NZT560 Equivalent & Substitute Parts

Part Overview

The NZT560 is an NPN bipolar junction transistor manufactured by onsemi, rated for 60 V collector-emitter breakdown voltage and 3 A maximum collector current. The device is housed in a SOT-223-4 surface mount package and is designed for general-purpose switching and amplification applications. The NZT560 maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters while maintaining compatible package footprints and thermal operating ranges. Substitution becomes necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate enhanced performance characteristics such as higher current capacity or improved frequency response.

Key Parameters

Parameter	NZT560	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	3	A
Power - Max	1	W
Frequency - Transition	75	MHz
Vce Saturation (Max) @ Ib, Ic	450 mV @ 300 mA, 3 A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 500 mA, 2 V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	TO-261-4, TO-261AA	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the NZT560 are classified into two categories based on electrical parameter alignment:

Category 1: Direct Voltage and Current Equivalents (60 V, 3 A)

Parts in this category maintain the same maximum collector-emitter breakdown voltage (60 V) and collector current rating (3 A) as the NZT560. These substitutes are suitable for applications where the original electrical specifications must be preserved without modification to circuit design. Parts include FZT651QTA and FZT651TA from Diodes Incorporated.

Category 2: Enhanced Current Capacity (60 V, ≥3 A)

Parts in this category maintain the 60 V voltage rating but provide higher maximum collector current ratings (5 A to 6 A). These substitutes are suitable for applications requiring increased current handling capability or improved thermal margin. Parts include NSS60601MZ4T1G, NSS60601MZ4T3G, PBSS304NZ,135, and STN851.

Category 3: Reduced Voltage Rating (40 V to 50 V, 3 A)

Parts in this category maintain the 3 A current rating but operate at reduced maximum collector-emitter breakdown voltages (40 V to 50 V). These substitutes are suitable only for applications where the circuit operates at voltages below the reduced rating. Parts include NSS40301MZ4T1G, NSS40301MZ4T3G, and DNLS350E-13.

Key Parameters Determining Substitution:

Collector-emitter breakdown voltage (VCEO)
Maximum collector current (Ic)
Package compatibility (SOT-223 / TO-261)
Operating temperature range (-55°C to 150°C)
Surface mount mounting type
RoHS3 compliance status

Parameter Comparison

Part Number	Manufacturer	VCEO (Max) [V]	Ic (Max) [A]	Power (Max) [W]	fT [MHz]	Vce Sat (Max) [mV]	Package	Status
NZT560	onsemi	60	3	1	75	450	SOT-223-4	Active
FZT651QTA	Diodes Inc.	60	3	3	175	600	SOT-223-3	Active
FZT651TA	Diodes Inc.	60	3	2	175	600	SOT-223-3	Active
NSS40301MZ4T1G	onsemi	40	3	2	215	200	SOT-223	Active
NSS40301MZ4T3G	onsemi	40	3	2	215	200	SOT-223	Active
NSS60601MZ4T1G	onsemi	60	6	0.8	100	300	SOT-223	Active
NSS60601MZ4T3G	onsemi	60	6	0.8	100	300	SOT-223	Active
DNLS350E-13	Diodes Inc.	50	3	1	100	290	SOT-223-3	Active
PBSS304NZ,135	Nexperia	60	5.2	2	130	280	SOT-223	Active
STN851	STMicroelectronics	60	5	1.6	130	500	SOT-223	Active

Engineering Selection Recommendations

For Direct Replacement (60 V, 3 A Rating Preservation):

FZT651TA and FZT651QTA from Diodes Incorporated provide direct electrical equivalence to the NZT560 with identical voltage and current ratings. Both devices maintain active product status and RoHS3 compliance. FZT651TA offers higher inventory availability (44,020 units) compared to FZT651QTA (17,317 units). The FZT651 series exhibits higher transition frequency (175 MHz versus 75 MHz), enabling improved high-frequency performance in switching applications. Package compatibility is maintained through TO-261-4 and TO-261AA designations.

For Enhanced Current Capacity (60 V Rating Preservation):

NSS60601MZ4T1G and NSS60601MZ4T3G from onsemi provide doubled collector current capacity (6 A versus 3 A) while maintaining the 60 V voltage rating. These devices are suitable for applications requiring increased thermal margin or higher current handling. NSS60601MZ4T1G demonstrates superior inventory availability (30,400 units). Both maintain active product status and RoHS3 compliance. The PBSS304NZ,135 from Nexperia offers 5.2 A capacity with automotive-grade qualification (AEC-Q100), suitable for automotive applications requiring enhanced reliability.

For Reduced Voltage Applications (40 V to 50 V Rating):

NSS40301MZ4T1G and NSS40301MZ4T3G from onsemi operate at 40 V maximum voltage with 3 A current capacity. These substitutes are applicable only when circuit design operates below 40 V. Both maintain active status and RoHS3 compliance. DNLS350E-13 from Diodes Incorporated provides 50 V operation with 3 A capacity, offering intermediate voltage rating between the 40 V and 60 V options.

Compliance and Certification Status:

All identified substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the NZT560 environmental qualification. FZT651QTA carries automotive-grade qualification (AEC-Q101), and PBSS304NZ,135 carries automotive-grade qualification (AEC-Q100), suitable for automotive applications requiring enhanced reliability standards.

Frequently Asked Questions (FAQ)

Q: Can NSS40301MZ4T1G replace NZT560 in all applications?

A: NSS40301MZ4T1G operates at a maximum collector-emitter breakdown voltage of 40 V, compared to the NZT560 rating of 60 V. This substitute is suitable only for applications where the circuit operates at voltages below 40 V. If the circuit design requires 60 V operation, this part is not suitable.

Q: What is the primary difference between FZT651TA and FZT651QTA?

A: Both devices provide identical electrical specifications (60 V, 3 A) and package compatibility. The primary difference is maximum power rating: FZT651QTA is rated for 3 W, while FZT651TA is rated for 2 W. FZT651TA offers significantly higher inventory availability (44,020 units versus 17,317 units).

Q: Are NSS60601MZ4T1G and NSS60601MZ4T3G interchangeable?

A: NSS60601MZ4T1G and NSS60601MZ4T3G provide identical electrical specifications and package compatibility. The primary difference is packaging format: NSS60601MZ4T1G is supplied in Cut Tape and Digi-Reel format, while NSS60601MZ4T3G is supplied in Tape & Reel format. NSS60601MZ4T1G offers higher inventory availability (30,400 units versus 1,600 units).

Q: Can I use STN851 as a direct replacement for NZT560?

A: STN851 maintains the 60 V voltage rating but provides enhanced current capacity (5 A versus 3 A). The device is electrically compatible and maintains package compatibility through TO-261-4 and TO-261AA designations. STN851 is suitable for applications where increased current handling or thermal margin is beneficial.

Q: What is the significance of the SOT-223-4 versus SOT-223-3 package designation?

A: Both SOT-223-4 and SOT-223-3 packages are compatible with TO-261-4 and TO-261AA footprints. The designation difference reflects internal pin configuration. All identified substitute parts maintain compatible surface mount footprints suitable for direct PCB replacement.

Q: Which substitute part offers the best high-frequency performance?

A: FZT651TA and FZT651QTA from Diodes Incorporated provide the highest transition frequency (175 MHz) compared to the NZT560 (75 MHz). These devices are suitable for applications requiring improved high-frequency switching performance.

Q: Are all substitute parts RoHS3 compliant?

A: All identified substitute parts maintain RoHS3 compliance status, matching the NZT560 environmental qualification. All devices also maintain unlimited moisture sensitivity rating (MSL 1).

Q: Which substitute part is recommended for automotive applications?

A: PBSS304NZ,135 from Nexperia carries automotive-grade qualification (AEC-Q100) and FZT651QTA from Diodes Incorporated carries automotive-grade qualification (AEC-Q101). Both devices are suitable for automotive applications requiring enhanced reliability standards.

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