DF1504S Bridge Rectifier Single Phase 400V 1.5A Equivalent & Substitute Parts

Part Overview

The DF1504S is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 400V peak reverse voltage and 1.5A average rectified current. This component is classified as Active status and is suitable for new designs. Bridge rectifiers of this specification are used in power supply circuits, battery chargers, and industrial control applications requiring AC-to-DC conversion with standard rectification technology.

Substitute parts become necessary when the primary part experiences supply constraints, obsolescence, or when design flexibility is required across multiple sourcing channels. The parts listed below maintain electrical and mechanical compatibility within the defined parameter tolerances for this product category.

Key Parameters

Parameter	Value	Unit
Diode Type	Single Phase	—
Voltage - Peak Reverse (Max)	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1.5	V @ A
Current - Reverse Leakage @ Vr	10 @ 400	µA @ V
Operating Temperature Range	-65 to 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 DF1504S is determined by strict equivalence across the following critical parameters:

Voltage - Peak Reverse (Max): Must equal 400V
Current - Average Rectified (Io): Must equal 1.5A
Diode Type: Must be Single Phase
Package / Case: Must be 4-SMD, Gull Wing
Mounting Type: Must be Surface Mount
Technology: Must be Standard

The substitute parts identified below meet all these criteria. Variations in operating temperature range, product status, or manufacturer do not affect electrical substitutability when the above parameters are matched.

Parameter Comparison

Parameter	DF1504S (Diodes Inc.)	DF1504ST-G (Comchip)	SDB104-TP (MCC)	SDB154-TP (MCC)
Manufacturer	Diodes Incorporated	Comchip Technology	Micro Commercial Co	Micro Commercial Co
Voltage - Peak Reverse (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A	1.1 V @ 1.5 A	1.1 V @ 1 A	1.1 V @ 1.5 A
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V
Operating Temperature Range	-65 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Obsolete	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	—	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

DF1504ST-G (Comchip Technology): This part provides full electrical equivalence to the DF1504S with identical current and voltage ratings. However, it carries Obsolete product status, which may limit long-term availability. It is suitable for replacement in existing designs where supply of the primary part is constrained, but not recommended for new production designs.

SDB154-TP (Micro Commercial Co): This part matches the DF1504S across all critical electrical parameters (400V, 1.5A) and maintains identical package and mounting specifications. It carries Not For New Designs status. It is electrically interchangeable and suitable for legacy system maintenance or when alternative sourcing is required.

SDB104-TP (Micro Commercial Co): This part differs in current rating (1A versus 1.5A) and is therefore not a direct substitute for applications requiring the full 1.5A capacity. It is listed as Not For New Designs. Use only in applications where the lower current rating is acceptable.

For new designs, the DF1504S (Active status) remains the primary selection. For existing production requiring alternatives, SDB154-TP provides full compatibility. DF1504ST-G and SDB104-TP should be evaluated only when supply constraints make them necessary.

Frequently Asked Questions (FAQ)

Q: Can SDB104-TP replace DF1504S in all applications?

A: No. SDB104-TP is rated for 1A average rectified current, while DF1504S is rated for 1.5A. SDB104-TP is suitable only for applications where the circuit current requirement does not exceed 1A. Exceeding this rating will result in component failure.

Q: What is the difference between DF1504ST-G and DF1504S?

A: Both parts are electrically identical with 400V peak reverse voltage and 1.5A current rating. The primary difference is product status: DF1504S is Active, while DF1504ST-G is Obsolete. DF1504ST-G may have limited availability and is not recommended for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—DF1504S, DF1504ST-G, SDB104-TP, and SDB154-TP—are ROHS3 Compliant and REACH Unaffected.

Q: Do the substitute parts have the same package and mounting type?

A: Yes. All substitute parts use 4-SMD, Gull Wing package with Surface Mount mounting type, ensuring PCB layout compatibility with the DF1504S.

Q: What is the operating temperature difference between DF1504S and its substitutes?

A: DF1504S operates from -65°C to 150°C, while DF1504ST-G, SDB104-TP, and SDB154-TP operate from -55°C to 150°C. The DF1504S provides a wider low-temperature range. For applications requiring operation below -55°C, only DF1504S is suitable.

Q: Can I use these parts interchangeably in production?

A: Electrical interchangeability is confirmed for parts with matching current ratings (DF1504S, DF1504ST-G, and SDB154-TP at 1.5A). However, product status should be considered: Active status parts are preferred for new designs, while Obsolete or Not For New Designs parts should be used only when necessary for supply continuity.

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