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Microchip Technology 1N6018UR-1/TR
- Part No.:
- 1N6018UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6018UR-1/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,576
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Product details
Overview
1N6018UR-1/TR from Microsemi is a surface-mount 56 V, 500 mW Zener diode in DO-213AA (MLL34/SOD80) MELF package, rated for ±5% voltage tolerance at 2 mA test current, with 200 Ω dynamic impedance and +0.096 %/°C temperature coefficient - used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N6018UR-1/TR datasheet, 1N6018UR-1/TR pinout, 1N6018UR-1/TR application, or 1N6018UR-1/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant plating details, and direct alternatives for industrial power management and aerospace-grade voltage references.
Technical Context
This Zener operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgically bonded glass construction ensures stable leakage performance (<0.1 µA at 43 V) and inherent radiation hardness per MicroNote 050.
Thermal design relies on junction-to-end-cap resistance of 150 °C/W and junction-to-ambient resistance of 300 °C/W when mounted on FR4 with 1 oz copper and specified footprint. Derating begins linearly above 25 °C ambient, reaching zero power at 125 °C end cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 2 mA - defines nominal regulation point with tight tolerance for stable reference generation. |
| Power Dissipation (PD) | 0.5 W at TA ≤ 25 °C - sets maximum continuous DC power under standard board-mount conditions. |
| Dynamic Impedance (ZZT) | 200 Ω at IZT = 2 mA - determines output impedance near regulation knee; impacts load regulation error. |
| Reverse Leakage (IR) | <0.1 µA at VR = 43 V - ensures minimal quiescent current in high-impedance bias networks. |
| Temp. Coefficient (αVZ) | +0.096 %/°C - quantifies voltage drift over temperature; enables compensation in precision references. |
| Forward Voltage (VF) | 1.1 V at IF = 200 mA - defines conduction threshold in forward bias; relevant for ESD protection path analysis. |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments without derating. |
Pinout & Package
DO-213AA (SOD80 / MLL34) MELF glass package: hermetically sealed, cylindrical body with tin-lead or RoHS-compliant matte-tin end-cap plating; cathode identified by single black band; weight 0.04 g; tape-and-reel packaging per EIA-481-B with 12 mm carrier tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or low-side return; forms reference potential for regulated output. |
| Cathode (banded end) | Zener regulation terminal | Applied positive bias relative to anode to enter breakdown; supplies stable 56 V reference voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables operation up to +175 °C junction temperature and provides intrinsic radiation hardness per MicroNote 050. |
| Metallurgical bonding | Ensures long-term stability of Zener voltage and leakage current under thermal cycling and high-reliability screening. |
| RoHS-compliant option | Matte-tin end-cap plating available for commercial-grade units - meets lead-free assembly requirements without solderability loss. |
| Low capacitance | Typical <1 pF at 0 V - preserves high-frequency response in RF bias networks and fast-switching regulator feedback paths. |
| MIL-PRF-19500 screening support | Available with MQ/MX/MV/CDS prefixes for JAN, JANTX, JANTXV, JANS levels - qualified for defense and space applications. |
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 node for TL431-like comparator input or direct shunt regulation. Use Value: 56 V rating allows safe operation across wide input transients; ±5% tolerance ensures ±2.8 V regulation accuracy at 2 mA. |
Use Scenario: Provides stable excitation voltage for RTD or strain gauge bridge circuits in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end biasing. Use Value: +0.096 %/°C tempco enables predictable drift correction; <0.1 µA leakage avoids bridge imbalance errors. |
| Aerospace Voltage Monitor | High-Reliability Backup Regulator |
|
Use Scenario: Monitors 28 V aircraft bus voltage using resistive divider into comparator, with Zener clamping protection. IC Role / Device Role / Timing Role: Overvoltage clamp and reference limiter in fault-detection circuitry. Use Value: Hermetic DO-213AA package withstands vibration and thermal shock; radiation-hardened per MicroNote 050. |
Use Scenario: Standby shunt regulator maintaining critical 56 V rail during main supply failure in telecom infrastructure. IC Role / Device Role / Timing Role: Fail-safe voltage clamp and backup reference generator. Use Value: 0.5 W power rating sustains 8.9 mA at 56 V; metallurgical bonds ensure reliability over 10+ year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6018UR-1 | No TR suffix - bulk or ammo-pack packaging; identical electrical specs and DO-213AA package. | Not supplied in EIA-481-B tape-and-reel; unsuitable for automated SMT placement without repackaging. | Select 1N6018UR-1/TR when requiring factory-loaded 12 mm tape for pick-and-place compatibility. |
| BZX55-C56 | DO-35 axial package; ±5% tolerance; 500 mW; 200 Ω ZZT; +0.09 %/°C tempco - same regulation point but different form factor. | Lacks MELF mechanical robustness and radiation hardness; not MIL-PRF-19500 qualified. | Choose BZX55-C56 only for cost-sensitive, non-military prototypes where axial mounting is acceptable. |
Compared with 1N6018UR-1/TR, the bulk 1N6018UR-1 offers identical performance but no SMT-ready packaging, while BZX55-C56 trades MELF reliability and screening capability for lower cost and axial through-hole compatibility - neither is pin-compatible due to differing packages.
Availability
1N6018UR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, aerospace voltage monitors, and high-reliability backup regulators requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N6018UR-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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N6018UR-1/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR Zener family - engineered for precision voltage regulation in mission-critical systems where thermal stability, radiation tolerance, and MIL-qualified screening are mandatory.
FAQ
What is the Zener voltage tolerance and test current for 1N6018UR-1/TR?
The 1N6018UR-1/TR has a nominal Zener voltage of 56 V with ±5% tolerance, measured at a test current (IZT) of 2 mA. This tolerance ensures regulation accuracy within ±2.8 V under stable thermal conditions and defines the device's primary specification for reference design validation.
Is 1N6018UR-1/TR RoHS compliant?
Yes, the 1N6018UR-1/TR is RoHS compliant, featuring matte-tin end-cap plating per the "e3" designation in its nomenclature. This compliance applies to commercial-grade units only and supports lead-free reflow soldering per JEDEC J-STD-020.
What package type does 1N6018UR-1/TR use, and how is polarity marked?
The 1N6018UR-1/TR uses the DO-213AA (SOD80/MLL34) MELF glass package. Polarity is indicated by a single black cathode band on the cylindrical body - the banded end is the cathode and must be biased positively relative to the unbanded anode for Zener operation.
Can 1N6018UR-1/TR replace 1N6018BUR-1 in existing designs?
Yes, 1N6018UR-1/TR is functionally identical to 1N6018BUR-1 except for packaging: both share the same 56 V Zener voltage, ±5% tolerance, 200 Ω ZZT, and DO-213AA package. The "UR" suffix denotes Microsemi's internal revision; "TR" confirms tape-and-reel delivery.
What is the maximum reverse leakage current for 1N6018UR-1/TR at 43 V?
The maximum reverse leakage current (IR) for 1N6018UR-1/TR is 0.1 µA at VR = 43 V and TA = 30 °C. This ultra-low leakage supports high-impedance bias networks and minimizes error in precision reference applications.
1N6018UR-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):
- 56 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
1N6018UR-1/TR FAQ
1.How can I place an order for 1N6018UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6018UR-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 1N6018UR-1/TR reliable?
The price and inventory of 1N6018UR-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 1N6018UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N6018UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6018UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6018UR-1/TR?
1N6018UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6018UR-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 1N6018UR-1/TR?
For technical support, including 1N6018UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6018UR-1/TR requirements.
6.How does Aetrix verify that 1N6018UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N6018UR-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 1N6018UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N6018UR-1/TR?
All 1N6018UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6018UR-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 1N6018UR-1/TR part is unused and in its original packaging.
Return procedure for 1N6018UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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