RSFJL RUG Equivalent & Substitute Parts

Part Overview

The RSFJL RUG is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600V DC reverse voltage and 500mA average rectified current in a Surface Mount Sub SMA package (DO-219AB). This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are necessary when the RSFJL RUG reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative electrical characteristics such as higher current ratings or improved reverse recovery performance.

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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Package / Case	DO-219AB	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the RSFJL RUG is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600V
Package / Case: Must be DO-219AB (Sub SMA)
Mounting Type: Must be Surface Mount
Current - Average Rectified (Io): Must support minimum 500mA operation
Speed Classification: Must maintain Fast Recovery characteristics (≤ 500ns, > 200mA)
RoHS Status: Must maintain ROHS3 compliance

Parametric Equivalent Parts share identical electrical ratings and package specifications with the RSFJL RUG. These parts are direct functional replacements with no derating required.

Similar Parts meet the primary substitution criteria but may feature enhanced electrical characteristics such as higher current ratings, improved reverse recovery time, or extended operating temperature ranges. These parts are suitable for applications where the RSFJL RUG specifications are met or exceeded.

Parameter Comparison

Parameter	RSFJL RUG	RSFJL	RSFJL R3G	VS-1EFU06HM3/I	VS-2EFU06HM3/I
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)	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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
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 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
Grade	-	-	-	Automotive	Automotive
Qualification	-	-	-	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

RSFJL (Parametric Equivalent): This part maintains identical electrical specifications to the RSFJL RUG with matching 600V reverse voltage, 500mA current rating, and 250ns reverse recovery time. However, product status is listed as "Not For New Designs," indicating this part should not be selected for new circuit designs. Existing inventory of 12,300 pieces is available for legacy system support or maintenance applications.

RSFJL R3G (Parametric Equivalent): This variant provides identical electrical performance to the RSFJL RUG with 600V reverse voltage, 500mA current rating, and 250ns reverse recovery time. Product status is "Discontinued at DiGi Electronics," indicating limited future availability. Current inventory of 1,068 pieces is available. This part is suitable for replacement applications where existing designs require the RSFJL RUG specifications.

VS-1EFU06HM3/I (Similar - Higher Current Rating): This Vishay FRED Pt® series diode maintains the 600V reverse voltage specification while providing double the current rating at 1A. Reverse recovery time is significantly improved at 32ns compared to 250ns for the RSFJL RUG. Operating temperature range extends to 175°C. This part carries Automotive grade qualification with AEC-Q101 certification. Product status is Active with 36,329 pieces in inventory. Selection is appropriate for applications requiring enhanced performance or automotive compliance.

VS-2EFU06HM3/I (Similar - Higher Current Rating): This Vishay FRED Pt® series diode maintains the 600V reverse voltage specification while providing 2A current rating. Reverse recovery time is 55ns. Operating temperature range extends to 175°C. This part carries Automotive grade qualification with AEC-Q101 certification. Product status is Active with 10,200 pieces in inventory. Selection is appropriate for applications requiring higher current capacity or automotive compliance.

Frequently Asked Questions (FAQ)

Q: Can the RSFJL RUG be directly replaced with the RSFJL part?

A: The RSFJL part is a parametric equivalent with identical electrical specifications (600V, 500mA, 1.3V forward voltage, 250ns recovery time) and the same DO-219AB package. However, the RSFJL is marked "Not For New Designs," indicating it should only be used for legacy system maintenance or replacement applications where existing designs specifically require this part number.

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

A: Both parts are parametric equivalents with identical electrical ratings (600V, 500mA, 1.3V forward voltage, 250ns recovery time) and DO-219AB packaging. The primary difference is product status: RSFJL RUG is Active, while RSFJL R3G is Discontinued at DiGi Electronics. The RSFJL RUG should be preferred for new designs due to its active status and higher inventory availability (710 pieces vs. 1,068 pieces).

Q: Can the VS-1EFU06HM3/I or VS-2EFU06HM3/I be used as direct replacements for the RSFJL RUG?

A: The Vishay parts meet the primary substitution criteria with 600V reverse voltage rating and DO-219AB packaging. However, they feature higher current ratings (1A and 2A respectively versus 500mA) and significantly improved reverse recovery times (32ns and 55ns versus 250ns). These parts are suitable for applications where the RSFJL RUG specifications are met or exceeded. The Vishay parts also provide extended operating temperature range (-55 to 175°C versus -55 to 150°C) and automotive qualification (AEC-Q101).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The RSFJL RUG, RSFJL, RSFJL R3G, VS-1EFU06HM3/I, and VS-2EFU06HM3/I are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: What is the significance of the reverse recovery time differences?

A: Reverse recovery time (trr) indicates how quickly the diode transitions from conducting to blocking state. The RSFJL RUG has a trr of 250ns, while the RSFJL part has 500ns. The Vishay parts have significantly faster recovery times (32ns for VS-1EFU06HM3/I and 55ns for VS-2EFU06HM3/I). Faster recovery times reduce switching losses and electromagnetic interference in high-frequency applications. Selection depends on circuit operating frequency and efficiency requirements.

Q: Can the RSFJL RUG be used in automotive applications?

A: The RSFJL RUG does not carry automotive grade designation or AEC-Q101 qualification. If automotive compliance is required, the VS-1EFU06HM3/I or VS-2EFU06HM3/I should be selected, as both carry Automotive grade and AEC-Q101 qualification.

Q: What is the difference between Sub SMA and DO-219AB package designations?

A: Sub SMA and DO-219AB refer to the same physical package. Sub SMA is the supplier device package designation used by Taiwan Semiconductor Corporation, while DO-219AB is the standardized case outline designation. Both terms describe the same surface mount package used across all listed parts.

Q: Which substitute part should be selected for a new design?

A: For new designs, the RSFJL RUG should be selected as the primary choice due to its Active product status. If higher current capacity, improved reverse recovery performance, or automotive compliance is required, the VS-1EFU06HM3/I (1A rating) or VS-2EFU06HM3/I (2A rating) should be selected. The RSFJL and RSFJL R3G should not be used for new designs due to their "Not For New Designs" and "Discontinued" status respectively.

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