KTA2014-O-TP Equivalent & Substitute Parts

Part Overview

The KTA2014-O-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 50 V collector-emitter breakdown voltage and 150 mA maximum collector current. The device is housed in a SOT-323 (SC-70) surface mount package and is designed for general-purpose switching and amplification applications operating at frequencies up to 80 MHz.

The KTA2014-O-TP carries an Obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	150	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Vce Saturation (Max) @ Ib, Ic	300 mV @ 10 mA, 100 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	70 @ 2 mA, 6 V	—
Power - Max	100	mW
Frequency - Transition	80	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the KTA2014-O-TP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Transistor type: PNP
Maximum collector current: 150 mA
Maximum collector-emitter breakdown voltage: 50 V
Maximum collector cutoff current: 100 nA
Operating temperature range: minimum 150°C junction temperature

Mechanical Equivalence Criteria:

Surface mount mounting type
Package compatibility: SOT-323 family packages (SC-70, UMT3, EMT3, VMT3, SC-75)

Compliance Requirements:

RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories based on functional compatibility:

Category A - Direct Functional Equivalents: Parts meeting all electrical parameters and operating at the same or higher frequency and power ratings with identical or superior saturation voltage characteristics.

Category B - Enhanced Performance Alternatives: Parts exceeding the KTA2014-O-TP specifications in frequency response, power dissipation, or current gain while maintaining backward compatibility with the core electrical ratings.

Parameter Comparison

Parameter	KTA2014-O-TP	2SA1586-Y,LF	2PA1576S,115	2SA1576AT106R	2SA1774TLQ	2SA2029T2LQ
Manufacturer	Micro Commercial Co	Toshiba Semiconductor and Storage	Nexperia USA Inc.	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP
Ic (Max)	150 mA	150 mA	150 mA	150 mA	150 mA	150 mA
Vce Breakdown (Max)	50 V	50 V	50 V	50 V	50 V	50 V
Vce Saturation (Max)	300 mV @ 10 mA, 100 mA	300 mV @ 10 mA, 100 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA	500 mV @ 5 mA, 50 mA
Icbo (Max)	100 nA	100 nA	100 nA	100 nA	100 nA	100 nA
hFE (Min) @ Ic, Vce	70 @ 2 mA, 6 V	120 @ 2 mA, 6 V	270 @ 1 mA, 6 V	180 @ 1 mA, 6 V	120 @ 1 mA, 6 V	120 @ 1 mA, 6 V
Power (Max)	100 mW	100 mW	200 mW	200 mW	150 mW	150 mW
Frequency - Transition	80 MHz	80 MHz	100 MHz	140 MHz	140 MHz	140 MHz
Operating Temperature (TJ)	150°C	125°C	150°C	150°C	150°C	150°C
Package / Case	SC-70, SOT-323	SC-70	SC-70, SOT-323	SC-70, SOT-323	SC-75, SOT-416	SOT-723
Product Status	Obsolete	Active	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

2SA1586-Y,LF (Toshiba Semiconductor and Storage)

This part provides direct electrical equivalence to the KTA2014-O-TP with identical saturation voltage characteristics and transition frequency. The device maintains the same 100 mW power rating and 80 MHz frequency response. Product status is Active, ensuring long-term availability. The SC-70 package provides mechanical compatibility. Operating temperature is specified at 125°C, which is 25°C lower than the KTA2014-O-TP. This part is suitable for applications where the lower operating temperature specification is acceptable.

2PA1576S,115 (Nexperia USA Inc.)

This part meets all core electrical requirements with 150 mA collector current and 50 V breakdown voltage. Enhanced specifications include 200 mW power dissipation and 100 MHz transition frequency. The device carries Active product status and AEC-Q101 automotive qualification, indicating robust manufacturing and quality standards. Vce saturation is specified at 500 mV, which is higher than the KTA2014-O-TP. This part is suitable for applications where enhanced power handling and automotive-grade reliability are required.

2SA1576AT106R (Rohm Semiconductor)

This part exceeds KTA2014-O-TP specifications with 140 MHz transition frequency and 200 mW power rating. The device carries Not For New Designs status, indicating it remains available but is not recommended for new circuit designs. The UMT3 package is mechanically compatible within the SOT-323 family. This part is suitable only for sustaining existing production of established designs.

2SA1774TLQ (Rohm Semiconductor)

This part provides enhanced performance with 140 MHz transition frequency and 150 mW power rating. Product status is Active, ensuring continued availability. The SC-75 (SOT-416) package differs from the KTA2014-O-TP SOT-323 package; PCB layout modification is required for implementation. This part is suitable for applications where higher frequency response is beneficial and package footprint change is acceptable.

2SA2029T2LQ (Rohm Semiconductor)

This part delivers enhanced specifications with 140 MHz transition frequency and 150 mW power rating. Product status is Active with highest inventory availability (1,000,100 pieces). The VMT3 package (SOT-723) is mechanically distinct from the KTA2014-O-TP SOT-323 package; significant PCB redesign is required. This part is suitable for new designs where the smaller SOT-723 footprint provides space optimization benefits.

Frequently Asked Questions (FAQ)

Q: Can 2SA1586-Y,LF be used as a direct replacement for KTA2014-O-TP without circuit modification?

A: Yes. The 2SA1586-Y,LF provides electrical equivalence with identical saturation voltage (300 mV @ 10 mA, 100 mA) and transition frequency (80 MHz). Both devices use SC-70 package pinouts. The lower operating temperature specification (125°C vs. 150°C) must be verified against application thermal requirements.

Q: What is the primary difference between 2PA1576S,115 and KTA2014-O-TP?

A: The 2PA1576S,115 provides higher power dissipation (200 mW vs. 100 mW) and higher transition frequency (100 MHz vs. 80 MHz). Vce saturation is higher at 500 mV compared to 300 mV. The part carries AEC-Q101 automotive qualification. These differences indicate suitability for higher-power applications.

Q: Why do 2SA1774TLQ and 2SA2029T2LQ require PCB layout changes?

A: These parts use different package types. The 2SA1774TLQ uses SC-75 (SOT-416) package, and the 2SA2029T2LQ uses SOT-723 package. The KTA2014-O-TP uses SOT-323 package. Different package types have different pin configurations, spacing, and footprints, requiring PCB redesign.

Q: Is 2SA1576AT106R suitable for new product designs?

A: No. The 2SA1576AT106R carries Not For New Designs product status. This designation indicates the part remains available for sustaining existing production but should not be selected for new circuit designs. Active alternatives such as 2SA1774TLQ or 2SA2029T2LQ are recommended for new designs.

Q: What does RoHS3 compliance mean for substitution?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts carry RoHS3 compliance, ensuring environmental and regulatory compatibility with the KTA2014-O-TP.

Q: Can parts with higher hFE values be used interchangeably?

A: Higher hFE values indicate greater current gain. Parts such as 2PA1576S,115 (hFE 270 @ 1 mA) have significantly higher current gain than KTA2014-O-TP (hFE 70 @ 2 mA). While electrically compatible, higher gain may affect circuit biasing and frequency response. Circuit analysis is required to confirm suitability.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1, ensuring identical moisture management requirements.

Q: Are there package compatibility constraints between substitute parts?

A: Yes. The KTA2014-O-TP uses SOT-323 package. Direct pin-compatible substitutes are 2SA1586-Y,LF (SC-70), 2PA1576S,115 (SOT-323), and 2SA1576AT106R (UMT3). The 2SA1774TLQ (SC-75/SOT-416) and 2SA2029T2LQ (SOT-723) require PCB redesign. Verify package pinout compatibility before implementation.

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