DF04S-G Bridge Rectifier Single Phase 400V 1A Equivalent & Substitute Parts

Part Overview

The DF04S-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 400V peak reverse voltage and 1A average rectified current in a 4-SMD surface mount package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. Substitute parts maintain identical or superior electrical performance while offering active product status or improved availability.

Key Parameters

Parameter	Value
Diode Type	Single Phase Bridge Rectifier
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	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

Substitute parts are grouped by substitution category based on electrical parameter equivalence and product status. All substitute parts maintain the core electrical specifications: 400V peak reverse voltage, 1A average rectified current, 1.1V forward voltage at 1A, and -55°C to 150°C operating temperature range. Substitution eligibility is determined by matching these critical parameters and package configuration (4-SMD, Gull Wing surface mount).

The following categories define substitution relationships:

MFR Recommended Substitutes: Active-status parts from the original manufacturer offering direct functional replacement with improved availability.

Parametric Equivalents: Parts from alternative manufacturers meeting identical electrical specifications and package requirements.

Direct Equivalents: Cross-manufacturer parts with matching electrical performance and package configuration.

Upgrade Options: Active-status parts with enhanced specifications or extended temperature range.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Status	RoHS
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
DF04S-HF	Comchip Technology	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	Not specified
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
DB104S-HF	Comchip Technology	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	Not specified
DF04S	Vishay General Semiconductor	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete	Non-compliant
SDB104-TP	Micro Commercial Co	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Not For New Designs	ROHS3
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
DBLS104G C1G	Taiwan Semiconductor Corporation	400 V	1 A	1.1 V @ 1 A	2 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3
DBLS104GHC1G	Taiwan Semiconductor Corporation	400 V	1 A	1.1 V @ 1 A	2 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3
DF04S-E3/45	Vishay General Semiconductor	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - DF04S-HF (Comchip Technology): Active product status with identical electrical specifications and ROHS3 compliance path. Maintains original manufacturer continuity with improved supply availability.

Secondary Recommendation - DF04S-T (Diodes Incorporated): Active product with extended lower operating temperature limit (-65°C vs -55°C), ROHS3 compliant, and highest inventory availability (104,400 pcs). Suitable for applications requiring expanded temperature performance.

Parametric Equivalent - DBLS104G C1G or DBLS104GHC1G (Taiwan Semiconductor Corporation): Active products with superior reverse leakage characteristics (2 µA vs 10 µA @ 400V), ROHS3 compliant. DBLS104GHC1G includes automotive-grade qualification (AEC-Q101) for regulated applications.

Alternative - DF04S-E3/45 (Vishay General Semiconductor): Active product with ROHS3 compliance and established supply chain. Lower reverse leakage (5 µA) compared to original specification.

Legacy Alternatives - DB104S-HF (Comchip Technology): Active product with identical electrical performance. Suitable for designs already qualified to DB104 series package designation.

Parts with obsolete or "Not For New Designs" status (DF04S-G, DB104S-G, DF04S, SDB104-TP) should be replaced in new designs. Existing inventory may be used for legacy product support with documented traceability.

Frequently Asked Questions (FAQ)

Q: Can DF04S-HF directly replace DF04S-G in existing designs?

A: Yes. DF04S-HF maintains identical electrical specifications (400V, 1A, 1.1V forward voltage, 10µA reverse leakage) and package configuration (4-SMD, Gull Wing). The primary difference is active product status versus obsolete status.

Q: What is the difference between DF04S-T and DF04S-G?

A: DF04S-T offers extended lower operating temperature (-65°C vs -55°C minimum), ROHS3 compliance, and active product status. Electrical performance at rated conditions is identical. DF04S-T is manufactured by Diodes Incorporated rather than Comchip Technology.

Q: Are DBLS104G C1G and DBLS104GHC1G interchangeable?

A: Both parts are electrically equivalent with identical voltage, current, and temperature specifications. DBLS104GHC1G includes automotive-grade qualification (AEC-Q101) and is suitable for regulated automotive applications. Standard DBLS104G C1G is suitable for general industrial applications.

Q: Why do some substitute parts show lower reverse leakage current?

A: Lower reverse leakage (2-5 µA vs 10 µA @ 400V) represents improved device characteristics. This is a beneficial parameter variation that does not affect functional compatibility. Applications designed for 10 µA leakage will operate within specification with lower-leakage alternatives.

Q: What packaging differences exist among substitute parts?

A: All listed substitute parts use identical 4-SMD, Gull Wing surface mount package. Differences in supplier device package designation (DFS, DBS, DF-S, SDB-1, DBLS) reflect internal manufacturer classifications but do not affect PCB footprint or mounting compatibility.

Q: Is RoHS compliance required for all substitute selections?

A: ROHS3 compliance is specified for DF04S-G. Substitute parts DF04S-HF, DB104S-HF, DF04S-T, DBLS104G C1G, DBLS104GHC1G, and DF04S-E3/45 are ROHS3 compliant. DF04S (Vishay) is RoHS non-compliant and should not be selected for new designs requiring RoHS certification.

Q: Can DF04S from Vishay replace DF04S-G from Comchip?

A: Electrical specifications are equivalent (400V, 1A, 1.1V forward voltage). However, DF04S is RoHS non-compliant and obsolete. This part should only be used for legacy product support where RoHS compliance is not required.

Q: What is the inventory status for active substitute parts?

A: DF04S-T (Diodes Incorporated) has the highest availability at 104,400 pcs. DF04S-HF (Comchip) has 729 pcs. DBLS104G C1G and DBLS104GHC1G (Taiwan Semiconductor) each have approximately 1,050 pcs. DF04S-E3/45 (Vishay) has 5,400 pcs available.

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