AS1FDHM3/I Equivalent & Substitute Parts

Part Overview

The AS1FDHM3/I is an avalanche diode rated for 200 V DC reverse voltage and 1.5 A average rectified current, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount rectifier diode in DO-219AB package is designed for automotive applications and holds AEC-Q101 qualification. The part is currently active in production with 1,058 units in stock. Substitute parts are identified to address packaging format availability, inventory levels, and supply chain flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

AS1FDHM3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1139AS1FDHM3/I Datasheet

Current PartRFQ

AS1FD-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 17799AS1FD-M3/H Datasheet

Parametric EquivalentRFQ

AS1FDHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 9903AS1FDHM3/H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AS1FDHM3/I is determined by equivalence across the following critical parameters:

Electrical Specifications:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Current - Average Rectified (Io): 1.5 A
• Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 1.5 A
• Reverse Recovery Time (trr): 1.3 µs
• Current - Reverse Leakage @ Vr: 5 µA @ 200 V
• Capacitance @ Vr, F: 8.8 pF @ 4V, 1MHz

Mechanical & Environmental Specifications:

• Package / Case: DO-219AB (SMF)
• Operating Temperature - Junction: -55°C to 175°C
• Technology: Avalanche
• Grade: Automotive
• Qualification: AEC-Q101

The identified substitute parts AS1FD-M3/H and AS1FDHM3/H maintain identical electrical performance and environmental ratings. The primary difference between the main part and substitutes is the packaging format: the main part AS1FDHM3/I is supplied in Tape & Reel (TR) format, while the substitutes are available in Cut Tape (CT) format. Both packaging formats are suitable for surface mount assembly and do not affect component functionality or performance.

Parameter Comparison

Engineering Selection Recommendations

All three parts—AS1FDHM3/I, AS1FD-M3/H, and AS1FDHM3/H—are manufactured by Vishay General Semiconductor - Diodes Division and maintain active product status. Each part carries AEC-Q101 automotive qualification and is ROHS3 compliant with REACH unaffected status, making them suitable for automotive and industrial applications requiring regulatory compliance.

The AS1FDHM3/I and AS1FDHM3/H are functionally identical, differing only in packaging format (Tape & Reel versus Cut Tape). The AS1FD-M3/H is also functionally identical with the same packaging format as AS1FDHM3/H. Selection between these parts should be based on assembly process requirements and packaging format compatibility with manufacturing equipment.

For applications requiring Tape & Reel packaging, the AS1FDHM3/I is the appropriate selection. For applications compatible with Cut Tape format, either AS1FD-M3/H or AS1FDHM3/H may be selected based on inventory availability and lead time requirements. The substitute parts AS1FD-M3/H and AS1FDHM3/H offer significantly higher inventory levels (17,699 and 9,820 units respectively) compared to the main part (1,058 units), providing supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can AS1FD-M3/H or AS1FDHM3/H be used as direct replacements for AS1FDHM3/I?

A: Yes. All three parts are electrically and mechanically identical. The only difference is packaging format: AS1FDHM3/I is supplied in Tape & Reel format, while AS1FD-M3/H and AS1FDHM3/H are supplied in Cut Tape format. If your assembly process accommodates Cut Tape packaging, either substitute part is a direct replacement.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on a continuous reel suitable for automated pick-and-place assembly equipment. Cut Tape (CT) packaging supplies components on tape segments cut to specific lengths, typically used for manual assembly or lower-volume production. Both formats contain the same component in the same DO-219AB package.

Q: Are all three parts automotive qualified?

A: Yes. All three parts—AS1FDHM3/I, AS1FD-M3/H, and AS1FDHM3/H—carry AEC-Q101 qualification and automotive grade designation, making them suitable for automotive applications.

Q: Do the substitute parts have the same electrical performance?

A: Yes. The substitute parts AS1FD-M3/H and AS1FDHM3/H have identical electrical specifications to the main part AS1FDHM3/I, including reverse voltage rating (200 V), average rectified current (1.5 A), forward voltage (1.15 V @ 1.5 A), reverse recovery time (1.3 µs), and all other electrical parameters.

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

A: The operating temperature range for the junction is -55°C to 175°C for all three parts, providing wide thermal operating capability suitable for automotive and industrial environments.

Q: Are these parts RoHS and REACH compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic components.

Q: Which substitute part should I select if both are available?

A: Selection between AS1FD-M3/H and AS1FDHM3/H depends on your specific requirements. Both are electrically and mechanically identical. Consider inventory availability, lead time, and any supplier-specific factors. AS1FD-M3/H has higher inventory (17,699 units) compared to AS1FDHM3/H (9,820 units).