2N5115 JFET P-Channel Transistor Equivalent & Substitute Parts

Part Overview

The 2N5115 is a P-Channel JFET (Junction Field-Effect Transistor) rated for 30 V operation with 500 mW power dissipation in a TO-18 through-hole package. The original Central Semiconductor Corp version is classified as obsolete, making substitute sourcing necessary for ongoing production and maintenance applications. The Microchip Technology equivalent maintains electrical compatibility while offering active product status and enhanced availability.

Substiute Parts

2N5115

Central Semiconductor CorpIn Stock: 17582N5115 Datasheet

Current PartRFQ

2N5115

Microchip TechnologyIn Stock: 18062N5115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N5115 is determined by strict equivalence across the following electrical and mechanical parameters:

• Channel Type & Polarity: P-Channel JFET configuration
• Voltage Ratings: Vdss and V(BR)GSS both at 30 V minimum
• Power Dissipation: 500 mW maximum rating
• On-State Resistance: RDS(On) at 100 Ohms
• Temperature Range: -65°C to 200°C operating window
• Package Compatibility: TO-18 through-hole form factor (TO-206AA)

The Microchip Technology 2N5115 meets all these criteria and is classified as an active, directly interchangeable substitute. Differences in Idss and Vgs(off) specifications do not preclude substitution, as these parameters fall within acceptable device variation ranges for JFET transistors and do not affect circuit-level compatibility when used in standard amplification or switching applications.

Parameter Comparison

Engineering Selection Recommendations

The Microchip Technology 2N5115 is the direct substitute for the obsolete Central Semiconductor version. Selection is based on the following factors:

• Product Status: The Microchip part is active and in production, ensuring long-term availability and supply chain continuity.
• Electrical Equivalence: All critical voltage, current, and power parameters match or exceed the original specification.
• Military Grade Qualification: The Microchip device carries MIL-PRF-19500 qualification, providing enhanced reliability for applications requiring higher assurance levels.
• Package Compatibility: Identical TO-18 through-hole package ensures direct PCB compatibility without layout modifications.
• Compliance: Both versions carry EAR99 export classification. Note that the Microchip part is RoHS non-compliant; applications subject to RoHS requirements must evaluate alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the Microchip 2N5115 be used as a direct replacement for the Central Semiconductor 2N5115?

A: Yes. Both devices are P-Channel JFETs with identical voltage ratings (30 V Vdss), power dissipation (500 mW), on-state resistance (100 Ohms), and TO-18 package configuration. The devices are electrically and mechanically interchangeable.

Q: What is the significance of the higher Idss specification in the Microchip part (60 mA vs. 15 mA)?

A: Idss represents the drain-source current at zero gate-source voltage and is a natural parameter variation within JFET device families. The higher Microchip value falls within acceptable manufacturing tolerances and does not affect circuit compatibility in standard amplification or switching configurations.

Q: Does the military-grade qualification of the Microchip part affect compatibility?

A: No. Military qualification (MIL-PRF-19500) indicates enhanced manufacturing controls and reliability testing. It does not alter electrical or mechanical compatibility; it only provides additional assurance for applications requiring higher reliability standards.

Q: Are there any RoHS compliance considerations?

A: The Microchip 2N5115 is RoHS non-compliant. Applications subject to RoHS directives must evaluate alternative P-Channel JFET solutions or obtain RoHS exemptions where applicable.

Q: Can the 2N5115 be used in surface-mount applications?

A: No. The 2N5115 is a through-hole device in TO-18 package. Surface-mount alternatives require different part numbers and package types.

Q: What is the moisture sensitivity level (MSL) of the substitute part?

A: The Microchip 2N5115 carries MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.