FZT758TC Equivalent & Substitute Parts

Part Overview

The FZT758TC is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 400 V collector-emitter breakdown voltage and 500 mA maximum collector current in a surface mount SOT-223-3 package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Transistor Type	PNP
Voltage - Collector Emitter Breakdown (Max)	400 V
Current - Collector (Ic) (Max)	500 mA
Power - Max	2 W
Frequency - Transition	50 MHz
Mounting Type	Surface Mount
Package / Case	SOT-223-3
Operating Temperature Range	-55°C to 150°C (TJ)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the FZT758TC is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type: PNP configuration
Voltage rating: Minimum 400 V collector-emitter breakdown voltage
Current rating: Minimum 500 mA collector current capacity
Package type: SOT-223-3 surface mount configuration
Temperature range: Operating capability within -55°C to 150°C

Substitution Categories:

Category 1 - Parametric Equivalent: FZT758TA matches all electrical specifications and package requirements of the FZT758TC. This substitute maintains identical voltage, current, power, and frequency ratings while offering active product status and improved availability.

Category 2 - Manufacturer Recommended (Voltage-Reduced): PBHV9540Z,115 and PZT2907AT1G/PZT2907AT3G are manufacturer-recommended alternatives that operate at reduced voltage ratings (60 V maximum) compared to the FZT758TC (400 V maximum). These substitutes are applicable only in applications where the 400 V voltage rating is not required and the circuit operates at 60 V or below.

Parameter Comparison

Parameter	FZT758TC (Main)	FZT758TA (Equivalent)	PBHV9540Z,115 (Alt)	PZT2907AT1G (Alt)	PZT2907AT3G (Alt)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	onsemi	onsemi
Transistor Type	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V	60 V	60 V
Current - Collector (Ic) (Max)	500 mA	500 mA	500 mA	600 mA	600 mA
Power - Max	2 W	2 W	1.45 W	1.5 W	1.5 W
Frequency - Transition	50 MHz	50 MHz	30 MHz	200 MHz	200 MHz
Vce Saturation (Max)	500mV @ 10mA, 100mA	500mV @ 10mA, 100mA	320mV @ 100mA, 500mA	1.6V @ 50mA, 500mA	1.6V @ 50mA, 500mA
DC Current Gain (hFE) (Min)	40 @ 200mA, 10V	40 @ 200mA, 10V	80 @ 300mA, 10V	100 @ 150mA, 10V	100 @ 150mA, 10V
Operating Temperature Range	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)	-65°C to 150°C (TJ)	-65°C to 150°C (TJ)
Package / Case	SOT-223-3	SOT-223-3	SOT-223	SOT-223 (TO-261)	SOT-223 (TO-261)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - FZT758TA:

The FZT758TA is the direct parametric equivalent for the obsolete FZT758TC. This substitute maintains identical electrical specifications across all critical parameters including 400 V voltage rating, 500 mA current capacity, 2 W power dissipation, and 50 MHz transition frequency. The FZT758TA carries active product status with significantly higher inventory availability (16,683 units in stock versus 784 units for the FZT758TC). Both devices are ROHS3 compliant and share identical package specifications. The FZT758TA is suitable for direct replacement in all applications where the FZT758TC was originally specified.

Alternative Recommendations - PBHV9540Z,115, PZT2907AT1G, PZT2907AT3G:

These alternatives are applicable only in applications where the circuit voltage requirement does not exceed 60 V. The PBHV9540Z,115 is qualified to AEC-Q100 automotive standards and carries Nexperia manufacturer recommendation. The PZT2907AT1G and PZT2907AT3G are onsemi products with higher transition frequency (200 MHz) and improved current gain characteristics. These substitutes are not suitable for circuits requiring the full 400 V voltage rating of the FZT758TC.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the FZT758TC. Moisture sensitivity level remains at MSL 1 (Unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can FZT758TA be used as a direct replacement for FZT758TC?

A: Yes. The FZT758TA is a parametric equivalent with identical electrical specifications and package configuration. It is suitable for direct replacement in all applications where the FZT758TC was originally specified.

Q: What is the primary difference between FZT758TA and the PZT2907 series?

A: The FZT758TA maintains the 400 V voltage rating of the FZT758TC, while the PZT2907AT1G and PZT2907AT3G are rated for 60 V maximum. The PZT2907 series offers higher transition frequency (200 MHz versus 50 MHz) and higher current gain, but are suitable only for low-voltage applications.

Q: Can PBHV9540Z,115 replace FZT758TC in a 400 V circuit?

A: No. The PBHV9540Z,115 is rated for 400 V collector-emitter breakdown voltage but is manufacturer-recommended as an alternative only for applications not requiring the full 400 V specification. Circuit voltage requirements must not exceed 60 V for this substitute.

Q: Are all substitute parts available in the same package?

A: All substitutes are available in SOT-223 surface mount packages compatible with FZT758TC PCB layouts. Package designations vary slightly (SOT-223-3 versus SOT-223) but are mechanically and electrically interchangeable for the specified applications.

Q: What is the inventory status of available substitutes?

A: FZT758TA has the highest availability at 16,683 units in stock. PBHV9540Z,115 has 12,815 units available. PZT2907AT1G and PZT2907AT3G have 125,200 and 24,130 units respectively. The original FZT758TC has 784 units remaining in stock.

Q: Do all substitutes maintain RoHS3 compliance?

A: Yes. All listed substitutes are ROHS3 compliant and maintain the same environmental compliance status as the FZT758TC.

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