BCX17TA Equivalent & Substitute Parts

Part Overview

The BCX17TA is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for general-purpose switching and amplification applications. The device features a 45 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 330 mW power dissipation in a surface mount SOT-23-3 package. The BCX17TA is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	500	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	620 mV @ 50 mA, 500 mA	—
DC Current Gain (hFE Min) @ Ic, Vce	100 @ 100 mA, 1 V	—
Power Dissipation (Max)	330	mW
Transition Frequency	100	MHz
Operating Temperature Range	−55 to 150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BCX17TA is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Transistor type: PNP
Collector current rating: 500 mA (maximum)
Collector-emitter breakdown voltage: 45 V (maximum)
DC current gain (hFE): minimum 100 @ 100 mA, 1 V
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting type: Surface Mount
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

Allowable Variation Parameters:

Power dissipation: 250 mW to 330 mW (lower values acceptable for reduced thermal load)
Transition frequency: 80 MHz to 100 MHz (lower values acceptable for non-critical frequency applications)
Vce saturation: 620 mV to 700 mV @ 50 mA, 500 mA (minor variation acceptable)
Operating temperature maximum: 150°C (fixed requirement)
Collector cutoff current: 100 nA to 200 nA (minor variation acceptable)

Substitute parts are grouped into two categories: direct functional equivalents (matching all critical parameters) and parametric equivalents (meeting minimum electrical requirements with acceptable variations in secondary parameters).

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce(br) V	Vce Sat mV	hFE (Min)	Power mW	Freq MHz	Temp °C	Package
BCX17TA	Diodes Inc.	Obsolete	500	45	620 @ 50, 500	100 @ 100, 1V	330	100	−55 to 150	SOT-23-3
BC807-16-7-F	Diodes Inc.	Active	500	45	700 @ 50, 500	100 @ 100, 1V	310	100	−55 to 150	SOT-23-3
BC807,215	Nexperia USA	Active	500	45	700 @ 50, 500	100 @ 100, 1V	250	80	−55 to 150	SOT-23-3
BC807-16,215	Nexperia USA	Active	500	45	700 @ 50, 500	100 @ 100, 1V	250	80	−55 to 150	SOT-23-3
BC807-16-TP	Micro Commercial Co	Active	500	45	700 @ 50, 500	100 @ 100, 1V	300	100	−55 to 150	SOT-23-3
BC807-16LT1G	onsemi	Active	500	45	700 @ 50, 500	100 @ 100, 1V	300	100	−55 to 150	SOT-23-3
BCX17,215	Nexperia USA	Active	500	45	620 @ 50, 500	100 @ 100, 1V	250	80	−55 to 150	SOT-23-3
BCX17LT1G	onsemi	Active	500	45	620 @ 50, 500	100 @ 100, 1V	300	Not specified	−55 to 150	SOT-23-3
SBC807-16LT1G	onsemi	Active	500	45	700 @ 50, 500	100 @ 100, 1V	300	100	−55 to 150	SOT-23-3
SBC807-16LT3G	onsemi	Active	500	45	700 @ 50, 500	100 @ 100, 1V	300	100	−55 to 150	SOT-23-3

Engineering Selection Recommendations

Direct Functional Equivalents (Highest Compatibility):

BC807-16LT1G (onsemi) and BC807-16-TP (Micro Commercial Co) provide direct functional equivalence to the BCX17TA. Both devices match all critical electrical parameters, maintain the 100 MHz transition frequency, and operate across the full −55°C to 150°C temperature range. These parts are in active production status with substantial inventory availability.

Parametric Equivalents with Acceptable Variations:

BC807-16-7-F (Diodes Incorporated) offers near-identical performance with a 10 mV increase in Vce saturation and 20 mW reduction in power dissipation. This part maintains 100 MHz transition frequency and full temperature range operation.

BC807,215 and BC807-16,215 (Nexperia USA Inc.) are parametric equivalents with reduced transition frequency (80 MHz) and power dissipation (250 mW). These parts are suitable for applications where the lower frequency specification does not impact circuit performance. Both are AEC-Q101 qualified automotive-grade components.

Matched Saturation Voltage Equivalents:

BCX17,215 (Nexperia USA Inc.) and BCX17LT1G (onsemi) maintain the original 620 mV Vce saturation specification, providing superior compatibility for circuits sensitive to saturation voltage characteristics. BCX17LT1G is available in high volume with active production status.

Automotive-Grade Alternatives:

SBC807-16LT1G and SBC807-16LT3G (onsemi) are automotive-qualified variants with AEC-Q101 certification. These parts meet all electrical requirements of the BCX17TA and are suitable for automotive and industrial applications requiring enhanced reliability qualification.

Selection Basis:

Component selection should prioritize active production status and inventory availability. BC807-16LT1G represents the optimal choice for general replacement applications due to active status, high inventory levels (146,930 units), and complete parameter matching. For automotive applications, SBC807-16LT1G or SBC807-16LT3G provide equivalent performance with formal automotive qualification. Applications requiring matched saturation voltage characteristics should specify BCX17LT1G or BCX17,215.

Frequently Asked Questions (FAQ)

Q: Can BC807-16LT1G directly replace BCX17TA in all applications?

A: Yes. BC807-16LT1G meets all critical electrical parameters of the BCX17TA: 500 mA collector current, 45 V breakdown voltage, 100 mA minimum hFE at 100 mA and 1 V, 100 MHz transition frequency, and −55°C to 150°C operating range. The package type (SOT-23-3) and mounting configuration are identical. No circuit modifications are required.

Q: What is the difference between BC807-16,215 and BC807-16LT1G?

A: BC807-16,215 (Nexperia USA Inc.) operates at 80 MHz transition frequency with 250 mW power dissipation and includes AEC-Q101 automotive qualification. BC807-16LT1G (onsemi) operates at 100 MHz with 300 mW power dissipation and does not carry automotive qualification. Both meet the 500 mA, 45 V, and hFE requirements. Selection depends on frequency requirements and automotive qualification necessity.

Q: Why do some substitute parts show lower power dissipation ratings?

A: Power dissipation ratings reflect the maximum thermal capability of the device package and internal design. Lower ratings (250 mW vs. 330 mW) indicate more conservative thermal design but do not affect electrical functionality. Devices with lower power ratings are suitable for applications where thermal load is not a limiting factor. Circuit performance remains equivalent across the specified operating range.

Q: Are there differences in Vce saturation between substitute parts?

A: Yes. The BCX17TA specifies 620 mV Vce saturation at 50 mA base current and 500 mA collector current. Most BC807 variants specify 700 mV under identical conditions. This 80 mV difference is acceptable for general switching applications but may impact circuits requiring precise saturation voltage control. BCX17,215 and BCX17LT1G maintain the original 620 mV specification for applications requiring matched saturation characteristics.

Q: Can I use SBC807-16LT1G in non-automotive applications?

A: Yes. SBC807-16LT1G is an automotive-qualified variant of BC807-16LT1G with identical electrical specifications and package configuration. Automotive qualification (AEC-Q101) indicates enhanced reliability testing and process control but does not restrict use in non-automotive applications. The part is fully compatible with standard industrial and consumer applications.

Q: What is the significance of the packaging designation differences (SOT-23-3 vs. TO-236AB)?

A: SOT-23-3 and TO-236AB are equivalent package designations for the same physical component. SOT-23-3 is the JEDEC standard designation; TO-236AB is the alternative industry designation. Both refer to a three-terminal surface mount package with identical pin configuration, dimensions, and soldering requirements. Parts specified with either designation are mechanically and electrically interchangeable.

Q: Why is BCX17TA classified as obsolete?

A: Obsolete status indicates the manufacturer (Diodes Incorporated) has discontinued production and support for this part number. Active equivalent parts from multiple manufacturers (onsemi, Nexperia USA Inc., Micro Commercial Co) provide identical or superior functionality with ongoing production support, improved availability, and continued compliance with current regulatory standards.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed meet ROHS3 compliance requirements. The BCX17TA also carries ROHS3 compliance certification. All parts maintain Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: Which substitute part offers the best inventory availability?

A: BCX17LT1G (onsemi) provides the highest inventory availability with 293,100 units in stock. BC807-16LT1G (onsemi) offers 146,930 units. Both parts are in active production with substantial supply. For applications requiring immediate availability, these onsemi variants are recommended.

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