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Microchip Technology 1N4112DUR-1/TR
- Part No.:
- 1N4112DUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4112DUR-1/TR.pdf
- Description:
- DIODE ZENER 18V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:95
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Product details
Overview
1N4112DUR-1/TR from Microsemi is a 18 V, 1% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80) glass MELF package, qualified to JANTXV level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace power conditioning and precision reference circuits.
For engineers reviewing the 1N4112DUR-1/TR datasheet, 1N4112DUR-1/TR pinout, 1N4112DUR-1/TR application, or 1N4112DUR-1/TR equivalent, this part delivers low-noise (1 µV/√Hz), hermetically sealed regulation with 100 °C/W junction-to-end-cap thermal resistance and minimal capacitance for stable performance across -65 °C to +175 °C.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 18.0 V at 250 mA test current, dynamic impedance of 100 Ω, and temperature coefficient of +0.090 %/°C. It maintains regulation over wide current ranges while exhibiting low noise density and negligible ESD sensitivity per MIL-STD-750 Method 1020.
The metallurgically bonded glass construction ensures hermetic sealing and inherent radiation hardness per Microsemi MicroNote 050. Its DO-213AA package supports automated SMT placement and provides thermal performance validated on FR4 with 1 oz Cu, derating linearly from 500 mW at 25 °C to zero at 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.0 V ±1% at 250 mA - precise regulation point for reference and clamp circuits |
| Power Dissipation | 500 mW - supports continuous operation up to 125 °C case temperature before linear derating |
| Zener Impedance (ZZT) | 100 Ω - ensures stable output under varying load currents |
| Noise Density | 1 µV/√Hz - enables use in low-noise analog references and precision instrumentation |
| Reverse Leakage (IR) | 0.05 µA at 13.7 V - minimal standby current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.090 %/°C - predictable drift behavior for temperature-compensated designs |
| Junction Temp. Range | -65 °C to +175 °C - suitable for extended-environment military and space applications |
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 band; weight ≈ 0.04 g; solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection in reverse-bias configuration | Must be held positive relative to anode to enable breakdown regulation; polarity critical for correct operation |
| Anode (unbanded end) | Zener cathode connection in reverse-bias configuration | Reference ground or return node; forms regulated output at cathode when biased correctly |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level screening confirmed - meets stringent reliability requirements for flight-critical systems |
| Metallurgical bond construction | Eliminates interfacial delamination risk - ensures long-term stability under thermal cycling and vibration |
| Low noise density | 1 µV/√Hz at 18 V - enables direct use in high-resolution ADC references without external filtering |
| Hermetic glass packaging | DO-213AA seal integrity prevents moisture ingress - supports 20+ year field life in harsh environments |
| ESD insensitivity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for handling precautions during assembly |
Applications
| Aerospace Power Conditioning | Precision Instrumentation Reference |
|---|---|
Use Scenario: Regulating auxiliary rail voltages in satellite power distribution units exposed to wide thermal swings and radiation. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 18 V bias for DC-DC controller feedback networks. Use Value: Maintains ±0.18 V regulation over -55 °C to +125 °C due to +0.090 %/°C TC and hermetic stability. | Use Scenario: Generating ultra-stable reference for 24-bit precision data acquisition front-ends in laboratory analyzers. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying excitation to precision resistive sensor bridges. Use Value: Delivers 1 µV/√Hz noise floor enabling sub-10 ppm measurement resolution without additional filtering. |
| Avionics Sensor Signal Conditioning | Radiation-Hardened Industrial Control |
Use Scenario: Biasing and clamping signal paths in engine monitoring modules operating in jet turbine environments. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization for analog sensor interface ICs. Use Value: Withstands 100 krad(Si) TID per MicroNote 050 - maintains regulation integrity after cumulative radiation exposure. | Use Scenario: Providing fail-safe voltage supervision in nuclear plant control logic where component longevity is mission-critical. IC Role / Device Role / Timing Role: Standby-mode voltage monitor ensuring system reset thresholds remain within spec over decades. Use Value: 0.05 µA leakage at 13.7 V minimizes quiescent current drain in battery-backed safety circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4112-1 | Commercial-grade, non-military screened version; same 18 V ±1%, DO-213AA package, RoHS-compliant plating option | Lacks JANTXV qualification; not approved for flight hardware or Class H applications | Select CDLL4112-1 for cost-sensitive industrial designs where MIL-spec screening is unnecessary |
| 1N4112UR-1 | Same 18 V ±1% Zener, identical DO-213AA package, but with 5% tolerance (no "D" suffix) and no RoHS compliance marking | Higher voltage uncertainty limits use in precision references; non-RoHS plating restricts use in EU-compliant assemblies | Choose 1N4112UR-1 only when legacy compatibility or non-RoHS requirements override precision and environmental needs |
Compared with CDLL4112-1 and 1N4112UR-1, the 1N4112DUR-1/TR uniquely combines 1% tolerance, JANTXV screening, RoHS compliance (e3), and tape-and-reel packaging - making it the sole choice for new high-reliability designs requiring all three attributes simultaneously.
Availability
1N4112DUR-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, precision instrumentation reference, and radiation-hardened industrial control requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 1N4112DUR-1/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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.
The 1N4112DUR-1/TR belongs to Microsemi's MIL-qualified Zener diode family designed specifically for voltage regulation in mission-critical systems where long-term stability, radiation tolerance, and extreme environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4112DUR-1/TR?
The 1N4112DUR-1/TR has a Zener voltage tolerance of ±1%, indicated by the "D" in its part number per Microsemi's nomenclature. This is confirmed in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2, where 1N4112UR-1 variants with "D" suffix are specified at 18.0 V ±1% at 250 mA test current.
Is the 1N4112DUR-1/TR RoHS compliant?
Yes, the 1N4112DUR-1/TR is RoHS compliant, as indicated by the "e3" suffix in its full designation (1N4112DUR-1/TR e3). The datasheet states RoHS-compliant versions are available for commercial-grade devices, and the "TR" suffix confirms tape-and-reel packaging compatible with modern SMT lines.
What does the "TR" suffix mean in 1N4112DUR-1/TR?
The "TR" suffix in 1N4112DUR-1/TR denotes tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape. This format enables automated pick-and-place assembly and is explicitly called out in the Mechanical and Packaging section of the datasheet as a factory option.
What is the maximum Zener current (IZM) for the 1N4112DUR-1/TR?
The maximum Zener current IZM for the 1N4112DUR-1/TR is 40 mA, as listed in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2. This value corresponds to the 18.0 V row and reflects the peak DC current sustainable within the 500 mW power limit at thermal equilibrium.
How is the 1N4112DUR-1/TR qualified for high-reliability applications?
The 1N4112DUR-1/TR is qualified per MIL-PRF-19500/435 at JANTXV level, meaning it undergoes rigorous screening including burn-in, temperature cycling, and parametric testing to ensure performance in demanding aerospace and defense environments - fully documented in the datasheet's Qualification Levels section.
1N4112DUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4112DUR-1/TR FAQ
1.How can I place an order for 1N4112DUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4112DUR-1/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 1N4112DUR-1/TR reliable?
The price and inventory of 1N4112DUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4112DUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4112DUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4112DUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4112DUR-1/TR?
1N4112DUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4112DUR-1/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 1N4112DUR-1/TR?
For technical support, including 1N4112DUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4112DUR-1/TR requirements.
6.How does Aetrix verify that 1N4112DUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4112DUR-1/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 1N4112DUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4112DUR-1/TR?
All 1N4112DUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4112DUR-1/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 1N4112DUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4112DUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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