BCX55,135 Equivalent & Substitute Parts

Part Overview

The BCX55,135 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount device operates at a maximum collector-emitter voltage of 60 V with a collector current rating of 1 A and a transition frequency of 100 MHz. The part is classified as Active product status and carries AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications. Substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and compliance certifications to ensure functional equivalence in circuit designs.

Key Parameters

Parameter	BCX55,135
Manufacturer	Nexperia USA Inc.
Transistor Type	NPN
Collector Current (Ic) Max	1 A
Collector-Emitter Breakdown Voltage (Max)	60 V
Vce Saturation (Max)	500 mV @ 50 mA, 500 mA
Collector Cutoff Current (ICBO)	100 nA
DC Current Gain (hFE) Min	100 @ 150 mA, 2 V
Transition Frequency	100 MHz
Operating Temperature	150°C (TJ)
Package / Case	TO-243AA (SOT-89)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitute parts for the BCX55,135 are selected based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Transistor Type: NPN configuration
Collector Current Rating: 1 A maximum
Collector-Emitter Breakdown Voltage: 60 V or higher
Vce Saturation: 500 mV @ 50 mA, 500 mA
Collector Cutoff Current: 100 nA
Package / Case: TO-243AA (SOT-89 or SOT-89-3)
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Factors:

DC Current Gain (hFE): Minimum 100 @ 150 mA, 2 V or equivalent test conditions
Transition Frequency: 100 MHz or higher
Operating Temperature Range: Support for 150°C junction temperature
Product Status: Active

Substitute parts BCX5410TA, BCX5416TA, BCX54TA, BCX5516TA, and FCX491TA meet these criteria with compatible electrical specifications and identical package configurations. All substitute parts maintain ROHS3 compliance and surface mount SOT-89 packaging.

Parameter Comparison

Parameter	BCX55,135	BCX5410TA	BCX5416TA	BCX54TA	BCX5516TA	FCX491TA
Manufacturer	Nexperia USA Inc.	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Collector Current (Ic) Max	1 A	1 A	1 A	1 A	1 A	1 A
Collector-Emitter Breakdown Voltage (Max)	60 V	45 V	45 V	45 V	60 V	60 V
Vce Saturation (Max)	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	500 mV @ 100 mA, 1 A
Collector Cutoff Current (ICBO)	100 nA	100 nA	100 nA	100 nA	100 nA	100 nA
DC Current Gain (hFE) Min	100 @ 150 mA, 2 V	63 @ 150 mA, 2 V	100 @ 150 mA, 2 V	40 @ 150 mA, 2 V	100 @ 150 mA, 2 V	100 @ 500 mA, 5 V
Transition Frequency	100 MHz	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz
Operating Temperature	150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Package / Case	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA	TO-243AA
Supplier Device Package	SOT-89	SOT-89-3	SOT-89-3	SOT-89-3	SOT-89-3	SOT-89-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. The BCX5516TA and FCX491TA are direct electrical equivalents to the BCX55,135, matching the 60 V collector-emitter breakdown voltage specification and 100 mA minimum DC current gain at the specified test conditions. These parts are preferred for applications requiring identical voltage ratings.

The BCX5410TA, BCX5416TA, and BCX54TA operate at reduced collector-emitter breakdown voltages of 45 V, making them suitable for circuits where the 60 V rating is not required. The BCX5416TA provides the closest electrical match with 100 mA minimum DC current gain, while BCX5410TA and BCX54TA offer lower gain specifications at 63 mA and 40 mA respectively.

All substitute parts feature enhanced transition frequencies of 150 MHz compared to the BCX55,135 at 100 MHz, providing improved high-frequency performance. All parts are packaged in TO-243AA surface mount configurations with identical pin assignments, ensuring direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can BCX5516TA be used as a direct replacement for BCX55,135?

A: Yes. The BCX5516TA matches the BCX55,135 in collector current rating (1 A), collector-emitter breakdown voltage (60 V), Vce saturation characteristics (500 mV @ 50 mA, 500 mA), DC current gain minimum (100 @ 150 mA, 2 V), and package configuration (TO-243AA SOT-89-3). Both parts are Active status and ROHS3 compliant.

Q: What is the difference between BCX5410TA and BCX5516TA?

A: The primary difference is the collector-emitter breakdown voltage rating. BCX5410TA is rated for 45 V maximum, while BCX5516TA is rated for 60 V maximum. Both share identical collector current (1 A), Vce saturation (500 mV @ 50 mA, 500 mA), and DC current gain minimum (100 @ 150 mA, 2 V) specifications. BCX5516TA is suitable for applications requiring the full 60 V rating.

Q: Are the SOT-89 and SOT-89-3 packages pin-compatible?

A: Both SOT-89 and SOT-89-3 designations refer to the TO-243AA package with identical pin configurations and PCB footprints. The parts are mechanically and electrically interchangeable on the same circuit board layout.

Q: Why does FCX491TA have different Vce saturation test conditions?

A: FCX491TA specifies Vce saturation at 500 mV @ 100 mA, 1 A, compared to the BCX55,135 specification of 500 mV @ 50 mA, 500 mA. Both parts meet the 500 mV saturation voltage limit at their respective test conditions. The different test points reflect manufacturer characterization methods but do not affect functional equivalence in typical switching applications.

Q: Can BCX54TA be used in place of BCX55,135?

A: BCX54TA is electrically compatible for applications where the 45 V collector-emitter breakdown voltage is sufficient. However, BCX54TA has a lower DC current gain minimum of 40 @ 150 mA, 2 V compared to BCX55,135 at 100 @ 150 mA, 2 V. This reduced gain may affect circuit biasing and should be evaluated for specific application requirements.

Q: What is the operating temperature range difference?

A: The BCX55,135 specifies a maximum junction temperature of 150°C. All substitute parts specify an operating temperature range of -65°C to 150°C, providing extended low-temperature operation capability. This difference does not affect substitution in applications operating within the BCX55,135 temperature specification.

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

A: BCX5410TA, BCX5416TA, BCX54TA, and BCX5516TA are available in Tape & Reel (TR) packaging. BCX5416TA is also available in Cut Tape (CT) & Digi-Reel® packaging. FCX491TA is available in Tape & Reel (TR) packaging. All parts use identical TO-243AA surface mount packages.

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