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Microchip Technology 1N5275BUR-1/TR
- Part No.:
- 1N5275BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5275BUR-1/TR.pdf
- Description:
- DIODE ZENER 140V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,162
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Product details
Overview
1N5275BUR-1/TR from Microsemi is a surface-mount 140 V, 500 mW Zener diode in DO-213AA (SOD80) MELF package with ±5% tolerance, 1300 Ω dynamic impedance at 0.9 mA test current, and +0.110 %/°C temperature coefficient-used for precision voltage reference and overvoltage clamping in high-reliability power supply feedback loops.
For engineers reviewing the 1N5275BUR-1/TR datasheet, 1N5275BUR-1/TR pinout, 1N5275BUR-1/TR application, or 1N5275BUR-1/TR equivalent, key selection criteria include Zener voltage stability across temperature, low leakage (<0.1 µA at 101 V), hermetic glass packaging for moisture resistance, and compatibility with automated SMT assembly per EIA-481-B tape-and-reel.
Technical Context
This device operates as a reverse-biased voltage regulator in its breakdown region, maintaining stable 140 V output across 0.9 mA to 106 mA operating current (IZK to IZM). Its metallurgically bonded glass construction ensures low thermal resistance (RθJEC = 100 °C/W) and radiation hardness per MicroNote 050.
The 1N5275BUR-1/TR exhibits minimal capacitance (~1.5 pF typical), enabling use in high-frequency voltage reference circuits. Its +0.110 %/°C temperature coefficient is specified over –65 °C to +175 °C junction range, supporting operation in extended-temperature industrial and aerospace environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 140 V ±5% at 0.9 mA - defines precise regulation point for high-voltage reference design |
| Power Dissipation (PD) | 0.5 W - limits continuous thermal load on PCB; derates above 50 °C ambient |
| Dynamic Impedance (ZZT) | 1300 Ω at IZT = 0.9 mA - indicates voltage regulation sensitivity to current variation |
| Reverse Leakage (IR) | <0.1 µA at 101 V - ensures minimal error current in high-impedance reference nodes |
| Temp. Coefficient (αVZ) | +0.110 %/°C - quantifies voltage drift over temperature; critical for stable long-term biasing |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in harsh environments without derating penalties |
| Package | DO-213AA (SOD80) MELF - hermetically sealed glass body with end-cap terminations for reliability |
Pinout & Package
DO-213AA (SOD80) MELF package: cylindrical glass body with metallized end caps; cathode indicated by single black band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; reverse-biased to maintain 140 V drop across load |
| Anode (unbanded end) | Reference ground node | Typically tied to system ground or feedback divider low-side; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation-enables >20-year field life in humid environments |
| Metallurgical bond interface | Reduces thermal resistance (RθJEC = 100 °C/W) for stable voltage regulation under pulsed loads |
| MIL-PRF-19500 upscreening option | Supports qualification to military screening levels (JANTX/JANTXV) without redesign |
| RoHS-compliant tin plating (e3 suffix) | Enables lead-free reflow compatibility while maintaining solderability per MIL-STD-750 method 2026 |
| Low capacitance (1.5 pF typ.) | Minimizes signal coupling in RF-sensitive reference paths and high-speed feedback networks |
Applications
| Industrial Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output of isolated DC-DC converters in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Zener reference element in TL431-based shunt regulator feedback network. Use Value: 140 V rating enables direct sensing of high-side auxiliary rails; ±5% tolerance ensures <±1% output accuracy after calibration. |
Use Scenario: Providing stable bias voltage for radiation-hardened op-amps in satellite telemetry conditioning circuits. IC Role / Device Role / Timing Role: Primary voltage reference for analog-to-digital converter (ADC) reference buffer stage. Use Value: Inherent radiation hardness and –65 °C to +175 °C operation eliminate need for shielding or thermal compensation. |
| Medical Imaging HV Bias | Test Equipment Calibration |
Use Scenario: Generating stable 140 V bias for photomultiplier tube (PMT) dynode chains in PET scanner front-end electronics. IC Role / Device Role / Timing Role: Precision Zener element in multi-stage resistive divider supplying graded dynode voltages. Use Value: Low leakage (<0.1 µA) prevents current-induced voltage droop across high-value divider resistors. |
Use Scenario: Serving as traceable voltage standard in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Fixed reference source for auto-zeroing and gain calibration routines. Use Value: +0.110 %/°C tempco allows accurate ambient-compensated calibration without oven control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5275B-1/TR | Same 140 V, ±5%, 0.5 W rating but in axial DO-35 package-not surface mount | Requires through-hole PCB layout; unsuitable for high-density SMT assemblies | Select when legacy board repair or manual prototyping demands axial lead form factor |
| BZX55C130 | 130 V nominal, ±5%, 500 mW, DO-35 package; higher leakage (≤5 µA at 104 V) | Lacks radiation hardness and MIL-PRF-19500 screening options | Acceptable for commercial-grade instrumentation where cost outweighs reliability requirements |
Compared with 1N5275B-1/TR and BZX55C130, the 1N5275BUR-1/TR delivers SMT compatibility, hermetic reliability, and aerospace-grade screening-making it the only choice for space-constrained, high-reliability systems requiring 140 V regulation.
Availability
1N5275BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace avionics, medical imaging subsystems, and test equipment calibration requiring stable component supply and long-term obsolescence management.
Supply support for 1N5275BUR-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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was developed to deliver JEDEC-standard Zener performance in hermetic surface-mount packages-with emphasis on radiation tolerance, thermal stability, and MIL-PRF-19500 compliance.
FAQ
What is the Zener voltage tolerance for 1N5275BUR-1/TR?
The 1N5275BUR-1/TR has a nominal Zener voltage of 140 V with a ±5% tolerance, corresponding to the "B" suffix in its nomenclature. This means the actual measured VZ falls between 133 V and 147 V at the specified test current of 0.9 mA, ensuring predictable regulation in high-voltage feedback networks.
Is 1N5275BUR-1/TR RoHS compliant?
Yes, the "e3" suffix in the full part number 1N5275BUR-1/TR/e3 (commonly abbreviated) indicates RoHS-compliant matte-tin plating on the end caps. This version meets EU Directive 2011/65/EU and is qualified for lead-free reflow soldering per J-STD-020.
What is the maximum reverse leakage current for 1N5275BUR-1/TR?
The 1N5275BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 101 V (72% of VZ). This ultra-low leakage preserves accuracy in high-impedance voltage divider and reference circuits where even nanoamp-level errors degrade performance.
Can 1N5275BUR-1/TR be used in high-temperature environments?
Yes-the 1N5275BUR-1/TR is rated for junction temperatures from –65 °C to +175 °C and features a low RθJEC of 100 °C/W. When mounted per recommended footprint on FR4, it sustains full 0.5 W dissipation up to 125 °C end-cap temperature, making it suitable for engine-control and downhole electronics.
What does the "UR" in 1N5275BUR-1/TR signify?
The "UR" denotes Microsemi's metallurgically bonded surface-mount package variant in DO-213AA (SOD80) MELF configuration. It distinguishes this hermetic glass construction from axial versions (e.g., "B-1") and confirms internal metallurgical bonding for enhanced thermal and mechanical reliability.
1N5275BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 140 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1300 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 106 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5275BUR-1/TR FAQ
1.How can I place an order for 1N5275BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5275BUR-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 1N5275BUR-1/TR reliable?
The price and inventory of 1N5275BUR-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 1N5275BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5275BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5275BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5275BUR-1/TR?
1N5275BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5275BUR-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 1N5275BUR-1/TR?
For technical support, including 1N5275BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5275BUR-1/TR requirements.
6.How does Aetrix verify that 1N5275BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5275BUR-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 1N5275BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5275BUR-1/TR?
All 1N5275BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5275BUR-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 1N5275BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5275BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5275BUR-1/TR Tags
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