Equivalent & Substitute Parts for RFUS20TF6S

Part Overview

The RFUS20TF6S, manufactured by Rohm Semiconductor, is a general-purpose fast recovery diode in the Diodes, Rectifiers category. Rated for 600V reverse voltage and 20A average rectified current with a through-hole TO-220NFM (Full Pack) package, it exhibits a forward voltage of 2.8V at 20A and a reverse recovery time of 35ns. The component’s product status is Not For New Designs, requiring engineers to identify functionally equivalent or similar models to ensure long-term design support and supply chain continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	20A
Voltage - Forward (Vf) (Max) @ If	2.8 V @ 20 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 600 V
Mounting Type	Through Hole
Package / Case	TO-220-2 Full Pack
Supplier Device Package	TO-220NFM
Operating Temperature - Junction	150°C (Max)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Functional equivalence and substitution are determined by these key parameters: Voltage - DC Reverse (Vr) (Max), Current - Average Rectified (Io), Voltage - Forward (Vf) (Max) @ If, Speed (Reverse Recovery Time), Current - Reverse Leakage @ Vr, Mounting Type, Package/Case, Supplier Device Package, Operating Temperature - Junction, and RoHS Compliance. Substitute models listed match or are similar in these specified electrical and mechanical properties. Compatibility for substitution is strictly determined by matching these parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature - Junction	RoHS Status	MSL
RFUS20TF6S	Rohm Semiconductor	600 V	20A	2.8 V @ 20 A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	10 µA @ 600 V	Through Hole	TO-220-2 Full Pack	TO-220NFM	150°C (Max)	ROHS3 Compliant	1 (Unlimited)
RFUH20TF6SFHC9	Rohm Semiconductor	600 V	20A	2.8 V @ 20 A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	10 µA @ 600 V	Through Hole	TO-220-2 Full Pack	TO-220NFM	150°C (Max)	ROHS3 Compliant	1 (Unlimited)
BYC20X-600PQ	WeEn Semiconductors	600 V	20A	2.5 V @ 20 A	Fast Recovery =< 500ns, > 200mA (Io)	35 ns	10 µA @ 600 V	Through Hole	TO-220-2 Full Pack, Isolated Tab	TO-220FP	175°C (Max)	ROHS3 Compliant	1 (Unlimited)
BYC8X-600P,127	WeEn Semiconductors	600 V	8A	1.9 V @ 8 A	Fast Recovery =< 500ns, > 200mA (Io)	18 ns	20 µA @ 600 V	Through Hole	TO-220-2 Full Pack, Isolated Tab	TO-220FP	175°C (Max)	RoHS Compliant	1 (Unlimited)
QH03TZ600	Power Integrations	600 V	3A	3 V @ 3 A	Fast Recovery =< 500ns, > 200mA (Io)	9.8 ns	250 µA @ 600 V	Through Hole	TO-220-2	TO-220AC	150°C (Max)	RoHS Compliant	1 (Unlimited)
LXA06T600	Power Integrations	600 V	6A	2.94 V @ 6 A	Fast Recovery =< 500ns, > 200mA (Io)	23 ns	250 µA @ 600 V	Through Hole	TO-220-2	TO-220AC	150°C (Max)	RoHS Compliant	1 (Unlimited)
MURF1560G	onsemi	600 V	15A	1.5 V @ 15 A	Fast Recovery =< 500ns, > 200mA (Io)	60 ns	10 µA @ 600 V	Through Hole	TO-220-2 Full Pack	TO-220FP	-65°C ~ 175°C	ROHS3 Compliant	Not Applicable
UGF5JHC0G	Taiwan Semiconductor	600 V	5A	3 V @ 5 A	Fast Recovery =< 500ns, > 200mA (Io)	25 ns	30 µA @ 600 V	Through Hole	TO-220-2 Full Pack	ITO-220AC	-55°C ~ 150°C	ROHS3 Compliant	1 (Unlimited)
LQA03TC600	Power Integrations	600 V	3A	3.1 V @ 3 A	Fast Recovery =< 500ns, > 200mA (Io)	13 ns	20 µA @ 600 V	Through Hole	TO-220-2	TO-220AC	150°C (Max)	RoHS Compliant	1 (Unlimited)
VS-ETL1506FP-M3	Vishay General Semiconductor	600 V	15A	1.07 V @ 15 A	Fast Recovery =< 500ns, > 200mA (Io)	210 ns	15 µA @ 600 V	Through Hole	TO-220-2 Full Pack	TO-220-2 Full Pack	-65°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

Based on the product status of RFUS20TF6S as Not For New Designs, alternatives such as RFUH20TF6SFHC9 and BYC20X-600PQ align with the main part’s electrical and mechanical specifications while maintaining active product status. All parametric equivalents and similar models listed demonstrate RoHS compliance and have comparable or improved Moisture Sensitivity Level (MSL) ratings. Only models with matching compliance statuses and certifications should be considered for designs requiring validated environmental or regulatory qualification.

Frequently Asked Questions (FAQ)

Q1: What are the key criteria for substituting diodes in the same category as RFUS20TF6S?
A1: The main criteria include matching Voltage - DC Reverse (Vr) (Max), Current - Average Rectified (Io), Voltage - Forward (Vf) (Max) at the test current, reverse recovery time (trr), mounting type, package/case, and environmental compliance such as RoHS.

Q2: Is the package and mounting type important when substituting these diodes?
A2: Yes, substitute parts must use compatible through-hole mounting and a package or supplier device package suitable for the intended PCB and mechanical assembly, such as TO-220-2 Full Pack or TO-220NFM.

Q3: Can devices with lower current ratings (Io) be considered direct substitutes?
A3: Devices with lower average rectified current may not support equivalent load conditions; only substitute models meeting or exceeding the original device’s 20A Io rating provide direct electrical compatibility.

Q4: Do alternative parts provide the same reverse recovery speed and leakage performance?
A4: Listed alternatives match or closely approximate the specified fast recovery speed (reverse recovery time) and reverse leakage current to ensure consistent performance in fast-switching applications.

Q5: How is environmental and regulatory compliance ensured when selecting substitutes?
A5: Substitutes are selected based on provided RoHS status and moisture sensitivity level (MSL), ensuring compliance with environmental and manufacturing process requirements.

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