AR3PM-M3/86A Equivalent & Substitute Parts

Part Overview

The AR3PM-M3/86A is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 1.6 A average rectified current in a surface mount TO-277A (SMPC) package. This component is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The part is supplied in Tape & Reel (TR) packaging format.

Equivalent and substitute parts are identified when alternative components meet or exceed the electrical and mechanical specifications of the primary part, enabling procurement flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1.6	A
Voltage - Forward (Vf) (Max) @ If	1.9 V @ 3 A	V
Reverse Recovery Time (trr)	120	ns
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Capacitance @ Vr, F	34	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 175	°C
Package / Case	TO-277, 3-PowerDFN	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the AR3PM-M3/86A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Current - Average Rectified (Io): Must equal or exceed 1.6 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.9 V @ 3 A
Reverse Recovery Time (trr): Must not exceed 120 ns
Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 1000 V

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Operating Temperature - Junction: Must encompass or exceed -55°C to 175°C range
RoHS Status: ROHS3 Compliant

Package Consideration: Package form factor (TO-277A versus SMC) represents a mechanical difference that may require PCB layout modification. Electrical performance equivalence does not guarantee direct pin-for-pin compatibility without design review.

Parameter Comparison

Parameter	AR3PM-M3/86A (Main Part)	STTH310S (Substitute)	Compatibility Status
Manufacturer	Vishay General Semiconductor - Diodes Division	STMicroelectronics	Different Manufacturer
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	Equal
Current - Average Rectified (Io)	1.6 A	3 A	Substitute Exceeds
Voltage - Forward (Vf) (Max) @ If	1.9 V @ 3 A	1.7 V @ 3 A	Substitute Superior
Reverse Recovery Time (trr)	120 ns	75 ns	Substitute Superior
Current - Reverse Leakage @ Vr	10 µA @ 1000 V	10 µA @ 1000 V	Equal
Operating Temperature - Junction	-55°C to 175°C	-40°C to 175°C	Substitute Range Narrower
Package / Case	TO-277, 3-PowerDFN	DO-214AB, SMC	Different Package
Mounting Type	Surface Mount	Surface Mount	Compatible
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Compatible
Product Status	Active	Active	Both Active

Engineering Selection Recommendations

STTH310S Substitution Assessment:

The STTH310S from STMicroelectronics meets all critical electrical parameters required for substitution of the AR3PM-M3/86A. The substitute part demonstrates superior performance in forward voltage drop (1.7 V versus 1.9 V) and reverse recovery time (75 ns versus 120 ns), indicating enhanced switching efficiency and reduced switching losses.

Both parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment. Both components carry MSL 1 (Unlimited) moisture sensitivity classification.

Package Transition Consideration:

The AR3PM-M3/86A utilizes TO-277A (SMPC) packaging, while the STTH310S employs DO-214AB (SMC) packaging. These are distinct surface mount packages with different footprints and pin configurations. Substitution requires PCB layout modification and design validation to accommodate the alternative package geometry.

Operating Temperature Range:

The AR3PM-M3/86A supports operation from -55°C to 175°C, while the STTH310S operates from -40°C to 175°C. Applications requiring operation below -40°C junction temperature must retain the original AR3PM-M3/86A specification.

Frequently Asked Questions (FAQ)

Q: Can STTH310S be used as a direct replacement for AR3PM-M3/86A without PCB modification?

A: No. While the electrical specifications are compatible, the package types differ (TO-277A versus SMC). Direct PCB substitution is not possible without footprint redesign and layout modification.

Q: What are the primary electrical advantages of STTH310S over AR3PM-M3/86A?

A: The STTH310S provides lower forward voltage drop (1.7 V versus 1.9 V at 3 A) and faster reverse recovery time (75 ns versus 120 ns), resulting in reduced power dissipation and improved switching performance.

Q: Are both parts suitable for high-temperature applications above 150°C?

A: Yes. Both the AR3PM-M3/86A and STTH310S support junction temperatures up to 175°C, making them suitable for elevated temperature environments within this range.

Q: Does the higher current rating of STTH310S (3 A versus 1.6 A) affect circuit compatibility?

A: Higher current rating indicates greater current handling capacity. The STTH310S can safely conduct the 1.6 A required by circuits designed for the AR3PM-M3/86A. Circuit compatibility is maintained when voltage and thermal characteristics are satisfied.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. No regulatory or compliance barriers exist for substitution from a compliance perspective.

Q: What inventory status should be considered for procurement decisions?

A: The AR3PM-M3/86A has 3,100 pieces in stock, while STTH310S has 17,310 pieces available. The STTH310S offers significantly higher inventory availability for supply chain continuity.

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