ZXTP25015DFHTA Equivalent & Substitute Parts

Part Overview

The ZXTP25015DFHTA is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for surface mount applications in the SOT-23-3 package. This component operates at a maximum collector current of 4 A with a collector-emitter breakdown voltage of 15 V, making it suitable for moderate-power switching and amplification circuits. The device is RoHS3 compliant and currently in active production status with substantial inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	4	A
Voltage - Collector Emitter Breakdown (Max)	15	V
Vce Saturation (Max) @ Ib, Ic	220 mV @ 500 mA, 5 A	—
Current - Collector Cutoff (Max)	50	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	300 @ 10 mA, 2 V	—
Power - Max	1.25	W
Frequency - Transition	295	MHz
Operating Temperature	-55 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ZXTP25015DFHTA is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: PNP configuration required
Package / Case: SOT-23-3 (TO-236-3, SC-59) for mechanical compatibility
Current - Collector (Ic) (Max): Minimum 4 A capability
Voltage - Collector Emitter Breakdown (Max): Minimum 15 V rating
Power - Max: Minimum 1.25 W dissipation capability
Operating Temperature Range: -55°C to 150°C (TJ)
RoHS Status: ROHS3 Compliant
Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on electrical performance alignment:

Category 1: Full Electrical Equivalents — Parts meeting or exceeding all primary electrical parameters while maintaining SOT-23-3 package compatibility.

Category 2: Reduced Performance Substitutes — Parts with lower current or voltage ratings that operate within the same package but require application-level verification for current and power handling.

Parameter Comparison

Parameter	ZXTP25015DFHTA (Main)	2SB1705TL	CPH3106-TL-E	MMBT2907ALT1G	MMBT2907ALT3G	MMBT4403LT1G	MMBT4403LT3G
Manufacturer	Diodes Inc.	Rohm Semi.	onsemi	onsemi	onsemi	onsemi	onsemi
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP	PNP
Ic (Max) [A]	4	3	3	0.6	0.6	0.6	0.6
Vce Breakdown (Max) [V]	15	12	12	60	60	40	40
Vce Saturation (Max) [mV]	220 @ 500mA, 5A	250 @ 30mA, 1.5A	165 @ 30mA, 1.5A	1600 @ 50mA, 500mA	1600 @ 50mA, 500mA	750 @ 50mA, 500mA	750 @ 50mA, 500mA
Icbo (Max) [nA]	50	100	100	10	10	—	—
hFE (Min) @ Ic, Vce	300 @ 10mA, 2V	270 @ 500mA, 2V	200 @ 500mA, 2V	100 @ 150mA, 10V	100 @ 150mA, 10V	100 @ 150mA, 2V	100 @ 150mA, 2V
Power (Max) [W]	1.25	0.5	0.9	0.3	0.3	0.3	0.3
Frequency - Transition [MHz]	295	280	280	200	200	200	200
Operating Temperature [°C]	-55 to 150	to 150	to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package / Case	SOT-23-3	TSMT3 (SC-96)	3-CPH (SC-96)	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Product Status	Active	Active	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3

Engineering Selection Recommendations

Direct Mechanical Equivalent (Same Package):

The MMBT2907ALT1G, MMBT2907ALT3G, MMBT4403LT1G, and MMBT4403LT3G are all housed in the SOT-23-3 package and share identical mechanical compatibility with the ZXTP25015DFHTA. All listed substitutes maintain RoHS3 compliance and MSL 1 rating. However, these parts operate at reduced collector current ratings (0.6 A maximum) and lower power dissipation (0.3 W maximum), making them unsuitable for applications requiring the full 4 A current capability of the main part.

Reduced Performance Substitutes:

The 2SB1705TL (Rohm Semiconductor) and CPH3106-TL-E (onsemi) provide intermediate current ratings of 3 A, approaching the main part specification. However, both use different package types (TSMT3 and 3-CPH respectively, both SC-96 variants) and are not mechanically compatible with SOT-23-3 footprints. The CPH3106-TL-E carries obsolete product status and should not be selected for new designs.

Recommended Selection Path:

For applications requiring full electrical equivalence with the ZXTP25015DFHTA, the parametric equivalent ZXTP25015DFHTA itself remains the optimal choice given its active status, high inventory availability (119,200 pcs), and complete specification match. When package-compatible alternatives are required, selection must account for the significant reduction in current and power handling capability of SOT-23-3 alternatives.

Frequently Asked Questions (FAQ)

Q: Can MMBT2907ALT1G or MMBT4403LT1G be used as direct replacements for ZXTP25015DFHTA?

A: These parts share the SOT-23-3 package and PNP configuration but are not direct replacements. The MMBT series parts are rated for maximum 0.6 A collector current versus 4 A for the ZXTP25015DFHTA. Use is limited to applications where collector current does not exceed 0.6 A and power dissipation remains below 0.3 W.

Q: Why are 2SB1705TL and CPH3106-TL-E listed as substitutes if they use different packages?

A: These parts are listed as parametric equivalents based on electrical characteristics (3 A collector current, 12 V breakdown voltage, PNP type). However, they employ SC-96 package variants (TSMT3 and 3-CPH) rather than SOT-23-3, requiring different PCB footprints and are not mechanically interchangeable without board redesign.

Q: What is the significance of the CPH3106-TL-E obsolete status?

A: Obsolete product status indicates the part is no longer in active production. While inventory may be available, long-term supply cannot be guaranteed. New designs should not incorporate obsolete components. The CPH3106-TL-E should be avoided in favor of active alternatives.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification, matching the environmental compliance status of the ZXTP25015DFHTA.

Q: What is the primary limitation of SOT-23-3 package alternatives?

A: The SOT-23-3 package physically constrains power dissipation capability. All SOT-23-3 alternatives (MMBT2907 and MMBT4403 series) are limited to 0.3 W maximum power, compared to 1.25 W for the ZXTP25015DFHTA. This directly limits collector current handling in practical applications.

Q: Can I use MMBT4403LT3G in place of MMBT4403LT1G?

A: Both parts are electrically identical (MMBT4403 base product number) with matching electrical specifications. The primary difference is packaging format: LT1G uses Cut Tape (CT) & Digi-Reel®, while LT3G uses Tape & Reel (TR). Selection depends on procurement and assembly requirements rather than electrical performance.

Q: What parameters must match for a valid substitution?

A: Critical parameters for substitution are: PNP transistor type, SOT-23-3 package (for mechanical compatibility), collector current rating of at least 4 A, collector-emitter breakdown voltage of at least 15 V, power rating of at least 1.25 W, and operating temperature range of -55°C to 150°C. RoHS3 compliance and MSL 1 rating must also be maintained.

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