RU 3AM Equivalent & Substitute Parts Reference

Part Overview

The Sanken Electric USA Inc. RU 3AM is a diode rectifier categorized under Diodes, Rectifiers, designed for general purpose use at 600 V and 1.5 A in an axial through-hole package. The RU 3AM is classified as a standard technology, fast recovery diode (reverse recovery time of 400 ns). The product status is obsolete; as a result, sourcing direct replacements is necessary for sustained manufacturing, maintenance, or design-in activities. Identifying alternative diode rectifiers with strictly compatible electrical and mechanical parameters is essential to maintaining continuity and performance.

Key Parameters

Parameter	Value
Manufacturer Part Number	RU 3AM
Manufacturer	Sanken Electric USA Inc.
Category	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1.5A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	400 ns
Current - Reverse Leakage @ Vr	10 µA @ 600 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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute diodes are selected based strictly on the following parameters: maximum DC reverse voltage, average rectified forward current, maximum forward voltage at rated current, reverse recovery time or speed designation, reverse leakage current at rated voltage, mounting type, and package/case. Only diodes in the Diodes, Rectifiers category matching these quantified criteria are considered eligible substitutes. The selected substitutes are current production, through-hole axial rectifiers compliant with RoHS requirements and similar in absolute rating and mechanical configuration.

Parameter Comparison

Parameter	RU 3AM	1N5397-E3/54	GP15J-E3/54	RGP15J-E3/54
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1.5A	1.5A	1.5A	1.5A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A	1.4 V @ 1.5 A	1.1 V @ 1.5 A	1.3 V @ 1.5 A
Speed	Fast Recovery =< 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	400 ns	2 µs	3.5 µs	250 ns
Current - Reverse Leakage @ Vr	10 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	DO-204AL, DO-41, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-40°C ~ 150°C	-50°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8541.10.0080	8541.10.0080	8541.10.0080	8541.10.0080
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

RU 3AM is obsolete and no longer in production. All substitute parts listed—1N5397-E3/54, GP15J-E3/54, RGP15J-E3/54—are classified as active. All substitute diode rectifiers are RoHS compliant, with moisture sensitivity level 1 (Unlimited), and carry the ECCN EAR99 and HTSUS 8541.10.0080 designations. These certifications support selection for applications requiring current compliance standards.

Frequently Asked Questions (FAQ)

Q1: What are the critical electrical parameters for substituting RU 3AM?
A1: The critical parameters are maximum DC reverse voltage, average rectified current, maximum forward voltage at rated current, reverse recovery time/speed classification, and reverse leakage current at rated reverse voltage.

Q2: Are all substitute diode rectifiers suitable for through-hole mounting?
A2: Yes. All substitute parts—1N5397-E3/54, GP15J-E3/54, RGP15J-E3/54—are specified for through-hole mounting in axial packages.

Q3: How do the substitute parts compare in temperature rating?
A3: Substitute junction temperature ranges are all equal or greater than the obsolete RU 3AM, staying within typical application requirements.

Q4: Do all listed substitutes comply with current RoHS directives?
A4: All substitute diodes are asserted as RoHS or ROHS3 compliant.

Q5: What is the significance of the moisture sensitivity level (MSL) for these diodes?
A5: All listed diodes, including RU 3AM and substitutes, have MSL 1 (Unlimited), allowing for unrestricted handling in manufacturing environments.

Q6: Are substitute diodes available in similar axial packages as RU 3AM?
A6: Yes. All substitutes are provided in axial DO-204AL (DO-41), DO-204AC (DO-15), compatible with the main part’s axial configuration.

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