RS403L Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The RS403L is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 200 V peak reverse voltage and 4 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The RS403L features a through-hole RS-4L package and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Current - Reverse Leakage @ Vr	10 µA @ 200 V
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, RS-4L
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the RS403L are evaluated based on the following critical parameters:

Diode Type & Technology: Single phase, standard technology
Voltage Rating: Peak reverse voltage of 200 V or higher
Current Rating: Average rectified current of 4 A or higher
Mounting Type: Through-hole configuration
Package Compatibility: RS-4L or equivalent 4-pin package footprint
Temperature Range: -55°C to 150°C or wider
Compliance: ROHS3 compliance required

Two substitute parts meet these criteria:

RS403GL-BP (Micro Commercial Co) maintains identical voltage and current ratings with the same RS-4L package, ensuring direct mechanical and electrical compatibility.

GBU402 (Taiwan Semiconductor Corporation) operates at a reduced peak reverse voltage of 100 V, suitable only for applications where the circuit voltage does not exceed 100 V. This part shares the 4 A current rating and through-hole mounting but uses a different GBU package footprint.

Parameter Comparison

Parameter	RS403L (Diodes Inc.)	RS403GL-BP (Micro Commercial Co)	GBU402 (Taiwan Semiconductor)
Diode Type	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard
Voltage - Peak Reverse (Max)	200 V	200 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
Current - Reverse Leakage @ Vr	10 µA @ 200 V	5 µA @ 200 V	5 µA @ 100 V
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-SIP, RS-4L	4-ESIP, GBU
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Not For New Designs	Active

Engineering Selection Recommendations

RS403GL-BP is the preferred substitute for direct replacement applications. This part maintains the 200 V peak reverse voltage rating and RS-4L package footprint, ensuring compatibility with existing PCB layouts and circuit designs. The part is ROHS3 compliant and carries a "Not For New Designs" status, indicating limited future availability but suitable for legacy system support and maintenance.

GBU402 is applicable only in circuits where the maximum voltage does not exceed 100 V. While this part is currently active in production and offers better long-term availability, the reduced voltage rating restricts its use to lower-voltage applications. The GBU package footprint differs from the RS-4L, requiring PCB layout modifications. This part is ROHS3 compliant and represents the most readily available option for new designs operating within its voltage specification.

Frequently Asked Questions (FAQ)

Q: Can GBU402 replace RS403L in all applications?

A: No. GBU402 has a maximum peak reverse voltage of 100 V, compared to RS403L's 200 V rating. Use GBU402 only in circuits where the applied voltage does not exceed 100 V. For 200 V applications, RS403GL-BP is required.

Q: Is RS403GL-BP a direct pin-for-pin replacement?

A: Yes. RS403GL-BP uses the same RS-4L package and 4-SIP footprint as RS403L, enabling direct PCB substitution without layout modifications.

Q: What is the difference in forward voltage between these parts?

A: RS403L specifies 1 V maximum forward voltage at 3 A, while both RS403GL-BP and GBU402 specify 1.1 V maximum at 4 A. This 0.1 V difference is within typical circuit tolerance margins but should be verified in power dissipation-critical applications.

Q: Are all three parts RoHS compliant?

A: Yes. RS403L, RS403GL-BP, and GBU402 are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.

Q: Which part should be selected for new designs?

A: GBU402 is the only part with active production status. For applications requiring 200 V ratings, RS403GL-BP remains available but is not recommended for new designs. Evaluate circuit voltage requirements to determine the appropriate selection.

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