DF04SA-E3/45 Equivalent & Substitute Parts

Part Overview

The DF04SA-E3/45 is a single-phase bridge rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates at 400 V peak reverse voltage with 1 A average rectified current, designed for standard rectification applications. The part is currently active in production with 735 units in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are preferred, or when design flexibility requires component options that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	5 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

Substitute parts for the DF04SA-E3/45 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Peak Reverse (Max): 400 V
Current - Average Rectified (Io): 1 A
Diode Type: Single Phase
Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing

Grouping Logic:

Group 1 - Parametric Equivalents (Identical Electrical Specifications): Parts matching all critical parameters with forward voltage and reverse leakage within specified ranges. These include DF04S-E3/45 (Vishay), DB104S-G (Comchip), and DF04S-G (Comchip).

Group 2 - Manufacturer Recommended Alternatives: Parts with identical electrical performance but different product status or compliance certifications. DF04S (Vishay) and DF04S-T (Diodes Incorporated) fall into this category.

Group 3 - Higher Current Rated Parts: DF1504ST-G (Comchip) operates at 1.5 A average rectified current, exceeding the 1 A requirement while maintaining 400 V peak reverse voltage and surface mount compatibility. This part is suitable for applications requiring additional current margin.

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
DF04SA-E3/45	Vishay	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant
DF04S-E3/45	Vishay	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant
DF04S	Vishay	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
DF04S-T	Diodes Incorporated	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-65°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3 Compliant
DB104S-G	Comchip Technology	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete	ROHS3 Compliant
DF04S-G	Comchip Technology	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete	ROHS3 Compliant
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

Engineering Selection Recommendations

Primary Selection - Active Production Parts:

DF04S-E3/45 (Vishay) and DF04S-T (Diodes Incorporated) are the preferred substitutes. Both are active production parts with ROHS3 compliance. DF04S-E3/45 maintains identical electrical specifications to the DF04SA-E3/45. DF04S-T, manufactured by Diodes Incorporated, offers extended operating temperature range (-65°C to 150°C) and higher inventory availability (104,400 units), with slightly elevated reverse leakage (10 µA vs. 5 µA) that remains within acceptable engineering tolerances for standard rectification applications.

Secondary Selection - Parametric Equivalents:

DB104S-G and DF04S-G (both Comchip Technology) provide parametric equivalence with identical 400 V / 1 A specifications and ROHS3 compliance. These parts are obsolete but available in inventory (1,511 and 1,425 units respectively). Selection of these parts is appropriate when primary options are unavailable and design timelines permit use of obsolete inventory.

Higher Current Alternative:

DF1504ST-G (Comchip Technology) operates at 1.5 A average rectified current while maintaining 400 V peak reverse voltage and 4-SMD Gull Wing packaging. This part is suitable for applications requiring current margin above the 1 A specification. The part is obsolete but ROHS3 compliant with 930 units in stock.

Avoid:

DF04S (Vishay) is obsolete and RoHS non-compliant. Use only when regulatory requirements do not mandate RoHS compliance and when other options are exhausted.

Frequently Asked Questions (FAQ)

Q: Can DF04S-T (Diodes Incorporated) directly replace DF04SA-E3/45 (Vishay)?

A: Yes. Both parts meet the critical substitution parameters: 400 V peak reverse voltage, 1 A average rectified current, single-phase operation, and 4-SMD Gull Wing surface mount packaging. DF04S-T is active production with ROHS3 compliance. The reverse leakage specification of DF04S-T (10 µA @ 400 V) is higher than DF04SA-E3/45 (5 µA @ 400 V) but remains within standard engineering tolerances for bridge rectifier applications.

Q: What is the difference between DF04S-E3/45 and DF04SA-E3/45?

A: Both parts are manufactured by Vishay with identical electrical specifications (400 V, 1 A, 1.1 V forward voltage, 5 µA reverse leakage). The suffix designation indicates packaging or tape configuration. Both are active production parts with ROHS3 compliance and are directly interchangeable.

Q: Can DF1504ST-G (1.5 A) be used in place of DF04SA-E3/45 (1 A)?

A: Yes, from an electrical compatibility standpoint. DF1504ST-G maintains 400 V peak reverse voltage and 4-SMD Gull Wing packaging. The higher current rating (1.5 A vs. 1 A) provides additional margin and does not create incompatibility. However, DF1504ST-G is obsolete. Use this part only when primary 1 A options are unavailable and application requirements permit higher current-rated components.

Q: Are Comchip parts (DB104S-G, DF04S-G) suitable replacements?

A: Yes. Both Comchip parts meet electrical specifications (400 V, 1 A) and packaging requirements (4-SMD Gull Wing). Both are ROHS3 compliant. However, both are obsolete. Use these parts when primary active production options are unavailable and inventory is accessible.

Q: What is the impact of reverse leakage differences between substitute parts?

A: The DF04SA-E3/45 specifies 5 µA reverse leakage at 400 V. Substitute parts DF04S-T, DB104S-G, DF04S-G, and DF1504ST-G specify 10 µA. This difference is within standard engineering tolerance for bridge rectifier applications and does not affect functional compatibility in typical rectification circuits.

Q: Does operating temperature range affect substitution compatibility?

A: DF04S-T offers extended operating temperature range (-65°C to 150°C) compared to DF04SA-E3/45 (-55°C to 150°C). This extended range provides additional design margin and is fully compatible. All other substitute parts maintain the -55°C to 150°C range of the primary part.

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