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Microchip Technology 1N4148UBCC
- Part No.:
- 1N4148UBCC
- Manufacturer:
- Microchip Technology
- Category:
- Diode Arrays
- Package:
- 3-SMD, No Lead
- Datasheet:
-
1N4148UBCC.pdf
- Description:
- DIODE ARRAY GP 75V 200MA UBC
- Quantity:
- Payment:
- Shipping:
Inventory:2,213
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Product details
Overview
1N4148UBCC from Microsemi is a military-qualified surface-mount silicon switching diode in a ceramic UB package with common cathode polarity, 75 V working peak reverse voltage, 5 ns reverse recovery time, and 0.8 V forward voltage at 10 mA - used in high-frequency RS-232/RS-422 interface networks and Ethernet 10 Base-T receivers.
For engineers reviewing the 1N4148UBCC datasheet, 1N4148UBCC pinout, 1N4148UBCC application, or 1N4148UBCC equivalent, key selection criteria include MIL-PRF-19500/116 qualification level (JANTXV), low 2.8 pF capacitance at 1.5 V, thermal resistance of 120 °C/W junction-to-solder pad, and compatibility with EIA-418D tape-and-reel packaging for automated SMT assembly.
Technical Context
This device implements a unipolar silicon PN junction optimized for fast transient response in signal routing and clamping applications. Its ceramic UB package provides hermetic sealing and stable electrical performance across -65 °C to +200 °C junction temperature range, supporting operation in harsh environments where plastic-packaged equivalents fail.
The 1N4148UBCC is specified with dual reverse current limits (25 nA @ 20 V, 0.5 µA @ 75 V) and two capacitance test conditions (4.0 pF @ 0 V, 2.8 pF @ 1.5 V), confirming its suitability for high-speed digital line termination and ESD protection front-end stages requiring minimal parasitic loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 75 V - maximum continuous DC reverse bias before significant leakage or breakdown in signal line protection circuits |
| Reverse Recovery Time | 5 ns - enables reliable operation up to ~100 MHz switching in data line clamping and waveform shaping |
| Forward Voltage | 0.8 V @ 10 mA - low conduction loss for logic-level signal steering without voltage droop distortion |
| Junction Temperature Range | -65 °C to +200 °C - supports deployment in aerospace, downhole, and military avionics systems |
| Capacitance | 2.8 pF @ 1.5 V - minimizes signal integrity degradation on high-speed differential pairs like RS-422 |
| Average Rectified Current | 200 mA @ 75 °C ambient - sufficient for transient surge absorption in interface I/O protection networks |
| Thermal Resistance J-to-SP | 120 °C/W - allows direct thermal coupling to PCB copper pour for sustained pulse handling without derating |
Pinout & Package
Ceramic surface-mount UB package with gold-plated nickel terminals; hermetically sealed, weight < 0.04 g; dimensions per Microsemi T4-LDS-0281-2: length 2.92–3.25 mm, width 2.16–2.74 mm, height 1.17–1.42 mm; marked with part number, date code, and manufacturer ID.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pad 1 | Anode | Forward current entry point; connected to input signal source in clamping configuration |
| Pad 2 | Cathode | Common cathode node shared across dual-diode variants; tied to reference rail or ground in bidirectional protection |
Key Features
| Feature | Design Value |
|---|---|
| JANTXV qualification per MIL-PRF-19500/116 | Validated reliability for mission-critical defense electronics with full lot traceability and screening |
| Common cathode polarity (CC suffix) | Enables dual-diode functionality in single footprint for balanced signal conditioning or redundant protection paths |
| 2.8 pF capacitance at 1.5 V reverse bias | Reduces high-frequency insertion loss in 10/100 Mbps Ethernet PHY interfaces and USB 1.1 signal lines |
| Hermetic ceramic construction | Prevents moisture ingress and parameter drift under 85 °C/85% RH stress, extending field life beyond 20 years |
| EIA-418D tape-and-reel packaging | Supports high-throughput pick-and-place assembly at > 25,000 UPH with zero nozzle clogging or misfeed events |
Applications
| RS-232 Transceiver Protection | Ethernet 10 Base-T Receiver Clamping |
|---|---|
Use Scenario: Protecting UART-level serial communication lines against ESD and cable-induced transients in industrial PLCs. IC Role / Device Role / Timing Role: Signal-level clamping diode placed between TX/RX pins and ground or VCC rail. Use Value: 5 ns trr ensures fast turn-off during data edge transitions, preventing signal smearing at 115.2 kbps baud rates. | Use Scenario: Front-end transient suppression on twisted-pair Ethernet receiver inputs operating at 10 Mbps. IC Role / Device Role / Timing Role: Low-capacitance shunt element limiting common-mode surges while preserving signal rise/fall times. Use Value: 2.8 pF capacitance avoids degrading 100 ns pulse edges required by IEEE 802.3 Clause 14 compliance testing. |
| Avionics Data Bus Interface | Military Radio IF Stage Coupling |
Use Scenario: Isolating ARINC 429 bus receivers from induced lightning transients in aircraft flight control systems. IC Role / Device Role / Timing Role: Bidirectional clamping pair (anode-to-rail, cathode-to-ground) using common-cathode topology. Use Value: -65 °C to +200 °C operating range maintains specification compliance across cabin pressurization cycles and engine bay thermal excursions. | Use Scenario: AC coupling and DC blocking in 70 MHz IF amplifier chains within tactical HF/VHF radios. IC Role / Device Role / Timing Role: High-isolation blocking diode in tuned tank circuit bias networks. Use Value: 75 V VRWM withstands RF envelope peaks exceeding 50 Vp-p without leakage-induced desensitization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F (Diodes Inc.) | Plastic SOD-123 package; 4 ns trr; 75 V VRWM; RoHS-compliant but not MIL-qualified | Limited to commercial-grade industrial equipment; unsuitable for flight-critical or space-constrained mil-aero designs | Select when cost and volume production outweigh military reliability requirements |
| CMKD7003 TR (Central Semiconductor) | Dual common-cathode die in SOT-23; 4 ns trr; 100 V V(BR); 100 mA IO rating | Higher voltage margin but lower current rating; requires layout revision due to 3-pin SOT-23 footprint | Choose for dual-diode redundancy in compact consumer IoT gateways where 200 mA IO is not required |
Compared with 1N4148UBCC, the 1N4148W-7-F offers faster switching but lacks hermeticity and MIL qualification, while CMKD7003 TR provides dual functionality in smaller area but sacrifices current handling and thermal robustness - making 1N4148UBCC optimal for high-reliability, thermally demanding, single-diode signal path roles.
Availability
1N4148UBCC is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T receiver clamping, and avionics data bus isolation requiring stable component supply across extended product lifecycles.
Supply support for 1N4148UBCC 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
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete devices, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4148UBCC belongs to Microsemi's legacy military diode product line, engineered specifically for signal integrity preservation and long-term parametric stability in mission-critical electronic systems exposed to extreme thermal, mechanical, and radiation stress.
FAQ
What does the 'CC' suffix indicate in 1N4148UBCC?
The 'CC' suffix in 1N4148UBCC denotes Common Cathode polarity, meaning both diode anodes are accessible as separate terminals while sharing a single cathode connection. This configuration supports dual-diode applications such as balanced signal clamping or bidirectional transient protection without requiring two discrete packages. The 1N4148UBCC leverages this topology within its ceramic UB footprint to maintain signal symmetry and reduce board space in high-density military PCB layouts.
Is 1N4148UBCC qualified to MIL-PRF-19500/116?
Yes, the 1N4148UBCC is fully qualified to MIL-PRF-19500/116 at the JANTXV level, including rigorous screening for burn-in, temperature cycling, and hermeticity. This qualification ensures compliance with military standards for reliability, traceability, and environmental survivability - critical for deployment in defense electronics where failure is not an option. Documentation for 1N4148UBCC qualification is provided in Microsemi's T4-LDS-0281-2 datasheet.
How does the ceramic UB package of 1N4148UBCC differ from plastic SMD diodes?
The ceramic UB package of 1N4148UBCC provides hermetic sealing, enabling stable electrical parameters over -65 °C to +200 °C and immunity to moisture-induced parameter shift. Unlike plastic SMD diodes (e.g., SOD-123), it eliminates delamination risk under thermal shock and supports long-term reliability in sealed enclosures. The 1N4148UBCC's ceramic construction also delivers superior thermal resistance (120 °C/W J-to-SP) compared to typical plastic packages, allowing higher sustained power dissipation in compact layouts.
What is the maximum average forward current rating for 1N4148UBCC?
The 1N4148UBCC has a maximum average rectified forward current (IO) of 200 mA at an ambient temperature of 75 °C, derating linearly to zero at 150 °C per Figure 1 in the datasheet. This rating applies to full-wave rectification with 50/60 Hz sine-wave input and 180° conduction angle. For pulsed operation, the 1N4148UBCC supports non-repetitive surge currents up to 2 A peak (8.3 ms half-sine), making it suitable for transient suppression in interface I/O protection circuits.
Can 1N4148UBCC be used in high-frequency RF applications?
Yes, the 1N4148UBCC is suitable for RF applications up to approximately 100 MHz due to its 5 ns reverse recovery time and low 2.8 pF capacitance at 1.5 V reverse bias. It has been deployed in IF coupling, antenna switch bias networks, and RF detector front-ends in military radios. However, it is not characterized for GHz-range operation or small-signal RF gain; for those uses, purpose-built RF Schottky diodes like the SMS7630 are recommended instead of the 1N4148UBCC.
1N4148UBCC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 3-SMD, No Lead
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io) (per Diode):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 75 V
- Operating Temperature - Junction:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UBC
1N4148UBCC FAQ
1.How can I place an order for 1N4148UBCC through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148UBCC 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 1N4148UBCC reliable?
The price and inventory of 1N4148UBCC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148UBCC is usually 5 days.
3.What payment methods are accepted for 1N4148UBCC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148UBCC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148UBCC?
1N4148UBCC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148UBCC 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 1N4148UBCC?
For technical support, including 1N4148UBCC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148UBCC requirements.
6.How does Aetrix verify that 1N4148UBCC is sourced from the original manufacturer or authorized distributors?
All 1N4148UBCC 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 1N4148UBCC meets industry standards.
7.What is the process for return or replacement of 1N4148UBCC?
All 1N4148UBCC units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148UBCC, 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 1N4148UBCC part is unused and in its original packaging.
Return procedure for 1N4148UBCC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148UBCC Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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