FZT788BTC Equivalent & Substitute Parts

Part Overview

The FZT788BTC is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-223-3 package. This device is rated for 15 V collector-emitter breakdown voltage, 3 A maximum collector current, and 2 W maximum power dissipation. The FZT788BTC is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	3 A
Voltage - Collector Emitter Breakdown (Max)	15 V
Power - Max	2 W
Frequency - Transition	100 MHz
DC Current Gain (hFE) (Min)	500 @ 10mA, 2V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SOT-223-3 (TO-261-4, TO-261AA)

Substitute Part Grouping Explanation

Substitution of the FZT788BTC is determined by the following critical parameters: transistor type (PNP), mounting type (surface mount), package compatibility (SOT-223-3), and electrical ratings including maximum collector current, collector-emitter breakdown voltage, power dissipation, and DC current gain.

The substitute parts are grouped into two categories:

Parametric Equivalent: FZT788BTA matches all electrical specifications and package requirements of the FZT788BTC. This part is manufactured by the same supplier (Diodes Incorporated) and maintains identical ratings across all critical parameters.

Manufacturer Recommended Substitutes: PZT2907AT1G and PZT2907AT3G are onsemi PNP transistors in SOT-223 packaging. These parts differ in maximum collector current (600 mA versus 3 A), collector-emitter breakdown voltage (60 V versus 15 V), and power dissipation (1.5 W versus 2 W). These differences establish them as suitable substitutes only for applications where the lower current and power ratings are acceptable and the higher voltage rating provides design margin.

Parameter Comparison

Parameter	FZT788BTC	FZT788BTA	PZT2907AT1G	PZT2907AT3G
Manufacturer	Diodes Incorporated	Diodes Incorporated	onsemi	onsemi
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	3 A	3 A	600 mA	600 mA
Voltage - Collector Emitter Breakdown (Max)	15 V	15 V	60 V	60 V
Power - Max	2 W	2 W	1.5 W	1.5 W
Frequency - Transition	100 MHz	100 MHz	200 MHz	200 MHz
DC Current Gain (hFE) (Min)	500 @ 10mA, 2V	500 @ 10mA, 2V	100 @ 150mA, 10V	100 @ 150mA, 10V
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-223-3	SOT-223-3	SOT-223 (TO-261)	SOT-223 (TO-261)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FZT788BTA is the direct parametric equivalent for the obsolete FZT788BTC. This part is manufactured by Diodes Incorporated and maintains identical electrical specifications, package configuration, and compliance certifications. The FZT788BTA is classified as active product status with significantly higher inventory availability (52,300 pcs), making it the primary replacement for existing FZT788BTC applications. Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications.

PZT2907AT1G and PZT2907AT3G are manufacturer-recommended alternatives from onsemi. These parts are suitable for applications where the design specifications permit operation within reduced current and power ratings. The PZT2907 series provides higher collector-emitter breakdown voltage (60 V), which offers additional design margin in voltage-sensitive applications. Both variants are active products with ROHS3 compliance. The selection between AT1G (Cut Tape & Digi-Reel packaging) and AT3G (Tape & Reel packaging) depends on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can FZT788BTA directly replace FZT788BTC without circuit modification?

A: Yes. FZT788BTA is a parametric equivalent with identical electrical specifications, package configuration, and operating temperature range. Direct substitution is supported for all applications currently using FZT788BTC.

Q: What are the limitations when using PZT2907AT1G or PZT2907AT3G as substitutes?

A: The PZT2907 series has a maximum collector current of 600 mA compared to 3 A for the FZT788BTC. Applications requiring collector currents exceeding 600 mA cannot use these parts. Additionally, maximum power dissipation is 1.5 W versus 2 W. The higher collector-emitter breakdown voltage (60 V) is not a limitation but provides additional voltage margin.

Q: Are there packaging differences between the substitute parts?

A: All parts use SOT-223 surface mount packaging with compatible TO-261-4 and TO-261AA case designations. FZT788BTA is supplied in Cut Tape packaging, while PZT2907AT1G is available in Cut Tape & Digi-Reel, and PZT2907AT3G is supplied in Tape & Reel format. These packaging differences affect procurement and assembly processes but not electrical compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed are ROHS3 compliant and carry EAR99 ECCN classification. FZT788BTA is REACH Unaffected, while FZT788BTC is REACH Affected. PZT2907AT1G and PZT2907AT3G are both REACH Unaffected. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: Which substitute part should be selected for new designs?

A: FZT788BTA is recommended for new designs requiring direct electrical equivalence to the FZT788BTC. For applications with lower current requirements (≤600 mA), PZT2907AT1G or PZT2907AT3G provide active product status with established supply chains and additional voltage rating margin.

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