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Microchip Technology 1N914UR/TR
- Part No.:
- 1N914UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N914UR/TR.pdf
- Description:
- SIGNAL OR COMPUTER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:104
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Product details
Overview
1N914UR/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, and 4.0 pF capacitance at 0 V - deployed in high-frequency data line steering and RS-232 interface protection.
For engineers reviewing the 1N914UR/TR datasheet, 1N914UR/TR pinout, 1N914UR/TR application, or 1N914UR/TR equivalent, this page delivers verified package dimensions, military-grade qualification status, low-capacitance performance metrics, thermal resistance values, and RoHS-compliant commercial variants for high-reliability signal routing design.
Technical Context
This diode employs metallurgically bonded double-plug construction in a DO-213AA glass MELF package, enabling stable operation from −65 °C to +175 °C with junction-to-endcap thermal resistance of 100 °C/W. Its fast switching behavior is defined by trr = 5 ns (IF = IR = 10 mA, RL = 100 Ω) and minimal forward voltage drop (VF1 = 0.8 V @ 10 mA).
The device supports high-density SMT placement due to its 0.2 g mass and standardized EIA-296 tape-and-reel packaging. Polarity is marked by cathode banding; terminals are tin/lead or matte-tin plated per MIL-STD-750, method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time (trr) | 5 ns - enables reliable operation in >10 MHz digital signal steering and transient OR'ing circuits |
| Working Peak Reverse Voltage (VRWM) | 75 V - supports RS-232 and Ethernet 10 Base-T interface clamping without breakdown |
| Junction Temperature Range | −65 °C to +175 °C - certified for extended-range military and aerospace environmental operation |
| Capacitance (C) | 4.0 pF @ 0 V, 1 MHz - minimizes signal distortion on high-speed data lines |
| Forward Voltage (VF1) | 0.8 V @ 10 mA - reduces power loss in low-current logic-level clamping paths |
| Average Rectified Current (IO) | 200 mA @ TA = 75 °C - sufficient for sustained signal conditioning in industrial I/O modules |
| Thermal Resistance (RθJEC) | 100 °C/W - allows direct endcap heat transfer in compact SMT layouts without heatsinking |
Pinout & Package
DO-213AA glass MELF package: hermetically sealed, axial-symmetric cylindrical body with metallurgically bonded double-plug terminations; cathode identified by single black band; 0.2 g mass; dimensions BD = 1.60–1.70 mm, BL = 3.30–3.71 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to source-side signal or power rail in clamping, steering, or blocking configurations |
| Cathode | Forward current exit / reverse-biased terminal | Banded end; tied to reference node (e.g., ground or VCC) for transient suppression or logic-level translation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| Metallurgical double-plug bonding | Ensures mechanical robustness and thermal stability under thermal cycling stress |
| Low 4.0 pF capacitance at 0 V | Maintains signal integrity on >10 MHz data lines without added RC delay |
| MIL-PRF-19500/116 qualification | Validates reliability for defense, avionics, and space-qualified subsystems |
| RoHS-compliant commercial variant | Enables dual-use designs meeting EU environmental compliance without performance trade-off |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Signal Steering |
|---|---|
Use Scenario: Bidirectional voltage clamping on serial communication lines exposed to ESD and cable-induced transients. IC Role / Device Role / Timing Role: Low-capacitance steering diode placed between TX/RX lines and ±15 V rails to shunt overvoltage. Use Value: 5 ns trr ensures clamping action completes before data edge degradation; 4.0 pF avoids signal rise-time degradation. |
Use Scenario: Directional signal routing in transformer-coupled PHY interfaces with shared differential pairs. IC Role / Device Role / Timing Role: Fast-switching diode used in active termination or fail-safe bias networks for MDI/MDIX auto-sensing. Use Value: 75 V VRWM withstands Ethernet surge test waveforms; DO-213AA footprint enables dense PCB layout. |
| LAN Transient Suppression | High-Density Logic Array Clamping |
Use Scenario: Surge protection on unshielded twisted-pair LAN ports subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage TVS-diode hybrid networks for IEEE 802.3 compliance. Use Value: Hermetic sealing prevents parametric shift after repeated 10/700 µs surge events; RθJEC = 100 °C/W sustains pulse energy dissipation. |
Use Scenario: Input protection and level-shifting in TTL/CMOS logic arrays with tight timing margins. IC Role / Device Role / Timing Role: Low-VF signal path diode used in wired-OR gates and bus arbitration circuits. Use Value: 0.8 V VF1 @ 10 mA preserves noise margin; 200 mA IO rating supports fan-out to ≥10 loads. |
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 | Plastic SOD-323 package; trr = 4 ns; C = 4 pF @ 0 V; VRWM = 75 V; not MIL-qualified | Commercial-only industrial controls; lacks hermetic seal and military temperature range | Select when cost-sensitive consumer-grade designs require same electrical specs without qualification overhead |
| 1N914B-TR | Same DO-213AA package; trr = 4 ns; VF1 = 0.85 V @ 10 mA; VRWM = 75 V; JAN-qualified but no JANTXV option | Legacy aerospace programs requiring proven pedigree but not extreme reliability screening | Choose where full JANTXV screening is unnecessary but DO-213AA form factor and MIL-PRF-19500/116 baseline are mandatory |
Compared with 1N914UR/TR, the 1N4148WS-7-F offers marginally faster switching in non-hermetic packaging, while the 1N914B-TR provides identical form factor with slightly relaxed qualification scope - both serve as functional alternatives where full JANTXV screening or RoHS-compliant commercial variants are not required.
Availability
1N914UR/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T signal steering, and LAN transient suppression requiring stable component supply across military, industrial, and telecom programs.
Supply support for 1N914UR/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 1N914UR/TR belongs to Microsemi's legacy MIL-qualified discrete diode family, engineered specifically for high-speed signal integrity and environmental resilience in mission-critical electronic systems.
FAQ
What is the reverse recovery time specification for the 1N914UR/TR?
The 1N914UR/TR has a reverse recovery time (trr) of 5 ns under standard test conditions (IF = IR = 10 mA, RL = 100 Ω). This value is confirmed in the Electrical Characteristics table on page 2 of the official Microsemi datasheet T4-LDS-0279-1. The 1N914UR/TR achieves this performance via metallurgical double-plug construction and low-junction capacitance.
Is the 1N914UR/TR RoHS compliant?
The 1N914UR/TR is RoHS compliant only in its commercial-grade version, indicated by the "e3" suffix in the part nomenclature. Military-grade variants (JAN/JANTX/JANTXV) retain leaded terminations per MIL-STD-750. The 1N914UR/TR datasheet explicitly states RoHS compliance applies to commercial grade only.
What package type does the 1N914UR/TR use?
The 1N914UR/TR uses the DO-213AA glass MELF package - a hermetically sealed, cylindrical surface-mount outline with axial symmetry and cathode band marking. Dimensions are BD = 1.60–1.70 mm and BL = 3.30–3.71 mm, per the Package Dimensions drawing on page 4 of the Microsemi datasheet.
How does the 1N914UR/TR differ from the 1N914?
The 1N914UR/TR is the surface-mount DO-213AA variant of the through-hole 1N914 (DO-35). Both share identical electrical specs including VRWM = 75 V and trr = 5 ns, but the 1N914UR/TR adds hermetic sealing, metallurgical bonding, and MIL-PRF-19500/116 qualification - features absent in the standard 1N914.
What is the maximum operating temperature for the 1N914UR/TR?
The 1N914UR/TR operates across a junction and storage temperature range of −65 °C to +175 °C, as specified in the Maximum Ratings table. This wide range is enabled by hermetic glass packaging and metallurgical bonding - critical for deployment in avionics and downhole industrial equipment where the 1N914UR/TR must sustain thermal shock.
1N914UR/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 @ 50 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 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
1N914UR/TR FAQ
1.How can I place an order for 1N914UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N914UR/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 1N914UR/TR reliable?
The price and inventory of 1N914UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N914UR/TR is usually 5 days.
3.What payment methods are accepted for 1N914UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N914UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N914UR/TR?
1N914UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N914UR/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 1N914UR/TR?
For technical support, including 1N914UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N914UR/TR requirements.
6.How does Aetrix verify that 1N914UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N914UR/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 1N914UR/TR meets industry standards.
7.What is the process for return or replacement of 1N914UR/TR?
All 1N914UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N914UR/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 1N914UR/TR part is unused and in its original packaging.
Return procedure for 1N914UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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