RS404L Bridge Rectifier Single Phase 400V 4A Equivalent & Substitute Parts

Part Overview

The RS404L is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 400V peak reverse voltage and 4A average rectified current. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The RS404L operates across a temperature range of -55°C to 125°C and is housed in a 4-SIP RS-4L through-hole package. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating modern component availability and compliance requirements.

Substiute Parts

RS404L

Micro Commercial CoIn Stock: 1022RS404L Datasheet

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GBU2504-G

Comchip TechnologyIn Stock: 942GBU2504-G Datasheet

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GBU404-G

Comchip TechnologyIn Stock: 990GBU404-G Datasheet

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GBU604-G

Comchip TechnologyIn Stock: 1040GBU604-G Datasheet

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GBU804-G

Comchip TechnologyIn Stock: 963GBU804-G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RS404L are selected based on strict electrical parameter matching within the allowed tolerance bands for bridge rectifier applications. The primary substitution criteria are:

Mandatory Matching Parameters:

• Voltage - Peak Reverse (Max): 400 V (exact match required)
• Diode Type: Single Phase (exact match required)
• Technology: Standard (exact match required)
• Mounting Type: Through Hole (exact match required)
• Current - Average Rectified (Io): Equal to or greater than 4 A
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than 1 V at rated current
• Current - Reverse Leakage @ Vr: Equal to or less than 10 µA @ 400 V

All substitute parts listed (GBU404-G, GBU604-G, GBU804-G, GBU2504-G) meet or exceed the RS404L electrical specifications. The GBU series from Comchip Technology maintains identical voltage ratings and reverse leakage characteristics while offering equal or superior current ratings and operating temperature ranges. Package compatibility is maintained through 4-SIP through-hole configuration across all substitutes.

Parameter Comparison

Engineering Selection Recommendations

GBU404-G provides direct electrical equivalence to the RS404L with identical 4A current rating and 400V voltage specification. This part is the closest functional match and is recommended for applications requiring exact current capacity replacement. GBU404-G is ROHS3 compliant and active in production, addressing the obsolescence status of the original part.

GBU604-G and GBU804-G offer increased current capacity (6A and 8A respectively) while maintaining all other electrical parameters within specification. These parts are suitable for applications where design margin or future current demand requires higher ratings. Both are ROHS3 compliant and actively manufactured.

GBU2504-G provides the highest current capacity at 25A and is applicable only in applications where the circuit design can accommodate significantly higher current handling without thermal or mechanical constraints. This part represents a design upgrade rather than a direct replacement.

All substitute parts exceed the operating temperature range of the original RS404L, providing improved thermal performance. All substitutes maintain ROHS3 compliance and REACH unaffected status, supporting modern procurement and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can GBU404-G be used as a direct replacement for RS404L? A: Yes. GBU404-G meets all electrical specifications of the RS404L with identical voltage and current ratings. Both use 4-SIP through-hole packages. The primary difference is manufacturer (Comchip Technology vs. Micro Commercial Co) and active production status.

Q: What is the difference between GBU404-G, GBU604-G, and GBU804-G? A: These parts differ only in average rectified current rating: 4A, 6A, and 8A respectively. All maintain identical 400V peak reverse voltage, forward voltage drop, reverse leakage, and operating temperature range. Selection depends on circuit current requirements.

Q: Why is GBU2504-G listed as a substitute if it has 25A rating? A: GBU2504-G meets all mandatory electrical parameters and maintains the same package type. However, its 25A rating significantly exceeds the RS404L specification. This part is suitable only for applications where higher current capacity is required or beneficial.

Q: Are the GBU series parts pin-compatible with RS404L? A: All substitute parts use 4-SIP through-hole package configuration. Physical pin compatibility depends on specific PCB layout and mounting hole spacing. Verify mechanical dimensions and lead spacing before board-level substitution.

Q: What is the impact of the extended operating temperature range in substitute parts? A: Substitute parts operate to 150°C junction temperature versus 125°C for the RS404L. This provides additional thermal margin and is beneficial in high-temperature environments. No negative impact occurs in applications operating within the original -55°C to 125°C range.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts (GBU404-G, GBU604-G, GBU804-G, GBU2504-G) are ROHS3 compliant. The original RS404L is RoHS non-compliant. Substitution addresses both obsolescence and environmental compliance requirements.