DF204ST-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF204ST-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 400 V peak reverse voltage and 2 A average rectified current. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The part is supplied in Tape & Reel packaging with a 4-SMD Gull Wing package configuration.

Substiute Parts

DF204ST-G

Comchip TechnologyIn Stock: 16120DF204ST-G Datasheet

Current PartRFQ

DF204S-G

Comchip TechnologyIn Stock: 11919DF204S-G Datasheet

MFR RecommendedRFQ

SDB204-TP

Micro Commercial CoIn Stock: 2181SDB204-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DF204ST-G are qualified based on the following electrical and mechanical parameters:

• Diode Type: Single Phase
• Voltage - Peak Reverse (Max): 400 V
• Current - Average Rectified (Io): 2 A
• Package / Case: 4-SMD, Gull Wing
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)

Parts meeting these core specifications are electrically and mechanically compatible. Variations in forward voltage (Vf) within the specified range and differences in packaging format (Tape & Reel versus Tube) do not affect functional substitution. Product status and compliance certifications are secondary considerations for component selection.

Parameter Comparison

Engineering Selection Recommendations

DF204S-G is the primary substitute for DF204ST-G. Both parts are manufactured by Comchip Technology with identical electrical specifications and package configuration. DF204S-G carries Active product status, ensuring long-term availability and supply chain continuity. The only difference is packaging format: DF204S-G is supplied in Tube format rather than Tape & Reel. Both parts maintain ROHS3 compliance and MSL 1 rating.

SDB204-TP is a secondary substitute manufactured by Micro Commercial Co. This part meets all core electrical and mechanical requirements with identical voltage, current, and temperature specifications. The forward voltage specification is 1.2 V @ 2 A compared to 1.1 V @ 2 A for the main part, remaining within acceptable operating parameters. SDB204-TP is classified as Not For New Designs, limiting its suitability for new production applications. This part is supplied in Tape & Reel format, matching the original packaging specification.

Frequently Asked Questions (FAQ)

Q: Can DF204S-G replace DF204ST-G directly in existing designs?

A: Yes. DF204S-G is electrically and mechanically equivalent to DF204ST-G. The difference in packaging format (Tube versus Tape & Reel) does not affect circuit performance. Component placement and soldering procedures remain unchanged.

Q: What is the significance of the forward voltage difference between DF204ST-G and SDB204-TP?

A: DF204ST-G specifies 1.1 V @ 2 A forward voltage, while SDB204-TP specifies 1.2 V @ 2 A. This 0.1 V difference is within normal manufacturing tolerance for bridge rectifiers and does not affect functional compatibility in standard rectification applications.

Q: Why is SDB204-TP marked as Not For New Designs?

A: SDB204-TP carries a Not For New Designs status, indicating the manufacturer does not recommend this part for new product development. This classification reflects long-term availability concerns or product lifecycle decisions by Micro Commercial Co. For new designs, DF204S-G is the recommended choice.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. DF204ST-G, DF204S-G, and SDB204-TP are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts meet the same environmental and regulatory standards.

Q: Does packaging format affect circuit performance?

A: No. Tape & Reel and Tube packaging formats contain identical components. The packaging difference affects only material handling, storage, and automated assembly processes. Electrical and thermal performance is unchanged.