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Microchip Technology 1N4763AUR/TR
- Part No.:
- 1N4763AUR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N4763AUR/TR.pdf
- Description:
- DIODE ZENER 91V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,635
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Product details
Overview
1N4763AUR/TR from Microsemi is a surface-mount 1.0 W glass-encapsulated Zener diode with a nominal Zener voltage of 91 V, ±5% tolerance, 250 Ω maximum dynamic impedance at 2.8 mA test current, and 10 μA maximum reverse leakage at 69.2 V. It operates from –65 °C to +175 °C and is used for precision voltage regulation in high-reliability power supply feedback loops.
For engineers reviewing the 1N4763AUR/TR datasheet, 1N4763AUR/TR pinout, 1N4763AUR/TR application, or 1N4763AUR/TR equivalent, key selection criteria include its DO-213AB MELF glass package, hermetic sealing, radiation hardness per MicroNote 050, and tight thermal resistance (130 °C/W on FR4), making it suitable for aerospace, industrial control, and medical power systems where stability under thermal stress is critical.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown. Its Zener voltage is specified at 91 V with 2.8 mA test current (IZT), and it maintains regulation across a wide current range (0.25 mA to 3000 mA surge) while exhibiting low dynamic impedance (250 Ω max) and stable knee characteristics verified per Note 2.
The DO-213AB glass MELF package provides hermetic sealing, ESD insensitivity, and inherent radiation hardness. Thermal performance is defined relative to end-cap temperature (TEC) and ambient (TA), with 1.0 W steady-state dissipation rated at TEC < 125 °C or TA < 45 °C on FR4 with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 2.8 mA - defines precise regulation point for feedback networks |
| Power Dissipation | 1.0 W at TC = 25 °C - supports compact board layout without forced cooling in most applications |
| Dynamic Impedance (ZZT) | 250 Ω max at IZT = 2.8 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 10 μA max at VR = 69.2 V - guarantees low quiescent current in standby or low-power modes |
| Operating Temperature | –65 °C to +175 °C - enables deployment in extreme environments including downhole, avionics, and engine control |
| Thermal Resistance | 130 °C/W junction-to-ambient on FR4 (1 oz Cu) - informs heatsinking requirements for sustained 1 W operation |
| Surge Current (IS) | 3000 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
Pinout & Package
Package: DO-213AB glass MELF (hermetically sealed, leadless, cylindrical). Cathode indicated by single band; device operated with banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or low-side reference node in shunt regulator topology |
| Cathode | Zener regulation terminal / voltage reference output | Connected to regulated rail; voltage clamped to 91 V ±5% when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift; qualified for high-reliability SCD-driven programs |
| Radiation hardness (per MicroNote 050) | Enables use in space-grade and nuclear instrumentation without derating or shielding overhead |
| Low ESD sensitivity | Reduces handling risk during SMT assembly; no special grounding protocols required on production floor |
| Specified capacitance (Figure 2) | Supports high-frequency noise filtering in feedback paths without requiring external compensation |
| RoHS-compliant option (e3 suffix) | Meets global environmental compliance mandates without sacrificing electrical or thermal performance |
Applications
| Industrial Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters for PLCs and motor drives. IC Role / Device Role / Timing Role: Shunt voltage reference in optocoupler-coupled feedback loop. Use Value: Maintains ±1% output accuracy over –40 °C to +85 °C ambient due to low tempco and stable ZZT. |
Use Scenario: Providing stable bias voltage for radiation-tolerant op-amps in satellite telemetry circuits. IC Role / Device Role / Timing Role: Precision Zener reference replacing bulkier hybrid modules. Use Value: Delivers 91 V reference with no parameter shift after 100 krad(Si) exposure per MicroNote 050. |
| Medical Imaging HV Bias | Downhole Sensor Conditioning |
Use Scenario: Generating stable bias for photomultiplier tube (PMT) anode chains in PET scanners. IC Role / Device Role / Timing Role: Cascaded Zener string element for multi-stage HV distribution. Use Value: Hermetic seal prevents arcing or leakage in high-humidity, high-voltage enclosures. |
Use Scenario: Voltage clamping in sensor front-ends exposed to >150 °C wellbore temperatures. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization in analog signal conditioning. Use Value: Operates continuously at 175 °C junction temperature with no parametric shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4763A | Same Zener voltage and tolerance, but DO-41 axial-leaded package (not surface mount) | Requires through-hole assembly; unsuitable for high-density PCBs or automated SMT lines | Select 1N4763AUR/TR when board space, thermal cycling reliability, or automated placement are mandatory |
| SMAJ4763A | Same electrical specs, but SMA package (plastic, not glass); higher capacitance and lower surge rating (2000 mA) | Limited to commercial-grade applications; not radiation-hard or hermetically sealed | Choose SMAJ4763A only for cost-sensitive, non-critical consumer designs where RoHS and SMT compatibility suffice |
Compared with 1N4763A and SMAJ4763A, the 1N4763AUR/TR uniquely combines surface-mount compatibility, hermetic glass construction, radiation hardness, and 3000 mA surge capability-making it the sole choice for mission-critical, high-temperature, or radiation-exposed Zener regulation.
Availability
1N4763AUR/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage references, medical imaging bias circuits, and downhole sensor conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4763AUR/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N4763AUR/TR belongs to Microsemi's surface-mount Zener diode family designed specifically for high-density, high-stability voltage regulation in harsh-environment applications where hermeticity, thermal resilience, and radiation tolerance are non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N4763AUR/TR?
The 1N4763AUR/TR has a nominal Zener voltage of 91 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number. This tolerance is guaranteed at 2.8 mA test current and 30 °C case temperature. Tighter tolerances (±2% or ±1%) are available with "C" or "D" suffixes, but those are distinct orderable variants-not applicable to the 1N4763AUR/TR itself.
Is 1N4763AUR/TR RoHS compliant?
Yes, the "e3" suffix in the full designation (1N4763AUR/TR,e3) confirms RoHS compliance per EU Directive 2011/65/EU. The device uses annealed matte-tin plating and meets JEDEC J-STD-020 moisture sensitivity level 1. Standard non-e3 versions use tin-lead terminations and are not RoHS compliant.
What is the maximum surge current rating for 1N4763AUR/TR?
The 1N4763AUR/TR is rated for a maximum reverse surge current (IS) of 3000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating applies only to short-duration transients and does not imply continuous operation at that current level.
How is polarity marked on the 1N4763AUR/TR package?
The 1N4763AUR/TR uses a single cathode band on the glass MELF body to indicate polarity. For Zener regulation, the banded end must be connected to the more positive potential (i.e., the cathode is the regulated output node), while the unmarked end is the anode and connects to ground or the return path.
What thermal resistance value applies to 1N4763AUR/TR on a standard FR4 PCB?
When mounted on a standard FR4 printed circuit board with 1 oz copper and the recommended pad layout, the 1N4763AUR/TR exhibits a junction-to-ambient thermal resistance of 130 °C/W. This value assumes natural convection and is used to calculate maximum allowable power dissipation at elevated ambient temperatures.
1N4763AUR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 250 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 69.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N4763AUR/TR FAQ
1.How can I place an order for 1N4763AUR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4763AUR/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 1N4763AUR/TR reliable?
The price and inventory of 1N4763AUR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4763AUR/TR is usually 5 days.
3.What payment methods are accepted for 1N4763AUR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4763AUR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4763AUR/TR?
1N4763AUR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4763AUR/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 1N4763AUR/TR?
For technical support, including 1N4763AUR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4763AUR/TR requirements.
6.How does Aetrix verify that 1N4763AUR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4763AUR/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 1N4763AUR/TR meets industry standards.
7.What is the process for return or replacement of 1N4763AUR/TR?
All 1N4763AUR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4763AUR/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 1N4763AUR/TR part is unused and in its original packaging.
Return procedure for 1N4763AUR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4763AUR/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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