RS401GL-BP Bridge Rectifier Single Phase 50V 4A Equivalent & Substitute Parts

Part Overview

The RS401GL-BP is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 50V peak reverse voltage and 4A average rectified current in a 4-SIP RS-4L through-hole package. This part carries a "Not For New Designs" status, indicating it is no longer recommended for new circuit development. Finding equivalent substitute parts is necessary to support legacy system maintenance, repair operations, and design transitions to active product lines.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the RS401GL-BP is determined by the following criteria:

Primary Matching Parameters:

Single Phase diode type
Standard technology classification
50V peak reverse voltage rating
Through-hole mounting configuration
ROHS3 compliance and REACH unaffected status
Operating temperature range -55°C to 150°C

Current Rating Consideration: The RS401GL-BP is rated for 4A average rectified current. Substitute parts with equal or higher current ratings (4A, 6A, 8A, 25A, 35A) are electrically compatible for this application, as they can safely handle the 4A load requirement.

Package Variants: While the RS401GL-BP uses the RS-4L package, functionally equivalent parts are available in alternative 4-SIP packages (GBU, KBL) that maintain the same through-hole pin configuration and electrical performance.

Parameter Comparison

Part Number	Manufacturer	Current Rating (Io)	Vf (Max) @ If	Reverse Leakage @ 50V	Package	Product Status	Inventory
RS401GL-BP	Micro Commercial Co	4 A	1.1 V @ 4 A	5 µA	RS-4L	Not For New Designs	719 Pcs
GBU4005-G	Comchip Technology	4 A	1 V @ 2 A	10 µA	GBU	Active	848 Pcs
GBU6005-G	Comchip Technology	6 A	1 V @ 3 A	10 µA	GBU	Active	1089 Pcs
GBU8005-G	Comchip Technology	8 A	1 V @ 4 A	5 µA	GBU	Active	930 Pcs
KBL4005-G	Comchip Technology	4 A	1.1 V @ 4 A	10 µA	KBL	Active	975 Pcs
KBU35005-G	Comchip Technology	35 A	1.1 V @ 17.5 A	10 µA	KBU	Obsolete	1065 Pcs
GBU25005-G	Comchip Technology	25 A	1 V @ 12.5 A	10 µA	GBU	Active	954 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Current Rating): GBU4005-G and KBL4005-G are functionally equivalent to RS401GL-BP at the 4A rating. Both are manufactured by Comchip Technology with Active product status, ensuring long-term availability and support. KBL4005-G matches the forward voltage specification (1.1V @ 4A) identically to the original part.

For Higher Current Capacity Applications: GBU6005-G, GBU8005-G, GBU25005-G, and KBU35005-G provide increased current handling capability while maintaining 50V peak reverse voltage and through-hole mounting. These parts are suitable when circuit redesign permits higher current ratings or when thermal margin is required.

Compliance and Availability: All substitute parts listed maintain ROHS3 compliance and REACH unaffected status. GBU4005-G, GBU6005-G, GBU8005-G, GBU25005-G, and KBL4005-G carry Active product status, ensuring continued manufacturing and supply chain support. KBU35005-G is marked Obsolete and should be avoided for new applications despite inventory availability.

Frequently Asked Questions (FAQ)

Q: Can GBU4005-G directly replace RS401GL-BP in existing circuits? A: Yes. GBU4005-G matches the 4A current rating, 50V voltage rating, and through-hole mounting configuration. The forward voltage is slightly lower (1V @ 2A vs. 1.1V @ 4A), which is acceptable for rectifier applications. Physical package differences (GBU vs. RS-4L) require PCB layout verification.

Q: What is the difference between GBU and KBL package variants? A: Both GBU and KBL are 4-SIP through-hole packages with identical electrical performance at equivalent current ratings. Package selection depends on PCB footprint design and mechanical clearance requirements. Verify pin spacing and lead diameter compatibility with existing board layouts.

Q: Why are higher-rated parts like GBU8005-G listed as substitutes for a 4A application? A: Higher current-rated bridge rectifiers are electrically compatible with lower-current applications. A 4A load on an 8A-rated rectifier operates well within safe margins and may provide improved thermal performance. However, PCB layout and thermal management design must accommodate the different package footprint.

Q: Is KBU35005-G suitable for new designs despite Obsolete status? A: No. Parts marked Obsolete should not be selected for new circuit development. Use Active-status alternatives such as GBU25005-G for equivalent 25A+ current capacity.

Q: What compliance certifications apply to all listed substitute parts? A: All parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial and commercial applications.

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