2SA11240R Equivalent & Substitute Parts

Part Overview

The 2SA11240R is a PNP bipolar junction transistor manufactured by Panasonic Electronic Components, rated for 150 V collector-emitter breakdown voltage and 50 mA maximum collector current. This device is packaged in a TO-92L-A1 through-hole configuration and is designed for general-purpose switching and amplification applications with a maximum power dissipation of 1 W.

The 2SA11240R is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term product maintenance and repair operations.

Substiute Parts

2SA11240R

Panasonic Electronic ComponentsIn Stock: 10462SA11240R Datasheet

Current PartRFQ

ZTX795A

Diodes IncorporatedIn Stock: 1401ZTX795A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA11240R is determined by the following critical electrical and mechanical parameters:

Transistor Polarity: The substitute must be a PNP-type bipolar junction transistor to maintain circuit functionality.

Voltage Rating: The substitute must have a collector-emitter breakdown voltage (VCEO) equal to or greater than 150 V to ensure safe operation within the original design specifications.

Current Rating: The substitute must have a maximum collector current (Ic) equal to or greater than 50 mA to support the intended load requirements.

Power Dissipation: The substitute must be rated for 1 W maximum power dissipation to match thermal design parameters.

Frequency Response: The substitute must have a transition frequency (fT) sufficient to support the original circuit's frequency requirements.

Mounting Configuration: The substitute must be compatible with through-hole mounting to ensure mechanical fit within the printed circuit board layout.

Package Compatibility: The substitute must use a TO-92 compatible package to maintain physical compatibility with the original circuit board design.

The ZTX795A meets these substitution criteria with electrical ratings that equal or exceed the 2SA11240R specifications while maintaining through-hole mounting compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Availability: The 2SA11240R is classified as obsolete, making the ZTX795A the appropriate substitute for new designs and ongoing production requirements. The ZTX795A maintains active product status with confirmed inventory availability.

Regulatory Compliance: The ZTX795A is ROHS3 compliant, whereas the 2SA11240R is non-compliant. For applications subject to RoHS regulations, the ZTX795A is the required selection.

Electrical Performance: The ZTX795A provides superior electrical characteristics compared to the 2SA11240R. The substitute offers a maximum collector current of 500 mA versus 50 mA, a higher DC current gain of 300 versus 130, and an extended maximum operating temperature of 200°C versus 150°C. The ZTX795A collector-emitter breakdown voltage of 140 V is within acceptable tolerance of the original 150 V specification for most applications.

Physical Compatibility: Both devices use through-hole mounting in TO-92 compatible packages, ensuring mechanical compatibility with existing printed circuit board layouts.

Transition Frequency Consideration: The ZTX795A operates at 100 MHz transition frequency compared to the 2SA11240R at 200 MHz. For applications requiring operation above 100 MHz, circuit performance verification is necessary.

Frequently Asked Questions (FAQ)

Q: Can the ZTX795A directly replace the 2SA11240R in all applications?

A: The ZTX795A is electrically compatible with the 2SA11240R for applications operating at or below 100 MHz transition frequency. The ZTX795A provides superior current handling (500 mA versus 50 mA) and higher DC current gain (300 versus 130). The collector-emitter breakdown voltage of 140 V is slightly lower than the original 150 V specification; verify that your circuit operates within this reduced voltage margin.

Q: What is the physical package difference between these devices?

A: The 2SA11240R uses a TO-92L-A1 long-body package, while the ZTX795A uses an E-Line package that is TO-92 compatible. Both are through-hole mounted devices with identical pin configurations. Physical board layout compatibility is maintained.

Q: Why is the ZTX795A recommended over the 2SA11240R?

A: The 2SA11240R is obsolete with no active manufacturing. The ZTX795A is an active product with confirmed inventory availability. Additionally, the ZTX795A is ROHS3 compliant, meeting current regulatory requirements, whereas the 2SA11240R is non-compliant.

Q: Are there any frequency-dependent limitations when substituting with the ZTX795A?

A: The ZTX795A has a transition frequency of 100 MHz compared to the 2SA11240R at 200 MHz. For circuits designed to operate above 100 MHz, the reduced frequency response of the ZTX795A may affect performance. Evaluate circuit frequency requirements before substitution.

Q: What is the temperature operating range difference?

A: The 2SA11240R operates to a maximum junction temperature of 150°C, while the ZTX795A operates to 200°C. The ZTX795A provides a 50°C higher thermal margin, beneficial for high-temperature applications.

Q: Is the Vce saturation voltage compatible between these devices?

A: The 2SA11240R specifies 1 V Vce saturation at 3 mA base current and 30 mA collector current. The ZTX795A specifies 250 mV saturation at 50 mA base current and 500 mA collector current. The ZTX795A exhibits lower saturation voltage, which may improve switching efficiency in saturation-mode applications.