RM 4Y Equivalent & Substitute Parts Reference

Part Overview

The RM 4Y (Sanken Electric USA Inc.) is classified as a Diode, Rectifier, specifically a general-purpose 100V 3A through-hole axial device. It features standard recovery and is supplied in bulk packaging. The product is currently listed as obsolete, making it necessary to identify compatible alternative or substitute models for ongoing maintenance, replacement, or new designs that require similar electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	RM 4Y
Category	Diodes, Rectifiers
Description	DIODE GEN PURP 100V 3A AXIAL
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	3A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature - Junction	-40°C ~ 150°C
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS	8541.10.0080

Substitute Part Grouping Explanation

Substitute and equivalent diodes for RM 4Y are determined by strict matching of key functional and mechanical parameters within the Diodes, Rectifiers category:

Maximum Reverse Voltage (Vr): Must be 100 V.
Average Rectified Current (Io): Must be 3A or very close.
Maximum Forward Voltage Drop (Vf) at Test Current: Comparable ratings.
Speed/Recovery Classification: Standard or Fast Recovery, as specified.
Reverse Leakage at Vr: Comparable or lower values.
Mounting Type and Package: Through-hole, axial form factor.
Operating Temperature Range: Encompass or exceed that of the original.
Compliance: RoHS status, MSL, ECCN/HTSUS as required for regulatory or procurement needs.

Only parts precisely matching or exceeding these criteria, as detailed in the provided input, are included.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Category	Description	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Current - Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	ECCN	HTSUS
RM 4Y	Sanken Electric USA Inc.	Diodes, Rectifiers	100V 3A AXIAL	100 V	3A	950 mV @ 3 A	Standard Recovery >500ns, > 200mA (Io)	10 µA @ 100 V	Through Hole	Axial	-40°C ~ 150°C	RoHS Compliant	1	EAR99	8541.10.0080
1N5186	Microchip Technology	Diodes, Rectifiers	100V 3A AXIAL	100 V	3A	1.5 V @ 9 A	Fast Recovery ≤500ns, >200mA (Io)	2 µA @ 100 V	Through Hole	B, Axial	-65°C ~ 175°C	RoHS non-compliant	1	EAR99	8541.10.0080
1N5401-G	Comchip Technology	Diodes, Rectifiers	100V 3A DO27	100 V	3A	950 mV @ 3 A	Standard Recovery >500ns, >200mA (Io)	5 µA @ 100 V	Through Hole	DO-201AD, Axial	-65°C ~ 125°C	ROHS3 Compliant	1	EAR99	8541.10.0080
1N5401G-T	Diodes Incorporated	Diodes, Rectifiers	100V 3A DO201AD	100 V	3A	1.1 V @ 3 A	Standard Recovery >500ns, >200mA (Io)	5 µA @ 100 V	Through Hole	DO-201AD, Axial	-65°C ~ 150°C	ROHS3 Compliant	1	EAR99	8541.10.0080
1N5416	Microchip Technology	Diodes, Rectifiers	100V 3A AXIAL	100 V	3A	1.5 V @ 9 A	Fast Recovery ≤500ns, >200mA (Io)	1 µA @ 100 V	Through Hole	B, Axial	-65°C ~ 175°C	RoHS non-compliant	1	EAR99	8541.10.0080
1N5804	Solid State Inc.	Diodes, Rectifiers	100V 2.5A DO204AP	100 V	2.5A	875 mV @ 1 A	Fast Recovery ≤500ns, >200mA (Io)	1 µA @ 100 V	Through Hole	DO-204AP, Axial	-65°C ~ 175°C	ROHS3 Compliant	Not Applicable	EAR99	8541.10.0080
GI501-E3/54	Vishay General Semiconductor	Diodes, Rectifiers	100V 3A DO201AD	100 V	3A	1.1 V @ 9.4 A	Standard Recovery >500ns, >200mA (Io)	5 µA @ 100 V	Through Hole	DO-201AD, Axial	-50°C ~ 150°C	ROHS3 Compliant	1	EAR99	8541.10.0080
RGP30B-E3/54	Vishay General Semiconductor	Diodes, Rectifiers	100V 3A DO201AD	100 V	3A	1.3 V @ 3 A	Fast Recovery ≤500ns, >200mA (Io)	5 µA @ 100 V	Through Hole	DO-201AD, Axial	-65°C ~ 175°C	ROHS3 Compliant	1	EAR99	8541.10.0080
UF5401-E3/54	Vishay General Semiconductor	Diodes, Rectifiers	100V 3A DO201AD	100 V	3A	1 V @ 3 A	Fast Recovery ≤500ns, >200mA (Io)	10 µA @ 100 V	Through Hole	DO-201AD, Axial	-55°C ~ 150°C	ROHS3 Compliant	1	EAR99	8541.10.0080

Engineering Selection Recommendations

Product status is a primary consideration due to the obsolete status of the RM 4Y. Substitute parts listed above are all currently active except where otherwise noted. For inventory, compliance, and regulatory needs, only select substitute parts that are RoHS compliant if required. All parts listed possess MSL 1 or equivalent, satisfying unlimited floor life requirements. ECCN and HTSUS codes match across all devices provided.

Frequently Asked Questions (FAQ)

Q1: What are the essential compatibility criteria for substituting RM 4Y?
A1: Substitutes must have a maximum reverse voltage of 100 V, average rectified current of 3A, comparable forward voltage drop, and through-hole axial package type. Speed (standard or fast recovery) and maximum reverse leakage must also align.

Q2: Are package and form factor important in selection?
A2: Yes. All substitutes must be in a through-hole, axial package form to ensure direct mechanical compatibility.

Q3: How should RoHS compliance impact substitute selection?
A3: If RoHS compliance is required for regulatory or environmental standards, only select parts with a listed RoHS compliant status.

Q4: Do all listed substitutes have the same speed class as RM 4Y?
A4: RM 4Y is specified as standard recovery. Some substitutes are standard recovery, others are fast recovery. Only select based on strict equivalency to application requirements as specified in the input.

Q5: What is the significance of MSL in substitute diode selection?
A5: MSL 1 (Unlimited) for all parts indicates no special moisture sensitivity controls are required, aligning with the original part’s handling standards.

Q6: Can lower current rated substitutes be used?
A6: Only substitutes with equivalent or higher current ratings (as specified) are listed. 1N5804 at 2.5A is only included due to explicit input; otherwise, maintain 3A as required.

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