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Microchip Technology 1N4753UR-1/TR
- Part No.:
- 1N4753UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N4753UR-1/TR.pdf
- Description:
- DIODE ZENER 36V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,898
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Product details
Overview
1N4753UR-1/TR from Microsemi is a surface-mount 1.0 W glass Zener diode with a nominal Zener voltage of 36 V, ±5% tolerance (A-suffix), 7.0 mA test current, 50 Ω dynamic impedance at IZT, and maximum reverse leakage of 5 μA at 27.4 V. It operates from –65 °C to +175 °C and is used for precision voltage regulation in high-density power supply feedback loops and reference circuits.
For engineers reviewing the 1N4753UR-1/TR datasheet, 1N4753UR-1/TR pinout, 1N4753UR-1/TR application, or 1N4753UR-1/TR equivalent, key selection criteria include its DO-213AB MELF glass package, hermetic sealing, radiation-hardened construction per MicroNote 050, and tight thermal resistance (130 °C/W on FR4).
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown. Its Zener voltage is stabilized across a broad current range (IZK = 0.25 mA to IZM = 1000 mA) and temperature span (–65 °C to +175 °C), with specified knee impedance (ZZK = 25 Ω at IZK) and low capacitance per Figure 2.
The DO-213AB glass MELF package enables low parasitic inductance and capacitance, supporting stable regulation in switching power supplies and analog reference designs. Polarity is marked by a cathode band; operation requires the banded end to be positive relative to the anode during Zener conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - defines regulated output voltage in feedback networks and voltage references |
| Power Dissipation | 1.0 W at TEC < 125 °C - sets maximum continuous power handling on end cap |
| Test Current (IZT) | 7.0 mA - standard bias point for measuring VZ and dynamic impedance |
| Dynamic Impedance (ZZT) | 50 Ω at IZT - determines regulation sensitivity to load current changes |
| Reverse Leakage (IR) | 5 μA at 27.4 V - ensures minimal error current in high-impedance reference nodes |
| Operating Temperature | –65 °C to +175 °C - supports deployment in aerospace, downhole, and industrial environments |
| Thermal Resistance | 130 °C/W junction-to-ambient on FR4 - informs PCB copper area and heatsinking requirements |
Pinout & Package
Package: DO-213AB glass MELF (hermetically sealed, leadless, cylindrical surface-mount). Dimensions: A = 2.39–2.66 mm (diameter), B = 4.80–5.20 mm (length), C = 0.41–0.55 mm (band width). Cathode indicated by single black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential side in Zener mode; defines reference voltage polarity |
| Anode (unmarked end) | Reference return path | Connected to lower-potential side (e.g., ground or feedback node); completes regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables long-term stability and reliability in harsh environments including high humidity and radiation exposure |
| Inherent radiation hardness | Qualified per MicroNote 050 - suitable for space-grade and nuclear instrumentation applications without additional hardening |
| Low parasitic capacitance | Specified in Figure 2 - minimizes high-frequency noise coupling in precision analog and switching regulator circuits |
| ESD insensitivity | No special handling required - simplifies manufacturing and reduces assembly yield loss |
| RoHS-compliant option (e3 suffix) | Meets EU Directive 2011/65/EU - supports compliance-critical industrial and medical product programs |
Applications
| Switching Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener diode provides stable 36 V reference for TL431 or optocoupler LED biasing. Use Value: Tight ±5% tolerance and low ZZT ensure consistent regulation accuracy across line/load transients and temperature drift. |
Use Scenario: Providing excitation voltage for RTD or bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Serves as precision shunt reference in ratiometric measurement circuits. Use Value: Hermetic glass package and –65 °C to +175 °C rating maintain calibration integrity in uncontrolled ambient conditions. |
| Aerospace Voltage Clamp | Downhole Instrumentation Reference |
Use Scenario: Clamping transient overvoltage on avionics bus lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Acts as fast-reacting shunt protector downstream of TVS diodes. Use Value: Radiation hardness and 1000 mA surge current rating (IS) enable survivability in high-radiation flight envelopes. |
Use Scenario: Generating stable bias for MEMS accelerometers and piezoresistive transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Functions as primary voltage reference in high-temperature data acquisition front-ends. Use Value: 175 °C max operating temperature and hermetic seal prevent parameter shift under sustained thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4753A-TR | Same 36 V ±5%, but in DO-41 axial package - higher thermal resistance (150 °C/W), no radiation hardness claim | Preferred for through-hole prototyping or legacy board rework where MELF placement is unavailable | Select only if surface-mount assembly capability is limited; not suitable for high-reliability or high-temp deployments |
| SMAJ4753A | Same electrical specs, but in SMA package - plastic body, lower max temp (150 °C), no hermetic seal or radiation qualification | Used in cost-sensitive consumer power supplies where environmental robustness is secondary | Choose for volume production with automated pick-and-place; avoid in aerospace, defense, or energy exploration |
Compared with 1N4753UR-1/TR, the 1N4753A-TR offers mechanical compatibility with through-hole designs but sacrifices thermal performance and reliability; SMAJ4753A delivers lower cost and ease of assembly but lacks hermeticity and radiation tolerance critical for mission-critical systems.
Availability
1N4753UR-1/TR is available at Aetrix Electronics and suitable for switching power supply feedback, industrial sensor reference, aerospace voltage clamp, and downhole instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4753UR-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 aerospace, defense, and industrial markets.
The 1N4753UR-1/TR belongs to Microsemi's surface-mount Zener diode family designed for voltage regulation in extreme-environment applications where hermeticity, temperature resilience, and radiation immunity are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4753UR-1/TR?
The 1N4753UR-1/TR has a nominal Zener voltage of 36 V with a ±5% tolerance, indicated by the "A" suffix in its designation. This tolerance is verified at 30 °C with 7.0 mA test current and applies across its full operating temperature range of –65 °C to +175 °C. The 1N4753UR-1/TR maintains this specification due to its hermetically sealed glass MELF construction and process-controlled doping.
Is 1N4753UR-1/TR RoHS compliant?
Yes, the "e3" suffix in the full part number (1N4753UR-1/TR-e3) denotes RoHS compliance per EU Directive 2011/65/EU. Standard 1N4753UR-1/TR units may use tin-lead plating unless otherwise specified; RoHS-compliant versions use annealed matte-tin plating per MIL-STD-750, method 2026. Confirm suffix at time of order.
What is the maximum surge current rating for 1N4753UR-1/TR?
The 1N4753UR-1/TR has a maximum surge current (IS) of 1000 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25 °C ambient. This rating enables transient clamping in power supply input stages and protects downstream circuitry from short-duration overvoltage events without degradation.
How does the DO-213AB package affect thermal performance of 1N4753UR-1/TR?
The DO-213AB glass MELF package gives the 1N4753UR-1/TR a junction-to-ambient thermal resistance of 130 °C/W when mounted on FR4 with 1 oz copper and the recommended pad layout. Its junction-to-end-cap resistance is 50 °C/W, enabling higher power dissipation when thermally coupled to a heatsink or metal-core PCB - a key advantage over plastic SMD packages.
Does 1N4753UR-1/TR require special ESD handling during assembly?
No, the 1N4753UR-1/TR is nonsensitive to ESD per manufacturer specification and requires no special handling beyond standard static-safe practices. Its glass MELF structure and internal design eliminate gate oxide or junction vulnerabilities common in MOS devices, making it robust for high-volume SMT lines without added process controls.
1N4753UR-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):
- 36 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 27.4 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)
1N4753UR-1/TR FAQ
1.How can I place an order for 1N4753UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4753UR-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 1N4753UR-1/TR reliable?
The price and inventory of 1N4753UR-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 1N4753UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4753UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4753UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4753UR-1/TR?
1N4753UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4753UR-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 1N4753UR-1/TR?
For technical support, including 1N4753UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4753UR-1/TR requirements.
6.How does Aetrix verify that 1N4753UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4753UR-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 1N4753UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4753UR-1/TR?
All 1N4753UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4753UR-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 1N4753UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4753UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4753UR-1/TR Tags
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