2SC24040DL Equivalent & Substitute Parts

Part Overview

The 2SC24040DL is an RF transistor manufactured by Panasonic Electronic Components, classified as an NPN bipolar junction transistor (BJT) designed for radio frequency applications. This device operates at a transition frequency of 650MHz with a maximum collector-emitter breakdown voltage of 20V and maximum power dissipation of 150mW. The part is mounted in a Surface Mount Mini3-G1 package (TO-236-3, SC-59, SOT-23-3 equivalent).

The 2SC24040DL is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	20V	V
Frequency - Transition	650MHz	MHz
Noise Figure (Typ @ f)	3.3dB @ 100MHz	dB
Gain	24dB	dB
Power - Max	150mW	mW
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 1mA, 6V	—
Current - Collector (Ic) (Max)	15mA	mA
Operating Temperature (TJ)	150°C	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 2SC24040DL is determined by electrical and mechanical compatibility within the RF transistor category. The primary substitution criteria are:

Electrical Compatibility Parameters:

Transistor type must be NPN
Collector-emitter breakdown voltage must be greater than or equal to 20V
Transition frequency must support or exceed 650MHz operation
Maximum collector current must accommodate the application requirement (≥15mA)
Maximum power dissipation must support the thermal requirements (≥150mW)
Operating temperature range must include 150°C (TJ)

Mechanical Compatibility Parameters:

Surface Mount mounting type
Package form factor compatibility with PCB layout constraints

The substitute parts identified for the 2SC24040DL are grouped based on their ability to meet these electrical and mechanical requirements while maintaining functional equivalence in RF applications operating at or above 650MHz.

Parameter Comparison

Parameter	2SC24040DL	BFR380FH6327XTSA1	55GN01FA-TL-H	BF776H6327XTSA1	2SC5415AF-TD-E	BFR193FH6327XTSA1
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	20V	9V	10V	4.7V	12V	12V
Frequency - Transition	650MHz	14GHz	4.5GHz ~ 5.5GHz	46GHz	6.7GHz	8GHz
Noise Figure (Typ @ f)	3.3dB @ 100MHz	1.1dB ~ 1.6dB @ 1.8GHz ~ 3GHz	1.9dB @ 1GHz	0.8dB ~ 1.3dB @ 1.8GHz ~ 6GHz	1.1dB @ 1GHz	1dB ~ 1.6dB @ 900MHz ~ 1.8GHz
Gain	24dB	9.5dB ~ 13.5dB	11dB ~ 19dB @ 1GHz ~ 400MHz	24dB	9dB	12.5dB
Power - Max	150mW	380mW	250mW	200mW	800mW	580mW
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 1mA, 6V	90 @ 40mA, 3V	100 @ 10mA, 5V	180 @ 30mA, 3V	90 @ 30mA, 5V	70 @ 30mA, 8V
Current - Collector (Ic) (Max)	15mA	80mA	70mA	50mA	100mA	80mA
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	SOT-723	SC-81	SC-82A, SOT-343	TO-243AA	SOT-723
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant

Engineering Selection Recommendations

Product Status Considerations:

The 2SC24040DL is obsolete and no longer manufactured by Panasonic Electronic Components. Among the substitute parts provided, the following are currently active products:

BFR380FH6327XTSA1 (Infineon Technologies) — Active status
55GN01FA-TL-H (onsemi) — Active status
BF776H6327XTSA1 (Infineon Technologies) — Active status
BFR193FH6327XTSA1 (Infineon Technologies) — Active status

The parts 2SC5415AF-TD-E (onsemi) is listed as obsolete.

Compliance and Certification:

All active substitute parts carry ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with current environmental and hazardous substance directives. All parts are classified under ECCN EAR99 for export control purposes.

Voltage Derating Consideration:

The 2SC24040DL operates at a maximum collector-emitter breakdown voltage of 20V. All substitute parts operate at lower maximum voltages (ranging from 4.7V to 12V). Circuit designs must ensure that operating voltages do not exceed the substitute part's voltage rating. Applications requiring the full 20V capability may require circuit redesign or alternative component selection outside the provided substitute list.

Frequency and Gain Characteristics:

All substitute parts exceed the 650MHz transition frequency requirement, with frequencies ranging from 4.5GHz to 46GHz. The BF776H6327XTSA1 and 2SC24040DL both provide 24dB gain, making this part the closest electrical match for gain-critical applications. Other substitutes provide lower gain values (9dB to 12.5dB) and may require circuit compensation.

Current and Power Handling:

All substitute parts support maximum collector currents exceeding the 2SC24040DL requirement of 15mA and power dissipation exceeding 150mW, providing design margin for thermal and current management.

Frequently Asked Questions (FAQ)

Q: Can the 2SC24040DL be directly replaced with any of the listed substitute parts?

A: Direct replacement depends on circuit voltage requirements. All substitutes operate at lower maximum collector-emitter breakdown voltages than the 2SC24040DL (20V). If the circuit operates below the substitute part's voltage rating, substitution is feasible. Circuits designed for the full 20V capability require redesign or alternative components.

Q: Which substitute part provides the closest electrical match to the 2SC24040DL?

A: The BF776H6327XTSA1 provides identical 24dB gain and exceeds the 650MHz frequency requirement at 46GHz. However, its 4.7V maximum collector-emitter breakdown voltage is significantly lower than the 2SC24040DL's 20V rating. The BFR193FH6327XTSA1 offers 12V breakdown voltage with 8GHz transition frequency and 12.5dB gain, providing a better voltage match for applications not requiring the full 20V capability.

Q: Are there package compatibility issues with the substitute parts?

A: Yes. The 2SC24040DL uses a Mini3-G1 package (TO-236-3, SC-59, SOT-23-3). Substitute parts use different packages: BFR380FH6327XTSA1 and BFR193FH6327XTSA1 use SOT-723, 55GN01FA-TL-H uses SC-81, BF776H6327XTSA1 uses SOT-343, and 2SC5415AF-TD-E uses TO-243AA. PCB layout modifications are required for any substitution.

Q: What is the inventory status of the substitute parts?

A: All substitute parts have significant inventory availability: BFR380FH6327XTSA1 (15,597 pcs), CPH6001A-TL-E (17,300 pcs), 2SC5415AF-TD-E (12,400 pcs), 55GN01FA-TL-H (8,523 pcs), and BFR193FH6327XTSA1 (3,095 pcs). The 2SC24040DL has 860 pcs in stock but is obsolete.

Q: Do all substitute parts meet current environmental compliance standards?

A: The active substitute parts (BFR380FH6327XTSA1, 55GN01FA-TL-H, BF776H6327XTSA1, BFR193FH6327XTSA1, and CPH6001A-TL-E) are ROHS3 compliant and REACH Unaffected. The obsolete 2SC5415AF-TD-E does not list compliance status in the provided data.

Q: What noise figure performance should be expected with substitute parts?

A: The 2SC24040DL provides 3.3dB noise figure at 100MHz. Substitute parts provide lower noise figures at higher frequencies: BFR380FH6327XTSA1 (1.1dB–1.6dB @ 1.8GHz–3GHz), 55GN01FA-TL-H (1.9dB @ 1GHz), BF776H6327XTSA1 (0.8dB–1.3dB @ 1.8GHz–6GHz), 2SC5415AF-TD-E (1.1dB @ 1GHz), and BFR193FH6327XTSA1 (1dB–1.6dB @ 900MHz–1.8GHz). Noise performance improves at higher frequencies with all substitutes.

Q: Are there thermal management differences between the 2SC24040DL and substitute parts?

A: All parts share the same maximum operating temperature of 150°C (TJ). Substitute parts support higher maximum power dissipation (200mW to 800mW) compared to the 2SC24040DL (150mW), providing additional thermal margin. Package differences may affect thermal coupling to PCB and heatsinking capability.

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