✓
Supplier Device Package	TO-277A (SMPC)	TO-277A (SMPC)	✓
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	✓
Grade	Automotive	Automotive	✓
Qualification	AEC-Q101	AEC-Q101	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Active	Active	✓
Series	eSMP®	eSMP®	✓
Base Product Number	AS4	AS4	✓

Engineering Selection Recommendations

Both AS4PJHM3_A/I and AS4PJHM3_A/H are active production parts manufactured by Vishay General Semiconductor - Diodes Division. Both components carry identical electrical specifications, mechanical packaging, and automotive-grade certifications including AEC-Q101 qualification and ROHS3 compliance.

The AS4PJHM3_A/H offers higher inventory availability (5543 pieces in stock) compared to the AS4PJHM3_A/I (642 pieces in stock). Both parts are suitable for direct substitution in applications requiring 600V avalanche diodes with 2.4A average rectified current in TO-277A surface mount packages.

Selection between these parts should be based on supply chain requirements and inventory status. No electrical or mechanical re-qualification is necessary when substituting between these parts, as all parameters remain identical.

Frequently Asked Questions (FAQ)

Q: Can AS4PJHM3_A/H be used as a direct replacement for AS4PJHM3_A/I?

A: Yes. Both parts are parametrically identical across all electrical characteristics, mechanical packaging, and compliance certifications. Direct substitution is supported without circuit modification or re-qualification.

Q: What is the difference between the /I and /H designations?

A: The /I and /H designations represent different tape & reel manufacturing lots or configurations from Vishay. These designations do not indicate differences in electrical performance, package type, or compliance status.

Q: Are both parts suitable for automotive applications?

A: Yes. Both AS4PJHM3_A/I and AS4PJHM3_A/H are automotive-grade components qualified to AEC-Q101 and are ROHS3 compliant.

Q: What is the TO-277A (SMPC) package?

A: TO-277A (SMPC) is a surface mount power diode package with three leads in a PowerDFN configuration. Both substitute parts use this identical package.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts have identical footprints, pin configurations, and mounting requirements for surface mount assembly.

Q: What is the operating temperature range for these diodes?

A: Both parts operate across a junction temperature range of -55°C to 175°C, suitable for automotive and industrial applications.

Q: Are there any moisture sensitivity concerns with these parts?

A: Both parts carry Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life without moisture control requirements.

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