RMB4SH Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The RMB4SH is a single-phase bridge rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications. This component operates at 400 V peak reverse voltage with 500 mA average rectified current capacity. The part maintains Active product status and carries automotive-grade qualification under AEC-Q101 standards.

Substitute parts become necessary when primary inventory is unavailable, when supply chain optimization is required, or when design flexibility permits selection from qualified alternatives that maintain identical electrical and mechanical specifications.

Substiute Parts

RMB4SH

Taiwan Semiconductor CorporationIn Stock: 897RMB4SH Datasheet

Current PartRFQ

MBS4H

Taiwan Semiconductor CorporationIn Stock: 3815MBS4H Datasheet

Parametric EquivalentRFQ

RMB4S

Taiwan Semiconductor CorporationIn Stock: 4440RMB4S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RMB4SH are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters:

Electrical Specifications:

• Voltage - Peak Reverse (Max): 400 V
• Current - Average Rectified (Io): 500 mA
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 400 mA
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V
• Operating Temperature Range: -55°C ~ 150°C (TJ)

Mechanical & Compliance Specifications:

• Mounting Type: Surface Mount
• Package / Case: 4-BESOP (0.173", 4.40mm Width)
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical values across these parameters, ensuring direct functional and physical interchangeability within the specified application envelope.

Parameter Comparison

Engineering Selection Recommendations

RMB4SH Primary Selection: The RMB4SH remains the primary part number for new designs and applications requiring full automotive qualification documentation. This part carries explicit AEC-Q101 qualification and maintains Active product status with established supply availability.

MBS4H Substitute: The MBS4H provides parametric equivalence with identical electrical performance and mechanical compatibility. This part carries AEC-Q101 qualification and maintains Active product status. Selection of MBS4H is appropriate when supply of RMB4SH is constrained and automotive qualification requirements are maintained.

RMB4S Substitute: The RMB4S provides parametric equivalence with identical electrical performance and mechanical compatibility. This part maintains Active product status. The RMB4S does not specify AEC-Q101 qualification in the provided data. Selection of RMB4S is appropriate for applications where automotive qualification documentation is not explicitly required, provided design specifications permit this substitution.

All three parts maintain ROHS3 compliance, identical operating temperature ranges, and equivalent moisture sensitivity ratings, supporting direct substitution within the specified electrical and thermal operating envelope.

Frequently Asked Questions (FAQ)

Q: Can MBS4H be used as a direct replacement for RMB4SH?

A: Yes. The MBS4H maintains identical electrical specifications (400 V peak reverse voltage, 500 mA average rectified current, 1 V forward voltage at 400 mA, 5 µA reverse leakage at 400 V), identical operating temperature range (-55°C to 150°C), identical package configuration (4-BESOP, 0.173" width, 4.40mm), and identical automotive qualification (AEC-Q101). Physical and functional interchangeability is confirmed.

Q: What is the difference between RMB4S and RMB4SH?

A: Based on provided specifications, both parts maintain identical electrical parameters, operating temperature ranges, packaging, and RoHS compliance. The primary distinction is that RMB4SH explicitly specifies AEC-Q101 qualification, while RMB4S does not include this qualification designation in the provided data.

Q: Are all three parts suitable for automotive applications?

A: RMB4SH and MBS4H both carry explicit AEC-Q101 automotive qualification. RMB4S is designated as automotive-grade but does not specify AEC-Q101 qualification in the provided data. Applications requiring formal AEC-Q101 documentation should specify either RMB4SH or MBS4H.

Q: Do these parts require different PCB footprints?

A: No. All three parts use the identical 4-BESOP package configuration with 0.173" width and 4.40mm dimensions. PCB footprints are interchangeable.

Q: What is the moisture sensitivity rating for these parts?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Are these parts RoHS compliant?

A: Yes. All three parts maintain ROHS3 compliance status.

Q: What is the operating temperature range for these bridge rectifiers?

A: All three parts operate across -55°C to 150°C junction temperature range, supporting extended automotive and industrial temperature environments.