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Microchip Technology 1N5245BUR-1
- Part No.:
- 1N5245BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5245BUR-1.pdf
- Description:
- DIODE ZENER 15V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,506
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Product details
Overview
1N5245BUR-1 from Microsemi is a 15 V, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) package with ±5% tolerance, 8.5 Ω dynamic impedance at 20 mA, and +0.082 %/°C temperature coefficient. It regulates voltage in low-power reference and bias circuits across industrial temperature ranges.
For engineers reviewing the 1N5245BUR-1 datasheet, 1N5245BUR-1 pinout, 1N5245BUR-1 application, or 1N5245BUR-1 equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for precision voltage reference design.
Technical Context
The 1N5245BUR-1 operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 15 V output across 0.1–20 mA operating current. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
It exhibits minimal junction capacitance (~2 pF typical), low forward voltage (≤1.1 V @ 200 mA), and a positive temperature coefficient (+0.082 %/°C), making it suitable for temperature-stable biasing where drift compensation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 15 V ±5% at 20 mA - defines nominal regulation point with predictable tolerance band for reference accuracy |
| Power Dissipation PD | 0.5 W - limits continuous power handling; requires thermal derating above 50 °C ambient or 125 °C end cap |
| Dynamic Impedance ZZT | 8.5 Ω @ 20 mA - determines output voltage stability under load variation; lower value improves regulation |
| Reverse Leakage IR | 0.1 µA @ 10.5 V - ensures negligible current draw below knee voltage, critical for low-power standby circuits |
| Temp. Coefficient αVZ | +0.082 %/°C - quantifies voltage drift with temperature; enables compensation in multi-device references |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Forward Voltage VF | ≤1.1 V @ 200 mA - defines conduction threshold in forward bias; relevant for polarity protection or clamp use |
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 black band; banded end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection in reverse-bias configuration | Connected to higher potential node; sets regulated voltage at cathode relative to anode |
| Anode (unbanded end) | Zener cathode connection in reverse-bias configuration | Typically grounded or tied to lowest system potential; completes regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing and intrinsic radiation hardness per MicroNote 050 without external shielding |
| DO-213AA MELF package | Provides superior thermal performance vs. SOD-123 (RθJA = 250 °C/W on FR4) and mechanical robustness in automated assembly |
| Low capacitance (~2 pF) | Minimizes signal coupling and high-frequency noise injection in RF bias and timing circuits |
| ESD insensitivity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and board-level integration |
| RoHS-compliant option (e3 suffix) | Meets EU Directive 2011/65/EU for commercial-grade applications without lead content restrictions |
Applications
| Reference Voltage Generation | Overvoltage Protection Clamping |
|---|---|
Use Scenario: Providing stable 15 V reference for ADC voltage dividers and op-amp feedback networks in sensor signal conditioning modules. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise DC bias point independent of supply fluctuations. Use Value: Delivers ±5% initial accuracy and +0.082 %/°C drift control, enabling <1% total error over –40 to +85 °C without active compensation. | Use Scenario: Limiting transient voltage spikes on 12 V automotive CAN bus power rails during load dump events. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground when input exceeds 15 V breakdown threshold. Use Value: Withstands 0.5 W steady-state dissipation and handles short-duration surges up to 125 °C end-cap temperature per derating curve. |
| Temperature-Stable Biasing | Low-Power Standby Regulation |
Use Scenario: Setting collector bias for RF transistor amplifiers requiring minimal thermal drift in baseband front-end designs. IC Role / Device Role / Timing Role: Zener diode operating near 20 mA test current to leverage flat region of VZ vs. IZ curve. Use Value: 8.5 Ω dynamic impedance ensures <0.2 V shift across 5 mA load variation, maintaining amplifier gain stability. | Use Scenario: Maintaining real-time clock (RTC) backup voltage at 3.3 V logic level using resistor-Zener divider from coin-cell battery. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA @ 10.5 V) shunt regulator preserving battery life in always-on systems. Use Value: Enables >10-year RTC operation on CR2032 due to sub-microamp quiescent current below regulation threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5245B-1 | Same 15 V ±5% spec but in axial DO-35 (DO-204AH) package; RθJA = 500 °C/W vs. 250 °C/W for DO-213AA | Requires through-hole PCB layout; unsuitable for high-density SMT assemblies or automated pick-and-place | Select when legacy through-hole compatibility or manual prototyping is prioritized over thermal performance |
| BZX55C15 | 15 V ±5%, 500 mW, DO-35 package; higher ZZT = 15 Ω and wider temp coefficient (±0.08 %/°C vs. +0.082 %/°C) | Lacks radiation hardness certification and MIL-PRF-19500 screening options; not rated for aerospace use | Select for cost-sensitive commercial applications where radiation tolerance and military screening are unnecessary |
Compared with 1N5245B-1 and BZX55C15, the 1N5245BUR-1 offers superior thermal resistance, hermetic MELF packaging for reliability, and documented radiation hardness-making it preferred for space-constrained, high-reliability, or radiation-prone environments.
Availability
1N5245BUR-1 is available at Aetrix Electronics and suitable for precision voltage reference generation, overvoltage clamping, and low-power standby regulation requiring stable component supply across industrial, aerospace, and medical electronics programs.
Supply support for 1N5245BUR-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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete devices, and radiation-hardened components.
The 1N52xxBUR-1 series belongs to Microsemi's precision Zener voltage regulator product line, engineered for applications demanding hermetic sealing, extended temperature operation, and radiation tolerance in mission-critical systems.
FAQ
What is the Zener voltage tolerance and test current for the 1N5245BUR-1?
The 1N5245BUR-1 has a nominal Zener voltage of 15 V with ±5% tolerance, measured at a test current (IZT) of 20 mA. This tolerance is guaranteed per the "B" suffix in the part number and applies under standard conditions of TA = 25 °C with thermal equilibrium established after 20 seconds.
Does the 1N5245BUR-1 support RoHS compliance?
Yes, the 1N5245BUR-1 is available in RoHS-compliant form with the "e3" suffix (e.g., 1N5245BUR-1e3), featuring annealed matte-tin end-cap plating. RoHS versions are offered for commercial-grade applications only and meet EU Directive 2011/65/EU requirements.
What is the maximum power dissipation and thermal derating behavior of the 1N5245BUR-1?
The 1N5245BUR-1 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 PCB with 1 oz copper, following a linear slope of 2 mW/°C above that point, as defined in Figure 2 of the datasheet.
How does the temperature coefficient of the 1N5245BUR-1 affect its performance in wide-temperature applications?
The 1N5245BUR-1 has a positive temperature coefficient of +0.082 %/°C, meaning its Zener voltage increases by approximately 12.3 mV per °C rise above 25 °C. This predictable drift allows designers to compensate in multi-Zener references or select complementary devices for zero-drift configurations.
Is the 1N5245BUR-1 suitable for high-reliability or radiation-exposed environments?
Yes, the 1N5245BUR-1 is inherently radiation hard per Microsemi MicroNote 050 and supports up-screening to MIL-PRF-19500 standards. Its metallurgically bonded glass construction and hermetic DO-213AA package make it suitable for aerospace, defense, and nuclear instrumentation applications where TID tolerance is required.
1N5245BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
1N5245BUR-1 FAQ
1.How can I place an order for 1N5245BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5245BUR-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 1N5245BUR-1 reliable?
The price and inventory of 1N5245BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5245BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5245BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5245BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5245BUR-1?
1N5245BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5245BUR-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 1N5245BUR-1?
For technical support, including 1N5245BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5245BUR-1 requirements.
6.How does Aetrix verify that 1N5245BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5245BUR-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 1N5245BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5245BUR-1?
All 1N5245BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5245BUR-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 1N5245BUR-1 part is unused and in its original packaging.
Return procedure for 1N5245BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5245BUR-1 Tags
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