FZT651TC Equivalent & Substitute Parts

Part Overview

The FZT651TC is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-223-3 package. This device operates at 60 V collector-emitter breakdown voltage with a maximum collector current of 3 A and a maximum power dissipation of 2 W. The transistor is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for parametric variations within acceptable operating ranges.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	3	A
Power - Max	2	W
Frequency - Transition	175	MHz
Vce Saturation (Max) @ Ib, Ic	600mV @ 300mA, 3A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 500mA, 2V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	TO-261-4, TO-261AA	—
Supplier Device Package	SOT-223-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FZT651TC is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 60 V minimum
Current - Collector (Ic) (Max): 3 A minimum
Package / Case: TO-261-4 or TO-261AA
Supplier Device Package: SOT-223 variant (SOT-223-3 or SOT-223-4)
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant

Secondary Consideration Parameters:

Power - Max: 2 W or greater
Frequency - Transition: 175 MHz or greater
Vce Saturation: 600 mV or lower at specified conditions
DC Current Gain (hFE): 100 or greater at specified conditions

Substitute parts are grouped into three categories: Direct Manufacturer equivalents (same base product number with different packaging), Parametric Equivalents (identical electrical specifications with different certifications), and Manufacturer Recommended alternatives (different manufacturers with comparable electrical characteristics).

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce Breakdown	Power (Max)	Frequency	Package	Product Status	Packaging Type
FZT651TC	Diodes Incorporated	3 A	60 V	2 W	175 MHz	SOT-223-3	Active	Tape & Reel (TR)
FZT651QTA	Diodes Incorporated	3 A	60 V	3 W	175 MHz	SOT-223-3	Active	Cut Tape (CT) & Digi-Reel®
FZT651QTC	Diodes Incorporated	3 A	60 V	2 W	175 MHz	SOT-223-3	Active	Tape & Reel (TR)
FZT651TA	Diodes Incorporated	3 A	60 V	2 W	175 MHz	SOT-223-3	Active	Cut Tape (CT)
NZT560	onsemi	3 A	60 V	1 W	75 MHz	SOT-223-4	Active	Tape & Reel (TR)
2STN1360	STMicroelectronics	3 A	60 V	1.6 W	130 MHz	SOT-223	Active	Cut Tape (CT) & Digi-Reel®
BCP55	onsemi	1.5 A	60 V	1.5 W	—	SOT-223-4	Active	Cut Tape (CT) & Digi-Reel®
BCP55,115	Nexperia USA Inc.	1 A	60 V	1.35 W	180 MHz	SOT-223	Active	Tape & Reel (TR)
BCP55-10,115	Nexperia USA Inc.	1 A	60 V	1.35 W	180 MHz	SOT-223	Active	Cut Tape (CT) & Digi-Reel®
BCP55-16,115	Nexperia USA Inc.	1 A	60 V	1.35 W	180 MHz	SOT-223	Active	Tape & Reel (TR)
BCP55H6327XTSA1	Infineon Technologies	1 A	60 V	2 W	100 MHz	PG-SOT223-4-10	Obsolete	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Equivalents (Recommended for Direct Substitution):

FZT651QTA, FZT651QTC, and FZT651TA are direct equivalents manufactured by Diodes Incorporated under the same base product number FZT651. These parts maintain identical electrical specifications to the FZT651TC with respect to collector current (3 A), collector-emitter breakdown voltage (60 V), transition frequency (175 MHz), and operating temperature range (-55°C to 150°C). All three parts are Active product status and RoHS3 compliant. Selection among these three is determined by packaging requirements: FZT651QTA is available in Cut Tape & Digi-Reel® format with enhanced power rating (3 W); FZT651QTC is available in Tape & Reel format with automotive qualification (AEC-Q101); FZT651TA is available in Cut Tape format with the highest inventory availability (44,020 pieces).

Parametric Equivalents (Conditional Substitution):

NZT560 (onsemi) and 2STN1360 (STMicroelectronics) meet the primary electrical criteria of 60 V breakdown voltage and 3 A collector current. However, both parts exhibit reduced transition frequency (75 MHz and 130 MHz respectively, compared to 175 MHz) and reduced maximum power dissipation (1 W and 1.6 W respectively, compared to 2 W). These parts are suitable for applications where the lower frequency and power specifications do not constrain circuit performance.

Limited Current Alternatives (Reduced Current Rating):

BCP55 series parts (BCP55, BCP55,115, BCP55-10,115, BCP55-16,115) from onsemi and Nexperia USA Inc. maintain the 60 V breakdown voltage specification but are limited to 1 A or 1.5 A maximum collector current, compared to the 3 A rating of FZT651TC. These parts are suitable only for applications where the circuit design operates at collector currents below 1.5 A. BCP55H6327XTSA1 (Infineon Technologies) is classified as Obsolete product status and is not recommended for new designs.

Compliance and Certification:

All recommended substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). FZT651QTC includes automotive qualification (AEC-Q101), which is appropriate for automotive applications. Standard industrial applications may use any of the Active status parts without additional qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can FZT651QTA be used as a direct replacement for FZT651TC?

A: Yes. FZT651QTA is a direct equivalent manufactured by Diodes Incorporated with identical electrical specifications (3 A, 60 V, 175 MHz, -55°C to 150°C). The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and enhanced power rating (3 W versus 2 W). Electrical performance in the circuit is identical.

Q: What is the difference between FZT651QTC and FZT651TC?

A: FZT651QTC is a parametric equivalent with identical electrical specifications and packaging format (Tape & Reel, SOT-223-3). The key difference is automotive qualification (AEC-Q101) and higher inventory availability. Both parts are suitable for the same applications.

Q: Can NZT560 replace FZT651TC in all applications?

A: NZT560 meets the primary voltage (60 V) and current (3 A) specifications but operates at reduced transition frequency (75 MHz versus 175 MHz) and reduced power dissipation (1 W versus 2 W). Substitution is valid only for applications where these reduced specifications do not impact circuit performance. The SOT-223-4 package is mechanically compatible with SOT-223-3 footprints.

Q: Why are BCP55 series parts listed as alternatives if they have lower current ratings?

A: BCP55 series parts are listed as manufacturer-recommended alternatives because they share the same 60 V breakdown voltage and SOT-223 package family. However, the maximum collector current is limited to 1 A or 1.5 A. These parts are suitable only for circuits designed to operate within these current limits. Direct substitution without circuit redesign is not appropriate for applications requiring 3 A operation.

Q: Is BCP55H6327XTSA1 suitable for new designs?

A: No. BCP55H6327XTSA1 is classified as Obsolete product status. New designs should not incorporate this part number. Active alternatives such as FZT651QTA, FZT651QTC, or FZT651TA are recommended.

Q: What packaging formats are available for FZT651 equivalents?

A: FZT651 equivalents are available in three packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) for manual or semi-automated assembly, and Cut Tape & Digi-Reel® for flexible supply options. All formats use the SOT-223-3 package with TO-261-4 or TO-261AA case designation. Selection is based on manufacturing process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and unlimited moisture sensitivity level (MSL 1), consistent with the FZT651TC specification.

Q: What is the operating temperature range for substitute parts?

A: All recommended substitute parts operate across the -55°C to 150°C temperature range, matching the FZT651TC specification. This range is suitable for industrial and automotive applications.

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