BC55-10PASX Equivalent & Substitute Parts

Part Overview

The BC55-10PASX is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in automotive-grade circuits. This transistor operates at a maximum collector current of 1 A, collector-emitter breakdown voltage of 60 V, and maximum power dissipation of 420 mW. The device is packaged in a 3-UDFN Exposed Pad (DFN2020D-3) configuration and is qualified to AEC-Q100 automotive standards with ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the same package type and functional specifications. The BC55-10PASX has direct parametric equivalents within the BC55 series that share identical electrical ratings and packaging requirements.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the BC55-10PASX is determined by equivalence across the following critical parameters:

Electrical Performance Criteria:

Collector current rating: 1 A maximum
Collector-emitter breakdown voltage: 60 V maximum
Vce saturation: 500 mV @ 50 mA, 500 mA
DC current gain (hFE): 63 minimum @ 150 mA, 2 V
Transition frequency: 180 MHz
Maximum power dissipation: 420 mW
Collector cutoff current: 100 nA maximum

Mechanical & Packaging Criteria:

Package type: 3-UDFN Exposed Pad (DFN2020D-3)
Mounting type: Surface Mount
Moisture sensitivity level: 1 (Unlimited)

Compliance & Qualification Criteria:

Automotive grade classification
RoHS3 compliance
REACH unaffected status

All substitute parts listed maintain identical electrical specifications and package configuration. Differences in qualification standards (AEC-Q100 versus AEC-Q101) and inventory availability are noted but do not affect functional substitutability.

Parameter Comparison

Parameter	BC55-10PASX	BC55-10PAS-QX	BC55-16PASX	BC55PA,115	BC55PASX
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Transistor Type	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) Max	1 A	1 A	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	60 V	60 V	60 V	60 V	60 V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 50 mA, 500 mA	500 mV @ 50 mA, 500 mA	500 mV @ 50 mA, 500 mA	500 mV @ 50 mA, 500 mA	500 mV @ 50 mA, 500 mA
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA	100 nA	100 nA
DC Current Gain (hFE) Min @ Ic, Vce	63 @ 150 mA, 2 V	63 @ 150 mA, 2 V	63 @ 150 mA, 2 V	63 @ 150 mA, 2 V	63 @ 150 mA, 2 V
Power - Max	420 mW	420 mW	420 mW	420 mW	420 mW
Frequency - Transition	180 MHz	180 MHz	180 MHz	180 MHz	180 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C
Package / Case	3-UDFN Exposed Pad	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	DFN2020D-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q100	AEC-Q101	AEC-Q100	AEC-Q100	AEC-Q100
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical equivalence to the BC55-10PASX. Selection among these alternatives is based on the following factors:

Qualification Standard Consideration: The BC55-10PAS-QX carries AEC-Q101 qualification, while BC55-10PASX, BC55-16PASX, BC55PA,115, and BC55PASX carry AEC-Q100 qualification. Both standards are automotive-grade certifications; the choice depends on specific application requirements and qualification documentation mandated by the end-use system.

Inventory Availability: BC55PASX offers the highest inventory level at 26,990 pieces, followed by BC55-16PASX at 6,532 pieces, BC55-10PAS-QX at 3,924 pieces, and BC55PA,115 at 3,940 pieces. The main part BC55-10PASX maintains 829 pieces in stock.

Compliance Status: All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Packaging & Mounting: All substitute parts utilize identical DFN2020D-3 surface mount packaging, ensuring direct mechanical compatibility in existing PCB layouts without redesign.

Frequently Asked Questions (FAQ)

Q: Can BC55-10PAS-QX replace BC55-10PASX in automotive applications?

A: Yes. BC55-10PAS-QX maintains identical electrical specifications and package configuration. The difference in qualification standard (AEC-Q101 versus AEC-Q100) does not affect functional substitutability. Confirm that your application's qualification documentation accepts AEC-Q101 certification.

Q: Are all substitute parts pin-compatible with BC55-10PASX?

A: Yes. All substitute parts use the 3-UDFN Exposed Pad (DFN2020D-3) package with identical pinout and footprint. Direct PCB substitution is supported without layout modification.

Q: What is the difference between BC55-16PASX and BC55-10PASX?

A: Both parts share identical electrical ratings and package specifications. The designation difference (16 versus 10) reflects internal Nexperia part numbering but does not indicate functional differences in the parameters provided. Both are AEC-Q100 qualified.

Q: Can I use BC55PASX as a drop-in replacement?

A: Yes. BC55PASX is electrically and mechanically equivalent to BC55-10PASX. Both are AEC-Q100 qualified automotive-grade transistors in DFN2020D-3 packaging with identical electrical performance specifications.

Q: Does moisture sensitivity affect storage or handling of these parts?

A: No. All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard component storage practices apply.

Q: Are there any compliance differences between the substitute parts?

A: All parts are ROHS3 compliant and REACH unaffected. BC55-10PAS-QX carries AEC-Q101 qualification while the others carry AEC-Q100. Both are valid automotive standards; application requirements determine which is appropriate.

Q: Can these parts be used interchangeably in the same circuit design?

A: Yes. All substitute parts maintain identical electrical performance across collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and transition frequency. Circuit performance is not affected by substitution.

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