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Microchip Technology 1N5248BUR-1E3
- Part No.:
- 1N5248BUR-1E3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5248BUR-1E3.pdf
- Description:
- DIODE ZENER 18V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,311
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Product details
Overview
1N5248BUR-1E3 from Microsemi is a hermetically sealed, metallurgically bonded glass MELF Zener diode with nominal 18 V regulation at 7.0 mA test current, 5% voltage tolerance, 600 Ω dynamic impedance at IZT, and 0.5 W power dissipation in DO-213AA (SOD80/MLL34) package. It delivers stable voltage reference in precision analog power supplies and low-noise sensor biasing circuits.
For engineers reviewing the 1N5248BUR-1E3 datasheet, 1N5248BUR-1E3 pinout, 1N5248BUR-1E3 application, or 1N5248BUR-1E3 equivalent, this page provides verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and validated alternative parts for voltage reference design continuity.
Technical Context
This device operates as a two-terminal reverse-biased voltage regulator with a specified Zener voltage of 18 V ±5% at 7.0 mA, exhibiting a positive temperature coefficient of +0.085 %/°C. Its 600 Ω dynamic impedance at IZT and ≤0.1 µA reverse leakage at 13.3 V ensure tight regulation under varying load and temperature conditions.
The DO-213AA package enables surface-mount assembly with end-cap soldering per MIL-STD-750 Method 2026, and its metallurgical bond structure supports operation from –65 °C to +175 °C junction temperature while maintaining hermetic integrity and radiation hardness per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18 V ±5% at 7.0 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation PD | 0.5 W - limits continuous thermal load on PCB; requires derating above 50 °C ambient |
| Dynamic Impedance ZZT | 600 Ω at IZT - determines output voltage variation under load transients |
| Reverse Leakage IR | ≤0.1 µA at 13.3 V - ensures minimal error current in high-impedance reference nodes |
| Temp. Coefficient αVZ | +0.085 %/°C - quantifies drift magnitude across industrial temperature range |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in harsh environments including aerospace and downhole systems |
| Forward Voltage VF | ≤1.1 V at 200 mA - enables use as clamp or protection diode in forward conduction mode |
Pinout & Package
DO-213AA (SOD80 / MLL34) metallurgically bonded glass MELF package with cathode band marking; terminals are solderable end caps plated with RoHS-compliant matte tin (e3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Must be biased positive relative to anode to enter breakdown; band identifies polarity during placement |
| Anode (unbanded end) | Zener cathode connection point | Connected to circuit ground or lower potential node; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bonding | Ensures mechanical robustness and thermal stability under thermal cycling and vibration stress |
| Radiation hardness per MicroNote 050 | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
| Minimal capacitance (~1.5 pF typical) | Reduces high-frequency noise coupling into reference nodes and improves AC regulation fidelity |
| ESD insensitivity (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift-simplifies handling and board-level ESD protection |
Applications
| Industrial Power Supply Reference | Avionics Sensor Biasing |
|---|---|
Use Scenario: Precision 18 V reference for isolated DC-DC converter feedback networks in programmable logic controllers. IC Role / Device Role / Timing Role: Two-terminal Zener voltage reference providing stable regulation point for optocoupler-based error amplification. Use Value: Maintains <±1% output accuracy over –40 °C to +85 °C ambient due to low tempco and tight 5% tolerance. |
Use Scenario: Low-noise bias supply for piezoresistive pressure transducers in flight control systems. IC Role / Device Role / Timing Role: Passive voltage reference establishing fixed excitation voltage for Wheatstone bridge sensors. Use Value: Sub-pF capacitance and <0.1 µA leakage prevent signal distortion and offset drift in high-impedance sensor interfaces. |
| Downhole Instrumentation Regulator | Radiation-Hardened Backup Reference |
Use Scenario: Voltage stabilization in high-temperature logging tools operating at 150 °C wellbore environments. IC Role / Device Role / Timing Role: Primary Zener regulator supplying clean 18 V to analog front-end amplifiers and ADC drivers. Use Value: Junction temperature rating up to +175 °C and proven reliability under thermal shock enable uninterrupted operation. |
Use Scenario: Redundant reference source in satellite telemetry modules where single-event effects must be mitigated. IC Role / Device Role / Timing Role: Radiation-hardened passive reference replacing active ICs in fault-tolerant voltage monitoring paths. Use Value: Inherent TID hardness per MicroNote 050 eliminates need for shielding or redundancy overhead in critical subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5248B-1TR | Same 18 V ±5%, DO-35 axial package; no RoHS e3 marking; higher RθJA (300 °C/W vs. 250 °C/W) | Requires through-hole assembly; less suitable for high-density SMT layouts or automated reflow | Select when legacy through-hole compatibility or MIL-PRF-19500 screening is required |
| BZX55C18-TR | 18 V ±5%, DO-35 package, 500 mW rating; higher ZZT (1000 Ω), no radiation hardness documentation | Lacks hermetic seal and radiation qualification; limited to commercial-grade terrestrial applications | Choose for cost-sensitive consumer electronics where radiation or extreme temperature performance is not needed |
Compared with 1N5248BUR-1E3, the 1N5248B-1TR offers identical electrical specs but requires manual or wave-solder assembly, while BZX55C18-TR trades hermeticity and radiation hardness for lower unit cost in benign environments.
Availability
1N5248BUR-1E3 is available at Aetrix Electronics and suitable for industrial power supplies, avionics sensor interfaces, and downhole instrumentation requiring stable component supply with guaranteed RoHS compliance and traceable sourcing.
Supply support for 1N5248BUR-1E3 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) designs high-reliability semiconductor components for aerospace, defense, and industrial markets, emphasizing radiation tolerance and extended temperature operation.
The 1N52xxBUR-1 series was developed to deliver JEDEC-standard Zener regulation in hermetically sealed surface-mount packages for mission-critical analog reference applications demanding long-term stability and environmental resilience.
FAQ
What is the Zener voltage tolerance of the 1N5248BUR-1E3?
The 1N5248BUR-1E3 has a nominal Zener voltage of 18 V with a ±5% tolerance, corresponding to the "B" suffix in its nomenclature. This means the actual measured VZ at 7.0 mA test current falls between 17.1 V and 18.9 V at 25 °C, verified per Microsemi's electrical characteristics table.
Is the 1N5248BUR-1E3 RoHS compliant?
Yes, the "e3" suffix in 1N5248BUR-1E3 explicitly denotes RoHS compliance per EU Directive 2011/65/EU, with annealed matte-tin plating on both end caps. This version is qualified for commercial-grade use only and meets lead-free soldering requirements up to 260 °C for 10 seconds.
What is the maximum power dissipation for the 1N5248BUR-1E3?
The 1N5248BUR-1E3 has a steady-state power dissipation rating of 0.5 W, valid only when the end cap temperature remains below 125 °C or ambient temperature stays below 50 °C on FR4 board. Derating is required above those temperatures per Figure 2 in the datasheet.
Does the 1N5248BUR-1E3 have radiation hardness certification?
Yes, the 1N5248BUR-1E3 is inherently radiation hard per Microsemi MicroNote 050, which documents its performance under total ionizing dose (TID) exposure. This characteristic stems from its hermetic glass package and metallurgical bond structure-not an add-on qualification.
What package type does the 1N5248BUR-1E3 use?
The 1N5248BUR-1E3 uses the DO-213AA package, also known as SOD80 or MLL34, a metallurgically bonded glass MELF surface-mount case. Dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length, with cathode band marking for polarity identification.
1N5248BUR-1E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bag
- 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:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5248BUR-1E3 FAQ
1.How can I place an order for 1N5248BUR-1E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5248BUR-1E3 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-1E3 reliable?
The price and inventory of 1N5248BUR-1E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5248BUR-1E3 is usually 5 days.
3.What payment methods are accepted for 1N5248BUR-1E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5248BUR-1E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5248BUR-1E3?
1N5248BUR-1E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5248BUR-1E3 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-1E3?
For technical support, including 1N5248BUR-1E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5248BUR-1E3 requirements.
6.How does Aetrix verify that 1N5248BUR-1E3 is sourced from the original manufacturer or authorized distributors?
All 1N5248BUR-1E3 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-1E3 meets industry standards.
7.What is the process for return or replacement of 1N5248BUR-1E3?
All 1N5248BUR-1E3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5248BUR-1E3, 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-1E3 part is unused and in its original packaging.
Return procedure for 1N5248BUR-1E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5248BUR-1E3 Tags
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