FZT558TC Equivalent & Substitute Parts

Part Overview

The FZT558TC is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 400 V collector-emitter breakdown voltage and 200 mA maximum collector current in a surface mount SOT-223-3 package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The FZT558TC serves in applications requiring high-voltage PNP switching and amplification with moderate current handling capability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	400	V
Current - Collector (Ic) (Max)	200	mA
Vce Saturation (Max)	500	mV @ 6mA, 50mA
DC Current Gain (hFE) (Min)	100	@ 50mA, 10V
Power - Max	2	W
Frequency - Transition	50	MHz
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SOT-223-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the FZT558TC is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): ≥ 400 V
Current - Collector (Ic) (Max): ≥ 200 mA
Package / Case: SOT-223-3 or equivalent surface mount package
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): ≤ 1

Secondary Compatibility Parameters:

Vce Saturation (Max): ≤ 500 mV
DC Current Gain (hFE) (Min): ≥ 100
Operating Temperature Range: Must encompass -55°C to 150°C

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalent (Identical Electrical Specifications): FZT558TA meets all primary and secondary criteria with identical electrical performance and active product status.

Category 2 - Functional Substitutes (Enhanced or Variant Specifications): PBHV9540Z,115, PZT2907AT1G, PZT2907AT3G, and TSA874CW RPG provide functional substitution with variations in collector current, voltage rating, or frequency response. These parts maintain SOT-223 package compatibility and surface mount configuration while offering alternative performance characteristics suitable for specific application requirements.

Parameter Comparison

Parameter	FZT558TC (Main)	FZT558TA	PBHV9540Z,115	PZT2907AT1G	PZT2907AT3G	TSA874CW RPG
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	onsemi	onsemi	Taiwan Semiconductor Corporation
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V	60 V	60 V	500 V
Current - Collector (Ic) (Max)	200 mA	200 mA	500 mA	600 mA	600 mA	150 mA
Vce Saturation (Max)	500 mV @ 6mA, 50mA	500 mV @ 6mA, 50mA	320 mV @ 100mA, 500mA	1.6 V @ 50mA, 500mA	1.6 V @ 50mA, 500mA	500 mV @ 10mA, 50mA
DC Current Gain (hFE) (Min)	100 @ 50mA, 10V	100 @ 50mA, 10V	80 @ 300mA, 10V	100 @ 150mA, 10V	100 @ 150mA, 10V	150 @ 10mA, 10V
Power - Max	2 W	2 W	1.45 W	1.5 W	1.5 W	1 W
Frequency - Transition	50 MHz	50 MHz	30 MHz	200 MHz	200 MHz	50 MHz
Operating Temperature	-55 to 150 °C (TJ)	-55 to 150 °C (TJ)	150 °C (TJ)	-65 to 150 °C (TJ)	-65 to 150 °C (TJ)	150 °C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-223-3	SOT-223-3	SOT-223	SOT-223 (TO-261)	SOT-223 (TO-261)	SOT-223
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

FZT558TA (Diodes Incorporated)

FZT558TA is the direct parametric equivalent to FZT558TC with identical electrical specifications across all key parameters. This part maintains active product status, ensuring long-term availability and supply chain stability. FZT558TA is REACH Unaffected, providing regulatory advantage over the obsolete FZT558TC. Packaging is Tape & Reel (TR), suitable for automated assembly. This part is the primary recommendation for direct replacement in existing designs.

PBHV9540Z,115 (Nexperia USA Inc.)

PBHV9540Z,115 provides functional substitution with enhanced collector current capability (500 mA versus 200 mA) while maintaining 400 V voltage rating. This part carries AEC-Q100 automotive qualification and is suitable for applications requiring higher current handling. Operating temperature maximum is specified at 150°C (TJ) without lower temperature specification. Power dissipation is reduced to 1.45 W. Transition frequency is 30 MHz, lower than the FZT558TC. This part is suitable for high-current applications within the 400 V voltage class.

PZT2907AT1G and PZT2907AT3G (onsemi)

Both PZT2907 variants offer significantly enhanced collector current (600 mA) and transition frequency (200 MHz) with reduced voltage rating (60 V). These parts are suitable for lower-voltage, higher-frequency applications. Operating temperature range extends to -65°C minimum. PZT2907AT1G is packaged in Cut Tape (CT) & Digi-Reel®, while PZT2907AT3G is Tape & Reel (TR). These parts are not suitable for 400 V applications and should be selected only when voltage requirements are 60 V or lower.

TSA874CW RPG (Taiwan Semiconductor Corporation)

TSA874CW RPG provides substitution with enhanced voltage rating (500 V) and reduced collector current (150 mA). This part maintains 50 MHz transition frequency matching the FZT558TC. Moisture Sensitivity Level is 3 (168 Hours), requiring controlled storage conditions compared to MSL 1 of the main part. Power dissipation is reduced to 1 W. This part is suitable for high-voltage, lower-current applications exceeding 400 V requirements.

Frequently Asked Questions (FAQ)

Q: Can FZT558TA be used as a direct replacement for FZT558TC?

A: Yes. FZT558TA is a parametric equivalent with identical electrical specifications, operating temperature range, and package configuration. The primary difference is product status (Active versus Obsolete) and REACH compliance status. FZT558TA is the recommended direct replacement.

Q: What is the key difference between FZT558TC and PBHV9540Z,115?

A: PBHV9540Z,115 supports higher collector current (500 mA versus 200 mA) while maintaining the same 400 V voltage rating. Transition frequency is reduced to 30 MHz, and power dissipation is lower at 1.45 W. Selection depends on whether the application requires the higher current capability.

Q: Can PZT2907AT1G or PZT2907AT3G replace FZT558TC in a 400 V application?

A: No. PZT2907 variants are rated for maximum 60 V collector-emitter breakdown voltage. These parts are not suitable for 400 V applications. They should be selected only for designs operating at 60 V or lower.

Q: What is the difference between PZT2907AT1G and PZT2907AT3G?

A: Both parts have identical electrical specifications. The difference is packaging: PZT2907AT1G is supplied in Cut Tape (CT) & Digi-Reel®, while PZT2907AT3G is supplied in Tape & Reel (TR). Selection depends on assembly equipment compatibility and procurement requirements.

Q: Is TSA874CW RPG suitable for applications requiring 400 V operation?

A: TSA874CW RPG is rated for 500 V collector-emitter breakdown voltage, exceeding the 400 V requirement. However, collector current is limited to 150 mA, lower than the FZT558TC specification of 200 mA. This part is suitable for high-voltage, lower-current applications. Moisture Sensitivity Level is 3, requiring controlled storage conditions.

Q: What are the package compatibility considerations for these substitute parts?

A: All substitute parts use SOT-223 or SOT-223-3 surface mount packages with TO-261-4 or TO-261AA case designations. Physical footprints are compatible for PCB assembly. Verify specific package variant requirements with component datasheets before design implementation.

Q: Which substitute part has the best long-term availability?

A: FZT558TA, PBHV9540Z,115, PZT2907AT1G, and PZT2907AT3G all have active product status with substantial inventory levels. FZT558TA is recommended for direct replacement due to identical specifications. Alternative parts should be selected based on specific application requirements rather than availability alone.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 Compliant. FZT558TA, PBHV9540Z,115, PZT2907AT1G, PZT2907AT3G, and TSA874CW RPG meet RoHS3 requirements.

Q: What is the significance of REACH status differences?

A: FZT558TC is REACH Affected, while all substitute parts are REACH Unaffected. This indicates that substitute parts do not contain substances of very high concern (SVHC) listed under REACH regulations, providing regulatory advantage for new designs and long-term compliance.

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