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Microchip Technology 1N4148UR-1E3/TR
- Part No.:
- 1N4148UR-1E3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4148UR-1E3/TR.pdf
- Description:
- DIODE GEN PURP 75V 200MA DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,588
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Product details
Overview
1N4148UR-1E3/TR from Microsemi is a hermetically sealed glass MELF surface-mount switching diode qualified to MIL-PRF-19500/116 (JAN/JANTX/JANTXV levels), featuring 5 ns reverse recovery time, 75 V working peak reverse voltage, 200 mA average rectified current at 75 °C, and 4.0 pF capacitance at 0 V. It serves as a low-capacitance steering or blocking device in high-frequency data line interfaces.
For engineers reviewing the 1N4148UR-1E3/TR datasheet, 1N4148UR-1E3/TR pinout, 1N4148UR-1E3/TR application, or 1N4148UR-1E3/TR equivalent, key selection criteria include reverse recovery time, junction temperature range (–65 °C to +175 °C), thermal resistance (100 °C/W junction-to-endcap), RoHS compliance (e3 suffix), and DO-213AA package compatibility with high-density SMT layouts.
Technical Context
This diode employs metallurgically bonded construction inside a hermetically sealed DO-213AA glass MELF case, enabling stable operation under military-grade reliability requirements. Its double-plug terminal design ensures mechanical robustness and consistent thermal path to the endcap.
The device delivers fast switching performance via minimal carrier storage-evidenced by trr = 5 ns (IF = IR = 10 mA, RL = 100 Ω) and tfr = 20 ns-while maintaining low leakage: IR ≤ 25 nA at 20 V and ≤ 0.5 µA at 75 V, both at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time (trr) | 5 ns - Enables reliable operation in >10 MHz digital signal routing and transient OR'ing circuits. |
| Working Peak Reverse Voltage (VRWM) | 75 V - Supports use in RS-232/RS-422 interface clamping and Ethernet 10 Base-T receiver protection. |
| Capacitance (C) | 4.0 pF @ 0 V - Minimizes signal distortion on high-speed data lines such as LAN and computer bus steering paths. |
| Junction Temperature Range | –65 °C to +175 °C - Allows deployment in extended-temperature industrial and aerospace environments without derating. |
| Average Rectified Current (IO) | 200 mA @ TA = 75 °C - Sustains continuous forward conduction in logic array bias networks and low-power detector circuits. |
| Forward Voltage (VF1) | 0.8 V @ IF = 10 mA - Reduces power loss in low-current signal-level switching applications like level translation. |
Pinout & Package
Package: DO-213AA (Glass MELF, surface-mount, hermetically sealed). Cathode identified by banding on one end of cylindrical glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source-side signal or power rail in steering/blocking configurations. |
| Cathode | Forward current exit / reverse voltage reference | Banded end; ties to load or reference node; defines polarity for transient suppression and logic isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments, supporting MIL-PRF-19500/116 qualification. |
| Metallurgical bonding | Ensures low thermal resistance (RθJEC = 100 °C/W) and mechanical stability during thermal cycling. |
| Low capacitance (4.0 pF) | Preserves signal integrity on high-frequency lines up to 100 MHz without added filtering. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU for commercial-grade variants, with matte-tin plating over copper-clad steel. |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Receiver |
|---|---|
Use Scenario: Clamping ESD transients and overvoltage spikes on serial communication lines. IC Role / Device Role / Timing Role: Signal-level transient suppressor and bidirectional voltage limiter. Use Value: Leverages 75 V VRWM and 5 ns trr to respond before IC damage occurs, while 4.0 pF capacitance avoids signal edge degradation. | Use Scenario: Steering differential receive signals and isolating fault currents in twisted-pair PHY interfaces. IC Role / Device Role / Timing Role: Low-capacitance steering diode in receiver front-end bias networks. Use Value: 0.8 V VF1 at 10 mA enables precise bias control; DO-213AA footprint supports compact layout near magnetics. |
| LAN Signal Integrity | Logic Array Level Translation |
Use Scenario: Blocking DC offset and directing AC-coupled packet data across isolated network segments. IC Role / Device Role / Timing Role: High-speed blocking diode in multi-port switch fabric interconnects. Use Value: 200 mA IO rating sustains burst-mode traffic; 2.8 pF C at 1.5 V minimizes jitter accumulation across gigabit links. | Use Scenario: Isolating TTL/CMOS logic states between non-synchronous subsystems. IC Role / Device Role / Timing Role: Unidirectional level translator and noise barrier in FPGA I/O banks. Use Value: 5 ns trr prevents race conditions during clock-domain crossing; DO-213AA thermal mass stabilizes junction temperature during burst switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148WS-7-F | DO-35 axial package; trr = 4 ns; VF = 1.0 V @ 10 mA; not MIL-qualified. | Requires through-hole PCB layout; lacks hermetic seal and extended temperature capability. | Select when cost-sensitive commercial designs prioritize speed over environmental ruggedness. |
| BAT54C,215 | SOT-23 package; dual common-cathode Schottky; VF = 0.33 V @ 10 mA; trr not specified (Schottky = inherently soft recovery). | Offers lower forward drop but higher capacitance (~10 pF); unsuitable for high-voltage clamping above 30 V. | Choose for low-voltage, high-efficiency steering where VRWM ≤ 30 V and trr < 5 ns is noncritical. |
Compared with 1N4148UR-1E3/TR, the 1N4148WS-7-F trades military qualification and hermetic sealing for faster trr in axial form, while BAT54C,215 sacrifices reverse voltage capability and precision timing for integrated dual-channel Schottky efficiency in space-constrained logic interfaces.
Availability
1N4148UR-1E3/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T receiver circuits, and LAN signal integrity applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4148UR-1E3/TR 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4148UR-1E3/TR belongs to Microsemi's legacy military-qualified discrete diode family, engineered specifically for high-speed signal routing and transient protection in mission-critical systems where hermeticity and MIL-PRF-19500 compliance are mandatory.
FAQ
What is the maximum junction temperature rating for the 1N4148UR-1E3/TR?
The 1N4148UR-1E3/TR has a specified junction and storage temperature range of –65 °C to +175 °C. This wide range supports operation in extreme environments such as avionics bays and downhole oilfield equipment. The rating is validated per MIL-PRF-19500/116 and applies to all qualified versions (JAN, JANTX, JANTXV) of the 1N4148UR-1E3/TR.
Is the 1N4148UR-1E3/TR RoHS compliant?
Yes, the "e3" suffix in 1N4148UR-1E3/TR indicates RoHS compliance for the commercial-grade version, with matte-tin plating over copper-clad steel terminals. MIL-qualified versions (JAN/JANTX/JANTXV) are not RoHS compliant due to lead-based solder requirements per MIL-STD-750. Always verify grade-specific compliance using the full part nomenclature.
What does the "TR" suffix mean in 1N4148UR-1E3/TR?
The "TR" suffix in 1N4148UR-1E3/TR denotes tape-and-reel packaging per EIA-296 standard, intended for automated SMT placement. It confirms the device is supplied in industry-standard reels compatible with pick-and-place machines. This packaging format applies only to the commercial-grade e3 variant and does not affect electrical or thermal specifications of the 1N4148UR-1E3/TR.
How does the DO-213AA package of the 1N4148UR-1E3/TR differ from DO-35 or SOT-23?
The DO-213AA package of the 1N4148UR-1E3/TR is a hermetically sealed glass MELF case optimized for thermal dissipation (RθJEC = 100 °C/W) and high-reliability mounting. Unlike DO-35 (axial, plastic/glass) or SOT-23 (plastic, surface-mount), DO-213AA provides superior hermeticity, tighter dimensional control, and MIL-PRF-19500 qualification-key for 1N4148UR-1E3/TR's target aerospace and defense applications.
Can the 1N4148UR-1E3/TR replace standard 1N4148 diodes in existing designs?
The 1N4148UR-1E3/TR is a direct functional replacement for JEDEC 1N4148 in high-reliability contexts, sharing identical electrical specs (trr, VF, VRWM, C). However, its DO-213AA footprint differs from axial DO-35 or SMD UB packages. Layout adaptation is required unless the original design already uses DO-213AA. The 1N4148UR-1E3/TR adds MIL qualification and hermetic sealing not present in generic 1N4148 variants.
1N4148UR-1E3/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 20 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N4148UR-1E3/TR FAQ
1.How can I place an order for 1N4148UR-1E3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148UR-1E3/TR 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 1N4148UR-1E3/TR reliable?
The price and inventory of 1N4148UR-1E3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148UR-1E3/TR is usually 5 days.
3.What payment methods are accepted for 1N4148UR-1E3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148UR-1E3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148UR-1E3/TR?
1N4148UR-1E3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148UR-1E3/TR 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 1N4148UR-1E3/TR?
For technical support, including 1N4148UR-1E3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148UR-1E3/TR requirements.
6.How does Aetrix verify that 1N4148UR-1E3/TR is sourced from the original manufacturer or authorized distributors?
All 1N4148UR-1E3/TR 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 1N4148UR-1E3/TR meets industry standards.
7.What is the process for return or replacement of 1N4148UR-1E3/TR?
All 1N4148UR-1E3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148UR-1E3/TR, 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 1N4148UR-1E3/TR part is unused and in its original packaging.
Return procedure for 1N4148UR-1E3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148UR-1E3/TR Tags
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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
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BAS16LT1G
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MMSD914T1G
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BAV21W-7-F
Diodes Incorporated
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