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Diodes Incorporated 1N4448HWT-7
- Part No.:
- 1N4448HWT-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1N4448HWT-7.pdf
- Description:
- DIODE GEN PURP 80V 125MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:203,160
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Product details
Overview
1N4448HWT from Diodes Incorporated is a surface-mount fast-switching silicon signal diode in SOD523 package, rated for 80 V peak repetitive reverse voltage, 250 mA forward current, and 4.0 ns reverse recovery time. It delivers high conductance with VF = 0.62 V at IF = 5 mA and low junction capacitance (CT ≤ 3.0 pF), enabling use in high-speed digital logic clamping and waveform shaping circuits.
For engineers reviewing the 1N4448HWT datasheet, 1N4448HWT pinout, 1N4448HWT application, or 1N4448HWT equivalent, key selection criteria include ultra-fast trr, low forward voltage at low currents, minimal parasitic capacitance, thermal derating behavior up to +150°C, and compatibility with automated SMT assembly on FR-4 boards.
Technical Context
This diode operates as a unidirectional, low-capacitance switching element optimized for signal integrity in high-frequency digital systems. Its 4.0 ns reverse recovery time and 3.0 pF total capacitance support clean edge transitions in 10–50 MHz clock distribution and data line protection.
The device uses an alloy-42 leadframe with matte tin plating, achieving 833 °C/W junction-to-ambient thermal resistance on standard FR-4 layout. Its -55°C to +150°C operating range and AEC-Q200-compatible construction make it suitable for automotive body electronics and industrial control I/O conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM / VRRM | 100 V / 80 V - supports transient suppression up to 100 V non-repetitive, safe DC blocking to 80 V in continuous operation |
| IFM | 250 mA - sufficient for logic-level signal routing and low-power clamp duty without thermal runaway |
| trr | 4.0 ns - enables reliable switching in >25 MHz digital waveforms without tail current distortion |
| VF @ 5 mA | 0.62 V - minimizes voltage drop in bias networks and level-shifting paths |
| CT @ 0.5 V | ≤3.0 pF - preserves signal rise/fall times in high-speed data lines and RF detector inputs |
| RθJA | 833 °C/W - requires minimal PCB copper area for thermal management in space-constrained layouts |
| TJ Range | -55°C to +150°C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
Package: SOD523 - ultra-small plastic surface-mount package (1.25 mm × 0.85 mm × 0.65 mm), moisture sensitivity level 1, cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in clamp or rectifier configuration; soldered to pad "A" per Diodes' recommended layout |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by visible band; tied to higher-potential rail or signal line needing clamping; pad "K" in layout |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4.0 ns trr ensures minimal propagation delay skew in clock/data path clamping |
| Ultra-small SOD523 footprint | 1.25 mm × 0.85 mm saves >60% board area vs. SOD-123 in dense signal routing layers |
| Low forward voltage at low current | 0.62 V @ 5 mA reduces power loss in always-on bias networks and pull-up circuits |
| Low junction capacitance | ≤3.0 pF avoids signal attenuation and phase shift in >10 MHz analog/digital interfaces |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| High-Speed Logic Clamping | Digital Signal Conditioning |
|---|---|
Use Scenario: Protecting CMOS input pins from overshoot/undershoot during hot-plug or ESD events in FPGA I/O banks. IC Role / Device Role: Fast-acting shunt clamp limiting voltage excursions to ±0.7 V beyond supply rails. Use Value: 4.0 ns trr prevents latch-up by clearing stored charge before next logic edge; 3.0 pF CT avoids degrading 100 Mbps signal integrity. | Use Scenario: Sharpening slow-rising clock edges from microcontroller GPIO outputs driving multiple loads. IC Role / Device Role: Edge accelerator via nonlinear conduction that clips negative swing and accelerates positive transition. Use Value: Low VF (0.62 V @ 5 mA) and fast turn-off minimize added jitter; SOD523 size allows placement directly at load input. |
| Automotive Body Control I/O | Industrial Sensor Interface Protection |
Use Scenario: Input protection for LIN bus transceiver enable pins exposed to load-dump transients in door module ECUs. IC Role / Device Role: Reverse-polarity and overvoltage clamp on 12 V supply-sensed control lines. Use Value: 80 V VRRM withstands ISO 7637-2 Pulse 1 (−100 V); -55°C to +150°C rating matches under-dash thermal profile. | Use Scenario: Overvoltage suppression on analog output lines of 4–20 mA current-loop sensors in factory automation PLCs. IC Role / Device Role: Bidirectional transient suppressor across signal and return paths using back-to-back configuration. Use Value: Matched VF and trr ensure symmetrical clamping response; RoHS 3 compliance meets EU industrial equipment directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54CWT-7 | Schottky architecture; VF = 0.33 V @ 10 mA; trr not specified (inherently faster); VR = 30 V | Limited to ≤30 V systems; better for low-VF bias but unsuitable for 80 V clamping | Select when forward loss dominates design and reverse voltage stays below 30 V |
| 1N4148W-7-F | Same silicon process but SOD-123 package; VF = 0.72 V @ 10 mA; trr = 4.0 ns; VR = 100 V | Larger footprint (2.7 mm × 1.6 mm); 2.2× higher RθJA (1800 °C/W) | Choose only if legacy SOD-123 layout reuse is required and thermal margin permits |
Compared with BAT54CWT-7 and 1N4148W-7-F, the 1N4448HWT uniquely balances 80 V blocking, 4.0 ns switching, and SOD523 miniaturization-making it optimal for space-constrained, medium-voltage digital interface protection where Schottky leakage or larger packages are unacceptable.
Availability
1N4448HWT is available at Aetrix Electronics and suitable for high-speed logic clamping, automotive body control I/O, and industrial sensor interface protection requiring stable component supply across extended temperature ranges and automated SMT production.
Supply support for 1N4448HWT 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 the Americas.
The 1N4448HWT belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-density, high-frequency signal routing in automotive, industrial, and computing applications where speed, size, and reliability are co-critical.
FAQ
What is the maximum reverse voltage the 1N4448HWT can block continuously?
The 1N4448HWT has a peak repetitive reverse voltage (VRRM) rating of 80 V, meaning it can continuously block up to 80 V DC or sinusoidal reverse voltage without breakdown. Its non-repetitive peak reverse voltage (VRM) is 100 V, allowing brief transient tolerance beyond the continuous rating.
Is the 1N4448HWT suitable for automotive applications?
Yes-the 1N4448HWT is manufactured in IATF 16949-certified facilities and meets AEC-Q200 stress test requirements for passive components. Its -55°C to +150°C operating range, lead-free/halogen-free construction, and robust thermal performance make it qualified for under-hood and body-control module use.
How does the SOD523 package affect thermal performance?
The SOD523 package delivers 833 °C/W junction-to-ambient thermal resistance when mounted on FR-4 with Diodes' recommended pad layout. Its small size limits absolute power dissipation (PD = 150 mW), so designers must observe the derating curve-e.g., max 100 mW at +85°C ambient-to avoid exceeding TJ = +150°C.
Can the 1N4448HWT replace the 1N4148 in existing designs?
It can replace the through-hole 1N4148 in new SMT designs, but not as a direct drop-in due to different package (SOD523 vs. DO-35) and slightly lower VF (0.62 V vs. 0.72 V @ 5 mA). Electrical specs are closely matched (same trr = 4.0 ns, VRRM = 80 V), but layout redesign and requalification are required for SMT implementation.
1N4448HWT-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io):
- 125mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 80 V
- Capacitance @ Vr, F:
- 3pF @ 0.5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4448HWT-7 FAQ
1.How can I place an order for 1N4448HWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4448HWT-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 1N4448HWT-7 reliable?
The price and inventory of 1N4448HWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4448HWT-7 is usually 5 days.
3.What payment methods are accepted for 1N4448HWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4448HWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4448HWT-7?
1N4448HWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4448HWT-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 1N4448HWT-7?
For technical support, including 1N4448HWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4448HWT-7 requirements.
6.How does Aetrix verify that 1N4448HWT-7 is sourced from the original manufacturer or authorized distributors?
All 1N4448HWT-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 1N4448HWT-7 meets industry standards.
7.What is the process for return or replacement of 1N4448HWT-7?
All 1N4448HWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4448HWT-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 1N4448HWT-7 part is unused and in its original packaging.
Return procedure for 1N4448HWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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