SDB103-TP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The SDB103-TP is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 200 V peak reverse voltage and 1 A average rectified current in a 4-SMD, Gull Wing surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for legacy system maintenance, repair, and component sourcing when original inventory becomes unavailable.

Substiute Parts

SDB103-TP

Micro Commercial CoIn Stock: 1363SDB103-TP Datasheet

Current PartRFQ

DF02S

onsemiIn Stock: 52849DF02S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDB103-TP are qualified based on the following critical parameters:

• Voltage Rating: Peak reverse voltage must be 200 V or greater
• Current Rating: Average rectified current must meet or exceed 1 A
• Diode Type: Single-phase bridge rectifier topology
• Technology: Standard rectifier technology
• Mounting: Surface mount configuration
• Package: 4-SMD, Gull Wing or compatible footprint
• Environmental Compliance: ROHS3 compliance and MSL rating of 1 or better
• Operating Temperature: Range must encompass -55°C ~ 150°C

The DF02S from onsemi meets all substitution criteria. It maintains identical voltage and temperature specifications while providing higher current capacity (1.5 A vs. 1 A), ensuring backward compatibility with the SDB103-TP in legacy applications.

Parameter Comparison

Engineering Selection Recommendations

The DF02S qualifies as a direct substitute for the SDB103-TP based on electrical and mechanical compatibility. Both components maintain identical peak reverse voltage (200 V), forward voltage characteristics (1.1 V), reverse leakage current (10 µA @ 200 V), and operating temperature range (-55°C ~ 150°C). The DF02S provides increased current capacity (1.5 A vs. 1 A), which enhances design margin without introducing incompatibility.

Both parts carry ROHS3 compliance and MSL rating of 1, ensuring equivalent environmental and regulatory standing. The identical 4-SMD, Gull Wing package and surface mount configuration enable direct PCB footprint compatibility.

Selection between these parts should be based on component availability and supply chain considerations, as both are functionally equivalent for applications designed around the SDB103-TP specifications.

Frequently Asked Questions (FAQ)

Q: Can the DF02S replace the SDB103-TP in existing designs?

A: Yes. The DF02S maintains all critical electrical parameters (voltage, temperature range, leakage current) and package configuration. The higher current rating (1.5 A vs. 1 A) provides additional design margin without creating incompatibility.

Q: Are there package compatibility concerns?

A: No. Both components use identical 4-SMD, Gull Wing surface mount packages, ensuring direct PCB footprint compatibility without layout modifications.

Q: Do environmental and compliance ratings differ?

A: No. Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited), providing equivalent environmental and regulatory standing.

Q: What is the primary difference between these parts?

A: The DF02S is rated for 1.5 A average rectified current compared to the SDB103-TP's 1 A rating. All other electrical and mechanical specifications are identical.

Q: Why is the SDB103-TP marked "Not For New Designs"?

A: This designation indicates the component has reached end-of-life status. New designs should incorporate the DF02S or other current-generation bridge rectifiers. Existing systems using the SDB103-TP may continue operation with the DF02S as a substitute.