2SC501900L RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The 2SC501900L is an RF transistor NPN manufactured by Panasonic Electronic Components, designed for RF applications operating at 6GHz with a maximum power rating of 1W. This device features a 10V collector-emitter breakdown voltage and is housed in a MiniP3-F1 surface mount package. The product is currently obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	-
Voltage - Collector Emitter Breakdown (Max)	10V	V
Frequency - Transition	6GHz	GHz
Power - Max	1W	W
Current - Collector (Ic) (Max)	80mA	mA
Noise Figure (Typ @ f)	1.7dB @ 800MHz	dB
Gain	7.5dB ~ 10dB	dB
DC Current Gain (hFE) (Min)	80 @ 20mA, 8V	-
Operating Temperature (Max)	150°C	°C
Mounting Type	Surface Mount	-
Package / Case	TO-243AA (MiniP3-F1)	-
RoHS Status	RoHS non-compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the 2SC501900L is determined by alignment across the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN configuration required
Voltage - Collector Emitter Breakdown: Minimum 10V to maintain voltage headroom
Frequency - Transition: Minimum 6GHz to support RF operating frequency
Power - Max: Minimum 1W to handle power dissipation requirements
Current - Collector (Ic) (Max): Minimum 80mA to support collector current demands
Mounting Type: Surface Mount required for PCB integration
Operating Temperature: 150°C maximum junction temperature

The substitute parts are grouped into two categories based on their electrical characteristics relative to the main part:

Category A - Direct RF Equivalents (6GHz to 16GHz): Parts with transition frequencies at or above 6GHz and voltage ratings at or above 10V, suitable for direct replacement in RF applications with comparable power handling.

Category B - Extended Performance Alternatives (25GHz and above): Parts with significantly higher transition frequencies and lower voltage ratings, applicable where higher frequency capability is required but voltage constraints differ.

Category C - Lower Frequency Alternatives (650MHz to 2GHz): Parts with reduced frequency capability but higher voltage ratings or different power characteristics, applicable only where frequency requirements are relaxed.

Category D - High Power Alternatives (350W): Chassis mount device with significantly different electrical and mechanical characteristics, applicable only for high-power discrete RF amplifier stages.

Parameter Comparison

Parameter	2SC501900L	2SC5488A-TL-H	BFP405FH6327XTSA1	BFP720ESDH6327XTSA1	BFR340L3E6327XTMA1	MCH4020-TL-H	MMBT5179	MMBTH10-7-F	PH1090-350L
Manufacturer	Panasonic	onsemi	Infineon	Infineon	Infineon	onsemi	onsemi	Diodes Inc.	MACOM
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	10V	10V	4.5V	4.7V	9V	8V	12V	25V	80V
Frequency - Transition	6GHz	7GHz	25GHz	43GHz	14GHz	16GHz	2GHz	650MHz	-
Power - Max	1W	100mW	75mW	100mW	60mW	400mW	225mW	300mW	350W
Current - Collector (Ic) (Max)	80mA	70mA	25mA	30mA	10mA	150mA	50mA	50mA	17A
Noise Figure (Typ @ f)	1.7dB @ 800MHz	1dB @ 1GHz	1.25dB @ 1.8GHz	0.55dB ~ 1.55dB @ 150MHz ~ 10GHz	1.15dB @ 1.8GHz	1.2dB @ 1GHz	5dB @ 200MHz	-	-
Gain	7.5dB ~ 10dB	12dB	22.5dB	11dB ~ 30.5dB	17.5dB	17.5dB @ 1GHz	15dB	-	8.32dB
DC Current Gain (hFE) (Min)	80 @ 20mA, 8V	90 @ 20mA, 5V	60 @ 5mA, 4V	160 @ 15mA, 3V	90 @ 5mA, 3V	60 @ 50mA, 5V	25 @ 3mA, 1V	60 @ 4mA, 10V	-
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C	150°C	150°C	150°C	200°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Chassis Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

2SC5488A-TL-H (onsemi)

This part provides the closest electrical alignment to the 2SC501900L. It maintains the 10V voltage rating, exceeds the 6GHz frequency requirement at 7GHz, and delivers comparable power handling at 100mW. The part is in active production status with ROHS3 compliance and REACH unaffected certification. The 3-SSFP package differs from the original MiniP3-F1, requiring PCB layout verification. This substitute is suitable for direct replacement in RF applications where the 6GHz to 7GHz frequency range is acceptable.

MCH4020-TL-H (onsemi)

This part offers enhanced performance with 16GHz transition frequency and 400mW power rating, exceeding the original specifications. The 8V voltage rating is slightly reduced from 10V but remains within acceptable margins for most RF applications. Active production status with ROHS3 compliance and REACH unaffected certification. The 4-MCPH package (SOT-343F) differs from the original, requiring PCB layout verification. This substitute is suitable where higher frequency capability and increased power handling are beneficial.

BFR340L3E6327XTMA1 (Infineon)

This part provides 14GHz transition frequency with 9V voltage rating, meeting the frequency requirement with minimal voltage reduction. Power rating of 60mW is lower than the original 1W specification. Active production status with ROHS3 compliance and REACH unaffected certification. The PG-TSLP-3-1 package (SOT-883) represents a significant size reduction from the original MiniP3-F1. This substitute is suitable for applications where reduced power dissipation is acceptable and compact packaging is advantageous.

BFP720ESDH6327XTSA1 (Infineon)

This part delivers the highest frequency capability at 43GHz with 100mW power rating. The 4.7V voltage rating represents a significant reduction from the 10V specification and may not be suitable for all applications. Active production status with ROHS3 compliance and REACH unaffected certification. The PG-SOT343-4-2 package differs from the original. This substitute is applicable only where higher frequency operation is required and voltage constraints can be accommodated.

BFP405FH6327XTSA1 (Infineon)

This part operates at 25GHz with 75mW power rating. The 4.5V voltage rating is substantially lower than the 10V requirement and represents a significant design constraint. Active production status with ROHS3 compliance and REACH unaffected certification. The 4-TSFP package differs from the original. This substitute is applicable only for high-frequency applications where voltage limitations are acceptable.

MMBT5179 (onsemi)

This part operates at 2GHz, below the 6GHz requirement of the original device. The 12V voltage rating exceeds the original specification. Power rating of 225mW is lower than the original 1W. Active production status with ROHS3 compliance and REACH unaffected certification. Operating temperature range extends to -55°C. The SOT-23-3 package is a standard small-outline surface mount option. This substitute is applicable only where frequency requirements are relaxed below 2GHz.

MMBTH10-7-F (Diodes Incorporated)

This part operates at 650MHz, significantly below the 6GHz requirement. The 25V voltage rating substantially exceeds the original specification. Power rating of 300mW is lower than the original 1W. Active production status with ROHS3 compliance and REACH unaffected certification. Operating temperature range extends to -55°C. The SOT-23-3 package is a standard small-outline surface mount option. This substitute is applicable only for low-frequency applications where voltage headroom is required.

PH1090-350L (MACOM)

This part is a high-power chassis mount device with 80V voltage rating and 350W power capability, representing a fundamentally different application class. Transition frequency is not specified. The 17A collector current rating and 200°C maximum junction temperature indicate suitability for discrete RF power amplifier stages. Active production status with ROHS3 compliance. This substitute is not applicable for direct replacement in the original application and is suitable only for high-power RF amplifier designs requiring chassis mounting.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5488A-TL-H directly replace the 2SC501900L without circuit modifications?

A: The 2SC5488A-TL-H maintains electrical compatibility across voltage (10V), frequency (7GHz vs. 6GHz), and current (70mA vs. 80mA) specifications. However, the package change from MiniP3-F1 to 3-SSFP requires PCB layout verification. Pin configuration and thermal characteristics must be evaluated before implementation.

Q: Why do some substitute parts have lower voltage ratings than the original 2SC501900L?

A: Parts such as BFP405FH6327XTSA1 and BFP720ESDH6327XTSA1 are optimized for higher frequency operation (25GHz and 43GHz respectively). Lower voltage ratings are inherent to the semiconductor design required for these frequency ranges. These parts are suitable only for applications where the lower voltage rating does not compromise circuit performance.

Q: Is the PH1090-350L suitable as a substitute for the 2SC501900L?

A: No. The PH1090-350L is a high-power chassis mount device designed for discrete RF power amplifier stages. It operates in a fundamentally different application class with 350W power rating and 17A collector current. It is not applicable for direct replacement in the original 2SC501900L application.

Q: What is the significance of the package differences between substitute parts?

A: Package differences directly impact PCB layout, thermal management, and mechanical integration. The original MiniP3-F1 package differs from substitute packages such as 3-SSFP, 4-TSFP, SOT-343, SOT-883, and SOT-23-3. Each package change requires verification of pin assignments, lead spacing, thermal vias, and component placement before implementation.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original 2SC501900L is RoHS non-compliant. If RoHS compliance is a design requirement, any substitute part selection automatically satisfies this requirement.

Q: Which substitute part provides the best frequency performance?

A: The BFP720ESDH6327XTSA1 provides the highest transition frequency at 43GHz. However, this part has a 4.7V voltage rating, substantially lower than the original 10V specification. Selection must balance frequency capability against voltage constraints specific to the application.

Q: Can MMBT5179 or MMBTH10-7-F be used in place of the 2SC501900L?

A: These parts operate at 2GHz and 650MHz respectively, both significantly below the 6GHz requirement of the original device. They are suitable only for applications where frequency requirements are substantially relaxed. Direct substitution in RF applications operating at 6GHz is not appropriate.

Q: What is the impact of power rating differences on substitute part selection?

A: The original 2SC501900L has a 1W power rating. Substitute parts range from 60mW to 400mW (excluding the high-power PH1090-350L at 350W). Lower power ratings require verification that circuit power dissipation does not exceed the substitute part's capability. Higher power ratings provide additional thermal margin but do not affect electrical functionality.

Q: How should DC current gain (hFE) differences be evaluated?

A: The original 2SC501900L specifies hFE of 80 at 20mA and 8V. Substitute parts show varying hFE values at different bias points. Circuit designs using current-mode biasing are less sensitive to hFE variations than voltage-mode designs. Bias network recalculation may be required for substitute parts with significantly different hFE characteristics.

Q: Are there any REACH compliance considerations for substitute part selection?

A: All substitute parts except PH1090-350L explicitly state REACH Unaffected status. The PH1090-350L does not specify REACH status. For applications requiring REACH compliance documentation, substitute parts with explicit REACH Unaffected certification are preferred.

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