DF1508S-G Bridge Rectifier Single Phase 800V 1.5A Equivalent & Substitute Parts

Part Overview

The DF1508S-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 800V peak reverse voltage and 1.5A average rectified current. This component is classified as Active product status and is RoHS3 compliant. Bridge rectifiers in this voltage and current class are widely used in power supply circuits, industrial equipment, and AC-to-DC conversion applications. Equivalent and substitute parts may be required due to component availability, packaging preferences, or supply chain considerations.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 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

Substitution for the DF1508S-G is determined by strict electrical and mechanical compatibility. All substitute parts must meet the following criteria:

Single-phase bridge rectifier topology
800V peak reverse voltage rating
1.5A average rectified current capability (or higher)
1.1V maximum forward voltage drop
10 µA maximum reverse leakage current at 800V
Surface mount 4-SMD, Gull Wing package
RoHS3 compliance
Operating temperature range of -55°C to 150°C minimum

Substitute parts are grouped by manufacturer and packaging format. Packaging variations (Tube, Cut Tape, Tape & Reel) do not affect electrical compatibility but may influence procurement and assembly workflows.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Status
DF1508S-G	Comchip Technology	800 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DF08S	onsemi	800 V	1.5 A	1.1 V @ 1 A	10 µA @ 800 V	-55°C ~ 150°C	4-SMD, Gull Wing	Not For New Designs
DF08S-T	Diodes Incorporated	800 V	1 A	1.1 V @ 1 A	10 µA @ 800 V	-65°C ~ 150°C	4-SMD, Gull Wing	Active
DF1508S	Diodes Incorporated	800 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 800 V	-65°C ~ 150°C	4-SMD, Gull Wing	Active
DF1508S-T	Diodes Incorporated	800 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 800 V	-65°C ~ 150°C	4-SMD, Gull Wing	Active

Engineering Selection Recommendations

DF1508S and DF1508S-T (Diodes Incorporated) are the primary electrical equivalents to DF1508S-G. Both parts maintain identical electrical specifications including 1.5A current rating, 800V voltage rating, and 1.1V forward voltage drop at 1.5A. Both are Active product status and RoHS3 compliant. The DF1508S-T variant offers an extended lower operating temperature limit of -65°C compared to the -55°C minimum of the main part, providing additional thermal margin in cold-environment applications.

DF08S (onsemi) is electrically compatible at 800V and 1.5A current rating but is classified as Not For New Designs. This part may be used for legacy system maintenance or repair applications where existing inventory exists.

DF08S-T (Diodes Incorporated) is rated for 1A average rectified current, which is below the 1.5A requirement of the main part. This part is suitable only for applications requiring 1A or less and should not be used as a direct substitute for 1.5A-rated designs.

Frequently Asked Questions (FAQ)

Q: Can DF08S-T replace DF1508S-G in all applications?

A: No. DF08S-T is rated for 1A average rectified current, while DF1508S-G is rated for 1.5A. DF08S-T is suitable only for circuits designed for 1A or lower current operation. Using DF08S-T in a 1.5A application will result in component overstress and potential failure.

Q: What is the difference between DF1508S and DF1508S-T?

A: Both parts are electrically identical with 1.5A current rating and 800V voltage rating. The primary difference is packaging format: DF1508S is supplied in Tube packaging, while DF1508S-T is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and procurement preferences.

Q: Why is DF08S marked as Not For New Designs?

A: DF08S (onsemi) carries a Not For New Designs status, indicating the manufacturer is phasing out this part number. While electrically compatible with DF1508S-G at 1.5A rating, new circuit designs should specify DF1508S or DF1508S-T to ensure long-term supply availability and manufacturer support.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), matching the environmental compliance profile of DF1508S-G.

Q: What is the operating temperature difference between DF1508S-G and DF1508S-T?

A: DF1508S-G operates from -55°C to 150°C, while DF1508S-T operates from -65°C to 150°C. DF1508S-T provides 10°C additional margin at the lower temperature limit, which may be beneficial in cold-environment or high-altitude applications.

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