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Diodes Incorporated ZXTN25020CFHTA
- Part No.:
- ZXTN25020CFHTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN25020CFHTA.pdf
- Description:
- TRANS NPN 20V 4.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,506
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Product details
Overview
ZXTN25020CFHTA from Diodes Incorporated (formerly Zetex Semiconductors) is an NPN medium-power bipolar junction transistor in SOT23 package, rated for 20V VCEO, 4.5A continuous collector current, and 1.25W power dissipation on 50mm×50mm PCB. It delivers 35–45mV VCE(sat) at 1A/100mA drive and supports MOSFET gate driving, DC-DC converter switching, and motor control with 70V forward blocking capability.
For engineers reviewing the ZXTN25020CFHTA datasheet, ZXTN25020CFHTA pinout, ZXTN25020CFHTA application, or ZXTN25020CFHTA equivalent, key selection criteria include verified VCEX ≥70V, RCE(sat) = 28 mΩ, hFE ≥90 at 4.5A, fT = 185 MHz, and thermal resistance RJA = 100°C/W on standard FR4 layout.
Technical Context
This device uses an advanced epitaxial process to achieve high gain and low saturation voltage while maintaining robust 70V forward blocking (BVCEX) and 5V reverse blocking (BVECO). Its 185 MHz transition frequency and fast switching times (td = 70.5 ns, tf = 65 ns) support high-frequency PWM operation in power conversion stages.
The SOT23 package enables compact placement in space-constrained designs, with validated thermal performance across PCB copper configurations: RJA = 100°C/W on 50mm×50mm 2 oz Cu, enabling stable 4.5A continuous conduction without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 20 V - Maximum safe collector-emitter voltage with base open; defines primary DC blocking rating for low-voltage switching. |
| IC(cont) | 4.5 A - Continuous collector current supported on 50mm×50mm PCB; enables direct drive of small motors or MOSFET gates without heatsinking. |
| VCE(sat) | 35–45 mV @ 1A/100mA - Low saturation voltage minimizes conduction loss in high-current switching paths. |
| hFE | 90–145 @ 4.5A - Confirmed DC current gain at full rated current ensures reliable base drive sizing. |
| fT | 185 MHz - Transition frequency validates suitability for >100 kHz PWM applications including DC-DC controllers. |
| RJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 50mm×50mm FR4; determines temperature rise under load. |
| BVCEX | 70 V - Forward blocking voltage with base-emitter resistor bias; critical for gate driver flyback protection. |
Pinout & Package
SOT23-3 plastic surface-mount package (JEDEC TO-236AB), 2.67–3.05 mm length, 1.20–1.40 mm width, 0.95 mm nominal lead pitch. Compact footprint ideal for dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current return path; connected to ground or low-side reference in common-emitter switches. |
| 2 (Base) | B | Control input; requires ~100 mA drive for full 1A switching; low VBE(sat) = 905–1000 mV eases driver design. |
| 3 (Collector) | C | High-current output node; handles up to 4.5A; tied to load or MOSFET gate in driver configurations. |
Key Features
| Feature | Design Value |
|---|---|
| High peak current capability | 10 A ICM enables short-duration surge handling in motor startup or fault conditions. |
| Low saturation resistance | RCE(sat) = 28 mΩ reduces I²R losses and self-heating during sustained conduction. |
| 70V forward blocking | BVCEX ≥70 V allows safe operation with inductive kickback in gate drivers and relay drivers. |
| High-speed switching | tf = 65 ns and ts = 266 ns support efficient high-frequency PWM with minimal dead-time overhead. |
Applications
| MOSFET Gate Driver | DC-DC Converter Switch |
|---|---|
Use Scenario: Driving the gate of a logic-level N-channel MOSFET in a synchronous buck converter. IC Role / Device Role / Timing Role: NPN switch providing low-impedance pull-down path and fast turn-off timing. Use Value: 65 ns fall time and 35 mV VCE(sat) minimize gate discharge delay and conduction loss during active switching. | Use Scenario: High-side or low-side switching element in non-isolated DC-DC modules up to 20V input. IC Role / Device Role / Timing Role: Medium-power BJT switch controlling energy transfer in PWM-controlled inductor circuits. Use Value: 4.5A IC(cont) and 185 MHz fT support stable operation at 200–500 kHz switching frequencies. |
| Brushed DC Motor Control | DC Fan Driver |
Use Scenario: H-bridge half-bridge leg for bidirectional control of 12V brushed motors in automotive HVAC or industrial actuators. IC Role / Device Role / Timing Role: Power switch delivering pulsed current to motor windings with controlled commutation. Use Value: 70V BVCEX withstands back-EMF spikes; 1.25W PD sustains 100% duty cycle at rated current on standard PCB. | Use Scenario: Constant-current or PWM-driven cooling fan in embedded systems requiring silent, reliable airflow. IC Role / Device Role / Timing Role: Linear or switched current source regulating fan speed via emitter-follower or common-emitter topology. Use Value: hFE ≥90 at 4.5A ensures stable current regulation without excessive base drive power dissipation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25040CFHTA | Higher VCEO = 40V, same SOT23 package, 4.5A IC, but VCE(sat) = 55–75 mV @ 1A. | Supports higher bus voltages; less suitable for ultra-low-loss 12V gate driving. | Select when system VIN exceeds 20V but <40V and space remains constrained. |
| MMBT2222ALT1G | Lower IC = 600 mA, VCEO = 40V, VCE(sat) = 1V @ 150 mA; TO-236 package. | Not suitable for >1A loads; limited to signal-level or low-power switching. | Use only for logic-level translation or low-current biasing where thermal margin is ample. |
Compared with ZXTN25040CFHTA, this part offers lower conduction loss at 1A but sacrifices 20V headroom; versus MMBT2222ALT1G, it delivers 7.5× higher current capacity and 20× lower VCE(sat), making it uniquely suited for compact, high-current switching.
Availability
ZXTN25020CFHTA is available at Aetrix Electronics and suitable for MOSFET gate drivers, DC-DC converters, and brushed DC motor control requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ZXTN25020CFHTA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated acquired Zetex Semiconductors in 2008 and maintains its high-performance discrete portfolio with focus on power efficiency and reliability in industrial and automotive applications.
ZXTN25020CFHTA belongs to Zetex's medium-power BJT family, engineered specifically for space-constrained, high-current switching where low VCE(sat), fast switching, and robust blocking voltage are essential.
FAQ
What is the maximum safe operating temperature for ZXTN25020CFHTA?
The device supports junction temperatures from –55°C to +150°C. With RJA = 100°C/W on a 50mm×50mm PCB, it reaches 150°C junction at 1.25W dissipation and 25°C ambient-matching its rated 4.5A continuous current under those thermal conditions.
Can ZXTN25020CFHTA replace a MOSFET in low-side switching?
It can serve as a low-side switch where gate drive simplicity and cost outweigh RDS(on) advantages. At 4.5A, its 35–45mV VCE(sat) yields ~0.2W conduction loss-comparable to many small-signal MOSFETs-but requires base current limiting and lacks inherent voltage-controlled operation.
Is the SOT23 package lead-free and RoHS compliant?
Yes. ZXTN25020CFHTA is manufactured per Diodes Incorporated's standard RoHS-compliant process, with lead-free matte tin plating on terminals and halogen-free molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 1.
How does the 70V BVCEX rating differ from the 20V VCEO rating?
VCEO = 20V is the maximum collector-emitter voltage with base open-used for DC steady-state ratings. BVCEX = 70V applies when a resistor biases the base-emitter junction, allowing safe clamping of inductive flyback spikes far exceeding the DC rail, critical in gate driver protection.
ZXTN25020CFHTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 4.5 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 140mV @ 450mA, 4.5A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 10mA, 2V
- Power - Max:
- 1.25 W
- Frequency - Transition:
- 185MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN25020CFHTA FAQ
1.How can I place an order for ZXTN25020CFHTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN25020CFHTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZXTN25020CFHTA reliable?
The price and inventory of ZXTN25020CFHTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN25020CFHTA is usually 5 days.
3.What payment methods are accepted for ZXTN25020CFHTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN25020CFHTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN25020CFHTA?
ZXTN25020CFHTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN25020CFHTA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZXTN25020CFHTA?
For technical support, including ZXTN25020CFHTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN25020CFHTA requirements.
6.How does Aetrix verify that ZXTN25020CFHTA is sourced from the original manufacturer or authorized distributors?
All ZXTN25020CFHTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZXTN25020CFHTA meets industry standards.
7.What is the process for return or replacement of ZXTN25020CFHTA?
All ZXTN25020CFHTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN25020CFHTA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZXTN25020CFHTA part is unused and in its original packaging.
Return procedure for ZXTN25020CFHTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXTN25020CFHTA Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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