RSFGL RQG Equivalent & Substitute Parts

Part Overview

The RSFGL RQG is a general-purpose fast recovery rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 500 mA average rectified current. This Surface Mount Sub SMA device is designed for applications requiring fast switching characteristics with a reverse recovery time of 150 ns. The part is currently in Active product status with 659 pieces available in inventory.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, support different packaging formats, and address product lifecycle transitions. Alternative devices maintain electrical compatibility within specified parameter ranges while offering different manufacturers, packaging options, or enhanced specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	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 @ 400 V	µA
Mounting Type	Surface Mount	—
Package / Case	DO-219AB	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the RSFGL RQG are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 400 V reverse voltage rating, 500 mA average rectified current, 1.3 V forward voltage at 500 mA, 150 ns reverse recovery time, and 5 µA reverse leakage current at 400 V. These parts differ only in packaging format (Tape & Reel or Cut Tape) or product lifecycle status. Parametric equivalents include RSFGL (Tape & Reel packaging) and RSFGL RVG (Cut Tape packaging).

Similar Parts share the same 400 V reverse voltage rating and DO-219AB package but feature higher current ratings (700 mA versus 500 mA) and different recovery characteristics. These parts are suitable for applications where the higher current capacity provides design margin or where the application does not require the fast recovery speed of the primary device. Similar parts include S07G-GS08 and S07G-GS18 from Vishay General Semiconductor - Diodes Division.

Substitution eligibility is determined by: (1) matching or exceeding the 400 V reverse voltage requirement, (2) current rating equal to or greater than 500 mA, (3) compatible Surface Mount package format, and (4) operating temperature range encompassing -55°C to 150°C.

Parameter Comparison

Parameter	RSFGL RQG	RSFGL	RSFGL RVG	S07G-GS08	S07G-GS18
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Taiwan Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
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	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Standard Recovery > 500ns, > 200mA	Standard Recovery > 500ns, > 200mA
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 @ 400 V
Capacitance @ Vr, F	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 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

For Direct Replacement (Parametric Equivalents):

RSFGL RVG in Cut Tape packaging is the preferred parametric equivalent for the RSFGL RQG. Both devices maintain identical electrical specifications including 400 V reverse voltage, 500 mA current rating, 1.3 V forward voltage, and 150 ns reverse recovery time. RSFGL RVG is in Active product status with 14,414 pieces in inventory, providing supply continuity. The Cut Tape packaging format accommodates automated assembly processes requiring individual component feeding.

RSFGL in Tape & Reel packaging is an alternative parametric equivalent with identical electrical performance. However, this part carries a "Not For New Designs" product status designation, indicating it is in product lifecycle transition. RSFGL remains suitable for sustaining production of existing designs but should not be selected for new development projects.

For Higher Current Applications (Similar Parts):

S07G-GS08 and S07G-GS18 from Vishay General Semiconductor - Diodes Division are suitable alternatives when application requirements permit higher current capacity (700 mA versus 500 mA). Both parts maintain the 400 V reverse voltage rating and DO-219AB package compatibility. These devices feature standard recovery characteristics (1.8 µs reverse recovery time) rather than fast recovery, resulting in lower forward voltage (1.1 V @ 1 A) and higher reverse leakage current (10 µA @ 400 V). Both parts carry Active product status and AEC-Q101 automotive qualification. S07G-GS08 has 658,490 pieces in inventory; S07G-GS18 has 95,100 pieces in inventory.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the primary device. All parts are classified under ECCN EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

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

A: Yes. RSFGL RVG is a parametric equivalent with identical electrical specifications: 400 V reverse voltage, 500 mA average rectified current, 1.3 V forward voltage at 500 mA, and 150 ns reverse recovery time. The only difference is packaging format (Cut Tape versus the original packaging). Both devices are in Active product status and ROHS3 compliant.

Q: What is the difference between RSFGL and RSFGL RQG?

A: RSFGL and RSFGL RQG are parametric equivalents with identical electrical specifications. RSFGL is supplied in Tape & Reel packaging and carries a "Not For New Designs" product status. RSFGL RQG is the current active variant. For new designs, RSFGL RQG or RSFGL RVG are recommended.

Q: Can S07G-GS08 or S07G-GS18 replace RSFGL RQG in all applications?

A: S07G-GS08 and S07G-GS18 are suitable substitutes only when application requirements accommodate the following differences: higher current rating (700 mA versus 500 mA), standard recovery speed (1.8 µs versus 150 ns fast recovery), lower forward voltage (1.1 V @ 1 A), and higher reverse leakage current (10 µA versus 5 µA). Applications requiring fast switching characteristics or strict leakage specifications should not use these alternatives.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the DO-219AB package (Sub SMA / SMF format) and are Surface Mount devices. Packaging format variations (Tape & Reel, Cut Tape) affect component handling and assembly processes but do not alter electrical performance or physical footprint.

Q: What is the significance of the "Not For New Designs" status on RSFGL?

A: "Not For New Designs" indicates the part is in product lifecycle transition and may have limited future availability. While RSFGL remains functionally equivalent to RSFGL RQG, new product designs should specify RSFGL RQG or RSFGL RVG to ensure long-term supply continuity and support.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts listed are ROHS3 compliant, have Moisture Sensitivity Level 1 (Unlimited), and are REACH Unaffected. S07G-GS08 and S07G-GS18 additionally carry AEC-Q101 automotive qualification, providing enhanced reliability certification for automotive applications.

Q: What is the primary reason to select S07G-GS08 or S07G-GS18 over RSFGL RQG?

A: S07G-GS08 and S07G-GS18 are selected when applications require higher current capacity (700 mA) or when standard recovery speed characteristics are acceptable. These parts offer significantly higher inventory availability (658,490 and 95,100 pieces respectively) compared to RSFGL RQG (659 pieces), supporting high-volume production requirements.

Q: Are there any thermal or temperature-related differences between substitute parts?

A: No. All substitute parts maintain the same operating temperature range of -55°C to 150°C junction temperature, ensuring thermal compatibility across all alternatives.

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