DZT591C-13 Equivalent & Substitute Parts

Part Overview

The DZT591C-13 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 60 V collector-emitter breakdown voltage and 1 A maximum collector current. The device is housed in a SOT-223-3 surface mount package and operates across a temperature range of -55°C to 150°C. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Ic) Maximum	1	A
Collector-Emitter Breakdown Voltage (Max)	60	V
Vce Saturation @ Ib, Ic	600 mV @ 100 mA, 1 A	—
Collector Cutoff Current (Max)	100	nA
DC Current Gain (hFE) Minimum @ Ic, Vce	100 @ 500 mA, 5 V	—
Power Dissipation Maximum	1	W
Transition Frequency	150	MHz
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	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DZT591C-13 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Collector-emitter breakdown voltage must be ≥ 60 V
Maximum collector current must be ≥ 1 A
Operating temperature range must encompass -55°C to 150°C
Mounting type must be surface mount
Package must be compatible with TO-261-4, TO-261AA footprint (SOT-223 family)
RoHS3 compliance required

Secondary Compatibility Factors:

Vce saturation characteristics
DC current gain (hFE) specifications
Transition frequency performance
Power dissipation capability

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with active product status) and Functional Alternatives (meeting electrical requirements with potential trade-offs in secondary parameters such as power rating or transition frequency).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce Breakdown (Max) [V]	Vce Sat @ Ib, Ic [mV]	hFE (Min) @ Ic, Vce	Power (Max) [W]	Freq [MHz]	Temp Range [°C]	Package	Status
DZT591C-13	Diodes Incorporated	1	60	600 @ 100mA, 1A	100 @ 500mA, 5V	1	150	-55 to 150	SOT-223-3	Obsolete
FZT591TA	Diodes Incorporated	1	60	600 @ 100mA, 1A	100 @ 500mA, 5V	2	150	-55 to 150	SOT-223-3	Active
BCP51-16-TP	Micro Commercial Co	1	45	500 @ 50mA, 500mA	100 @ 150mA, 2V	0.3	100	-55 to 150	SOT-223	Active
BCP52,135	Nexperia USA Inc.	1	60	500 @ 50mA, 500mA	63 @ 150mA, 2V	1	145	-55 to 150	SOT-223	Active
BCP52-10,135	Nexperia USA Inc.	1	60	500 @ 50mA, 500mA	63 @ 150mA, 2V	1.3	145	-55 to 150	SOT-223	Active
BCP52-16,115	Nexperia USA Inc.	1	60	500 @ 50mA, 500mA	100 @ 150mA, 2V	1	145	-55 to 150	SOT-223	Active
BSP31,115	NXP USA Inc.	1	60	500 @ 50mA, 500mA	100 @ 100mA, 5V	1.3	100	-55 to 150	SOT-223	Active
NSS60600MZ4T1G	onsemi	6	60	350 @ 600mA, 6A	120 @ 1A, 2V	0.8	100	-55 to 150	SOT-223 (TO-261)	Active
NZT660A	onsemi	3	60	500 @ 300mA, 3A	250 @ 500mA, 2V	2	75	-55 to 150	SOT-223-4	Active
NZT751	Fairchild Semiconductor	4	60	500 @ 200mA, 2A	40 @ 2A, 2V	1.2	75	-55 to 150	SOT-223-4	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The FZT591TA manufactured by Diodes Incorporated is the direct equivalent to the DZT591C-13. This part maintains identical electrical specifications across all primary parameters: 1 A collector current, 60 V breakdown voltage, 150 MHz transition frequency, and -55°C to 150°C operating range. The FZT591TA offers enhanced power dissipation capability (2 W versus 1 W), providing additional thermal margin. The part is in active production status with substantial inventory availability (25,094 units), ensuring supply continuity. RoHS3 compliance and MSL-1 rating are maintained.

Secondary Substitutes (Voltage and Current Compatible):

The BCP52-16,115 (Nexperia USA Inc.) and BCP52,135 (Nexperia USA Inc.) are functionally compatible alternatives meeting the 60 V / 1 A electrical envelope. Both parts maintain the -55°C to 150°C temperature range and SOT-223 package compatibility. These devices carry AEC-Q100 automotive qualification and are suitable for applications requiring automotive-grade reliability. The BCP52-16,115 variant provides hFE matching (100 @ 150 mA, 2 V) closer to the original specification.

The BSP31,115 (NXP USA Inc.) provides equivalent voltage and current ratings with enhanced power handling (1.3 W) and maintains full temperature range compatibility.

Functional Alternatives (Higher Current Capability):

The NZT660A (onsemi) and NZT751 (Fairchild Semiconductor) offer higher collector current ratings (3 A and 4 A respectively) while maintaining 60 V breakdown voltage and full temperature range operation. These parts are suitable for applications where current headroom is beneficial, though transition frequency is reduced to 75 MHz. Both are in active production with strong inventory positions.

Not Recommended:

The BCP51-16-TP (Micro Commercial Co) operates at reduced voltage rating (45 V maximum) and reduced power dissipation (300 mW), making it unsuitable for applications requiring the full 60 V specification of the DZT591C-13.

Frequently Asked Questions (FAQ)

Q: Can the FZT591TA directly replace the DZT591C-13 without circuit modification?

A: Yes. The FZT591TA is electrically and mechanically identical to the DZT591C-13 across all specified parameters. The increased power rating (2 W versus 1 W) provides additional thermal margin without requiring design changes. Both parts use the SOT-223-3 package and are pin-compatible.

Q: What is the primary difference between the DZT591C-13 and BCP52 series substitutes?

A: The BCP52 series (BCP52,135 and BCP52-16,115) maintains the 60 V / 1 A electrical specification but exhibits different saturation voltage characteristics (500 mV versus 600 mV at specified test conditions) and lower transition frequency (145 MHz versus 150 MHz). These differences are within typical application tolerances for general-purpose switching applications. The BCP52 series carries automotive qualification (AEC-Q100).

Q: Are the NZT660A and NZT751 suitable for 1 A applications?

A: Yes. Both the NZT660A (3 A maximum) and NZT751 (4 A maximum) are rated for collector currents exceeding 1 A and maintain 60 V breakdown voltage. These parts are suitable for applications operating at 1 A, providing current headroom. However, transition frequency is reduced to 75 MHz compared to the original 150 MHz specification.

Q: What packaging considerations apply to substitute selection?

A: All recommended substitutes use SOT-223 family packages (SOT-223-3 or SOT-223-4) compatible with TO-261-4 and TO-261AA footprints. The SOT-223-3 and SOT-223-4 variants differ in pin count but maintain identical lead spacing and mounting footprint. Verify PCB layout compatibility with the specific variant selected.

Q: Does the DZT591C-13 obsolescence affect long-term supply of substitute parts?

A: No. All recommended substitutes are in active production status with substantial inventory levels. The FZT591TA (25,094 units), BCP52,135 (12,300 units), and NZT660A (20,127 units) demonstrate strong supply availability. Active product status ensures continued manufacturing and supply chain support.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitutes carry RoHS3 compliance certification. Moisture sensitivity level (MSL-1) is maintained across all alternatives, indicating unlimited shelf life under standard storage conditions.

Q: What is the significance of the hFE (DC current gain) variation among substitutes?

A: The hFE specification determines base current requirements for saturation. The DZT591C-13 specifies hFE minimum of 100 @ 500 mA, 5 V. The FZT591TA matches this specification exactly. The BCP52 series specifies hFE minimum of 63 @ 150 mA, 2 V, requiring higher base current for equivalent saturation. The NZT660A specifies hFE minimum of 250 @ 500 mA, 2 V, requiring lower base current. Circuit design must account for these differences in base drive requirements.

Q: Can the BCP51-16-TP be used in applications rated for 60 V operation?

A: No. The BCP51-16-TP is rated for maximum 45 V collector-emitter breakdown voltage, making it unsuitable for circuits requiring the full 60 V specification of the DZT591C-13. Use of this part in 60 V applications risks device failure and circuit malfunction.

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