NZT6727 Equivalent & Substitute Parts

Part Overview

The NZT6727 is a PNP bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 1.5 A maximum collector current in a surface mount SOT-223-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The NZT6727 is suitable for general-purpose switching and amplification applications requiring moderate current handling in compact surface mount form factors.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	V
Current - Collector (Ic) (Max)	1.5	A
Power - Max	1	W
Vce Saturation (Max) @ Ib, Ic	500mV @ 100mA, 1A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 1A, 1V	—
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-261-3	—
Supplier Device Package	SOT-223-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the NZT6727 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Transistor Type: PNP (all substitutes must be PNP)
Mounting Type: Surface Mount
Package Family: SOT-223 variants (TO-261 series)
Voltage Rating: Collector-Emitter breakdown voltage must equal or exceed 40 V
Current Rating: Collector current must equal or exceed 1.5 A
Power Dissipation: Must support 1 W minimum

Substitution Logic: Substitute parts are grouped into two categories based on their electrical characteristics relative to the NZT6727:

Direct Substitutes (Equivalent Current Rating): Parts with Ic(Max) ≥ 1.5 A and Vce(BR) ≥ 40 V maintain functional equivalence for applications designed around the NZT6727 specifications.
Enhanced Substitutes (Higher Current Capability): Parts with Ic(Max) > 1.5 A provide additional design margin and are suitable for applications requiring higher current handling or where future design modifications may increase current demands.

All substitute parts listed maintain surface mount SOT-223 packaging and operate within the -55°C to 150°C temperature range or broader, ensuring mechanical and thermal compatibility.

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce(BR) (Max)	Power (Max)	Vce Sat @ Ib, Ic	hFE (Min)	Temp Range	Package	Status
NZT6727	onsemi	1.5 A	40 V	1 W	500mV @ 100mA, 1A	50 @ 1A, 1V	-55 to 150°C	SOT-223-3	Obsolete
BCP51TA	Diodes Incorporated	1 A	45 V	2 W	500mV @ 50mA, 500mA	40 @ 150mA, 2V	-65 to 150°C	SOT-223-3	Active
BCP51,115	Nexperia USA Inc.	1 A	45 V	1 W	500mV @ 50mA, 500mA	63 @ 150mA, 2V	-55 to 150°C	SOT-223	Active
FZT790ATA	Diodes Incorporated	3 A	40 V	2 W	750mV @ 50mA, 2A	300 @ 10mA, 2V	-55 to 150°C	SOT-223-3	Active
FZT1151ATA	Diodes Incorporated	3 A	40 V	2.5 W	300mV @ 250mA, 3A	250 @ 500mA, 2V	-55 to 150°C	SOT-223-3	Active
PZT2907AT1G	onsemi	600 mA	60 V	1.5 W	1.6V @ 50mA, 500mA	100 @ 150mA, 10V	-65 to 150°C	SOT-223	Active
PZT2907AT3G	onsemi	600 mA	60 V	1.5 W	1.6V @ 50mA, 500mA	100 @ 150mA, 10V	-65 to 150°C	SOT-223	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

The BCP51TA and BCP51,115 are the preferred substitutes for the NZT6727 in applications where the original 1.5 A current specification is not exceeded. Both parts are active products with established supply chains. BCP51TA is manufactured by Diodes Incorporated and offers 2 W power dissipation with an extended temperature range (-65°C to 150°C). BCP51,115 is manufactured by Nexperia USA Inc. and includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade reliability.

Enhanced Current Capability Substitutes:

The FZT790ATA and FZT1151ATA are suitable for applications requiring higher current handling or where design margins must accommodate future modifications. Both are manufactured by Diodes Incorporated and rated for 3 A collector current at 40 V, matching the NZT6727 voltage specification. FZT1151ATA provides superior saturation characteristics (300 mV @ 250 mA, 3 A) compared to FZT790ATA (750 mV @ 50 mA, 2 A), making it preferable for low-impedance switching applications.

Alternative Voltage Rating Substitutes:

The PZT2907AT1G and PZT2907AT3G are onsemi products with higher voltage ratings (60 V) but reduced current capability (600 mA). These parts are suitable only for applications where the 1.5 A current requirement can be reduced or where higher voltage headroom is beneficial. Both are active products with identical electrical specifications; selection between them depends on packaging requirements (Cut Tape vs. Tape & Reel).

Compliance and Availability:

All recommended substitutes are RoHS3 compliant and REACH unaffected. BCP51TA and FZT790ATA/FZT1151ATA have the highest inventory availability (30,400, 43,900, and 17,641 units respectively), ensuring procurement reliability. The NZT6727 obsolete status necessitates transition to active alternatives; BCP51TA is the most direct functional replacement with minimal design impact.

Frequently Asked Questions (FAQ)

Q: Can the PZT2907AT1G replace the NZT6727 directly?

A: The PZT2907AT1G is not a direct replacement. While it maintains PNP polarity and SOT-223 packaging, its maximum collector current is 600 mA, which is 60% below the NZT6727 specification of 1.5 A. Use PZT2907AT1G only in applications where current requirements do not exceed 600 mA.

Q: What is the difference between BCP51TA and BCP51,115?

A: Both are PNP transistors rated for 45 V and 1 A with SOT-223 packaging. BCP51TA is manufactured by Diodes Incorporated with 2 W power rating and -65°C to 150°C operating range. BCP51,115 is manufactured by Nexperia USA Inc. with 1 W power rating, -55°C to 150°C operating range, and AEC-Q100 automotive qualification. Select BCP51TA for extended temperature applications; select BCP51,115 for automotive-grade requirements.

Q: Are FZT790ATA and FZT1151ATA interchangeable?

A: Both are rated for 40 V and 3 A in SOT-223-3 packaging, but they differ in saturation characteristics. FZT1151ATA exhibits lower saturation voltage (300 mV @ 250 mA, 3 A) compared to FZT790ATA (750 mV @ 50 mA, 2 A). FZT1151ATA is preferable for applications requiring efficient switching with minimal voltage drop. FZT790ATA is suitable for general-purpose applications where saturation characteristics are less critical.

Q: Does package variant affect substitution compatibility?

A: The NZT6727 uses SOT-223-3 packaging. Substitutes using SOT-223 or SOT-223-3 variants are mechanically compatible with identical PCB footprints. Verify specific package designations (TO-261-3, TO-261-4, TO-261AA) with component datasheets to confirm pin compatibility, as some variants may have different pin configurations.

Q: What is the minimum voltage rating required for a substitute?

A: The substitute must have a collector-emitter breakdown voltage (Vce(BR)) equal to or greater than 40 V to maintain the same voltage safety margin as the NZT6727. Parts rated for 45 V or 60 V provide additional voltage headroom and are acceptable. Parts rated below 40 V are not suitable.

Q: What is the minimum current rating required for a substitute?

A: The substitute must have a maximum collector current (Ic(Max)) equal to or greater than 1.5 A to handle the same current levels as the NZT6727. Parts rated for 3 A provide additional current margin. Parts rated below 1.5 A (such as the PZT2907 series at 600 mA) are suitable only for applications with reduced current requirements.

Q: Are all listed substitutes RoHS compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Which substitute offers the best availability?

A: FZT790ATA has the highest inventory availability at 43,900 units in stock. BCP51TA follows with 30,400 units. Both are active products with established supply chains suitable for high-volume procurement.

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