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Microchip Technology 1N3051BUR-1
- Part No.:
- 1N3051BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3051BUR-1.pdf
- Description:
- DIODE ZENER 200V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,430
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Product details
Overview
1N3051BUR-1 from Microsemi is a surface-mount, hermetically sealed glass Zener diode in DO-213AB (MELF) package, rated for 1.5 W power dissipation at 25°C, with nominal Zener voltage of 200 V ±5% (suffix "B"), 1.2 V max forward voltage at 200 mA, and reverse leakage current ≤0.5 μA at rated VR. It delivers stable voltage regulation in high-reliability aerospace, defense, and industrial power supply circuits.
For engineers reviewing the 1N3051BUR-1 datasheet, 1N3051BUR-1 pinout, 1N3051BUR-1 application, or 1N3051BUR-1 equivalent, this page provides verified electrical specs, thermal derating behavior, MIL-qualified screening options (MX/MV prefixes), RoHS-compliant e3 variant availability, and DO-213AB footprint guidance per Microsemi's official documentation.
Technical Context
This device operates as a precision voltage reference and overvoltage clamp in DC power rails, leveraging its metallurgically enhanced internal contact construction to achieve low thermal resistance (40 °C/W junction-to-end-cap) and stable regulation across –65°C to +175°C. Its hermetic double-slug glass MELF package ensures radiation hardness and ESD insensitivity.
The 1N3051BUR-1 exhibits a typical Zener impedance of 1500 Ω at IZT = 1.2 mA and 8000 mA maximum Zener current (IZM), with capacitance characterized per Figure 2 and temperature coefficient αVZ = +0.100 %/°C - confirming positive TC behavior consistent with high-voltage Zener operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 200 V ±5% at IZT = 1.2 mA - defines precise clamping threshold for 200-V rail protection |
| Power Dissipation (PD) | 1.5 W at 25°C end-cap temperature - supports robust thermal margin in compact layouts |
| Zener Impedance (ZZT) | 1500 Ω at IZT - indicates moderate dynamic impedance suitable for stable regulation under varying load |
| Reverse Leakage Current (IR) | ≤0.5 μA at VR = 152 V - ensures minimal standby power loss in high-impedance bias networks |
| Operating Temperature | –65°C to +175°C - enables deployment in extended-environment avionics and downhole electronics |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - confirms low conduction loss during forward-biased transient suppression |
| Thermal Resistance | 40 °C/W junction-to-end-cap - allows accurate thermal modeling using end-cap temperature as proxy |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical, leadless, hermetically sealed; cathode indicated by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to system ground or lower-potential node during Zener regulation |
| Cathode | Banded end | Connected to regulated voltage rail; carries full Zener current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables radiation hardness and long-term reliability in space-grade and military applications |
| Metallurgically enhanced contact design | Reduces thermal resistance and improves surge current handling vs. standard DO-13 equivalents |
| RoHS-compliant e3 variant | Meets environmental compliance without performance trade-offs; tin-plated terminals solderable per MIL-STD-750 |
| MIL-PRF-19500/115 screening options | MQ/MX/MV prefixes enable JAN/JANTX/JANTXV qualification - critical for defense BOMs |
| Low reverse leakage (≤0.5 μA) | Minimizes quiescent current in high-impedance reference dividers and sensing circuits |
Applications
| Avionics Power Conditioning | Downhole Instrumentation |
|---|---|
Use Scenario: Regulating auxiliary 200-V DC bus in flight control actuator power supplies under wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and stabilize output voltage against transients and load variation. Use Value: Hermetic DO-213AB package withstands thermal cycling and vibration; 175°C max operating temperature avoids derating in enclosed enclosures. |
Use Scenario: Overvoltage protection for sensor front-ends exposed to 150–200 V excitation in oil/gas well logging tools. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing fault energy during cable discharge events. Use Value: 1.5 W rating and 8000 mA IZM allow safe dissipation of high-energy surges without degradation. |
| Spacecraft EPS Monitoring | Military Radar Bias Supplies |
Use Scenario: Precision voltage reference in radiation-tolerant telemetry conditioning circuits on LEO satellites. IC Role / Device Role / Timing Role: Stable Zener reference providing known voltage drop for ADC input scaling and fault detection thresholds. Use Value: Inherent radiation hardness (MicroNote 050) eliminates need for shielding or redundancy in TID-sensitive subsystems. |
Use Scenario: Clamping transient spikes on high-voltage bias rails feeding GaN RF amplifiers in ground-based radar transmitters. IC Role / Device Role / Timing Role: Fast-response shunt protector diverting ESD and switching-induced overshoot away from sensitive active devices. Use Value: Low 1.2 V forward voltage ensures rapid turn-on during negative transients; nonsensitive to ESD per spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3051B (DO-13 axial) | Same electrical specs but DO-13 thru-hole package; no surface-mount capability; higher parasitic inductance | Requires PCB through-holes and larger board area; unsuitable for high-density SMT assemblies | Select only when legacy thru-hole compatibility or manual repair access is required |
| MLL3051B | Identical electrical and mechanical specs; alternate Microsemi part number per Note 3; same DO-213AB package and e3 RoHS option | No functional difference; used interchangeably in procurement and qualification records | Preferred for sourcing consistency when referencing Microsemi's internal nomenclature |
Compared with 1N3051BUR-1, the 1N3051B offers identical Zener performance but lacks SMT compatibility and thermal efficiency, while MLL3051B is a direct naming variant with no design impact - making the former a layout-constrained alternative and the latter a documentation-equivalent option.
Availability
1N3051BUR-1 is available at Aetrix Electronics and suitable for avionics power conditioning, downhole instrumentation, spacecraft EPS monitoring, and military radar bias supplies requiring stable component supply, MIL-qualified traceability, and extended-temperature operation.
Supply support for 1N3051BUR-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 (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-temperature, and mission-critical components.
The 1N3051BUR-1 belongs to Microsemi's legacy glass Zener diode family engineered for high-density, high-reliability voltage regulation where hermetic sealing, MIL-qualified screening, and extended thermal range are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3051BUR-1?
The "B" suffix in 1N3051BUR-1 specifies a nominal Zener voltage tolerance of ±5% at 200 V, measured at IZT = 1.2 mA and 25°C. Tighter tolerances (e.g., ±2% with "C", ±1% with "D") are available via custom ordering but are not standard for this part number. The 1N3051BUR-1 datasheet confirms this tolerance applies across its full operating temperature range.
Is 1N3051BUR-1 RoHS compliant?
Yes, the standard 1N3051BUR-1 is RoHS compliant when ordered with the "e3" suffix (i.e., 1N3051BUR-1e3), indicating annealed matte-tin plating per MIL-STD-750, method 2026. The base part number without "e3" uses tin-lead plating; both versions share identical electrical and thermal specifications, and the e3 variant is fully compatible with lead-free reflow profiles up to 260°C for 10 seconds.
What is the maximum Zener current (IZM) for 1N3051BUR-1?
The maximum Zener current (IZM) for 1N3051BUR-1 is 8000 mA, specified at 25°C ambient with recommended FR4 footprint. This value reflects the peak DC current the device can sustain without exceeding its 1.5 W power limit at the junction. Derating applies above 25°C per Figure 1, and actual IZM depends on thermal management - the 1N3051BUR-1 achieves higher IZM than JEDEC 1N3051B due to improved thermal resistance.
Does 1N3051BUR-1 support MIL-qualified screening?
Yes, 1N3051BUR-1 supports MIL-PRF-19500/115 screening via prefix options: MX for JANTX, MV for JANTXV, and MQ for JAN. For example, MV1N3051BUR-1 meets JANTXV requirements including extended temperature testing, burn-in, and lot traceability. These variants retain identical electrical specs and DO-213AB packaging, and are documented in Microsemi's source control drawing (SCD) system.
What is the thermal resistance specification for 1N3051BUR-1?
The 1N3051BUR-1 has a junction-to-end-cap thermal resistance of 40 °C/W, measured under controlled conditions. When mounted on an FR4 board with 1 oz copper and Microsemi's recommended footprint, junction-to-ambient thermal resistance is 120 °C/W. This dual specification enables accurate thermal modeling: end-cap temperature (TEC) is the primary thermal metric, with 115°C max TEC defining the 1.5 W steady-state power limit.
1N3051BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 152 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3051BUR-1 FAQ
1.How can I place an order for 1N3051BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3051BUR-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 1N3051BUR-1 reliable?
The price and inventory of 1N3051BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3051BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N3051BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3051BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3051BUR-1?
1N3051BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3051BUR-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 1N3051BUR-1?
For technical support, including 1N3051BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3051BUR-1 requirements.
6.How does Aetrix verify that 1N3051BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N3051BUR-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 1N3051BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N3051BUR-1?
All 1N3051BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3051BUR-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 1N3051BUR-1 part is unused and in its original packaging.
Return procedure for 1N3051BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3051BUR-1 Tags
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