RS405L Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The RS405L is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 600 V peak reverse voltage and 4 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The RS405L features a through-hole RS-4L package configuration and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value
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 Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, RS-4L
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility for the RS405L is determined by the following core parameters: voltage rating (600 V peak reverse), current rating (4 A average rectified), diode type (single phase), technology (standard), mounting type (through hole), and package compatibility (4-SIP configuration). Substitute parts must maintain electrical equivalence within the specified operating conditions and support the same functional application without circuit redesign.

The identified substitute parts are grouped as follows:

Direct Electrical Equivalents: Parts maintaining identical or superior electrical ratings across all critical parameters while preserving through-hole mounting and 4-SIP package form factor.

Manufacturer-Recommended Equivalents: Parts designated by the original manufacturer or authorized suppliers as direct functional replacements with full compatibility.

Parameter Comparison

Parameter	RS405L (Diodes Inc.)	GBU406 (MDD)	KBL06-E4/51 (Vishay)	RS405GL-BP (Micro Commercial Co)
Voltage - Peak Reverse (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	4 A	166 mA	4 A	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1 V @ 2 A	1.1 V @ 4 A	1.1 V @ 3 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	10 µA @ 600 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, RS-4L	4-SIP, GBU	4-SIP, KBL	4-SIP, RS-4L
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

RS405GL-BP (Micro Commercial Co) is the primary substitute for the RS405L. This part maintains identical current rating (4 A), voltage rating (600 V), package configuration (4-SIP, RS-4L), and base product number (RS405). It is actively manufactured, ROHS3 compliant, and REACH unaffected. The operating temperature range is -55°C to 125°C, which covers the lower end of the original specification but may require thermal evaluation for applications requiring operation above 125°C.

KBL06-E4/51 (Vishay General Semiconductor - Diodes Division) is a secondary substitute meeting the 600 V and 4 A electrical requirements with active product status. This part uses the KBL package variant instead of RS-4L, requiring mechanical verification for board layout compatibility. The forward voltage specification (1.1 V @ 4 A) is slightly elevated compared to the original part. The operating temperature range is -50°C to 150°C, which covers the upper thermal specification of the original part.

GBU406 (MDD) does not meet the current rating requirement of the RS405L. The average rectified current is specified as 166 mA, significantly below the 4 A requirement. This part is not suitable for direct substitution in applications requiring 4 A operation.

Frequently Asked Questions (FAQ)

Q: Can GBU406 be used as a substitute for RS405L? A: No. The GBU406 is rated for 166 mA average rectified current, while the RS405L requires 4 A. Using an undersized component will result in thermal stress and potential failure.

Q: What is the difference between RS405GL-BP and KBL06-E4/51? A: Both parts meet the 600 V and 4 A electrical requirements. RS405GL-BP uses the RS-4L package matching the original part's form factor, while KBL06-E4/51 uses the KBL package variant. Mechanical compatibility with the PCB layout must be verified for the KBL variant. RS405GL-BP also maintains the -55°C lower temperature limit, while KBL06-E4/51 is rated to -50°C.

Q: Is RS405GL-BP a direct pin-for-pin replacement? A: Yes. RS405GL-BP uses the same RS-4L package and 4-SIP configuration as the RS405L, enabling direct board-level substitution without layout modification.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All identified substitute parts (RS405GL-BP, KBL06-E4/51, and GBU406) are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original RS405L.

Q: What is the maximum operating temperature for RS405GL-BP? A: RS405GL-BP is rated for -55°C to 125°C junction temperature, which is 25°C lower than the original RS405L specification of -55°C to 150°C. Applications requiring sustained operation above 125°C require thermal analysis or selection of KBL06-E4/51, which supports -50°C to 150°C.

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