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Microchip Technology 1N992BUR-1/TR
- Part No.:
- 1N992BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N992BUR-1/TR.pdf
- Description:
- DIODE ZENER 200V 400MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:80
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Product details
Overview
1N992BUR-1 from Microsemi is a silicon MELF surface-mount Zener diode rated for 200 V nominal Zener voltage, ±5% tolerance, 500 mW steady-state power dissipation at TEC = +125°C, and qualified per MIL-PRF-19500/117 (JANTXV level). It regulates voltage in precision reference and overvoltage protection circuits across industrial power supplies and aerospace avionics.
For engineers reviewing the 1N992BUR-1 datasheet, 1N992BUR-1 pinout, 1N992BUR-1 application, or 1N992BUR-1 equivalent, key selection criteria include its 200 V Zener voltage, 0.65 mA Zener test current (IZT), 8000 Ω dynamic impedance (ZZT), -65°C to +175°C operating temperature range, and DO-213AA glass MELF package with cathode band polarity marking.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with Zener voltage specified at IZT = 0.65 mA and dynamic impedance measured at 10% AC modulation of IZT. Its hermetically sealed glass case and internal metallurgical bond ensure stable regulation under thermal cycling and radiation exposure.
The 1N992BUR-1 exhibits a positive temperature coefficient of +0.110 %/°C and maximum reverse leakage of 0.5 µA at VR = 152 V. Thermal resistance junction-to-end cap is 100 °C/W, enabling reliable operation up to +175°C junction temperature when properly heat-sunk via end-cap mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 200 V at IZT = 0.65 mA - defines precise regulation point for high-voltage reference design |
| Power Dissipation (PD) | 0.5 W @ TEC = +125°C - sets maximum continuous DC power handling with end-cap thermal path |
| Zener Impedance (ZZT) | 8000 Ω @ IZT - indicates high impedance limiting regulation accuracy at low currents |
| Reverse Leakage (IR) | 0.5 µA @ VR = 152 V - ensures minimal parasitic current in standby or sensing paths |
| Operating Temperature | -65°C to +175°C - supports deployment in extreme-environment military and aerospace systems |
| Package | DO-213AA glass MELF - enables high-density SMT placement with hermetic reliability and no lead inductance |
| Temperature Coefficient | +0.110 %/°C - quantifies voltage drift per degree, critical for temperature-stable references |
Pinout & Package
DO-213AA glass MELF package: cylindrical hermetically sealed glass body with tin/lead or RoHS-compliant matte-tin plated copper-clad steel terminals; cathode identified by a single dark band on the glass envelope; no discrete pins - terminals are axial ends of the cylinder.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower potential in shunt regulator configuration |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Provides stable 200 V reference when reverse-biased; must be connected to higher potential |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/117 JANTXV qualification | Validated reliability for mission-critical aerospace and defense applications with full screening and traceability |
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation, ensuring long-term parameter stability |
| Internal metallurgical bond | Reduces thermal resistance and improves transient surge robustness versus soldered die attach |
| Non-ESD-sensitive per MIL-STD-750 Method 1020 | Enables safe handling without special ESD controls during assembly and test |
| Minimal capacitance | Supports high-frequency noise filtering and fast transient response in protection circuits |
Applications
| High-Voltage Power Supply Reference | Aerospace Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback node in 200 V DC-DC converter output stage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 200 V setpoint for error amplifier comparison. Use Value: Maintains ±5% regulation across -65°C to +125°C ambient with <0.5 µA leakage minimizing load error. | Use Scenario: Clamping transients on 28 V aircraft bus during load dump events. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy above 200 V threshold. Use Value: Withstands 8000 Ω ZZT and 250 mA IZM, limiting clamped voltage to ≤200 V + (Isurge × 8 kΩ) during surges. |
| Radiation-Hardened Sensor Biasing | Test Equipment High-Voltage Calibration |
Use Scenario: Providing stable bias voltage for ionization chamber detectors in nuclear instrumentation. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference maintaining accuracy after total ionizing dose exposure. Use Value: Inherent radiation hardness per Microsemi MicroNote 050 enables >100 krad(Si) operation without parameter shift. | Use Scenario: Calibrating 200 V range on portable multimeters and benchtop power analyzers. IC Role / Device Role / Timing Role: Primary voltage standard traceable to MIL-qualified production lot. Use Value: ±5% tolerance and JANTXV qualification support metrology-grade calibration confidence and audit compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N992B-1 | Axial DO-35 package; same electrical specs but non-surface-mount; no MIL qualification | Suitable for through-hole prototyping or legacy board repair where MELF footprint unavailable | Select 1N992B-1 only if manual assembly or wave soldering is required and space constraints allow axial leads. |
| SMF200A | Surface-mount SOD-123 package; 200 V standoff; 1 kW peak pulse power; not a Zener regulator | Designed for transient suppression, not precision DC regulation; higher clamping voltage than VZ | Choose SMF200A for surge-only protection; avoid for reference use due to lack of tight VZ tolerance and regulation capability. |
Compared with 1N992B-1 and SMF200A, the 1N992BUR-1 uniquely combines MIL-qualified surface-mount packaging, precise 200 V Zener regulation, and hermetic reliability-making it irreplaceable in high-reliability SMT designs requiring traceable voltage reference performance.
Availability
1N992BUR-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, radiation-hardened instrumentation, and high-reliability industrial control systems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N992BUR-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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N992BUR-1 belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered for precision voltage regulation in harsh-environment applications where parameter stability, radiation tolerance, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N992BUR-1?
The 1N992BUR-1 has a nominal Zener voltage of 200 V with a ±5% tolerance, indicated by the "B" suffix in its part number per JEDEC nomenclature. This tolerance applies across the full operating temperature range of -65°C to +175°C and is verified under MIL-PRF-19500/117 JANTXV screening.
Is the 1N992BUR-1 suitable for surface-mount assembly?
Yes, the 1N992BUR-1 uses the DO-213AA glass MELF package designed specifically for surface-mount reflow soldering. It supports standard SMT processes including peak temperatures up to 260°C for 10 seconds and complies with RoHS (e3 marking) for commercial versions.
What is the maximum Zener test current (IZT) for the 1N992BUR-1?
The 1N992BUR-1 is characterized at a Zener test current of 0.65 mA, as specified in Microsemi's T4-LDS-0287-1 datasheet. This current establishes the 200 V Zener voltage measurement point and is used to calculate dynamic impedance (ZZT = 8000 Ω).
Does the 1N992BUR-1 have radiation hardness certification?
Yes, the 1N992BUR-1 exhibits inherent radiation hardness documented in Microsemi MicroNote 050. As a JANTXV-qualified device per MIL-PRF-19500/117, it is validated for operation in radiation environments typical of space and nuclear applications without parameter degradation.
How is polarity marked on the 1N992BUR-1 package?
The 1N992BUR-1 uses a single dark band on the glass MELF body to identify the cathode terminal. The unbanded end is the anode. This marking is consistent across all DO-213AA MELF Zeners in the 1N957BUR-1 to 1N992BUR-1 series and is visible post-soldering.
1N992BUR-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):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 2500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 152 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N992BUR-1/TR FAQ
1.How can I place an order for 1N992BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N992BUR-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 1N992BUR-1/TR reliable?
The price and inventory of 1N992BUR-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 1N992BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N992BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N992BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N992BUR-1/TR?
1N992BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N992BUR-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 1N992BUR-1/TR?
For technical support, including 1N992BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N992BUR-1/TR requirements.
6.How does Aetrix verify that 1N992BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N992BUR-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 1N992BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N992BUR-1/TR?
All 1N992BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N992BUR-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 1N992BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N992BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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