DF1504ST-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF1504ST-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 400 V peak reverse voltage and 1.5 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part is housed in a 4-SMD Gull Wing surface mount package (DFS) and operates across the temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	400 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 @ 400 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 of the DF1504ST-G is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Peak Reverse (Max): 400 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
Diode Type: Single Phase
Technology: Standard

Substitute parts are grouped into two categories: the manufacturer-recommended direct replacement (DF1504S-G) and parametric equivalents that meet all electrical specifications while potentially differing in product status, packaging format, or reverse leakage characteristics within acceptable limits.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status	RoHS Status	Inventory
DF1504ST-G	Comchip Technology	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete	ROHS3 Compliant	930 Pcs
DF1504S-G	Comchip Technology	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	978 Pcs
DB154S	SMC Diode Solutions	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	1600 Pcs
DBLS154G	Taiwan Semiconductor Corporation	400 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	1700 Pcs
DBLS154GH	Taiwan Semiconductor Corporation	400 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	3765 Pcs
DF04S	Vishay General Semiconductor - Diodes Division	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete	RoHS non-compliant	8254 Pcs
DF1504S-E3/77	Vishay General Semiconductor - Diodes Division	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	2315 Pcs
DFL1504S-E3/77	Vishay General Semiconductor - Diodes Division	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant	1005 Pcs
SDB154-TP	Micro Commercial Co	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Not For New Designs	ROHS3 Compliant	2975 Pcs

Engineering Selection Recommendations

Primary Recommendation: DF1504S-G

DF1504S-G is the manufacturer-recommended direct replacement for DF1504ST-G. Both are manufactured by Comchip Technology and share identical electrical specifications. DF1504S-G holds active product status, ensuring long-term availability and supply chain stability. This part is ROHS3 compliant and maintains the same operating temperature range and package configuration.

Secondary Recommendations: DBLS154G and DBLS154GH

DBLS154G and DBLS154GH, manufactured by Taiwan Semiconductor Corporation, are parametric equivalents meeting all electrical requirements. Both parts are active and ROHS3 compliant. DBLS154GH includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. The reverse leakage specification (2 µA @ 400 V) is superior to the original part, representing improved performance characteristics.

Alternative Recommendation: DF1504S-E3/77 and DFL1504S-E3/77

DF1504S-E3/77 and DFL1504S-E3/77, manufactured by Vishay General Semiconductor - Diodes Division, are parametric equivalents with active product status and ROHS3 compliance. These parts meet all electrical specifications and are available in Tape & Reel packaging. The reverse leakage specification (5 µA @ 400 V) remains within acceptable limits.

Not Recommended for New Designs: DF04S and SDB154-TP

DF04S is obsolete and RoHS non-compliant, with reduced current rating (1 A versus 1.5 A). SDB154-TP carries "Not For New Designs" status, limiting its suitability for ongoing applications despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can DF04S be used as a substitute for DF1504ST-G?

A: DF04S does not meet the current requirement. The DF04S is rated for 1 A average rectified current, while DF1504ST-G requires 1.5 A. Additionally, DF04S is obsolete and RoHS non-compliant. This part is not suitable for substitution.

Q: What is the difference between DBLS154G and DBLS154GH?

A: Both parts are electrically identical with 400 V peak reverse voltage and 1.5 A current rating. DBLS154GH includes AEC-Q101 automotive qualification and is recommended for automotive applications. Both are available in Tape & Reel packaging with superior reverse leakage characteristics (2 µA @ 400 V).

Q: Is DF1504S-G a direct replacement for DF1504ST-G?

A: Yes. DF1504S-G is the manufacturer-recommended replacement. Both parts are manufactured by Comchip Technology and share identical electrical and mechanical specifications. DF1504S-G holds active product status, ensuring continued availability.

Q: Can I use SDB154-TP in new designs?

A: SDB154-TP carries "Not For New Designs" status. While it meets the electrical specifications of DF1504ST-G, its lifecycle status restricts use in new applications. Active alternatives such as DF1504S-G, DBLS154G, or DF1504S-E3/77 are recommended instead.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (DF1504S-G), Tape & Reel (DB154S, DBLS154G, DBLS154GH, DF1504S-E3/77, DFL1504S-E3/77, SDB154-TP). All maintain the 4-SMD Gull Wing surface mount configuration required for PCB compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts are ROHS3 compliant except DF04S, which is RoHS non-compliant. For applications requiring RoHS compliance, select from DF1504S-G, DB154S, DBLS154G, DBLS154GH, DF1504S-E3/77, DFL1504S-E3/77, or SDB154-TP.

Q: What is the reverse leakage difference between substitute parts?

A: Reverse leakage specifications vary: DF1504ST-G and SDB154-TP specify 10 µA @ 400 V; DB154S and DF04S specify 5 µA @ 400 V; DBLS154G and DBLS154GH specify 2 µA @ 400 V. Lower reverse leakage indicates superior performance. All values remain within acceptable operating limits for standard bridge rectifier applications.

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