RF501B2STL Equivalent & Substitute Parts Reference

Part Overview

RF501B2STL from Rohm Semiconductor is a general purpose fast recovery diode rated at 200 V and 5 A in a surface mount TO-252-3/DPAK package. The product is currently classified as obsolete, requiring designers and manufacturing engineers to identify alternative models for existing or new designs. Substitution is needed to ensure uninterrupted component sourcing and maintain compatibility within electrical and mechanical constraints defined for this category.

Key Parameters

Manufacturer Part Number	Manufacturer	Technology	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Reverse Recovery Time (trr)	Speed	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	Product Status	Qualification	Grade
RF501B2STL	Rohm Semiconductor	Standard	200 V	5A	920 mV @ 5 A	30 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	1 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	CPD	150°C (Max)	ROHS3 Compliant	1 (Unlimited)	Obsolete	-	-

Substitute Part Grouping Explanation

Substitute parts are identified strictly based on matching electrical and mechanical parameters. The key parameters considered are: voltage rating (Vr max), current rating (Io), diode technology, forward voltage (Vf) at rated current, reverse recovery time (trr) if provided, recovery speed, reverse leakage current, mounting type, package/case, operating junction temperature, RoHS compliance, and moisture sensitivity. Qualification and grade fields are considered for automotive and industrial requirements. Only parts matching these criteria are included.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Technology	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Reverse Recovery Time (trr)	Speed	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	Product Status	Qualification	Grade
RF501B2STL	Rohm Semiconductor	Standard	200 V	5A	920 mV @ 5 A	30 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	1 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	CPD	150°C (Max)	ROHS3 Compliant	1 (Unlimited)	Obsolete	-	-
RF501BM2STL	Rohm Semiconductor	Standard	200 V	5A	920 mV @ 5 A	25 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	1 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252	150°C (Max)	ROHS3 Compliant	1 (Unlimited)	Active	-	-
RF501BM2SFHTL	Rohm Semiconductor	Standard	200 V	5A	920 mV @ 5 A	25 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	1 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252	150°C (Max)	ROHS3 Compliant	1 (Unlimited)	Active	AEC-Q101	Automotive
CSHD8-200 TR13 PBFREE	Central Semiconductor Corp	Schottky	200 V	8A	900 mV @ 8 A	-	Fast Recovery ≤ 500ns, > 200mA (Io)	50 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	DPAK	-65°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	Active	-	-
STTH4R02BY-TR	STMicroelectronics	Standard	200 V	4A	1.05 V @ 4 A	30 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	3 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	DPAK	-40°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	Active	AEC-Q101	Automotive
VS-4EWH02FN-M3	Vishay General Semiconductor	Standard	200 V	4A	950 mV @ 4 A	20 ns	Fast Recovery ≤ 500ns, > 200mA (Io)	3 µA @ 200 V	Surface Mount	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252AA (DPAK)	-65°C ~ 175°C	ROHS3 Compliant	1 (Unlimited)	Active	-	-

Engineering Selection Recommendations

For the RF501B2STL diode, selection of substitutes must be based on matching voltage and current ratings, recovery speed, forward voltage, reverse leakage, package type (TO-252-3/DPAK), mounting type, and compliance certifications such as RoHS. All listed substitute parts are ROHS3 compliant and rated for surface mount DPAK packages, supporting direct mechanical interchangeability. Automotive-grade and AEC-Q101 qualified parts are indicated where applicable for designs requiring such certification.

Frequently Asked Questions (FAQ)

Q1: What are the main parameters to check when substituting surface mount diodes or rectifiers such as RF501B2STL?
A1: The primary parameters to compare are voltage reverse rating (Vr max), average rectified current (Io), forward voltage (Vf) at rated current, reverse recovery time (trr), recovery speed, reverse leakage current, and mechanical package compatibility.

Q2: Can I use a substitute with a higher current rating than the original?
A2: Yes, a diode with a higher current rating than the original 5A specification is acceptable if other key parameters (Vr, Vf, package) are matched.

Q3: Are substitute parts in different package variants suitable for direct replacement?
A3: Only substitute parts with the identical package type (TO-252-3, DPAK) and consistent footprint can be used for direct drop-in replacement.

Q4: Is RoHS or automotive qualification necessary for substitution?
A4: RoHS compliance is required for environmental regulations. Automotive qualification such as AEC-Q101 should be matched if the application demands it.

Q5: How does reverse recovery time influence substitute selection for fast recovery rectifiers?
A5: Reverse recovery time (trr) must be less than or equal to the maximum threshold specified (≤ 500 ns) to maintain fast recovery performance in the application.

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