DZT751-13 Equivalent & Substitute Parts

Part Overview

The DZT751-13 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 60 V collector-emitter breakdown voltage and 3 A maximum collector current in a surface mount SOT-223-3 package. This device is classified as obsolete, necessitating identification of active alternative components that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Transistor Type	PNP
Voltage - Collector Emitter Breakdown (Max)	60 V
Current - Collector (Ic) (Max)	3 A
Power - Max	1 W
Frequency - Transition	145 MHz
Vce Saturation (Max) @ Ib, Ic	600 mV @ 300 mA, 3 A
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 500 mA, 2 V
Operating Temperature Range	-55°C to 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 DZT751-13 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): 60 V minimum
Current - Collector (Ic) (Max): 3 A minimum
Mounting Type: Surface Mount
Package / Case: TO-261-4, TO-261AA compatible
Operating Temperature Range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Vce Saturation characteristics
DC Current Gain (hFE) specifications
Frequency - Transition rating
Power dissipation capability
RoHS and environmental compliance

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with active product status) and Functional Alternatives (meeting primary electrical requirements with potential derating in secondary parameters or application-specific limitations).

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max)	Voltage (Max)	Power (Max)	Frequency	Vce Sat @ 300mA, 3A	hFE @ 500mA, 2V	Package	Temp Range
DZT751-13	Diodes Incorporated	Obsolete	3 A	60 V	1 W	145 MHz	600 mV	100	SOT-223-3	-55 to 150°C
FZT751QTA	Diodes Incorporated	Active	3 A	60 V	3 W	140 MHz	600 mV	100	SOT-223-3	-55 to 150°C
FZT751TA	Diodes Incorporated	Active	3 A	60 V	2 W	140 MHz	600 mV	100	SOT-223-3	-55 to 150°C
NZT660A	onsemi	Active	3 A	60 V	2 W	75 MHz	500 mV	250	SOT-223-4	-55 to 150°C
NZT660	Fairchild Semiconductor	Active	3 A	60 V	2 W	75 MHz	550 mV	100	SOT-223-4	-55 to 150°C
NZT751	Fairchild Semiconductor	Active	4 A	60 V	1.2 W	75 MHz	500 mV @ 200mA, 2A	40	SOT-223-4	-55 to 150°C
BCP52,135	Nexperia USA Inc.	Active	1 A	60 V	1 W	145 MHz	500 mV @ 50mA, 500mA	63	SOT-223	-55 to 150°C
BCP52-10,135	Nexperia USA Inc.	Active	1 A	60 V	1.3 W	145 MHz	500 mV @ 50mA, 500mA	63	SOT-223	-55 to 150°C
BCP52-16,115	Nexperia USA Inc.	Active	1 A	60 V	1 W	145 MHz	500 mV @ 50mA, 500mA	100	SOT-223	-55 to 150°C
BSP31,115	NXP USA Inc.	Active	1 A	60 V	1.3 W	100 MHz	500 mV @ 50mA, 500mA	100	SOT-223	-55 to 150°C
NSS60600MZ4T1G	onsemi	Active	6 A	60 V	800 mW	100 MHz	350 mV @ 600mA, 6A	120	SOT-223 (TO-261)	-55 to 150°C

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Recommended Primary Substitutes):

The FZT751QTA and FZT751TA from Diodes Incorporated provide the closest electrical and mechanical equivalence to the DZT751-13. Both devices maintain the 3 A collector current rating, 60 V breakdown voltage, and SOT-223-3 package configuration. FZT751QTA offers enhanced power dissipation (3 W versus 1 W), while FZT751TA provides 2 W capability. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. These parts are suitable for direct board-level substitution without circuit redesign.

Tier 2 - Functional Alternatives (3 A Current Rating):

The NZT660A and NZT660 from onsemi and Fairchild Semiconductor respectively maintain the 3 A collector current and 60 V voltage specifications. Both use SOT-223-4 packaging and operate across the required temperature range. NZT660A exhibits superior DC current gain (250 versus 100) and lower saturation voltage (500 mV versus 600 mV), offering improved switching characteristics. NZT751 from Fairchild provides 4 A capability with 1.2 W power rating, suitable for applications requiring higher current capacity.

Tier 3 - Current-Limited Alternatives (1 A Rating):

The BCP52 series (BCP52,135, BCP52-10,135, BCP52-16,115) and BSP31,115 from Nexperia and NXP are rated for 1 A maximum collector current. These devices are suitable only for applications where the circuit design permits operation at reduced current levels. BCP52-16,115 provides matching DC current gain (100) and frequency response (145 MHz) to the original part. All BCP52 variants carry AEC-Q100 automotive qualification.

Tier 4 - High-Current Alternative:

The NSS60600MZ4T1G from onsemi provides 6 A capability with 60 V rating, suitable for applications requiring higher current handling. This device operates at lower frequency (100 MHz) and exhibits reduced saturation voltage (350 mV), making it appropriate for power-switching applications where the original 145 MHz frequency is not required.

Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with modern manufacturing processes. Temperature operating range (-55°C to 150°C) is consistent across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can FZT751TA directly replace DZT751-13 on existing PCBs?

A: Yes. FZT751TA maintains identical electrical ratings (3 A, 60 V, 600 mV saturation voltage, 100 hFE) and uses the same SOT-223-3 package. The 2 W power rating exceeds the original 1 W specification, providing additional thermal margin. No circuit modifications are required.

Q: What is the difference between FZT751QTA and FZT751TA?

A: Both parts are manufactured by Diodes Incorporated and share identical electrical specifications. The primary difference is power dissipation capability: FZT751QTA is rated for 3 W while FZT751TA is rated for 2 W. FZT751QTA is supplied in Tape & Reel packaging, while FZT751TA is available in Cut Tape & Digi-Reel format. Selection depends on packaging requirements and thermal design margins.

Q: Why are NZT660 and NZT660A listed as separate alternatives?

A: NZT660 is manufactured by Fairchild Semiconductor with 100 hFE minimum gain and 550 mV saturation voltage. NZT660A is manufactured by onsemi with 250 hFE minimum gain and 500 mV saturation voltage. Both maintain 3 A and 60 V ratings. NZT660A offers superior switching performance due to higher gain and lower saturation voltage. Both use SOT-223-4 packaging.

Q: Can BCP52 series parts substitute for DZT751-13 in all applications?

A: No. BCP52 series devices are rated for maximum 1 A collector current, compared to 3 A for the DZT751-13. These parts are suitable only for circuits designed to operate at 1 A or lower. Applications requiring the full 3 A capability must use FZT751 series, NZT660 series, or NSS60600MZ4T1G alternatives.

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

A: SOT-223-3 contains three leads (Base, Collector, Emitter), while SOT-223-4 includes an additional lead for thermal connection. Both packages are mechanically compatible with TO-261-4 and TO-261AA footprints. SOT-223-4 variants (NZT660, NZT660A, NZT751) provide improved thermal performance through the additional lead connection.

Q: Are automotive-grade alternatives available?

A: Yes. The BCP52 series (BCP52,135, BCP52-10,135, BCP52-16,115) carries AEC-Q100 automotive qualification from Nexperia. These parts are suitable for automotive applications requiring qualified components. However, they are limited to 1 A operation and require circuit derating compared to the original 3 A specification.

Q: What is the inventory status of substitute parts?

A: FZT751TA has the highest inventory (43,800 pcs), followed by NZT660 (69,100 pcs) and NSS60600MZ4T1G (25,200 pcs). FZT751QTA (10,100 pcs) and NZT660A (20,127 pcs) maintain adequate stock levels. BCP52 variants show lower availability (2,100 to 12,300 pcs). Inventory levels should be verified with suppliers for production planning.

Q: Can NSS60600MZ4T1G be used as a direct replacement?

A: NSS60600MZ4T1G provides 6 A capability and 60 V rating, exceeding the original 3 A specification. However, it operates at 100 MHz frequency (versus 145 MHz) and exhibits 350 mV saturation voltage (versus 600 mV). This device is suitable for power-switching applications where frequency requirements are lower and improved saturation characteristics are beneficial. Circuit validation is required for frequency-dependent applications.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance and carry unlimited moisture sensitivity rating (MSL 1). Operating temperature range (-55°C to 150°C) is consistent across all alternatives. REACH status is unaffected for all parts. ECCN classification is EAR99 for all devices except NSS60600MZ4T1G (HTSUS 8541.21.0075 versus 8541.29.0075 for others).

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