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Microchip Technology 1N6012UR-1/TR
- Part No.:
- 1N6012UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6012UR-1/TR.pdf
- Description:
- DIODE ZENER 33V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,934
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Product details
Overview
1N6012UR-1/TR from Microsemi is a surface-mount 33 V, 500 mW Zener diode in DO-213AA (MLL34/SOD80) MELF glass package with ±5% voltage tolerance, 110 mA maximum Zener current, and 700 Ω dynamic impedance at 5 mA test current - used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N6012UR-1/TR datasheet, 1N6012UR-1/TR pinout, 1N6012UR-1/TR application, or 1N6012UR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (300 °C/W junction-to-ambient), low leakage (<0.1 µA at 25 V), RoHS-compliant matte-tin plating, and MIL-PRF-19500 screening compatibility.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal 33 V breakdown at 5 mA (IZT), exhibiting +0.094 %/°C temperature coefficient and 700 Ω dynamic impedance (ZZT) under standard test conditions. Its glass-encapsulated DO-213AA construction provides hermetic sealing and inherent radiation hardness per MicroNote 050.
Designed for stable regulation across -65 °C to +175 °C junction temperature range, it delivers 500 mW power dissipation at 25 °C ambient on FR4 board with 1 oz copper, derating linearly above 25 °C per Figure 1. Cathode polarity is marked by a single band, requiring banded end to be positive during Zener operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at 5 mA - sets precise regulation point for feedback networks |
| Power Dissipation (PD) | 0.5 W at 25 °C ambient - defines max continuous power before thermal shutdown |
| Zener Impedance (ZZT) | 700 Ω at 5 mA - determines output voltage stability under load transients |
| Reverse Leakage (IR) | <0.1 µA at 25 V - ensures minimal quiescent current in high-impedance bias networks |
| Junction Temp Range | -65 °C to +175 °C - supports operation in aerospace, industrial, and downhole environments |
| Thermal Resistance (RθJA) | 300 °C/W - requires PCB copper area planning for thermal management on FR4 |
| Package | DO-213AA (MLL34/SOD80) MELF - enables automated placement and high-reliability hermetic sealing |
Pinout & Package
DO-213AA (MLL34/SOD80) is a cylindrical glass MELF package with two metallized end caps; polarity is indicated by a single cathode band - the banded end serves as the anode when operated in forward bias but functions as the cathode (positive terminal) during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode return path | Connected to circuit ground or lower potential node during regulation |
| Cathode (banded end) | Zener regulation terminal / voltage reference output | Connected to regulated rail or error amplifier input; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| MIL-PRF-19500 screening option | Enables use in military/aerospace applications requiring extended reliability testing |
| RoHS-compliant matte-tin plating | Supports lead-free reflow soldering without compromising solder joint integrity |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling in high-frequency reference or timing circuits |
| Radiation-hardened design | Validated per MicroNote 050 for TID tolerance up to 100 krad(Si), suitable for space-grade systems |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference diode providing stable 33 V threshold for TL431-like shunt regulator control. Use Value: Maintains ±1% output accuracy over -40 °C to +125 °C ambient with <0.1 µA leakage minimizing bias error. | Use Scenario: Supplies precision bias voltage to bridge-based pressure/temperature transducers in factory automation nodes. IC Role / Device Role / Timing Role: Stable voltage reference source for ratiometric ADC excitation and offset calibration. Use Value: 33 V Zener voltage enables direct scaling of 0–10 V sensor outputs while rejecting supply ripple via low dynamic impedance. |
| Aerospace Power Conditioning | Test Equipment Calibration |
Use Scenario: Provides fault-tolerant voltage clamp in satellite DC-DC converter overvoltage protection circuits. IC Role / Device Role / Timing Role: Primary Zener clamp protecting downstream regulators against transient surges up to 40 V. Use Value: Hermetic DO-213AA package and radiation hardness ensure reliability in LEO missions per MIL-PRF-19500 screening levels. | Use Scenario: Serves as traceable reference in benchtop multimeter and oscilloscope internal calibration subsystems. IC Role / Device Role / Timing Role: Precision voltage standard for self-test and auto-zero routines in metrology-grade instruments. Use Value: ±5% tolerance and +0.094 %/°C TC enable sub-0.1% absolute accuracy after system-level compensation at 25 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C33 | Same 33 V, ±5%, but in DO-35 axial package; higher RθJA (500 °C/W); no MIL screening option | Limited to non-military commercial PCBs with through-hole assembly; unsuitable for high-density SMT layouts | Select when axial mounting is required and radiation hardness is not needed |
| MMBZ5255BLT1G | 33 V, ±5%, SOT-23 package; lower PD (225 mW); higher ZZT (1000 Ω); RoHS only | Not rated for >125 °C operation; lacks MIL-PRF-19500 qualification; unsuitable for high-temp industrial use | Select for cost-sensitive consumer designs where power and temperature margins are relaxed |
Compared with BZX55C33 and MMBZ5255BLT1G, the 1N6012UR-1/TR offers superior thermal performance (300 °C/W vs. 500/400 °C/W), wider temperature range (-65 °C to +175 °C), and qualification path to MIL-PRF-19500 - making it the only choice for high-reliability SMT voltage reference applications demanding hermeticity and radiation tolerance.
Availability
1N6012UR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, aerospace power conditioning, and test equipment calibration requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N6012UR-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) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N6012UR-1/TR belongs to Microsemi's legacy DO-213AA Zener diode family, engineered for precision voltage regulation in mission-critical systems where hermetic packaging, radiation tolerance, and MIL-qualified reliability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for the 1N6012UR-1/TR?
The 1N6012UR-1/TR has a nominal Zener voltage of 33 V with ±5% tolerance, measured at a test current (IZT) of 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0228-1 Rev. 1, where the "B" suffix denotes 5% tolerance and IZT is explicitly listed as 5.0 mA for all 1N6009BUR–1N6031BUR devices including the 1N6012UR-1/TR.
Is the 1N6012UR-1/TR RoHS compliant?
Yes, the 1N6012UR-1/TR is RoHS compliant, as indicated by the "e3" suffix in its full nomenclature (1N6012BUR-1 e3 TR). Per the "Part Nomenclature" section on page 2, "e3" denotes RoHS-compliant matte-tin plating, and the datasheet confirms this option is available for commercial-grade devices only - which applies to the 1N6012UR-1/TR.
What is the maximum Zener current (IZM) for the 1N6012UR-1/TR?
The maximum Zener current (IZM) for the 1N6012UR-1/TR is 110 mA, as specified in the Electrical Characteristics table on page 3 under the "Max. dc Zener Current IZM" column for the 1N6012BUR entry. This value corresponds to the nominal 33 V rating and assumes operation within the 0.5 W power limit at 25 °C ambient.
Does the 1N6012UR-1/TR have a defined temperature coefficient?
Yes, the 1N6012UR-1/TR has a typical temperature coefficient (αVZ) of +0.094 %/°C, as listed in the Electrical Characteristics table on page 3 for the 1N6012BUR row. This positive coefficient indicates that the Zener voltage increases slightly with rising junction temperature - a critical factor for high-precision reference designs operating across wide thermal ranges.
What package type does the 1N6012UR-1/TR use, and is it compatible with automated SMT assembly?
The 1N6012UR-1/TR uses the DO-213AA (also labeled MLL34 or SOD80) MELF glass package, explicitly stated in the "Mechanical and Packaging" section on page 2. Its cylindrical geometry and tin-lead or RoHS-compliant matte-tin end-cap plating meet MIL-STD-750 Method 2026 solderability requirements, making it fully compatible with standard reflow soldering and automated pick-and-place SMT processes.
1N6012UR-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):
- 33 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- 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
1N6012UR-1/TR FAQ
1.How can I place an order for 1N6012UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6012UR-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 1N6012UR-1/TR reliable?
The price and inventory of 1N6012UR-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 1N6012UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N6012UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6012UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6012UR-1/TR?
1N6012UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6012UR-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 1N6012UR-1/TR?
For technical support, including 1N6012UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6012UR-1/TR requirements.
6.How does Aetrix verify that 1N6012UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N6012UR-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 1N6012UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N6012UR-1/TR?
All 1N6012UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6012UR-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 1N6012UR-1/TR part is unused and in its original packaging.
Return procedure for 1N6012UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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