1N4004 Equivalent & Substitute Parts

Part Overview

The 1N4004 is a general-purpose rectifier diode manufactured by onsemi, rated for 400 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 axial package. This part is classified as Obsolete, which necessitates identification of equivalent and substitute components for ongoing production and maintenance applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with differing recovery characteristics or package configurations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 175	°C
Capacitance @ Vr, F	15	pF @ 4V, 1MHz

Substitute Part Grouping Explanation

Substitution of the 1N4004 is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 400 V to ensure equivalent circuit protection and reliability.

Current Rating: Substitute parts rated at 1 A average rectified current are direct equivalents. Parts rated at 2 A provide higher current capacity and are suitable for applications where increased current handling is acceptable.

Recovery Characteristics: The 1N4004 features standard recovery (>500 ns). Substitute parts with fast recovery (≤500 ns) offer improved switching performance and reduced reverse recovery losses, suitable for higher-frequency applications.

Package Configuration: Through-hole axial packages (DO-41, DO-204AL) are mechanically and electrically interchangeable. Surface-mount packages (SMA, DO-214AC) require different PCB layout and assembly processes.

Mounting Type: Through-hole and surface-mount variants are not interchangeable without circuit board redesign.

Temperature Range: Operating temperature ranges vary among substitutes. The 1N4004 operates from -55°C to 175°C; substitutes with extended ranges (-65°C minimum) provide broader environmental compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	Package	Mounting Type	Tj Range [°C]	Product Status
1N4004	onsemi	400	1	1.1 @ 1 A	Standard >500ns	10 @ 400 V	DO-41	Through Hole	-55 to 175	Obsolete
1N4004G	Rectron USA	400	1	1.0 @ 1 A	Standard >500ns	0.2 @ 400 V	DO-41	Through Hole	-65 to 175	Active
1N4004RLG	onsemi	400	1	1.1 @ 1 A	Standard >500ns	10 @ 400 V	DO-41	Through Hole	-65 to 175	Not For New Designs
1N4936G	Taiwan Semiconductor Corporation	400	1	1.2 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-55 to 150	Active
1N4936RLG	onsemi	400	1	1.2 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-65 to 150	Not For New Designs
EGP10G	Fairchild Semiconductor	400	1	1.25 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-65 to 150	Active
MRA4004T3G	onsemi	400	1	1.1 @ 1 A	Standard >500ns	10 @ 400 V	SMA	Surface Mount	-55 to 175	Not For New Designs
MUR140RLG	onsemi	400	1	1.25 @ 1 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-65 to 175	Active
MUR240G	onsemi	400	2	1.3 @ 2 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-65 to 175	Obsolete
MUR240RLG	onsemi	400	2	1.3 @ 2 A	Fast ≤500ns	5 @ 400 V	DO-41	Through Hole	-65 to 175	Active
MURA140T3G	onsemi	400	2	1.1 @ 1 A	Fast ≤500ns	5 @ 400 V	SMA	Surface Mount	-65 to 175	Active

Engineering Selection Recommendations

Direct Equivalent (Active Status):

The 1N4004G manufactured by Rectron USA is the primary direct equivalent. It maintains identical voltage and current ratings, standard recovery characteristics, and through-hole DO-41 package configuration. The 1N4004G is in Active product status and features AEC-Q101 automotive qualification, making it suitable for new designs and production applications.

Alternative with Extended Temperature Range:

The 1N4004RLG from onsemi provides electrical equivalence with extended operating temperature range (-65°C to 175°C versus -55°C to 175°C). However, this part is classified as Not For New Designs, limiting its use to legacy system maintenance and repair.

Fast Recovery Alternatives (Through-Hole):

Parts 1N4936G, 1N4936RLG, EGP10G, and MUR140RLG offer fast recovery characteristics (≤500 ns) while maintaining 400 V and 1 A ratings. These are suitable for applications requiring reduced switching losses and improved high-frequency performance. The 1N4936G and EGP10G are in Active status. MUR140RLG is Active and rated to 175°C junction temperature.

Higher Current Capacity:

MUR240RLG provides 2 A current capacity at 400 V with fast recovery and is in Active status. This part is suitable for applications requiring increased current handling within the same voltage class.

Surface-Mount Alternatives:

MRA4004T3G and MURA140T3G provide surface-mount SMA package options for applications requiring automated assembly. These require PCB redesign and are not pin-compatible with through-hole variants.

Compliance Considerations:

All listed substitutes maintain RoHS3 compliance and REACH compliance status consistent with the original 1N4004 specification.

Frequently Asked Questions (FAQ)

Q: Can I use 1N4004G as a direct replacement for 1N4004?

A: Yes. The 1N4004G maintains identical voltage (400 V), current (1 A), forward voltage (1.0 V @ 1 A), and recovery characteristics (standard >500 ns). It is packaged in the same DO-41 through-hole configuration and is in Active product status, making it the recommended direct equivalent.

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

A: Standard recovery diodes (1N4004, 1N4004G) have reverse recovery times exceeding 500 ns, suitable for low-frequency rectification. Fast recovery diodes (1N4936G, EGP10G, MUR140RLG) have reverse recovery times of 50–300 ns, reducing switching losses in higher-frequency applications. Fast recovery variants are electrically compatible but exhibit lower reverse leakage current and improved switching performance.

Q: Can I substitute a 2 A diode for a 1 A diode?

A: Yes, within the same voltage rating. MUR240RLG (2 A, 400 V) can replace 1N4004 (1 A, 400 V) in applications where increased current capacity is acceptable. The diode will operate at lower stress levels, improving reliability. However, circuit design must accommodate the different forward voltage characteristics.

Q: Are through-hole and surface-mount packages interchangeable?

A: No. Through-hole packages (DO-41) and surface-mount packages (SMA) require different PCB layouts, assembly processes, and soldering methods. Substitution between these package types requires circuit board redesign.

Q: What is the significance of the operating temperature range?

A: The 1N4004 operates from -55°C to 175°C junction temperature. Substitutes with extended ranges (e.g., -65°C to 175°C) provide broader environmental compatibility for applications in extreme temperature conditions. Verify that the application environment falls within the selected part's rated range.

Q: Why is 1N4004RLG marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in mature or declining production phases. While electrically equivalent, they are not recommended for new product development. Use 1N4004G or other Active-status alternatives for new designs to ensure long-term supply availability.

Q: How do I select between multiple active substitutes?

A: Selection depends on application requirements: (1) For standard-speed rectification with legacy compatibility, use 1N4004G. (2) For improved switching performance, use fast recovery variants (1N4936G, EGP10G, MUR140RLG). (3) For higher current capacity, use MUR240RLG. (4) For surface-mount assembly, use MRA4004T3G or MURA140T3G. Verify that forward voltage, reverse leakage, and temperature range meet circuit specifications.

Q: What does RoHS3 compliance mean?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the component meets European environmental standards by restricting the use of hazardous materials such as lead, cadmium, and mercury. All listed substitutes maintain RoHS3 compliance consistent with the original 1N4004.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message