DF08ST-G Bridge Rectifier Single Phase 800V 1A Equivalent & Substitute Parts

Part Overview

The DF08ST-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 800V peak reverse voltage and 1A average rectified current in a 4-SMD surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. Substitute parts maintain the same electrical specifications and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	10 µA @ 800 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DF08ST-G are selected based on strict electrical and mechanical parameter matching. The following criteria determine substitutability:

Critical Parameters for Substitution:

Voltage - Peak Reverse (Max): 800 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

All substitute parts listed maintain these core electrical specifications and mechanical compatibility. Variations in reverse leakage current (ranging from 2 µA to 10 µA @ 800 V) remain within acceptable operational parameters for this product category. Substitute parts are classified as either MFR Recommended (active status, same manufacturer) or Parametric Equivalent (active status, alternative manufacturers or package variants).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Status
DF08ST-G	Comchip Technology	800 V	1 A	1.1 V @ 1 A	10 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete
DF08S-HF	Comchip Technology	800 V	1 A	1.1 V @ 1 A	10 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS8-HF	Comchip Technology	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS8U	SMC Diode Solutions	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
B108S_R2_00001	Panjit International Inc.	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DB106S	SMC Diode Solutions	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS106G	Taiwan Semiconductor Corporation	800 V	1 A	1.1 V @ 1 A	2 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS106GH	Taiwan Semiconductor Corporation	800 V	1 A	1.1 V @ 1 A	2 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF08S-E3/77	Vishay General Semiconductor - Diodes Division	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF08S-E3/I	Vishay General Semiconductor - Diodes Division	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF08S1	onsemi	800 V	1 A	1.1 V @ 1 A	3 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation: DF08S-HF

The DF08S-HF is the direct active equivalent from Comchip Technology, the original manufacturer of the DF08ST-G. This part maintains identical electrical specifications and package configuration while offering active product status and improved supply availability. Selection of DF08S-HF ensures design continuity with minimal qualification effort.

Alternative Selections by Application Requirements:

For applications requiring enhanced reliability and automotive qualification, DBLS106GH from Taiwan Semiconductor Corporation is available with AEC-Q101 qualification. This part maintains all electrical specifications while offering lower reverse leakage current (2 µA @ 800 V) and automotive-grade certification.

For general industrial applications with standard compliance requirements, DB106S from SMC Diode Solutions or ABS8U from SMC Diode Solutions provide active status with ROHS3 compliance and high inventory availability (33,300 and 1,054 units respectively).

DF08S1 from onsemi is classified as Not For New Designs and should not be selected for new product development, though it remains available for legacy system support.

All substitute parts maintain ROHS3 compliance and are suitable for surface mount assembly in 4-SMD, Gull Wing package configuration.

Frequently Asked Questions (FAQ)

Q: Can DF08S-HF be used as a direct replacement for DF08ST-G?

A: Yes. DF08S-HF maintains identical electrical specifications (800V, 1A, 1.1V forward voltage) and mechanical compatibility (4-SMD, Gull Wing package). The primary difference is product status: DF08ST-G is obsolete while DF08S-HF is active. No circuit modifications are required.

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

A: All substitute parts meet the core electrical requirements (800V peak reverse, 1A average rectified current, 1.1V forward voltage). Differences exist in reverse leakage current specifications (ranging from 2 µA to 10 µA @ 800 V), manufacturer, and product status. These variations remain within acceptable operational parameters for standard bridge rectifier applications.

Q: Are there package differences among the substitute parts?

A: All listed substitute parts use the 4-SMD, Gull Wing surface mount package. Packaging format variations (Cut Tape, Tape & Reel, or bulk) do not affect electrical or mechanical compatibility. Verify packaging format availability with your supplier based on production volume requirements.

Q: Which substitute part should be selected for automotive applications?

A: DBLS106GH is qualified to AEC-Q101 automotive standard and carries automotive-grade designation. This part is recommended for automotive applications requiring formal qualification documentation.

Q: Is reverse leakage current variation significant for substitution?

A: Reverse leakage current ranges from 2 µA to 10 µA @ 800 V across substitute parts. This variation is within acceptable limits for standard bridge rectifier applications. Selection based on leakage current should only be considered for specialized applications with specific leakage requirements; standard industrial and consumer applications are not affected by this variation.

Q: Can DF08S1 be used for new product designs?

A: No. DF08S1 is classified as Not For New Designs. This part should only be used for legacy system support or repair of existing products. New designs should select from parts with Active product status.

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