DB102ST-HF Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DB102ST-HF is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 100 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The DB102ST-HF features surface mount packaging in a 4-SMD Gull Wing configuration suitable for automated assembly processes.

Substiute Parts

DB102ST-HF

Comchip TechnologyIn Stock: 1020DB102ST-HF Datasheet

Current PartRFQ

DB102S-HF

Comchip TechnologyIn Stock: 799DB102S-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DB102ST-HF is determined by electrical and mechanical parameter equivalence across the following criteria:

Primary Substitution Criteria:

• Diode Type: Single Phase bridge rectifier configuration
• Voltage Rating: 100 V peak reverse voltage (Vrrm)
• Current Rating: 1 A average rectified current (Io)
• Forward Voltage: 1.1 V maximum at 1 A forward current
• Reverse Leakage: 10 µA maximum at 100 V reverse voltage
• Temperature Range: -55°C to 150°C operating capability
• Mounting: Surface mount technology with 4-SMD Gull Wing package

The primary manufacturer-recommended substitute is DB102S-HF from Comchip Technology, which maintains identical electrical specifications and package configuration while offering active product status. Additional cross-reference substitutes (DF01SA-E3/77, DF01S1, DF01S-E3/77) are listed as compatible alternatives meeting the same parameter requirements.

Parameter Comparison

Engineering Selection Recommendations

The DB102S-HF is the primary substitute for the obsolete DB102ST-HF. Both components are manufactured by Comchip Technology and maintain identical electrical specifications and package configuration. The DB102S-HF carries active product status, ensuring continued availability and manufacturing support. Both parts comply with identical export classifications (EAR99) and tariff codes (HTSUS 8541.10.0080), supporting seamless integration into existing supply chains.

For applications requiring the DB102ST-HF, direct replacement with DB102S-HF is supported by parameter equivalence across voltage rating, current capacity, forward voltage characteristics, reverse leakage performance, and operating temperature range. The 4-SMD Gull Wing package configuration remains consistent, permitting direct PCB layout compatibility without redesign.

Cross-reference alternatives DF01SA-E3/77, DF01S1, and DF01S-E3/77 are listed as compatible substitutes meeting the same electrical and mechanical requirements. Selection among these alternatives depends on supplier availability and procurement lead time requirements.

Frequently Asked Questions (FAQ)

Q: Can DB102S-HF directly replace DB102ST-HF in existing designs?

A: Yes. The DB102S-HF maintains identical electrical specifications (100 V peak reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, 10 µA reverse leakage at 100 V) and package configuration (4-SMD Gull Wing DBS). Direct PCB substitution is supported without circuit modification.

Q: What is the primary reason for substituting DB102ST-HF?

A: The DB102ST-HF is classified as obsolete. The DB102S-HF provides equivalent functionality with active product status, ensuring long-term availability and manufacturing continuity.

Q: Are the operating temperature ranges identical between DB102ST-HF and DB102S-HF?

A: Both components operate across -55°C to 150°C. The DB102S-HF specification designates this range as TJ (junction temperature), consistent with standard thermal characterization methodology.

Q: Do the substitute parts require PCB layout modifications?

A: No. The DB102S-HF and cross-reference alternatives maintain the 4-SMD Gull Wing package configuration, permitting direct footprint compatibility without PCB redesign.

Q: Are export compliance classifications identical for all substitute parts?

A: The DB102ST-HF and DB102S-HF share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, supporting consistent regulatory compliance across substitution.

Q: What electrical parameters determine substitution compatibility?

A: Substitution is determined by equivalence in peak reverse voltage (100 V), average rectified current (1 A), forward voltage (1.1 V @ 1 A), reverse leakage (10 µA @ 100 V), and operating temperature range (-55°C to 150°C).