DF1502ST-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF1502ST-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 200 V peak reverse voltage and 1.5 A average rectified current. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within the allowed parameter tolerances for this diode category.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A
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 eligibility for the DF1502ST-G is determined by strict equivalence across the following critical parameters:

Diode Type: Single Phase
Technology: Standard
Voltage - Peak Reverse (Max): 200 V
Current - Average Rectified (Io): 1.5 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1.5 A
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)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in reverse leakage current, packaging format (Tube, Tape & Reel, Cut Tape), and product status are noted but do not disqualify substitution when the primary functional parameters align.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	RoHS Status
DF1502ST-G	Comchip Technology	Obsolete	200 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DF1502S-G	Comchip Technology	Active	200 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DB153S	SMC Diode Solutions	Active	200 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DBLS153G RDG	Taiwan Semiconductor Corporation	Active	200 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DBLS153GHRDG	Taiwan Semiconductor Corporation	Active	200 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DF02S	onsemi	Not For New Designs	200 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DF1502S-E3/77	Vishay General Semiconductor - Diodes Division	Active	200 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant
DFL1502S-E3/77	Vishay General Semiconductor - Diodes Division	Active	200 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 200 V	-55°C ~ 150°C (TJ)	4-SMD, Gull Wing	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: DF1502S-G

DF1502S-G is the manufacturer-recommended direct replacement for DF1502ST-G. Both parts are manufactured by Comchip Technology and share identical electrical specifications and packaging. DF1502S-G maintains active product status, ensuring long-term availability and supply chain continuity.

Secondary Recommendations: DF1502S-E3/77 and DFL1502S-E3/77

Both Vishay parts (DF1502S-E3/77 and DFL1502S-E3/77) are active products with equivalent electrical performance. These parts feature reduced reverse leakage current (5 µA @ 200 V compared to 10 µA @ 200 V in the original), which may provide improved performance in applications sensitive to leakage characteristics. Both are supplied in Tape & Reel packaging format.

Tertiary Recommendations: DBLS153G RDG and DBLS153GHRDG

Taiwan Semiconductor Corporation parts DBLS153G RDG and DBLS153GHRDG offer the lowest reverse leakage current (2 µA @ 200 V) among all equivalents. DBLS153GHRDG includes AEC-Q101 automotive qualification, suitable for automotive-grade applications. Both maintain active product status.

Alternative: DB153S

SMC Diode Solutions DB153S is an active equivalent with intermediate reverse leakage current (5 µA @ 200 V). This part is supplied in Tape & Reel packaging and maintains ROHS3 compliance.

Not Recommended for New Designs: DF02S

onsemi DF02S carries a "Not For New Designs" status despite meeting all electrical and mechanical specifications. This designation indicates the manufacturer does not recommend this part for new circuit designs. Existing inventory is substantial (52,800 Pcs), but alternative parts with active status are preferred.

Frequently Asked Questions (FAQ)

Q: Can DF1502S-G be used as a direct replacement for DF1502ST-G?

A: Yes. DF1502S-G is the manufacturer-recommended equivalent. Both parts share identical electrical specifications (200 V peak reverse voltage, 1.5 A average rectified current, 1.1 V forward voltage), operating temperature range (-55°C ~ 150°C), and 4-SMD Gull Wing package. The primary difference is product status: DF1502ST-G is obsolete while DF1502S-G is active.

Q: What is the significance of reverse leakage current differences among the substitute parts?

A: Reverse leakage current is the small current that flows through the diode when reverse-biased. The original DF1502ST-G and DF02S specify 10 µA @ 200 V, while DB153S and DF1502S-E3/77 specify 5 µA @ 200 V, and DBLS153G RDG and DBLS153GHRDG specify 2 µA @ 200 V. Lower leakage current may reduce power dissipation and heat generation in applications with extended reverse-bias periods. All values remain within acceptable limits for standard bridge rectifier applications.

Q: Are there packaging format differences among the substitute parts?

A: Yes. The original DF1502ST-G packaging format is not specified in the data. DF1502S-G is supplied in Tube format. DF1502S-E3/77 and DFL1502S-E3/77 are supplied in Tape & Reel (TR) format. DB153S is supplied in Tape & Reel (TR) format. DBLS153G RDG and DBLS153GHRDG packaging formats are not specified. Packaging format affects handling, storage, and automated assembly processes but does not impact electrical performance.

Q: Is DBLS153GHRDG suitable for automotive applications?

A: DBLS153GHRDG includes AEC-Q101 automotive qualification and maintains active product status. This part is suitable for automotive-grade applications requiring qualified components. Standard industrial applications do not require automotive qualification.

Q: Why is DF02S marked "Not For New Designs"?

A: The "Not For New Designs" status indicates the manufacturer (onsemi) does not recommend this part for new circuit designs, though it remains functionally equivalent. This designation typically reflects long-term product lifecycle management decisions. Alternative parts with active status are preferred for new designs.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All identified substitute parts are ROHS3 compliant, matching the original DF1502ST-G specification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage or handling.

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