DF02ST-HF Equivalent & Substitute Parts

Part Overview

The DF02ST-HF is a single-phase bridge rectifier diode manufactured by Comchip Technology, rated for 200 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, indicating discontinuation from the original manufacturer. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for applications utilizing this bridge rectifier specification.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
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 Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing

Substitute Part Grouping Explanation

Substitution eligibility for the DF02ST-HF is determined by matching the following critical parameters:

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

All substitute parts listed meet these electrical and mechanical specifications. Variations in forward voltage (Vf) and reverse leakage current within the specified ranges do not preclude substitution, as these parameters remain within acceptable operational limits for the application. Substitute parts are grouped by manufacturer and product status, with active components prioritized over obsolete alternatives.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status
DF02ST-HF	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

The DF02S-HF, manufactured by Comchip Technology, is the manufacturer-recommended substitute for the obsolete DF02ST-HF. This part maintains identical electrical specifications and package configuration while offering active product status and current availability. Selection of this part ensures design continuity with minimal qualification effort.

Secondary Recommendations: Active Alternatives

The following parts provide parametric equivalence with active product status:

DB103S-HF (Comchip Technology): Identical electrical and mechanical specifications to DF02ST-HF with active status.
DF02S-E3/77 (Vishay General Semiconductor - Diodes Division): Meets all critical parameters with high inventory availability (30,300 units) and RoHS3 compliance.
DF02SA-E3/77 (Vishay General Semiconductor - Diodes Division): Tape & Reel packaging option with identical specifications and RoHS3 compliance.
DF02S1 (Fairchild Semiconductor): Meets all critical parameters with substantial inventory (10,200 units).
ABS2-HF and ABS2U (Comchip Technology and SMC Diode Solutions): Parametric equivalents with improved reverse leakage characteristics (5 µA vs. 10 µA).
DBLS103G and DBLS103GHRDG (Taiwan Semiconductor Corporation): Parametric equivalents with superior reverse leakage performance (2 µA). The DBLS103GHRDG variant includes automotive-grade qualification (AEC-Q101).
DB103S (Rectron USA): Parametric equivalent with superior forward voltage (1 V vs. 1.1 V) and reverse leakage (1 µA vs. 10 µA) characteristics.

Selection among these alternatives should be based on supply chain availability, packaging requirements (bulk, tape & reel, or cut tape), compliance certifications (RoHS3, REACH), and application-specific performance requirements.

Frequently Asked Questions (FAQ)

Q: Can DF02S-HF directly replace DF02ST-HF without circuit modification?

A: Yes. The DF02S-HF maintains identical electrical specifications (200 V peak reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, 10 µA reverse leakage at 200 V) and package configuration (4-SMD, Gull Wing) as the DF02ST-HF. No circuit modification is required.

Q: What is the difference between the various substitute parts listed?

A: All substitute parts meet the critical electrical parameters (200 V, 1 A, -55°C to 150°C operating range) and package requirements. Differences exist in reverse leakage current specifications, forward voltage characteristics, manufacturer, packaging format (bulk, tape & reel, cut tape), and compliance certifications. These variations do not affect substitution eligibility but may influence selection based on application requirements and supply availability.

Q: Are there packaging differences among the substitute parts?

A: Yes. Most parts are available in 4-SMD, Gull Wing surface mount packages. Packaging formats vary by supplier: some are supplied in bulk, others in tape & reel (TR), and some in cut tape (CT) with Digi-Reel options. Verify packaging compatibility with your procurement and assembly processes before selection.

Q: Do all substitute parts have RoHS3 compliance?

A: Not all listed parts explicitly state RoHS3 compliance in the provided specifications. DF02S-E3/77, DF02SA-E3/77, ABS2-HF, ABS2U, DBLS103G, and DBLS103GHRDG are confirmed RoHS3 compliant. Verify compliance requirements for your application and confirm with the supplier if RoHS3 certification is mandatory.

Q: What is the significance of the DBLS103GHRDG automotive qualification?

A: The DBLS103GHRDG variant includes AEC-Q101 automotive-grade qualification, indicating suitability for automotive applications with enhanced reliability and testing requirements. This part is appropriate for applications requiring automotive-grade components; standard industrial applications do not require this qualification.

Q: How do reverse leakage current differences affect component selection?

A: Reverse leakage current specifications range from 1 µA to 10 µA across the substitute parts. The DF02ST-HF specifies 10 µA at 200 V. Substitute parts with lower reverse leakage (1 µA to 5 µA) offer improved performance characteristics but do not preclude substitution. Selection should be based on application requirements for leakage performance and supply availability.

Q: Can I use DB103S (Rectron USA) as a substitute?

A: Yes. The DB103S meets all critical electrical and mechanical parameters. It offers superior forward voltage (1 V vs. 1.1 V) and reverse leakage (1 µA vs. 10 µA) characteristics. Verify packaging format and compliance certifications align with your procurement requirements.

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