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Microchip Technology 1N5250BUR-1
- Part No.:
- 1N5250BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5250BUR-1.pdf
- Description:
- DIODE ZENER 20V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,373
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Product details
Overview
1N5250BUR-1 from Microsemi is a hermetically sealed, metallurgically bonded glass MELF Zener diode rated for 500 mW power dissipation, with a nominal Zener voltage of 20 V at 6.2 mA test current, ±5% tolerance (B suffix), and +0.086 %/°C temperature coefficient. It operates across –65 °C to +175 °C and serves as a precision voltage reference or shunt regulator in low-power analog circuits.
For engineers reviewing the 1N5250BUR-1 datasheet, 1N5250BUR-1 pinout, 1N5250BUR-1 application, or 1N5250BUR-1 equivalent, this part is selected for stable low-current regulation where minimal capacitance (<1 pF typical), radiation hardness, and MIL-PRF-19500 up-screening capability are required - especially in aerospace, instrumentation, and high-reliability industrial power supplies.
Technical Context
This device functions as a two-terminal shunt voltage regulator operating in reverse breakdown. Its Zener voltage is specified at IZT = 6.2 mA, with dynamic impedance ZZT = 25 Ω and maximum reverse leakage IR = 0.1 µA at VR = 15 V. The DO-213AA (SOD80/MLL34) package enables surface-mount reliability without axial leads.
Thermal performance is defined by RθJA = 250 °C/W on FR4 (1 oz Cu) and RθJEC = 100 °C/W to end cap. Derating begins above TA = 50 °C or TEC = 125 °C, limiting usable power to maintain junction temperature within –65 °C to +175 °C limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 20 V ±5% at 6.2 mA - defines precise regulation point for feedback or reference circuits |
| Power Dissipation PD | 0.5 W - supports continuous operation up to 6.2 mA at 20 V without forced cooling |
| Zener Impedance ZZT | 25 Ω at IZT - ensures stable output under small-signal load variations |
| Reverse Leakage IR | ≤0.1 µA at 15 V - guarantees negligible error current in high-impedance reference nodes |
| Temp. Coefficient αVZ | +0.086 %/°C - enables predictable drift compensation in wide-temperature designs |
| Junction Temp. Range | –65 °C to +175 °C - qualified for extreme-environment applications including downhole and avionics |
| Package | DO-213AA (SOD80/MLL34) - hermetic MELF glass body with cathode band marking and tin-lead or RoHS-compliant plating |
Pinout & Package
DO-213AA (SOD80/MLL34) is a cylindrical metallurgically bonded glass MELF package with two end-cap terminals. Cathode is marked by a single dark band; polarity must be observed during PCB placement - cathode side connects to higher potential for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; reverse-biased to establish 20 V reference |
| Anode (unbanded end) | Reference ground/reference return | Typically tied to system ground or feedback node; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bonding | Ensures robust thermal and mechanical interface between silicon die and end caps for reliable 175 °C operation |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-grade and nuclear instrumentation |
| MIL-PRF-19500 up-screening option | Enables qualification to military screening levels (JAN/JANTX/JANTXV/JANS) via suffix coding |
| Low capacitance | Typical <1 pF - preserves high-frequency stability in RF bias networks and fast-switching references |
Applications
| High-Voltage Reference Supply | Aerospace Power Monitoring |
|---|---|
Use Scenario: Generating a stable 20 V reference for ADC biasing or op-amp level-shifting in isolated DC-DC converter feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 20 V node independent of input ripple or load transients. Use Value: Delivers ±5% accuracy over –65 °C to +125 °C with <0.1 µA leakage, minimizing gain error in precision measurement front-ends. |
Use Scenario: Monitoring bus voltage in satellite power distribution units where radiation exposure and thermal cycling exceed commercial limits. IC Role / Device Role / Timing Role: Zener clamp protecting monitoring IC inputs against overvoltage while surviving total ionizing dose >100 krad(Si). Use Value: Maintains regulation integrity after radiation exposure due to inherent hardness and hermetic sealing - no parameter shift observed per MicroNote 050. |
| Industrial Sensor Excitation | Medical Instrument Calibration |
Use Scenario: Providing excitation voltage to strain-gauge bridges in factory-floor load cells operating near 85 °C ambient. IC Role / Device Role / Timing Role: Low-drift 20 V source enabling ratiometric measurement with matched thermal coefficients. Use Value: +0.086 %/°C tempco aligns closely with bridge resistor drift, reducing net system error to <0.02%/°C over full range. |
Use Scenario: Calibrating portable ECG amplifier gain stages requiring traceable, stable reference under battery-powered, unregulated conditions. IC Role / Device Role / Timing Role: Primary shunt reference in auto-calibration circuitry that activates during standby mode. Use Value: 0.1 µA max leakage prevents loading of high-Z calibration DAC outputs, preserving 16-bit linearity during self-test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5250B-1 | Same electrical specs but in DO-35 (axial-leaded) package; no MELF geometry or hermetic seal | Limited to non-vibration, non-high-reliability PCBs; unsuitable for automated SMT assembly or harsh environments | Select only when through-hole prototyping or legacy board rework is required |
| BZX55C20 | 20 V, ±5%, 500 mW in DO-35; higher ZZT (30 Ω), wider tempco (±0.09 %/°C), non-hermetic epoxy package | Not radiation-hardened; leakage up to 0.5 µA at 15 V; not MIL-qualified | Acceptable for cost-sensitive commercial instruments where radiation and long-term stability are not critical |
Compared with 1N5250B-1 and BZX55C20, the 1N5250BUR-1 delivers superior thermal stability, hermetic reliability, and radiation tolerance - making it the only choice for aerospace, downhole, or medical safety-critical voltage referencing where field failure is unacceptable.
Availability
1N5250BUR-1 is available at Aetrix Electronics and suitable for aerospace power monitoring, industrial sensor excitation, and medical instrument calibration requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N5250BUR-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, radiation-hardened, and defense-grade analog and mixed-signal components.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered specifically for mission-critical applications demanding hermetic packaging, MIL-PRF-19500 compliance, and proven radiation hardness - not general-purpose voltage clamping.
FAQ
What is the Zener voltage tolerance and test current for 1N5250BUR-1?
The 1N5250BUR-1 has a nominal Zener voltage of 20 V with ±5% tolerance (B grade), measured at a test current IZT of 6.2 mA. This tolerance is guaranteed across the full operating temperature range of –65 °C to +175 °C when used within its power derating limits.
Is 1N5250BUR-1 suitable for surface-mount assembly using standard reflow profiles?
Yes, the 1N5250BUR-1 in DO-213AA package is qualified for lead-free reflow with peak solder temperature up to 260 °C for 10 seconds. Its metallurgically bonded glass construction withstands thermal shock better than epoxy-packaged Zeners, supporting high-yield SMT manufacturing.
Does 1N5250BUR-1 meet MIL-PRF-19500 requirements out of the box?
No - the base 1N5250BUR-1 is a commercial-grade part. However, Microsemi offers up-screened versions (e.g., JAN1N5250-1, JANTX1N5250-1) compliant with MIL-PRF-19500, identifiable by MQ/MX/MV/MSP prefixes. These require separate ordering and qualification testing.
What is the maximum reverse leakage current for 1N5250BUR-1 at 15 V?
The 1N5250BUR-1 exhibits a maximum reverse leakage current IR of 0.1 µA when biased at VR = 15 V and TA = 25 °C. This ultra-low leakage ensures minimal error contribution in high-impedance reference circuits such as those used in precision data acquisition systems.
Can 1N5250BUR-1 be used in place of 1N5250B-1 without layout changes?
No - although both share identical electrical specifications, the 1N5250BUR-1 uses a DO-213AA (SOD80) MELF package, while 1N5250B-1 uses DO-35 axial leads. Their footprints, mounting methods, and thermal paths differ fundamentally; PCB redesign is required for substitution.
1N5250BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 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
1N5250BUR-1 FAQ
1.How can I place an order for 1N5250BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5250BUR-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 1N5250BUR-1 reliable?
The price and inventory of 1N5250BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5250BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5250BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5250BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5250BUR-1?
1N5250BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5250BUR-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 1N5250BUR-1?
For technical support, including 1N5250BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5250BUR-1 requirements.
6.How does Aetrix verify that 1N5250BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5250BUR-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 1N5250BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5250BUR-1?
All 1N5250BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5250BUR-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 1N5250BUR-1 part is unused and in its original packaging.
Return procedure for 1N5250BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5250BUR-1 Tags
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