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Microchip Technology 1N6021UR/TR
- Part No.:
- 1N6021UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6021UR/TR.pdf
- Description:
- DIODE ZENER 75V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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Product details
Overview
1N6021UR/TR from Microsemi is a surface-mount 75 V, 500 mW Zener diode in DO-213AA (SOD-80/MELF) package with ±5% voltage tolerance, 2.0 mA test current, and 265 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N6021UR/TR datasheet, 1N6021UR/TR pinout, 1N6021UR/TR application, or 1N6021UR/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for industrial power management and analog reference design.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased breakdown mode, with Zener voltage specified at 75 V ±5% under 2.0 mA DC test current (IZT). Its 265 Ω dynamic impedance (ZZT) at IZT and 0.1 µA max reverse leakage at 60 V define regulation stability across temperature and load variations.
Designed for surface-mount assembly on FR4 PCBs with 1 oz copper, it exhibits 150 °C/W junction-to-end-cap thermal resistance and requires derating above 100 °C end-cap temperature per Figure 1. The cathode band denotes polarity, and operation requires banded end positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at 2.0 mA - defines nominal regulation point with tight tolerance for stable reference generation |
| Power Dissipation (PD) | 0.5 W at 25 °C ambient - sets maximum continuous power handling before thermal derating applies |
| Dynamic Impedance (ZZT) | 265 Ω at IZT = 2.0 mA - quantifies AC voltage variation under small-signal ripple; lower values improve regulation fidelity |
| Reverse Leakage (IR) | ≤0.1 µA at 60 V - ensures minimal shunt current in standby, critical for low-power bias networks |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in harsh environments including automotive under-hood and industrial controls |
| Forward Voltage (VF) | 1.1 V at 200 mA - enables use as clamping diode in bidirectional protection schemes when forward-biased |
| Thermal Resistance (RθJA) | 300 °C/W on FR4 - determines temperature rise per watt; mandates layout-aware copper pour for sustained 0.5 W operation |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry and cathode band marking; terminals are metallurgically bonded end caps, tin-lead or RoHS-compliant matte-tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher potential during Zener operation; polarity marker essential for correct orientation in feedback paths |
| Anode (unbanded end) | Reference/return node | Typically tied to system ground or error amplifier inverter input; forms low-impedance return path for regulation current |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA package | Enables automated placement and reflow compatibility while maintaining hermetic reliability of glass encapsulation |
| ±5% Zener voltage tolerance (B suffix) | Meets precision reference requirements without trimming; tighter than standard 10% commercial Zeners |
| Low capacitance (typ. <1 pF at 0 V) | Minimizes high-frequency loading in oscillator and RF bias networks; confirmed by Figure 2 |
| Radiation-hardened construction | Inherently resistant to total ionizing dose (TID), validated per MicroNote 050 - suitable for space-qualified subsystems |
| ESD-insensitive (MIL-STD-750, Method 1020) | Eliminates need for external ESD protection in handling and board-level integration |
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 establishes precise 75 V threshold for TL431-like comparator action in secondary-side regulation. Use Value: Tight ±5% tolerance and low ZZT ensure <±1% output accuracy over line/load/temperature; DO-213AA footprint supports high-density PCB layouts. |
Use Scenario: Provides stable excitation voltage for RTD or strain gauge bridge circuits in process control transmitters. IC Role / Device Role / Timing Role: Acts as low-noise, low-drift voltage reference source for instrumentation amplifier biasing. Use Value: –65 °C to +175 °C operating range and radiation hardness enable deployment in oilfield downhole tools and factory-floor sensors. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamps transient surges on 48 V telecom power rails to prevent damage to downstream DC-DC converters. IC Role / Device Role / Timing Role: Two-terminal shunt protector activated above 75 V; dissipates energy as heat during fault events. Use Value: 0.5 W rating and 300 °C/W RθJA allow brief 100 ms surge absorption without thermal runaway on standard FR4. |
Use Scenario: Sets trip point for comparator-based battery pack voltage monitoring in UPS systems. IC Role / Device Role / Timing Role: Precision 75 V reference input to LM393 comparator triggers shutdown when cell stack exceeds safe limit. Use Value: 0.1 µA leakage at 60 V prevents false triggering; cathode-band polarity ensures unambiguous connection to comparator inverting input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C75 | 300 mW SOT-23 package; 75 V ±5%; ZZT = 350 Ω @ 5 mA | Lower power rating and higher dynamic impedance reduce regulation accuracy under varying loads | Choose for space-constrained PCBs where 0.3 W suffices and SMT pick-and-place compatibility is prioritized |
| 1N4744A | 1 W DO-41 axial package; 75 V ±5%; ZZT = 15 Ω @ 25 mA | Higher power and lower ZZT improve regulation but require through-hole assembly and larger board area | Choose when >0.5 W dissipation is needed or legacy axial footprint must be maintained |
Compared with BZX84-C75 and 1N4744A, the 1N6021UR/TR uniquely balances 0.5 W power, 265 Ω ZZT, and DO-213AA surface-mount reliability-making it optimal for modern industrial SMPS designs requiring hermetic stability without axial leads or excessive thermal mass.
Availability
1N6021UR/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage protection clamps, and programmable threshold detectors requiring stable component supply and long-term obsolescence mitigation.
Supply support for 1N6021UR/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 1N6021UR/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener series, engineered for stable voltage regulation in mission-critical power and reference circuits where hermeticity, temperature resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N6021UR/TR?
The 1N6021UR/TR has a nominal Zener voltage of 75 V with ±5% tolerance, indicated by the "B" suffix in its nomenclature per Microsemi's part numbering system. This tolerance is measured at 2.0 mA test current and ensures predictable regulation performance across manufacturing lots and temperature ranges.
Is the 1N6021UR/TR RoHS compliant?
Yes, the 1N6021UR/TR is RoHS compliant, as confirmed by the "e3" designation in its full part number (1N6021BUR-1 e3). RoHS compliance applies only to commercial-grade versions and is achieved via matte-tin plating on the DO-213AA end caps.
What is the maximum reverse leakage current for the 1N6021UR/TR?
The 1N6021UR/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at 60 V, per the Electrical Characteristics table on Page 3 of T4-LDS-0228-1 Rev. 1. This low leakage supports high-impedance bias networks and minimizes quiescent power loss.
Can the 1N6021UR/TR be used in high-temperature environments?
Yes, the 1N6021UR/TR is rated for junction and storage temperatures from –65 °C to +175 °C. Its DO-213AA glass package and internal metallurgical bonds maintain parameter stability in extended-temperature industrial and automotive under-hood applications.
What does the "TR" suffix mean in 1N6021UR/TR?
The "TR" suffix in 1N6021UR/TR indicates tape-and-reel packaging per EIA-481-B standard using 12 mm carrier tape. This format supports automated SMT assembly and is the standard shipping configuration for volume orders of the 1N6021UR/TR.
1N6021UR/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):
- 75 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
1N6021UR/TR FAQ
1.How can I place an order for 1N6021UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6021UR/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 1N6021UR/TR reliable?
The price and inventory of 1N6021UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6021UR/TR is usually 5 days.
3.What payment methods are accepted for 1N6021UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6021UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6021UR/TR?
1N6021UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6021UR/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 1N6021UR/TR?
For technical support, including 1N6021UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6021UR/TR requirements.
6.How does Aetrix verify that 1N6021UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N6021UR/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 1N6021UR/TR meets industry standards.
7.What is the process for return or replacement of 1N6021UR/TR?
All 1N6021UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6021UR/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 1N6021UR/TR part is unused and in its original packaging.
Return procedure for 1N6021UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6021UR/TR Tags
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