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Microchip Technology 1N6021UR-1/TR
- Part No.:
- 1N6021UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6021UR-1/TR.pdf
- Description:
- DIODE ZENER 75V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,342
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Product details
Overview
1N6021UR-1/TR from Microsemi is a surface-mount 75 V, 500 mW Zener diode in DO-213AA (MLL34/SOD80) 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-1/TR datasheet, 1N6021UR-1/TR pinout, 1N6021UR-1/TR application, or 1N6021UR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (300 °C/W), low leakage (<0.1 µA at 56 V), RoHS-compliant matte-tin plating, and MIL-PRF-19500 screening compatibility.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with regulation established at 75 V ±5% under 2.0 mA test current. Its 265 Ω dynamic impedance (ZZT) and +0.098 %/°C temperature coefficient ensure stable output across temperature and load variations.
The DO-213AA glass MELF package provides hermetic sealing, inherent radiation hardness per MicroNote 050, and minimal junction capacitance (~6.7 pF). It is rated for 0.5 W dissipation at 25 °C with derating to zero at 175 °C junction temperature.
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 - sets maximum continuous power handling on FR4 board with 1 oz Cu |
| Dynamic Impedance (ZZT) | 265 Ω at IZT = 2.0 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | <0.1 µA at 56 V - ensures negligible current draw in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 300 °C/W - defines temperature rise per watt on standard FR4 layout; critical for thermal design margin |
| Temp. Coefficient (αVZ) | +0.098 %/°C - quantifies voltage drift with ambient temperature; enables compensation in precision circuits |
| Package | DO-213AA (MLL34/SOD80) - glass MELF surface-mount package with end-cap terminations and cathode band marking |
Pinout & Package
DO-213AA (MLL34/SOD80) is a cylindrical glass MELF package with two metallized end caps serving as anode and cathode terminals. Cathode is marked by a single black band; polarity must be observed for correct Zener operation (banded end positive in regulation mode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential node; reverse-biased to maintain 75 V reference across load |
| Anode (unbanded end) | Reference return terminal | Connected to circuit ground or lower-potential node; completes Zener current path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Enables operation from −65 °C to +175 °C with immunity to moisture-induced degradation |
| RoHS-compliant matte-tin plating | Supports lead-free reflow soldering up to 260 °C for 10 s without delamination or bond failure |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for use in space-qualified and high-reliability systems |
| MIL-PRF-19500 screening option | Enables military-grade reliability qualification via prefix addition (e.g., MQ, MX, MV, CDS) |
| Low junction capacitance | Typical 6.7 pF at 75 V - minimizes signal coupling and noise injection in high-frequency reference paths |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces TL431 in cost-sensitive designs. Use Value: 75 V rating allows direct sensing of auxiliary winding voltages; ±5% tolerance ensures <±1% output regulation over line/load. | Use Scenario: Provides stable excitation voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric sensor biasing and ADC reference scaling. Use Value: +0.098 %/°C tempco and <0.1 µA leakage enable sub-0.1% full-scale error over −40 to +85 °C operating range. |
| Overvoltage Protection Clamp | High-Voltage Analog Front-End |
Use Scenario: Placed across input rails of telecom line cards to clamp transient surges above 75 V. IC Role / Device Role / Timing Role: Fast-acting shunt protection device limiting voltage to safe levels during lightning-induced spikes. Use Value: 265 Ω ZZT and 0.5 W rating allow sustained clamping at 2.0 mA without thermal runaway; glass package withstands surge energy. | Use Scenario: Biasing network component in medical imaging front-end amplifiers requiring ultra-low leakage and stable DC offset. IC Role / Device Role / Timing Role: High-impedance voltage reference node stabilizing op-amp common-mode voltage in 16-bit data acquisition systems. Use Value: Minimal capacitance (6.7 pF) prevents phase shift in high-gain analog stages; hermetic seal ensures long-term parameter stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C75 | Same 75 V ±5%, but DO-35 axial package; higher RθJA (500 °C/W); no MIL screening option | Limited to through-hole PCBs; unsuitable for high-density SMT layouts or military screening requirements | Select when legacy through-hole assembly or lower-cost procurement is prioritized over surface-mount density |
| MMBZ5265B | 75 V ±5%, SOT-23 package; lower PD (350 mW); higher ZZT (500 Ω); no radiation hardness documentation | Not suitable for >150 °C environments or radiation-intensive applications; limited power handling in clamping roles | Select only for low-power, commercial-grade consumer electronics where size and cost outweigh reliability needs |
Compared with BZX55C75 and MMBZ5265B, the 1N6021UR-1/TR delivers superior thermal performance (300 °C/W vs. 500/400 °C/W), proven radiation hardness, and MIL-PRF-19500 qualification path-making it the preferred choice for industrial, aerospace, and high-reliability power regulation.
Availability
1N6021UR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and high-voltage analog front-ends requiring stable component supply and long-term obsolescence management.
Supply support for 1N6021UR-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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N6021UR-1/TR belongs to Microsemi's legacy DO-213AA Zener series designed for precision voltage regulation in harsh-environment applications demanding extended temperature range, hermetic sealing, and MIL-spec compliance.
FAQ
What is the Zener voltage tolerance and test current for the 1N6021UR-1/TR?
The 1N6021UR-1/TR has a nominal Zener voltage of 75 V with ±5% tolerance, measured at a test current (IZT) of 2.0 mA. This tolerance ensures predictable regulation behavior in feedback and reference circuits, and the specified test condition aligns with JEDEC standards for consistent characterization across production lots.
Is the 1N6021UR-1/TR RoHS compliant?
Yes, the 1N6021UR-1/TR is RoHS compliant with matte-tin plating on its end caps, qualified for lead-free reflow soldering up to 260 °C for 10 seconds. RoHS compliance applies to commercial-grade units only; military-screened variants (e.g., MQ/MX prefixes) follow different material specifications.
What is the maximum reverse leakage current specification for the 1N6021UR-1/TR?
The 1N6021UR-1/TR exhibits a maximum reverse leakage current (IR) of 0.1 µA at 56 V, as specified in the Electrical Characteristics table. This ultra-low leakage supports high-impedance bias networks and precision reference applications where parasitic current paths must be minimized.
Can the 1N6021UR-1/TR be used in high-temperature environments?
Yes, the 1N6021UR-1/TR is rated for junction and storage temperatures from −65 °C to +175 °C. Its DO-213AA glass package and internal metallurgical bonds ensure reliable operation in extended-temperature industrial and aerospace systems, provided thermal derating per Figure 1 is applied.
Does the 1N6021UR-1/TR have documented radiation hardness?
Yes, the 1N6021UR-1/TR is inherently radiation hard as described in Microsemi MicroNote 050. This characteristic stems from its hermetically sealed glass construction and material selection, making it suitable for space-qualified and nuclear instrumentation applications without additional shielding.
1N6021UR-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):
- 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-1/TR FAQ
1.How can I place an order for 1N6021UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6021UR-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 1N6021UR-1/TR reliable?
The price and inventory of 1N6021UR-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 1N6021UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N6021UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6021UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6021UR-1/TR?
1N6021UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6021UR-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 1N6021UR-1/TR?
For technical support, including 1N6021UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6021UR-1/TR requirements.
6.How does Aetrix verify that 1N6021UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N6021UR-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 1N6021UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N6021UR-1/TR?
All 1N6021UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6021UR-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 1N6021UR-1/TR part is unused and in its original packaging.
Return procedure for 1N6021UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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