RSFAL Equivalent & Substitute Parts Reference

Part Overview

The RSFAL is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 500 mA average rectified current. This Surface Mount Sub SMA device is designed for fast recovery applications with a reverse recovery time of 150 ns. The part is currently in Active product status and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design revisions necessitate component sourcing from alternative inventory channels while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.3 @ 500 mA	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5 @ 50 V	µA
Capacitance @ Vr, F	4 @ 4V, 1MHz	pF
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	DO-219AB	-
Supplier Device Package	Sub SMA	-
Technology	Standard	-
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the RSFAL rectifier diode is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for valid substitution:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 500 mA
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 500 mA
Reverse Recovery Time (trr): 150 ns
Current - Reverse Leakage @ Vr: 5 µA @ 50 V
Capacitance @ Vr, F: 4 pF @ 4V, 1MHz
Operating Temperature - Junction: -55°C to 150°C
Package / Case: DO-219AB
Supplier Device Package: Sub SMA
Mounting Type: Surface Mount
Technology: Standard
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts may differ only in packaging format (Tape & Reel versus Cut Tape) and product status designation, as these factors do not affect electrical performance or mechanical compatibility in the application circuit.

Parameter Comparison

Parameter	RSFAL MTG (Main)	RSFAL (Substitute)	RSFAL RVG (Substitute)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V
Current - Average Rectified (Io)	500 mA	500 mA	500 mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	1.3 V @ 500 mA	1.3 V @ 500 mA
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	150 ns	150 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V
Capacitance @ Vr, F	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-219AB	DO-219AB	DO-219AB
Supplier Device Package	Sub SMA	Sub SMA	Sub SMA
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Not For New Designs	Active
Packaging Format	Standard	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

All three part numbers—RSFAL MTG, RSFAL, and RSFAL RVG—are electrically and mechanically equivalent and interchangeable at the circuit level. Selection between these parts is determined by manufacturing and sourcing requirements rather than performance characteristics.

RSFAL MTG (Primary Selection): This part maintains Active product status and is suitable for new designs and ongoing production. It is the preferred choice when available.

RSFAL RVG (Recommended Substitute): This part also maintains Active product status and is available in Cut Tape packaging format. It provides an alternative sourcing option with identical electrical specifications and compliance certifications. This part is suitable for new designs and ongoing production.

RSFAL (Secondary Substitute): This part is designated as Not For New Designs and is available in Tape & Reel packaging format. It is suitable only for replacement, repair, or continuation of existing production runs where component inventory must be maintained. This part should not be selected for new circuit designs.

All parts comply with RoHS3 regulations, maintain MSL 1 (Unlimited) moisture sensitivity rating, and are REACH Unaffected. Selection between packaging formats (standard, Tape & Reel, or Cut Tape) depends on assembly equipment compatibility and production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can RSFAL RVG be used as a direct replacement for RSFAL MTG in existing designs?

A: Yes. RSFAL RVG is electrically and mechanically equivalent to RSFAL MTG. Both parts share identical electrical parameters, operating temperature range, package type (DO-219AB Sub SMA), and compliance certifications. The only difference is packaging format (Cut Tape versus standard). Direct substitution is valid at the circuit level.

Q: What is the difference between the packaging formats offered?

A: RSFAL MTG is supplied in standard packaging format. RSFAL is supplied in Tape & Reel (TR) format, which is typically used for high-volume automated assembly. RSFAL RVG is supplied in Cut Tape (CT) format, which is used for lower-volume or mixed-component assembly operations. All three formats contain the identical diode component in DO-219AB Sub SMA package.

Q: Why is RSFAL marked as Not For New Designs?

A: Product status designations reflect manufacturer lifecycle management. Parts marked Not For New Designs are typically in mature or declining production phases. While RSFAL remains functionally equivalent and available in inventory, new circuit designs should prioritize parts with Active status, such as RSFAL MTG or RSFAL RVG, to ensure long-term supply continuity.

Q: Are all three parts RoHS3 compliant?

A: Yes. RSFAL MTG, RSFAL, and RSFAL RVG are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts are REACH Unaffected. Compliance certifications are identical across all three part numbers.

Q: What is the reverse recovery time specification, and why is it important?

A: The reverse recovery time (trr) is 150 ns for all three parts. This parameter defines the time required for the diode to transition from forward conduction to reverse blocking state. The 150 ns specification classifies these parts as Fast Recovery diodes, suitable for switching applications where rapid diode turn-off is required to minimize switching losses and electromagnetic interference.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: Yes. All three parts are classified as Fast Recovery diodes with identical reverse recovery time (150 ns) and capacitance specifications (4 pF @ 4V, 1MHz). These electrical characteristics are maintained across RSFAL MTG, RSFAL, and RSFAL RVG, making them suitable for equivalent performance in high-frequency switching circuits.

Q: What inventory levels are available for each part number?

A: RSFAL MTG has 889 pieces in stock. RSFAL has 9885 pieces in stock. RSFAL RVG has 7680 pieces in stock. Inventory levels are subject to change and should be verified at time of procurement.

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