DZTA42-13 Equivalent & Substitute Parts

Part Overview

The DZTA42-13 is an NPN bipolar junction transistor manufactured by Diodes Incorporated, designed for general-purpose switching and amplification applications. This Surface Mount device is housed in a SOT-223-3 package and operates at a maximum collector current of 500 mA with a collector-emitter breakdown voltage of 300 V. The part is currently Active in product status with 1561 pieces in stock inventory.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the SOT-223 package family and surface mount assembly requirements.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	300	V
Vce Saturation (Max) @ Ib, Ic	500mV @ 2mA, 20mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	40 @ 30mA, 10V	—
Power - Max	1	W
Frequency - Transition	50	MHz
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-261-4, TO-261AA	—
Supplier Device Package	SOT-223-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DZTA42-13 are classified based on electrical parameter compatibility within the SOT-223 package family. The substitution logic is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (required match)
Collector-Emitter Breakdown Voltage: 300 V minimum
Maximum Collector Current: 500 mA minimum
Package / Case: TO-261-4 or TO-261AA (SOT-223 family)
Mounting Type: Surface Mount
RoHS3 Compliance and MSL Level 1

Substitute Categories:

Category 1 - Direct Electrical Equivalents (500 mA @ 300 V): Parts that match or exceed the primary electrical specifications of the DZTA42-13 with identical current and voltage ratings.

Category 2 - Reduced Current Capability (100 mA @ 300 V): Parts with lower maximum collector current but identical breakdown voltage. These are suitable for applications where the full 500 mA capability is not required.

Category 3 - Enhanced Voltage Rating (400-350 V): Parts with higher collector-emitter breakdown voltage than the DZTA42-13, providing additional voltage margin in high-voltage applications.

Parameter Comparison

Parameter	DZTA42-13	PZTA42T1G	BF720,115	BF720T1G	BSP19,115	PBHV8540Z,115	PZTA42,115
Manufacturer	Diodes Inc.	onsemi	Nexperia USA	onsemi	Nexperia USA	Nexperia USA	Nexperia USA
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Ic (Max) [mA]	500	500	100	100	100	500	100
Vce Breakdown (Max) [V]	300	300	300	300	350	400	300
Vce Saturation (Max) [mV]	500 @ 2mA, 20mA	500 @ 2mA, 20mA	600 @ 5mA, 30mA	600 @ 5mA, 30mA	500 @ 4mA, 50mA	250 @ 60mA, 300mA	500 @ 2mA, 20mA
Icbo (Max) [nA]	100	100	10	10	20	100	20
hFE (Min) @ Ic, Vce	40 @ 30mA, 10V	40 @ 30mA, 10V	50 @ 25mA, 20V	50 @ 25mA, 20V	40 @ 20mA, 10V	10 @ 300mA, 10V	40 @ 30mA, 10V
Power (Max) [W]	1.0	1.5	1.2	1.5	1.2	1.4	1.2
Frequency - Transition [MHz]	50	50	60	60	70	30	50
Operating Temperature [°C]	-65 to 150	to 150	to 150	-65 to 150	to 150	to 150	to 150
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	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 (TO-261)	SOT-223	SOT-223 (TO-261)	SOT-223	SOT-223	SOT-223
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	—	—	Automotive	—	Automotive	Automotive	Automotive
Qualification	—	—	AEC-Q101	—	AEC-Q101	AEC-Q100	AEC-Q101

Engineering Selection Recommendations

PZTA42T1G (onsemi)

The PZTA42T1G provides direct electrical equivalence to the DZTA42-13 with identical collector current (500 mA) and breakdown voltage (300 V) specifications. This part maintains the same DC current gain and saturation voltage characteristics. The PZTA42T1G offers increased power dissipation capability (1.5 W versus 1.0 W) and is suitable for applications requiring the full 500 mA current rating. This part is Active in product status with 113,300 units in stock inventory.

PBHV8540Z,115 (Nexperia USA Inc.)

The PBHV8540Z,115 is suitable for applications requiring the full 500 mA collector current with enhanced voltage margin. This part features a 400 V collector-emitter breakdown voltage, providing 100 V additional voltage headroom compared to the DZTA42-13. The part is qualified to AEC-Q100 automotive standard and carries Automotive grade designation. The PBHV8540Z,115 is Active in product status with 12,503 units in stock inventory. Note that the transition frequency is reduced to 30 MHz compared to the DZTA42-13 specification of 50 MHz.

BF720T1G (onsemi)

The BF720T1G is suitable for applications where collector current requirements do not exceed 100 mA. This part maintains the 300 V breakdown voltage and offers enhanced transition frequency (60 MHz) and power dissipation (1.5 W). The operating temperature range extends from -65°C to 150°C, matching the DZTA42-13 specification. This part is Active in product status with 4,659 units in stock inventory.

BF720,115 (Nexperia USA Inc.)

The BF720,115 is suitable for applications where collector current requirements do not exceed 100 mA. This part maintains the 300 V breakdown voltage and offers enhanced transition frequency (60 MHz). The part is qualified to AEC-Q101 automotive standard and carries Automotive grade designation. This part is Active in product status with 2,300 units in stock inventory.

BSP19,115 (Nexperia USA Inc.)

The BSP19,115 is suitable for applications where collector current requirements do not exceed 100 mA and enhanced voltage margin is required. This part features a 350 V collector-emitter breakdown voltage and offers the highest transition frequency (70 MHz) among the substitute options. The part is qualified to AEC-Q101 automotive standard and carries Automotive grade designation. This part is Active in product status with 2,200 units in stock inventory.

PZTA42,115 (Nexperia USA Inc.)

The PZTA42,115 is suitable for applications where collector current requirements do not exceed 100 mA. This part maintains the 300 V breakdown voltage and identical DC current gain and saturation voltage characteristics to the DZTA42-13. The part is qualified to AEC-Q101 automotive standard and carries Automotive grade designation. This part is Active in product status with 3,020 units in stock inventory.

Frequently Asked Questions (FAQ)

Q: Can the PZTA42T1G directly replace the DZTA42-13 in all applications?

A: The PZTA42T1G is electrically equivalent to the DZTA42-13 with matching collector current (500 mA), breakdown voltage (300 V), DC current gain, and saturation voltage specifications. Both parts are housed in the SOT-223 package family and are RoHS3 compliant with MSL Level 1. Direct substitution is supported for applications utilizing these electrical parameters.

Q: What is the primary difference between the DZTA42-13 and the reduced-current substitutes (BF720T1G, BF720,115, BSP19,115, PZTA42,115)?

A: The reduced-current substitutes are rated for a maximum collector current of 100 mA compared to the DZTA42-13 specification of 500 mA. These parts are suitable only for applications where the collector current does not exceed 100 mA. All reduced-current substitutes maintain the 300 V or higher breakdown voltage rating and are housed in the SOT-223 package family.

Q: Why would I select the PBHV8540Z,115 over the PZTA42T1G if both support 500 mA?

A: The PBHV8540Z,115 provides a 400 V collector-emitter breakdown voltage compared to the PZTA42T1G specification of 300 V. This additional 100 V margin is beneficial in high-voltage applications. The PBHV8540Z,115 is qualified to AEC-Q100 automotive standard. However, the transition frequency is reduced to 30 MHz compared to the PZTA42T1G specification of 50 MHz, making it unsuitable for high-frequency switching applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the DZTA42-13 compliance status.

Q: What is the significance of the AEC-Q101 and AEC-Q100 qualifications on some substitute parts?

A: AEC-Q101 and AEC-Q100 are automotive industry qualification standards. Parts carrying these designations have undergone additional reliability testing and are suitable for automotive applications. The DZTA42-13 does not carry these qualifications. Substitutes with automotive qualifications (BF720,115, BSP19,115, PBHV8540Z,115, PZTA42,115) are suitable for automotive-grade applications.

Q: Can I use a reduced-current substitute (100 mA rated) in an application designed for the DZTA42-13 (500 mA rated)?

A: Reduced-current substitutes are suitable only if the actual application collector current does not exceed 100 mA. The circuit design must be reviewed to confirm that the maximum collector current requirement is within the 100 mA limit of the substitute part. Exceeding this rating will result in device failure.

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

A: Both designations refer to the same physical package family (TO-261-4, TO-261AA). The SOT-223-3 designation indicates a 3-pin configuration, while SOT-223 is the general package family designation. All substitute parts are compatible with the same PCB footprint and assembly process as the DZTA42-13.

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

A: The BSP19,115 offers the highest transition frequency at 70 MHz, followed by the BF720T1G and BF720,115 at 60 MHz. The DZTA42-13 and PZTA42T1G are rated at 50 MHz, while the PBHV8540Z,115 is rated at 30 MHz. Selection should be based on the specific frequency requirements of the application.

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