DF02S2 Bridge Rectifier - Equivalent & Substitute Parts

Part Overview

The DF02S2 is a single-phase bridge rectifier manufactured by onsemi, rated for 200 V peak reverse voltage and 2 A average rectified current. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. Bridge rectifiers in this voltage and current class are widely used in AC-to-DC conversion applications requiring compact surface-mount packaging.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max)	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	3 µA @ 200 V
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DF02S2 is determined by strict equivalence across the following critical parameters:

Voltage Rating: Peak reverse voltage must equal 200 V
Current Rating: Average rectified current must equal 2 A
Diode Configuration: Single-phase bridge rectifier topology
Technology: Standard rectifier technology
Mounting: Surface mount with 4-SMD, Gull Wing package compatibility
Environmental Compliance: ROHS3 compliance and MSL 1 rating

The DF202ST-G manufactured by Comchip Technology meets all substitution criteria within these parameters.

Parameter Comparison

Parameter	DF02S2 (onsemi)	DF202ST-G (Comchip Technology)
Diode Type	Single Phase	Single Phase
Technology	Standard	Standard
Voltage - Peak Reverse (Max)	200 V	200 V
Current - Average Rectified (Io)	2 A	2 A
Voltage - Forward (Vf) (Max)	1.1 V @ 1 A	1.1 V @ 2 A
Current - Reverse Leakage @ Vr	3 µA @ 200 V	10 µA @ 200 V
Operating Temperature Range	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The DF202ST-G is a direct parametric equivalent for the obsolete DF02S2. Both components maintain identical voltage and current ratings, operating temperature range, and compliance certifications. The DF202ST-G carries ROHS3 compliance and MSL 1 rating, matching the original part's environmental specifications. Current inventory availability of 707 units supports procurement continuity for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the DF202ST-G be used as a direct replacement for the DF02S2? A: Yes. Both parts share identical voltage (200 V), current (2 A), temperature range (-55°C to 150°C), and package specifications (4-SMD, Gull Wing). Compliance ratings are equivalent.

Q: What are the differences between these parts? A: The DF202ST-G exhibits slightly higher reverse leakage current (10 µA versus 3 µA at 200 V) and forward voltage is specified at 2 A rather than 1 A. These differences remain within standard rectifier performance tolerances for this voltage and current class.

Q: Are there package compatibility concerns? A: No. Both components use 4-SMD, Gull Wing surface-mount packaging, ensuring PCB footprint and reflow process compatibility.

Q: What compliance certifications apply to the substitute part? A: The DF202ST-G is ROHS3 compliant, REACH unaffected, and carries MSL 1 (unlimited moisture sensitivity level), matching the original DF02S2 specifications.

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