J110G JFET N-Channel Transistor Equivalent & Substitute Parts

Part Overview

The J110G is an N-Channel JFET transistor manufactured by onsemi, rated for 25 V breakdown voltage with 310 mW maximum power dissipation in a Through Hole TO-92 package. This part is classified as Obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity. The J110G serves applications requiring N-Channel junction field-effect transistor functionality in legacy and maintenance scenarios.

Substiute Parts

J110G

onsemiIn Stock: 701J110G Datasheet

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J109-D26Z

onsemiIn Stock: 40106J109-D26Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the J110G is determined by strict electrical and mechanical compatibility across the following parameters:

• FET Type: Must remain N-Channel
• Voltage - Breakdown (V(BR)GSS): Must equal or exceed 25 V
• Package / Case: Must be compatible with TO-92-3 footprint and Through Hole mounting
• Electrical characteristics: Drain current (Idss), cutoff voltage (VGS off), and on-resistance (RDS(On)) must support the original application requirements

The J109-D26Z qualifies as a direct substitute based on matching FET type, equal breakdown voltage rating, identical package family (TO-92-3), and Through Hole mounting compatibility. Enhanced electrical performance (higher Idss, lower RDS(On), higher power rating) and Active product status provide improved availability and thermal performance margins.

Parameter Comparison

Engineering Selection Recommendations

The J109-D26Z is the qualified substitute for the J110G based on the following engineering criteria:

• Electrical Compatibility: Identical breakdown voltage (25 V) and N-Channel configuration ensure functional equivalence in circuit applications.
• Package Compatibility: Both parts use TO-92-3 Through Hole packages with compatible pinouts, enabling direct board-level substitution.
• Product Status: The J109-D26Z holds Active status with ROHS3 compliance, ensuring long-term availability and regulatory alignment compared to the Obsolete J110G.
• Performance Enhancement: The J109-D26Z provides superior electrical performance with lower on-resistance (12 Ω vs. 18 Ω), higher drain current capability (40 mA vs. 10 mA), and increased power rating (625 mW vs. 310 mW), delivering improved thermal and operational margins.
• Regulatory Compliance: Both parts maintain REACH Unaffected and EAR99 ECCN classifications, preserving export and environmental compliance status.

Frequently Asked Questions (FAQ)

Q: Can the J109-D26Z directly replace the J110G on existing PCBs?

A: Yes. Both parts use the TO-92-3 Through Hole package with identical pinout configuration. Physical and electrical compatibility supports direct board-level substitution without layout modifications.

Q: What are the key electrical differences between these parts?

A: The J109-D26Z exhibits lower on-resistance (12 Ω vs. 18 Ω), higher drain current (40 mA vs. 10 mA at 15 V), and higher power dissipation capability (625 mW vs. 310 mW). These differences represent performance enhancements that expand operational margins without compromising compatibility.

Q: Why is the J110G classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The J109-D26Z, classified as Active, represents the current production equivalent with enhanced specifications and long-term availability assurance.

Q: Are there compliance or regulatory differences?

A: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99). The J109-D26Z adds ROHS3 compliance, meeting current environmental regulatory requirements.

Q: What temperature range should be considered for design?

A: The J110G operates to 135 °C maximum junction temperature. The J109-D26Z extends this to 150 °C maximum, providing additional thermal margin. Design thermal calculations should reference the specific part selected.

Q: Is the J109-D26Z available in the same packaging format?

A: Yes. The J109-D26Z is supplied in Cut Tape (CT) packaging with formed leads in the TO-92-3 configuration, maintaining mechanical compatibility with J110G applications.