1N5404 General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The 1N5404 is a general purpose rectifier diode rated for 400 V DC reverse voltage and 3 A average rectified current in a through-hole DO-201AD axial package. This component is classified as obsolete by the original manufacturer (SMC Diode Solutions), necessitating identification of equivalent and substitute parts for ongoing production and maintenance applications. Active alternatives from other manufacturers provide functional equivalence while maintaining electrical and mechanical compatibility with existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 3 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Capacitance @ Vr, F	30	pF @ 0V, 1MHz
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65 to 175	°C

Substitute Part Grouping Explanation

Substitution of the 1N5404 is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 3 A minimum
Mounting Type: Through Hole
Package / Case: DO-201AD or compatible axial package (DO-27, DO-201AA)

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current: Acceptable range 1.0 V to 1.3 V @ 3 A
Reverse leakage current: 5 µA to 10 µA @ 400 V
Recovery speed: Standard (>500ns) or Fast (≤500ns) recovery acceptable
Operating temperature range: Minimum -50°C to 150°C

Parts meeting all primary criteria and falling within secondary compatibility ranges are classified as direct substitutes. Parts exceeding current rating (4 A) or offering faster recovery characteristics remain functionally compatible for 3 A applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
1N5404	SMC Diode Solutions	400	3	1.2 @ 3A	Standard >500ns	5 @ 400V	DO-201AD	-65 to 175	Obsolete
1N5404G	onsemi	400	3	1.0 @ 3A	Standard >500ns	10 @ 400V	DO-201AA / DO-27	-65 to 150	Not For New Designs
1N5404-E3/73	Vishay General Semiconductor - Diodes Division	400	3	1.2 @ 3A	Standard >500ns	5 @ 400V	DO-201AD	-50 to 150	Active
FR304G A0G	Taiwan Semiconductor Corporation	400	3	1.3 @ 3A	Fast ≤500ns	5 @ 400V	DO-201AD	-55 to 150	Active
FR304G B0G	Taiwan Semiconductor Corporation	400	3	1.3 @ 3A	Fast ≤500ns	5 @ 400V	DO-201AD	-55 to 150	Active
MUR440 B0G	Taiwan Semiconductor Corporation	400	4	1.28 @ 4A	Fast ≤500ns	10 @ 400V	DO-201AD	-55 to 175	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended for Replacement):

The 1N5404-E3/73 from Vishay General Semiconductor - Diodes Division is the primary recommended substitute. This part maintains identical electrical specifications (400 V, 3 A, 1.2 V forward voltage, 5 µA reverse leakage) and package configuration (DO-201AD) as the original 1N5404. The part carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. Operating temperature range (-50°C to 150°C) is suitable for most industrial applications, with the upper limit matching the original specification.

Alternative Substitutes (Functionally Compatible):

The FR304G A0G and FR304G B0G from Taiwan Semiconductor Corporation provide functional equivalence with enhanced performance characteristics. Both parts maintain 400 V / 3 A ratings and DO-201AD packaging. Forward voltage is marginally higher (1.3 V vs. 1.2 V), and recovery speed is improved (Fast ≤500ns vs. Standard >500ns). These parts are Active status with ROHS3 compliance. Operating temperature range (-55°C to 150°C) is acceptable for standard applications.

The MUR440 B0G from Taiwan Semiconductor Corporation exceeds the original current specification (4 A vs. 3 A) while maintaining 400 V reverse voltage and DO-201AD packaging. This part is suitable for applications requiring additional current margin. Fast recovery characteristics (≤500ns, 50 ns trr) and extended upper temperature limit (175°C) provide enhanced performance. Reverse leakage is 10 µA, within acceptable tolerance.

The 1N5404G from onsemi meets electrical requirements (400 V, 3 A) but carries Not For New Designs status. This part is acceptable for maintenance and repair of existing equipment only. Package variants (DO-201AA, DO-27) are mechanically compatible with DO-201AD footprints in through-hole applications.

Compliance and Certification:

All recommended substitutes carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the original 1N5404. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1N5404-E3/73 be used as a direct replacement for the 1N5404?

A: Yes. The 1N5404-E3/73 is a direct equivalent with identical voltage (400 V), current (3 A), forward voltage (1.2 V @ 3 A), and package (DO-201AD) specifications. The part is Active status and ROHS3 compliant, ensuring availability and regulatory conformance.

Q: What is the difference between standard recovery and fast recovery diodes?

A: Recovery speed refers to the time required for a diode to transition from conducting to blocking state. Standard recovery diodes (>500ns) are suitable for general purpose rectification in power supplies and industrial circuits. Fast recovery diodes (≤500ns) reduce switching losses and are preferred in high-frequency applications. Both types are electrically compatible for 3 A / 400 V applications.

Q: Can the MUR440 B0G (4 A rated) be used in place of the 1N5404 (3 A rated)?

A: Yes. The MUR440 B0G exceeds the current specification and is functionally compatible. The higher current rating provides additional design margin without affecting circuit operation at 3 A. All other electrical parameters (400 V reverse voltage, DO-201AD package) are equivalent.

Q: Are DO-201AA and DO-27 packages compatible with DO-201AD footprints?

A: Yes. DO-201AA, DO-27, and DO-201AD are all axial through-hole packages with identical lead spacing and mechanical compatibility. These packages are interchangeable in through-hole PCB applications.

Q: What is the significance of the operating temperature range difference between 1N5404 (-65°C to 175°C) and 1N5404-E3/73 (-50°C to 150°C)?

A: The 1N5404-E3/73 has a narrower operating range. For applications requiring operation below -50°C or above 150°C, the original 1N5404 or MUR440 B0G (which extends to 175°C) should be specified. For standard industrial applications (-40°C to 85°C ambient), the 1N5404-E3/73 is fully adequate.

Q: Is RoHS compliance required for all substitute parts?

A: All recommended substitutes carry ROHS3 compliance. If RoHS compliance is not a requirement, the 1N5404G (onsemi) is also available, though it carries Not For New Designs status and should be used only for maintenance applications.

Q: What does "Not For New Designs" product status mean?

A: This designation indicates that the manufacturer is not recommending the part for new circuit designs. The part may have limited availability or planned discontinuation. The 1N5404G should be used only for repair and maintenance of existing equipment using this component.

Q: How do I determine which substitute is best for my application?

A: Selection depends on three factors: (1) Product Status—use Active parts (1N5404-E3/73, FR304G variants, MUR440 B0G) for new designs; (2) Operating Temperature—if operation below -50°C or above 150°C is required, use MUR440 B0G; (3) Recovery Speed—if fast switching is beneficial, FR304G or MUR440 variants offer improved performance. For standard applications, 1N5404-E3/73 is the recommended choice.

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