1N4003 General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The 1N4003 is a general purpose rectifier diode rated for 200 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as Obsolete, indicating it is no longer in active production. Finding equivalent and substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements where the original 1N4003 is unavailable or where design updates require components with improved specifications or compliance status.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 200 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the 1N4003 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Must be Through Hole
Package / Case: Must support DO-41, DO-204AL, or Axial configurations

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 1.0 V to 1.3 V @ 1 A
Reverse Recovery Time (trr): Standard recovery (>500ns) or faster acceptable
Current - Reverse Leakage @ Vr: Acceptable range 1 µA to 10 µA @ rated voltage
Operating Temperature Range: Must support minimum -55°C junction temperature

Compliance Considerations:

RoHS Status: Parts with ROHS3 Compliant status are preferred for new designs
Product Status: Active or Last Time Buy parts are preferred over Obsolete or Not For New Designs

Parts that do not meet the electrical compatibility requirements are classified as similar parts suitable only for specific applications where voltage or current ratings differ intentionally.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Temp Range	RoHS Status	Product Status
1N4003	Micro Commercial Co	200 V	1 A	1.1 V @ 1 A	2 µs	5 µA @ 200 V	DO-41	-55°C ~ 150°C	RoHS non-compliant	Obsolete
1N4003-TP	Micro Commercial Co	200 V	1 A	1.1 V @ 1 A	2 µs	5 µA @ 200 V	DO-41	-55°C ~ 150°C	ROHS3 Compliant	Not For New Designs
1N4003-T	Diodes Incorporated	200 V	1 A	1.0 V @ 1 A	Not specified	5 µA @ 200 V	DO-41	-65°C ~ 150°C	ROHS3 Compliant	Last Time Buy
1N4003G	Taiwan Semiconductor Corporation	200 V	1 A	1.0 V @ 1 A	Not specified	5 µA @ 200 V	DO-41	-55°C ~ 150°C	ROHS3 Compliant	Active
1N4003G-T	Diodes Incorporated	200 V	1 A	1.0 V @ 1 A	2 µs	5 µA @ 200 V	DO-41	-65°C ~ 175°C	ROHS3 Compliant	Active
1N4003RLG	onsemi	200 V	1 A	1.1 V @ 1 A	Not specified	10 µA @ 200 V	Axial	-65°C ~ 175°C	ROHS3 Compliant	Not For New Designs
1N3611	Microchip Technology	200 V	1 A	1.1 V @ 1 A	Not specified	1 µA @ 200 V	Axial	-65°C ~ 175°C	RoHS non-compliant	Active
1N4935-E3/73	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.2 V @ 1 A	200 ns	5 µA @ 200 V	DO-41	-50°C ~ 150°C	RoHS non-compliant	Active
1N5614	Microchip Technology	200 V	1 A	1.3 V @ 3 A	2 µs	500 nA @ 200 V	Axial	-65°C ~ 200°C	RoHS non-compliant	Active
1N5615GP-E3/73	Vishay General Semiconductor - Diodes Division	200 V	1 A	1.2 V @ 1 A	150 ns	500 nA @ 200 V	DO-15	-65°C ~ 175°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (200 V, 1 A, DO-41 Package):

The following parts provide direct electrical equivalence to the 1N4003 with identical voltage and current ratings in the same package form factor:

1N4003G-T (Diodes Incorporated) is the recommended primary substitute. This part is Active status, ROHS3 Compliant, and provides identical electrical specifications with forward voltage of 1.0 V @ 1 A and extended operating temperature range to -65°C ~ 175°C. The part is available in Cut Tape packaging and offers superior compliance status compared to the original 1N4003.

1N4003G (Taiwan Semiconductor Corporation) is an alternative Active status substitute with ROHS3 Compliance. Electrical specifications are identical to 1N4003G-T with 1.0 V forward voltage. This part is suitable where the extended temperature range of 1N4003G-T is not required.

1N4003-TP (Micro Commercial Co) provides direct equivalence from the original manufacturer with ROHS3 Compliance and Not For New Designs status. This part maintains the original 1.1 V forward voltage specification and is suitable for legacy system support where manufacturer continuity is required.

1N4003-T (Diodes Incorporated) is classified as Last Time Buy status with ROHS3 Compliance. This part offers 1.0 V forward voltage and extended temperature range to -65°C ~ 150°C. Availability is limited due to Last Time Buy status.

Axial Package Alternatives (200 V, 1 A):

1N4003RLG (onsemi) provides electrical equivalence in Axial package configuration with ROHS3 Compliance and Not For New Designs status. This part is suitable for applications requiring Axial lead geometry.

1N3611 (Microchip Technology) is an Active status Axial package alternative with extended temperature range to -65°C ~ 175°C. RoHS non-compliant status limits use in new designs requiring RoHS compliance.

Enhanced Performance Alternatives (200 V, 1 A, Faster Recovery):

1N4935-E3/73 (Vishay General Semiconductor - Diodes Division) offers fast recovery characteristics (200 ns trr) compared to the standard recovery (2 µs) of the 1N4003. This part is Active status but RoHS non-compliant. Forward voltage is 1.2 V @ 1 A. Suitable for applications requiring improved switching performance.

1N5615GP-E3/73 (Vishay General Semiconductor - Diodes Division) provides the fastest recovery time (150 ns trr) with ROHS3 Compliance and Active status. Package is DO-15 (DO-204AC) Axial configuration. Forward voltage is 1.2 V @ 1 A. Extended temperature range to -65°C ~ 175°C. Suitable for high-frequency switching applications requiring RoHS compliance.

Extended Temperature Range Alternative (200 V, 1 A):

1N5614 (Microchip Technology) is an Active status Axial package part with extended operating temperature range to -65°C ~ 200°C. RoHS non-compliant. Reverse leakage is significantly lower at 500 nA @ 200 V. Forward voltage specification is 1.3 V @ 3 A. Suitable for high-temperature applications.

Parts Not Recommended as Direct Substitutes:

1N4004RLG (onsemi) has 400 V reverse voltage rating, exceeding the 200 V requirement of the 1N4003. This part is suitable only for applications requiring higher voltage ratings and is not a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can I use 1N4003G-T as a direct replacement for 1N4003?

A: Yes. The 1N4003G-T provides identical electrical specifications with 200 V reverse voltage and 1 A average rectified current in the same DO-41 package. The part is Active status and ROHS3 Compliant, making it suitable for both legacy support and new designs. Forward voltage is 1.0 V @ 1 A compared to 1.1 V in the original, which is within acceptable operating parameters.

Q: What is the difference between 1N4003-TP and 1N4003-T?

A: Both parts provide electrical equivalence to the 1N4003. The 1N4003-TP is manufactured by Micro Commercial Co (original manufacturer) with Not For New Designs status. The 1N4003-T is manufactured by Diodes Incorporated with Last Time Buy status. The 1N4003-T offers extended temperature range to -65°C ~ 150°C and lower forward voltage at 1.0 V @ 1 A. Selection depends on manufacturer preference and temperature requirements.

Q: Can I substitute an Axial package part for the DO-41 package 1N4003?

A: Axial package parts such as 1N4003RLG or 1N3611 provide electrical equivalence but differ in physical lead configuration. Substitution is possible only if the circuit board layout and mechanical mounting accommodate Axial leads. DO-41 and Axial packages are not mechanically interchangeable without board redesign.

Q: What is the advantage of 1N4935-E3/73 over 1N4003G-T?

A: The 1N4935-E3/73 offers faster reverse recovery time (200 ns versus 2 µs), making it suitable for higher-frequency switching applications. However, it is RoHS non-compliant and has slightly higher forward voltage at 1.2 V @ 1 A. Selection depends on whether fast recovery performance is required for the application.

Q: Is 1N5615GP-E3/73 compatible with 1N4003 applications?

A: The 1N5615GP-E3/73 provides electrical equivalence with 200 V reverse voltage and 1 A current rating. However, the package is DO-15 (DO-204AC) Axial, which differs from the DO-41 package of the 1N4003. Mechanical compatibility must be verified. The part offers advantages including ROHS3 Compliance, Active status, and fastest recovery time (150 ns), making it suitable for new designs where package change is acceptable.

Q: Why is 1N4004RLG listed but not recommended as a substitute?

A: The 1N4004RLG has a 400 V reverse voltage rating, which exceeds the 200 V specification of the 1N4003. While it will function in 1N4003 circuits, it is not a direct substitute because it is rated for higher voltage applications. Use 1N4004RLG only when higher voltage rating is specifically required.

Q: What does RoHS Compliance status mean for component selection?

A: ROHS3 Compliant parts meet Restriction of Hazardous Substances regulations and are required for applications subject to environmental compliance standards. RoHS non-compliant parts may be restricted in certain markets or applications. For new designs, ROHS3 Compliant parts are preferred. For legacy system support, RoHS status may be less critical depending on application requirements.

Q: Can I use 1N5614 in place of 1N4003?

A: The 1N5614 provides electrical equivalence with 200 V reverse voltage and 1 A current rating in Axial package. Advantages include extended temperature range to -65°C ~ 200°C and significantly lower reverse leakage at 500 nA @ 200 V. Disadvantages include RoHS non-compliant status and Axial package configuration. Substitution is suitable for high-temperature applications where package change is acceptable.

Q: What is the difference between Standard Recovery and Fast Recovery diodes?

A: Standard Recovery diodes have reverse recovery time greater than 500 ns, suitable for low-frequency rectification. Fast Recovery diodes have reverse recovery time of 500 ns or less, suitable for higher-frequency switching applications. The 1N4003 is Standard Recovery. Parts like 1N4935-E3/73 (200 ns) and 1N5615GP-E3/73 (150 ns) are Fast Recovery alternatives for applications requiring improved switching performance.

Q: Which substitute part has the best availability?

A: According to inventory data, 1N4935-E3/73 has the highest inventory at 96,080 pieces. 1N4003-T has 38,027 pieces, and 1N4003-TP has 34,146 pieces. Availability should be verified with suppliers as inventory levels change. For critical applications, confirm lead times and stock status before design finalization.

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