BCX55-16-TP Equivalent & Substitute Parts

Part Overview

The BCX55-16-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This surface mount device operates at a maximum collector current of 1 A and collector-emitter breakdown voltage of 60 V, with a maximum power dissipation of 500 mW. The part is currently active in production and available in bulk packaging. Substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the SOT-89 package family, enabling direct replacement in circuit designs where performance parameters align.

Key Parameters

Parameter	BCX55-16-TP
Transistor Type	NPN
Current - Collector (Ic) (Max)	1 A
Voltage - Collector Emitter Breakdown (Max)	60 V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 150mA, 2V
Power - Max	500 mW
Frequency - Transition	130MHz
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-243AA
Supplier Device Package	SOT-89
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the BCX55-16-TP are qualified based on the following critical parameters that determine functional equivalence:

Mandatory Matching Criteria:

Transistor Type: NPN configuration
Current - Collector (Ic) (Max): 1 A minimum
Voltage - Collector Emitter Breakdown (Max): 60 V or greater
Vce Saturation: 500mV @ 50mA, 500mA
Current - Collector Cutoff (Max): 100nA (ICBO)
Mounting Type: Surface Mount
Package / Case: TO-243AA (SOT-89 family)

Allowable Variation Parameters:

DC Current Gain (hFE): May vary from specified minimum
Power - Max: May exceed 500 mW
Frequency - Transition: May exceed 130MHz
Operating Temperature: May extend beyond -55°C ~ 150°C range
Packaging Format: Bulk, Tape & Reel, or Cut Tape formats are interchangeable for component selection

All identified substitute parts meet or exceed the mandatory electrical and mechanical requirements of the BCX55-16-TP.

Parameter Comparison

Parameter	BCX55-16-TP (Micro Commercial Co)	BCX54TA (Diodes Incorporated)	BCX55,115 (Nexperia USA Inc.)	BCX55TA (Diodes Incorporated)
Transistor Type	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	1 A	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	60 V	45 V	60 V	60 V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA (ICBO)	100nA (ICBO)	100nA (ICBO)	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 150mA, 2V	40 @ 150mA, 2V	63 @ 150mA, 2V	40 @ 150mA, 2V
Power - Max	500 mW	1 W	1.35 W	1 W
Frequency - Transition	130MHz	150MHz	180MHz	150MHz
Operating Temperature	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	150°C (TJ)	-65°C ~ 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	SOT-89-3	SOT-89	SOT-89-3
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

BCX54TA (Diodes Incorporated) is a qualified substitute with the following considerations: This part meets all mandatory electrical parameters with the exception of collector-emitter breakdown voltage, which is rated at 45 V compared to the 60 V specification of the BCX55-16-TP. This part is suitable for applications where the maximum operating voltage does not exceed 45 V. The BCX54TA is RoHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating. Product status is Active with high inventory availability (8100 Pcs).

BCX55,115 (Nexperia USA Inc.) is a direct electrical equivalent with enhanced performance characteristics. This part matches the 60 V collector-emitter breakdown voltage and 1 A collector current specification. The BCX55,115 provides higher power dissipation capability (1.35 W versus 500 mW) and faster transition frequency (180MHz versus 130MHz). This part is RoHS3 compliant with MSL 1 (Unlimited) rating. Product status is Active with the highest inventory availability (46300 Pcs).

BCX55TA (Diodes Incorporated) is a direct electrical equivalent with identical voltage and current ratings to the BCX55-16-TP. This part matches the 60 V collector-emitter breakdown voltage and 1 A collector current specification. The BCX55TA provides higher power dissipation capability (1 W versus 500 mW) and faster transition frequency (150MHz versus 130MHz). This part is RoHS3 compliant with MSL 1 (Unlimited) rating. Product status is Active with high inventory availability (189100 Pcs).

All substitute parts are manufactured by established semiconductor suppliers with Active product status and REACH Unaffected compliance. Selection among substitutes should be based on application voltage requirements, thermal design constraints, and packaging format availability.

Frequently Asked Questions (FAQ)

Q: Can BCX54TA be used as a direct replacement for BCX55-16-TP?

A: BCX54TA is functionally equivalent for applications operating at 45 V or below. The BCX54TA collector-emitter breakdown voltage is rated at 45 V, which is lower than the BCX55-16-TP specification of 60 V. For circuits designed to operate at voltages exceeding 45 V, BCX54TA is not suitable. All other electrical parameters match the mandatory criteria.

Q: What is the difference between BCX55,115 and BCX55TA?

A: Both parts are electrically equivalent to the BCX55-16-TP with identical voltage and current ratings. The primary differences are: BCX55,115 is supplied by Nexperia USA Inc. in Tape & Reel format with 180MHz transition frequency, while BCX55TA is supplied by Diodes Incorporated in Cut Tape & Digi-Reel format with 150MHz transition frequency. Both provide higher power dissipation than the original part.

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

A: Both SOT-89 and SOT-89-3 designations refer to the same TO-243AA package case outline. The "-3" suffix indicates a specific supplier variant designation. Parts specified as SOT-89-3 are mechanically and electrically compatible with SOT-89 footprints in PCB designs.

Q: What is the significance of the DC Current Gain (hFE) variation among substitute parts?

A: The BCX55-16-TP specifies a minimum hFE of 100 at 150mA collector current and 2V collector-emitter voltage. Substitute parts BCX54TA and BCX55TA specify a minimum hFE of 40, while BCX55,115 specifies 63. Lower hFE values require higher base drive current to achieve saturation. Circuit designs must account for this parameter when selecting a substitute to ensure adequate base current is provided.

Q: Can these parts be used interchangeably in existing PCB assemblies?

A: Yes, all substitute parts use the TO-243AA package (SOT-89 family) with identical pin configuration and footprint. Direct PCB substitution is mechanically feasible. Electrical compatibility depends on application voltage requirements and base drive circuit design, as noted in the parameter comparison table.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed carry REACH Unaffected status and EAR99 export classification. BCX54TA, BCX55,115, and BCX55TA are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The original BCX55-16-TP carries REACH Unaffected status with EAR99 classification.

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