RU 2M Equivalent & Substitute Parts Reference

Part Overview

RU 2M is a through-hole, general-purpose axial diode manufactured by Sanken Electric USA Inc., with maximum 400 V reverse voltage and 1.1 A average rectified current, characterized by standard technology and fast recovery (400 ns trr). As this device is now obsolete, direct procurement may not be feasible, necessitating the identification of substitute models with equivalent electrical and mechanical characteristics to ensure compatibility and continued design or production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	RU 2M
Category	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1.1A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.1 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	400 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 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)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution is based solely on matching or exceeding critical electrical and mechanical parameters. For diodes and rectifiers, the substitution logic is governed by:

Maximum repetitive reverse voltage (Vr)
Average rectified current (Io)
Maximum forward voltage drop (Vf) at specified current
Recovery time (trr) category (fast or standard)
Maximum reverse leakage current at test voltage
Mounting type and package form factor
Operating temperature range
RoHS compliance and moisture sensitivity

Only components matching these parameters as provided are included as substitutes.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Reverse Leakage @ Vr	Mounting Type	Package / Case	Operating Temp (Junction)	RoHS	MSL	Status
RU 2M	Sanken Electric USA Inc.	400 V	1.1A	1.2 V @ 1.1 A	Fast Recovery =< 500ns, > 200mA (Io)	400 ns	10 µA @ 400 V	Through Hole	Axial	-40°C ~ 150°C	RoHS	1	Obsolete
1N5395-E3/73	Vishay	400 V	1.5A	1.4 V @ 1.5 A	Standard Recovery >500ns, > 200mA (Io)	2 µs	5 µA @ 400 V	Through Hole	DO-204AL (DO-41), Axial	-50°C ~ 150°C	ROHS3	1	Active
GP15G-E3/54	Vishay	400 V	1.5A	1.1 V @ 1.5 A	Standard Recovery >500ns, > 200mA (Io)	3.5 µs	5 µA @ 400 V	Through Hole	DO-204AC (DO-15), Axial	-65°C ~ 175°C	ROHS3	1	Active
PR1504-T	Diodes Inc.	400 V	1.5A	1.2 V @ 1.5 A	Fast Recovery =< 500ns, > 200mA (Io)	150 ns	5 µA @ 400 V	Through Hole	DO-204AC (DO-15), Axial	-65°C ~ 150°C	ROHS3	1	Active
RGP15G-E3/54	Vishay	400 V	1.5A	1.3 V @ 1.5 A	Fast Recovery =< 500ns, > 200mA (Io)	150 ns	5 µA @ 400 V	Through Hole	DO-204AC (DO-15), Axial	-65°C ~ 175°C	ROHS3	1	Active

Engineering Selection Recommendations

Select alternative parts with active status, RoHS compliance, and matching or better moisture sensitivity level (MSL 1). All listed substitutes have equivalent or superior environmental and compliance ratings compared to the original obsolete RU 2M device. Selection should be based strictly on provided data regarding electrical performance, mechanical compatibility, and compliance designations.

Frequently Asked Questions (FAQ)

Q: What are the main substitution criteria for the RU 2M diode?
A: Substitution requires the part to match or exceed voltage rating (400 V), rectified current (≥1.1 A), recovery speed category, reverse leakage characteristics, and package form factor.

Q: Do all substitute parts have the same package as RU 2M?
A: All substitutes are through-hole axial diodes. Specific case codes (DO-15, DO-41) are included in the parameter table to facilitate mechanical compatibility assessment.

Q: How is reverse recovery time (trr) handled in substitution?
A: Substitutes with similar or faster trr are included for compatible application scenarios, as this parameter affects switching speed and performance classification.

Q: Are all substitutes RoHS compliant?
A: Yes, all listed substitute diodes are RoHS (or ROHS3) compliant and MSL 1 rated, supporting unrestricted standard assembly environments.

Q: Are substitute diodes active or obsolete?
A: All listed substitutes are currently active according to the supplied data, ensuring continued sourcing availability.

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