FZT489TC Equivalent & Substitute Parts

Part Overview

The FZT489TC is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-223-3 package. This device operates at a maximum collector current of 1 A, collector-emitter breakdown voltage of 30 V, and maximum power dissipation of 2 W. The FZT489TC is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Transistor Type	NPN
Current - Collector (Ic) (Max)	1 A
Voltage - Collector Emitter Breakdown (Max)	30 V
Vce Saturation (Max)	600 mV @ 200 mA, 2 A
Current - Collector Cutoff (Max)	100 nA
DC Current Gain (hFE) (Min)	100 @ 1 A, 2 V
Power - Max	2 W
Frequency - Transition	150 MHz
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 FZT489TC is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor Type: NPN configuration required
Voltage - Collector Emitter Breakdown (Max): 30 V minimum
Power - Max: 2 W minimum
Operating Temperature Range: -55°C ~ 150°C (TJ) minimum
Current - Collector (Ic) (Max): 1 A minimum

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case: TO-261-4, TO-261AA
Supplier Device Package: SOT-223 or SOT-223-3

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must meet or exceed all electrical parameters while maintaining identical mechanical packaging and compliance certifications. Parts with higher current ratings, improved saturation characteristics, or enhanced frequency response are acceptable provided all minimum specifications are satisfied.

Parameter Comparison

Parameter	FZT489TC	FZT489TA	PBSS303NZ,135	PBSS4032NZ,115
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	Nexperia USA Inc.
Product Status	Obsolete	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	1 A	1 A	5.5 A	4.9 A
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V	30 V
Vce Saturation (Max)	600 mV @ 200 mA, 2 A	600 mV @ 200 mA, 2 A	240 mV @ 275 mA, 5.5 A	340 mV @ 270 mA, 5.4 A
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA	100 nA
DC Current Gain (hFE) (Min)	100 @ 1 A, 2 V	100 @ 1 A, 2 V	250 @ 2 A, 2 V	250 @ 2 A, 2 V
Power - Max	2 W	2 W	2 W	2 W
Frequency - Transition	150 MHz	150 MHz	130 MHz	145 MHz
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-3	SOT-223-3	SOT-223	SOT-223
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Standard	Standard	Automotive	Automotive
Qualification	None Listed	None Listed	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

FZT489TA (Parametric Equivalent)

The FZT489TA is the direct parametric equivalent to the FZT489TC, manufactured by Diodes Incorporated. This part maintains identical electrical specifications including 1 A maximum collector current, 30 V breakdown voltage, 150 MHz transition frequency, and 2 W power dissipation. The FZT489TA is classified as Active product status, ensuring long-term availability and supply chain continuity. Both parts share the same base product number (FZT489) and are differentiated only by packaging configuration (FZT489TA supplied in Tape & Reel format versus FZT489TC in standard packaging). This substitution is direct and requires no circuit redesign.

PBSS303NZ,135 (Manufacturer Recommended Substitute)

The PBSS303NZ,135 is manufactured by Nexperia USA Inc. and exceeds the electrical requirements of the FZT489TC. This device provides 5.5 A maximum collector current (5.5× the original specification), improved saturation characteristics (240 mV versus 600 mV), and higher DC current gain (250 versus 100). The PBSS303NZ,135 maintains the 30 V breakdown voltage, 2 W power dissipation, and SOT-223 package compatibility. This part carries AEC-Q100 automotive qualification and is classified as Active. The higher current rating and improved performance characteristics make this suitable for applications requiring enhanced thermal margin or increased current capacity within the same package envelope.

PBSS4032NZ,115 (Manufacturer Recommended Substitute)

The PBSS4032NZ,115 is manufactured by Nexperia USA Inc. and provides 4.9 A maximum collector current with 145 MHz transition frequency, closely matching the original 150 MHz specification. This device delivers improved saturation performance (340 mV versus 600 mV) and higher DC current gain (250 versus 100). The PBSS4032NZ,115 maintains 30 V breakdown voltage, 2 W power dissipation, and SOT-223 package compatibility. This part carries AEC-Q100 automotive qualification and is classified as Active. The frequency response and current rating make this suitable for high-speed switching applications requiring performance enhancement over the original FZT489TC.

Frequently Asked Questions (FAQ)

Q: Can FZT489TA directly replace FZT489TC in existing designs?

A: Yes. The FZT489TA is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel versus standard packaging). No circuit modifications are required for direct substitution.

Q: What are the advantages of using PBSS303NZ,135 or PBSS4032NZ,115 over FZT489TA?

A: Both Nexperia parts provide higher maximum collector current (5.5 A and 4.9 A respectively versus 1 A), lower saturation voltage, and higher DC current gain. These characteristics reduce power dissipation and improve switching performance. Both parts carry AEC-Q100 automotive qualification, providing enhanced reliability documentation.

Q: Are the Nexperia substitutes pin-compatible with the original FZT489TC?

A: Yes. All substitute parts use the same TO-261-4 and TO-261AA package configurations with identical pin assignments. The SOT-223 package footprint is compatible with SOT-223-3 designs.

Q: What is the difference between SOT-223 and SOT-223-3 packages?

A: Both designations refer to the same physical package. SOT-223-3 explicitly indicates a 3-pin configuration, while SOT-223 is the general package family designation. All parts listed are mechanically and electrically compatible.

Q: Do the substitute parts meet RoHS and MSL requirements?

A: Yes. All substitute parts (FZT489TA, PBSS303NZ,135, and PBSS4032NZ,115) are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original FZT489TC specifications.

Q: Why is the FZT489TC classified as obsolete?

A: The FZT489TC is obsolete due to manufacturer discontinuation. The FZT489TA remains in active production as the direct replacement. The Nexperia alternatives (PBSS303NZ,135 and PBSS4032NZ,115) provide enhanced performance options for new designs.

Q: Can I use PBSS303NZ,135 or PBSS4032NZ,115 in applications designed for 1 A maximum current?

A: Yes. Both parts are rated for higher current capacity and will operate safely in circuits designed for 1 A. The higher current rating provides additional design margin and thermal headroom without requiring circuit modifications.

Q: What is AEC-Q100 qualification?

A: AEC-Q100 is an automotive industry standard qualification that certifies component reliability for automotive applications. Both Nexperia substitutes carry this qualification, indicating enhanced testing and quality assurance suitable for automotive and mission-critical applications.

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