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Microchip Technology 1N4114UR-1
- Part No.:
- 1N4114UR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4114UR-1.pdf
- Description:
- DIODE ZENER 20V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,709
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Product details
Overview
1N4114UR-1 from Microsemi is a 500 mW surface-mount Zener diode in DO-213AA (SOD-80) glass MELF package, rated for 20.0 V nominal Zener voltage at 250 mA test current, with ±5% tolerance, 150 Ω maximum dynamic impedance, and +0.090 %/°C temperature coefficient. It delivers stable voltage regulation in high-reliability power supply reference and precision biasing circuits across military and industrial environments.
For engineers reviewing the 1N4114UR-1 datasheet, 1N4114UR-1 pinout, 1N4114UR-1 application, or 1N4114UR-1 equivalent, key selection criteria include its hermetically sealed glass MELF construction, JANS-qualified reliability up to 175 °C junction temperature, low 0.01 µA reverse leakage at 15.2 V, and radiation-hardened performance per Microsemi MicroNote 050.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with controlled Zener voltage (VZ = 20.0 V @ IZT = 250 mA), low noise density (1 µV/√Hz), and minimal capacitance (≈19 pF). Its metallurgically bonded internal structure ensures mechanical robustness under thermal cycling and shock.
The 1N4114UR-1 exhibits a positive temperature coefficient (+0.090 %/°C), enabling predictable drift compensation in series-connected references. It is qualified per MIL-PRF-19500/435 at JAN, JANTX, JANTXV, and JANS levels, supporting operation from –65 °C to +175 °C with 100 °C/W junction-to-end-cap thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 20.0 V at 250 mA - precise regulation point for mid-range reference designs |
| Power Dissipation | 500 mW - supports stable operation up to 125 °C case temperature before linear derating |
| Dynamic Impedance ZZT | 150 Ω max - ensures low AC impedance for ripple rejection in feedback loops |
| Reverse Leakage IR | 0.01 µA @ 15.2 V - enables ultra-low standby current in battery-backed circuits |
| Temp. Coefficient αVZ | +0.090 %/°C - allows predictable drift modeling for temperature-compensated references |
| Noise Density | 1 µV/√Hz - critical for low-noise analog signal conditioning and sensor excitation |
| Junction Temp. Range | –65 °C to +175 °C - validated for aerospace, downhole, and extended-temperature industrial use |
Pinout & Package
DO-213AA (SOD-80) glass MELF package: hermetically sealed, cylindrical, axial-symmetric body with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by single dark band; polarity: banded end is cathode (positive during Zener operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; defines Zener voltage drop direction |
| Cathode | Regulated output node | Banded end; supplies stable 20.0 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables long-term stability and moisture immunity in harsh environments without conformal coating |
| MIL-PRF-19500/435 qualification | Validated reliability for JANS-level space and defense applications with full screening and traceability |
| Metallurgical bond integrity | Prevents interfacial delamination under thermal stress, ensuring consistent VZ over 10+ year lifetimes |
| Radiation hardness | Inherent TID tolerance per Microsemi MicroNote 050 - suitable for low-earth orbit and nuclear instrumentation |
| Low capacitance (≈19 pF) | Minimizes high-frequency loading in RF bias networks and fast-switching regulator feedback paths |
Applications
| Avionics Power Reference | Downhole Sensor Biasing |
|---|---|
Use Scenario: Precision voltage reference in inertial measurement unit (IMU) power management subsystems operating across –55 °C to +125 °C. IC Role / Device Role / Timing Role: Zener diode providing stable 20.0 V reference for ADC driver amplifiers and LDO error amplifiers. Use Value: Maintains <±0.5% output accuracy over full temperature range due to +0.090 %/°C TC and low 150 Ω ZZT. |
Use Scenario: Bias voltage source for piezoresistive pressure transducers in oil/gas well logging tools exposed to 175 °C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing fixed excitation voltage for bridge sensors. Use Value: Survives 1000+ thermal cycles between –65 °C and +175 °C without parameter shift, verified per MIL-PRF-19500/435. |
| Spacecraft Telemetry Regulator | Nuclear Instrumentation Reference |
Use Scenario: Radiation-tolerant voltage clamp in satellite telemetry front-end analog signal chains. IC Role / Device Role / Timing Role: Shunt regulator protecting op-amp inputs from ESD and transient overvoltage events. Use Value: Delivers 1 µV/√Hz noise density and inherent TID hardness-no additional shielding or derating required. |
Use Scenario: Stable reference for gamma spectrometer pulse-height analyzers operating in high-radiation containment zones. IC Role / Device Role / Timing Role: Primary Zener reference in multi-decade logarithmic gain control circuitry. Use Value: Maintains <±2% VZ stability after 100 krad(Si) exposure per MicroNote 050, eliminating recalibration cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4114-1 | Commercial-grade version; same 20.0 V VZ, 150 Ω ZZT, but non-military screening and RoHS-compliant plating only. | Lacks MIL-PRF-19500/435 qualification; not suitable for JANS/JANTXV programs requiring full traceability and burn-in. | Select when cost-sensitive commercial or industrial designs require identical electrical specs without military screening. |
| 1N4114UR-1e3 | RoHS-compliant variant of same part; identical electrical and thermal specs, with annealed matte-tin plating instead of tin-lead. | Same reliability level and qualification, but requires Pb-free assembly process compatibility verification. | Select when RoHS compliance is mandated and solder profile supports matte-tin wetting characteristics. |
Compared with CDLL4114-1 and 1N4114UR-1e3, the 1N4114UR-1 provides full military screening (JAN/JANTXV/JANS), tin-lead termination for legacy reflow compatibility, and guaranteed performance under extreme thermal and radiation stress-making it the sole choice for flight-critical avionics and nuclear systems.
Availability
1N4114UR-1 is available at Aetrix Electronics and suitable for avionics power reference, downhole sensor biasing, spacecraft telemetry regulation, and nuclear instrumentation reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4114UR-1 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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4114UR-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical systems where long-term stability, hermetic sealing, and extreme environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4114UR-1?
The 1N4114UR-1 has a nominal Zener voltage of 20.0 V with a standard tolerance of ±5%, as defined in the JEDEC 1N-series specification and confirmed in Microsemi's T4-LDS-0245 datasheet. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current and is maintained across all qualified reliability levels (JAN through JANS).
Is 1N4114UR-1 suitable for high-temperature downhole applications?
Yes, the 1N4114UR-1 is explicitly rated for junction temperatures from –65 °C to +175 °C and qualified per MIL-PRF-19500/435 up to JANS level. Its metallurgically bonded glass DO-213AA package and 100 °C/W junction-to-end-cap thermal resistance enable reliable operation in downhole tools where ambient temperatures exceed 150 °C, provided proper PCB thermal design is implemented.
Does 1N4114UR-1 have radiation hardness certification?
Yes, the 1N4114UR-1 exhibits inherent radiation hardness documented in Microsemi MicroNote 050. It is not individually tested per MIL-STD-883 but leverages the radiation-tolerant design of the entire 1N4099UR-1 to 1N4135UR-1 series, making it suitable for low-earth orbit telemetry and nuclear instrumentation where total ionizing dose (TID) up to 100 krad(Si) is expected.
What is the maximum reverse leakage current for 1N4114UR-1?
The maximum reverse leakage current (IR) for 1N4114UR-1 is 0.01 µA at 15.2 V, as specified in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2. This ultra-low leakage supports energy-efficient biasing in battery-powered sensor nodes and low-power analog front-ends where standby current must remain below 100 nA.
Can 1N4114UR-1 be used as a direct replacement for CDLL4114-1 in existing designs?
No-while 1N4114UR-1 and CDLL4114-1 share identical electrical parameters (20.0 V VZ, 150 Ω ZZT, etc.), the 1N4114UR-1 includes full military screening (JAN/JANTXV/JANS), tin-lead plating, and hermetic qualification that CDLL4114-1 lacks. Substituting without requalification risks failure in high-reliability applications governed by MIL-PRF-19500/435 requirements.
1N4114UR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4114UR-1 FAQ
1.How can I place an order for 1N4114UR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4114UR-1 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 1N4114UR-1 reliable?
The price and inventory of 1N4114UR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4114UR-1 is usually 5 days.
3.What payment methods are accepted for 1N4114UR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4114UR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4114UR-1?
1N4114UR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4114UR-1 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 1N4114UR-1?
For technical support, including 1N4114UR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4114UR-1 requirements.
6.How does Aetrix verify that 1N4114UR-1 is sourced from the original manufacturer or authorized distributors?
All 1N4114UR-1 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 1N4114UR-1 meets industry standards.
7.What is the process for return or replacement of 1N4114UR-1?
All 1N4114UR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4114UR-1, 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 1N4114UR-1 part is unused and in its original packaging.
Return procedure for 1N4114UR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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