BCP68/ZLX Equivalent & Substitute Parts

Part Overview

The BCP68/ZLX is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-223 package. This device is rated for 20V collector-emitter breakdown voltage with a maximum collector current of 2A and operates at frequencies up to 170MHz. The part is classified as obsolete, which necessitates identification of active equivalent components for ongoing design requirements and production continuity.

Substiute Parts

BCP68/ZLX

Nexperia USA Inc.In Stock: 728BCP68/ZLX Datasheet

Current PartRFQ

BCP68,115

NXP USA Inc.In Stock: 4375BCP68,115 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BCP68/ZLX is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor type (NPN configuration)
• Collector-emitter breakdown voltage (20V maximum)
• Transition frequency (170MHz)
• Operating temperature range (150°C maximum junction temperature)
• Package type (SOT-223 surface mount)

Functional Compatibility Criteria:

• Collector current rating must equal or exceed the application requirement
• Power dissipation capability must support the intended circuit operation
• DC current gain (hFE) characteristics must be compatible with circuit biasing

The BCP68,115 variant meets the core electrical specifications and package requirements, though with reduced maximum collector current (1A versus 2A) and modified saturation voltage characteristics. This substitution is valid for applications where the collector current requirement does not exceed 1A.

Parameter Comparison

Engineering Selection Recommendations

The BCP68,115 is an active product from NXP USA Inc. and serves as a direct functional substitute for the obsolete BCP68/ZLX in applications where the maximum collector current requirement does not exceed 1A. Both devices maintain identical voltage ratings, transition frequency, operating temperature limits, and package specifications.

The primary design consideration is the reduced maximum collector current of the BCP68,115 (1A versus 2A). Applications operating at collector currents below 1A experience no functional limitation. The DC current gain (hFE) of the BCP68,115 is lower (85 minimum versus 160 minimum), which may require circuit biasing adjustments in designs dependent on higher current gain characteristics.

Both parts maintain full compliance with RoHS3, REACH, and automotive-grade qualifications (AEC-Q101 for the main part). The BCP68,115 is available in active production with substantial inventory, ensuring supply continuity for new designs and production requirements.

Frequently Asked Questions (FAQ)

Q: Can the BCP68,115 directly replace the BCP68/ZLX in all applications?

A: The BCP68,115 is a functional substitute for applications where the collector current does not exceed 1A. If your circuit requires collector currents between 1A and 2A, the BCP68,115 is not suitable. Verify your application's maximum collector current requirement before substitution.

Q: What is the difference in DC current gain between these parts?

A: The BCP68/ZLX has a minimum DC current gain (hFE) of 160 at 500mA and 1V, while the BCP68,115 has a minimum of 85 under the same conditions. This difference affects base current requirements for saturation. Circuits designed with the higher gain of the BCP68/ZLX may require base current adjustments when using the BCP68,115.

Q: Are the package dimensions identical?

A: Both parts use the SOT-223 surface mount package (TO-261-4, TO-261AA case designation). Physical dimensions and PCB footprints are identical, allowing direct board-level substitution without layout modifications.

Q: What is the significance of the product status difference?

A: The BCP68/ZLX is classified as obsolete, indicating discontinued production and limited availability. The BCP68,115 is an active product with ongoing production and supply availability, making it the appropriate choice for new designs and long-term production requirements.

Q: Are there compliance or certification differences?

A: Both parts are RoHS3 compliant and REACH unaffected. The BCP68/ZLX carries AEC-Q101 automotive qualification. Verify that your application requirements align with the compliance status of the selected part.

Q: What is the saturation voltage difference, and does it matter?

A: The BCP68/ZLX has a maximum saturation voltage of 600mV at 200mA and 2A, while the BCP68,115 is rated at 500mV at 100mA and 1A. The lower saturation voltage of the BCP68,115 at reduced current levels may provide improved switching efficiency in low-current applications.