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Microchip Technology 1N5247BUR-1/TR
- Part No.:
- 1N5247BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5247BUR-1/TR.pdf
- Description:
- DIODE ZENER 17V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:658
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Product details
Overview
1N5247BUR-1/TR from Microsemi is a surface-mount 17 V, 500 mW Zener diode in DO-213AA (SOD80) MELF package with ±5% tolerance, 7.4 mA test current, and 19 Ω dynamic impedance at 25 °C - used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5247BUR-1/TR datasheet, 1N5247BUR-1/TR pinout, 1N5247BUR-1/TR application, or 1N5247BUR-1/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for industrial and aerospace-grade voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable output voltage across wide current (0.25–7.4 mA) and temperature (−65 to +175 °C) ranges. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
Thermal resistance junction-to-ambient is 250 °C/W on FR4 (1 oz Cu), requiring derating above 50 °C ambient or 125 °C end-cap temperature. Forward voltage is ≤1.1 V at 200 mA, confirming low-conduction-loss capability during transient forward bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 17 V ±5% at IZT = 7.4 mA - defines nominal regulation point for feedback networks |
| Power Dissipation PD | 0.5 W maximum - limits continuous thermal load on PCB without forced cooling |
| Dynamic Impedance ZZT | 19 Ω at IZT = 7.4 mA - determines output voltage stability under load variation |
| Reverse Leakage IR | ≤0.1 µA at VR = 13.3 V - ensures minimal quiescent current in high-impedance references |
| Temp. Coefficient αVZ | +0.084 %/°C - enables predictable drift compensation in temperature-critical references |
| Junction Temp. Range | −65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Package | DO-213AA (SOD80/MELF) - surface-mount, hermetically sealed, RoHS-compliant (e3) |
Pinout & Package
DO-213AA (SOD80) MELF package: hermetically sealed glass body with tin-lead or matte-tin plated end caps; cathode indicated by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection in reverse-bias configuration | Must be held at higher potential than anode to enable breakdown regulation |
| Anode (unbanded end) | Zener cathode connection in reverse-bias configuration | Reference ground or return path for regulated current flow |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing and intrinsic radiation hardness per MicroNote 050 |
| DO-213AA surface-mount package | Reduces board space vs. axial DO-35 while maintaining thermal performance (RθJEC = 100 °C/W) |
| 1% to 10% Zener tolerance options | Supports cost-optimized (A-suffix) or precision (D-suffix) reference designs without layout change |
| ESD immunity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling-sensitive assembly lines |
| RoHS-compliant (e3) commercial grade | Meets EU Directive 2011/65/EU without sacrificing Zener voltage stability or thermal margin |
Applications
| Power Supply Feedback Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or forward converters using TL431-compatible feedback networks. IC Role / Device Role / Timing Role: Provides stable 17 V reference to optocoupler input, enabling precise secondary-side voltage sensing. Use Value: Maintains ±1% output accuracy over −40 to +85 °C due to low dynamic impedance (19 Ω) and predictable tempco (+0.084 %/°C). |
Use Scenario: Clamping transient surges on 12 V automotive control bus lines during load dump events. IC Role / Device Role / Timing Role: Acts as shunt regulator to divert excess energy when line voltage exceeds 17 V threshold. Use Value: Limits peak voltage to 17.9 V (VZ + ΔVZ) with <0.1 µA leakage below clamp point, minimizing standby power loss. |
| Temperature-Stable Voltage Reference | Aerospace Sensor Biasing |
|
Use Scenario: Generating fixed bias for precision op-amp input stages in data acquisition front-ends. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift 17 V reference to instrumentation amplifier gain-setting network. Use Value: Delivers <10 ppm/°C drift after tempco compensation, enabled by documented +0.084 %/°C coefficient and tight 5% initial tolerance. |
Use Scenario: Providing regulated excitation voltage to RTD or strain gauge bridges in flight control sensors. IC Role / Device Role / Timing Role: Serves as radiation-hardened, MIL-PRF-19500 up-screenable voltage source for analog signal conditioning. Use Value: Operates reliably at 175 °C junction temperature and withstands total ionizing dose >100 krad(Si), per Microsemi radiation testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5247B-1TR | Same 17 V Zener voltage and 5% tolerance, but in axial DO-35 (DO-204AH) package | Requires through-hole PCB layout; higher RθJA (300 °C/W) limits power handling in compact designs | Select when legacy through-hole assembly or manual prototyping is required |
| BZX55C17-TR | 17 V, 5% tolerance, 500 mW, but in DO-35 package with 30 Ω ZZT and +0.08 %/°C tempco | Higher dynamic impedance reduces regulation accuracy under dynamic load; not radiation-hardened | Choose for cost-sensitive commercial applications where radiation tolerance and ultra-low ZZT are not required |
Compared with 1N5247B-1TR and BZX55C17-TR, the 1N5247BUR-1/TR offers superior thermal performance in surface-mount layouts, lower dynamic impedance for tighter regulation, and verified radiation hardness - making it preferred for space-constrained, high-reliability, or mission-critical systems.
Availability
1N5247BUR-1/TR is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage protection clamp, and temperature-stable voltage reference applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for 1N5247BUR-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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade analog and mixed-signal components.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener regulation in ruggedized surface-mount form for defense, avionics, and industrial systems demanding hermetic sealing and extended temperature operation.
FAQ
What is the Zener voltage tolerance and test current for 1N5247BUR-1/TR?
The 1N5247BUR-1/TR has a nominal Zener voltage of 17 V with ±5% tolerance, measured at a test current (IZT) of 7.4 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and is guaranteed across the full operating temperature range of −65 to +175 °C.
Is 1N5247BUR-1/TR RoHS compliant?
Yes, the 1N5247BUR-1/TR is RoHS compliant (e3 marking), meeting EU Directive 2011/65/EU. RoHS compliance applies only to the commercial-grade version; military-grade variants (e.g., JAN, JANTX) are not RoHS-compliant.
What package type does 1N5247BUR-1/TR use, and how is polarity marked?
The 1N5247BUR-1/TR uses the DO-213AA (SOD80/MELF) surface-mount glass package. Polarity is marked by a single cathode band on one end cap; the banded end must be biased positively relative to the unbanded end for proper Zener regulation.
Can 1N5247BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N5247BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) resilience exceeding 100 krad(Si). This makes it suitable for satellite, avionics, and nuclear instrumentation applications.
What is the maximum power dissipation and thermal derating behavior of 1N5247BUR-1/TR?
The 1N5247BUR-1/TR has a steady-state power dissipation rating of 0.5 W. Derating begins at 50 °C ambient (or 125 °C end-cap temperature) on FR4 with 1 oz copper, following a linear curve to zero power at 150 °C ambient, per Figure 2 in the official datasheet.
1N5247BUR-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):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 13 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
1N5247BUR-1/TR FAQ
1.How can I place an order for 1N5247BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5247BUR-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 1N5247BUR-1/TR reliable?
The price and inventory of 1N5247BUR-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 1N5247BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5247BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5247BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5247BUR-1/TR?
1N5247BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5247BUR-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 1N5247BUR-1/TR?
For technical support, including 1N5247BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5247BUR-1/TR requirements.
6.How does Aetrix verify that 1N5247BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5247BUR-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 1N5247BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5247BUR-1/TR?
All 1N5247BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5247BUR-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 1N5247BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5247BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5247BUR-1/TR Tags
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