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Diodes Incorporated 1N4448HWS-7
- Part No.:
- 1N4448HWS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
1N4448HWS-7.pdf
- Description:
- DIODE GEN PURP 80V 250MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,962
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Product details
Overview
1N4448HWS from Diodes Incorporated is a surface-mount fast-switching silicon signal diode in SOD323 package, rated for 80 V peak repetitive reverse voltage, 500 mA forward surge current, and 4.0 ns reverse recovery time. It delivers high conductance with 0.72 V forward voltage at 10 mA and supports general-purpose switching in compact PCB layouts.
For engineers reviewing the 1N4448HWS datasheet, 1N4448HWS pinout, 1N4448HWS application, or 1N4448HWS equivalent, key selection criteria include reverse recovery speed, low forward voltage at low-to-moderate currents, thermal resistance (625 °C/W), and automotive-grade availability via the AEC-Q101-qualified 1N4448HWSQ variant.
Technical Context
This diode operates as a unidirectional, low-capacitance (≤3.5 pF at 0 V) switching element optimized for high-speed digital and analog signal routing. Its 4.0 ns trr and 0.72 V VF at 10 mA enable clean edge transitions in waveform shaping, clamping, and protection circuits where minimal storage charge and fast turn-off are critical.
The SOD323 package provides mechanical robustness with moisture sensitivity level 1 (J-STD-020), matte tin-plated alloy 42 leads, and UL 94V-0 molding compound - supporting reflow compatibility and long-term reliability in industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 100 V non-repetitive peak reverse voltage - defines maximum transient overvoltage tolerance without avalanche breakdown |
| VRRM | 80 V peak repetitive reverse voltage - sets continuous blocking capability in AC/DC switching paths |
| trr | 4.0 ns reverse recovery time - enables operation up to ~85 MHz in clipping/switching applications |
| VF @ 10 mA | 0.72 V forward voltage - ensures low conduction loss in logic-level signal steering and bias networks |
| CT @ 0 V | 3.5 pF junction capacitance - minimizes signal distortion and crosstalk in RF and high-frequency timing circuits |
| RθJA | 625 °C/W thermal resistance - requires careful PCB copper area design to sustain >100 mW power dissipation at ambient |
| IFSM | 4.0 A non-repetitive surge current - supports ESD pulse handling and inductive kick absorption |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount plastic case (1.30 × 1.70 mm body, 0.30 mm lead pitch), cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in forward-biased configuration; must be routed with low-inductance trace for fast switching |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential node or ground reference in clamp/protection roles |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4.0 ns trr enables use in >50 MHz clock line conditioning and pulse sharpening |
| Low forward voltage | 0.72 V at 10 mA reduces voltage drop in level-shifting and active bias networks |
| Small SOD323 footprint | 1.3 × 1.7 mm outline saves board space in dense portable and IoT designs |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Logic-Level Signal Clamping | Digital I/O Protection |
|---|---|
Use Scenario: Limiting input voltage excursions on microcontroller GPIO pins exposed to external signals. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above VCC + 0.7 V or below GND − 0.7 V. Use Value: Prevents latch-up and ESD damage using sub-4 ns turn-on response and low dynamic impedance. | Use Scenario: Safeguarding UART, SPI, or I²C lines against bus contention and hot-plug transients. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between signal line and local rail. Use Value: 3.5 pF capacitance avoids signal integrity degradation at 10+ Mbps data rates. |
| Waveform Shaping | High-Frequency Detector |
Use Scenario: Sharpening edges of square waves in clock distribution or test equipment trigger paths. IC Role / Device Role / Timing Role: Series-connected switch that removes negative undershoot and rounds positive peaks. Use Value: 4.0 ns trr preserves rise/fall times below 10 ns while suppressing ringing. | Use Scenario: Demodulating AM signals or detecting envelope peaks in RF front-end receivers. IC Role / Device Role / Timing Role: Low-capacitance anode-grounded detector diode in passive envelope follower. Use Value: 3.5 pF CT and 0.72 V VF ensure accurate detection up to 100 MHz with minimal loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F | Same SOD323 package; 4 ns trr, but VF = 0.75 V @ 10 mA and CT = 4.0 pF | Slightly higher capacitance limits use in >80 MHz signal paths | Select when legacy qualification or second-source validation is required |
| BAT54C-7-F | SC-70 package; dual common-cathode Schottky; VF = 0.33 V @ 10 mA, trr not specified (Schottky = no recovery delay) | Lower VF improves efficiency but lacks precise reverse recovery control for timing-critical clamping | Prefer for low-voltage biasing or RF detector where ultra-low VF outweighs trr specification need |
Compared with 1N4448HWS, the 1N4148W-7-F offers identical speed but marginally higher VF and CT, while the BAT54C-7-F trades deterministic trr for Schottky advantages - making the 1N4448HWS optimal for applications requiring guaranteed 4 ns recovery and stable reverse characteristics.
Availability
1N4448HWS is available at Aetrix Electronics and suitable for logic-level clamping, digital I/O protection, waveform shaping, and high-frequency detection requiring stable component supply across industrial automation, consumer electronics, and communications infrastructure.
Supply support for 1N4448HWS 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 1N4448HWS belongs to Diodes' general-purpose fast-switching diode product line, engineered for reliable performance in signal integrity, protection, and timing-critical functions across commercial and automotive temperature ranges.
FAQ
What is the maximum operating temperature for the 1N4448HWS?
The 1N4448HWS has a specified operating junction temperature range of −55 °C to +150 °C. At ambient temperatures above +85 °C, derating per Figure 1 applies: power dissipation must be reduced linearly from 200 mW at 25 °C to zero at 150 °C, based on its 625 °C/W thermal resistance on FR-4 board.
Is the 1N4448HWS suitable for automotive applications?
The base 1N4448HWS is not AEC-Q101 qualified. However, the functionally identical 1N4448HWSQ variant is fully AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949-certified facilities - making it the designated version for automotive infotainment, body control, and ADAS subsystems.
How does the 1N4448HWS compare to Schottky diodes like BAT54 series?
Unlike Schottky diodes, the 1N4448HWS is a silicon PN junction device with defined 4.0 ns reverse recovery time and higher reverse blocking (80 V vs. typically 30 V for BAT54). It exhibits higher VF but superior reverse leakage stability and predictable trr - critical in timing-sensitive clamping where Schottky soft recovery causes ambiguity.
What is the polarity marking convention for the SOD323 package?
The cathode is marked by a visible band on the top surface of the SOD323 package. When viewed from the top with the band on the left, the left pad is cathode and the right pad is anode. This matches standard SOD323 orientation diagrams in Diodes' package outline document DS30196.
1N4448HWS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 150 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 80 V
- Capacitance @ Vr, F:
- 3.5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4448HWS-7 FAQ
1.How can I place an order for 1N4448HWS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4448HWS-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 1N4448HWS-7 reliable?
The price and inventory of 1N4448HWS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4448HWS-7 is usually 5 days.
3.What payment methods are accepted for 1N4448HWS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4448HWS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4448HWS-7?
1N4448HWS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4448HWS-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 1N4448HWS-7?
For technical support, including 1N4448HWS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4448HWS-7 requirements.
6.How does Aetrix verify that 1N4448HWS-7 is sourced from the original manufacturer or authorized distributors?
All 1N4448HWS-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 1N4448HWS-7 meets industry standards.
7.What is the process for return or replacement of 1N4448HWS-7?
All 1N4448HWS-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4448HWS-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 1N4448HWS-7 part is unused and in its original packaging.
Return procedure for 1N4448HWS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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