PN4117A_D26Z Equivalent & Substitute Parts

Part Overview

The PN4117A_D26Z is an N-Channel JFET transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. It features a 40 V breakdown voltage rating and 350 mW maximum power dissipation in a through-hole TO-92-3 package. The device is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PN4117A_D26Z

onsemiIn Stock: 1101PN4117A_D26Z Datasheet

Current PartRFQ

MMBF4117

onsemiIn Stock: 124743MMBF4117 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PN4117A_D26Z is determined by matching the following critical electrical and mechanical parameters:

• N-Channel JFET topology
• Voltage - Breakdown (V(BR)GSS): 40 V minimum
• Current - Drain (Idss) @ Vds (Vgs=0): 30 µA @ 10 V
• Voltage - Cutoff (VGS off) @ Id: 600 mV @ 1 nA
• Input Capacitance (Ciss): 3 pF @ 10V maximum
• Operating Temperature Range: -55°C to 150°C
• Package compatibility: Through-hole or surface-mount variants of the same electrical series

The MMBF4117 qualifies as a direct electrical equivalent, sharing identical electrical specifications while differing in mounting technology (surface mount SOT-23-3 versus through-hole TO-92-3) and maximum power rating (225 mW versus 350 mW).

Parameter Comparison

*Power rating difference: MMBF4117 rated at 225 mW versus PN4117A_D26Z at 350 mW. Applications requiring power dissipation above 225 mW require thermal analysis.

Engineering Selection Recommendations

The MMBF4117 provides electrical equivalence to the PN4117A_D26Z based on matching gate-source breakdown voltage, drain current characteristics, cutoff voltage, and input capacitance specifications. Selection between these devices depends on circuit implementation requirements:

• PN4117A_D26Z: Through-hole mounting, higher power rating (350 mW), obsolete status
• MMBF4117: Surface-mount SOT-23-3 package, active product status, lower power rating (225 mW), ROHS3 compliant

Both devices share identical electrical performance parameters and operating temperature range. The MMBF4117 is currently in active production with higher inventory availability (124,662 pcs) compared to the obsolete PN4117A_D26Z (1,056 pcs remaining stock).

Frequently Asked Questions (FAQ)

Q: Can MMBF4117 directly replace PN4117A_D26Z in existing designs?

A: Electrical substitution is valid when circuit power dissipation remains below 225 mW. Package differences (SOT-23-3 surface mount versus TO-92-3 through hole) require PCB layout modification. Pin configuration remains identical across both devices.

Q: What is the significance of the 125 mW power rating difference?

A: The PN4117A_D26Z is rated for 350 mW maximum power dissipation, while MMBF4117 is rated for 225 mW. Applications operating above 225 mW require thermal management analysis or retention of the original through-hole device if power budget permits.

Q: Are there compliance differences between these parts?

A: MMBF4117 carries ROHS3 compliance certification. Both devices are REACH unaffected and classified under ECCN EAR99. Moisture sensitivity level is 1 (unlimited) for both parts.

Q: What mounting considerations apply to substitution?

A: PN4117A_D26Z uses through-hole TO-92-3 package with formed leads for wave or hand soldering. MMBF4117 uses surface-mount SOT-23-3 package requiring reflow soldering. PCB footprint and assembly process changes are necessary for substitution.

Q: Is the MMBF4117 suitable for high-temperature applications?

A: Both devices operate across -55°C to 150°C junction temperature range, supporting identical thermal specifications. MMBF4117 is suitable for applications within this temperature envelope.