FZTA14TC Equivalent & Substitute Parts

Part Overview

The FZTA14TC is an NPN Darlington bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-223-3 package. This component operates at a maximum collector current of 1 A with a 30 V collector-emitter breakdown voltage and delivers 2 W maximum power dissipation. The FZTA14TC is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) (Max)	1	A
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	1.6V @ 1mA, 1A	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	20000 @ 100mA, 5V	—
Power - Max	2	W
Frequency - Transition	170	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-261-4, TO-261AA	—
Supplier Device Package	SOT-223-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the FZTA14TC is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor Type: NPN - Darlington configuration
Voltage - Collector Emitter Breakdown (Max): 30 V minimum
Current - Collector (Ic) (Max): Equal to or greater than 1 A
DC Current Gain (hFE) (Min): 20000 @ 100mA, 5V
Current - Collector Cutoff (Max): 100 nA maximum
Operating Temperature Range: -55°C to 150°C minimum

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case: TO-261-4 or TO-261AA
Supplier Device Package: SOT-223 series (SOT-223-3 or SOT-223-4)

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications and packaging) and manufacturer-recommended alternatives (compatible electrical performance with potential variations in secondary parameters such as power dissipation or transition frequency).

Parameter Comparison

Parameter	FZTA14TC (Main)	FZTA14TA	PZTA14 (onsemi)	PZTA14,115 (Nexperia)	PZTA14H6327XTSA1 (Infineon)
Manufacturer	Diodes Incorporated	Diodes Incorporated	onsemi	Nexperia USA Inc.	Infineon Technologies
Product Status	Obsolete	Active	Active	Active	Obsolete
Transistor Type	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington
Current - Collector (Ic) (Max)	1 A	1 A	1.2 A	500 mA	300 mA
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V	30 V	30 V
Vce Saturation (Max) @ Ib, Ic	1.6V @ 1mA, 1A	1.6V @ 1mA, 1A	1.5V @ 100µA, 100mA	1.5V @ 100µA, 100mA	1.5V @ 100µA, 100mA
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA	100 nA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	20000 @ 100mA, 5V	20000 @ 100mA, 5V	20000 @ 100mA, 5V	20000 @ 100mA, 5V	20000 @ 100mA, 5V
Power - Max	2 W	2 W	1 W	1.25 W	1.5 W
Frequency - Transition	170 MHz	170 MHz	125 MHz	125 MHz	125 MHz
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	SOT-223-3	SOT-223-3	SOT-223-4	SOT-223	PG-SOT223-4
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

FZTA14TA (Diodes Incorporated) - Parametric Equivalent

The FZTA14TA is the direct parametric equivalent to the FZTA14TC. Both parts share identical electrical specifications including 1 A maximum collector current, 30 V breakdown voltage, 2 W power dissipation, and 170 MHz transition frequency. The FZTA14TA is currently in active production status with substantial inventory availability (35,200 pcs), whereas the FZTA14TC is obsolete. The FZTA14TA maintains the same SOT-223-3 package configuration and is ROHS3 compliant with REACH unaffected status. This part is the primary replacement for the FZTA14TC in new designs and production continuity.

PZTA14 (onsemi) - Manufacturer-Recommended Alternative

The PZTA14 from onsemi is a manufacturer-recommended substitute offering 1.2 A maximum collector current, exceeding the FZTA14TC specification of 1 A. This part maintains the 30 V breakdown voltage and 20000 hFE minimum gain. The PZTA14 operates at 125 MHz transition frequency compared to the FZTA14TC's 170 MHz, and provides 1 W maximum power dissipation versus 2 W. The part is supplied in SOT-223-4 package configuration and is currently active with 18,440 pcs in inventory. Selection of this part is appropriate for applications where the reduced power dissipation and lower transition frequency do not constrain circuit performance.

PZTA14,115 (Nexperia USA Inc.) - Manufacturer-Recommended Alternative

The PZTA14,115 from Nexperia is a manufacturer-recommended substitute with 500 mA maximum collector current, which is below the FZTA14TC specification of 1 A. This part is qualified to AEC-Q101 automotive standards and carries automotive grade designation. The PZTA14,115 maintains 30 V breakdown voltage and 20000 hFE minimum gain with 125 MHz transition frequency. Maximum power dissipation is 1.25 W. This part is suitable for applications with collector current requirements not exceeding 500 mA and where automotive qualification is required or beneficial.

PZTA14H6327XTSA1 (Infineon Technologies) - Obsolete Alternative

The PZTA14H6327XTSA1 from Infineon is classified as obsolete with limited inventory (664 pcs). This part provides 300 mA maximum collector current, significantly below the FZTA14TC specification. While it maintains 30 V breakdown voltage and 20000 hFE minimum gain, the reduced current rating and power dissipation (1.5 W) restrict its application scope. This part is not recommended for new designs due to obsolete status and reduced electrical capability.

Frequently Asked Questions (FAQ)

Q: Can the FZTA14TA directly replace the FZTA14TC without circuit modifications?

A: Yes. The FZTA14TA is a parametric equivalent with identical electrical specifications and package configuration. Both parts feature 1 A maximum collector current, 30 V breakdown voltage, 2 W power dissipation, and 170 MHz transition frequency in SOT-223-3 packaging. Direct substitution is supported without circuit redesign.

Q: What is the primary difference between the FZTA14TC and PZTA14 from onsemi?

A: The PZTA14 provides higher maximum collector current (1.2 A versus 1 A) but operates at lower transition frequency (125 MHz versus 170 MHz) and reduced maximum power dissipation (1 W versus 2 W). The PZTA14 is suitable for applications where the reduced frequency and power rating do not constrain performance and where the higher current capability is beneficial.

Q: Is the PZTA14,115 suitable for all applications requiring the FZTA14TC?

A: No. The PZTA14,115 has a maximum collector current of 500 mA, which is 50% of the FZTA14TC specification. This part is suitable only for applications with collector current requirements not exceeding 500 mA. The PZTA14,115 is recommended for designs where automotive qualification (AEC-Q101) is required and current demands are within its rating.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (FZTA14TA, PZTA14, PZTA14,115, and PZTA14H6327XTSA1) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the FZTA14TC.

Q: What is the difference between SOT-223-3 and SOT-223-4 packaging?

A: SOT-223-3 and SOT-223-4 are both surface mount packages in the SOT-223 family with identical external dimensions and pin pitch. The primary difference is the number of leads: SOT-223-3 has three leads while SOT-223-4 has four leads. Both package types fit the same footprint category (TO-261-4, TO-261AA) and are mechanically compatible for most applications, though PCB layout and trace routing may require adjustment based on specific pin configuration.

Q: Why is the FZTA14TC classified as obsolete?

A: The FZTA14TC is classified as obsolete by Diodes Incorporated, indicating that the manufacturer has discontinued production and support for this part number. The FZTA14TA serves as the active replacement, offering identical specifications with ongoing production and availability.

Q: Can the PZTA14H6327XTSA1 be used in new production designs?

A: The PZTA14H6327XTSA1 is classified as obsolete and carries limited inventory (664 pcs). This part is not recommended for new production designs. The FZTA14TA or PZTA14 are preferred alternatives with active production status and substantially higher inventory availability.

Q: What compliance certifications apply to these substitute parts?

A: All substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). The PZTA14,115 carries additional AEC-Q101 automotive qualification. The FZTA14TA and PZTA14 have REACH unaffected status, while the FZTA14TC has REACH affected status.

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