1N2158R Equivalent & Substitute Parts

Part Overview

The 1N2158R is a general-purpose rectifier diode manufactured by Solid State Inc., rated for 400 V DC reverse voltage and 40 A average rectified current in a stud mount DO-5 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support component procurement, inventory management, and design flexibility.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	40 A
Voltage - Forward (Vf) (Max) @ If	1.19 V @ 90 A
Current - Reverse Leakage @ Vr	10 µA @ 400 V
Speed	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Stud Mount
Package / Case	DO-203AB, DO-5, Stud
Operating Temperature - Junction	-65°C ~ 200°C
Technology	Standard, Reverse Polarity

Substitute Part Grouping Explanation

Substitute parts for the 1N2158R are grouped into two categories based on electrical and mechanical parameter alignment:

Category 1: Full Parametric Equivalents (40 A Rating) Parts matching all key electrical specifications: 400 V reverse voltage, 40 A average rectified current, 1.19 V forward voltage at 90 A, 10 µA reverse leakage at 400 V, standard recovery speed, and stud mount DO-5 packaging. These parts are direct functional replacements with identical electrical performance.

Category 2: Parametric Equivalent with Current Derating (35 A Rating) Parts matching 400 V reverse voltage and stud mount DO-5 packaging but with reduced average rectified current rating of 35 A. These parts share identical forward voltage, reverse leakage, recovery speed, and temperature range specifications but operate at lower current capacity.

Substitution eligibility is determined by:

Voltage - DC Reverse (Vr) (Max): 400 V
Mounting Type: Stud Mount
Package / Case: DO-203AB, DO-5, Stud
Operating Temperature - Junction: -65°C ~ 200°C
Technology: Standard, Reverse Polarity

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Ir @ Vr	Speed	Mounting	Package	Tj Range	RoHS Status	Inventory (Pcs)
1N2158R	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	698
1N1196R	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	699
1N1196RA	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	1023
1N1437R	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	1109
1N2025R	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	907
1N2276R	Solid State Inc.	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	ROHS3 Compliant	836
1N2283R	Microchip Technology	400 V	35 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	Not Specified	797
1N3212R	Microchip Technology	400 V	40 A	1.19 V @ 90 A	10 µA @ 400 V	Standard Recovery >500ns	Stud Mount	DO-5	-65°C ~ 200°C	RoHS non-compliant	947

Engineering Selection Recommendations

Full Parametric Equivalents (40 A, ROHS3 Compliant)

Parts 1N1196R, 1N1196RA, 1N1437R, 1N2025R, and 1N2276R are direct electrical and mechanical equivalents to the 1N2158R. All are manufactured by Solid State Inc., maintain identical 400 V / 40 A ratings, and carry ROHS3 compliance certification. These parts are suitable for direct substitution in applications requiring full parameter matching and regulatory compliance.

Full Parametric Equivalent (40 A, Microchip Technology)

Part 1N3212R matches the 1N2158R in voltage, current, forward voltage, reverse leakage, recovery speed, mounting type, and package. However, this part is RoHS non-compliant and manufactured by Microchip Technology. Selection of this part is appropriate only in applications where RoHS compliance is not required.

Parametric Equivalent with Current Derating (35 A)

Part 1N2283R, manufactured by Microchip Technology, is rated for 35 A average rectified current versus the 1N2158R's 40 A rating. All other electrical parameters, mounting type, and package specifications are identical. This part is suitable for applications where the 35 A current rating satisfies design requirements and RoHS compliance status is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can 1N1196R be used as a direct replacement for 1N2158R?

A: Yes. The 1N1196R is a full parametric equivalent with identical voltage rating (400 V), current rating (40 A), forward voltage (1.19 V @ 90 A), reverse leakage (10 µA @ 400 V), recovery speed, stud mount configuration, DO-5 package, and ROHS3 compliance.

Q: What is the difference between the 1N2158R and 1N2283R?

A: The 1N2283R is rated for 35 A average rectified current, compared to the 1N2158R's 40 A rating. All other electrical specifications, including voltage, forward voltage, reverse leakage, recovery speed, temperature range, and stud mount DO-5 packaging, are identical. The 1N2283R is suitable only for applications requiring 35 A or less.

Q: Is the 1N3212R compatible with the 1N2158R?

A: The 1N3212R is electrically and mechanically compatible with the 1N2158R. Both are rated for 400 V and 40 A with identical forward voltage, reverse leakage, recovery speed, and stud mount DO-5 packaging. However, the 1N3212R is RoHS non-compliant, whereas the 1N2158R is ROHS3 compliant. Selection depends on regulatory requirements.

Q: Why are there multiple part numbers with identical specifications?

A: Multiple part numbers with identical electrical and mechanical specifications reflect different manufacturing lineages, design revisions, or supplier part designations within the same product category. All listed equivalents meet the same functional requirements and can be selected based on availability, compliance requirements, and inventory status.

Q: Can I use a 35 A rated diode in place of a 40 A rated diode?

A: A 35 A rated diode can be used only if the application circuit operates at or below 35 A average rectified current. Using a lower-rated component in a circuit designed for 40 A operation will result in component overstress and potential failure. Circuit current requirements must be verified before substitution.

Q: What does stud mount DO-5 packaging mean?

A: Stud mount DO-5 (DO-203AB) is a through-hole package with two leads mounted on a metal stud. The stud provides mechanical support and thermal dissipation. This package type is mechanically and electrically compatible across all listed equivalent parts.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts listed are available in stud mount DO-5 (DO-203AB) configuration. Packaging format is consistent across all equivalents, ensuring mechanical compatibility in circuit board layouts and mounting hardware.

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