1N3307 Equivalent & Substitute Parts

Part Overview

The 1N3307 is a 50-watt Zener diode rated at 8.2 V nominal with ±20% tolerance, housed in a DO-5 stud mount package. Manufactured by Solid State Inc., this component is classified as Active and RoHS3 compliant. The 1N3307 serves as a voltage regulation and protection element in power supply circuits and transient suppression applications. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the DO-5 package family, allowing for component sourcing flexibility while maintaining circuit performance requirements.

Substiute Parts

1N3307

Solid State Inc.In Stock: 9911N3307 Datasheet

Current PartRFQ

1N3307A

Microchip TechnologyIn Stock: 8551N3307A Datasheet

Parametric EquivalentRFQ

1N3307B

Microchip TechnologyIn Stock: 8381N3307B Datasheet

Parametric EquivalentRFQ

1N3307R

Solid State Inc.In Stock: 11911N3307R Datasheet

Parametric EquivalentRFQ

1N3307RA

Microchip TechnologyIn Stock: 12271N3307RA Datasheet

Parametric EquivalentRFQ

1N3307RB

Microchip TechnologyIn Stock: 10901N3307RB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N3307 is determined by the following critical parameters:

Electrical Specifications:

• Zener voltage: 8.2 V nominal (all substitutes match this specification)
• Maximum power dissipation: 50 W (all substitutes match this specification)
• Impedance (Max): 0.4 Ohms (all substitutes match this specification)
• Forward voltage: 1.5 V @ 10 A (all substitutes match this specification)
• Operating temperature range: -65°C to 175°C (all substitutes match this specification)

Mechanical Specifications:

• Package type: DO-5 stud mount (all substitutes use DO-203AB, DO-5, Stud package)
• Mounting configuration: Stud Mount or Chassis, Stud Mount (compatible with original)

Tolerance Variations: Substitute parts are available with three tolerance grades: ±20%, ±10%, and ±5%. The tolerance specification does not affect functional substitution but indicates voltage regulation precision. Parts with tighter tolerances (±10% and ±5%) provide improved voltage accuracy compared to the original ±20% specification.

All identified substitutes maintain identical electrical performance and mechanical compatibility with the 1N3307 base product number designation.

Parameter Comparison

Engineering Selection Recommendations

RoHS3 Compliant Substitutes: The 1N3307 and 1N3307R are both manufactured by Solid State Inc. and carry ROHS3 Compliant status. These parts are direct substitutes for applications requiring RoHS3 compliance certification. Both maintain identical electrical specifications and ±20% tolerance.

Microchip Technology Alternatives: The 1N3307A, 1N3307B, 1N3307RA, and 1N3307RB are manufactured by Microchip Technology and are classified as RoHS non-compliant. These substitutes are electrically equivalent but carry different tolerance specifications (±10% and ±5%). Selection of Microchip alternatives is appropriate for applications where RoHS compliance is not a requirement and where improved voltage regulation precision is beneficial.

Tolerance-Based Selection:

• ±20% tolerance (1N3307, 1N3307R): Standard voltage regulation applications
• ±10% tolerance (1N3307A, 1N3307RA): Applications requiring improved voltage accuracy
• ±5% tolerance (1N3307B, 1N3307RB): Precision voltage regulation applications

All substitute parts maintain Active product status and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can 1N3307A or 1N3307B be used as direct replacements for 1N3307?

A: Yes. The 1N3307A and 1N3307B are electrically equivalent to the 1N3307, sharing identical zener voltage (8.2 V), maximum power rating (50 W), impedance (0.4 Ω), and operating temperature range (-65°C to 175°C). Both are housed in the DO-5 package with stud mount configuration. The primary differences are tolerance specification and RoHS compliance status.

Q: What is the difference between 1N3307R and the original 1N3307?

A: The 1N3307R is functionally identical to the 1N3307. Both are manufactured by Solid State Inc., carry ROHS3 Compliant status, and share all electrical specifications and ±20% tolerance. The designation difference reflects packaging variation (Box versus original packaging).

Q: Why do some substitutes show ±10% or ±5% tolerance instead of ±20%?

A: Tolerance specification indicates the allowable deviation of the zener voltage from the nominal 8.2 V rating. ±20% tolerance allows deviation from 6.56 V to 9.84 V. ±10% tolerance restricts deviation to 7.38 V to 9.02 V. ±5% tolerance restricts deviation to 7.79 V to 8.61 V. Tighter tolerances provide improved voltage regulation precision for applications requiring more stable reference voltages.

Q: Are Microchip Technology substitutes compatible with RoHS3 compliant designs?

A: No. The 1N3307A, 1N3307B, 1N3307RA, and 1N3307RB are classified as RoHS non-compliant. For designs requiring RoHS3 compliance certification, use 1N3307 or 1N3307R, both manufactured by Solid State Inc.

Q: Do all substitutes use the same DO-5 package?

A: Yes. All substitute parts use the DO-203AB, DO-5, Stud package configuration. Mechanical compatibility is maintained across all identified substitutes. Mounting type variations (Stud Mount versus Chassis, Stud Mount) are compatible with standard stud mount applications.

Q: What is the reverse leakage current specification for the 1N3307?

A: The reverse leakage current specification is not provided for the original 1N3307. Microchip Technology substitutes (1N3307A, 1N3307B, 1N3307RA, 1N3307RB) specify 50 µA @ 5.4 V reverse leakage current.