DB103-BP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DB103-BP is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 200 V peak reverse voltage and 1 A average rectified current. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for maintenance, repair, and legacy system support where the original part is no longer readily available or when design flexibility permits component selection from active product lines.

Substiute Parts

DB103-BP

Micro Commercial CoIn Stock: 2047DB103-BP Datasheet

Current PartRFQ

DF005M

Fairchild SemiconductorIn Stock: 2728DF005M Datasheet

SimilarRFQ

DF02M

onsemiIn Stock: 2157DF02M Datasheet

SimilarRFQ

DF06M

onsemiIn Stock: 24393DF06M Datasheet

SimilarRFQ

DF202-G

Comchip TechnologyIn Stock: 809DF202-G Datasheet

SimilarRFQ

DB103

Rectron USAIn Stock: 1989DB103 Datasheet

Parametric EquivalentRFQ

DF02-G

Comchip TechnologyIn Stock: 906DF02-G Datasheet

Parametric EquivalentRFQ

DF03

SMC Diode SolutionsIn Stock: 3495DF03 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DB103-BP is determined by the following critical parameters:

• Voltage - Peak Reverse (Max): Must be ≥ 200 V to maintain circuit protection and reliability
• Current - Average Rectified (Io): Must be ≥ 1 A to handle the design current requirement
• Diode Type: Must be Single Phase bridge rectifier
• Mounting Type: Must be Through Hole for PCB compatibility
• Operating Temperature Range: Must encompass -55°C ~ 150°C or be compatible with the application environment
• Package Compatibility: Physical dimensions and pin configuration must support direct or adapter-based installation

Substitute parts are categorized as follows:

Direct Parametric Equivalents (identical or superior electrical specifications, same package family):

• DB103 (Rectron USA)
• DF02-G (Comchip Technology)
• DF03 (SMC Diode Solutions)

Functional Substitutes (meet or exceed voltage and current requirements, compatible package):

• DF202-G (Comchip Technology) — higher current rating (2 A)
• DF02M (onsemi) — higher current rating (1.5 A), same voltage

Lower Voltage Alternatives (reduced voltage rating, suitable only for applications with lower voltage requirements):

• DF005M (Fairchild Semiconductor) — 50 V rating only

Higher Voltage Alternatives (exceed voltage requirements, suitable for applications requiring higher voltage margin):

• DF06M (onsemi) — 600 V rating

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Replacements (Active product status, identical electrical specifications):

• DB103 (Rectron USA) — Parametric equivalent with Active product status. Identical voltage and current ratings, same package family (4-EDIP 0.321"), ROHS3 compliant. Superior reverse leakage performance (1 µA vs. 10 µA).

• DF02-G (Comchip Technology) — Parametric equivalent with Active product status. Identical voltage and current ratings, same package family (4-EDIP 0.321"), ROHS3 compliant. Suitable for direct substitution.

• DF03 (SMC Diode Solutions) — Parametric equivalent with Active product status. Identical voltage and current ratings, same package family (4-EDIP 0.321"), ROHS3 compliant. Lower reverse leakage (5 µA vs. 10 µA). Note: REACH Affected status requires compliance verification for regulated markets.

Higher Current Alternatives (suitable when design permits increased current margin):

• DF202-G (Comchip Technology) — 2 A rating provides 100% current margin over DB103-BP. Identical voltage rating (200 V), same package family (4-EDIP 0.321"), Active product status, ROHS3 compliant.

• DF02M (onsemi) — 1.5 A rating provides 50% current margin. Identical voltage rating (200 V), Obsolete product status. Package dimensions differ (0.300" vs. 0.321"), requiring physical layout verification.

Not Recommended for Direct Substitution:

• DF005M — 50 V rating is insufficient for 200 V circuit requirements.
• DF06M — Obsolete product status; 600 V rating exceeds application requirements.

Frequently Asked Questions (FAQ)

Q: Can DF005M replace DB103-BP?

A: No. DF005M is rated for 50 V peak reverse voltage, which is insufficient for circuits designed for 200 V operation. Using an undersized voltage rating creates risk of component failure and circuit damage.

Q: What is the difference between DB103 and DB103-BP?

A: DB103 is the base product number. DB103-BP is a specific variant designation. DB103 (Rectron USA) is an active parametric equivalent with identical electrical specifications and package family, making it suitable for replacement.

Q: Can I use DF202-G instead of DB103-BP?

A: Yes. DF202-G meets all substitution criteria: 200 V voltage rating, 2 A current rating (exceeds 1 A requirement), identical package family (4-EDIP 0.321"), Active product status, and ROHS3 compliance. The higher current rating provides additional design margin.

Q: Are there package compatibility issues with DF02M?

A: DF02M has a slightly smaller package footprint (0.300" vs. 0.321"). Physical PCB layout verification is required before substitution. Pin configuration remains compatible (4-DIP).

Q: Which substitute has the best product availability?

A: DB103 (Rectron USA), DF02-G (Comchip Technology), and DF03 (SMC Diode Solutions) all have Active product status with substantial inventory levels (813–3428 pcs), ensuring long-term availability for production and repair applications.

Q: Is DF03 suitable for REACH-regulated applications?

A: DF03 is marked as REACH Affected. Applications subject to REACH regulations require compliance verification with the manufacturer before design implementation.

Q: Can I use DF06M for higher voltage protection?

A: DF06M (600 V rating) exceeds the DB103-BP voltage requirement (200 V). While electrically compatible, it is Obsolete product status, making it unsuitable for new procurement. Use active alternatives (DB103, DF02-G, or DF03) instead.