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Nexperia USA Inc. PMEG4005ET-QR
- Part No.:
- PMEG4005ET-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PMEG4005ET-QR.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:423
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Product details
Overview
PMEG4005ET-QR from Nexperia is a 40 V, 0.5 A automotive-qualified Schottky barrier rectifier in SOT23 package, featuring very low forward voltage (420–470 mV at 500 mA), integrated guard ring for stress protection, and optimized for low-loss DC-to-DC conversion in space-constrained automotive power rails.
For engineers reviewing the PMEG4005ET-QR datasheet, PMEG4005ET-QR pinout, PMEG4005ET-QR application, or PMEG4005ET-QR equivalent, key selection criteria include forward voltage at rated current, reverse leakage at 40 V, thermal resistance under PCB mounting conditions, and AEC-Q101 qualification status for under-hood deployment.
Technical Context
This MEGA Schottky rectifier uses planar silicon construction with an integrated guard ring to enhance ruggedness against transient overvoltage and electrostatic stress. Its low VF stems from optimized metal-semiconductor junction design and thin epitaxial layer, enabling high efficiency in low-voltage (<5 V) output stages.
It operates with zero recovery time and negligible switching loss, making it suitable for high-frequency synchronous rectification and reverse polarity protection where fast turn-off and minimal conduction loss are critical. Thermal performance is defined for two PCB mounting configurations: standard footprint (Rth(j-a) = 440 K/W) and enhanced cathode pad (300 K/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 420–470 mV at 500 mA pulsed - enables <150 mW conduction loss in 3.3 V/5 V rail protection |
| Reverse Voltage (VR) | 40 V maximum - supports 24 V automotive systems with 100 % margin over nominal bus |
| Forward Current (IF) | 0.5 A continuous - sustains steady-state load in USB-C PD auxiliary power paths |
| Reverse Leakage (IR) | ≤100 µA at 40 V, 25 °C - ensures minimal standby drain in always-on modules |
| Diode Capacitance (Cd) | 43–50 pF at 1 V - limits high-frequency noise coupling in SMPS feedback loops |
| Junction Temperature (Tj) | 150 °C max - allows operation in engine control unit (ECU) ambient up to 125 °C |
| Thermal Resistance (Rth(j-a)) | 300 K/W with 1 cm² cathode pad - defines heatsinking requirement for 420 mW Ptot |
Pinout & Package
Encapsulated in a standard SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), the device features three terminals with Pin 2 internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Input terminal for forward conduction; connects to higher-potential rail in reverse polarity protection |
| 2 | Not Connected (n.c.) | No internal bond; must remain floating - not usable as thermal pad or shield |
| 3 | Cathode (K) | Output terminal; ties to system ground or lower-potential node; primary thermal path via soldered pad |
Key Features
| Feature | Design Value |
|---|---|
| Guard Ring Integration | Enhances ESD robustness (HBM >8 kV) and transient overvoltage tolerance without external clamping |
| AEC-Q101 Qualification | Validated for automotive use per stress test requirements including temperature cycling, HTRB, and UHAST |
| Low-Voltage Forward Drop | Sub-470 mV VF at full rated current reduces power loss by ≥35 % vs. standard Schottky diodes in 3.3 V rails |
| Small-Signal Switching Speed | Zero reverse recovery charge (Qrr ≈ 0) eliminates switching spikes in 1–3 MHz DC/DC converters |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Auxiliary Rail |
|---|---|
Use Scenario: Reverse polarity protection on 12 V input to microcontroller power supply in door module. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during battery jump-start misconnection. Use Value: 420 mV VF limits voltage drop to <0.5 % of rail, preserving brown-out margin for 3.3 V LDO input. | Use Scenario: OR-ing diode in dual-input (adapter + battery) 5 V auxiliary power path for USB-C port controller. IC Role / Device Role / Timing Role: Low-loss conduction path enabling seamless source switchover without voltage glitch. Use Value: 100 µA max IR at 40 V prevents battery self-discharge during adapter-only operation. |
| Industrial Sensor Node Power Input | Low-Power IoT Gateway DC/DC Output Stage |
Use Scenario: Input rectification for energy-harvesting boost converter powering wireless sensor transceiver. IC Role / Device Role / Timing Role: High-efficiency AC-to-DC interface for piezoelectric or solar mini-harvester output. Use Value: 43 pF Cd minimizes capacitive loading on high-impedance harvester source, preserving open-circuit voltage. | Use Scenario: Synchronous rectifier replacement in 1.2 V/1 A buck converter for BLE SoC core supply. IC Role / Device Role / Timing Role: Freewheeling diode operating at 2 MHz switching frequency with zero recovery loss. Use Value: 300 K/W Rth(j-a) with enhanced pad enables stable 1 A operation without heatsink in 25 mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40501MT1G | Same SOT23-3 package, 40 V/0.5 A rating, but VF = 490 mV min at 500 mA - 70 mV higher typical drop | Higher conduction loss reduces efficiency in thermally constrained 3.3 V rails | Select when legacy ON BOM alignment outweighs 3–5 % efficiency penalty |
| Vishay SS14-E3/57T | SMA package (larger), 40 V/1 A rating, VF = 500 mV typ - double current but 30 % larger footprint and no AEC-Q101 | Not suitable for space-limited automotive PCBs; lacks automotive qualification | Prefer for industrial non-automotive designs requiring higher surge current (IFSM = 30 A) |
Compared with NSS40501MT1G and SS14-E3/57T, PMEG4005ET-QR delivers the lowest forward voltage in SOT23 while maintaining AEC-Q101 compliance - critical for minimizing heat generation and maximizing reliability in compact automotive power nodes.
Availability
PMEG4005ET-QR is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power delivery subsystems, and industrial sensor node power inputs requiring stable component supply with guaranteed long-term availability.
Supply support for PMEG4005ET-QR 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
This device belongs to Nexperia's MEGA Schottky rectifier product line, engineered specifically for ultra-low forward voltage and AEC-Q101 compliance in next-generation automotive power management and portable electronics.
FAQ
Is PMEG4005ET-QR pin-compatible with standard SOT23 Schottky diodes?
Yes - it uses the industry-standard SOT23-3 footprint with anode (Pin 1), n.c. (Pin 2), and cathode (Pin 3). Pin 2 is unconnected and must remain unbonded; layout must follow Nexperia's recommended 1 cm² cathode copper pad for thermal performance.
What is the maximum allowable ambient temperature for continuous 0.5 A operation?
At 0.5 A continuous current, the junction temperature must stay ≤150 °C. With Rth(j-a) = 300 K/W (enhanced pad), maximum ambient is 125 °C. At Rth(j-a) = 440 K/W (standard pad), ambient must be ≤108 °C to maintain Tj margin.
Does PMEG4005ET-QR support reflow soldering per JEDEC J-STD-020?
Yes - it is qualified for lead-free reflow per JEDEC J-STD-020D. Peak temperature must not exceed 260 °C for ≤30 seconds. Figure 5 in the datasheet specifies the exact solder land pattern (0.6 mm × 0.7 mm pads, 1.9 mm pitch) required for reliable joint formation.
How does the guard ring improve reliability in automotive environments?
The integrated guard ring mitigates edge breakdown under high dv/dt transients and suppresses leakage current growth during temperature/humidity stress. It enables pass-fail compliance with AEC-Q101 tests including 1000-hour HTRB at 125 °C and 8 kV HBM ESD - essential for under-hood ECU longevity.
PMEG4005ET-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 470 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- 43pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C
PMEG4005ET-QR FAQ
1.How can I place an order for PMEG4005ET-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PMEG4005ET-QR 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 PMEG4005ET-QR reliable?
The price and inventory of PMEG4005ET-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMEG4005ET-QR is usually 5 days.
3.What payment methods are accepted for PMEG4005ET-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMEG4005ET-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PMEG4005ET-QR?
PMEG4005ET-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PMEG4005ET-QR 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 PMEG4005ET-QR?
For technical support, including PMEG4005ET-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMEG4005ET-QR requirements.
6.How does Aetrix verify that PMEG4005ET-QR is sourced from the original manufacturer or authorized distributors?
All PMEG4005ET-QR 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 PMEG4005ET-QR meets industry standards.
7.What is the process for return or replacement of PMEG4005ET-QR?
All PMEG4005ET-QR units undergo pre-shipment inspection (PSI). If there is an issue with PMEG4005ET-QR, 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 PMEG4005ET-QR part is unused and in its original packaging.
Return procedure for PMEG4005ET-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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