My Inquiry
My Account
Microchip Technology 1N6018UR/TR
- Part No.:
- 1N6018UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6018UR/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,643
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6018UR/TR from Microsemi is a surface-mount 56 V, 5% tolerance Zener diode in DO-213AA (MLL34/SOD80) MELF package, rated for 500 mW power dissipation at 25°C, with 2.0 mA test current, 200 Ω dynamic impedance at IZT, and ±0.096%/°C temperature coefficient - used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N6018UR/TR datasheet, 1N6018UR/TR pinout, 1N6018UR/TR application, or 1N6018UR/TR equivalent, key selection criteria include Zener voltage accuracy (±5%), low dynamic impedance (200 Ω), stable temperature coefficient (+0.096%/°C), RoHS-compliant matte-tin plating, and DO-213AA thermal performance (RθJA = 300°C/W on FR4).
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with regulation defined at IZT = 2.0 mA and VZ = 56 V. Its metallurgically bonded glass construction ensures high reliability and radiation hardness per MicroNote 050.
The DO-213AA package enables surface-mount assembly with end-cap soldering per MIL-STD-750 Method 2026, and its MELF geometry provides uniform thermal distribution and minimal capacitance (<10 pF typical at 56 V), critical for noise-sensitive analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 2.0 mA - defines precise regulation point for feedback networks. |
| Power Dissipation (PD) | 0.5 W at TA ≤ 25°C - sets maximum continuous power handling on standard FR4 PCB. |
| Dynamic Impedance (ZZT) | 200 Ω at IZT = 2.0 mA - determines output voltage stability under load transients. |
| Temp. Coefficient (αVZ) | +0.096 %/°C - quantifies voltage drift over temperature; enables predictable compensation design. |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 43 V - ensures minimal error current in high-impedance reference paths. |
| Forward Voltage (VF) | 1.1 V at IF = 200 mA - relevant for ESD protection or dual-use clamp configurations. |
| Junction Temp. Range | –65°C to +175°C - supports operation in extended industrial and aerospace environments. |
Pinout & Package
DO-213AA (SOD80 / MLL34) MELF glass package with hermetically sealed construction, tin-lead or RoHS-compliant matte-tin end-cap plating, cathode indicated by single band. No discrete pins - terminals are axial end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap (banded) | Zener Anode Connection | Connected to regulated output node; polarity must be observed for correct breakdown biasing. |
| Anode End Cap (unbanded) | Zener Cathode Connection | Connected to reference ground or lower-potential rail; forms reverse-biased junction with cathode cap. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA package | Enables automated placement and reflow compatibility while maintaining hermetic glass reliability. |
| Metallurgical bonding | Eliminates wire bonds to improve thermal cycling endurance and long-term parameter stability. |
| Low dynamic impedance (200 Ω) | Minimizes output voltage variation under changing load currents in precision reference applications. |
| Radiation-hardened construction | Validated per MicroNote 050 for total ionizing dose tolerance - suitable for space-qualified designs. |
| ESD-insensitive (MIL-STD-750 Method 1020) | Reduces handling risk and eliminates need for special ESD controls during assembly. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loops using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener reference providing stable 56 V threshold for TL431-like comparator biasing or direct shunt regulation. Use Value: Tight 5% tolerance and low ZZT ensure ±1% output regulation accuracy across line/load/temperature. | Use Scenario: Supplies stable excitation voltage to bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC front-ends requiring low-drift bias. Use Value: +0.096%/°C tempco and <0.1 µA leakage enable sub-0.1% full-scale error over –40°C to +85°C. |
| Overvoltage Protection Clamp | Aerospace Power Monitor |
Use Scenario: Clamps transient surges on 48 V DC bus lines in telecom or railway control cabinets. IC Role / Device Role / Timing Role: Shunt protector absorbing energy above 56 V threshold during lightning-induced spikes. Use Value: 500 mW rating and robust glass package withstand repeated 100 ms transients without degradation. | Use Scenario: Monitors auxiliary bus voltage in satellite power distribution units with radiation-exposed routing. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference for ADC calibration in on-board telemetry systems. Use Value: Inherent TID hardness per MicroNote 050 eliminates need for shielding or derating in LEO missions. |
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 | Tape-and-reel packaging omitted; same electrical specs and DO-213AA package. | Not optimized for high-volume SMT production; requires manual loading or bulk feeders. | Select 1N6018UR/TR when automated pick-and-place and consistent reel logistics are required. |
| BZX55-C56 | 5% tolerance, 500 mW, but in DO-35 axial package; higher RθJA (~500°C/W); no radiation hardening. | Suitable only for non-radiation, non-SMT, commercial-grade applications with relaxed thermal constraints. | Choose BZX55-C56 only for prototyping or legacy through-hole designs where DO-213AA footprint is unavailable. |
Compared with 1N6018UR/TR, the 1N6018UR-1 offers identical regulation performance but lacks tape-and-reel convenience, while BZX55-C56 trades SMT compatibility, thermal efficiency, and radiation tolerance for lower cost and wider distributor availability in axial form.
Availability
1N6018UR/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for 1N6018UR/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N6018UR/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener series, designed specifically for precision voltage regulation in mission-critical power and sensing applications where stability, reliability, and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance and test current for 1N6018UR/TR?
The 1N6018UR/TR has a nominal Zener voltage of 56 V with ±5% tolerance, measured at a test current (IZT) of 2.0 mA. This tolerance is specified per the "B" suffix in the part nomenclature and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0228-1 Rev. 1. The 2.0 mA test condition ensures repeatable characterization of regulation behavior.
Is 1N6018UR/TR RoHS compliant?
Yes, 1N6018UR/TR is RoHS compliant (e3 marking), with matte-tin end-cap plating meeting EU Directive 2011/65/EU requirements. RoHS compliance applies only to commercial-grade versions; military-screened variants (e.g., JANTXV) retain tin-lead plating and are not RoHS compliant.
What package type does 1N6018UR/TR use, and what are its thermal characteristics?
The 1N6018UR/TR uses the DO-213AA (SOD80/MLL34) MELF glass package. Its thermal resistance is RθJA = 300°C/W and RθJL = 150°C/W when mounted on FR4 with 1 oz copper and the recommended footprint. These values define safe power derating curves shown in Figure 1 of the datasheet.
Does 1N6018UR/TR have radiation hardness certification?
Yes, 1N6018UR/TR exhibits inherent radiation hardness validated per Microsemi MicroNote 050, covering total ionizing dose (TID) effects. While not individually certified to MIL-STD-883, its glass/MELF construction and metallurgical bonding provide proven resilience in low-earth orbit and nuclear instrumentation environments.
What is the maximum reverse leakage current for 1N6018UR/TR, and at what voltage is it specified?
The maximum reverse leakage current (IR) for 1N6018UR/TR is 0.1 µA, specified at VR = 43 V (77% of nominal VZ). This value is confirmed in the Electrical Characteristics table on page 3 and reflects low error current essential for high-impedance reference applications.
1N6018UR/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/TR FAQ
1.How can I place an order for 1N6018UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6018UR/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/TR reliable?
The price and inventory of 1N6018UR/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/TR is usually 5 days.
3.What payment methods are accepted for 1N6018UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6018UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6018UR/TR?
1N6018UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6018UR/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/TR?
For technical support, including 1N6018UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6018UR/TR requirements.
6.How does Aetrix verify that 1N6018UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N6018UR/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/TR meets industry standards.
7.What is the process for return or replacement of 1N6018UR/TR?
All 1N6018UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6018UR/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/TR part is unused and in its original packaging.
Return procedure for 1N6018UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6018UR/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
