FZT600TC Equivalent & Substitute Parts

Part Overview

The FZT600TC is a Bipolar (BJT) NPN Darlington transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-223-3 package. This component operates at 140 V collector-emitter breakdown voltage with a maximum collector current of 2 A and is rated for 2 W power dissipation. The FZT600TC is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and production continuity. Active alternatives with identical electrical and mechanical specifications are available to ensure uninterrupted component sourcing.

Key Parameters

Parameter	Value
Transistor Type	NPN - Darlington
Current - Collector (Ic) (Max)	2 A
Voltage - Collector Emitter Breakdown (Max)	140 V
Vce Saturation (Max) @ Ib, Ic	1.2V @ 10mA, 1A
Current - Collector Cutoff (Max)	10µA
DC Current Gain (hFE) (Min) @ Ic, Vce	2000 @ 500mA, 10V
Power - Max	2 W
Frequency - Transition	250MHz
Operating Temperature	-55°C ~ 150°C (TJ)
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 FZT600TC is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain identical specifications for collector current rating, collector-emitter breakdown voltage, saturation voltage characteristics, DC current gain, power dissipation, transition frequency, and operating temperature range. The package type and mounting configuration must also be identical to ensure direct board-level compatibility without design modification.

The FZT600TA qualifies as a parametric equivalent substitute based on the following criteria:

Identical transistor type classification (NPN - Darlington)
Matching maximum collector current (2 A)
Matching collector-emitter breakdown voltage (140 V)
Identical saturation voltage specification (1.2V @ 10mA, 1A)
Matching collector cutoff current (10µA)
Identical DC current gain (2000 @ 500mA, 10V)
Matching power rating (2 W)
Identical transition frequency (250MHz)
Matching operating temperature range (-55°C ~ 150°C)
Identical surface mount package (SOT-223-3)
Identical RoHS3 compliance status
Identical MSL rating (1 - Unlimited)

Parameter Comparison

Parameter	FZT600TC	FZT600TA	Match
Manufacturer	Diodes Incorporated	Diodes Incorporated	Yes
Transistor Type	NPN - Darlington	NPN - Darlington	Yes
Current - Collector (Ic) (Max)	2 A	2 A	Yes
Voltage - Collector Emitter Breakdown (Max)	140 V	140 V	Yes
Vce Saturation (Max) @ Ib, Ic	1.2V @ 10mA, 1A	1.2V @ 10mA, 1A	Yes
Current - Collector Cutoff (Max)	10µA	10µA	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	2000 @ 500mA, 10V	2000 @ 500mA, 10V	Yes
Power - Max	2 W	2 W	Yes
Frequency - Transition	250MHz	250MHz	Yes
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Supplier Device Package	SOT-223-3	SOT-223-3	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Yes
Product Status	Obsolete	Active	Functional Upgrade

Engineering Selection Recommendations

The FZT600TA is the direct parametric equivalent for the obsolete FZT600TC. Both components share identical electrical specifications and mechanical packaging, enabling direct substitution without circuit redesign or board layout modification.

The FZT600TA offers the additional advantage of active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, satisfying regulatory and environmental requirements.

Selection between these parts is determined by availability and supply chain considerations. The FZT600TA is the preferred choice for new designs and production continuity due to its active status and higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the FZT600TA directly replace the FZT600TC without circuit modification?

A: Yes. The FZT600TA is a parametric equivalent with identical electrical and mechanical specifications. Direct substitution is possible without circuit redesign or board layout changes.

Q: What is the primary difference between FZT600TC and FZT600TA?

A: The FZT600TC is classified as obsolete, while the FZT600TA maintains active product status. All electrical parameters, package type, and compliance certifications are identical.

Q: Are both parts available in the same package configuration?

A: Yes. Both the FZT600TC and FZT600TA are supplied in the SOT-223-3 surface mount package with identical pin configuration and mechanical dimensions.

Q: Do both parts meet the same regulatory and environmental standards?

A: Yes. Both components are ROHS3 compliant with identical moisture sensitivity level ratings (MSL 1 - Unlimited), satisfying equivalent regulatory requirements.

Q: Why should I select the FZT600TA over the FZT600TC?

A: The FZT600TA is recommended for new designs and ongoing production due to its active product status, ensuring sustained availability and supply chain reliability.

Q: Are there any performance differences between these two parts?

A: No. Both parts deliver identical performance across all specified electrical parameters, including collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and frequency response.

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