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Microchip Technology 1N5243BUR-1/TR
- Part No.:
- 1N5243BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5243BUR-1/TR.pdf
- Description:
- DIODE ZENER 13V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,920
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Product details
Overview
1N5243BUR-1/TR from Microsemi is a surface-mount 13 V, 500 mW Zener diode in DO-213AA (SOD-80/MELF) package with ±5% tolerance, 9.4 V minimum and 9.9 V maximum Zener voltage at 9.5 mA test current, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5243BUR-1/TR datasheet, 1N5243BUR-1/TR pinout, 1N5243BUR-1/TR application, or 1N5243BUR-1/TR equivalent, this part delivers stable 13 V regulation with low dynamic impedance (13 Ω), minimal temperature coefficient (+0.079 %/°C), and radiation-hardened performance suitable for aerospace and industrial environments.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across a wide current range (0.25 mA to 9.5 mA), with specified Zener impedance measured at both knee (ZZK = 600 Ω @ 0.25 mA) and test current (ZZT = 13 Ω @ 9.5 mA). Its metallurgically bonded glass construction ensures hermetic sealing and reliability under thermal cycling.
The device exhibits low reverse leakage (≤0.5 µA @ 9.4 V), forward voltage ≤1.1 V @ 200 mA, and operates over -65 °C to +175 °C junction temperature. Its DO-213AA package supports reflow soldering up to 260 °C for 10 s and provides 100 °C/W junction-to-end-cap thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V nominal; 9.4–9.9 V min/max at IZT = 9.5 mA - defines regulation setpoint accuracy |
| Power Dissipation | 0.5 W steady-state - limits continuous current to ~38 mA at 13 V without derating |
| Zener Impedance | 13 Ω @ IZT = 9.5 mA - ensures tight voltage regulation under load transients |
| Reverse Leakage | ≤0.5 µA @ VR = 9.4 V - minimizes error in high-impedance bias/reference networks |
| Temp. Coefficient | +0.079 %/°C - predicts +10.3 mV/°C drift near 25 °C, critical for temp-stable references |
| Junction Temp. Range | -65 to +175 °C - enables operation in extended industrial, aerospace, and downhole applications |
| Package | DO-213AA (SOD-80/MELF) - hermetically sealed glass, RoHS-compliant matte-tin end caps |
Pinout & Package
DO-213AA (SOD-80/MELF) package: cylindrical glass body with two metallized end caps; cathode indicated by single black band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Connected to higher potential node; reverse-biased to enable breakdown regulation |
| Anode (unbanded end) | Zener cathode connection point | Connected to lower potential (e.g., ground or return); completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing and long-term stability under thermal stress and humidity |
| Radiation hardness per MicroNote 050 | Supports use in space-grade and nuclear instrumentation without additional shielding |
| MIL-PRF-19500 up-screening options | Available for high-reliability variants (JAN/JANTX/JANTXV/JANS) with traceable lot control |
| Low capacitance (typ. <1.5 pF) | Minimizes signal coupling and phase shift in RF bias and timing reference circuits |
| ESD robustness (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and board-level assembly |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference establishing 13 V threshold for TL431-like comparator action. Use Value: Tight 9.4–9.9 V tolerance and 13 Ω dynamic impedance ensure ±1% output regulation over line/load/temperature. |
Use Scenario: Provides stable excitation voltage for RTD or strain gauge bridge circuits. IC Role / Device Role / Timing Role: Low-drift 13 V Zener reference replacing bulkier IC references in analog front-ends. Use Value: +0.079 %/°C TC and ≤0.5 µA leakage minimize measurement offset drift in 0–70 °C industrial ranges. |
| Aerospace Voltage Monitor | Programmable Logic Controller Input Protection |
Use Scenario: Clamps and regulates auxiliary rail voltage in satellite power management units. IC Role / Device Role / Timing Role: Radiation-hardened Zener shunt regulator maintaining 13 V bus integrity under TID exposure. Use Value: Inherent radiation hardness per MicroNote 050 eliminates qualification overhead for LEO missions. |
Use Scenario: Protects 24 V digital input channels from overvoltage transients and ESD events. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting input to 13 V while sinking surge current. Use Value: 0.5 W rating and 100 °C/W RθJEC allow sustained clamping without thermal runaway in 80 °C 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 |
|---|---|---|---|
| 1N5243B-1TR | Same 13 V rating and DO-35 axial package; 250 °C/W RθJA vs. 250 °C/W for DO-213AA; no MIL-PRF-19500 screening option | Preferred for through-hole prototyping or legacy board reuse; lacks MELF's thermal performance and hermeticity | Select when board layout prohibits SMT or when axial lead form factor is required for mechanical retention |
| BZX55C13-TR | 13 V, ±5%, 500 mW in DO-35; 600 Ω ZZK vs. 600 Ω; 15 Ω ZZT vs. 13 Ω; non-radiation-hardened; RoHS only | Suitable for commercial-grade consumer electronics; not qualified for aerospace or high-reliability industrial use | Choose for cost-sensitive, non-critical applications where radiation tolerance and MIL-spec screening are unnecessary |
Compared with 1N5243B-1TR and BZX55C13-TR, the 1N5243BUR-1/TR offers superior thermal resistance (100 °C/W J-to-EC), inherent radiation hardness, and hermetic MELF packaging-making it the only choice for mission-critical, high-temperature, or space-qualified voltage reference designs.
Availability
1N5243BUR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, aerospace voltage monitors, and programmable logic controller input protection requiring stable component supply and long-term obsolescence management.
Supply support for 1N5243BUR-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 components.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in hermetically sealed surface-mount packages for defense, space, and extended-temperature industrial systems.
FAQ
What is the Zener voltage tolerance of the 1N5243BUR-1/TR?
The 1N5243BUR-1/TR has a nominal Zener voltage of 13 V with a ±5% tolerance, meaning its actual regulation range is 9.4 V to 9.9 V when tested at 9.5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0232-1, and applies to all parts with the "B" suffix in the nomenclature.
Does the 1N5243BUR-1/TR require heatsinking in standard PCB layouts?
No, the 1N5243BUR-1/TR does not require external heatsinking under typical operating conditions. Its 0.5 W power rating and 100 °C/W junction-to-end-cap thermal resistance allow safe operation at full power with end-cap temperature maintained below 125 °C, provided the FR4 PCB uses the recommended footprint and 1 oz copper.
Is the 1N5243BUR-1/TR RoHS compliant?
Yes, the 1N5243BUR-1/TR is RoHS compliant (e3 marking), with annealed matte-tin plating on both end caps. RoHS compliance is limited to commercial-grade versions per the datasheet; military-grade variants (e.g., JAN/JANTX) retain tin-lead plating.
Can the 1N5243BUR-1/TR be used in place of the axial 1N5243B-1?
The 1N5243BUR-1/TR is the surface-mount DO-213AA equivalent of the axial 1N5243B-1, sharing identical electrical specs (VZ, IZT, ZZT, etc.), but differing in package, thermal path, and screening options. It is not a drop-in replacement due to different footprint and mounting method, though functionally interchangeable in circuit design.
What is the maximum reverse leakage current for the 1N5243BUR-1/TR at 9.4 V?
The maximum reverse leakage current for the 1N5243BUR-1/TR is 0.5 µA at VR = 9.4 V and TA = 25 °C, as specified in the Electrical Characteristics table. This low leakage ensures minimal error current in high-impedance reference and bias networks.
1N5243BUR-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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 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
1N5243BUR-1/TR FAQ
1.How can I place an order for 1N5243BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5243BUR-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 1N5243BUR-1/TR reliable?
The price and inventory of 1N5243BUR-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 1N5243BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5243BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5243BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5243BUR-1/TR?
1N5243BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5243BUR-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 1N5243BUR-1/TR?
For technical support, including 1N5243BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5243BUR-1/TR requirements.
6.How does Aetrix verify that 1N5243BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5243BUR-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 1N5243BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5243BUR-1/TR?
All 1N5243BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5243BUR-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 1N5243BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5243BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5243BUR-1/TR Tags
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