2SC5508-A Equivalent & Substitute Parts Reference

Part Overview

The 2SC5508-A is an NPN RF bipolar junction transistor (BJT) designed for surface-mount applications, with a collector-emitter voltage rating of 3.3V, maximum transition frequency of 25GHz, and a maximum collector current of 35mA. This device features low noise, high gain, and is supplied in a SOT-343F package. The product status is Obsolete, making it necessary for engineers to find functionally equivalent alternatives, particularly for ongoing design support, component replacements, or maintenance of existing equipment using this device.

Key Parameters

Parameter	2SC5508-A Value
Manufacturer	CEL
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	3.3V
Frequency - Transition	25GHz
Noise Figure (dB Typ @ f)	1.1dB @ 2GHz
Gain	19dB
Power - Max	115mW
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5mA, 2V
Current - Collector (Ic) (Max)	35mA
Operating Temperature (Max)	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SOT-343F
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the 2SC5508-A are selected exclusively using the following allowed parameters: transistor type (NPN), maximum collector-emitter voltage (Vce), maximum transition frequency (fT), noise figure, gain, maximum power dissipation, DC current gain (hFE), maximum collector current (Ic), operating temperature rating, mounting type, and package/case compatibility. Only surface mount RF NPN BJTs with comparable or higher voltage, frequency, and current specifications are included. The final substitute grouping is based on direct matches within these parameters, ensuring form, fit, and functional compatibility strictly per provided data.

Parameter Comparison

Parameter	2SC5508-A	BFP450H6433XTMA1	BFP760H6327XTSA1	BFU630F,115	MAX2601ESA+T
Manufacturer	CEL	Infineon Technologies	Infineon Technologies	NXP USA Inc.	Analog Devices Inc./Maxim Integrated
Transistor Type	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	3.3V	5V	4V	5.5V	15V
Frequency - Transition	25GHz	24GHz	45GHz	21GHz	1GHz
Noise Figure (dB Typ @ f)	1.1dB @ 2GHz	1.25dB @ 1.8GHz	0.5–0.95dB @ 900MHz–5.5GHz	0.75–1.3dB @ 1.5GHz–5.8GHz	3.3dB @ 836MHz
Gain	19dB	15.5dB	16.5–29dB	13–22.5dB	11.6dB
Power - Max	115mW	450mW	240mW	200mW	6.4W
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 5mA, 2V	60 @ 50mA, 4V	160 @ 35mA, 3V	90 @ 5mA, 2V	100 @ 250mA, 3V
Current - Collector (Ic) (Max)	35mA	100mA	70mA	30mA	1.2A
Operating Temperature (Max)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-343F	SC-82A, SOT-343	SC-82A, SOT-343	SOT-343F	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Product Status	Obsolete	Active	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Selection of substitute parts for the 2SC5508-A should prioritize active status, availability, surface-mount compatibility, and equivalent or superior electrical parameters, as explicitly listed. All substitute parts provided have an MSL of 1, ensuring unlimited shelf life under standard storage. All substitutes specify “REACH Unaffected” compliance and are classified as “Active” products. These attributes satisfy compliance and supply continuity requirements for substitution.

Frequently Asked Questions (FAQ)

Q: Which parameters are required to determine an appropriate substitute for the 2SC5508-A?
A: Key parameters include transistor type, maximum collector-emitter voltage, transition frequency, noise figure, gain, maximum power dissipation, DC current gain (hFE), maximum collector current, operating temperature, mounting type, and package/case.

Q: Is package compatibility mandatory in substituting RF transistors like the 2SC5508-A?
A: Yes. Satisfactory fit and form require compatible surface-mount package types such as SOT-343F or SC-82A, SOT-343, or functionally similar outlines.

Q: Are all listed substitutes RoHS and REACH compliant?
A: All listed substitute parts are specified as “ROHS3 Compliant” and “REACH Unaffected.”

Q: Why is it necessary to find substitute parts for the 2SC5508-A?
A: The 2SC5508-A is designated as Obsolete, making substitutes essential for continued product design and maintenance.

Q: Do the substitute parts support equivalent temperature ranges and environmental classifications?
A: All parts listed have a maximum operating junction temperature of 150°C (TJ) and “MSL 1 (Unlimited),” aligning with the original part’s environmental specifications.

Q: Are the substitute transistors NPN type like the original 2SC5508-A?
A: Yes. All substitute parts specified are NPN bipolar junction transistors.

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