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Microchip Technology 1N4760AUR/TR
- Part No.:
- 1N4760AUR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N4760AUR/TR.pdf
- Description:
- DIODE ZENER 68V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
1N4760AUR/TR from Microsemi is a surface-mount 1.0 W glass-encapsulated Zener diode with nominal Zener voltage 68 V, ±5% tolerance (A suffix), 3.7 mA test current, 150 Ω dynamic impedance at IZT, and 5 μA maximum reverse leakage at 51.7 V. It operates from –65 °C to +175 °C and is used for precision voltage regulation in high-density power supply feedback loops.
For engineers reviewing the 1N4760AUR/TR datasheet, 1N4760AUR/TR pinout, 1N4760AUR/TR application, or 1N4760AUR/TR equivalent, key selection criteria include Zener voltage stability over temperature, low dynamic impedance for tight regulation, hermetic DO-213AB package suitability for high-reliability environments, and compatibility with automated SMT assembly using standard EIA-481-B tape-and-reel (TR) delivery.
Technical Context
This device implements a single-junction silicon Zener structure optimized for stable breakdown at 68 V under DC conditions, with specified knee impedance (ZZK = 13 Ω at IZK = 0.25 mA) confirming sharp turn-on behavior critical for reference accuracy. Its glass MELF (DO-213AB) construction provides hermetic sealing and inherent radiation hardness per MicroNote 050.
Thermal performance is defined by 50 °C/W junction-to-end-cap resistance and 130 °C/W junction-to-ambient on FR4 (1 oz Cu) with recommended pad layout. Forward voltage is capped at 1.2 V @ 200 mA, and surge capability reaches 2000 mA (½-sine, 1/120 s) - enabling robust transient suppression in regulated DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% at IZT = 3.7 mA - defines precise regulation point for feedback networks |
| Power Dissipation | 1.0 W at TEC < 125 °C - sets continuous thermal limit without derating |
| Dynamic Impedance (ZZT) | 150 Ω @ IZT - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 5 μA max @ VR = 51.7 V - ensures minimal quiescent current in standby mode |
| Operating Temperature | –65 °C to +175 °C - supports deployment in aerospace, downhole, and industrial control environments |
| Package | DO-213AB glass MELF - enables high-density placement and eliminates moisture ingress risk |
| Surge Current (IS) | 2000 mA (½-sine, 1/120 s) - withstands short-duration transients without degradation |
Pinout & Package
DO-213AB glass MELF package: cylindrical, leadless, hermetically sealed body with cathode band marking. Terminals are symmetric axial ends; polarity is indicated by a single black band - cathode is banded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Must be held at higher potential than anode for reverse-biased regulation; connects to feedback node in switching regulator error amplifiers |
| Anode (unbanded end) | Zener cathode connection point | Typically tied to ground or low-side reference; completes Zener current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates humidity-induced parameter drift and supports long-term reliability in harsh environments |
| ±5% Zener voltage tolerance (A suffix) | Enables use in applications requiring tighter regulation than standard ±10% parts without custom screening |
| Specified knee impedance (ZZK = 13 Ω) | Ensures stable conduction onset below rated current - critical for low-current reference designs |
| RoHS-compliant (e3 suffix) option | Meets environmental compliance requirements without sacrificing electrical or thermal performance |
| Tape-and-reel packaging (TR suffix) | Supports high-speed pick-and-place assembly with 1500 units per 7-inch reel per EIA-481-B standard |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback paths via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference element setting precise voltage threshold for TL431-like comparator operation. Use Value: 68 V rating allows direct sensing of 48 V or 54 V bus rails with margin; 150 Ω ZZT minimizes output ripple contribution. |
Use Scenario: Clamps transient overvoltage on DC input rails before downstream converters or microcontrollers. IC Role / Device Role / Timing Role: Standby shunt regulator activated only during overvoltage events above 68 V. Use Value: 2000 mA surge rating handles repetitive 100 V/100 ns transients; glass hermeticity prevents degradation after repeated clamping. |
| High-Temperature Sensor Interface | Aerospace Voltage Reference |
Use Scenario: Provides stable bias voltage for RTD or thermocouple signal conditioning circuits operating at >125 °C ambient. IC Role / Device Role / Timing Role: Precision Zener reference replacing IC-based references where extended temperature range is required. Use Value: Full –65 °C to +175 °C operation avoids thermal derating; 13 Ω ZZK ensures low-current stability at sensor bias points. |
Use Scenario: Supplies reference voltage for analog-to-digital conversion in satellite power management units. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference in non-redundant telemetry subsystems. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for additional shielding or qualification testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4760A (DO-41) | Same electrical specs (68 V, ±5%, 1.0 W), but axial-leaded DO-41 package with higher thermal resistance (150 °C/W vs. 130 °C/W on FR4) | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board design mandates axial leads or manual prototyping is preferred |
| SMAJ4760A | Same Zener voltage and tolerance, but SMA package (plastic, not glass); lower surge rating (1000 mA vs. 2000 mA) and no radiation hardness | Lacks hermetic seal and radiation tolerance; limited to commercial-grade applications | Select when cost sensitivity outweighs reliability requirements and RoHS compliance is mandatory |
Compared with 1N4760AUR/TR, the 1N4760A requires PCB hole drilling and offers inferior thermal performance, while SMAJ4760A sacrifices hermeticity and surge robustness for lower cost and plastic-package compatibility - making 1N4760AUR/TR optimal for high-reliability SMT deployments demanding long-term stability.
Availability
1N4760AUR/TR is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection, high-temperature sensor interface, and aerospace voltage reference applications requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for 1N4760AUR/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 analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4760AUR/TR belongs to Microsemi's surface-mount Zener diode family designed specifically for high-density, high-stability voltage regulation in mission-critical systems where hermetic sealing and wide temperature operation are essential.
FAQ
What is the Zener voltage tolerance for 1N4760AUR/TR?
The "A" suffix in 1N4760AUR/TR specifies a ±5% tolerance on the nominal 68 V Zener voltage, measured at 3.7 mA test current and 30 °C. This tolerance is tighter than the base 1N4760UR (±10%) and enables more accurate regulation in feedback circuits without requiring post-manufacture sorting or trimming. The 1N4760AUR/TR maintains this tolerance across its full operating temperature range.
Is 1N4760AUR/TR compatible with lead-free reflow soldering processes?
Yes, 1N4760AUR/TR supports lead-free reflow with a maximum solder temperature of 260 °C for 10 seconds, per MIL-STD-750 Method 2026. Its tin-lead or RoHS-compliant matte-tin plating ensures reliable wetting and joint integrity. The glass MELF body remains structurally stable under these thermal profiles, and no special pre-bake is required prior to assembly.
How does the DO-213AB package of 1N4760AUR/TR improve thermal performance versus DO-41?
The DO-213AB package of 1N4760AUR/TR achieves 130 °C/W junction-to-ambient thermal resistance on FR4 (1 oz Cu) with recommended pads, compared to ~150 °C/W for DO-41 versions like 1N4760A. This 13% improvement stems from superior end-cap thermal coupling and reduced interfacial resistance - directly enabling higher sustained power dissipation in compact SMT layouts without heatsinking.
Can 1N4760AUR/TR be used in radiation-exposed environments?
Yes, 1N4760AUR/TR exhibits inherent radiation hardness per MicroNote 050 due to its hermetically sealed glass MELF (DO-213AB) construction and silicon process. It has been characterized for total ionizing dose (TID) resilience and single-event effects (SEE) immunity in space-qualified applications - unlike plastic-packaged alternatives such as SMAJ4760A, which lack this qualification.
What is the maximum reverse leakage current for 1N4760AUR/TR at 51.7 V?
The maximum reverse leakage current for 1N4760AUR/TR is 5 μA at VR = 51.7 V (75% of nominal Zener voltage), tested per the manufacturer's specification. This low leakage ensures minimal power loss in standby modes and preserves regulation accuracy in high-impedance feedback networks where even nanoamp-level currents can induce offset errors.
1N4760AUR/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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 51.7 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)
1N4760AUR/TR FAQ
1.How can I place an order for 1N4760AUR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4760AUR/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 1N4760AUR/TR reliable?
The price and inventory of 1N4760AUR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4760AUR/TR is usually 5 days.
3.What payment methods are accepted for 1N4760AUR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4760AUR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4760AUR/TR?
1N4760AUR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4760AUR/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 1N4760AUR/TR?
For technical support, including 1N4760AUR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4760AUR/TR requirements.
6.How does Aetrix verify that 1N4760AUR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4760AUR/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 1N4760AUR/TR meets industry standards.
7.What is the process for return or replacement of 1N4760AUR/TR?
All 1N4760AUR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4760AUR/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 1N4760AUR/TR part is unused and in its original packaging.
Return procedure for 1N4760AUR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4760AUR/TR Tags
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