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Diodes Incorporated 1N5819HW-7-F
- Part No.:
- 1N5819HW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
1N5819HW-7-F.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:125,244
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Product details
Overview
1N5819HW-7-F from Diodes Incorporated is a surface-mount Schottky barrier rectifier optimized for low-voltage, high-frequency rectification with 40 V peak reverse voltage, 1.0 A average forward current, 450 mV max forward voltage at 1.0 A, 50 µA max reverse leakage at 40 V and 25°C, and SOD123 package. It serves as a primary freewheeling or polarity protection diode in DC/DC converters and auxiliary power rails.
For engineers reviewing the 1N5819HW-7-F datasheet, 1N5819HW-7-F pinout, 1N5819HW-7-F application, or 1N5819HW-7-F equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (225°C/W), surge capability (25 A IFSM), reverse leakage stability over temperature, and RoHS-compliant lead-free plating compatibility with reflow soldering.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress edge breakdown and improve transient robustness. Its low VF stems from a platinum-silicide or similar low-barrier metal–semiconductor junction, enabling high efficiency in 3.3 V–12 V output stages.
It operates across –65°C to +150°C with derated current above 25°C (e.g., ~0.6 A at 100°C), and exhibits 50–60 pF junction capacitance at 4 V reverse bias-critical for minimizing switching losses in high-frequency (>100 kHz) topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback snubbers or reverse-polarity protection circuits |
| IO | 1.0 A - Continuous DC output current rating at 25°C ambient on 1-inch² copper pad; derates to 0.6 A at 100°C |
| VF (max) | 450 mV @ 1.0 A - Directly reduces conduction loss in low-voltage power paths; enables >92% efficiency in 5 V buck converters |
| IR (max) | 50 µA @ 40 V, 25°C - Low leakage preserves battery life in always-on backup rails and minimizes standby power in adapters |
| RθJA | 225°C/W - Thermal resistance determines junction temperature rise under load; requires PCB copper area planning for sustained 1 A operation |
| IFSM | 25 A @ 8.3 ms - Withstands inrush surges during hot-plug or capacitor charging without degradation |
| CT | 60 pF @ 4 V, 1 MHz - Limits high-frequency displacement current; critical for EMI filtering in SMPS feedback loops |
Pinout & Package
Package: SOD123 - Surface-mount plastic package with cathode band marking, 0.01 g mass, UL 94V-0 rated molding compound, and matte tin–plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in rectifier configuration; must handle full surge current path |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output/load; reverse voltage appears across this node during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche and improves transient voltage immunity-essential for automotive load-dump survivability |
| Low forward voltage (0.45 V max @ 1 A) | Reduces power dissipation by ≥30% vs. comparable PN-junction rectifiers, lowering thermal stress in compact layouts |
| High surge capability (25 A IFSM) | Enables use without external fusing in 12 V automotive accessory modules subject to ISO 7637-2 pulse 5a |
| Lead-free & halogen-free (Green) | Complies with RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1-supports automated assembly without baking |
Applications
| DC/DC Converter Freewheeling | Polarity Protection |
|---|---|
Use Scenario: Freewheeling path in synchronous or asynchronous buck converters delivering 3.3 V/5 V at up to 1 A. IC Role / Device Role / Timing Role: Provides low-loss return path for inductor current during high-side switch off-time; not timing-critical but thermally sensitive. Use Value: 450 mV VF minimizes conduction loss and junction heating, enabling smaller heatsinking or higher ambient operation. | Use Scenario: Reverse-voltage blocking in USB-powered peripherals or industrial sensors with unregulated inputs. IC Role / Device Role / Timing Role: Standalone discrete protection element placed in series with VBUS line; no timing function. Use Value: 50 µA IR at 25°C ensures <1 µW standby loss-critical for battery-backed IoT nodes. |
| Low-Voltage Inverter Output | Automotive Auxiliary Rail |
Use Scenario: Output rectification in 24 V→12 V isolated flyback supplies for LED drivers or motor control logic. IC Role / Device Role / Timing Role: Primary rectifier in secondary-side synchronous or diode-based topology; handles 100–500 kHz switching. Use Value: 60 pF CT limits high-frequency ringing and EMI generation, easing EMC compliance in Class B equipment. | Use Scenario: Reverse-battery protection in 12 V vehicle infotainment head units or ADAS camera modules. IC Role / Device Role / Timing Role: Series-connected blocking diode on main power input; withstands load-dump transients per ISO 16750-2. Use Value: Guard ring structure and 25 A IFSM rating ensure survival during 120 V/50 ms pulses without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-TB | Same SOD123 package; 40 V VRRM, 1.0 A IO, but VF = 500 mV (max @ 1 A); RθJA = 240°C/W | Slightly higher conduction loss and thermal resistance; less suitable for sustained 1 A at >70°C ambient | Prefer when cost sensitivity outweighs thermal margin; verify layout copper area for thermal relief |
| SS14 | DO-214AC (SMA) package; 40 V VRRM, 1.0 A IO, VF = 550 mV (max @ 1 A); higher profile and 0.25 g mass | Larger footprint and weight; incompatible with ultra-thin or space-constrained SOD123 layouts | Select only if existing SMA footprint reuse is required; avoid in height-sensitive consumer designs |
Compared with SB140-TB and SS14, the 1N5819HW-7-F delivers the lowest VF (450 mV) and best thermal resistance (225°C/W) in the SOD123 form factor-making it optimal for thermally constrained, high-efficiency 1 A rectification where board area and profile are limited.
Availability
1N5819HW-7-F is available at Aetrix Electronics and suitable for DC/DC converter freewheeling, polarity protection, and low-voltage inverter output applications requiring stable component supply, consistent RoHS/Green compliance, and SOD123 footprint compatibility.
Supply support for 1N5819HW-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, manufacturing, and sales operations across Asia, Europe, and North America.
The 1N5819HW belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, low-VF rectification in cost-sensitive, high-volume power conversion and protection circuits.
FAQ
What is the maximum junction temperature for continuous operation?
The 1N5819HW-7-F has an operating junction temperature range of –65°C to +150°C. For continuous 1.0 A DC operation, thermal design must ensure TJ stays ≤150°C-achievable with ≥1 inch² copper pad (RθJA = 225°C/W) and ambient ≤70°C, or reduced current at higher temperatures per Fig. 4 derating curve.
Is this part suitable for automotive applications?
The standard 1N5819HW-7-F is not AEC-Q200 qualified. However, Diodes offers the automotive-grade variant 1N5819HWQ (identical electrical specs, AEC-Q200 Grade 1, –40°C to +125°C) for qualified automotive use. Use the Q-suffix version for engine bay or ADAS modules.
How does the guard ring construction improve reliability?
The guard ring die structure prevents premature edge breakdown under high electric field stress, enhancing transient immunity and long-term stability in surge-prone applications like load-dump protection. It also improves consistency of reverse leakage across temperature and process variation.
Can this diode replace a 1N4001 in a linear power supply?
No-while both are rectifiers, the 1N4001 is a 50 V, 1 A PN-junction diode with ~1.1 V VF and slower recovery. The 1N5819HW-7-F's 40 V rating and Schottky architecture make it unsuitable for 50–100 V transformer-fed linear supplies; it is designed for low-voltage, high-frequency SMPS-not 60 Hz mains rectification.
1N5819HW-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:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 125°C
1N5819HW-7-F FAQ
1.How can I place an order for 1N5819HW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5819HW-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 1N5819HW-7-F reliable?
The price and inventory of 1N5819HW-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 1N5819HW-7-F is usually 5 days.
3.What payment methods are accepted for 1N5819HW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5819HW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5819HW-7-F?
1N5819HW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5819HW-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 1N5819HW-7-F?
For technical support, including 1N5819HW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5819HW-7-F requirements.
6.How does Aetrix verify that 1N5819HW-7-F is sourced from the original manufacturer or authorized distributors?
All 1N5819HW-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 1N5819HW-7-F meets industry standards.
7.What is the process for return or replacement of 1N5819HW-7-F?
All 1N5819HW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with 1N5819HW-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 1N5819HW-7-F part is unused and in its original packaging.
Return procedure for 1N5819HW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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