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Microchip Technology 1N4706UR-1/TR
- Part No.:
- 1N4706UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4706UR-1/TR.pdf
- Description:
- DIODE ZENER 19V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,901
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Product details
Overview
1N4706UR-1/TR from Microsemi is a 19.0 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD80/MLL34) MELF package, tested at 50 µA Zener current, with 0.19 V regulation change between 10 µA and 100 µA, used for precision voltage reference and low-power regulation in space-constrained industrial power supplies and sensor signal conditioning circuits.
For engineers reviewing the 1N4706UR-1/TR datasheet, 1N4706UR-1/TR pinout, 1N4706UR-1/TR application, or 1N4706UR-1/TR equivalent, key selection factors include its 19.0 V nominal Zener voltage, 14.4 mA maximum Zener current, hermetically sealed glass construction, minimal 1.0 µA reverse leakage at 15.2 V, and RoHS-compliant matte-tin plating option.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across a wide current range (50 µA to 14.4 mA), with low dynamic impedance reflected by its 0.19 V ∆VZ specification. Its metallurgically bonded silicon die and hermetic glass package ensure high reliability and radiation hardness per MicroNote 050.
Designed for commercial-grade applications requiring stable reference voltages under thermal stress, it supports operation from –65 °C to +175 °C junction temperature, with thermal resistance of 100 °C/W junction-to-end cap and 250 °C/W junction-to-ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 19.0 V - precise regulation point at 50 µA test current |
| Zener Tolerance | ±5% - ensures voltage stability within 18.05–19.95 V at 25 °C |
| Power Dissipation | 0.5 W - supports continuous operation up to 14.4 mA at 19 V without derating below 50 °C ambient |
| Reverse Leakage Current | ≤1.0 µA at 15.2 V - minimizes parasitic current draw in high-impedance bias networks |
| Regulation Change (∆VZ) | 0.19 V - small voltage shift between 10 µA and 100 µA, indicating low dynamic impedance |
| Junction Temperature Range | –65 °C to +175 °C - enables deployment in extended-temperature industrial and aerospace-adjacent environments |
| Package | DO-213AA (SOD80/MLL34) - cylindrical MELF glass package with end-cap terminals, optimized for automated placement and thermal transfer |
Pinout & Package
DO-213AA (SOD80/MLL34) is a hermetically sealed glass MELF package with two metallized end caps serving as anode and cathode terminals. Cathode is marked by a visible band; device operates with banded end positive during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential node; defines polarity for reverse-bias operation and voltage reference output |
| Anode (unbanded end) | Reference return terminal | Connected to circuit ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift, supporting >20-year field reliability in sealed enclosures |
| Metallurgical die bonding | Enables robust thermal transfer from silicon to end caps, sustaining 100 °C/W junction-to-end cap thermal resistance |
| Low 50 µA Zener test current | Allows stable regulation in ultra-low-power circuits such as battery-backed sensors and energy-harvesting systems |
| Radiation-hardened design | Meets inherent radiation tolerance per Microsemi MicroNote 050, suitable for low-dose space-qualified subsystems |
| RoHS-compliant matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles up to 260 °C |
Applications
| Industrial Power Monitoring | Medical Sensor Biasing |
|---|---|
Use Scenario: Voltage reference for analog front-end comparators monitoring 24 V DC bus integrity in PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing stable 19.0 V reference against which bus voltage is compared. Use Value: ±5% tolerance and <1.0 µA leakage ensure comparator trip thresholds remain accurate over temperature and time without calibration drift. | Use Scenario: Biasing network for low-noise op-amp stages in portable ECG amplifiers. IC Role / Device Role / Timing Role: Precision shunt reference establishing fixed common-mode voltage for differential input stages. Use Value: Low 50 µA test current and minimal capacitance enable stable DC bias without loading high-impedance electrode inputs. |
| Aerospace Subsystem Reference | Test Equipment Calibration |
Use Scenario: On-board voltage reference for ADC reference buffers in satellite telemetry interface cards. IC Role / Device Role / Timing Role: Radiation-tolerant Zener regulating local 19 V supply for precision ADC reference drivers. Use Value: Inherent radiation hardness and –65 °C to +175 °C operation support unshielded deployment in LEO mission electronics. | Use Scenario: Fixed reference element in handheld multimeter auto-ranging circuits. IC Role / Device Role / Timing Role: Shunt regulator defining threshold voltages for range-switching comparators. Use Value: Stable ∆VZ (0.19 V) and tight thermal resistance allow consistent switching points across 0–50 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4706A-TR | Same 19.0 V nominal voltage and DO-213AA package, but non-hermetic plastic SOD-123 package; higher 250 °C/W RθJA | Limited to commercial-grade, non-radiation-sensitive applications; unsuitable for high-reliability or extended-temperature use | Select 1N4706UR-1/TR when hermetic sealing, radiation tolerance, or operation beyond 125 °C is required |
| BZX55C18-TR | 18 V nominal voltage (5.6% lower), ±5% tolerance, DO-35 glass package; 100 µA IZT; 500 mW rating | Requires circuit recalibration for 18 V vs. 19 V reference; larger DO-35 footprint incompatible with MELF land patterns | Choose BZX55C18-TR only if 18 V suffices and board layout allows axial-style mounting |
Compared with 1N4706A-TR and BZX55C18-TR, the 1N4706UR-1/TR delivers superior thermal performance (100 °C/W RθJL), guaranteed hermeticity, and radiation tolerance-making it the sole choice for high-stability, high-reliability, or extended-temperature Zener reference applications where parameter drift must be minimized.
Availability
1N4706UR-1/TR is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor biasing, aerospace subsystem reference, and test equipment calibration requiring stable component supply and long-term parametric consistency.
Supply support for 1N4706UR-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, radiation-tolerant, and high-performance analog and mixed-signal components.
The 1N4706UR-1/TR belongs to Microsemi's legacy DO-213AA Zener family, engineered for applications demanding hermetic sealing, extended temperature operation, and intrinsic radiation hardness-particularly in defense, aerospace, and critical industrial systems.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4706UR-1/TR?
The 1N4706UR-1/TR has a nominal Zener voltage of 19.0 V with a standard tolerance of ±5%, meaning its actual regulation voltage falls between 18.05 V and 19.95 V at 25 °C and 50 µA test current. Tighter 2% and 1% tolerance variants exist under different suffixes, but the 1N4706UR-1/TR specifically uses the ±5% grade.
What package type does the 1N4706UR-1/TR use, and how is polarity identified?
The 1N4706UR-1/TR uses the DO-213AA (also known as SOD80 or MLL34) hermetically sealed glass MELF package. Polarity is indicated by a visible cathode band on one end; during Zener operation, the banded end must be held at a higher potential than the unbanded (anode) end.
What is the maximum Zener current (IZM) and how is it derived for the 1N4706UR-1/TR?
The maximum Zener current (IZM) for the 1N4706UR-1/TR is 14.4 mA. This value is calculated from its 500 mW power rating and 19.0 V nominal Zener voltage (IZM = PD / VZ ≈ 500 mW / 19.0 V), and is confirmed in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0240-1 Rev. 2.
Is the 1N4706UR-1/TR suitable for RoHS-compliant manufacturing?
Yes-the 1N4706UR-1/TR is available in a RoHS-compliant version with matte-tin plating on its end caps, designated by the "e3" suffix in full nomenclature (e.g., 1N4706UR-1/TR e3). This variant meets MIL-STD-750 solderability requirements and supports lead-free reflow up to 260 °C for 10 seconds.
How does the 1N4706UR-1/TR perform under elevated temperature conditions?
The 1N4706UR-1/TR is rated for junction temperatures from –65 °C to +175 °C. Its power dissipation must be derated above 50 °C ambient (or 125 °C end-cap temperature) per the curve in Figure 1 of the datasheet. At 100 °C ambient, its usable power drops to ~300 mW, maintaining safe operation with appropriate PCB copper area and thermal relief.
1N4706UR-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):
- 19 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4706UR-1/TR FAQ
1.How can I place an order for 1N4706UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4706UR-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 1N4706UR-1/TR reliable?
The price and inventory of 1N4706UR-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 1N4706UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4706UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4706UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4706UR-1/TR?
1N4706UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4706UR-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 1N4706UR-1/TR?
For technical support, including 1N4706UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4706UR-1/TR requirements.
6.How does Aetrix verify that 1N4706UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4706UR-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 1N4706UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4706UR-1/TR?
All 1N4706UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4706UR-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 1N4706UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4706UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4706UR-1/TR Tags
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