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NXP Semiconductors 1N4148,143
- Part No.:
- 1N4148,143
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4148,143.pdf
- Description:
- DIODE GEN PURP 100V 200MA ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:7,242
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Product details
Overview
1N4148,143 from Nexperia is a high-speed switching diode in a hermetically sealed glass SOD27 (DO-35) package, with 4 ns max reverse recovery time, 100 V repetitive peak reverse voltage, and 450 mA repetitive peak forward current. It serves as a general-purpose fast-switching element in signal routing, clamping, and protection circuits across consumer and industrial electronics.
For engineers reviewing the 1N4148,143 datasheet, 1N4148,143 pinout, 1N4148,143 application, or 1N4148,143 equivalent, key selection criteria include reverse recovery speed, junction temperature rating up to 200 °C, low diode capacitance (≤4 pF), and compatibility with automated axial-leaded assembly processes.
Technical Context
The 1N4148,143 is fabricated using planar silicon technology and optimized for rapid turn-off behavior, enabling reliable operation in digital logic interfacing and pulse shaping at frequencies up to several hundred MHz. Its low stored charge and controlled minority-carrier lifetime directly support sub-10 ns switching transitions.
Thermal performance is defined under standardized mounting conditions: Rth(j-a) = 350 K/W on FR4 PCB with 10 mm lead length, and maximum junction temperature of 200 °C ensures robustness in thermally constrained environments without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports reverse blocking in 48 V and lower DC supply rails without breakdown |
| trr | 4 ns max - enables clean edge preservation in >10 MHz square-wave signal paths |
| Cd | 4 pF max at 0 V - minimizes capacitive loading on high-impedance nodes and RF-sensitive inputs |
| IFRM | 450 mA - handles transient surge currents in logic-level clamp and snubber applications |
| Tj max | 200 °C - allows sustained operation in enclosed enclosures or near heat-generating components |
| VF | 1.0 V max at IF = 10 mA - ensures low forward drop in bias and level-shift networks |
| Rth(j-a) | 350 K/W - defines thermal derating slope for ambient temperatures above 25 °C |
Pinout & Package
Package: Hermetically sealed glass SOD27 (DO-35), axial-leaded, 2-terminal device. Cathode indicated by a single black band on the glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connects to higher-potential node during conduction; requires trace width sufficient for 450 mA peak |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Marked end ties to reference or lower-potential node; critical for correct polarity in clamping and protection |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | 4 ns trr enables use in >100 MHz clock distribution and data line steering |
| Hermetic glass package | SOD27 construction provides long-term moisture resistance and stable parameter drift over 15+ years |
| Low leakage current | 25 nA max at 20 V reverse bias preserves signal integrity in high-impedance sample-and-hold circuits |
| Wide junction temperature range | −65 °C to +200 °C operation supports deployment in automotive engine compartments and industrial motor drives |
Applications
| Digital Logic Clamping | ESD Protection Interface |
|---|---|
Use Scenario: Preventing negative voltage excursions beyond −0.3 V on CMOS input pins during hot-plug events. IC Role / Device Role / Timing Role: Fast clamping diode shunting excess energy to ground before internal ESD structures activate. Use Value: 4 ns trr and low Cd ensure minimal signal distortion while handling 1 kV HBM transients. | Use Scenario: Safeguarding USB 2.0 D+/D− lines against contact discharge in portable docking stations. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed before TVS arrays and series resistors. Use Value: 100 V VRRM withstands induced surges while 25 nA leakage avoids bus pull-down errors. |
| Pulse Shaping Network | Sample-and-Hold Bias Steering |
Use Scenario: Sharpening TTL-compatible trigger edges in oscilloscope vertical deflection amplifiers. IC Role / Device Role / Timing Role: Edge accelerator in diode-resistor differentiator configuration. Use Value: Sub-10 ns transition fidelity maintained by low stored charge and 4 pF capacitance. | Use Scenario: Isolating hold capacitor from op-amp output during acquisition phase in 12-bit ADC front-ends. IC Role / Device Role / Timing Role: Precision analog switch element controlling charge transfer path. Use Value: 1.0 V VF tolerance ensures predictable offset error; 25 nA IR prevents capacitor leakage-induced droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W,115 | SOD-123 surface-mount package; identical electrical specs except Rth(j-a) = 290 K/W | Required for reflow-soldered PCBs; unsuitable for through-hole prototyping or axial wire-wrap | Select when board space is constrained and automated SMT assembly is used. |
| BAS16,215 | Same SOD-123 package; trr = 4 ns, but VRRM = 80 V and IFRM = 250 mA | Limited to ≤24 V systems; lower surge capability reduces margin in noisy industrial I/O | Choose only if 80 V rating suffices and footprint compatibility with existing SMD layouts is critical. |
Compared with 1N4148,143, the 1N4148W,115 offers identical switching performance in a smaller footprint but requires SMT process validation, while the BAS16,215 trades 20 V reverse margin and 200 mA peak current for tighter integration-neither is pin-compatible due to differing axial vs. surface-mount form factors.
Availability
1N4148,143 is available at Aetrix Electronics and suitable for high-volume production, industrial control interface design, and consumer electronics repair requiring stable component supply and long-lifecycle availability.
Supply support for 1N4148,143 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division.
The 1N4148,143 belongs to Nexperia's high-speed switching diode product line, engineered for precision timing-critical signal routing and robust transient suppression in automotive, industrial, and computing systems.
FAQ
What is the maximum reverse recovery time specified for the 1N4148,143?
The 1N4148,143 has a maximum reverse recovery time (trr) of 4 ns when switched from IF = 10 mA to IR = 60 mA with RL = 100 Ω and measured at IR = 1 mA. This value is guaranteed across the full operating temperature range and is critical for maintaining signal integrity in high-frequency digital interfaces where the 1N4148,143 is deployed.
Does the 1N4148,143 have a cathode marking, and how is it identified?
Yes, the 1N4148,143 features a single black band on the glass body indicating the cathode terminal. This marking aligns with JEDEC DO-35 and IEC SOD27 standards and must be oriented toward the lower-potential side of the circuit. The anode is the unbanded end, and correct orientation is essential for proper clamping and rectification function in all 1N4148,143 implementations.
What is the continuous forward current rating for the 1N4148,143 at room temperature?
The 1N4148,143 is rated for a continuous forward current (IF) of 200 mA at Tamb = 25 °C with 10 mm lead length on FR4 PCB. This rating decreases linearly with rising ambient temperature per Fig.2 in the datasheet, reaching zero at approximately 175 °C. Derating must be applied in real-world layouts where copper area or airflow differs from the test condition.
Can the 1N4148,143 be used in place of the 1N4448?
The 1N4148,143 and 1N4448 share the same SOD27 package and core specifications but differ in forward voltage: the 1N4148,143 specifies VF ≤ 1.0 V at IF = 10 mA, while the 1N4448 guarantees VF = 0.62–0.72 V at IF = 5 mA. Substitution is possible in non-critical bias networks, but not recommended in low-voltage logic interfaces where the 1N4448's tighter VF tolerance matters. Both remain valid 1N4148,143 alternatives only if forward drop is verified in circuit simulation.
What is the thermal resistance from junction to ambient for the 1N4148,143?
The 1N4148,143 has a thermal resistance from junction to ambient (Rth(j-a)) of 350 K/W when mounted on an FR4 PCB with 10 mm lead length and no metallization pad. This value assumes natural convection only and forms the basis for thermal derating calculations. For designs exceeding 100 mW average power dissipation, board layout enhancements such as thermal relief pads or copper pours should be evaluated to maintain safe junction temperatures below 200 °C.
1N4148,143 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 25 nA @ 20 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
- Operating Temperature - Junction:
- 200°C (Max)
1N4148,143 FAQ
1.How can I place an order for 1N4148,143 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148,143 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 1N4148,143 reliable?
The price and inventory of 1N4148,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148,143 is usually 5 days.
3.What payment methods are accepted for 1N4148,143?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148,143 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148,143?
1N4148,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148,143 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 1N4148,143?
For technical support, including 1N4148,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148,143 requirements.
6.How does Aetrix verify that 1N4148,143 is sourced from the original manufacturer or authorized distributors?
All 1N4148,143 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 1N4148,143 meets industry standards.
7.What is the process for return or replacement of 1N4148,143?
All 1N4148,143 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148,143, 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 1N4148,143 part is unused and in its original packaging.
Return procedure for 1N4148,143:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148,143 Tags
-
1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
Micro Commercial Co
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1N4148TR
onsemi
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MMSD4148T1G
onsemi
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MMBD914LT3G
onsemi
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BAS16HT1G
onsemi
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1N914BWT
onsemi
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BAS21LT1G
onsemi
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LL4148
onsemi
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BAS16LT1G
onsemi
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MMSD914T1G
onsemi
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BAV21W-7-F
Diodes Incorporated
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