RS1FD-M3/I Equivalent & Substitute Parts

Part Overview

The RS1FD-M3/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 200 V DC reverse voltage with 1 A average rectified current and features fast recovery characteristics. The device is packaged in DO-219AB (SMF) format and is classified as an active product with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters. This ensures functional interchangeability in circuit applications without performance degradation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.25 @ 1 A	V
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5 @ 200 V	µA
Capacitance @ Vr, F	5 @ 4V, 1MHz	pF
Package / Case	DO-219AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitute parts for the RS1FD-M3/I are identified based on strict equivalence across all electrical and mechanical parameters. The substitution criteria include:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 1 A
Reverse Recovery Time (trr): 500 ns
Current - Reverse Leakage @ Vr: 5 µA @ 200 V
Capacitance @ Vr, F: 5 pF @ 4V, 1MHz
Package / Case: DO-219AB
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
Technology: Standard

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. The RS1FD-M3/H meets all specified criteria and is therefore a valid substitute for the RS1FD-M3/I.

Parameter Comparison

Parameter	RS1FD-M3/I	RS1FD-M3/H	Match
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Yes
Category	Diodes, Rectifiers	Diodes, Rectifiers	Yes
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	Yes
Current - Average Rectified (Io)	1 A	1 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 1 A	1.25 V @ 1 A	Yes
Reverse Recovery Time (trr)	500 ns	500 ns	Yes
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	Yes
Capacitance @ Vr, F	5 pF @ 4V, 1MHz	5 pF @ 4V, 1MHz	Yes
Package / Case	DO-219AB	DO-219AB	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	Yes
Technology	Standard	Standard	Yes
Product Status	Active	Active	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
REACH Status	REACH Unaffected	REACH Unaffected	Yes

Engineering Selection Recommendations

The RS1FD-M3/H is a direct parametric equivalent to the RS1FD-M3/I. Both devices are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, package format, and operating characteristics.

Selection Basis:

Both parts maintain active product status, ensuring continued manufacturer support and availability. Both are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.

The RS1FD-M3/H offers significantly higher inventory availability (30,721 pcs) compared to the RS1FD-M3/I (764 pcs), which may influence supply chain decisions. The RS1FD-M3/H includes specified Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating superior moisture handling characteristics during storage and handling.

Selection between these parts depends on supply availability, lead time requirements, and specific moisture sensitivity requirements for the application. Both parts are functionally interchangeable in all circuit applications where the RS1FD-M3/I is specified.

Frequently Asked Questions (FAQ)

Q: Can the RS1FD-M3/H be used as a direct replacement for the RS1FD-M3/I?

A: Yes. The RS1FD-M3/H is a parametric equivalent with identical electrical specifications, reverse voltage rating, forward current rating, recovery time, leakage current, and capacitance characteristics. Both devices use the same DO-219AB package and surface mount technology.

Q: Are there any differences in compliance or certification between these parts?

A: Both parts are RoHS3 compliant and REACH unaffected. The RS1FD-M3/H includes an MSL rating of 1 (Unlimited), which specifies moisture sensitivity handling requirements. This additional specification does not affect functional equivalence.

Q: What is the significance of the different part number suffixes (M3/I versus M3/H)?

A: The suffix designates the packaging or tape configuration variant. Both parts are functionally identical in electrical performance and mechanical compatibility. The suffix difference reflects manufacturing or distribution packaging options only.

Q: Are these parts suitable for high-temperature applications?

A: Both parts operate across the junction temperature range of -55°C to 150°C, supporting applications requiring extended temperature performance within this range.

Q: What is the package format for these diodes?

A: Both parts use the DO-219AB (SMF) surface mount package format, suitable for automated assembly on printed circuit boards.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The identical electrical parameters, package format, and mounting type ensure functional interchangeability without circuit modification or performance impact.

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