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Diodes Incorporated 1N4448W-7
- Part No.:
- 1N4448W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
1N4448W-7.pdf
- Description:
- DIODE GEN PURP 75V 250MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
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Product details
Overview
1N4448W-7 from Diodes Incorporated is a fast-switching surface-mount silicon switching diode in SOD-123 package, rated for 75 V peak repetitive reverse voltage, 500 mA forward current, and 4.0 ns reverse recovery time. It delivers low forward voltage (0.72 V at 10 mA) and low junction capacitance (4.0 pF at 0 V), making it suitable for high-speed signal routing and clamp protection in digital logic interfaces.
For engineers reviewing the 1N4448W-7 datasheet, 1N4448W-7 pinout, 1N4448W-7 application, or 1N4448W-7 equivalent, key selection criteria include reverse recovery speed, thermal resistance (315 °C/W), JEDEC-qualified reliability, RoHS/Green compliance, and SOD-123 footprint compatibility with automated assembly.
Technical Context
This diode operates as a unidirectional, low-capacitance, fast-recovery rectifier optimized for signal-level switching rather than power conversion. Its 4.0 ns tRR enables use in 10–50 MHz digital timing paths, while its 315 °C/W RθJA reflects thermal performance on standard FR-4 with 1-inch² copper pad.
It exhibits graded doping and optimized carrier lifetime to balance low VF (0.62–1.25 V across 5–150 mA) and minimal stored charge. Reverse leakage remains ≤2.5 µA at 75 V and 25 °C, rising to 50 µA at 150 °C - a critical parameter for high-temperature logic clamping stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time | 4.0 ns - Enables reliable operation in >25 MHz digital edge-rate applications without tail current distortion |
| Peak Repetitive Reverse Voltage | 75 V - Supports clamp protection in 5 V, 12 V, and 24 V logic and interface circuits |
| Forward Current (Continuous) | 500 mA - Sufficient for driving small-signal loads including LED indicators and gate inputs |
| Junction-to-Ambient Thermal Resistance | 315 °C/W - Requires minimum 1-inch² copper pour for sustained 500 mA operation at +85 °C ambient |
| Total Capacitance | 4.0 pF at 0 V - Minimizes signal loading in high-impedance analog switches and RF detector nodes |
| Forward Voltage | 0.72 V at 10 mA - Reduces voltage drop in level-shifting and active pull-up configurations |
| Operating Temperature Range | −55 °C to +150 °C - Qualified per AEC-Q200 stress requirements for under-hood automotive modules |
Pinout & Package
Package: SOD-123 surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., ground or signal return) in clamp or steering configurations |
| Cathode | Current exit terminal during forward conduction; marked by band | Connected to higher-potential node (e.g., VCC, signal line) to enable clamping or isolation |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4.0 ns reverse recovery time ensures minimal propagation delay in high-frequency logic interfaces |
| Low forward voltage | 0.72 V @ 10 mA reduces power loss and heating in battery-powered signal conditioning stages |
| SOD-123 package | Standardized footprint compatible with automated pick-and-place and reflow soldering (MSL Level 1) |
| JEDEC-qualified reliability | Qualified to AEC-Q200 standards for automotive-grade temperature cycling and humidity exposure |
| Halogen- and antimony-free | Meets <900 ppm Br/Cl and <1000 ppm Sb - compliant with global "Green" manufacturing mandates |
Applications
| Logic-Level Clamping | Digital Signal Steering |
|---|---|
Use Scenario: Protecting CMOS input pins from overvoltage transients in microcontroller I/O banks. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursions to VCC + 0.7 V during ESD or inductive kick events. Use Value: 4.0 ns tRR prevents latch-up by clearing stored charge before next clock edge in 20+ MHz systems. | Use Scenario: Isolating bidirectional data lines between mixed-voltage domains (e.g., 3.3 V MCU ↔ 5 V peripheral). IC Role / Device Role / Timing Role: Passive level translator using forward-biased anode-cathode path to steer current directionally. Use Value: 4.0 pF capacitance avoids signal integrity degradation on 10–50 MHz SPI/I²C buses. |
| High-Speed Oscillator Snubbing | Automotive Sensor Interface Protection |
Use Scenario: Damping ringing in crystal oscillator feedback paths of real-time clocks and microcontrollers. IC Role / Device Role / Timing Role: Low-capacitance snubber diode placed across crystal terminals to absorb high-frequency energy. Use Value: 4.0 pF CT minimizes frequency pulling while 0.72 V VF ensures effective clipping without DC bias shift. | Use Scenario: Transient suppression on LIN bus or analog sensor lines in engine control units. IC Role / Device Role / Timing Role: Primary clamping element in TVS-assisted protection networks for ISO 16750-2 pulse testing. Use Value: −55 °C to +150 °C operating range and AEC-Q200 qualification ensure robustness in under-hood environments. |
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 | Identical SOD-123 package; 4.0 ns tRR; slightly higher VF (0.75 V @ 10 mA) and lower VRWM (100 V vs. 75 V) | Better suited for higher-voltage transient suppression where reverse margin >75 V is required | Select when system-level reverse stress exceeds 75 V but speed and footprint must be preserved |
| BAS16W-7-F | Same package; 4.0 ns tRR; lower VF (0.85 V @ 100 mA) but higher leakage (≤50 µA @ 75 V, 25 °C) | Preferred in low-power always-on sensor nodes where leakage-induced quiescent current matters less than forward efficiency | Choose when forward conduction dominates duty cycle and thermal budget allows higher IR drop |
Compared with 1N4448W-7, 1N4148W-7-F offers higher reverse voltage headroom at identical speed, while BAS16W-7-F trades lower leakage for marginally better conduction efficiency - both retain SOD-123 compatibility but differ in thermal and leakage trade-offs for specific bias conditions.
Availability
1N4448W-7 is available at Aetrix Electronics and suitable for logic-level clamping, digital signal steering, high-speed oscillator snubbing, and automotive sensor interface protection requiring stable component supply across industrial, computing, and automotive production programs.
Supply support for 1N4448W-7 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 1N4448W series belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-reliability signal integrity and transient protection in space-constrained, high-volume surface-mount applications.
FAQ
Is the 1N4448W-7 suitable for automotive applications?
Yes - the 1N4448W-7 is qualified to AEC-Q200 standards and manufactured in IATF 16949-certified facilities. Its −55 °C to +150 °C operating range, JEDEC reliability testing, and halogen-free construction meet automotive environmental and compliance requirements for non-safety-critical modules such as body control units and sensor interfaces.
What is the maximum continuous forward current rating?
The 1N4448W-7 is rated for 500 mA continuous forward current at 25 °C ambient. Derating is required above 25 °C: power dissipation drops linearly to zero at 150 °C, following the 315 °C/W thermal resistance curve on FR-4 with 1-inch² copper pad layout per datasheet Figure 1.
How does the reverse recovery time affect circuit performance?
A 4.0 ns reverse recovery time limits minority carrier storage, enabling clean switching in digital signal paths up to ~50 MHz. In clamping applications, it prevents false triggering by ensuring the diode recovers before the next logic transition, avoiding shoot-through or metastability in high-speed interfaces like USB data lines or clock distribution networks.
Can the 1N4448W-7 replace the through-hole 1N4448 in new designs?
Yes - the 1N4448W-7 provides functionally equivalent electrical performance in a surface-mount SOD-123 package. While not pin-compatible due to differing form factors, it serves the same fast-switching role with improved manufacturability, smaller footprint, and tighter parametric consistency versus legacy axial-leaded versions.
1N4448W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 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:
- 2.5 µA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4448W-7 FAQ
1.How can I place an order for 1N4448W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4448W-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 1N4448W-7 reliable?
The price and inventory of 1N4448W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4448W-7 is usually 5 days.
3.What payment methods are accepted for 1N4448W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4448W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4448W-7?
1N4448W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4448W-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 1N4448W-7?
For technical support, including 1N4448W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4448W-7 requirements.
6.How does Aetrix verify that 1N4448W-7 is sourced from the original manufacturer or authorized distributors?
All 1N4448W-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 1N4448W-7 meets industry standards.
7.What is the process for return or replacement of 1N4448W-7?
All 1N4448W-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4448W-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 1N4448W-7 part is unused and in its original packaging.
Return procedure for 1N4448W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4448W-7 Tags
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1N4448X-TP
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Diodes Incorporated
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