RSFJL RHG Equivalent & Substitute Parts

Part Overview

The RSFJL RHG is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 500 mA average rectified current in a Surface Mount Sub SMA package (DO-219AB). This component is classified as Active and suitable for new designs. The part features fast recovery characteristics with a reverse recovery time of 250 ns, making it applicable in switching power supply and rectification circuits requiring moderate current handling at high voltage levels.

Identification of equivalent and substitute parts is necessary to address component availability, supply chain continuity, and design flexibility across manufacturing batches and procurement cycles.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	V
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Mounting Type	Surface Mount	-
Package / Case	DO-219AB	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the RSFJL RHG is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Mounting Type: Surface Mount
Package / Case: DO-219AB
RoHS Status: ROHS3 Compliant

Current Handling Compatibility:

Current - Average Rectified (Io): Substitute parts must equal or exceed 500 mA

Electrical Performance Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed specified forward voltage at rated current
Reverse Recovery Time (trr): Fast recovery characteristic (≤ 500 ns, > 200 mA)
Current - Reverse Leakage @ Vr: Must not exceed 5 µA @ 600 V

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts with identical electrical specifications and the same base product number (RSFJL series), differing only in packaging format or product status.

Similar Parts: Parts from alternative manufacturers (Vishay General Semiconductor) with higher current ratings (1 A or 2 A) that maintain the same 600 V reverse voltage rating and DO-219AB package, offering enhanced performance margins while maintaining electrical compatibility.

Parameter Comparison

Parameter	RSFJL RHG	RSFJL	RSFJL R3G	VS-1EFU06HM3/I	VS-2EFU06HM3/I
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	500 mA	500 mA	500 mA	1 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	1.3 V @ 500 mA	1.3 V @ 500 mA	1.2 V @ 1 A	1.35 V @ 2 A
Reverse Recovery Time (trr)	250 ns	500 ns	250 ns	32 ns	55 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	3 µA @ 600 V	3 µA @ 600 V
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 175 °C	-55 to 175 °C
Product Status	Active	Not For New Designs	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection - RSFJL RHG: The RSFJL RHG is the recommended choice for new designs. It maintains Active product status, ensuring long-term availability and manufacturer support. The part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), suitable for standard manufacturing processes.

Parametric Equivalent - RSFJL: The RSFJL base part number is a parametric equivalent with identical electrical specifications. However, this part carries a "Not For New Designs" status and should be used only for legacy system maintenance or replacement applications where design continuity is required. The reverse recovery time specification differs at 500 ns compared to the 250 ns of the RSFJL RHG, indicating a slower recovery characteristic.

Parametric Equivalent - RSFJL R3G: The RSFJL R3G is discontinued at DiGi Electronics and should not be selected for new designs. This part maintains the same electrical specifications as the RSFJL RHG, including the 250 ns reverse recovery time, but availability is limited and declining.

Higher Current Alternatives - VS-1EFU06HM3/I and VS-2EFU06HM3/I: The Vishay FRED Pt® series diodes (VS-1EFU06HM3/I at 1 A and VS-2EFU06HM3/I at 2 A) are Active products from an alternative manufacturer. Both parts maintain the 600 V reverse voltage rating and DO-219AB package compatibility. These parts offer superior reverse recovery time performance (32 ns and 55 ns respectively) and lower reverse leakage current (3 µA). The Vishay parts include automotive-grade qualification (AEC-Q101) and extended operating temperature range (-55 to 175 °C). Selection of these higher-current alternatives is appropriate when design margins for current handling or thermal performance require enhancement, or when automotive-grade qualification is a system requirement.

Frequently Asked Questions (FAQ)

Q: Can RSFJL RHG be directly replaced with RSFJL?

A: Electrical substitution is possible as both parts share identical voltage and current ratings, forward voltage characteristics, and reverse leakage specifications. However, the RSFJL carries "Not For New Designs" status and exhibits a slower reverse recovery time (500 ns versus 250 ns). Use RSFJL only for legacy system maintenance where design continuity is mandatory.

Q: What is the difference between RSFJL RHG and RSFJL R3G?

A: Both parts are parametric equivalents with identical electrical specifications, including 600 V reverse voltage, 500 mA current rating, 1.3 V forward voltage, and 250 ns reverse recovery time. The primary difference is product status: RSFJL RHG is Active, while RSFJL R3G is discontinued. RSFJL RHG is the preferred selection for new designs.

Q: Can Vishay VS-1EFU06HM3/I or VS-2EFU06HM3/I replace RSFJL RHG?

A: Yes, both Vishay parts are electrically compatible substitutes. They maintain the same 600 V reverse voltage rating and DO-219AB package. The VS-1EFU06HM3/I (1 A) and VS-2EFU06HM3/I (2 A) offer higher current ratings than the 500 mA RSFJL RHG, providing additional design margin. Both Vishay parts are Active products with automotive-grade qualification (AEC-Q101) and superior reverse recovery time performance (32 ns and 55 ns respectively). Selection depends on whether the higher current capability and automotive qualification are required by the application.

Q: Are all substitute parts in the same package?

A: Yes, all listed substitute parts use the DO-219AB package (Sub SMA / SMF form factor) and are configured for Surface Mount assembly. No package conversion or PCB layout modification is required for substitution.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed are ROHS3 compliant and REACH unaffected. The Vishay alternatives (VS-1EFU06HM3/I and VS-2EFU06HM3/I) carry additional automotive-grade qualification per AEC-Q101. All parts have unlimited moisture sensitivity level (MSL 1).

Q: Which substitute part should be selected for new designs?

A: RSFJL RHG is the primary recommendation for new designs due to its Active product status and full manufacturer support. If automotive-grade qualification or enhanced reverse recovery performance is required, the Vishay VS-1EFU06HM3/I or VS-2EFU06HM3/I are appropriate alternatives, with selection between them based on required current margin (1 A or 2 A).

Q: What is the impact of reverse recovery time differences between substitute parts?

A: Reverse recovery time (trr) affects switching speed and switching losses in rectification circuits. The RSFJL RHG and RSFJL R3G specify 250 ns, while the RSFJL base part specifies 500 ns. The Vishay alternatives offer significantly faster recovery at 32 ns (VS-1EFU06HM3/I) and 55 ns (VS-2EFU06HM3/I). Faster recovery reduces switching losses and electromagnetic interference in high-frequency applications. Selection should align with circuit switching frequency and thermal management requirements.

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