Equivalent & Substitute Parts for DF02ST-G Bridge Rectifier

Part Overview

The DF02ST-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 200 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 150°C and is housed in a 4-SMD, Gull Wing surface mount package (DFS).

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	10 µA @ 200 V
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

Voltage - Peak Reverse (Max): 200 V
Current - Average Rectified (Io): 1 A
Operating Temperature: -55°C ~ 150°C (TJ)
Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing
Diode Type: Single Phase
Technology: Standard

Parts are grouped into two categories:

MFR Recommended Substitute: DF02S-HF (Comchip Technology) — Active product status with identical electrical specifications and package configuration.

Parametric Equivalents: ABS2-HF, DB103S-HF, ABS2U, DB103S, DBLS103G, DBLS103GHRDG, DF02S-E3/77, DF02S1, and DF02SA-E3/77 — All meet the core electrical and mechanical requirements. Variations in reverse leakage current and forward voltage are within acceptable tolerance ranges for standard bridge rectifier applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Status
DF02ST-G	Comchip Technology	200 V	1 A	1.1 V @ 1 A	10 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete
DF02S-HF	Comchip Technology	200 V	1 A	1.1 V @ 1 A	10 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS2-HF	Comchip Technology	200 V	1 A	1.1 V @ 1 A	5 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DB103S-HF	Comchip Technology	200 V	1 A	1.1 V @ 1 A	10 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS2U	SMC Diode Solutions	200 V	1 A	1.1 V @ 1 A	5 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DB103S	Rectron USA	200 V	1 A	1 V @ 1 A	1 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS103G	Taiwan Semiconductor Corporation	200 V	1 A	1.1 V @ 1 A	2 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS103GHRDG	Taiwan Semiconductor Corporation	200 V	1 A	1.1 V @ 1 A	2 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF02S-E3/77	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.1 V @ 1 A	5 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF02S1	Fairchild Semiconductor	200 V	1 A	1.1 V @ 1 A	3 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF02SA-E3/77	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.1 V @ 1 A	5 µA @ 200 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active

Engineering Selection Recommendations

Primary Recommendation: DF02S-HF (Comchip Technology) is the MFR recommended substitute with active product status and identical electrical and mechanical specifications to the obsolete DF02ST-G.

Secondary Recommendations: All parametric equivalents listed meet the core electrical requirements (200 V, 1 A, -55°C to 150°C) and share the same 4-SMD, Gull Wing package. Selection among these alternatives depends on:

Product availability and lead time
Compliance requirements (all listed parts are ROHS3 compliant)
Packaging format preference (Tape & Reel, Cut Tape, or Bulk)
Reverse leakage current tolerance (ranges from 1 µA to 10 µA @ 200 V)
Forward voltage tolerance (ranges from 1 V to 1.1 V @ 1 A)

Automotive Applications: DBLS103GHRDG is qualified to AEC-Q101 and carries automotive-grade designation for applications requiring automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can DF02S-HF directly replace DF02ST-G without PCB modifications?

A: Yes. DF02S-HF shares identical electrical specifications, operating temperature range, and 4-SMD, Gull Wing package footprint with DF02ST-G. No PCB layout changes are required.

Q: What is the difference between the various substitute part numbers?

A: All substitutes meet the core electrical requirements (200 V, 1 A, -55°C to 150°C). Differences exist in reverse leakage current (1 µA to 10 µA @ 200 V), forward voltage (1 V to 1.1 V @ 1 A), and manufacturer. These variations are within acceptable tolerance ranges for standard bridge rectifier applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. Compliance certifications are provided in the detailed specifications.

Q: Which substitute has the lowest reverse leakage current?

A: DB103S (Rectron USA) has the lowest reverse leakage current at 1 µA @ 200 V, followed by DBLS103G and DBLS103GHRDG at 2 µA @ 200 V.

Q: Can I use DBLS103GHRDG in non-automotive applications?

A: Yes. DBLS103GHRDG meets all electrical and mechanical requirements for standard applications. The automotive qualification (AEC-Q101) is an additional certification that does not restrict use in non-automotive designs.

Q: What packaging options are available for these substitutes?

A: Packaging formats include Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Bulk. Specific packaging availability varies by part number and manufacturer. Consult supplier documentation for current packaging options.

Q: Is forward voltage variation between substitutes significant?

A: Forward voltage ranges from 1 V to 1.1 V @ 1 A across all substitutes. This 0.1 V variation is typical for standard bridge rectifier designs and does not affect circuit functionality in most applications.

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