FCX495TC Equivalent & Substitute Parts

Part Overview

The FCX495TC is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for general-purpose switching and amplification applications. This Surface Mount device operates at 150V collector-emitter breakdown voltage with a maximum collector current of 1A and 1W power dissipation capability. The FCX495TC is classified as an Active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity for applications requiring NPN transistor functionality within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	150	V
Current - Collector (Ic) (Max)	1	A
Power - Max	1	W
Frequency - Transition	100	MHz
DC Current Gain (hFE) (Min)	100	@ 1mA, 10V
Operating Temperature Range	-65 to 150	°C
Package / Case	TO-243AA (SOT-89-3)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the FCX495TC are classified into two categories based on electrical parameter alignment:

Parametric Equivalent (Direct Substitution): The FCX495TA maintains identical electrical specifications across all critical parameters including 150V breakdown voltage, 1A maximum collector current, 1W power rating, 100MHz transition frequency, and DC current gain of 100 minimum. The only difference is packaging format (Cut Tape versus Tape & Reel). This part is a direct functional equivalent suitable for direct circuit substitution.

Manufacturer Recommended Alternatives (Conditional Substitution): The 2SC3648S-TD-E and 2SC3648T-TD-E are onsemi-manufactured NPN transistors with modified electrical specifications. These parts feature 160V collector-emitter breakdown voltage (10V higher than FCX495TC), reduced maximum collector current of 700mA (300mA lower than FCX495TC), and reduced power dissipation of 500mW (50% of FCX495TC rating). These parts are suitable for applications where the reduced current and power ratings are acceptable and the higher voltage rating provides additional design margin.

Substitution eligibility is determined by the following key parameters:

Transistor Type (NPN)
Voltage - Collector Emitter Breakdown (Max)
Current - Collector (Ic) (Max)
Power - Max
Frequency - Transition
DC Current Gain (hFE) (Min)
Package / Case (TO-243AA)
Mounting Type (Surface Mount)

Parameter Comparison

Parameter	FCX495TC	FCX495TA	2SC3648S-TD-E	2SC3648T-TD-E
Manufacturer	Diodes Incorporated	Diodes Incorporated	onsemi	onsemi
Transistor Type	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	150 V	150 V	160 V	160 V
Current - Collector (Ic) (Max)	1 A	1 A	700 mA	700 mA
Power - Max	1 W	1 W	500 mW	500 mW
Frequency - Transition	100 MHz	100 MHz	120 MHz	120 MHz
DC Current Gain (hFE) (Min)	100 @ 1mA, 10V	100 @ 1mA, 10V	100 @ 100mA, 5V	100 @ 100mA, 5V
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA	100 nA
Operating Temperature Range	-65 to 150 °C	-65 to 150 °C	150 °C (TJ)	150 °C (TJ)
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

FCX495TA (Diodes Incorporated): This part is the direct parametric equivalent to the FCX495TC with identical electrical specifications. Selection of FCX495TA is appropriate when tape and reel packaging is not required or when cut tape format is preferred for manufacturing processes. Both parts maintain Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. Inventory availability is significantly higher for FCX495TA (47,150 pieces) compared to FCX495TC (772 pieces), supporting supply chain continuity.

2SC3648S-TD-E and 2SC3648T-TD-E (onsemi): These parts are suitable for applications where the reduced maximum collector current (700mA versus 1A) and reduced power dissipation (500mW versus 1W) are compatible with circuit requirements. The higher collector-emitter breakdown voltage (160V versus 150V) provides additional voltage margin. The higher transition frequency (120MHz versus 100MHz) supports higher-speed switching applications. Both parts maintain Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. Selection between 2SC3648S-TD-E and 2SC3648T-TD-E is based on packaging format preference (both available in Cut Tape & Digi-Reel format).

All substitute parts are compliant with RoHS3 requirements and REACH regulations, with identical ECCN classification (EAR99) to the main part.

Frequently Asked Questions (FAQ)

Q: Can FCX495TA be used as a direct replacement for FCX495TC?

A: Yes. The FCX495TA is a parametric equivalent with identical electrical specifications including 150V breakdown voltage, 1A maximum collector current, 1W power rating, 100MHz transition frequency, and DC current gain of 100 minimum. The only difference is packaging format (Cut Tape versus Tape & Reel). Both parts are manufactured by Diodes Incorporated and maintain identical compliance certifications.

Q: What are the limitations when substituting 2SC3648S-TD-E or 2SC3648T-TD-E for FCX495TC?

A: The 2SC3648 series has reduced maximum collector current (700mA versus 1A) and reduced power dissipation (500mW versus 1W). These parts are suitable only for applications where circuit current requirements do not exceed 700mA and power dissipation does not exceed 500mW. The higher collector-emitter breakdown voltage (160V) and transition frequency (120MHz) are not limitations but provide additional design margin.

Q: Are all substitute parts available in the same package?

A: Yes. All parts listed (FCX495TC, FCX495TA, 2SC3648S-TD-E, and 2SC3648T-TD-E) use the TO-243AA package in SOT-89-3 or PCP supplier device format. All are Surface Mount devices with identical footprint compatibility.

Q: What is the difference between FCX495TC and FCX495TA packaging?

A: FCX495TC is supplied in Tape & Reel (TR) format, while FCX495TA is supplied in Cut Tape (CT) format. Both formats contain identical components with identical electrical specifications. Selection depends on manufacturing process requirements and inventory management preferences.

Q: Are the onsemi 2SC3648 parts recommended as primary substitutes?

A: The 2SC3648S-TD-E and 2SC3648T-TD-E are classified as manufacturer-recommended alternatives rather than primary substitutes. These parts are suitable when the reduced current and power ratings align with application requirements. For applications requiring full 1A current capability and 1W power dissipation, the FCX495TA is the appropriate substitute.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All parts (FCX495TC, FCX495TA, 2SC3648S-TD-E, and 2SC3648T-TD-E) are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry unlimited moisture sensitivity rating (MSL 1). All parts maintain Active product status.

Q: What is the operating temperature range for substitute parts?

A: FCX495TC and FCX495TA operate across -65°C to 150°C junction temperature. The 2SC3648S-TD-E and 2SC3648T-TD-E specify 150°C maximum junction temperature. Verify specific application temperature requirements when selecting between these options.

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