BC55PA,115 Equivalent & Substitute Parts

Part Overview

The BC55PA,115 is an NPN bipolar junction transistor (BJT) manufactured by Nexperia USA Inc., designed for surface mount applications in automotive-grade circuits. This transistor operates at 60 V collector-emitter breakdown voltage with a maximum collector current of 1 A and delivers 420 mW power dissipation. The device is packaged in a 3-UDFN Exposed Pad (DFN2020D-3) configuration and is qualified to AEC-Q100 automotive standards. The BC55PA,115 maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to address inventory availability, supply chain continuity, or specific qualification requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	1	A
Collector-Emitter Breakdown Voltage (Max)	60	V
Vce Saturation (Max)	500	mV @ 50mA, 500mA
Collector Cutoff Current (ICBO)	100	nA
DC Current Gain (hFE) Minimum	63	@ 150mA, 2V
Power Dissipation Maximum	420	mW
Transition Frequency	180	MHz
Operating Temperature Maximum	150	°C (TJ)
Package Type	3-UDFN Exposed Pad	DFN2020D-3
Mounting Type	Surface Mount	—
Grade	Automotive	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC55PA,115 is determined by strict equivalence across all electrical and mechanical parameters. The substitute parts BC55-10PAS-QX, BC55-16PASX, and BC55PASX are classified as parametric equivalents because they maintain identical specifications for collector current, breakdown voltage, saturation voltage, cutoff current, DC current gain, power dissipation, transition frequency, operating temperature, and package configuration.

The key parameters that govern substitution eligibility are:

Transistor Type: NPN
Collector Current (Ic) Maximum: 1 A
Collector-Emitter Breakdown Voltage: 60 V
Vce Saturation: 500 mV @ 50mA, 500mA
DC Current Gain (hFE): 63 minimum @ 150mA, 2V
Power Dissipation: 420 mW
Transition Frequency: 180 MHz
Operating Temperature: 150°C (TJ)
Package: 3-UDFN Exposed Pad (DFN2020D-3)
Mounting Type: Surface Mount
Grade: Automotive
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts match these parameters without deviation. Differences in qualification standards (AEC-Q100 versus AEC-Q101) and HTSUS codes reflect manufacturing lot tracking and regulatory classification but do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	BC55PA,115	BC55-10PAS-QX	BC55-16PASX	BC55PASX
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Category	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)
Transistor Type	NPN	NPN	NPN	NPN
Ic (Max)	1 A	1 A	1 A	1 A
Vce Breakdown (Max)	60 V	60 V	60 V	60 V
Vce Saturation (Max)	500 mV @ 50mA, 500mA	500 mV @ 50mA, 500mA	500 mV @ 50mA, 500mA	500 mV @ 50mA, 500mA
ICBO (Max)	100 nA	100 nA	100 nA	100 nA
hFE (Min)	63 @ 150mA, 2V	63 @ 150mA, 2V	63 @ 150mA, 2V	63 @ 150mA, 2V
Power (Max)	420 mW	420 mW	420 mW	420 mW
Frequency - Transition	180 MHz	180 MHz	180 MHz	180 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C
Grade	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q100	AEC-Q101	AEC-Q100	AEC-Q100
Package / Case	3-UDFN Exposed Pad	3-UDFN Exposed Pad	3-UDFN Exposed Pad	3-UDFN Exposed Pad
Supplier Device Package	DFN2020D-3	DFN2020D-3	DFN2020D-3	DFN2020D-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—BC55-10PAS-QX, BC55-16PASX, and BC55PASX—are direct parametric equivalents to the BC55PA,115 and are suitable for interchangeable use in circuit designs. Selection among these parts is based on availability, supply chain considerations, and specific qualification requirements.

BC55-10PAS-QX carries AEC-Q101 qualification, which represents a higher automotive qualification standard compared to the AEC-Q100 qualification of the primary part. This part is appropriate for applications requiring enhanced reliability assurance in automotive environments.

BC55-16PASX and BC55PASX both maintain AEC-Q100 qualification, matching the primary part specification. BC55PASX offers the highest inventory availability (26,990 pieces) among all options, making it the preferred choice for high-volume production or immediate procurement needs. BC55-16PASX provides an intermediate inventory position (6,532 pieces).

All parts are ROHS3 compliant, REACH unaffected, and maintain Active product status. The DFN2020D-3 package configuration is identical across all parts, ensuring mechanical compatibility with existing PCB layouts and assembly processes. No design modifications or re-qualification are required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can BC55-10PAS-QX be used as a direct replacement for BC55PA,115?

A: Yes. BC55-10PAS-QX is a parametric equivalent with identical electrical specifications (1 A collector current, 60 V breakdown voltage, 420 mW power dissipation, 180 MHz transition frequency) and identical package configuration (DFN2020D-3). The AEC-Q101 qualification of BC55-10PAS-QX exceeds the AEC-Q100 requirement of BC55PA,115, making it suitable for direct substitution.

Q: What is the difference between BC55-16PASX and BC55PASX?

A: BC55-16PASX and BC55PASX are electrically and mechanically identical. Both carry AEC-Q100 qualification and are packaged in DFN2020D-3. The primary difference is inventory availability: BC55PASX has 26,990 pieces in stock compared to 6,532 pieces for BC55-16PASX. Selection between these parts is based on supply chain and procurement timing.

Q: Are all substitute parts suitable for automotive applications?

A: Yes. All substitute parts carry Automotive grade classification and are qualified to either AEC-Q100 or AEC-Q101 standards. All are ROHS3 compliant and REACH unaffected, meeting automotive regulatory requirements.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All parts use the identical DFN2020D-3 package with 3-UDFN Exposed Pad configuration. No PCB layout modifications, footprint changes, or assembly process adjustments are required when substituting between BC55PA,115, BC55-10PAS-QX, BC55-16PASX, and BC55PASX.

Q: What parameters must remain constant for substitution to be valid?

A: Substitution validity is determined by equivalence in collector current (1 A), collector-emitter breakdown voltage (60 V), saturation voltage (500 mV @ 50mA, 500mA), DC current gain (63 minimum @ 150mA, 2V), power dissipation (420 mW), transition frequency (180 MHz), operating temperature (150°C TJ), and package type (DFN2020D-3). All substitute parts maintain these parameters without deviation.

Q: Is moisture sensitivity a concern when substituting these parts?

A: No. All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply uniformly across all parts.

Q: Which substitute part should be selected for new designs?

A: BC55PASX is recommended for new designs due to highest inventory availability and active product status. BC55-10PAS-QX is appropriate if enhanced AEC-Q101 qualification is required. All parts are suitable for production use without design modifications.

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