RS405L Bridge Rectifier Single Phase 600V 4A Equivalent & Substitute Parts

Part Overview

The RS405L is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 600V 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 RS405L features a through-hole RS-4L package configuration and operates across a temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V
Operating Temperature	-55°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, RS-4L

Substitute Part Grouping Explanation

Substitute parts for the RS405L are qualified based on the following electrical and mechanical parameters:

Voltage - Peak Reverse (Max): 600 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
Current - Reverse Leakage @ Vr: Equal to or less than 10 µA @ 600 V
Operating Temperature: Must support minimum -55°C to 125°C range
Package / Case: 4-SIP configuration (physical compatibility)

The substitute parts listed below meet all mandatory electrical parameters and physical mounting requirements. Current ratings may exceed the original specification, which is acceptable for direct substitution in applications requiring 4A or less.

Parameter Comparison

Parameter	RS405L (Micro Commercial Co)	GBU406-G (Comchip)	GBU2506-G (Comchip)	GBU606-G (Comchip)	GBU806-G (Comchip)
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard	Standard
Voltage - Peak Reverse (Max)	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	4 A	4 A	4.2 A	6 A	8 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1 V @ 2 A	1 V @ 12.5 A	1 V @ 3 A	1 V @ 4 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, RS-4L	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All four substitute parts (GBU406-G, GBU2506-G, GBU606-G, GBU806-G) are manufactured by Comchip Technology and carry active product status, ensuring long-term availability and supply chain continuity. Each substitute meets or exceeds the electrical specifications of the RS405L.

GBU406-G provides a direct current rating match at 4A with identical forward voltage characteristics, making it the closest functional equivalent. GBU2506-G, GBU606-G, and GBU806-G offer higher current ratings (4.2A, 6A, and 8A respectively) while maintaining the same voltage and leakage specifications, suitable for applications with current headroom requirements.

All substitute parts are ROHS3 compliant, addressing environmental and regulatory requirements that the obsolete RS405L does not meet. Operating temperature ranges for all substitutes extend to 150°C, exceeding the RS405L specification of 125°C. Physical compatibility is maintained through 4-SIP through-hole package configuration across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can GBU406-G directly replace RS405L in existing designs?

A: Yes. GBU406-G matches the RS405L in current rating (4A), voltage specification (600V), forward voltage (1V @ rated current), and reverse leakage (10µA @ 600V). Both use 4-SIP through-hole packages. Physical pin compatibility and electrical performance are equivalent.

Q: Why are higher-rated parts (GBU606-G, GBU806-G) listed as substitutes?

A: Bridge rectifiers with higher current ratings are functionally compatible with lower-current applications. A 6A or 8A rated rectifier will operate correctly in a 4A circuit. The higher rating provides design margin and does not degrade performance in the original application.

Q: What is the difference between RS-4L and GBU package designations?

A: Both designations refer to 4-SIP through-hole package configurations. RS-4L is the Micro Commercial Co package identifier, while GBU is the Comchip Technology identifier. Physical dimensions and pin spacing are compatible for direct board-level substitution.

Q: Are there compliance differences between RS405L and the substitute parts?

A: Yes. RS405L is RoHS non-compliant, while all substitute parts (GBU406-G, GBU2506-G, GBU606-G, GBU806-G) are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute parts provide regulatory compliance.

Q: Do the substitute parts support the same temperature range as RS405L?

A: The substitute parts support -55°C to 150°C, which exceeds the RS405L range of -55°C to 125°C. Applications operating within the RS405L temperature window are fully supported by all substitutes.

Q: Which substitute part should be selected for new designs?

A: GBU406-G is recommended for direct replacement scenarios due to matched current rating. For new designs with potential future current requirements, GBU606-G or GBU806-G provide additional design margin. All three are active products with established supply chains.

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