1N4249 Equivalent & Substitute Parts

Part Overview

The 1N4249 is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in an axial through-hole package. Manufactured by Microchip Technology, this component is classified as obsolete. The obsolete status necessitates identification of active equivalent and substitute parts to maintain design continuity and ensure procurement availability for new production and repair applications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A
Reverse Recovery Time (trr)	5 µs
Current - Reverse Leakage @ Vr	1 µA @ 1000 V
Speed	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	A, Axial
Operating Temperature - Junction	-65°C ~ 175°C

Substitute Part Grouping Explanation

Substitute parts for the 1N4249 are categorized based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Parametric Equivalents (Full Electrical Match): Parts that maintain identical voltage rating (1000 V), current rating (1 A), forward voltage characteristics, and recovery time specifications. These parts are direct functional replacements.

Similar Parts (Voltage or Speed Variation): Parts that maintain the 1000 V voltage rating and 1 A current rating but may differ in recovery speed characteristics or reverse leakage current specifications. These parts are suitable for applications where the specific recovery time is not critical.

Lower Voltage Alternatives (800 V Rating): Parts rated for 800 V reverse voltage with 1 A current capacity. These are suitable only for applications where the circuit operates below 800 V and do not require the full 1000 V rating of the original part.

The 1N4249 uses an axial through-hole package (DO-204AL / DO-41 equivalent). All substitute parts listed maintain through-hole mounting compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Speed	Tj (Operating)	Product Status
1N4249	Microchip Technology	1000 V	1 A	1.3 V @ 3 A	5 µs	1 µA @ 1000 V	Standard Recovery >500ns	-65°C ~ 175°C	Obsolete
1N5622	Microchip Technology	1000 V	1 A	1.3 V @ 3 A	2 µs	500 nA @ 1000 V	Standard Recovery >500ns	-65°C ~ 200°C	Active
JAN1N4249	Microchip Technology	1000 V	1 A	1.3 V @ 3 A	5 µs	1 µA @ 1000 V	Standard Recovery >500ns	-65°C ~ 175°C	Active
JANTX1N4249	Microchip Technology	1000 V	1 A	1.3 V @ 3 A	5 µs	1 µA @ 1000 V	Standard Recovery >500ns	-65°C ~ 175°C	Active
JANTXV1N4249	Microchip Technology	1000 V	1 A	1.3 V @ 3 A	5 µs	1 µA @ 1000 V	Standard Recovery >500ns	-65°C ~ 175°C	Active
1N4248GP-E3/54	Vishay General Semiconductor	800 V	1 A	1.2 V @ 1 A	Not specified	1 µA @ 800 V	Standard Recovery >500ns	-65°C ~ 160°C	Active
1N4248GP-E3/73	Vishay General Semiconductor	800 V	1 A	1.2 V @ 1 A	Not specified	1 µA @ 800 V	Standard Recovery >500ns	-65°C ~ 160°C	Active
1N4947GP-AP	Micro Commercial Co	800 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 800 V	Fast Recovery ≤ 500ns	-55°C ~ 150°C	Active
1N4947GP-TP	Micro Commercial Co	800 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 800 V	Fast Recovery ≤ 500ns	-55°C ~ 150°C	Active
1N4948GP-AP	Micro Commercial Co	1000 V	1 A	1.3 V @ 1 A	500 ns	5 µA @ 1000 V	Fast Recovery ≤ 500ns	-55°C ~ 150°C	Active
1N4948GP-TP	Micro Commercial Co	1000 V	1 A	1.3 V @ 1 A	500 ns	5 µA @ 1000 V	Fast Recovery ≤ 500ns	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Tier 1 - Parametric Equivalents (Recommended Primary Replacements):

JAN1N4249, JANTX1N4249, and JANTXV1N4249 are parametric equivalents manufactured by Microchip Technology with active product status. These parts maintain identical electrical specifications to the 1N4249, including 1000 V reverse voltage, 1 A current rating, 5 µs reverse recovery time, and 1 µA reverse leakage current. All three are qualified to MIL-PRF-19500/286 military specifications and are suitable for direct substitution in applications requiring military-grade components. JANTXV1N4249 offers the highest inventory availability at 1111 pieces.

Tier 2 - Enhanced Performance Equivalent:

1N5622 from Microchip Technology is an active product with identical voltage and current ratings but features improved performance characteristics: 2 µs reverse recovery time (faster than the original 5 µs) and 500 nA reverse leakage current (lower than the original 1 µA). The operating temperature range extends to 200°C compared to 175°C for the 1N4249. This part is suitable for applications where faster switching or lower leakage current provides system benefits.

Tier 3 - Voltage-Reduced Alternatives:

1N4248GP-E3/54 and 1N4248GP-E3/73 from Vishay General Semiconductor are active products rated for 800 V reverse voltage with 1 A current capacity. These parts are suitable only for applications where the circuit design operates below 800 V and does not require the full 1000 V rating. Both parts are RoHS3 compliant, unlike the 1N4249 which is RoHS non-compliant.

Tier 4 - Fast Recovery Alternatives:

1N4948GP-AP and 1N4948GP-TP from Micro Commercial Co maintain the 1000 V voltage rating and 1 A current rating but feature fast recovery characteristics (500 ns trr, ≤500 ns speed classification) compared to the standard recovery of the 1N4249. These parts are RoHS3 compliant and suitable for applications requiring faster switching performance. Operating temperature range is -55°C to 150°C, which is narrower than the 1N4249.

1N4947GP-AP and 1N4947GP-TP are rated for 800 V and are suitable only for reduced-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can I use 1N5622 as a direct replacement for 1N4249?

A: Yes. The 1N5622 maintains identical voltage (1000 V) and current (1 A) ratings with the same forward voltage characteristics. The faster reverse recovery time (2 µs versus 5 µs) and lower reverse leakage current (500 nA versus 1 µA) represent performance improvements. The extended operating temperature range to 200°C provides additional margin. This is a suitable direct replacement.

Q: What is the difference between JAN1N4249, JANTX1N4249, and JANTXV1N4249?

A: All three parts are parametric equivalents of the 1N4249 with identical electrical specifications. The designations indicate military qualification grades: JAN (standard military), JANTX (military with extended screening), and JANTXV (military with extended screening and voltage verification). All are qualified to MIL-PRF-19500/286. Selection depends on application requirements for military qualification level.

Q: Can I use 1N4248 parts as replacements for 1N4249?

A: The 1N4248 parts are rated for 800 V maximum reverse voltage, compared to 1000 V for the 1N4249. These parts are suitable only if your circuit design operates below 800 V and does not require the full 1000 V rating. If your application requires 1000 V capability, 1N4248 parts are not appropriate substitutes.

Q: What is the difference between 1N4947 and 1N4948 parts?

A: The 1N4947 is rated for 800 V reverse voltage, while the 1N4948 is rated for 1000 V. Both feature fast recovery characteristics (500 ns trr). For applications requiring 1000 V rating, use 1N4948. For applications operating below 800 V, either part is suitable, though 1N4948 provides additional voltage margin.

Q: Are the 1N4249 and 1N4248 parts compatible in the same circuit?

A: Compatibility depends on the circuit's voltage requirements. If the circuit operates below 800 V, the 1N4248 is compatible. If the circuit requires 1000 V blocking capability, the 1N4248 is not compatible and will fail under overvoltage conditions.

Q: What does "RoHS non-compliant" mean for the 1N4249?

A: The 1N4249 does not meet Restriction of Hazardous Substances (RoHS) compliance requirements. If your application or region requires RoHS compliance, select from active alternatives such as 1N4248GP-E3/54, 1N4248GP-E3/73, 1N4947GP-AP, 1N4947GP-TP, 1N4948GP-AP, or 1N4948GP-TP, which are RoHS3 compliant.

Q: What is the significance of "Tape & Reel (TR)" packaging?

A: Tape & Reel packaging indicates the parts are supplied on continuous tape suitable for automated assembly equipment. Parts without specified packaging designation may be supplied in alternative formats such as bulk or tube. Verify packaging requirements with your procurement process.

Q: Why is the 1N4249 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active equivalent parts are available from the same manufacturer (Microchip Technology) with identical or improved specifications, ensuring design continuity without requiring circuit modifications.

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