Equivalent & Substitute Parts Reference for 2N4239

Part Overview

The Microchip Technology 2N4239 is an NPN Bipolar Junction Transistor (BJT) designed for through-hole applications in a TO-39 (TO-205AD) metal can package. It supports a maximum collector current of 1A, collector-emitter voltage of 80V, and maximum power dissipation of 1W, making it suitable for general amplification and switching tasks. The product is currently listed as “Active” with sufficient inventory. Alternative models are necessary for scenarios involving supply chain optimization, compliance requirements, or enhanced electrical characteristics within the same mechanical footprint.

Substiute Parts

2N4239

Microchip TechnologyIn Stock: 14162N4239 Datasheet

Current PartRFQ

2N2405 PBFREE

Central Semiconductor CorpIn Stock: 16832N2405 PBFREE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined strictly by matching the following provided parameters: transistor type (NPN), collector current (1 A), collector-emitter breakdown voltage (at least 80 V), Vce saturation, collector cutoff current, DC current gain (minimum value at specified Ic and Vce), maximum power dissipation, operating temperature range, mounting type (through-hole), and package compatibility (TO-205AD, TO-39-3 Metal Can). Only listed parts conforming precisely to these characteristics qualify as drop-in equivalents for the 2N4239 in Transistors, Bipolar (BJT) applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Microchip Technology 2N4239 and Central Semiconductor Corp 2N2405 PBFREE are listed as “Active” and are available in comparable through-hole packages. The 2N2405 PBFREE offers ROHS3 compliance, which may be necessary for certain applications requiring documented environmental compliance. Both models meet REACH standards. Product status and certifications provided form the sole basis for selection among equivalent Transistors, Bipolar (BJT) in the TO-205AD, TO-39-3 Metal Can package family.

Frequently Asked Questions (FAQ)

Q1: What key parameters determine eligible substitutes for Bipolar (BJT) transistors?
A1: Electrical equivalency is defined by transistor type, collector current, collector-emitter breakdown voltage, power rating, DC current gain, cutoff current, operating temperature range, and mechanical package compatibility.

Q2: Are 2N4239 and 2N2405 PBFREE interchangeable in through-hole TO-39 applications?
A2: Both NPN types confirm mechanical compatibility in TO-205AD, TO-39-3 Metal Can packages, with closely matched electrical ratings and mounting type.

Q3: What compliance certifications are included for substitute selection?
A3: 2N4239 is REACH Unaffected; 2N2405 PBFREE is REACH Unaffected and ROHS3 Compliant, supporting global material compliance criteria for electronic components.

Q4: Does the operating temperature range affect substitute compatibility?
A4: Both parts are specified for -65°C ~ 200°C (TJ), supporting identical environmental operating conditions.

Q5: Are specific datasheet electrical comparisons such as Vce(sat) or hFE relevant to substitute selection?
A5: Only direct values provided in the input are considered for compatibility; all values shown in the comparison table are eligible for direct assessment in component selection.