DZT951-13 Equivalent & Substitute Parts

Part Overview

The DZT951-13 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 60 V collector-emitter breakdown voltage and 5 A maximum collector current in a surface mount SOT-223-3 package. This device is classified as obsolete, indicating discontinuation from active production. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor topology.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	5	A
Power - Max	1	W
Frequency - Transition	120	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 2A, 1V	—
Vce Saturation (Max) @ Ib, Ic	460mV @ 500mA, 5A	—
Current - Collector Cutoff (Max)	50	nA
Operating Temperature Range	-55 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 (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DZT951-13 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be PNP
Collector-emitter breakdown voltage must be 60 V or greater
Maximum collector current must be 5 A or greater
Transition frequency must be 120 MHz or greater
DC current gain (hFE) must be 100 or greater at specified test conditions
Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

Package must be SOT-223-3 or equivalent TO-261-4/TO-261AA footprint
Surface mount mounting type required

Compliance Criteria:

RoHS3 compliance required
MSL rating of 1 (Unlimited) preferred

Substitute parts are categorized into two groups:

Direct Substitutes (Diodes Incorporated): Parts meeting or exceeding all electrical parameters with identical or superior power ratings and active product status.

Similar Substitutes (Alternative Manufacturers): Parts meeting core electrical parameters with potential variations in secondary characteristics such as saturation voltage, cutoff current, or power dissipation. These require design verification for specific application constraints.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) [A]	Vce Breakdown (Max) [V]	Power (Max) [W]	Frequency [MHz]	hFE (Min)	Vce Sat (Max) [mV]	Package	RoHS3
DZT951-13	Diodes Incorporated	Obsolete	5	60	1	120	100	460	SOT-223-3	Yes
FZT951TA	Diodes Incorporated	Active	5	60	3	120	100	460	SOT-223-3	Yes
ZXTP2012GTA	Diodes Incorporated	Active	5.5	60	3	120	100	250	SOT-223-3	Yes
ZX5T951GTA	Diodes Incorporated	Active	5.5	60	3	120	100	250	SOT-223-3	Yes
BSP31,115	NXP USA Inc.	Active	1	60	1.3	100	100	500	SOT-223	Not Specified
NZT751	Fairchild Semiconductor	Active	4	60	1.2	75	40	500	SOT-223-4	Not Specified
BCP52,135	Nexperia USA Inc.	Active	1	60	1	145	63	500	SOT-223	Yes
BCP52-10,135	Nexperia USA Inc.	Active	1	60	1.3	145	63	500	SOT-223	Yes
BCP52-16,115	Nexperia USA Inc.	Active	1	60	1	145	100	500	SOT-223	Yes
BCP5216H6327XTSA1	Infineon Technologies	Last Time Buy	1	60	2	125	100	500	SOT-223-4	Yes

Engineering Selection Recommendations

Primary Recommendation: FZT951TA

The FZT951TA from Diodes Incorporated is the optimal direct substitute for the DZT951-13. This part maintains identical electrical specifications across all critical parameters: 5 A maximum collector current, 60 V breakdown voltage, 120 MHz transition frequency, and 100 minimum hFE. The FZT951TA offers enhanced power dissipation capability (3 W versus 1 W), providing additional thermal margin in applications. Active product status ensures long-term supply availability. RoHS3 compliance and MSL-1 rating match the original specification. Packaging is identical SOT-223-3 with TO-261-4/TO-261AA footprint compatibility.

Secondary Recommendation: ZXTP2012GTA or ZX5T951GTA

Both ZXTP2012GTA and ZX5T951GTA from Diodes Incorporated provide enhanced electrical performance with 5.5 A maximum collector current and improved saturation characteristics (250 mV versus 460 mV). These parts maintain 60 V breakdown voltage, 120 MHz transition frequency, and 100 minimum hFE. Active product status and RoHS3 compliance are confirmed. Packaging compatibility is maintained. These substitutes are suitable for applications where improved saturation performance or higher current margin is beneficial.

Alternative Consideration: BCP52-16,115

The BCP52-16,115 from Nexperia USA Inc. is an active product with RoHS3 compliance and automotive-grade qualification (AEC-Q100). However, this part is limited to 1 A maximum collector current, making it unsuitable for applications requiring the full 5 A capability of the DZT951-13. This substitute is applicable only to designs where collector current does not exceed 1 A.

Not Recommended: BSP31,115, NZT751, BCP52,135, BCP52-10,135, BCP5216H6327XTSA1

These alternatives present significant limitations:

BSP31,115 and all BCP52 variants are rated for maximum 1 A collector current, insufficient for 5 A applications
NZT751 exhibits reduced DC current gain (40 versus 100) and lower transition frequency (75 MHz versus 120 MHz)
BCP5216H6327XTSA1 carries Last Time Buy status, indicating imminent discontinuation
These parts do not provide functional equivalence for applications requiring 5 A operation

Frequently Asked Questions (FAQ)

Q: Can the FZT951TA directly replace the DZT951-13 without circuit modification?

A: Yes. The FZT951TA maintains identical electrical specifications for collector current (5 A), breakdown voltage (60 V), transition frequency (120 MHz), and DC current gain (100 minimum). Saturation voltage is identical at 460 mV. Package footprint is SOT-223-3, matching the original. No circuit modification is required.

Q: What is the significance of the power rating difference between DZT951-13 (1 W) and FZT951TA (3 W)?

A: The FZT951TA provides enhanced thermal dissipation capability. In applications where the DZT951-13 operated near its 1 W thermal limit, the FZT951TA offers additional margin. This does not require circuit changes; it represents improved reliability through reduced junction temperature at equivalent power levels.

Q: Are ZXTP2012GTA and ZX5T951GTA interchangeable with FZT951TA?

A: Both parts are electrically compatible with the DZT951-13 and FZT951TA for applications requiring 5 A or less collector current. The primary difference is improved saturation voltage (250 mV versus 460 mV), which reduces power dissipation in saturated switching applications. Selection between these three parts depends on specific application requirements for saturation performance and thermal management.

Q: Why are BCP52 variants not suitable substitutes despite active product status?

A: BCP52 variants are rated for maximum 1 A collector current, while the DZT951-13 is rated for 5 A. These parts cannot support the full current capability of the original design. Use of BCP52 variants in 5 A applications would result in device overstress and failure.

Q: Is RoHS3 compliance mandatory for substitute selection?

A: RoHS3 compliance is specified for the DZT951-13 and is a required parameter for equivalent substitutes in applications subject to RoHS regulations. FZT951TA, ZXTP2012GTA, and ZX5T951GTA all maintain RoHS3 compliance. Alternative manufacturers' parts should be verified for compliance status before selection.

Q: What is the difference between SOT-223-3 and SOT-223-4 packaging?

A: SOT-223-3 contains three leads (base, collector, emitter), while SOT-223-4 contains four leads with an additional thermal pad. Both are surface mount packages with similar footprints. Verify PCB layout compatibility before substituting between these variants. The DZT951-13 specifies SOT-223-3; direct substitutes maintain this package type.

Q: Can NZT751 be used as a substitute in lower-current applications?

A: NZT751 is limited to 4 A maximum collector current and exhibits reduced DC current gain (40 versus 100 minimum). While it meets the 60 V breakdown voltage requirement, the lower gain and current rating make it unsuitable as a general substitute. Use only in applications where collector current does not exceed 4 A and where the reduced gain is acceptable.

Q: What does "Last Time Buy" status mean for BCP5216H6327XTSA1?

A: Last Time Buy status indicates the manufacturer has announced discontinuation and is accepting final orders before production ends. This part should not be selected for new designs or long-term production requirements. Existing inventory may be available for limited periods only.

Q: Are there any thermal management differences between substitute options?

A: FZT951TA, ZXTP2012GTA, and ZX5T951GTA all provide 3 W power dissipation capability, superior to the original 1 W rating. This allows operation at lower junction temperatures for equivalent power levels. BCP52 variants and other alternatives provide 1 W to 2 W ratings. Thermal design should account for these differences when selecting substitutes for high-power applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message