FCX1147ATA Equivalent & Substitute Parts

Part Overview

The FCX1147ATA is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-89-3 package. This component operates at a maximum collector current of 3 A with a collector-emitter breakdown voltage of 12 V and a maximum power dissipation of 2 W. The FCX1147ATA is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	3 A
Voltage - Collector Emitter Breakdown (Max)	12 V
Vce Saturation (Max) @ Ib, Ic	400mV @ 50mA, 5A
Current - Collector Cutoff (Max)	10nA
DC Current Gain (hFE) (Min) @ Ic, Vce	250 @ 500mA, 2V
Power - Max	2 W
Frequency - Transition	115MHz
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-243AA
Supplier Device Package	SOT-89-3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FCX1147ATA is determined by compatibility across the following critical parameters:

Mandatory Compatibility Criteria:

Transistor Type: PNP configuration
Mounting Type: Surface Mount
Package / Case: TO-243AA physical form factor
Operating Temperature Range: Minimum -55°C to 150°C (TJ)
RoHS3 Compliance and MSL Level 1 rating

Functional Compatibility Parameters:

Current - Collector (Ic) (Max): Equal to or greater than 3 A
Voltage - Collector Emitter Breakdown (Max): Equal to or greater than 12 V
Power - Max: Equal to or greater than 2 W
DC Current Gain (hFE): Minimum 250 @ specified conditions

Substitute parts are grouped into two categories based on voltage rating and current handling characteristics. Parts with voltage ratings equal to 12 V maintain direct functional equivalence. Parts with elevated voltage ratings (40 V) provide enhanced voltage margin while maintaining current and power specifications. All substitute parts maintain the required surface mount SOT-89-3 package configuration and compliance certifications.

Parameter Comparison

Parameter	FCX1147ATA	FCX1151ATA	2SB1697T100	PBSS301PX,115
Manufacturer	Diodes Incorporated	Diodes Incorporated	Rohm Semiconductor	Nexperia USA Inc.
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	3 A	3 A	2 A	5.3 A
Voltage - Collector Emitter Breakdown (Max)	12 V	40 V	12 V	12 V
Vce Saturation (Max) @ Ib, Ic	400mV @ 50mA, 5A	300mV @ 250mA, 3A	180mV @ 50mA, 1A	210mV @ 265mA, 5.3A
Current - Collector Cutoff (Max)	10nA	100nA	100µA (ICBO)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	250 @ 500mA, 2V	250 @ 500mA, 2V	270 @ 200mA, 2V	200 @ 2A, 2V
Power - Max	2 W	2 W	500 mW	2.1 W
Frequency - Transition	115MHz	145MHz	360MHz	140MHz
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	SOT-89-3	SOT-89-3	MPT3	SOT-89
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

FCX1151ATA (Diodes Incorporated)

The FCX1151ATA is an active product from the same manufacturer as the FCX1147ATA. This part maintains identical collector current (3 A) and power dissipation (2 W) specifications while providing an elevated collector-emitter breakdown voltage of 40 V. The FCX1151ATA is suitable for applications where the original 12 V rating is adequate but additional voltage margin is beneficial. This part is ROHS3 compliant with MSL Level 1 rating and is available in production quantities.

PBSS301PX,115 (Nexperia USA Inc.)

The PBSS301PX,115 is an active automotive-grade product qualified to AEC-Q100 standards. This part exceeds the collector current specification at 5.3 A while maintaining the 12 V collector-emitter breakdown voltage and 2.1 W power rating. The PBSS301PX,115 is suitable for applications requiring automotive qualification or enhanced current handling capacity. This part is ROHS3 compliant with MSL Level 1 rating.

2SB1697T100 (Rohm Semiconductor)

The 2SB1697T100 is an active product with identical 12 V collector-emitter breakdown voltage but reduced maximum collector current of 2 A and power dissipation of 500 mW. This part is suitable only for applications where the collector current requirement does not exceed 2 A. The 2SB1697T100 offers higher transition frequency (360MHz) and lower saturation voltage characteristics. This part is ROHS3 compliant with MSL Level 1 rating.

Frequently Asked Questions (FAQ)

Q: Can the FCX1151ATA directly replace the FCX1147ATA in all applications?

A: The FCX1151ATA maintains identical collector current (3 A) and power dissipation (2 W) specifications. The elevated collector-emitter breakdown voltage (40 V versus 12 V) does not create incompatibility in circuits designed for 12 V operation. Both parts share the same TO-243AA package and SOT-89-3 supplier device package configuration. Direct substitution is supported from an electrical and mechanical standpoint.

Q: What are the limitations of the 2SB1697T100 as a substitute?

A: The 2SB1697T100 has a maximum collector current of 2 A and maximum power dissipation of 500 mW, both lower than the FCX1147ATA specifications (3 A and 2 W respectively). This part is suitable only for applications where the actual operating collector current does not exceed 2 A and power dissipation remains below 500 mW. Applications requiring the full 3 A current capability cannot use this substitute.

Q: Is the PBSS301PX,115 suitable for non-automotive applications?

A: The PBSS301PX,115 is an automotive-grade part with AEC-Q100 qualification. Automotive-qualified components meet stringent reliability and quality standards that exceed general industrial requirements. This part is suitable for use in non-automotive applications. The automotive qualification does not restrict use in other application categories.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use the TO-243AA package case and surface mount configuration. The supplier device packages differ slightly: FCX1151ATA and PBSS301PX,115 use SOT-89-3, while 2SB1697T100 uses MPT3. These package designations refer to the same physical form factor with identical pin configuration and mounting footprint compatibility.

Q: What is the significance of the MSL Level 1 rating?

A: MSL (Moisture Sensitivity Level) Level 1 indicates unlimited shelf life without moisture control requirements. All substitute parts carry MSL Level 1 rating, identical to the FCX1147ATA. This eliminates moisture-related handling and storage constraints for component procurement and assembly operations.

Q: How do the DC current gain specifications compare across substitute parts?

A: The FCX1147ATA specifies minimum hFE of 250 @ 500mA, 2V. The FCX1151ATA maintains this specification exactly. The 2SB1697T100 specifies minimum hFE of 270 @ 200mA, 2V, providing higher gain at lower current. The PBSS301PX,115 specifies minimum hFE of 200 @ 2A, 2V, providing lower gain at higher current. Selection depends on the specific bias point requirements of the application circuit.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed carry ROHS3 compliance certification, identical to the FCX1147ATA. This ensures compatibility with regulatory requirements for restricted substance elimination in electronic components.

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