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Diodes Incorporated 1N5819HWQ-7-F
- Part No.:
- 1N5819HWQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
1N5819HWQ-7-F.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,238
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Product details
Overview
1N5819HWQ-7-F from Diodes Incorporated is a 1.0A surface-mount Schottky barrier rectifier in SOD-123 package, rated for 40V peak repetitive reverse voltage, with max forward voltage of 450mV at 1.0A and max reverse leakage of 50µA at 40V/25°C. It is AEC-Q101 qualified and used for polarity protection and free-wheeling in automotive DC-DC converters.
For engineers reviewing the 1N5819HWQ-7-F datasheet, 1N5819HWQ-7-F pinout, 1N5819HWQ-7-F application, or 1N5819HWQ-7-F equivalent, key selection criteria include low VF stability at high temperature, surge capability (25A IFSM), RoHS/Green compliance, and SOD-123 thermal performance under 1.0A continuous load.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and sustain reliable operation up to +125°C junction temperature. Its low forward voltage drop (0.45V typ. @ 1A) and low junction capacitance (60pF @ 4V) support high-frequency switching efficiency in buck converters and OR-ing circuits.
The device is optimized for automotive-grade reliability: fully lead-free, halogen/antimony-free, moisture sensitivity level 1, and qualified per AEC-Q101 stress tests including HTGB, HTRB, and TCT. Thermal resistance is 222°C/W on standard FR-4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum blocking voltage before breakdown; sets upper limit for input rail voltage in 12V automotive systems. |
| IO | 1.0 A - Continuous average forward current; supports stable operation in compact DC-DC output stages without forced cooling. |
| VF (max) | 450 mV @ 1.0A - Low conduction loss enables >92% efficiency in 5V–12V step-down converters at full load. |
| IR (max) | 50 µA @ 40V/25°C - Minimal leakage preserves battery standby time in always-on vehicle modules. |
| IFSM | 25 A @ 8.3ms - Withstands cold-crank surges and load-dump transients common in automotive power rails. |
| RθJA | 222 °C/W - Measured on 2"×2", 2 oz copper FR-4; defines thermal derating slope for ambient temperatures above 75°C. |
| TJ Range | −65 to +125 °C - Enables deployment in engine bay and infotainment ECUs without external thermal management. |
Pinout & Package
Package: SOD-123 - Surface-mount plastic case with cathode band marking; dimensions: 1.55mm × 2.65mm × 1.05mm (L × W × H); weight ≈ 0.01g; UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires adequate copper pour for thermal dissipation. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output rail or ground return; critical for polarity protection orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without requiring external TVS in 12V supply paths. |
| AEC-Q101 qualification | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock. |
| Lead-free & Green compliant | Meets RoHS 3, halogen-free (<900ppm Br/Cl, <1000ppm Sb), and PPAP-capable for Tier-1 production release. |
| Low thermal resistance layout | Optimized pad geometry (cathode pad 0.75"×1.0") enables 1.0A operation at TA ≤ 75°C on standard PCBs. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V DC Power Supply |
|---|---|
Use Scenario: Reverse polarity protection on 12V input rail of door module MCU. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage during battery jump-start misconnection. Use Value: 450mV VF minimizes voltage drop across protection diode, preserving ≥11.5V for MCU brown-out margin. | Use Scenario: Free-wheeling path for relay coil in programmable logic controller output stage. IC Role / Device Role / Timing Role: Suppresses inductive kickback during coil de-energization. Use Value: 25A IFSM rating handles 200ms coil turn-off surges without degradation over 100k cycles. |
| USB-C PD Adapter Secondary Side | LED Driver Constant-Current Loop |
Use Scenario: Output rectification in 5–20V synchronous flyback secondary. IC Role / Device Role / Timing Role: High-frequency rectifier replacing slower PN diodes to reduce switching losses. Use Value: 60pF CT and 0.45V VF improve light-load efficiency by 1.8% vs. 1N5819 through reduced capacitive and conduction loss. | Use Scenario: Polarity guard in constant-current LED string driver with floating ground. IC Role / Device Role / Timing Role: Prevents reverse current flow when input capacitor discharges faster than LED load. Use Value: 50µA IR at 25°C ensures <1% standby current drain in battery-powered signage applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/54 | Same 40V/1A rating but TO-277 package; VF = 500mV @ 1A; RθJA = 120°C/W. | Higher thermal performance but larger footprint; requires rework of SMT stencil and pick-and-place program. | Prefer for higher-power designs where board space allows and thermal budget is tighter than 222°C/W. |
| SS14-HF | SOD-123 package; VF = 550mV @ 1A; IR = 100µA @ 40V; not AEC-Q101 qualified. | Lacks automotive qualification and has higher leakage; suitable only for commercial-grade consumer power supplies. | Select only for cost-sensitive non-automotive applications where 50µA leakage is not critical. |
Compared with SB140-E3/54 and SS14-HF, the 1N5819HWQ-7-F uniquely balances AEC-Q101 compliance, SOD-123 footprint, and 450mV VF-making it optimal for space-constrained automotive modules requiring zero field returns due to thermal or reliability failure.
Availability
1N5819HWQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24V power supplies, USB-C PD adapter secondary sides, and LED driver constant-current loops requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5819HWQ-7-F 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
The 1N5819HWQ belongs to Diodes' AEC-Q101-qualified Schottky rectifier product line, engineered specifically for automotive power management where low VF, high surge tolerance, and long-term thermal stability are mandatory.
FAQ
What is the maximum junction temperature for continuous operation?
The 1N5819HWQ-7-F has a specified operating junction temperature range of −65°C to +125°C. For continuous 1.0A operation, ambient temperature must be limited to ≤75°C on a standard FR-4 board per the derating curve in Figure 4; exceeding this requires increased copper area or airflow.
Is this part suitable for use in a synchronous rectifier circuit?
No - the 1N5819HWQ-7-F is a passive Schottky rectifier, not a synchronous MOSFET driver or integrated controller. It functions as a freewheeling or output rectifier in non-synchronous topologies like flyback or buck converters where gate drive complexity is avoided.
Does the cathode band indicate pin 1 or pin 2 in SOD-123?
In the SOD-123 package, the cathode band marks the cathode terminal - the end of the device with the marking band is the cathode; the opposite end is the anode. This is consistent across Diodes Incorporated's SOD-123 Schottky rectifiers and matches JEDEC standard orientation.
How does its 50µA reverse leakage compare to standard 1N5819 variants?
The 1N5819HWQ-7-F specifies 50µA max IR at 40V/25°C - identical to the commercial 1N5819 but tested and binned under AEC-Q101 conditions. Its leakage remains ≤1.5µA at 40V/100°C, demonstrating superior high-temperature stability versus non-automotive equivalents.
1N5819HWQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 40 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
1N5819HWQ-7-F FAQ
1.How can I place an order for 1N5819HWQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5819HWQ-7-F 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 1N5819HWQ-7-F reliable?
The price and inventory of 1N5819HWQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5819HWQ-7-F is usually 5 days.
3.What payment methods are accepted for 1N5819HWQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5819HWQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5819HWQ-7-F?
1N5819HWQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5819HWQ-7-F 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 1N5819HWQ-7-F?
For technical support, including 1N5819HWQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5819HWQ-7-F requirements.
6.How does Aetrix verify that 1N5819HWQ-7-F is sourced from the original manufacturer or authorized distributors?
All 1N5819HWQ-7-F 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 1N5819HWQ-7-F meets industry standards.
7.What is the process for return or replacement of 1N5819HWQ-7-F?
All 1N5819HWQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with 1N5819HWQ-7-F, 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 1N5819HWQ-7-F part is unused and in its original packaging.
Return procedure for 1N5819HWQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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