RS402L Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The RS402L is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 100 V peak reverse voltage and 4 A average rectified current in a through-hole RS-4L package. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while meeting equivalent packaging and compliance requirements.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, RS-4L
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RS402L is determined by the following critical parameters:

Diode Type & Technology: Single Phase, Standard technology
Current Rating: 4 A average rectified current (minimum requirement)
Voltage Rating: 100 V peak reverse voltage (minimum requirement)
Mounting Type: Through Hole configuration
Operating Temperature: -55°C ~ 150°C junction temperature range
Compliance: ROHS3 compliance and MSL Level 1

Substitute parts must meet or exceed the RS402L specifications in voltage and current ratings. Package compatibility is evaluated based on through-hole mounting capability and physical footprint equivalence. Product status and design lifecycle considerations inform selection priority for new applications versus legacy support.

Parameter Comparison

Parameter	RS402L (Main)	GBU401	RS402GL-BP
Manufacturer	Diodes Incorporated	Taiwan Semiconductor Corporation	Micro Commercial Co
Product Status	Obsolete	Active	Not For New Designs
Diode Type	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard
Voltage - Peak Reverse (Max)	100 V	50 V	100 V
Current - Average Rectified (Io)	4 A	4 A	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1.1 V @ 4 A	1.1 V @ 4 A
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, RS-4L	4-ESIP, GBU	4-SIP, RS-4L
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

RS402GL-BP (Micro Commercial Co) is the primary substitute for the RS402L. This part maintains identical voltage (100 V) and current (4 A) ratings, operates across the same temperature range, and uses the same RS-4L package footprint. The part is ROHS3 compliant with MSL Level 1 rating. Status designation as "Not For New Designs" indicates lifecycle maturity but does not preclude use in legacy system maintenance and repair applications.

GBU401 (Taiwan Semiconductor Corporation) is an alternative substitute with active product status, suitable for new design implementations. This part meets the 4 A current requirement and operating temperature specification. However, the 50 V peak reverse voltage rating is below the RS402L specification of 100 V, limiting its application to circuits where the actual reverse voltage stress does not exceed 50 V. Forward voltage characteristics are marginally higher (1.1 V vs. 1 V), with a different package form factor (4-ESIP, GBU vs. 4-SIP, RS-4L).

For legacy system support requiring direct footprint compatibility, RS402GL-BP is the appropriate selection. For new designs with voltage requirements at or below 50 V, GBU401 provides an active-status alternative with equivalent current handling and thermal performance.

Frequently Asked Questions (FAQ)

Q: Can GBU401 be used as a direct replacement for RS402L?

A: GBU401 is electrically compatible for current and temperature specifications but has a reduced peak reverse voltage rating of 50 V compared to the RS402L's 100 V specification. Substitution is valid only in applications where the actual reverse voltage does not exceed 50 V. Package form factors differ (4-ESIP vs. 4-SIP), requiring board layout evaluation.

Q: Is RS402GL-BP suitable for new product designs?

A: RS402GL-BP carries a "Not For New Designs" status designation. While electrically and mechanically equivalent to the RS402L, this status indicates the manufacturer recommends against incorporation into new designs. For new applications, GBU401 with active product status is preferred if voltage requirements permit.

Q: What are the key differences between RS402GL-BP and RS402L?

A: Both parts share identical voltage (100 V), current (4 A), temperature range (-55°C to 150°C), and package specifications (RS-4L). The primary difference is manufacturer (Micro Commercial Co vs. Diodes Incorporated) and product lifecycle status (Not For New Designs vs. Obsolete).

Q: Does forward voltage difference between substitutes affect circuit performance?

A: Forward voltage specifications are 1 V (RS402L) and 1.1 V (both substitutes) at their respective rated currents. This 0.1 V difference is within typical circuit tolerance margins for rectifier applications but should be evaluated in precision analog circuits or low-voltage power supplies where voltage drop directly impacts output regulation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RS402GL-BP and GBU401 are both ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the RS402L compliance profile.

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