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Microchip Technology 1N4759UR-1/TR
- Part No.:
- 1N4759UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N4759UR-1/TR.pdf
- Description:
- DIODE ZENER 62V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,163
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Product details
Overview
1N4759UR-1/TR from Microsemi is a surface-mount 1.0 W glass Zener diode with nominal Zener voltage 62 V, ±5% tolerance (A-suffix), 4.0 mA test current, 125 Ω dynamic impedance at IZT, and 5 μA maximum reverse leakage at 47.1 V. It features DO-213AB hermetic glass MELF package, -65°C to +175°C operating temperature range, and is used for precision voltage regulation in high-reliability power supply feedback loops.
For engineers reviewing the 1N4759UR-1/TR datasheet, 1N4759UR-1/TR pinout, 1N4759UR-1/TR application, or 1N4759UR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (130°C/W on FR4), surge current rating (2000 mA), low capacitance, and RoHS-compliant e3 termination options.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across wide current (4.0–2000 mA) and temperature (-65°C to +175°C) ranges. Its glass hermetic DO-213AB construction ensures low parasitic capacitance and radiation hardness per MicroNote 050.
It is electrically equivalent to through-hole 1N4759A but optimized for surface-mount high-density PCBs. The cathode band marking and tin-lead or matte-tin plating ensure reliable solderability per MIL-STD-750 Method 2026, with 260°C/10 s reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at 4.0 mA - defines regulated output voltage in feedback networks |
| Power Dissipation | 1.0 W at TEC < 125°C - limits continuous thermal load on PCB copper area |
| Dynamic Impedance (ZZT) | 125 Ω at IZT = 4.0 mA - determines regulation sensitivity to load current changes |
| Reverse Leakage (IR) | 5 μA max at VR = 47.1 V - ensures minimal quiescent current in standby mode |
| Surge Current (IS) | 2000 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
| Operating Temperature | -65°C to +175°C - supports aerospace, downhole, and industrial environments |
| Thermal Resistance | 130°C/W junction-to-ambient on FR4 (1 oz Cu) - guides pad layout and copper pour design |
Pinout & Package
DO-213AB hermetically sealed glass MELF package: cylindrical body with axial terminals, cathode marked by single black band. No polarity-specific pins - bidirectional terminal function defined solely by cathode band orientation during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Must be held at higher potential than anode to enable Zener conduction and voltage regulation |
| Anode (unbanded end) | Reverse-biased cathode connection point | Reference node tied to ground or lower-potential rail in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables operation up to +175°C and intrinsic radiation hardness per MicroNote 050 |
| Low parasitic capacitance | Specified in Figure 2 - critical for high-frequency stability in switching regulator feedback paths |
| ±5% Zener voltage tolerance (A-suffix) | Meets standard precision requirements without need for post-production trimming |
| RoHS-compliant e3 termination | Matte-tin plating compatible with lead-free reflow profiles and MIL-STD-750 Method 2026 |
| Tape-and-reel packaging (TR suffix) | 1500 units per 7-inch reel - supports automated SMT assembly with EIA-481-B compliance |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 62 V threshold for TL431-type error amplifier biasing. Use Value: Maintains ±1% output regulation across line/load transients due to stable 62 V Zener point and low dynamic impedance. |
Use Scenario: Clamping input rail against surge events in 48 V telecom power distribution units. IC Role / Device Role / Timing Role: Passive crowbar element absorbing transient energy above 62 V before downstream ICs are stressed. Use Value: Withstands 2000 mA surge pulses without parametric shift, enabling robust Class III protection per IEC 61000-4-5. |
| High-Temperature Sensor Interface | Aerospace Power Conditioning |
Use Scenario: Providing stable bias voltage for RTD or thermocouple signal conditioning in engine control modules. IC Role / Device Role / Timing Role: Reference source for analog front-end ADC drivers operating continuously at 150°C ambient. Use Value: Guaranteed functionality from -65°C to +175°C eliminates derating concerns in under-hood electronics. |
Use Scenario: Voltage clamping in satellite power bus regulators exposed to total ionizing dose (TID). IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator maintaining bus integrity during proton irradiation events. Use Value: Inherent radiation hardness per MicroNote 050 avoids costly screening or shielding in LEO missions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4759A | Same 62 V ±5%, but DO-41 axial-leaded package; no MELF thermal performance | Requires through-hole mounting; unsuitable for high-density SMT designs | Select when legacy board repair or manual prototyping demands axial form factor |
| SMAJ4759A | Same electrical specs, but SMA package; higher thermal resistance (160°C/W vs 130°C/W) | Lower power handling on same PCB area; requires larger copper pads for equivalent cooling | Select when existing SMA footprint exists and JEDEC-standardized plastic package is preferred |
Compared with 1N4759A and SMAJ4759A, the 1N4759UR-1/TR delivers superior thermal performance in space-constrained SMT layouts while retaining identical Zener characteristics-enabling higher reliability in thermally aggressive environments without redesigning the regulator circuit.
Availability
1N4759UR-1/TR is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, high-temperature sensor interfaces, and aerospace power conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1N4759UR-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) specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4759UR-1/TR belongs to Microsemi's surface-mount Zener diode family designed for precision voltage regulation in harsh-environment applications where hermetic sealing, radiation tolerance, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4759UR-1/TR?
The 1N4759UR-1/TR has a nominal Zener voltage of 62 V with ±5% tolerance, indicated by the "A" suffix in its designation. This tolerance is verified at 4.0 mA test current and 30°C case temperature per the official Microsemi datasheet. Tighter tolerances (±2%, ±1%) are available with "C" or "D" suffixes, but the 1N4759UR-1/TR specifically uses the A-suffix configuration.
Does the 1N4759UR-1/TR support lead-free soldering processes?
Yes, the 1N4759UR-1/TR is offered with RoHS-compliant e3 termination-matte-tin plating qualified for lead-free reflow profiles up to 260°C for 10 seconds per MIL-STD-750 Method 2026. Its DO-213AB glass MELF body remains unaffected by standard SAC305 thermal cycles, making it fully compatible with modern SMT assembly lines.
How does the thermal performance of the 1N4759UR-1/TR compare to through-hole equivalents?
The 1N4759UR-1/TR achieves 130°C/W junction-to-ambient thermal resistance on FR4 with recommended pad layout, outperforming DO-41-based 1N4759A (typically >200°C/W). Its DO-213AB glass MELF construction enables more efficient heat transfer through end-cap contact, allowing higher sustained power dissipation in compact SMT designs without forced air or heatsinks.
Can the 1N4759UR-1/TR be used in radiation-intensive environments?
Yes, the 1N4759UR-1/TR exhibits inherent radiation hardness per MicroNote 050 due to its hermetically sealed glass construction and absence of organic passivation layers. It is routinely specified in satellite power systems and nuclear instrumentation where total ionizing dose (TID) resilience is required-no additional screening or qualification is needed beyond standard lot acceptance testing.
What is the maximum surge current rating for the 1N4759UR-1/TR?
The 1N4759UR-1/TR is rated for 2000 mA peak reverse surge current using a ½-sine wave pulse of 1/120 second duration at 25°C ambient, as defined in Note 3 of the Microsemi datasheet. This rating ensures survivability during common-mode transients in industrial power rails and telecom surge events per IEC 61000-4-5 Level 3.
1N4759UR-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):
- 62 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 47.1 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)
1N4759UR-1/TR FAQ
1.How can I place an order for 1N4759UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4759UR-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 1N4759UR-1/TR reliable?
The price and inventory of 1N4759UR-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 1N4759UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4759UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4759UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4759UR-1/TR?
1N4759UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4759UR-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 1N4759UR-1/TR?
For technical support, including 1N4759UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4759UR-1/TR requirements.
6.How does Aetrix verify that 1N4759UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4759UR-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 1N4759UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4759UR-1/TR?
All 1N4759UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4759UR-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 1N4759UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4759UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4759UR-1/TR Tags
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