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Microchip Technology 1N4695UR-1/TR
- Part No.:
- 1N4695UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4695UR-1/TR.pdf
- Description:
- DIODE ZENER 8.7V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,262
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Product details
Overview
1N4695UR-1/TR from Microsemi is a 500 mW surface-mount Zener diode in DO-213AA (SOD80/MLL34) MELF package, rated for 8.7 V nominal Zener voltage at 50 µA test current, ±5% tolerance, with 0.10 V regulation change between 10 µA and 100 µA, used for precision low-current voltage reference and regulation in space-constrained analog circuits.
For engineers reviewing the 1N4695UR-1/TR datasheet, 1N4695UR-1/TR pinout, 1N4695UR-1/TR application, or 1N4695UR-1/TR equivalent, key selection criteria include its ultra-low 50 µA Zener test current, hermetically sealed glass construction, MIL-PRF-19500 up-screening capability, minimal capacitance (<1.0 pF), and radiation-hardened design per MicroNote 050.
Technical Context
The 1N4695UR-1/TR operates as a reverse-biased silicon Zener regulator with metallurgically bonded die and metal end caps, enabling high reliability and thermal stability. Its 8.7 V nominal breakdown voltage is specified at IZT = 50 µA, with ∆VZ = 0.10 V across 10–100 µA, and maximum reverse leakage IR = 1.0 µA at VR = 6.6 V.
Designed for low-power, low-current regulation, it delivers stable reference performance over –65 °C to +175 °C junction temperature, with RθJA = 250 °C/W on FR4 board and RθJL = 100 °C/W to end cap, supporting operation at ambient temperatures below 50 °C or end-cap temperatures below 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 8.7 V at 50 µA - sets precise regulation point for low-current bias/reference circuits |
| Zener Test Current (IZT) | 50 µA - enables stable regulation in ultra-low-power applications where higher currents are unavailable |
| Voltage Regulation (∆VZ) | 0.10 V (10–100 µA) - indicates tight knee region for consistent reference accuracy across operating range |
| Max Reverse Leakage (IR) | 1.0 µA at 6.6 V - ensures minimal error contribution in high-impedance sensing or reference paths |
| Power Dissipation (PD) | 0.5 W - supports continuous operation up to 57.5 mA max Zener current (IZM = 54.8 mA) |
| Junction Temperature Range | –65 °C to +175 °C - qualified for extended industrial, aerospace, and harsh-environment use |
| Package Type | DO-213AA (SOD80/MLL34) MELF - hermetically sealed glass surface-mount package with metallurgical die bonding |
Pinout & Package
DO-213AA (SOD80/MLL34) MELF package: hermetically sealed glass cylindrical body with metallized end caps; cathode indicated by single band; polarity: banded end is cathode (positive during Zener operation); RoHS-compliant matte-tin plating available (commercial grade only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential node when regulating; carries full Zener current in reverse bias |
| Cathode (banded end) | Zener regulation output / voltage reference node | Provides stable 8.7 V relative to anode; must be held at higher potential than anode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded die | Eliminates wire bonds and interfacial delamination risk, improving long-term reliability under thermal cycling |
| Hermetic glass sealing | Prevents moisture ingress and contamination, enabling operation in high-humidity or vacuum environments |
| Ultra-low 50 µA Zener test current | Allows integration into micro-power systems (e.g., battery-backed sensors) without loading bias networks |
| Radiation hardness per MicroNote 050 | Validated performance in total ionizing dose (TID) environments typical of space and nuclear applications |
| MIL-PRF-19500 up-screening option | Supports qualification to military screening levels (JANTX/JANTXV/JANS) for mission-critical programs |
Applications
| Low-Power Sensor Biasing | Spacecraft Power Monitoring |
|---|---|
Use Scenario: Providing stable 8.7 V reference for op-amp input biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end signal conditioning. Use Value: Ultra-low 50 µA test current minimizes quiescent drain on coin-cell batteries while maintaining ±5% regulation accuracy. | Use Scenario: Regulating reference voltage for ADC monitoring of solar array bus voltage in LEO satellites. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference in power system health monitoring circuitry. Use Value: Hermetic DO-213AA package and MicroNote 050 radiation qualification ensure stable operation under cumulative TID exposure. |
| Industrial PLC Analog Input Protection | Medical Instrument Calibration Reference |
Use Scenario: Clamping and regulating input stage voltage in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) Zener clamp protecting downstream instrumentation amplifiers. Use Value: Minimal reverse leakage prevents signal offset errors; DO-213AA thermal resistance supports reliable derating at elevated cabinet temperatures. | Use Scenario: Serving as factory-trimmed reference in portable ECG amplifier calibration circuitry. IC Role / Device Role / Timing Role: Stable, low-drift voltage reference for gain-setting DAC feedback networks. Use Value: Tight 0.10 V regulation delta across 10–100 µA ensures repeatable calibration points despite supply variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C8V2 (ON Semiconductor) | 8.2 V nominal, ±5%, 500 mW, DO-35 package, 5 mA test current | Higher IZT increases minimum bias requirement; axial DO-35 limits board density vs. MELF | Choose for cost-sensitive industrial designs where 0.5 V lower voltage and axial footprint are acceptable |
| MMBZ5233BS (Diodes Inc.) | 8.2 V nominal, ±5%, 300 mW, SOT-23 package, 20 mA test current | Lower power rating and higher IZT reduce suitability for ultra-low-power or high-temp operation | Choose for high-volume consumer PCBs needing SMT compatibility but not radiation hardness or hermeticity |
Compared with BZX55C8V2 and MMBZ5233BS, the 1N4695UR-1/TR offers uniquely low 50 µA test current, hermetic DO-213AA packaging, and radiation tolerance-making it irreplaceable in micro-power, high-reliability, or space-grade applications where those attributes are mandatory.
Availability
1N4695UR-1/TR is available at Aetrix Electronics and suitable for low-power sensor biasing, spacecraft power monitoring, and industrial PLC analog input protection requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N4695UR-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-hardened, and aerospace-grade components.
The 1N4695UR-1/TR belongs to Microsemi's legacy DO-213AA Zener series designed specifically for mission-critical analog reference and regulation in extreme environments-including space, defense, and nuclear instrumentation.
FAQ
What is the Zener voltage tolerance for 1N4695UR-1/TR?
The 1N4695UR-1/TR has a standard Zener voltage tolerance of ±5% at 8.7 V nominal. Tighter tolerances (±2% and ±1%) are available under different part number suffixes (e.g., "C" or "D"), but the "UR-1" base designation specifies ±5%. This tolerance is measured at 50 µA test current and 25 °C ambient.
Is 1N4695UR-1/TR RoHS compliant?
Yes, the 1N4695UR-1/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N4695UR-1/TR e3). RoHS compliance applies only to commercial-grade versions; up-screened military versions (e.g., JANTXV) retain tin-lead plating. The device meets EU Directive 2011/65/EU requirements for lead-free terminations.
What does the "TR" suffix mean in 1N4695UR-1/TR?
The "TR" suffix in 1N4695UR-1/TR indicates tape-and-reel packaging per EIA-481-1-B standard, intended for automated SMT placement. It does not affect electrical specifications. Standard reel quantities are 3,000 units per reel; custom quantities require factory consultation.
Can 1N4695UR-1/TR be used in radiation-intensive environments?
Yes, the 1N4695UR-1/TR is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) resilience. Its metallurgically bonded die and hermetic DO-213AA package contribute to robustness in space, nuclear, and high-altitude applications where displacement damage and charge trapping are concerns.
What is the maximum Zener current (IZM) for 1N4695UR-1/TR?
The maximum dc Zener current (IZM) for 1N4695UR-1/TR is 54.8 mA, derived from its 0.5 W power rating and 8.7 V nominal Zener voltage (IZM = PD/VZ). This value assumes operation within thermal limits: TEC < 125 °C or TA < 50 °C on FR4 board with recommended footprint.
1N4695UR-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):
- 8.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.6 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
1N4695UR-1/TR FAQ
1.How can I place an order for 1N4695UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4695UR-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 1N4695UR-1/TR reliable?
The price and inventory of 1N4695UR-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 1N4695UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4695UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4695UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4695UR-1/TR?
1N4695UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4695UR-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 1N4695UR-1/TR?
For technical support, including 1N4695UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4695UR-1/TR requirements.
6.How does Aetrix verify that 1N4695UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4695UR-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 1N4695UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4695UR-1/TR?
All 1N4695UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4695UR-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 1N4695UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4695UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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