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Microchip Technology 1N5248BUR-1
- Part No.:
- 1N5248BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5248BUR-1.pdf
- Description:
- DIODE ZENER 18V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,025
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Product details
Overview
1N5248BUR-1 from Microsemi is a 0.5 W surface-mount Zener diode with nominal Zener voltage of 18 V at 7.0 mA test current, ±5% tolerance (B suffix), 600 Ω maximum dynamic impedance at IZT, and temperature coefficient of +0.085 %/°C - used for precision voltage regulation in low-power analog reference and bias circuits.
For engineers reviewing the 1N5248BUR-1 datasheet, 1N5248BUR-1 pinout, 1N5248BUR-1 application, or 1N5248BUR-1 equivalent, key selection criteria include Zener voltage stability over temperature, low leakage (<0.1 µA at 13.3 V), MELF DO-213AA package thermal performance, and MIL-PRF-19500 upscreening eligibility.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable output across 1–20 mA regulation current range with minimal capacitance (typical <2 pF) and inherent radiation hardness per MicroNote 050. Its metallurgically bonded glass construction ensures hermetic sealing and reliability under thermal cycling.
The 1N5248BUR-1 exhibits positive temperature coefficient (+0.085 %/°C), indicating increasing Zener voltage with rising junction temperature - critical for compensation design in temperature-sensitive references. It supports solder reflow up to 260 °C and delivers 0.5 W steady-state dissipation when mounted on FR4 with 1 oz Cu.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18 V at 7.0 mA - defines precise regulation point for low-current reference nodes |
| Zener Impedance ZZT | 600 Ω max at IZT - limits output voltage variation under load current changes |
| Reverse Leakage IR | <0.1 µA at 13.3 V - ensures negligible error current in high-impedance bias networks |
| Power Dissipation PD | 0.5 W - sets maximum continuous power handling on standard FR4 PCB |
| Temp Coefficient αVZ | +0.085 %/°C - enables predictable drift modeling for temperature-compensated designs |
| Junction Temp Range | −65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Forward Voltage VF | 1.1 V max at 200 mA - defines forward conduction threshold for polarity verification |
Pinout & Package
DO-213AA (SOD-80 / MLL34) MELF glass package: hermetically sealed, metallurgically bonded, cathode band marked, end-cap terminals only - no discrete pins. Thermal resistance junction-to-end cap is 100 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Zener Anode Connection (reverse-bias terminal) | Connected to regulated output node; banded end must be held positive relative to anode for regulation |
| Anode End Cap | Zener Cathode Connection (reverse-bias terminal) | Connected to circuit ground or lower-potential rail; completes reverse-bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing and long-term parameter stability without moisture-induced drift |
| MIL-PRF-19500 upscreening option | Supports qualification for military/aerospace applications requiring enhanced reliability screening |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified low-dose-rate environments |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and phase shift in RF-coupled or high-frequency bias networks |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift - simplifies handling in uncontrolled assembly areas |
Applications
| Instrumentation Reference | Power Supply Feedback |
|---|---|
Use Scenario: Precision voltage reference in handheld multimeters and portable data loggers where battery life and thermal drift matter. IC Role / Device Role / Timing Role: Provides stable 18 V reference for ADC reference buffers and op-amp biasing. Use Value: ±5% initial tolerance and +0.085 %/°C TC enable <±1.5% total drift over −40 to +85 °C without trimming. | Use Scenario: Secondary-side voltage sensing in isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Sets regulation threshold for TL431-like shunt controller interface. Use Value: Low 0.1 µA leakage avoids loading feedback resistors, preserving loop accuracy at light loads. |
| RF Bias Network | Aerospace Sensor Conditioning |
Use Scenario: DC biasing of GaAs FET amplifiers in L-band transceivers where parasitic capacitance degrades gain flatness. IC Role / Device Role / Timing Role: Supplies stable gate bias while minimizing RF signal coupling via sub-2 pF junction capacitance. Use Value: Enables >20 dB return loss up to 2 GHz without additional decoupling components. | Use Scenario: Temperature-stable excitation source for RTD bridges in satellite thermal control systems. IC Role / Device Role / Timing Role: Delivers regulated 18 V to bridge arms with radiation-hardened stability. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in LEO missions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5248B-1 (DO-35) | Axial-leaded DO-35 package; identical electrical specs but higher RθJA (300 °C/W vs. 250 °C/W) | Suitable for prototyping or through-hole boards; less suitable for high-density SMT layouts | Select when manual assembly or legacy board compatibility is required |
| BZX55C18 (Vishay) | Same 18 V/5% spec, but plastic DO-35 package; no MIL-PRF-19500 screening or radiation hardness | Limited to commercial-grade industrial use; not qualified for aerospace or high-reliability programs | Select for cost-sensitive consumer applications where radiation tolerance is unnecessary |
Compared with 1N5248B-1 and BZX55C18, the 1N5248BUR-1 uniquely combines SMT MELF packaging, hermetic glass construction, MIL-PRF-19500 upscreening path, and documented radiation hardness - making it the only choice for space-qualified or mission-critical analog references.
Availability
1N5248BUR-1 is available at Aetrix Electronics and suitable for precision voltage reference, aerospace sensor conditioning, RF bias network, and isolated power supply feedback applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5248BUR-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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in hermetically sealed MELF packages for applications demanding long-term stability, thermal resilience, and qualification-ready reliability.
FAQ
What is the Zener voltage tolerance for 1N5248BUR-1?
The 1N5248BUR-1 has a nominal Zener voltage of 18 V with ±5% tolerance, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies at 25 °C with 7.0 mA test current and remains stable across its operating temperature range due to the device's metallurgically bonded construction. The 1N5248BUR-1 does not offer tighter tolerances unless specified by alternate suffixes like "C" (±2%) or "D" (±1%).
Is 1N5248BUR-1 RoHS compliant?
Yes, the 1N5248BUR-1 is available in RoHS-compliant versions (marked with "e3" suffix) for commercial-grade applications only. The RoHS-compliant variant uses annealed matte-tin plating on end caps and meets lead-free soldering requirements up to 260 °C for 10 seconds. Non-RoHS versions retain tin-lead plating and are designated without the "e3" suffix.
What package type does 1N5248BUR-1 use?
The 1N5248BUR-1 uses the DO-213AA (also known as SOD-80 or MLL34) MELF-style glass package - a hermetically sealed, cylindrical surface-mount configuration with metallurgically bonded internal structure. Its dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length, optimized for automated placement and thermal performance on FR4 PCBs.
Can 1N5248BUR-1 be used in radiation-exposed environments?
Yes, the 1N5248BUR-1 is inherently radiation hard per Microsemi MicroNote 050, validated for low-dose-rate environments typical of LEO satellite missions. Its glass/MELF construction and metallurgical bonding suppress displacement damage effects, enabling stable Zener voltage and leakage performance after total ionizing dose exposure - a capability not shared by plastic-packaged alternatives like BZX55C18.
What is the maximum reverse leakage current for 1N5248BUR-1?
The maximum reverse leakage current for 1N5248BUR-1 is 0.1 µA measured at 13.3 V (75% of nominal VZ). This ultra-low leakage supports high-impedance bias networks and precision reference dividers without introducing measurable error current. The specification holds across the full −65 to +175 °C junction temperature range and is verified per MIL-STD-750 Method 1020 for ESD immunity.
1N5248BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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
1N5248BUR-1 FAQ
1.How can I place an order for 1N5248BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5248BUR-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 1N5248BUR-1 reliable?
The price and inventory of 1N5248BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5248BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5248BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5248BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5248BUR-1?
1N5248BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5248BUR-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 1N5248BUR-1?
For technical support, including 1N5248BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5248BUR-1 requirements.
6.How does Aetrix verify that 1N5248BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5248BUR-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 1N5248BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5248BUR-1?
All 1N5248BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5248BUR-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 1N5248BUR-1 part is unused and in its original packaging.
Return procedure for 1N5248BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5248BUR-1 Tags
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