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Microchip Technology 1N5275BUR-1
- Part No.:
- 1N5275BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5275BUR-1.pdf
- Description:
- DIODE ZENER 140V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,028
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Product details
Overview
1N5275BUR-1 from Microsemi is a 140 V, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) package with ±5% tolerance, 1300 Ω dynamic impedance at 0.9 mA test current, and +0.110 %/°C temperature coefficient. It regulates voltage in precision reference and overvoltage protection circuits across industrial power supplies and aerospace instrumentation.
For engineers reviewing the 1N5275BUR-1 datasheet, 1N5275BUR-1 pinout, 1N5275BUR-1 application, or 1N5275BUR-1 equivalent, key selection criteria include Zener voltage stability at high reverse bias, low leakage (<0.1 µA @ 101 V), thermal resistance (100 °C/W junction-to-end cap), and MIL-PRF-19500 upscreening eligibility for harsh-environment deployment.
Technical Context
This device operates as a two-terminal voltage reference in reverse breakdown mode, requiring no external bias circuitry. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050, while the MELF geometry provides uniform thermal dissipation and mechanical robustness under thermal cycling.
The 1N5275BUR-1 exhibits a positive temperature coefficient (+0.110 %/°C) typical of high-voltage Zeners (>100 V), enabling predictable drift compensation in temperature-stable references. Its 0.1 µA maximum reverse leakage at VR = 101 V supports low-power standby regulation without significant quiescent current penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 140 V ±5% at IZT = 0.90 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation PD | 0.5 W - limits continuous regulation current to ~3.6 mA at 140 V without heatsinking |
| Dynamic Impedance ZZT | 1300 Ω at IZT = 0.90 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | <0.1 µA at VR = 101 V - enables ultra-low standby current in battery-backed systems |
| Temp. Coefficient αVZ | +0.110 %/°C - quantifies voltage drift over -65°C to +175°C operating range |
| Junction Temp. TJ | -65°C to +175°C - supports operation in extended-temperature avionics and downhole tools |
| Thermal Resistance RθJEC | 100 °C/W - allows direct end-cap thermal coupling to PCB copper for passive cooling |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin end-cap plating. Cathode indicated by single band; banded end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; sinks current to maintain 140 V reference |
| Anode (unbanded end) | Reference return path | Connected to system ground or lower-potential node; completes Zener conduction loop |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded construction | Eliminates interfacial delamination risk under thermal shock and vibration |
| MIL-PRF-19500 upscreening option | Enables qualification for military/aerospace applications with traceable lot control |
| Radiation hardness (per MicroNote 050) | Supports operation in space-grade and nuclear instrumentation environments |
| Low capacitance (typ. <1.5 pF) | Minimizes high-frequency signal coupling in RF-sensitive analog front-ends |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift-reduces handling safeguards |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Precision 140 V reference in isolated DC-DC converter feedback networks. IC Role / Device Role / Timing Role: Zener diode providing stable voltage setpoint for optocoupler-based error amplification. Use Value: ±5% initial tolerance and +0.110 %/°C TC enable <±1.5% total drift over -40°C to +85°C ambient. | Use Scenario: Overvoltage protection on 120 V nominal aircraft bus lines. IC Role / Device Role / Timing Role: Crowbar element triggering shutdown when transient exceeds 140 V. Use Value: 0.1 µA leakage at 101 V prevents false trips during normal bus ripple. |
| Nuclear Instrumentation Bias Supply | Downhole Logging Sensor Reference |
Use Scenario: High-stability bias for gamma-ray detector photomultiplier tubes. IC Role / Device Role / Timing Role: Voltage reference establishing PMT dynode chain potential. Use Value: Radiation hardness ensures no parametric degradation after 100 krad(Si) exposure. | Use Scenario: Temperature-compensated reference in oil-well pressure transducers. IC Role / Device Role / Timing Role: Zener regulating excitation voltage for piezoresistive bridge. Use Value: -65°C to +175°C operating range accommodates deep-earth thermal gradients. |
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 | Same electrical specs but axial DO-35 package; no MELF geometry or end-cap thermal path | Limited to through-hole PCBs; unsuitable for high-density SMT layouts | Select 1N5275B only when legacy board assembly requires axial leads |
| BZX55C140 | 140 V ±5%, 500 mW, but DO-35 package and higher ZZT (1500 Ω); no MIL-PRF-19500 screening path | Commercial-only grade; lacks radiation hardness and ESD immunity documentation | Choose BZX55C140 for cost-sensitive consumer designs where upscreening is unnecessary |
Compared with 1N5275B and BZX55C140, the 1N5275BUR-1 uniquely combines surface-mount MELF packaging, MIL-PRF-19500 upscreening eligibility, and documented radiation hardness-making it the sole choice for high-reliability SMT deployments demanding extended temperature and radiation tolerance.
Availability
1N5275BUR-1 is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace voltage clamp, and nuclear instrumentation bias supply applications requiring stable component supply across long production lifecycles.
Supply support for 1N5275BUR-1 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) specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in ruggedized surface-mount form, targeting applications needing hermetic sealing, radiation tolerance, and extended temperature operation.
FAQ
What is the Zener voltage tolerance for 1N5275BUR-1?
The 1N5275BUR-1 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 at IZT = 0.90 mA falls between 133 V and 147 V under standard test conditions at 25°C.
Does 1N5275BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5275BUR-1 supports upscreening per MIL-PRF-19500 when ordered with appropriate reliability level prefixes (e.g., MQ, MX, MV, MSP). The base commercial part (no prefix) is not screened, but the design and process flow accommodate full military qualification upon request.
What is the maximum reverse leakage current for 1N5275BUR-1?
The 1N5275BUR-1 specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 101 V and TA = 25°C. This ultra-low leakage supports energy-efficient regulation in always-on monitoring circuits and battery-powered instrumentation.
Is 1N5275BUR-1 RoHS compliant?
Yes, RoHS-compliant versions of 1N5275BUR-1 are available with the "e3" suffix (e.g., 1N5275BUR-1e3), featuring annealed matte-tin end-cap plating. These are offered for commercial-grade use only; MIL-spec variants retain tin-lead plating per specification requirements.
What package type does 1N5275BUR-1 use?
The 1N5275BUR-1 uses the DO-213AA package-also known as SOD-80 or MELF-featuring a cylindrical metallurgically bonded glass body with solderable end caps. Its dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length.
1N5275BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N5275BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5275BUR-1 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 reliable?
The price and inventory of 1N5275BUR-1 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 is usually 5 days.
3.What payment methods are accepted for 1N5275BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5275BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5275BUR-1?
1N5275BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5275BUR-1 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?
For technical support, including 1N5275BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5275BUR-1 requirements.
6.How does Aetrix verify that 1N5275BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5275BUR-1 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 meets industry standards.
7.What is the process for return or replacement of 1N5275BUR-1?
All 1N5275BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5275BUR-1, 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 part is unused and in its original packaging.
Return procedure for 1N5275BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5275BUR-1 Tags
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