DF01ST-G Bridge Rectifier Diode: Equivalent & Substitute Parts

Part Overview

The DF01ST-G 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, making equivalent and substitute parts necessary for ongoing design support and production continuity. The DF01ST-G operates across a temperature range of -55°C to 150°C and is housed in a 4-SMD, Gull Wing surface mount package (DFS supplier device package). Identifying compatible alternatives ensures design flexibility while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	DF01ST-G Value
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Operating Temperature Range	-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

Substitute parts for the DF01ST-G are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Peak Reverse (Max): 100 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Operating Temperature Range: -55°C ~ 150°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, Gull Wing (exact match required)
Diode Type: Single Phase (exact match required)

Allowable Variations:

Voltage - Forward (Vf) (Max) @ If: 1.1 V maximum (equal or lower acceptable)
Current - Reverse Leakage @ Vr: 10 µA maximum at 100 V (equal or lower acceptable)
Supplier Device Package designation may differ (DFS, ABS, DBS, DB-S, DBLS)
Manufacturer may vary
Product status may differ (Active preferred over Obsolete)
RoHS and REACH compliance status may vary

All substitute parts listed maintain identical electrical performance within the specified operating envelope and are mechanically compatible with the original DF01ST-G footprint.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Status
DF01ST-G	Comchip Technology	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete
DF01S-HF	Comchip Technology	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS1-HF	Comchip Technology	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DB102S-HF	Comchip Technology	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DB102S	SMC Diode Solutions	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS102G	Taiwan Semiconductor Corporation	100 V	1 A	1.1 V @ 15 A	2 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS102GHRDG	Taiwan Semiconductor Corporation	100 V	1 A	1.1 V @ 1 A	2 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF01S-E3/77	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF01S1	Fairchild Semiconductor	100 V	1 A	1.1 V @ 1 A	3 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF01SA-E3/77	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	5 µA @ 100 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active

Engineering Selection Recommendations

All listed substitute parts meet the electrical and mechanical requirements for direct replacement of the DF01ST-G. Selection should prioritize active product status to ensure long-term availability and supply chain stability.

Primary Recommendation: DF01S-HF (Comchip Technology) is the manufacturer-recommended substitute, maintaining identical electrical specifications and active product status.

Alternative Selections by Manufacturer:

Vishay General Semiconductor: DF01S-E3/77 or DF01SA-E3/77 (both active, ROHS3 compliant, REACH unaffected)
SMC Diode Solutions: DB102S (active, ROHS3 compliant)
Taiwan Semiconductor Corporation: DBLS102G or DBLS102GHRDG (both active, ROHS3 compliant, REACH unaffected; DBLS102GHRDG includes AEC-Q101 automotive qualification)

All substitute parts are ROHS3 compliant and operate within the specified temperature range. Reverse leakage current specifications for substitute parts are equal to or lower than the original DF01ST-G, indicating equivalent or improved performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for DF01ST-G?

A: Yes. All listed substitute parts maintain identical peak reverse voltage (100 V), average rectified current (1 A), forward voltage (1.1 V maximum), operating temperature range (-55°C to 150°C), and 4-SMD Gull Wing package configuration. Reverse leakage current specifications are equal to or lower than the original part, ensuring compatibility.

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

A: Substitute parts differ by manufacturer and supplier device package designation (DFS, ABS, DBS, DB-S, DBLS). Electrical performance remains equivalent across all parts. Reverse leakage current varies slightly between manufacturers (2 µA to 10 µA at 100 V), with lower values indicating improved performance. All parts are functionally interchangeable within the specified electrical envelope.

Q: Why is DF01S-HF listed as the manufacturer-recommended substitute?

A: DF01S-HF is designated as the manufacturer-recommended substitute because it is produced by Comchip Technology, the original manufacturer of DF01ST-G, and maintains identical electrical specifications and active product status.

Q: Are there packaging differences I should consider?

A: All substitute parts use the same 4-SMD, Gull Wing surface mount package and are mechanically compatible with DF01ST-G PCB layouts. Packaging format (Tape & Reel, Cut Tape, Bulk) affects supply and handling but does not impact electrical or mechanical compatibility.

Q: Does DBLS102GHRDG offer any advantages over other substitutes?

A: DBLS102GHRDG includes AEC-Q101 automotive qualification and is graded for automotive applications. It also features the lowest reverse leakage current (2 µA at 100 V) among all listed substitutes. Select this part if automotive-grade reliability is required.

Q: What is the significance of lower reverse leakage current in substitute parts?

A: Lower reverse leakage current (measured in µA at 100 V) indicates reduced parasitic current flow in the reverse-biased state. Substitute parts with lower leakage values (2-5 µA) provide equivalent or improved performance compared to the original DF01ST-G (10 µA). This does not affect substitutability but may provide marginal benefits in low-power applications.

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