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Diodes Incorporated ZXTP19040CGQ-7
- Part No.:
- ZXTP19040CGQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZXTP19040CGQ-7.pdf
- Description:
- TRANS PNP 40V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,241
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Product details
Overview
ZXTP19040CGQ-7 from Diodes Incorporated is a -40V, -3A PNP bipolar junction transistor in SOT223 package, optimized for automotive-grade switching and regulation. It delivers VCE(SAT) < -200 mV at -1.0 A, supports 2 W power dissipation on enhanced PCB layout, and meets AEC-Q101 reliability standards for under-hood DC-DC and supply-line applications.
For engineers reviewing the ZXTP19040CGQ-7 datasheet, ZXTP19040CGQ-7 pinout, ZXTP19040CGQ-7 application, or ZXTP19040CGQ-7 equivalent, key selection criteria include verified VCE(SAT) performance at high current, thermal resistance (62.5 °C/W with 2 oz copper), AEC-Q101 qualification status, and SOT223 lead-frame thermal design compatibility.
Technical Context
This PNP BJT operates as a high-current, low-saturation-voltage switch in linear and switching regulator topologies. Its hFE ranges from 100 to 400 across -0.5 A to -3 A collector currents, enabling stable biasing in feedback-controlled LDOs and synchronous rectifier drivers.
Switching performance is characterized by tON = 53 ns, tOFF = 180 ns, and tS = 146 ns under -10 V VCC, -2 A IC, and ±200 mA base drive - confirming suitability for medium-frequency (<1 MHz) power control where turn-off delay must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40 V - Maximum safe collector-emitter blocking voltage in open-base configuration |
| IC (cont.) | -3 A - Continuous collector current rating defining steady-state power stage capacity |
| VCE(SAT) | < -200 mV @ -1.0 A, -10 mA IB - Enables <0.2 W conduction loss in high-efficiency load switches |
| PD (enhanced) | 2 W - Achievable with 25 mm × 25 mm 2 oz copper pad; enables compact thermal design |
| RθJA | 62.5 °C/W - Thermal resistance under optimized PCB layout, critical for ambient >85 °C operation |
| fT | 150 MHz - Transition frequency supporting fast switching and analog gain stability up to ~10 MHz |
| tOFF | 180 ns - Total turn-off time limiting maximum practical switching frequency to ~500 kHz |
Pinout & Package
Package: SOT223 - Surface-mount plastic package with exposed emitter tab for thermal conduction and mechanical anchoring. Dimensions: 6.50 × 3.50 × 1.60 mm (L × W × H); weight ≈ 0.112 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Emitter terminal | Internally connected to exposed metal tab; primary thermal path and current return node |
| Pin 2 (Base) | Control input | Receives negative base current to saturate PNP; requires current-limiting resistor in series |
| Pin 3 (Collector) | Power output | High-side switching node; connects to positive rail in high-side switch configurations |
| Pin 4 (Emitter Tab) | Thermal & electrical emitter | Electrically identical to Pin 1; soldered directly to large copper pour for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (-40 °C to +150 °C) and mechanical stress per JEDEC standard |
| VCE(SAT) < -200 mV @ -1 A | Reduces conduction losses by ≥30% vs. standard PNP transistors in 12 V supply switching |
| 2 W power dissipation capability | Supports higher continuous current without heatsink in space-constrained automotive modules |
| Lead-free & halogen-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and automotive ELV directive requirements |
Applications
| DC-DC Conversion | Supply Line Switching |
|---|---|
Use Scenario: Synchronous rectification in buck converter secondary side for 12 V to 5 V conversion in ADAS ECUs. IC Role / Device Role / Timing Role: PNP switch replacing Schottky diode to reduce forward drop and improve efficiency. Use Value: VCE(SAT) < -200 mV cuts conduction loss by 40% vs. 0.35 V diode drop at 1 A, raising efficiency from 88% to 91%. | Use Scenario: High-side power enable switch controlling 12 V battery feed to infotainment subsystem. IC Role / Device Role / Timing Role: Low-loss PNP pass element with fast turn-off (tOFF = 180 ns) for controlled power sequencing. Use Value: Enables <10 µs power ramp control and eliminates reverse-battery protection diode loss in main supply path. |
| Low Dropout Regulation | LCD Backlighting |
Use Scenario: Pass transistor in automotive-grade LDO supplying 3.3 V to microcontroller core from 5 V rail. IC Role / Device Role / Timing Role: Linear regulator pass device operating in active region with hFE = 200–400 at 0.5–1 A. Use Value: Stable hFE over current ensures predictable dropout voltage and thermal foldback behavior at full load. | Use Scenario: Current sink for LED strings in instrument cluster backlight with PWM dimming. IC Role / Device Role / Timing Role: Fast-switching PNP current controller synchronized to 1–5 kHz PWM signal. Use Value: tOFF = 180 ns and tS = 146 ns prevent LED ghosting and support >99% duty cycle dimming fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTP2012G | VCEO = -20 V, IC = -2 A, VCE(SAT) = -220 mV @ -1 A | Lower voltage rating limits use to ≤12 V systems; reduced current headroom | Select when board space allows SOT23 and system voltage never exceeds 16 V. |
| MJD44H11T4G | VCEO = -80 V, IC = -8 A, SOT223-4, RθJA = 70 °C/W (standard layout) | Higher voltage/current but larger saturation voltage (-400 mV @ -3 A) and lower thermal efficiency | Prefer for industrial 24–48 V systems where robustness outweighs efficiency loss. |
Compared with ZXTP2012G, ZXTP19040CGQ-7 offers 2× higher voltage margin and 1 A higher continuous current; versus MJD44H11T4G, it delivers 55% lower VCE(SAT) and 14% better thermal resistance under identical PCB conditions - making it optimal for 12 V automotive power stages demanding efficiency and reliability.
Availability
ZXTP19040CGQ-7 is available at Aetrix Electronics and suitable for automotive power management, DC-DC conversion, and supply-line switching requiring stable component supply across extended temperature and lifecycle demands.
Supply support for ZXTP19040CGQ-7 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 is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
This device belongs to Diodes' AEC-Q101-qualified automotive bipolar transistor product line, engineered specifically for high-reliability 12 V vehicle subsystems including body control, lighting, and power distribution.
FAQ
What is the maximum allowable junction temperature for ZXTP19040CGQ-7?
The absolute maximum junction temperature is +150 °C, validated per AEC-Q101 stress testing. Operation above this limit risks permanent degradation of hFE and increased leakage. Derating begins at +125 °C ambient when using the 2 oz copper thermal pad layout, requiring thermal simulation for sustained >1.5 A loads.
Is ZXTP19040CGQ-7 compatible with lead-free reflow profiles?
Yes - it is qualified for standard Pb-free reflow per J-STD-020, with peak temperature tolerance up to 260 °C for 30 seconds. The matte tin-plated leads ensure reliable wetting and intermetallic formation during SAC305 soldering, and moisture sensitivity level is rated at Level 1 (unlimited floor life).
How does the SOT223 emitter tab affect PCB layout?
The exposed emitter tab (Pin 1 and Pin 4) must be soldered to a minimum 25 mm² copper area with ≥2 oz thickness to achieve the 62.5 °C/W RθJA rating. Thermal vias beneath the tab are recommended to transfer heat to inner layers; insufficient copper area increases junction temperature by up to 40 °C at full 3 A load.
Can ZXTP19040CGQ-7 replace an NPN transistor in high-side switching?
No - it is a PNP device intended for high-side switching where the emitter connects to the positive rail. Replacing an NPN would require circuit topology changes: base drive polarity reversal, removal of pull-up resistors, and verification of logic-level compatibility with upstream controllers, as its base requires negative current relative to emitter.
ZXTP19040CGQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 220 @ 500mA, 1V
- Power - Max:
- 1.2 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
ZXTP19040CGQ-7 FAQ
1.How can I place an order for ZXTP19040CGQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTP19040CGQ-7 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 ZXTP19040CGQ-7 reliable?
The price and inventory of ZXTP19040CGQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTP19040CGQ-7 is usually 5 days.
3.What payment methods are accepted for ZXTP19040CGQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTP19040CGQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTP19040CGQ-7?
ZXTP19040CGQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTP19040CGQ-7 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 ZXTP19040CGQ-7?
For technical support, including ZXTP19040CGQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTP19040CGQ-7 requirements.
6.How does Aetrix verify that ZXTP19040CGQ-7 is sourced from the original manufacturer or authorized distributors?
All ZXTP19040CGQ-7 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 ZXTP19040CGQ-7 meets industry standards.
7.What is the process for return or replacement of ZXTP19040CGQ-7?
All ZXTP19040CGQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTP19040CGQ-7, 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 ZXTP19040CGQ-7 part is unused and in its original packaging.
Return procedure for ZXTP19040CGQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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