FZT593TC Equivalent & Substitute Parts

Part Overview

The FZT593TC is a Surface Mount PNP Bipolar Junction Transistor manufactured by Diodes Incorporated, rated for 100V collector-emitter breakdown voltage and 1A maximum collector current. This device is classified as Obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The FZT593TC is packaged in SOT-223-3 configuration and is ROHS3 compliant with unlimited moisture sensitivity rating.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Maximum Collector Current (Ic)	1	A
Collector-Emitter Breakdown Voltage (Max)	100	V
Maximum Power Dissipation	2	W
Transition Frequency	50	MHz
DC Current Gain (hFE Min)	100	@ 500mA, 5V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package	SOT-223-3	—

Substitute Part Grouping Explanation

Substitution of the FZT593TC is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Transistor polarity (PNP)
Maximum collector current rating (1 A minimum)
Collector-emitter breakdown voltage (100 V minimum)
Surface mount packaging (SOT-223 family)
Operating temperature range (-55°C to 150°C minimum)

Secondary Compatibility Factors:

DC current gain (hFE) minimum specification
Vce saturation characteristics
Transition frequency performance
Power dissipation capability
RoHS and REACH compliance status

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (enhanced performance characteristics within the same functional class).

Parameter Comparison

Parameter	FZT593TC (Main)	FZT593TA (Equivalent)	PBSS9110Z,135 (Alternative)
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.
Product Status	Obsolete	Active	Active
Transistor Type	PNP	PNP	PNP
Ic (Max)	1 A	1 A	1 A
Vce Breakdown (Max)	100 V	100 V	100 V
Vce Saturation @ Ib, Ic	300mV @ 50mA, 500mA	300mV @ 50mA, 500mA	320mV @ 100mA, 1A
Ic Cutoff (Max)	100 nA	100 nA	100 nA
DC Current Gain (hFE Min)	100 @ 500mA, 5V	100 @ 500mA, 5V	150 @ 500mA, 5V
Power (Max)	2 W	2 W	1.4 W
Frequency - Transition	50 MHz	50 MHz	100 MHz
Operating Temperature	-55 to 150°C	-55 to 150°C	-55 to 150°C
Package	SOT-223-3	SOT-223-3	SOT-223
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected
Automotive Grade	—	—	AEC-Q100

Engineering Selection Recommendations

FZT593TA (Diodes Incorporated) is the direct parametric equivalent to the FZT593TC. This substitute maintains identical electrical specifications across all critical parameters including collector current, breakdown voltage, saturation characteristics, and DC current gain. The FZT593TA is currently in Active product status with REACH Unaffected compliance, eliminating supply chain constraints associated with the obsolete FZT593TC. Packaging is identical (SOT-223-3), enabling direct board-level substitution without layout modifications.

PBSS9110Z,135 (Nexperia USA Inc.) is a manufacturer-recommended alternative that meets or exceeds the functional requirements of the FZT593TC. This device provides enhanced performance characteristics including higher transition frequency (100 MHz versus 50 MHz) and superior DC current gain (150 minimum versus 100 minimum). The PBSS9110Z,135 carries AEC-Q100 automotive qualification and is REACH Unaffected. The maximum power dissipation is reduced to 1.4W (versus 2W), and Vce saturation is specified at higher current levels (100mA/1A versus 50mA/500mA). These differences require circuit-level evaluation for applications operating at maximum power or saturation conditions.

Selection between FZT593TA and PBSS9110Z,135 depends on application requirements: FZT593TA for direct replacement with identical specifications; PBSS9110Z,135 for designs requiring automotive qualification or enhanced frequency performance.

Frequently Asked Questions (FAQ)

Q: Can FZT593TA be used as a direct replacement for FZT593TC?

A: Yes. The FZT593TA is a parametric equivalent with identical electrical specifications across all critical parameters: 1A collector current, 100V breakdown voltage, 50MHz transition frequency, 2W power dissipation, and -55°C to 150°C operating range. Packaging is identical (SOT-223-3). No circuit modifications are required.

Q: What are the key differences between FZT593TA and PBSS9110Z,135?

A: Both devices meet the 1A/100V/50MHz baseline requirements. PBSS9110Z,135 offers higher transition frequency (100MHz), superior DC current gain (150 minimum), and AEC-Q100 automotive qualification. Maximum power dissipation is lower (1.4W versus 2W), and Vce saturation is specified at higher current levels. Applications requiring automotive-grade components or higher frequency performance should use PBSS9110Z,135.

Q: Are there packaging compatibility issues between these substitutes?

A: FZT593TC and FZT593TA use identical SOT-223-3 packaging. PBSS9110Z,135 uses SOT-223 packaging, which is mechanically and electrically compatible with SOT-223-3 for surface mount applications. All three devices are suitable for standard pick-and-place assembly processes.

Q: What is the inventory status of these substitutes?

A: FZT593TA has 19,414 pieces in stock (Active status). PBSS9110Z,135 has 23,895 pieces in stock (Active status). The original FZT593TC has 784 pieces remaining (Obsolete status). For new production, FZT593TA or PBSS9110Z,135 are recommended to ensure supply continuity.

Q: Do these substitutes have the same compliance certifications?

A: All three devices are ROHS3 compliant with MSL 1 (Unlimited) rating. FZT593TC is REACH Affected; both FZT593TA and PBSS9110Z,135 are REACH Unaffected. PBSS9110Z,135 carries additional AEC-Q100 automotive qualification. For applications requiring REACH compliance, FZT593TA or PBSS9110Z,135 are preferred.

Q: Can PBSS9110Z,135 be used in applications designed for FZT593TC?

A: PBSS9110Z,135 is functionally compatible for applications within the 1A/100V operating envelope. The enhanced transition frequency (100MHz) and higher DC current gain (150) provide performance margin. However, the reduced maximum power dissipation (1.4W versus 2W) requires verification for circuits operating near maximum power levels. Vce saturation specifications differ at higher current levels; saturation-dependent circuits should be evaluated.

Q: What is the base product number relationship?

A: FZT593TC and FZT593TA share the same base product number (FZT593), indicating they are variants within the same product family. PBSS9110Z,135 has a different base product number (PBSS9110), indicating it is a distinct product from a different manufacturer (Nexperia) that meets equivalent functional requirements.

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