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Microchip Technology 1N5237BUR-1/TR
- Part No.:
- 1N5237BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5237BUR-1/TR.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,537
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Product details
Overview
1N5237BUR-1/TR from Microsemi is a surface-mount 8.2 V, 500 mW Zener diode in DO-213AA (SOD-80) glass MELF package with ±5% tolerance, 8 Ω dynamic impedance at 20 mA, and -65 °C to +175 °C operating temperature range-used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5237BUR-1/TR datasheet, 1N5237BUR-1/TR pinout, 1N5237BUR-1/TR application, or 1N5237BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, hermetic glass packaging for stability, thermal resistance (250 °C/W), and RoHS-compliant commercial-grade availability with tape-and-reel delivery.
Technical Context
This device operates as a reverse-biased voltage reference diode, maintaining stable 8.2 V regulation across 0.25 mA to 20 mA test current range. Its metallurgically bonded glass construction ensures low leakage (<3 µA at 6.2 V), minimal capacitance (~3 pF), and inherent radiation hardness per MicroNote 050.
The 1N5237BUR-1/TR exhibits a positive temperature coefficient of +0.062 %/°C, enabling predictable drift compensation in temperature-sensitive references. It is rated for 0.5 W steady-state dissipation at end-cap temperature <125 °C or ambient <50 °C on FR4 board with specified footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.2 V at 20 mA - precise regulation point for feedback networks and analog references. |
| Power Dissipation PD | 0.5 W - supports compact layout without forced cooling in low-power supplies. |
| Dynamic Impedance ZZT | 8 Ω at IZT = 20 mA - ensures tight voltage regulation under varying load conditions. |
| Reverse Leakage IR | ≤3 µA at VR = 6.2 V - minimizes error current in high-impedance reference paths. |
| Temp. Coefficient αVZ | +0.062 %/°C - enables predictable thermal drift modeling in precision circuits. |
| Junction Temp. Range | -65 °C to +175 °C - suitable for extended industrial and aerospace environments. |
| Package | DO-213AA (SOD-80) - hermetically sealed glass MELF for moisture resistance and long-term stability. |
Pinout & Package
DO-213AA (SOD-80) metallurgically bonded glass MELF package with cathode band marking; terminals are solderable end caps with tin-lead or RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher potential in Zener mode; defines polarity for regulation. |
| Anode (unbanded end) | Reference ground node | Common return path; reverse bias applied between cathode and anode. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments. |
| Metallurgical bonding | Ensures mechanical robustness and thermal stability under thermal cycling. |
| Low capacitance (~3 pF) | Preserves high-frequency response in RF biasing and fast-switching regulator feedback. |
| ESD insensitivity (MIL-STD-750 Method 1020) | Enables handling without special ESD controls during assembly and testing. |
| Radiation hardness (MicroNote 050) | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si). |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference providing stable 8.2 V threshold for TL431-type shunt regulators or discrete error amplifiers. Use Value: Low 8 Ω dynamic impedance maintains regulation accuracy despite load transients and line variations. | Use Scenario: Supplies stable excitation voltage to bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric ADC front-end biasing. Use Value: ±5% tolerance and +0.062 %/°C TC enable <0.1% full-scale error over -40 °C to +85 °C operating range. |
| Automotive Engine Control Unit (ECU) Biasing | Avionics Voltage Monitor Threshold |
Use Scenario: Generates fixed bias for analog comparators monitoring battery voltage or rail integrity in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Overvoltage/undervoltage detection reference in discrete protection circuitry. Use Value: -65 °C to +175 °C junction rating supports under-hood deployment without derating. | Use Scenario: Sets trip threshold for redundant voltage monitors in flight control power distribution units. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference ensuring fault detection reliability in high-altitude operation. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for additional shielding or screening. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5237B-1/TR | Same 8.2 V, ±5% spec, but in axial DO-35 (DO-204AH) package - no MELF geometry or hermetic seal. | Lacks radiation hardness and moisture resistance; unsuitable for aerospace or sealed enclosures. | Select only when through-hole mounting and lower reliability requirements apply. |
| BZX55C8V2-TR | 8.2 V, ±5%, 500 mW, but in DO-35 plastic package - higher leakage (≤5 µA), no radiation qualification. | Not rated for MIL-PRF-19500 up-screening; limited to commercial-grade industrial use. | Prefer for cost-sensitive consumer applications where hermeticity and radiation tolerance are unnecessary. |
Compared with 1N5237B-1/TR and BZX55C8V2-TR, the 1N5237BUR-1/TR uniquely combines hermetic glass MELF packaging, metallurgical bonding, radiation hardness, and MIL-PRF-19500 up-screening capability-making it the sole choice for high-reliability, high-stability Zener reference applications requiring long-term parametric stability.
Availability
1N5237BUR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive ECUs, and avionics voltage monitors requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5237BUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was developed to deliver JEDEC-standard Zener regulation in hermetic surface-mount form, targeting applications demanding long-term stability, radiation tolerance, and extended temperature operation.
FAQ
What is the Zener voltage and tolerance of the 1N5237BUR-1/TR?
The 1N5237BUR-1/TR has a nominal Zener voltage of 8.2 V at 20 mA test current with a tolerance of ±5%, as indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance is guaranteed across the full operating temperature range of -65 °C to +175 °C, and the device meets JEDEC 1N5237 specifications in DO-213AA packaging.
What package type does the 1N5237BUR-1/TR use, and why is it significant?
The 1N5237BUR-1/TR uses the DO-213AA (SOD-80) metallurgically bonded glass MELF package. This hermetic construction prevents moisture ingress, ensures long-term parameter stability, and supports radiation hardness per MicroNote 050-critical for aerospace, defense, and high-reliability industrial applications where plastic or non-hermetic packages would degrade.
Does the 1N5237BUR-1/TR have radiation hardness certification?
Yes, the 1N5237BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, which documents its performance under total ionizing dose (TID) exposure. This characteristic stems from its metallurgically bonded glass structure and is not dependent on external screening-it applies directly to the 1N5237BUR-1/TR as shipped.
What is the maximum reverse leakage current for the 1N5237BUR-1/TR, and at what condition?
The 1N5237BUR-1/TR has a maximum reverse leakage current of 3 µA at a reverse voltage (VR) of 6.2 V and ambient temperature of 25 °C. This low leakage supports high-impedance reference designs and minimizes error in precision analog circuits where bias current must be tightly controlled.
Is the 1N5237BUR-1/TR RoHS compliant, and how is compliance indicated?
Yes, the 1N5237BUR-1/TR is RoHS compliant in its commercial-grade version, indicated by the "e3" suffix in the full part marking (e.g., 1N5237BUR-1(e3)/TR). RoHS compliance applies only to commercial-grade units; military-qualified versions (e.g., JANTXV) retain leaded terminations per specification.
1N5237BUR-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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6.5 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
1N5237BUR-1/TR FAQ
1.How can I place an order for 1N5237BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5237BUR-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 1N5237BUR-1/TR reliable?
The price and inventory of 1N5237BUR-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 1N5237BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5237BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5237BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5237BUR-1/TR?
1N5237BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5237BUR-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 1N5237BUR-1/TR?
For technical support, including 1N5237BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5237BUR-1/TR requirements.
6.How does Aetrix verify that 1N5237BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5237BUR-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 1N5237BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5237BUR-1/TR?
All 1N5237BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5237BUR-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 1N5237BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5237BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5237BUR-1/TR Tags
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MM5Z5V1ST1G
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