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Microchip Technology 1N5270BUR-1/TR
- Part No.:
- 1N5270BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5270BUR-1/TR.pdf
- Description:
- DIODE ZENER 91V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,484
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Product details
Overview
1N5270BUR-1/TR from Microsemi is a 91 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in power supply feedback loops, reference circuits, and overvoltage protection at 1.4 mA test current with 400 Ω dynamic impedance.
For engineers reviewing the 1N5270BUR-1/TR datasheet, 1N5270BUR-1/TR pinout, 1N5270BUR-1/TR application, or 1N5270BUR-1/TR equivalent, key selection criteria include Zener voltage stability across temperature (αVZ = +0.099 %/°C), low leakage (<0.1 µA @ 69 V), hermetic glass sealing, and MIL-PRF-19500 upscreening capability.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 91 V at IZT = 1.4 mA, exhibiting a positive temperature coefficient (+0.099 %/°C) typical for high-voltage Zeners above 60 V. Its metallurgically bonded glass construction ensures stable parametric performance under thermal cycling and radiation exposure.
Designed for DC regulation only, it delivers 500 mW steady-state power dissipation with thermal resistance RθJA = 250 °C/W on FR4 board and requires end-cap temperature control below 125 °C. It has no forward conduction role-VF = 1.1 V max @ 200 mA is specified solely for polarity verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 1.4 mA - sets precise regulation threshold for high-side sensing or clamp circuits |
| Power Dissipation (PD) | 0.5 W - limits continuous current to ~5.5 mA at 91 V without derating; requires thermal management above 50 °C ambient |
| Zener Impedance (ZZT) | 400 Ω @ IZT - indicates moderate regulation stiffness; output voltage shifts ~0.4 V per 1 mA load change near regulation point |
| Reverse Leakage (IR) | <0.1 µA @ VR = 69 V - ensures minimal error current in high-impedance reference dividers |
| Temp. Coefficient (αVZ) | +0.099 %/°C - predictable +8.9 V drift over 100 °C range; enables compensated reference design |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Package | DO-213AA (SOD-80/MELF) - cylindrical glass body with tin-lead or RoHS matte-tin end caps; cathode band marked |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package: cylindrical body with two metallized end caps; cathode identified by black band; no polarity-specific PCB footprint-symmetric mounting with band orientation indicating cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point in reverse bias | Connected to higher potential node; regulates voltage when reverse-biased above 91 V |
| Anode (unbanded end) | Zener cathode connection point in reverse bias | Connected to lower potential node (e.g., ground or feedback node); completes regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing and radiation hardness per MicroNote 050-critical for space-grade analog references |
| MIL-PRF-19500 upscreening option | Supports qualified screening levels (JAN/JANTX/JANTXV/JANS) for military/aerospace programs requiring traceable reliability data |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and phase shift in high-frequency feedback paths and RF bias networks |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift-reduces handling sensitivity during SMT assembly |
| RoHS-compliant version (e3 suffix) | Available for commercial-grade use with annealed matte-tin plating compatible with lead-free reflow profiles |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference sets upper threshold for TL431-like shunt regulator or drives optocoupler LED directly. Use Value: 91 V rating allows direct sensing of 48 V or 24 V secondary-side rails with margin; ±5% tolerance ensures stable regulation across line/load transients. | Use Scenario: Provides stable excitation voltage for bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: High-impedance voltage reference source for ratiometric ADC biasing and sensor excitation. Use Value: Sub-0.1 µA leakage prevents loading of high-Z sensor bridges; +0.099 %/°C TC enables predictable compensation in wide-temperature environments. |
| Overvoltage Clamp Protection | High-Voltage Bias Network |
Use Scenario: Clamps transient surges on telecom line cards or PoE-powered equipment interfaces. IC Role / Device Role / Timing Role: Fast-acting shunt limiter that conducts above 91 V to protect downstream FETs or ICs. Use Value: 500 mW rating sustains short-duration surges; glass package withstands repeated avalanche stress without degradation. | Use Scenario: Generates stable bias for vacuum fluorescent displays (VFDs), photomultiplier tubes (PMTs), or high-voltage op-amp stages. IC Role / Device Role / Timing Role: Precision DC voltage source in series-regulated high-voltage supply chains. Use Value: Low capacitance avoids noise coupling into sensitive analog front-ends; hermetic seal prevents parameter drift in humid enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5270B-1/TR | Same electrical specs but in axial DO-35 package; lacks hermetic glass seal and MIL upscreening path | Suitable for cost-sensitive consumer PCBs where MELF footprint is unavailable or thermal cycling is not required | Select when board space permits axial leads and radiation/long-term stability are not critical |
| BZX55C91-TR | 91 V ±5%, 500 mW, DO-35 package; higher ZZT (500 Ω), wider temp range (–65 to +175 °C), no MIL screening option | Common in automotive ECUs and industrial controls where standard JEDEC compliance suffices | Choose for broad distributor availability and legacy design compatibility; verify leakage (<1 µA @ 73 V) meets system requirements |
Compared with 1N5270B-1/TR and BZX55C91-TR, the 1N5270BUR-1/TR offers superior long-term stability via metallurgical bonding and radiation hardness-making it preferred for aerospace, medical, and high-reliability embedded systems where parameter drift must be minimized over decades.
Availability
1N5270BUR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamps, and high-voltage bias networks requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5270BUR-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) specialized in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N5270BUR-1/TR belongs to Microsemi's legacy 1N52xxBUR-1 Zener family-engineered for precision voltage regulation in mission-critical systems demanding hermetic packaging, radiation tolerance, and MIL-spec screening capability.
FAQ
What is the Zener voltage tolerance and test current for the 1N5270BUR-1/TR?
The 1N5270BUR-1/TR has a nominal Zener voltage of 91 V with a ±5% tolerance, verified at a test current (IZT) of 1.4 mA. This tolerance is guaranteed per the "B" suffix in the part number and applies under standard conditions of TA = 25 °C. The device maintains regulation within this band across its full operating temperature range when properly heatsinked.
Does the 1N5270BUR-1/TR support MIL-PRF-19500 screening?
Yes-the 1N5270BUR-1/TR supports MIL-PRF-19500 upscreening through Microsemi's nomenclature system: adding MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS) prefixes enables qualification to military reliability standards. The base commercial part (1N5270BUR-1/TR) is un-screened but shares identical electrical and mechanical characteristics with screened variants.
What is the maximum reverse leakage current specification for the 1N5270BUR-1/TR?
The 1N5270BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 69 V (75% of nominal VZ). This ultra-low leakage ensures minimal error in high-impedance reference circuits and preserves accuracy in battery-powered or low-power sensor interfaces where standby current matters.
Is the 1N5270BUR-1/TR RoHS compliant?
Yes-RoHS-compliant versions of the 1N5270BUR-1/TR are available with the "e3" suffix (e.g., 1N5270BUR-1e3/TR), featuring annealed matte-tin end-cap plating. These meet EU RoHS Directive 2011/65/EU and are qualified for commercial-grade applications; non-RoHS versions use tin-lead plating and are restricted to exempted uses.
What package type and marking does the 1N5270BUR-1/TR use?
The 1N5270BUR-1/TR uses the DO-213AA (SOD-80/MELF) metallurgically bonded glass package with cylindrical geometry and two solderable end caps. It is marked with a single cathode band only-no alphanumeric coding-indicating the banded end is the cathode terminal for reverse-bias operation.
1N5270BUR-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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 69 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
1N5270BUR-1/TR FAQ
1.How can I place an order for 1N5270BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5270BUR-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 1N5270BUR-1/TR reliable?
The price and inventory of 1N5270BUR-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 1N5270BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5270BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5270BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5270BUR-1/TR?
1N5270BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5270BUR-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 1N5270BUR-1/TR?
For technical support, including 1N5270BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5270BUR-1/TR requirements.
6.How does Aetrix verify that 1N5270BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5270BUR-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 1N5270BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5270BUR-1/TR?
All 1N5270BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5270BUR-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 1N5270BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5270BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5270BUR-1/TR Tags
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