DF01ST-HF Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF01ST-HF is a single-phase bridge rectifier diode manufactured by Comchip Technology, rated for 100 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, indicating discontinuation from the manufacturer. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing

Substitute Part Grouping Explanation

Substitution of the DF01ST-HF is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Peak Reverse (Max): 100 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Operating Temperature Range: -55°C ~ 150°C (TJ)
Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing
Diode Type: Single Phase
Technology: Standard

Acceptable Variations:

Current - Reverse Leakage @ Vr: Variations permitted (10 µA, 5 µA, 3 µA, 2 µA all acceptable)
Supplier Device Package designation: May differ (DFS, ABS, DBS, DB-S, DBLS, 4-SDIP)
Packaging format: Tape & Reel, Cut Tape, Bulk, or standard packaging
Compliance certifications: RoHS3, REACH status, MSL ratings are supplementary attributes

All substitute parts listed maintain identical electrical performance within the specified operating parameters and are compatible with the original DF01ST-HF footprint and functional requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Inventory (Pcs)
DF01ST-HF	Comchip Technology	Obsolete	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	1063
DF01S-HF	Comchip Technology	Active	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	909
ABS1-HF	Comchip Technology	Active	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	1051
DB102S-HF	Comchip Technology	Active	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	700
DB102S	SMC Diode Solutions	Active	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	5300
DBLS102GHRDG	Taiwan Semiconductor Corporation	Active	100 V	1 A	1.1 V @ 1 A	2 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	960
DF01S-E3/77	Vishay General Semiconductor - Diodes Division	Active	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	10200
DF01S1	Fairchild Semiconductor	Active	100 V	1 A	1.1 V @ 1 A	3 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	2921
DF01SA-E3/77	Vishay General Semiconductor - Diodes Division	Active	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C (TJ)	Surface Mount	4-SMD, Gull Wing	3102

Engineering Selection Recommendations

Primary Recommendation: DF01S-HF

The DF01S-HF is the manufacturer-recommended direct replacement for the obsolete DF01ST-HF. Both parts are manufactured by Comchip Technology and maintain identical electrical specifications and package configuration. The DF01S-HF carries active product status, ensuring continued availability and supply chain support.

Secondary Recommendations (Parametric Equivalents):

DF01S-E3/77 (Vishay General Semiconductor - Diodes Division) offers the highest inventory availability (10,200 pcs) among all substitutes. This part maintains all critical electrical parameters and operates within the specified temperature range. RoHS3 compliance and REACH unaffected status provide regulatory alignment for commercial and industrial applications.

DB102S (SMC Diode Solutions) provides substantial inventory (5,300 pcs) with active product status. This part is supplied in Tape & Reel packaging format and carries RoHS3 compliance and REACH affected status. The lower reverse leakage current (5 µA) represents improved performance characteristics.

DBLS102GHRDG (Taiwan Semiconductor Corporation) is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. This part exhibits the lowest reverse leakage current (2 µA @ 100 V) and is suitable for applications requiring automotive qualification. RoHS3 compliance and REACH unaffected status are confirmed.

DF01SA-E3/77 (Vishay General Semiconductor - Diodes Division) is supplied in Tape & Reel packaging with 3,102 pcs inventory. This variant maintains all critical electrical parameters with RoHS3 compliance and REACH unaffected status.

Alternative Options:

ABS1-HF (Comchip Technology) and DB102S-HF (Comchip Technology) are additional active-status alternatives from established manufacturers with confirmed inventory availability.

DF01S1 (Fairchild Semiconductor) provides an alternative with 2,921 pcs inventory and exhibits 3 µA reverse leakage current.

All listed substitutes are electrically and mechanically compatible with the DF01ST-HF and support direct replacement in surface-mount applications requiring 100 V, 1 A single-phase bridge rectification.

Frequently Asked Questions (FAQ)

Q: Can the DF01S-HF directly replace the DF01ST-HF without circuit modification?

A: Yes. The DF01S-HF is the manufacturer-recommended replacement and maintains identical electrical specifications, forward voltage characteristics, operating temperature range, and 4-SMD Gull Wing package configuration. No circuit modifications are required.

Q: What is the significance of the different reverse leakage current values among substitute parts?

A: Reverse leakage current variations (ranging from 2 µA to 10 µA at 100 V) remain within acceptable operating parameters for standard bridge rectifier applications. Lower leakage current values indicate improved performance characteristics but do not affect functional compatibility. Selection may be based on application-specific requirements for leakage minimization.

Q: Are all substitute parts RoHS3 compliant?

A: Not all substitutes explicitly list RoHS3 compliance in the provided data. DF01S-E3/77, DB102S, DBLS102GHRDG, and DF01SA-E3/77 are confirmed RoHS3 compliant. DF01S-HF, ABS1-HF, DB102S-HF, and DF01S1 do not have RoHS3 status specified in the available parameters. Compliance verification with specific regulatory requirements should be confirmed with the component supplier for applications requiring RoHS3 certification.

Q: What packaging formats are available for these substitute parts?

A: Packaging formats vary across substitutes. DF01S-E3/77 is supplied in Cut Tape (CT) & Digi-Reel format. DB102S is supplied in Tape & Reel (TR). DF01SA-E3/77 is supplied in Tape & Reel (TR). DF01S1 is supplied in Bulk. DF01S-HF, ABS1-HF, DB102S-HF, and DBLS102GHRDG do not have specific packaging format designations provided. Packaging selection should align with production assembly requirements and inventory management practices.

Q: Is DBLS102GHRDG suitable for automotive applications?

A: Yes. DBLS102GHRDG carries automotive-grade designation and is qualified to AEC-Q101 standards. This part is appropriate for automotive and mission-critical applications requiring automotive-level qualification and reliability assurance.

Q: What is the difference between the DFS, ABS, DBS, and DBLS package designations?

A: These designations represent different supplier device package classifications from various manufacturers. All maintain the same 4-SMD Gull Wing physical configuration and electrical performance. The package designation reflects the manufacturer's internal classification system and does not affect functional compatibility or footprint compatibility in surface-mount applications.

Q: Which substitute offers the best inventory availability?

A: DF01S-E3/77 (Vishay General Semiconductor - Diodes Division) offers the highest inventory availability with 10,200 pcs in stock, followed by DB102S (SMC Diode Solutions) with 5,300 pcs.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All listed substitute parts maintain identical critical electrical parameters (100 V peak reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A, -55°C to 150°C operating temperature) and the same 4-SMD Gull Wing surface-mount package. Direct substitution is supported without design modification.

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