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Microchip Technology 1N5245BUR-1/TR
- Part No.:
- 1N5245BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5245BUR-1/TR.pdf
- Description:
- DIODE ZENER 15V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:545
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Product details
Overview
1N5245BUR-1/TR from Microsemi is a surface-mount 15 V, 500 mW Zener diode in DO-213AA (SOD-80/MELF) package with ±5% tolerance, 8.5 Ω dynamic impedance at 20 mA, and 0.1 µA max reverse leakage at 10.5 V. It provides precision voltage regulation in compact power management circuits for industrial sensors and analog front-ends.
For engineers reviewing the 1N5245BUR-1/TR datasheet, 1N5245BUR-1/TR pinout, 1N5245BUR-1/TR application, or 1N5245BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, hermetic glass packaging for reliability, and compatibility with automated SMT assembly under RoHS-compliant reflow profiles.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, delivering stable 15 V regulation across 1–20 mA operating current and -65°C to +175°C junction temperature range. Its metallurgically bonded glass construction ensures low thermal resistance (RθJEC = 100°C/W) and radiation hardness per MicroNote 050.
The 1N5245BUR-1/TR exhibits a positive temperature coefficient of +0.082%/°C, enabling predictable drift compensation in temperature-sensitive references. Its minimal capacitance (<2 pF typical) and non-ESD-sensitive design (MIL-STD-750 Method 1020) support high-frequency noise suppression and robust operation in mixed-signal PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 15 V ±5% at IZT = 20 mA - defines nominal regulation point with tight production control. |
| Power Dissipation | 0.5 W steady-state - supports continuous regulation in space-constrained SMT layouts without forced cooling. |
| Dynamic Impedance ZZT | 8.5 Ω at 20 mA - ensures low output impedance for stable voltage under varying load currents. |
| Reverse Leakage IR | 0.1 µA max at VR = 10.5 V - minimizes quiescent current loss in battery-powered or low-power systems. |
| Junction Temperature Range | -65°C to +175°C - enables deployment in automotive under-hood, industrial motor drives, and aerospace environments. |
| Package | DO-213AA (SOD-80/MELF) - hermetically sealed glass body with end-cap terminations for high reliability and moisture resistance. |
| Forward Voltage VF | 1.1 V max at IF = 200 mA - allows safe forward conduction during transient clamping or polarity verification. |
Pinout & Package
DO-213AA (SOD-80/MELF) package: cylindrical glass body with metallized end caps; cathode indicated by single black band; no leads - terminals are axial end caps only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Zener anode connection in reverse bias | Connected to higher potential node during regulation; band-marked end must be biased positive relative to anode end. |
| Anode End Cap | Zener cathode connection in reverse bias | Connected to lower potential (e.g., ground or return path); unmarked end serves as reference node. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation, extending lifetime in humid or corrosive environments. |
| Metallurgical bonding | Reduces thermal interface resistance between silicon die and end cap, improving power handling and thermal stability. |
| Low capacitance (<2 pF) | Minimizes high-frequency signal coupling and noise injection in RF-adjacent or precision analog circuits. |
| Radiation hardness | Meets inherent radiation tolerance per Microsemi MicroNote 050 - suitable for space-qualified or nuclear instrumentation designs. |
| RoHS-compliant plating | Tin-lead or matte-tin end-cap finish compliant with commercial-grade RoHS directives (e3 suffix option). |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Reference Supply |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure/temperature transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 15 V bias to sensor Wheatstone bridges. Use Value: Maintains <±0.5% output variation over -40°C to +85°C ambient, ensuring consistent sensor gain and offset calibration. |
Use Scenario: Generating stable 15 V rail for microcontroller ADC reference and CAN transceiver bias in engine control units. IC Role / Device Role / Timing Role: Primary Zener regulator in discrete LDO pre-regulator stage before linear post-regulation. Use Value: Withstands automotive load-dump transients up to 40 V due to 200 V peak reverse rating and low leakage at elevated temperatures. |
| Medical Instrument Power Sequencing | Avionics Board-Level Protection |
Use Scenario: Providing isolated 15 V reference for analog front-end amplifiers in portable ECG monitors. IC Role / Device Role / Timing Role: Low-noise voltage clamp protecting ADC input stages from overvoltage during electrode contact faults. Use Value: Sub-2 pF capacitance prevents phase shift in high-gain, low-frequency bio-signal paths; 0.1 µA leakage preserves battery life. |
Use Scenario: Implementing redundant voltage supervision on flight-critical FPGA configuration rails in UAV guidance systems. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator used in triple-modular-redundant (TMR) reference monitoring chains. Use Value: Inherent TID tolerance (>100 krad(Si)) and SEE immunity enable operation in low-earth orbit without shielding overhead. |
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-1TR | Same 15 V, ±5%, DO-35 axial package; RθJA = 500°C/W vs. 250°C/W for DO-213AA; no hermetic seal. | Suitable for prototyping or through-hole boards; not recommended for high-reliability SMT or high-temp environments. | Select when board assembly uses wave soldering or legacy axial footprints; avoid where thermal performance or humidity resistance is critical. |
| BZX55C15-TR | 15 V, ±5%, DO-35; 100 Ω ZZT; 100 nA IR at 12 V; plastic package; no radiation hardening. | Lower cost for consumer-grade applications; insufficient for MIL-PRF-19500 screening or avionics use cases. | Choose for cost-sensitive, non-critical applications where long-term stability and radiation tolerance are not required. |
Compared with 1N5245B-1TR and BZX55C15-TR, the 1N5245BUR-1/TR delivers superior thermal performance, hermetic reliability, and radiation tolerance-making it the only option qualified for screened military and aerospace deployments requiring DO-213AA form factor.
Availability
1N5245BUR-1/TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU reference supplies, and medical instrument power sequencing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5245BUR-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 analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator family designed specifically for surface-mount applications demanding hermetic sealing, MIL-PRF-19500 screening capability, and stable voltage reference performance under extreme environmental stress.
FAQ
What is the Zener voltage tolerance and test current for the 1N5245BUR-1/TR?
The 1N5245BUR-1/TR has a nominal Zener voltage of 15 V with ±5% tolerance, verified at a test current IZT of 20 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and ensures regulation within 14.25 V to 15.75 V under standard conditions, supporting precise analog circuit design where voltage stability is critical.
Is the 1N5245BUR-1/TR RoHS compliant?
Yes, the 1N5245BUR-1/TR is RoHS compliant (e3 suffix), with annealed matte-tin end-cap plating meeting commercial-grade RoHS Directive 2011/65/EU requirements. It is not rated for lead-free reflow beyond 260°C for 10 seconds, and its hermetic glass package eliminates halogenated flame retardants found in plastic-packaged alternatives.
What is the maximum power dissipation and thermal resistance of the 1N5245BUR-1/TR?
The 1N5245BUR-1/TR has a steady-state power dissipation rating of 0.5 W and a junction-to-end-cap thermal resistance (RθJEC) of 100°C/W. When mounted on FR4 with 1 oz copper and proper footprint, its junction-to-ambient resistance is 250°C/W-enabling full-rated power operation below 50°C ambient or 125°C end-cap temperature.
Does the 1N5245BUR-1/TR have radiation hardness certification?
Yes, the 1N5245BUR-1/TR exhibits inherent radiation hardness per Microsemi MicroNote 050, validated for total ionizing dose (TID) tolerance exceeding 100 krad(Si) and single-event effect (SEE) immunity. While not formally certified to MIL-STD-883, its construction and screening history support use in low-earth orbit and nuclear instrumentation applications.
How is polarity marked on the 1N5245BUR-1/TR package?
The 1N5245BUR-1/TR uses a single black cathode band on one end cap to indicate polarity. During Zener regulation, the banded end must be connected to the higher-potential node (anode in reverse bias), while the unmarked end serves as the reference (cathode in reverse bias). This marking aligns with JEDEC DO-213AA standards and is visible under standard optical inspection.
1N5245BUR-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):
- 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/TR FAQ
1.How can I place an order for 1N5245BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5245BUR-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 1N5245BUR-1/TR reliable?
The price and inventory of 1N5245BUR-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 1N5245BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5245BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5245BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5245BUR-1/TR?
1N5245BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5245BUR-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 1N5245BUR-1/TR?
For technical support, including 1N5245BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5245BUR-1/TR requirements.
6.How does Aetrix verify that 1N5245BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5245BUR-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 1N5245BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5245BUR-1/TR?
All 1N5245BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5245BUR-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 1N5245BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5245BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5245BUR-1/TR Tags
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