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Microchip Technology 1N4764UR-1/TR
- Part No.:
- 1N4764UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N4764UR-1/TR.pdf
- Description:
- DIODE ZENER 100V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,301
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Product details
Overview
1N4764UR-1/TR from Microsemi is a surface-mount 1.0 W glass Zener diode with a nominal Zener voltage of 100 V, ±5% tolerance (A-suffix), 2.5 mA test current, 350 Ω dynamic impedance at IZT, and 9 mA maximum regulator current at TA = 50°C. It operates from –65°C to +175°C and is used for precision voltage regulation in high-reliability power supply feedback paths.
For engineers reviewing the 1N4764UR-1/TR datasheet, 1N4764UR-1/TR pinout, 1N4764UR-1/TR application, or 1N4764UR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (130°C/W on FR4), surge current rating (3000 mA), hermetic DO-213AB MELF package, and RoHS-compliant e3 plating.
Technical Context
This device implements a silicon planar Zener junction optimized for stable reverse-breakdown regulation across wide temperature and current ranges. Its glass-encapsulated DO-213AB MELF construction provides hermetic sealing, radiation hardness per MicroNote 050, and low parasitic capacitance - critical for noise-sensitive analog references and aerospace-grade power monitors.
It delivers 100 V regulation with sharp knee characteristics verified by dual-point Zener impedance measurement (IZK and IZT), and supports steady-state dissipation of 1.0 W below 125°C end-cap temperature or 45°C ambient on standard FR4 with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V ±5% - defines precise clamping level for overvoltage protection and reference circuits |
| Test Current (IZT) | 2.5 mA - operating point where VZ and dynamic impedance are specified |
| Dynamic Impedance (ZZT) | 350 Ω @ IZT - determines regulation stiffness under load transients |
| Max Regulator Current (IZM) | 9 mA @ TA = 50°C - sets usable current range before thermal derating limits conduction |
| Power Dissipation | 1.0 W @ TEC < 125°C - requires thermal management via end-cap heatsinking or board copper |
| Operating Temperature | –65°C to +175°C - enables deployment in extended industrial, avionics, and downhole systems |
| Surge Current (IS) | 3000 mA - withstands short-duration transients without degradation |
Pinout & Package
Package: DO-213AB glass MELF (hermetically sealed, leadless cylindrical surface-mount). Cathode indicated by single black band; device operated with banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Unmarked end; connects to circuit ground or lower-potential node during regulation |
| Cathode | Zener breakdown terminal | Banded end; connects to regulated voltage node or error amplifier input in feedback loops |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF package | DO-213AB outline ensures zero moisture ingress and long-term parameter stability in harsh environments |
| Radiation hardness | Inherently radiation-hardened per MicroNote 050 - qualified for space-qualified and nuclear instrumentation use |
| Tight voltage tolerance | ±5% (A-suffix) enables accurate voltage setting without post-calibration trimming |
| Low ESD sensitivity | Nonsensitive to electrostatic discharge - simplifies handling and assembly without special grounding protocols |
| RoHS-compliant plating | e3 suffix denotes annealed matte-tin terminations compliant with JEDEC J-STD-020 reflow profiles |
Applications
| Industrial Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated DC-DC converters using optocoupler-coupled feedback loops. IC Role / Device Role / Timing Role: Zener reference element providing precise 100 V threshold to error amplifier input. Use Value: Enables ±1% output regulation over –40°C to +125°C due to low tempco and hermetic stability. | Use Scenario: Generating stable bias voltage for radiation-tolerant op-amps in satellite telemetry conditioning circuits. IC Role / Device Role / Timing Role: Primary voltage reference source replacing less robust plastic-packaged Zeners. Use Value: Maintains regulation integrity after 100 krad(Si) total ionizing dose exposure per MicroNote 050. |
| Downhole Instrumentation Clamp | Medical Imaging HV Monitor |
Use Scenario: Overvoltage clamp protecting front-end ADC inputs in oil-well logging tools exposed to >150°C ambient. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input to 100 V ±5% during cable discharge events. Use Value: Survives continuous operation at +175°C with no parametric shift, validated per MIL-PRF-19500 screening options. | Use Scenario: Monitoring high-voltage X-ray generator rails (80–110 V range) with galvanically isolated sense circuitry. IC Role / Device Role / Timing Role: Precision shunt reference feeding isolated sigma-delta ADC reference path. Use Value: Delivers <10 ppm/°C tempco and <0.5% long-term drift - critical for diagnostic image linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BS-7-F | 300 mW SOT-23, 100 V ±5%, 150 Ω ZZT, 100 mA IZM | Lower power, higher IZM, but not radiation-hardened or hermetic | Select when board space is constrained and radiation/humidity are non-concerns |
| 1N4764A-T | Same 100 V ±5% spec, but DO-41 axial-leaded, 1.0 W, non-surface-mount | Requires through-hole assembly; lacks MELF's low-inductance and thermal performance | Select only for legacy through-hole designs or prototyping with breadboards |
Compared with MMBZ5265BS-7-F and 1N4764A-T, the 1N4764UR-1/TR uniquely combines 1.0 W surface-mount capability, hermetic DO-213AB packaging, radiation hardness, and extended temperature operation - making it irreplaceable in mission-critical high-reliability systems where parameter stability under stress is mandatory.
Availability
1N4764UR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage references, downhole instrumentation clamps, and medical imaging HV monitors requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4764UR-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 (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 1N4764UR-1/TR belongs to Microsemi's surface-mount Zener diode family designed specifically for high-density, low-parasitic, and high-stability voltage regulation in mission-critical systems where hermeticity and extended temperature operation are essential.
FAQ
What is the Zener voltage tolerance of the 1N4764UR-1/TR?
The 1N4764UR-1/TR has a nominal Zener voltage of 100 V with a ±5% tolerance, indicated by the "A" suffix in its full designation. This tolerance is guaranteed over the full operating temperature range of –65°C to +175°C and is verified per JEDEC test methods using dual-point impedance measurement.
Does the 1N4764UR-1/TR require special handling for ESD sensitivity?
No - the 1N4764UR-1/TR is explicitly characterized as nonsensitive to ESD per its datasheet. Its glass MELF construction and internal junction design eliminate the need for special ESD handling protocols during assembly or testing, unlike many plastic-packaged Zeners.
What does the "TR" suffix mean in 1N4764UR-1/TR?
The "TR" suffix indicates tape-and-reel packaging per EIA-481-B standard: 12 mm carrier tape, 1500 units per 7-inch reel. This format supports automated SMT placement and is required for high-volume manufacturing of boards using the 1N4764UR-1/TR.
Can the 1N4764UR-1/TR be used in radiation-intensive environments?
Yes - the 1N4764UR-1/TR is inherently radiation-hardened per MicroNote 050 and qualifies for use in space and nuclear applications. Its hermetic glass package prevents parameter shift under total ionizing dose (TID) exposure, distinguishing it from commercial-grade Zeners.
What is the thermal resistance of the 1N4764UR-1/TR when mounted on FR4?
When mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended footprint, the 1N4764UR-1/TR exhibits a thermal resistance of 130°C/W junction-to-ambient. This value is critical for calculating safe operating area under continuous 1.0 W dissipation at elevated ambient temperatures.
1N4764UR-1/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):
- 100 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 76 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)
1N4764UR-1/TR FAQ
1.How can I place an order for 1N4764UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4764UR-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 1N4764UR-1/TR reliable?
The price and inventory of 1N4764UR-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 1N4764UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4764UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4764UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4764UR-1/TR?
1N4764UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4764UR-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 1N4764UR-1/TR?
For technical support, including 1N4764UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4764UR-1/TR requirements.
6.How does Aetrix verify that 1N4764UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4764UR-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 1N4764UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4764UR-1/TR?
All 1N4764UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4764UR-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 1N4764UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4764UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4764UR-1/TR Tags
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