BCP54-QX Equivalent & Substitute Parts

Part Overview

The BCP54-QX is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-223 package. This active product operates at a maximum collector current of 1 A, collector-emitter breakdown voltage of 45 V, and maximum power dissipation of 650 mW. The device is qualified to AEC-Q101 automotive standards and is RoHS3 compliant. Substitute parts are identified when electrical parameters, mechanical packaging, and compliance certifications align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max)	500	mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min	63	@ 150mA, 2V
Power - Max	650	mW
Frequency - Transition	180	MHz
Operating Temperature (TJ)	150	°C
Package / Case	TO-261-4, TO-261AA	—
Supplier Device Package	SOT-223	—
Mounting Type	Surface Mount	—
Grade	Automotive	—

Substitute Part Grouping Explanation

Substitute parts for the BCP54-QX are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

Transistor Type: NPN
Maximum Collector Current (Ic): 1 A
Collector-Emitter Breakdown Voltage: 45 V
Vce Saturation: 500 mV @ 50mA, 500mA
Collector Cutoff Current (ICBO): 100 nA
DC Current Gain (hFE): 63 minimum @ 150mA, 2V
Maximum Power Dissipation: 650 mW
Transition Frequency: 180 MHz
Maximum Operating Temperature: 150°C

Mechanical Parameters (Must Match):

Package Type: SOT-223
Mounting Type: Surface Mount
Case Code: TO-261-4, TO-261AA

Compliance Parameters:

RoHS3 Compliance
Automotive Grade Classification
Active Product Status

The BCP54-10,135 meets all specified electrical and mechanical parameters and maintains automotive-grade qualification, establishing it as a parametric equivalent substitute.

Parameter Comparison

Parameter	BCP54-QX	BCP54-10,135	Match
Transistor Type	NPN	NPN	✓
Current - Collector (Ic) Max	1 A	1 A	✓
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	✓
Vce Saturation (Max)	500 mV @ 50mA, 500mA	500 mV @ 50mA, 500mA	✓
Current - Collector Cutoff (Max)	100 nA	100 nA	✓
DC Current Gain (hFE) Min	63 @ 150mA, 2V	63 @ 150mA, 2V	✓
Power - Max	650 mW	650 mW	✓
Frequency - Transition	180 MHz	180 MHz	✓
Operating Temperature (TJ)	150°C	150°C	✓
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	✓
Supplier Device Package	SOT-223	SOT-223	✓
Mounting Type	Surface Mount	Surface Mount	✓
Grade	Automotive	Automotive	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

Both the BCP54-QX and BCP54-10,135 are active products manufactured by Nexperia USA Inc. and maintain identical electrical and mechanical specifications. The BCP54-10,135 carries AEC-Q100 qualification, while the BCP54-QX carries AEC-Q101 qualification. Both devices are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for automotive and industrial applications.

Selection between these parts should be based on supply chain availability and specific automotive qualification requirements. The BCP54-10,135 offers significantly higher inventory availability (27,451 pieces in stock versus 1,086 pieces for the BCP54-QX), making it suitable for high-volume production scenarios where AEC-Q100 qualification is acceptable. The BCP54-QX remains the primary choice when AEC-Q101 qualification is explicitly required by design specifications.

Frequently Asked Questions (FAQ)

Q: Can the BCP54-10,135 be used as a direct replacement for the BCP54-QX?

A: Yes. Both devices share identical electrical parameters (1 A collector current, 45 V breakdown voltage, 650 mW power dissipation, 180 MHz transition frequency), identical saturation characteristics, identical DC current gain specifications, and identical SOT-223 surface mount packaging. Both are automotive-grade, RoHS3 compliant, and active products.

Q: What is the difference between AEC-Q100 and AEC-Q101 qualifications?

A: AEC-Q100 and AEC-Q101 are distinct automotive qualification standards. The BCP54-10,135 carries AEC-Q100 qualification, while the BCP54-QX carries AEC-Q101 qualification. Selection depends on specific design requirements and customer qualification mandates.

Q: Are the package dimensions identical between BCP54-QX and BCP54-10,135?

A: Yes. Both devices use the SOT-223 package with TO-261-4 and TO-261AA case codes, ensuring identical footprint and mounting characteristics for PCB assembly.

Q: What is the moisture sensitivity level (MSL) for these devices?

A: The BCP54-10,135 specifies MSL 1 (Unlimited). The BCP54-QX does not provide MSL specification in the available data.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the BCP54-QX and BCP54-10,135 are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for European and international markets.

Q: Which part should be selected for new designs?

A: Selection is based on qualification requirements and supply availability. The BCP54-10,135 offers higher inventory levels and AEC-Q100 qualification. The BCP54-QX should be selected when AEC-Q101 qualification is specified in design documentation.

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