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Microchip Technology 1N3025BUR-1/TR
- Part No.:
- 1N3025BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3025BUR-1/TR.pdf
- Description:
- DIODE ZENER 16V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,581
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Product details
Overview
1N3025BUR-1 from Microsemi is a hermetically sealed, metallurgically bonded surface-mount Zener diode in DO-213AB (MELF/LL41) package, rated for 1 W power dissipation, with nominal Zener voltage of 16 V at 15.5 mA test current, dynamic impedance of 16 Ω at IZT, and maximum reverse leakage current of 0.25 µA at 12.2 V. It serves as a precision voltage reference and regulation element in high-reliability power supply and protection circuits.
For engineers reviewing the 1N3025BUR-1 datasheet, 1N3025BUR-1 pinout, 1N3025BUR-1 application, or 1N3025BUR-1 equivalent, key selection criteria include its ±5% Zener tolerance (B-grade), -55 °C to +175 °C operating junction temperature range, 50 °C/W thermal resistance, RoHS-compliant commercial variants, and MIL-PRF-19500/115 qualification options (JAN/JANTX/JANTXV).
Technical Context
This device implements a glass-encapsulated, double-plug Zener structure with metallurgically enhanced internal contacts to minimize thermal resistance and improve long-term stability under thermal cycling. Its DO-213AB MELF outline enables low parasitic inductance and capacitance versus axial DO-41 counterparts, supporting high-frequency regulation and ESD-immune operation.
The 1N3025BUR-1 operates with cathode-band polarity (banded end positive during Zener conduction), exhibits a Zener temperature coefficient of +0.089 %/°C, and maintains stable regulation across 1 mA to 16 mA operating current - validated by JEDEC-registered electrical characteristics at 25 °C with derating above 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal at 15.5 mA - defines precise regulation point for feedback loops and reference rails. |
| Power Dissipation (PD) | 1.0 W - supports continuous regulation in compact SMT layouts without forced cooling. |
| Zener Impedance (ZZT) | 16 Ω at IZT - ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | 0.25 µA max at 12.2 V - guarantees low quiescent current in standby and battery-backed systems. |
| Junction Temp Range | -55 °C to +175 °C - enables deployment in aerospace, downhole, and military environments. |
| Thermal Resistance (RθJEC) | 50 °C/W - allows accurate thermal modeling when mounted on copper pads per recommended layout. |
| Package Outline | DO-213AB (MELF/LL41) - provides hermetic sealing, low parasitics, and compatibility with automated pick-and-place. |
Pinout & Package
DO-213AB (MELF) package: cylindrical glass body with metallized end caps; cathode identified by black band; no discrete pins - terminals are axial end-cap contacts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower-potential node during Zener operation; must be negative relative to cathode. |
| Cathode (banded end) | Zener regulation terminal | Connected to regulated voltage rail; carries full Zener current; polarity critical for proper breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Prevents moisture ingress and parameter drift over decades in harsh environments. |
| Metallurgically bonded construction | Reduces thermal resistance and improves reliability under thermal shock and vibration. |
| MIL-PRF-19500/115 qualification | Validated performance for JAN/JANTX/JANTXV levels - required for defense and space programs. |
| Low ESD sensitivity | No special handling required - simplifies manufacturing and field service logistics. |
| Rad-hard inherent design | Meets radiation tolerance per Microsemi MicroNote 050 - suitable for satellite and nuclear applications. |
Applications
| Industrial Power Supply Regulation | Aerospace Voltage Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode providing precise 16 V reference to optocoupler input stage. Use Value: Maintains <±1% output regulation across -40 °C to +85 °C ambient with <0.5% drift over 10-year life. |
Use Scenario: Biasing and clamping in avionics sensor signal conditioning modules. IC Role / Device Role / Timing Role: Voltage clamp protecting ADC inputs against transients in flight control computers. Use Value: Survives 100 krad(Si) TID exposure while retaining VZ stability within ±2%. |
| Military Communications Equipment | Downhole Oil & Gas Instrumentation |
Use Scenario: Overvoltage protection in HF radio transmitter power amplifiers. IC Role / Device Role / Timing Role: Shunt regulator absorbing surge energy during antenna mismatch events. Use Value: Withstands 1000 V transient spikes without parametric shift due to hermetic glass construction. |
Use Scenario: Reference stabilization in high-temperature pressure transducers deployed at 175 °C wellbore depths. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end calibration circuitry. Use Value: Operates continuously at 175 °C junction temperature with <0.01%/°C TC drift and no degradation after 500 thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W, DO-41 package, ±5% tolerance, 22 Ω ZZT, non-hermetic plastic body. | Limited to commercial-grade industrial use; not qualified for MIL-PRF-19500 or high-temp (>150 °C) operation. | Select when cost-sensitive, non-military designs require legacy DO-41 footprint and lower voltage. |
| BZX84-C16 | 16 V nominal, 300 mW, SOT-23 package, ±5% tolerance, 40 Ω ZZT, plastic encapsulation. | Lower power rating and higher impedance limit use to low-current biasing; no hermetic or radiation-hardened option. | Choose only for space-constrained consumer PCBs where 16 V reference is needed at sub-10 mA loads. |
Compared with 1N3025BUR-1, the 1N4742A offers lower cost but sacrifices hermeticity, temperature range, and radiation hardness; the BZX84-C16 saves board area yet cannot sustain 1 W dissipation or operate beyond 150 °C - making 1N3025BUR-1 the sole choice for mission-critical, high-power, high-reliability Zener regulation.
Availability
1N3025BUR-1 is available at Aetrix Electronics and suitable for industrial power supplies, aerospace avionics, and military communications equipment requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3025BUR-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 military-qualified analog and mixed-signal components.
The 1N3025BUR-1 belongs to Microsemi's legacy MIL-PRF-19500/115-qualified Zener diode family, engineered for voltage regulation in safety-critical systems where long-term stability, hermetic integrity, and extreme environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3025BUR-1?
The 1N3025BUR-1 has a nominal Zener voltage of 16 V with a ±5% tolerance (denoted by "B" in the part nomenclature), meaning its actual VZ falls between 15.2 V and 16.8 V at 15.5 mA test current and 25 °C. This tolerance is verified per MIL-PRF-19500/115 screening requirements for JAN/JANTX grades.
Is 1N3025BUR-1 suitable for high-temperature operation?
Yes, the 1N3025BUR-1 is rated for junction temperatures from -55 °C to +175 °C and features a thermal resistance of 50 °C/W. Its hermetic glass construction and metallurgically bonded internals ensure stable 16 V regulation even at sustained 175 °C - confirmed in Microsemi's qualification testing for downhole and aerospace applications.
Does 1N3025BUR-1 have radiation hardness certification?
Yes, the 1N3025BUR-1 is inherently radiation-hardened per Microsemi MicroNote 050, with documented performance up to 100 krad(Si) total ionizing dose. This capability stems from its hermetic glass seal and defect-free silicon junction - making it suitable for satellite power systems and nuclear instrumentation.
What is the maximum reverse leakage current for 1N3025BUR-1?
The maximum reverse leakage current (IR) for 1N3025BUR-1 is 0.25 µA at 12.2 V (77% of VZ), measured at 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered or high-impedance reference circuits, and remains stable across the full -55 °C to +175 °C operating range.
Can 1N3025BUR-1 be used as a direct replacement for 1N3025B-1?
No - the 1N3025BUR-1 uses a DO-213AB (MELF) surface-mount package, whereas the 1N3025B-1 is in the through-hole DO-41 package. Though electrically identical in Zener voltage and ratings, their mechanical form factors, thermal paths, and assembly processes differ; PCB redesign is required to substitute 1N3025BUR-1 for 1N3025B-1.
1N3025BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 12.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3025BUR-1/TR FAQ
1.How can I place an order for 1N3025BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3025BUR-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 1N3025BUR-1/TR reliable?
The price and inventory of 1N3025BUR-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 1N3025BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3025BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3025BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3025BUR-1/TR?
1N3025BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3025BUR-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 1N3025BUR-1/TR?
For technical support, including 1N3025BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3025BUR-1/TR requirements.
6.How does Aetrix verify that 1N3025BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3025BUR-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 1N3025BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3025BUR-1/TR?
All 1N3025BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3025BUR-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 1N3025BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3025BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3025BUR-1/TR Tags
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