DF04M Bridge Rectifier Single Phase 400V 1.5A Equivalent & Substitute Parts

Part Overview

The DF04M is a single-phase bridge rectifier diode manufactured by onsemi, rated for 400V peak reverse voltage and 1.5A average rectified current in a through-hole 4-DIP package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute parts must maintain compatibility across voltage rating, current capacity, forward voltage characteristics, and through-hole mounting configuration.

Key Parameters

Parameter	DF04M 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 A
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-EDIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DF04M is determined by the following criteria:

Primary Substitution Parameters:

Voltage - Peak Reverse (Max): Must equal or exceed 400V
Current - Average Rectified (Io): Must equal or exceed 1.5A
Diode Type: Must be Single Phase
Technology: Must be Standard
Mounting Type: Must be Through Hole
Voltage - Forward (Vf) (Max): Must not exceed 1.1V @ rated current
Operating Temperature Range: Must encompass or match -55°C ~ 150°C

Package Compatibility: Through-hole 4-EDIP packages with pin spacing of 0.300" (7.62mm) or 0.321" (8.15mm) are mechanically compatible with standard PCB layouts designed for the DF04M.

Compliance Considerations: RoHS3 compliance is required for new designs. REACH status affects supply chain and regulatory requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Vf (Max) @ If	Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status	RoHS Status
DF04M	onsemi	400 V	1.5 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Obsolete	ROHS3 Compliant
DB154	SMC Diode Solutions	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DB104-BP	Micro Commercial Co	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Not For New Designs	ROHS3 Compliant
DF06M	onsemi	600 V	1.5 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Obsolete	ROHS3 Compliant
DB105-BP	Micro Commercial Co	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DB106-BP	Micro Commercial Co	800 V	1 A	1.1 V @ 1 A	10 µA @ 800 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DB107-BP	Micro Commercial Co	1 kV	1 A	1.1 V @ 1 A	10 µA @ 1000 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DF005M	Fairchild Semiconductor	50 V	1 A	1.1 V @ 1 A	10 µA @ 50 V	-65°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Active	ROHS3 Compliant
DB101-BP	Micro Commercial Co	50 V	1 A	1.1 V @ 1 A	10 µA @ 50 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Not For New Designs	ROHS3 Compliant
DB102-BP	Micro Commercial Co	100 V	1 A	1.1 V @ 1 A	10 µA @ 100 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Not For New Designs	ROHS3 Compliant
DB103-BP	Micro Commercial Co	200 V	1 A	1.1 V @ 1 A	10 µA @ 200 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended for New Designs):

DB154 from SMC Diode Solutions is the primary equivalent. It matches the DF04M across all critical parameters: 400V peak reverse voltage, 1.5A average rectified current, 1.1V forward voltage, and -55°C to 150°C operating range. The part is Active status and ROHS3 compliant. Package dimensions differ slightly (0.321" vs 0.300" pin spacing), but both are standard through-hole 4-EDIP configurations compatible with typical PCB layouts.

Higher Voltage Alternatives:

DF06M (600V, 1.5A) and DB105-BP (600V, 1A) provide increased voltage margin. DF06M maintains the original 1.5A current rating and onsemi manufacturer continuity. DB105-BP is Active status from Micro Commercial Co with 1A current rating. Both operate within the same temperature range and are ROHS3 compliant. These are suitable when circuit design permits higher voltage ratings.

Lower Current Alternatives:

DB104-BP (400V, 1A) matches the voltage rating but reduces current capacity to 1A. This part is Not For New Designs status. DB103-BP (200V, 1A) and DB102-BP (100V, 1A) have insufficient voltage ratings for 400V applications and are Not For New Designs status.

Compliance Status:

All listed substitutes maintain ROHS3 compliance. DB154 is the only Active status part that directly matches DF04M electrical specifications. Parts marked Not For New Designs should be avoided for new circuit designs unless legacy compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can DB104-BP replace DF04M in all applications?

A: DB104-BP matches the 400V voltage rating and forward voltage characteristics but is rated for 1A average rectified current versus DF04M's 1.5A. Substitution is valid only if circuit current requirements do not exceed 1A. DB104-BP is also marked Not For New Designs, making it unsuitable for new product development.

Q: What is the difference between the 0.300" and 0.321" package pin spacing?

A: Both are standard through-hole 4-EDIP configurations. The 0.300" (7.62mm) spacing is used by onsemi parts (DF04M, DF06M, DF005M). The 0.321" (8.15mm) spacing is used by Micro Commercial Co and SMC Diode Solutions parts. PCB layouts designed for one spacing may require minor modifications to accommodate the other, but both are mechanically compatible with standard through-hole assembly processes.

Q: Is DB154 a direct replacement for DF04M?

A: DB154 is functionally equivalent across all electrical parameters: 400V peak reverse voltage, 1.5A average rectified current, 1.1V forward voltage, and -55°C to 150°C operating temperature. DB154 is Active status and ROHS3 compliant. The primary difference is package pin spacing (0.321" vs 0.300"), which requires PCB layout verification but does not affect electrical performance.

Q: Why are some parts listed as Not For New Designs?

A: Parts marked Not For New Designs indicate manufacturer end-of-life or obsolescence status. These parts may still be available from inventory but are not recommended for new circuit designs. Active status parts are preferred for new product development to ensure long-term supply availability and manufacturer support.

Q: Can higher voltage parts like DB105-BP or DB106-BP be used instead of DF04M?

A: Yes, higher voltage ratings are electrically compatible. DB105-BP (600V, 1A) and DB106-BP (800V, 1A) will function in DF04M applications, but current capacity is reduced to 1A. These parts are suitable only if circuit design permits the lower current rating. Higher voltage ratings provide additional safety margin but do not improve performance in 400V applications.

Q: What does ROHS3 compliance mean for this part?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitutes are ROHS3 compliant, ensuring regulatory compliance for applications subject to environmental and safety standards.

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