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Microchip Technology 1N5271BUR-1
- Part No.:
- 1N5271BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5271BUR-1.pdf
- Description:
- DIODE ZENER 100V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
1N5271BUR-1 from Microsemi is a 100 V, 500 mW surface-mount Zener diode in DO-213AA (SOD80) MELF package, rated for ±5% voltage tolerance at 20 mA test current, with 500 Ω dynamic impedance and +0.110 %/°C temperature coefficient-used for precision voltage regulation in power supply reference circuits.
For engineers reviewing the 1N5271BUR-1 datasheet, 1N5271BUR-1 pinout, 1N5271BUR-1 application, or 1N5271BUR-1 equivalent, key selection criteria include Zener voltage stability across temperature, low leakage (<0.1 µA at 72 V), hermetic glass packaging for reliability, and compatibility with automated SMT assembly on FR4 boards.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable 100 V regulation over 1.3 mA to 185 mA operating current range. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050, while the DO-213AA package supports high thermal resistance management (RθJA = 250 °C/W on FR4).
The 1N5271BUR-1 exhibits minimal capacitance (~2.6 pF typical), low forward voltage (≤1.1 V @ 200 mA), and is non-sensitive to ESD per MIL-STD-750 Method 1020-making it suitable for space-constrained, high-reliability analog reference and overvoltage protection nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 100 V ±5% @ IZT = 1.3 mA - defines precise regulation point for feedback loops |
| Power Dissipation PD | 0.5 W - limits continuous thermal load on PCB without forced cooling |
| Zener Impedance ZZT | 500 Ω @ IZT - determines output voltage variation under load transients |
| Reverse Leakage IR | <0.1 µA @ 72 V - ensures negligible current draw in standby regulation mode |
| Temp. Coefficient αVZ | +0.110 %/°C - quantifies drift magnitude over -65°C to +175°C junction range |
| Junction Temp. Range | -65°C to +175°C - enables operation in extended industrial and aerospace environments |
| Package | DO-213AA (SOD80/MELF) - provides hermetic seal and high reliability in compact cylindrical form |
Pinout & Package
DO-213AA (SOD80) metallurgically bonded glass MELF package with cathode band marking; terminals are end caps-no discrete pins. Cathode is banded end; device regulates with banded end positive relative to opposite end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential side of load; sets reference voltage polarity |
| Anode (unbanded end) | Reference return path | Typically tied to ground or common rail; completes Zener bias circuit |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Metallurgical bonding | Ensures robust internal interconnect integrity under thermal cycling and vibration |
| Radiation hardness (per MicroNote 050) | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
| ESD insensitivity (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift-reduces handling precautions |
| RoHS-compliant option (e3 suffix) | Meets lead-free soldering requirements for commercial-grade assemblies |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Precision 100 V reference in isolated DC-DC converter feedback network. IC Role / Device Role / Timing Role: Zener diode providing stable voltage setpoint for optocoupler-based error amplifier loop. Use Value: Maintains ±0.55% regulation accuracy over -40°C to +85°C ambient due to known +0.110 %/°C TC and low 500 Ω ZZT. | Use Scenario: Overvoltage clamp protecting avionics sensor interface against transient surges. IC Role / Device Role / Timing Role: Passive shunt regulator absorbing energy above 100 V threshold during lightning-induced spikes. Use Value: Hermetic DO-213AA package and radiation hardness enable reliable operation in flight-critical systems per DO-160 Section 22. |
| Test Equipment Calibration Reference | Medical Imaging HV Bias Monitor |
Use Scenario: Stable 100 V reference in portable multimeter internal ADC reference divider. IC Role / Device Role / Timing Role: Low-leakage (<0.1 µA) Zener establishing accurate scaling ratio for 100 V full-scale measurement. Use Value: Minimal capacitance (2.6 pF) avoids signal coupling errors in high-impedance reference paths. | Use Scenario: Monitoring bias voltage stability in X-ray generator HV supply feedback loop. IC Role / Device Role / Timing Role: Regulation element verifying 100 V auxiliary rail integrity before system enable. Use Value: Junction temperature rating (-65°C to +175°C) supports operation near heat-generating HV transformers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5271B-1 (DO-35 axial) | Same electrical specs but axial-leaded DO-35 package; RθJA = 500 °C/W vs. 250 °C/W | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board design mandates axial components or manual rework is preferred |
| BZX55C100 (Vishay) | 100 V, ±5%, 500 mW, DO-35; ZZT = 700 Ω @ 1 mA; no radiation hardness documentation | Lacks MIL-PRF-19500 screening and radiation qualification | Choose for cost-sensitive commercial applications where radiation tolerance is not required |
Compared with 1N5271B-1 and BZX55C100, the 1N5271BUR-1 delivers superior thermal performance in SMT layouts, verified radiation hardness for mission-critical use, and tighter process control via metallurgical bonding-justifying its use where reliability outweighs cost.
Availability
1N5271BUR-1 is available at Aetrix Electronics and suitable for industrial power supplies, aerospace clamping circuits, and medical HV monitoring requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5271BUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N5271BUR-1 belongs to Microsemi's legacy Zener regulator family engineered for precision voltage reference and overvoltage protection in mission-critical systems where hermeticity, radiation tolerance, and thermal stability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for the 1N5271BUR-1?
The 1N5271BUR-1 has a nominal Zener voltage of 100 V with ±5% tolerance, measured at a test current (IZT) of 1.3 mA. This tolerance is guaranteed per the "B" suffix in the part number and applies across the full operating temperature range of -65°C to +175°C junction temperature.
Does the 1N5271BUR-1 support RoHS-compliant manufacturing?
Yes, the 1N5271BUR-1 is available in RoHS-compliant versions marked with the "e3" suffix (e.g., 1N5271BUR-1e3), featuring annealed matte-tin plating on end caps. These variants meet commercial-grade RoHS Directive 2011/65/EU requirements and are compatible with lead-free reflow profiles up to 260°C for 10 seconds.
What is the maximum reverse leakage current specification for the 1N5271BUR-1?
The 1N5271BUR-1 specifies a maximum reverse leakage current (IR) of 0.1 µA when biased at 72 V (0.72 × VZ). This ultra-low leakage ensures minimal power loss in high-impedance reference circuits and supports stable operation in battery-powered or low-quiescent-current designs.
Can the 1N5271BUR-1 be used in space-grade applications?
Yes-the 1N5271BUR-1 is inherently radiation-hardened per Microsemi MicroNote 050 and supports up-screening to MIL-PRF-19500 standards. While the base commercial "UR-1" variant is not screened, its metallurgically bonded glass structure and documented TID resilience make it a candidate for space-qualified derivatives when processed per JAN/JANTXV specifications.
What is the thermal resistance and derating behavior of the 1N5271BUR-1 on standard PCBs?
The 1N5271BUR-1 has a junction-to-ambient thermal resistance (RθJA) of 250 °C/W when mounted on an FR4 board with 1 oz copper and the recommended footprint. Full 0.5 W power dissipation is allowed only if end cap temperature remains below 125°C or ambient stays under 50°C; derating follows the curve in Figure 2 of the datasheet.
1N5271BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 76 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
1N5271BUR-1 FAQ
1.How can I place an order for 1N5271BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5271BUR-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 1N5271BUR-1 reliable?
The price and inventory of 1N5271BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5271BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5271BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5271BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5271BUR-1?
1N5271BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5271BUR-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 1N5271BUR-1?
For technical support, including 1N5271BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5271BUR-1 requirements.
6.How does Aetrix verify that 1N5271BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5271BUR-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 1N5271BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5271BUR-1?
All 1N5271BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5271BUR-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 1N5271BUR-1 part is unused and in its original packaging.
Return procedure for 1N5271BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5271BUR-1 Tags
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