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Microchip Technology 1N4693UR-1/TR
- Part No.:
- 1N4693UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4693UR-1/TR.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
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Product details
Overview
1N4693UR-1/TR from Microsemi is a 500 mW surface-mount Zener diode in DO-213AA (SOD80/MLL34) MELF package, rated for 7.5 V nominal Zener voltage at 50 µA test current, ±5% tolerance, with 0.75 V regulation change between 10 µA and 100 µA. It operates across –65 °C to +175 °C and is used for precision low-current voltage reference and regulation in space-constrained analog circuits.
For engineers reviewing the 1N4693UR-1/TR datasheet, 1N4693UR-1/TR pinout, 1N4693UR-1/TR application, or 1N4693UR-1/TR equivalent, key selection factors include its ultra-low 50 µA Zener test current, hermetically sealed glass construction, MIL-PRF-19500 up-screening capability, minimal capacitance (<1.5 pF), and radiation-hardened design per MicroNote 050.
Technical Context
This Zener diode functions as a two-terminal voltage reference device operating in reverse breakdown, where stable regulation is achieved at low bias currents. Its metallurgically bonded silicon die and hermetic glass encapsulation ensure high reliability under thermal cycling and radiation exposure.
The DO-213AA package enables surface-mount assembly while maintaining thermal resistance of 100 °C/W junction-to-end-cap and 250 °C/W junction-to-ambient on FR4. Polarity is marked by a cathode band, and operation requires the banded end to be positive relative to the anode for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at 50 µA - defines precise regulation point for low-power biasing and reference generation |
| Zener Test Current | 50 µA - enables stable regulation in micro-power circuits without burdening source impedance |
| Voltage Regulation (∆VZ) | 0.75 V (10 µA to 100 µA) - quantifies knee-region stability for low-current applications |
| Max Reverse Leakage @ VR | 10.0 µA at 5.7 V - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation | 0.5 W - supports continuous operation up to 63.6 mA Zener current at TEC ≤ 125 °C |
| Junction Temperature Range | –65 °C to +175 °C - qualifies for extended industrial, aerospace, and downhole environments |
| Package Type | DO-213AA (SOD80/MLL34) - MELF-style hermetic glass surface-mount package with end-cap terminations |
Pinout & Package
DO-213AA (SOD80/MLL34) is a cylindrical MELF-style hermetically sealed glass package with two metallized end caps serving as anode and cathode terminals. Cathode is marked by a visible band; polarity must be observed during PCB layout and assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher potential during Zener operation; defines reference voltage polarity |
| Anode (unbanded end) | Reference return node | Connected to circuit ground or lower potential; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| Metallurgical die bonding | Enhances thermal transfer and mechanical robustness versus epoxy-bonded alternatives |
| Ultra-low 50 µA Zener test current | Enables use in nano-power systems where supply current is strictly constrained |
| MIL-PRF-19500 up-screening option | Supports qualification for military/aerospace programs requiring reliability screening |
| Radiation hardness (per MicroNote 050) | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
Applications
| High-Voltage Sensor Biasing | Low-Power Reference Generator |
|---|---|
Use Scenario: Providing stable bias voltage to photodiode amplifiers in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed reverse-bias potential across sensing element. Use Value: Enables sub-100 µA system standby current while maintaining 7.5 V ±0.375 V accuracy over –40 °C to +85 °C. |
Use Scenario: Generating precision reference for ADC input scaling in portable medical instrumentation. IC Role / Device Role / Timing Role: Two-terminal passive reference source replacing active voltage references to reduce quiescent power. Use Value: Delivers 7.5 V reference with <1.5 pF capacitance, minimizing sampling error and settling time in 16-bit SAR ADC front-ends. |
| Aerospace Power Monitor Calibration | Radiation-Hardened Telemetry Interface |
Use Scenario: Calibrating voltage dividers in satellite power distribution units exposed to thermal vacuum cycles. IC Role / Device Role / Timing Role: Stable Zener reference for trimming analog monitoring circuits during factory calibration. Use Value: Maintains ±5% voltage tolerance after 1000 thermal cycles (–65 °C to +175 °C) due to hermetic glass packaging and metallurgical bond. |
Use Scenario: Regulating supply rails for RS-422 transceivers in nuclear reactor control systems. IC Role / Device Role / Timing Role: Radiation-tolerant voltage clamp protecting interface ICs from transient overvoltage events. Use Value: Sustains regulation integrity after 100 krad(Si) TID exposure per MicroNote 050, preventing data corruption in critical telemetry links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C7V5 (Vishay) | 500 mW DO-35 package; 7.5 V ±5%; 5 mA test current; higher leakage (50 µA @ 6 V) | Less suitable for ultra-low-current biasing; not radiation-hardened or MIL-screenable | Lower-cost alternative where radiation tolerance and micro-power operation are not required |
| MMBZ5227BS (ON Semiconductor) | SOT-23 package; 7.5 V ±5%; 20 mA test current; 350 mW rating; RoHS-compliant only | Higher power dissipation but larger temperature coefficient; no MIL-PRF-19500 screening path | Preferred for high-volume consumer designs needing SMT compatibility and Pb-free compliance |
Compared with BZX55C7V5 and MMBZ5227BS, the 1N4693UR-1/TR offers uniquely low 50 µA test current, hermetic reliability, and radiation hardness-making it irreplaceable in aerospace, downhole, and mission-critical analog reference roles where parameter stability under stress is non-negotiable.
Availability
1N4693UR-1/TR is available at Aetrix Electronics and suitable for high-reliability voltage reference, radiation-tolerant sensor biasing, and aerospace power monitoring applications requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N4693UR-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 1N4693UR-1/TR belongs to Microsemi's legacy DO-213AA Zener series designed specifically for applications demanding hermetic sealing, extreme temperature resilience, and proven radiation tolerance in mission-critical systems.
FAQ
What is the Zener voltage tolerance for 1N4693UR-1/TR?
The 1N4693UR-1/TR has a nominal Zener voltage of 7.5 V with a standard tolerance of ±5%, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0240-1 Rev. 2. Tighter tolerances (±2% and ±1%) are available via different suffixes (C and D), but the "UR-1" base part defaults to ±5%.
Is 1N4693UR-1/TR compatible with lead-free reflow processes?
Yes - the 1N4693UR-1/TR supports lead-free soldering with a maximum solder temperature of 260 °C for 10 seconds, per MIL-STD-750 Method 2026. Its end caps are available with matte-tin plating (RoHS-compliant e3 version), making it suitable for standard Pb-free reflow profiles.
Does 1N4693UR-1/TR require external current limiting?
Yes - like all Zener diodes, the 1N4693UR-1/TR must be used with a series current-limiting resistor to prevent exceeding its 0.5 W power rating. At 7.5 V, maximum continuous Zener current is 63.6 mA; typical designs use 1–10 mA for optimal regulation stability and thermal margin.
Can 1N4693UR-1/TR be used in radiation-intensive environments?
Yes - the 1N4693UR-1/TR is inherently radiation-hardened per Microsemi's MicroNote 050, validated for total ionizing dose (TID) up to 100 krad(Si). This makes it suitable for satellite, nuclear, and high-altitude avionics applications where parameter shift under irradiation must be minimized.
What does the "TR" suffix indicate in 1N4693UR-1/TR?
The "TR" suffix denotes tape-and-reel packaging per EIA-481-1-B standard, enabling automated SMT placement. The base part 1N4693UR-1 is identical electrically and mechanically; "TR" specifies the delivery format only - no parameter or reliability differences are implied.
1N4693UR-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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.7 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
1N4693UR-1/TR FAQ
1.How can I place an order for 1N4693UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4693UR-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 1N4693UR-1/TR reliable?
The price and inventory of 1N4693UR-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 1N4693UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4693UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4693UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4693UR-1/TR?
1N4693UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4693UR-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 1N4693UR-1/TR?
For technical support, including 1N4693UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4693UR-1/TR requirements.
6.How does Aetrix verify that 1N4693UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4693UR-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 1N4693UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4693UR-1/TR?
All 1N4693UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4693UR-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 1N4693UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4693UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4693UR-1/TR Tags
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MM5Z5V1ST1G
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