2N5457_D74Z JFET N-Channel Equivalent & Substitute Parts

Part Overview

The 2N5457_D74Z is an N-Channel JFET transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. It features a 25 V breakdown voltage rating and 625 mW maximum power dissipation in a through-hole TO-92-3 package. The device is currently classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The primary substitute maintains identical electrical characteristics while offering improved availability and modern packaging options.

Substiute Parts

2N5457_D74Z

onsemiIn Stock: 7302N5457_D74Z Datasheet

Current PartRFQ

MMBF5457

onsemiIn Stock: 35508MMBF5457 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N5457_D74Z is determined by strict equivalence of electrical parameters and functional compatibility. The substitute part MMBF5457 maintains identical electrical specifications across all critical parameters: N-Channel FET type, 25 V breakdown voltage, 1 mA drain current at Vgs=0, 500 mV cutoff voltage, and 7 pF input capacitance. The key differentiator is the package format: MMBF5457 uses surface-mount SOT-23-3 packaging instead of through-hole TO-92-3, and has a reduced maximum power rating of 350 mW versus 625 mW. Substitution is valid when the application's power dissipation requirements do not exceed 350 mW and the PCB design accommodates surface-mount components.

Parameter Comparison

Engineering Selection Recommendations

MMBF5457 is the direct electrical equivalent for 2N5457_D74Z applications where power dissipation remains below 350 mW. Selection of MMBF5457 is supported by its active product status, ensuring long-term availability and supply chain stability compared to the obsolete 2N5457_D74Z. Both devices carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), maintaining regulatory compliance. The surface-mount SOT-23-3 package of MMBF5457 offers improved thermal characteristics and reduced board space compared to through-hole TO-92-3, making it suitable for modern PCB designs. Applications requiring power dissipation above 350 mW must retain the 2N5457_D74Z or evaluate alternative device families with higher power ratings.

Frequently Asked Questions (FAQ)

Q: Can MMBF5457 directly replace 2N5457_D74Z in existing through-hole designs?

A: Electrical substitution is valid; however, package conversion is required. MMBF5457 uses surface-mount SOT-23-3 packaging while 2N5457_D74Z uses through-hole TO-92-3. PCB redesign or adapter solutions are necessary for mechanical compatibility.

Q: What is the primary limitation when substituting MMBF5457 for 2N5457_D74Z?

A: Maximum power dissipation is reduced from 625 mW to 350 mW. Applications exceeding 350 mW power dissipation cannot use MMBF5457 as a substitute.

Q: Are the electrical characteristics identical between these devices?

A: Yes. Breakdown voltage, drain current, cutoff voltage, input capacitance, and operating temperature range are identical across both parts.

Q: Why is MMBF5457 preferred despite lower power rating?

A: MMBF5457 maintains active product status, ensuring availability and supply continuity. The 2N5457_D74Z is obsolete, creating sourcing challenges for new production.

Q: Do both parts share the same regulatory compliance?

A: Yes. Both devices are REACH Unaffected and classified as EAR99, maintaining identical regulatory standing.