2N5770 Equivalent & Substitute Parts

Part Overview

The 2N5770 is an RF transistor NPN manufactured by onsemi, rated for 15V collector-emitter breakdown voltage with a maximum power dissipation of 350mW in a through-hole TO-92-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The 2N5770 operates across a temperature range of -55°C to 150°C and delivers 50mA maximum collector current with a noise figure of 6dB at 60MHz.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	15V	V
Current - Collector (Ic) (Max)	50mA	mA
Power - Max	350mW	mW
Noise Figure (Typ @ f)	6dB @ 60MHz	dB
Gain	15dB	dB
DC Current Gain (hFE) (Min)	50 @ 8mA, 10V	—
Operating Temperature	-55°C to 150°C	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the 2N5770 is determined by the following critical parameters: transistor type (NPN), voltage rating (15V maximum collector-emitter breakdown), current capability (50mA maximum collector current), power dissipation (350mW maximum), and RF performance characteristics (noise figure and gain). Substitute parts must maintain NPN polarity and support the specified voltage and current ratings.

Two substitute parts are identified based on these electrical parameters:

MAX2602ESA+T maintains the 15V voltage rating and exceeds current and power specifications, making it suitable for direct electrical substitution in applications where surface-mount packaging is acceptable.

BFP193WH6327XTSA1 operates at 12V, which is below the 15V rating of the 2N5770. This part is included as a substitute only for applications where the lower voltage rating is compatible with circuit design requirements.

Parameter Comparison

Parameter	2N5770	MAX2602ESA+T	BFP193WH6327XTSA1
Manufacturer	onsemi	Analog Devices Inc./Maxim Integrated	Infineon Technologies
Transistor Type	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	15V	15V	12V
Current - Collector (Ic) (Max)	50mA	1.2A	80mA
Power - Max	350mW	6.4W	580mW
Noise Figure (Typ @ f)	6dB @ 60MHz	3.3dB @ 836MHz	1dB ~ 1.6dB @ 900MHz ~ 1.8GHz
Gain	15dB	11.6dB	13.5dB ~ 20.5dB
DC Current Gain (hFE) (Min)	50 @ 8mA, 10V	100 @ 250mA, 3V	70 @ 30mA, 8V
Operating Temperature (Max)	150°C	150°C	150°C
Mounting Type	Through Hole	Surface Mount	Surface Mount
Package / Case	TO-92-3	8-SOIC-EP	SOT-343
Product Status	Obsolete	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MAX2602ESA+T is the primary substitute for the 2N5770 in new designs. This part is active in production, ROHS3 compliant, and maintains the 15V voltage rating. The MAX2602ESA+T exceeds the current and power specifications of the 2N5770, providing design margin. The transition to surface-mount packaging (8-SOIC-EP) requires PCB layout modification but offers improved thermal performance through the exposed pad. This part is suitable for applications requiring direct voltage compatibility.

BFP193WH6327XTSA1 is an alternative substitute for applications where the 12V voltage rating is acceptable within circuit design constraints. This part is active in production and ROHS3 compliant. The BFP193WH6327XTSA1 operates at higher frequencies (8GHz transition frequency) and delivers superior noise performance compared to the 2N5770. Surface-mount packaging (SOT-343) requires PCB redesign. Selection of this part is appropriate only when circuit voltage requirements permit operation below 15V.

Both substitute parts carry REACH Unaffected and EAR99 ECCN classifications, matching the regulatory status of the 2N5770.

Frequently Asked Questions (FAQ)

Q: Can the MAX2602ESA+T directly replace the 2N5770 in existing through-hole designs?

A: Electrical substitution is valid; however, the MAX2602ESA+T uses surface-mount packaging (8-SOIC-EP) rather than through-hole (TO-92-3). PCB layout and assembly process modifications are required. The 15V voltage rating and superior current/power specifications ensure electrical compatibility.

Q: Is the BFP193WH6327XTSA1 suitable for all 2N5770 applications?

A: The BFP193WH6327XTSA1 operates at 12V maximum collector-emitter breakdown voltage, which is 3V below the 2N5770 rating. This part is suitable only for applications where circuit design permits operation at 12V or lower. Verify circuit voltage requirements before selection.

Q: What are the packaging implications of substituting the 2N5770?

A: The 2N5770 uses through-hole TO-92-3 packaging. Both substitute parts use surface-mount packages: MAX2602ESA+T uses 8-SOIC-EP, and BFP193WH6327XTSA1 uses SOT-343. Surface-mount substitution requires PCB redesign, modified assembly processes, and updated thermal management considerations.

Q: Are the substitute parts compliant with current regulatory requirements?

A: Both MAX2602ESA+T and BFP193WH6327XTSA1 are ROHS3 compliant and carry REACH Unaffected status. Both parts have MSL rating of 1 (Unlimited), matching the 2N5770 moisture sensitivity classification.

Q: How do the RF performance characteristics compare?

A: The MAX2602ESA+T delivers 3.3dB noise figure at 836MHz with 11.6dB gain. The BFP193WH6327XTSA1 delivers 1dB to 1.6dB noise figure at 900MHz to 1.8GHz with 13.5dB to 20.5dB gain. The 2N5770 operates at lower frequencies (60MHz) with 6dB noise figure and 15dB gain. Frequency-dependent performance must be evaluated against specific application requirements.

Q: What is the current availability status of these parts?

A: The 2N5770 is obsolete with 1932 pieces in stock. MAX2602ESA+T is active with 2963 pieces in stock. BFP193WH6327XTSA1 is active with 54065 pieces in stock. Active production status of substitute parts ensures long-term supply continuity.

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