J175 JFET P-Channel 30V TO-92-3 Equivalent & Substitute Parts

Part Overview

The J175 is a P-Channel JFET transistor rated for 30V breakdown voltage with 350mW power dissipation in a TO-92-3 through-hole package. Originally manufactured by Central Semiconductor Corp, this part is now obsolete. Locating equivalent substitute components is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

J175

Central Semiconductor CorpIn Stock: 4812J175 Datasheet

Current PartRFQ

J175-D26Z

Fairchild SemiconductorIn Stock: 20165J175-D26Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the J175 is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• FET Type: P-Channel (required)
• Voltage - Breakdown (V(BR)GSS): 30V (required)
• Current - Drain (Idss): 7mA @ 15V (required)
• Voltage - Cutoff (VGS off): 3V @ 10nA (required)
• Resistance - RDS(On): 125 Ohms (required)
• Power - Max: 350mW (required)
• Package / Case: TO-92-3 (required)
• Mounting Type: Through Hole (required)

The J175-D26Z manufactured by Fairchild Semiconductor meets all electrical specifications and physical packaging requirements. This part maintains identical drain current, cutoff voltage, on-resistance, and power rating characteristics. The TO-92-3 package with formed leads ensures mechanical and electrical compatibility with existing PCB layouts and component footprints.

Parameter Comparison

Engineering Selection Recommendations

The J175-D26Z is the direct electrical and mechanical equivalent for the obsolete J175. Selection is based on the following factors:

Electrical Compatibility: All critical electrical parameters match exactly: 30V breakdown voltage, 7mA drain current, 3V cutoff voltage, 125 Ohm on-resistance, and 350mW power rating. These specifications ensure functional equivalence in circuit applications.

Package Compatibility: Both parts use the TO-92-3 through-hole package with identical pinout and mechanical dimensions. The J175-D26Z features formed leads, which provide improved mechanical stability during PCB assembly and soldering operations.

Product Status: The J175-D26Z maintains active production status with Fairchild Semiconductor, ensuring long-term availability and supply chain reliability compared to the obsolete J175.

Temperature Range Consideration: The J175-D26Z operates from -55°C to 150°C, compared to the J175's -65°C to 150°C range. For applications requiring operation below -55°C, alternative sourcing or design modification may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the J175-D26Z be used as a direct replacement for the J175 in existing designs?

A: Yes. The J175-D26Z is electrically and mechanically equivalent. All drain current, cutoff voltage, on-resistance, and power specifications are identical. The TO-92-3 package pinout and dimensions are compatible with existing PCB layouts.

Q: What is the difference between the J175 and J175-D26Z?

A: The primary differences are manufacturer (Central Semiconductor vs. Fairchild Semiconductor) and product status (obsolete vs. active). The J175-D26Z has a narrower operating temperature range (-55°C to 150°C vs. -65°C to 150°C). All electrical specifications are identical.

Q: Are there any compliance or certification differences?

A: The J175 is RoHS non-compliant. Compliance status for the J175-D26Z is not specified in the provided data. Verify RoHS and REACH compliance requirements with your supply chain or design specifications before final component selection.

Q: Does the TO-92-3 package with formed leads affect circuit performance?

A: No. Formed leads improve mechanical robustness during assembly and soldering but do not alter electrical performance. The electrical characteristics and pinout remain identical to standard TO-92-3 leads.

Q: What should I do if my application requires operation below -55°C?

A: The J175-D26Z operating range begins at -55°C. If your design requires -65°C operation, consult alternative P-Channel JFET options with matching electrical specifications and extended low-temperature ratings, or evaluate design modifications to operate within the -55°C to 150°C range.