Equivalent & Substitute Parts Reference for AR4PM-M3/86A

Part Overview

The AR4PM-M3/86A from Vishay General Semiconductor - Diodes Division is a fast-recovery avalanche diode used in high-voltage rectification applications. It offers a voltage rating of 1000 V and an average rectified current of 1.8A, packaged in a surface-mount TO-277A (SMPC) case. The part status is active, and it is RoHS3 compliant. Identifying alternative models is necessary for design flexibility, inventory management, and compatibility with existing assemblies, especially in cases where package type or terminal layout may vary among suppliers.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Technology	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	ECCN	HTSUS	Part Status
AR4PM-M3/86A	Vishay General Semiconductor - Diodes Division	Diodes, Rectifiers	Avalanche	1000 V	1.8A	1.9 V @ 4 A	Fast Recovery ≤ 500ns, > 200mA (Io)	120 ns	10 µA @ 1000 V	Surface Mount	TO-277A (SMPC)	TO-277A (SMPC)	-55°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0080	Active

Substitute Part Grouping Explanation

Diode, rectifier substitutes are selected strictly based on matched or higher values in key electrical and environmental parameters. The essential substitution criteria are: maximum DC reverse voltage, average rectified current, forward voltage at rated current, reverse recovery time, reverse leakage current, mounting type, package/case, RoHS and REACH compliance, operating temperature, and part status. Substitution is valid only where the replacement meets or exceeds these parameter requirements, and fits the application’s package and compliance needs.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	Part Status
AR4PM-M3/86A	Vishay General Semiconductor - Diodes Division	1000 V	1.8A	1.9 V @ 4 A	Fast Recovery ≤ 500ns, > 200mA (Io)	120 ns	10 µA @ 1000 V	Surface Mount	TO-277A (SMPC)	-55°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	Active
STTH310S	STMicroelectronics	1000 V	3A	1.7 V @ 3 A	Fast Recovery ≤ 500ns, > 200mA (Io)	75 ns	10 µA @ 1000 V	Surface Mount	DO-214AB, SMC	-40°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	Active

Engineering Selection Recommendations

Both AR4PM-M3/86A and STTH310S are listed as active components with ROHS3 and REACH compliance, MSL 1 (Unlimited), and operating temperature ranges suitable for high-reliability rectifier applications. ECCN and HTSUS classification are identical, ensuring regulatory parity. These conditions permit substituting STTH310S for AR4PM-M3/86A strictly on functional and compliance grounds.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters for substituting a surface-mount rectifier diode?
A1: Substitution requires matching or exceeding the maximum DC reverse voltage, average rectified current, forward voltage at rated current, reverse recovery time, reverse leakage current, mounting type, package/case, operating temperature, RoHS and REACH compliance, and part status.

Q2: Does the package/case affect the ability to substitute AR4PM-M3/86A with STTH310S?
A2: Yes. AR4PM-M3/86A uses a TO-277A (SMPC) package, while STTH310S uses DO-214AB (SMC). Substitution is feasible when the application supports different surface-mount footprints.

Q3: Does RoHS and REACH compliance need to be identical for valid substitutions?
A3: Yes. Both AR4PM-M3/86A and STTH310S are RoHS3 compliant and REACH unaffected, satisfying regulatory substitution requirements.

Q4: How does reverse recovery time influence substitution?
A4: Both parts are classified as fast recovery diodes. Reverse recovery time must meet the application's performance criteria; STTH310S features a lower trr, which is within the fast recovery classification.

Q5: Are there any differences in operating temperature ranges to consider?
A5: AR4PM-M3/86A operates from -55°C to 175°C, while STTH310S operates from -40°C to 175°C. The main temperature overlap supports most high-reliability applications.

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