RSFGL RFG Equivalent & Substitute Parts

Part Overview

The RSFGL RFG is a general-purpose fast recovery diode rated for 400 V DC reverse voltage and 500 mA average rectified current in a Sub SMA surface mount package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as Active product status and is ROHS3 compliant. The need for equivalent and substitute parts arises from inventory availability, packaging format requirements, and design flexibility across manufacturing batches and procurement cycles.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Capacitance @ Vr, F	4pF @ 4V, 1MHz
Package / Case	DO-219AB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RSFGL RFG is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 500 mA minimum
Package / Case: DO-219AB (Sub SMA form factor)
Mounting Type: Surface Mount

Parametric Equivalent Parts maintain identical electrical specifications and differ only in packaging format (Tape & Reel or Cut Tape) or product status designation. These parts are direct functional replacements with no performance variation.

Similar Parts share the same reverse voltage rating and package form factor but feature higher current ratings (700 mA) and different speed characteristics (Standard Recovery >500ns versus Fast Recovery ≤500ns). These parts are compatible for applications where the higher current capacity and different recovery speed do not create circuit conflicts.

Parameter Comparison

Parameter	RSFGL RFG	RSFGL	RSFGL RVG	S07G-GS08	S07G-GS18
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	500 mA	500 mA	500 mA	700 mA	700 mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	1.3 V @ 500 mA	1.3 V @ 500 mA	1.1 V @ 1 A	1.1 V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	150 ns	150 ns	150 ns	1.8 µs	1.8 µs
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	10 µA @ 400 V	10 µA @ 200 V
Capacitance @ Vr, F	4pF @ 4V, 1MHz	4pF @ 4V, 1MHz	4pF @ 4V, 1MHz	4pF @ 4V, 1MHz	4pF @ 4V, 1MHz
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Active	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Parametric Equivalent Selection (RSFGL and RSFGL RVG):

RSFGL and RSFGL RVG are direct parametric equivalents to RSFGL RFG, maintaining identical electrical performance across all specified parameters. Both parts are ROHS3 compliant and carry MSL 1 rating. RSFGL RVG is designated as Active product status and is supplied in Cut Tape packaging format. RSFGL carries Not For New Designs status and is supplied in Tape & Reel format. Selection between these parametric equivalents depends on packaging requirements and long-term design support considerations.

Similar Part Selection (S07G-GS08 and S07G-GS18):

S07G-GS08 and S07G-GS18 are manufactured by Vishay General Semiconductor - Diodes Division and share the 400 V reverse voltage rating and DO-219AB package form factor with the RSFGL RFG. These parts feature higher average rectified current ratings of 700 mA and standard recovery speed characteristics (1.8 µs trr) compared to the fast recovery specification (150 ns trr) of the RSFGL RFG. Both S07G-GS08 and S07G-GS18 carry Active product status, AEC-Q101 automotive qualification, and ROHS3 compliance. Selection of these similar parts is appropriate for applications where the higher current capacity is beneficial and the slower recovery time does not introduce circuit performance degradation.

Frequently Asked Questions (FAQ)

Q: Can RSFGL RVG be used as a direct replacement for RSFGL RFG?

A: Yes. RSFGL RVG is a parametric equivalent with identical electrical specifications. The difference is packaging format: RSFGL RVG is supplied in Cut Tape format while RSFGL RFG is supplied in standard packaging. Both maintain 400 V reverse voltage, 500 mA current rating, 150 ns reverse recovery time, and all other electrical parameters.

Q: What is the difference between RSFGL RFG and S07G-GS08?

A: Both parts share 400 V reverse voltage rating and DO-219AB package form factor. Key differences are: S07G-GS08 has 700 mA current rating versus 500 mA for RSFGL RFG; S07G-GS08 has 1.8 µs reverse recovery time versus 150 ns for RSFGL RFG (standard recovery versus fast recovery). S07G-GS08 carries AEC-Q101 automotive qualification. Selection depends on whether the higher current capacity and different speed characteristics are compatible with circuit requirements.

Q: Are S07G-GS08 and S07G-GS18 interchangeable with each other?

A: S07G-GS08 and S07G-GS18 are both manufactured by Vishay with identical electrical specifications: 400 V reverse voltage, 700 mA current rating, 1.8 µs reverse recovery time, and DO-219AB package. The difference is reverse leakage current measurement point: S07G-GS08 specifies 10 µA @ 400 V while S07G-GS18 specifies 10 µA @ 200 V. Both are Active product status with AEC-Q101 qualification.

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

A: RSFGL carries Not For New Designs status, indicating it is a legacy product designation. For new design implementations, RSFGL RVG (Active status) is the recommended parametric equivalent from Taiwan Semiconductor Corporation.

Q: What packaging formats are available for equivalent parts?

A: RSFGL RFG is supplied in standard packaging. RSFGL is supplied in Tape & Reel (TR) format. RSFGL RVG is supplied in Cut Tape (CT) format. All three maintain identical electrical specifications and DO-219AB package form factor. Selection of packaging format depends on manufacturing assembly requirements and procurement volume.

Q: Can I use S07G-GS08 in a circuit designed for RSFGL RFG?

A: S07G-GS08 is compatible from a voltage and package perspective (both 400 V, DO-219AB). However, the higher current rating (700 mA versus 500 mA) and significantly different recovery time (1.8 µs versus 150 ns) must be evaluated against circuit requirements. The slower recovery speed may affect switching performance in high-frequency applications. Forward voltage is also lower (1.1 V @ 1 A versus 1.3 V @ 500 mA), which affects power dissipation characteristics.

Q: Are all listed parts ROHS3 compliant?

A: Yes. RSFGL RFG, RSFGL, RSFGL RVG, S07G-GS08, and S07G-GS18 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

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