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Microchip Technology 1N6028UR-1/TR
- Part No.:
- 1N6028UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N6028UR-1/TR.pdf
- Description:
- DIODE ZENER 150V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,733
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Product details
Overview
1N6028UR-1/TR from Microsemi is a surface-mount 500 mW Zener diode in DO-213AA (MELF) package, rated for 150 V nominal Zener voltage at 1.0 mA test current, with ±5% tolerance (B suffix), 1700 Ω dynamic impedance at IZT, and operating junction temperature range of –65 °C to +175 °C. It serves as a precision voltage reference or shunt regulator in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N6028UR-1/TR datasheet, 1N6028UR-1/TR pinout, 1N6028UR-1/TR application, or 1N6028UR-1/TR equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low test current, thermal resistance (RθJA = 300 °C/W), RoHS compliance status, and MELF package handling requirements for automated assembly.
Technical Context
This device operates in reverse breakdown mode with cathode band indicating the positive terminal during regulation. Its Zener voltage is specified at 1.0 mA (IZT), and its dynamic impedance (ZZT = 1700 Ω) reflects voltage stability under small-signal AC modulation superimposed on DC bias.
The DO-213AA glass MELF package provides hermetic sealing, metallurgical bonding, and compatibility with reflow soldering per MIL-STD-750 method 2026. Thermal performance is defined for mounting on FR4 PCB with 1 oz copper and specified footprint, yielding RθJA = 300 °C/W and RθJL = 150 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 150 V ±5% at IZT = 1.0 mA - defines regulated output voltage under nominal bias |
| Power Dissipation (PD) | 0.5 W at TA ≤ 25 °C - limits continuous DC power in ambient conditions without derating |
| Dynamic Impedance (ZZT) | 1700 Ω at IZT = 1.0 mA - indicates voltage variation per mA change in current near regulation point |
| Reverse Leakage (IR) | 0.1 µA at VR = 122 V - ensures minimal parasitic current below knee voltage |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in extended industrial and aerospace environments |
| Thermal Resistance (RθJA) | 300 °C/W on FR4 board - determines temperature rise per watt dissipated in standard layout |
| Forward Voltage (VF) | 1.1 V at IF = 200 mA - relevant for forward-bias ESD or fault-path analysis |
Pinout & Package
DO-213AA (MELF) glass package: cylindrical hermetically sealed body with tin-lead or matte-tin end-cap terminations; cathode identified by single dark band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference node / ground-side connection | Connected to lower-potential side of regulated circuit; carries full Zener current in shunt configuration |
| Cathode (banded end) | Regulated output node | Connected to voltage node being stabilized; must be held at higher potential than anode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA (MLL34) package | Enables high-density automated placement and reflow compatibility while maintaining hermetic reliability |
| Metallurgically bonded construction | Ensures mechanical robustness and stable electrical parameters under thermal cycling and vibration |
| RoHS-compliant option (e3 suffix) | Meets EU directive requirements for commercial-grade versions without lead-based plating |
| Low capacitance design | Minimizes signal coupling and noise injection in high-frequency regulation or sensing applications |
| Radiation-hardened characteristics | Validated per Microsemi MicroNote 050 for use in space-qualified and high-reliability systems |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing error amplifier input in isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 150 V threshold for optocoupler-driven regulation loop. Use Value: Tight ±5% VZ tolerance and low 1700 Ω ZZT ensure stable loop gain and minimal output drift across line/load variations. | Use Scenario: Biasing high-voltage sensor front-end in motor drive current monitoring. IC Role / Device Role / Timing Role: Precision clamping element protecting ADC input against transients exceeding 150 V. Use Value: Confirmed 0.1 µA leakage at 122 V enables accurate low-current measurement without loading error. |
| Overvoltage Protection Circuit | Aerospace Power Bus Monitor |
Use Scenario: Crowbar trigger reference in 120 V DC rail protection subsystem. IC Role / Device Role / Timing Role: Zener element setting trip threshold for SCR gate firing in fail-safe shutdown path. Use Value: –65 °C to +175 °C junction rating supports operation in unheated avionics bays and engine-near enclosures. | Use Scenario: Voltage margin verification in satellite power distribution unit with 100–160 V operational range. IC Role / Device Role / Timing Role: Radiation-hardened reference for telemetry comparator detecting bus overvoltage events. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for additional shielding or derating in LEO missions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6028BUR-1/TR | Same Zener voltage (150 V), identical DO-213AA package, but B suffix denotes ±5% tolerance vs. UR's unspecified tolerance - UR implies commercial-grade B tolerance per nomenclature table | No functional difference in regulation accuracy; UR and B both map to ±5% per part nomenclature | Select 1N6028BUR-1/TR if RoHS compliance is not required and legacy B-marked reels are preferred |
| MMBZ5269B-7-F | 150 V ±5%, SOD-123 package, 200 mW rating, higher ZZT (2000 Ω), lower IZM (10 mA max) | Lower power handling and higher impedance limit use to low-current references; unsuitable for >250 mW dissipation | Choose MMBZ5269B-7-F only for space-constrained PCBs where 0.5 W dissipation is not needed |
Compared with 1N6028UR-1/TR, 1N6028BUR-1/TR offers identical electrical specs and packaging but differs only in RoHS marking; MMBZ5269B-7-F trades power capability and impedance for smaller footprint, making it viable only in low-power, area-sensitive designs.
Availability
1N6028UR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and aerospace power bus monitors requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N6028UR-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 1N6028UR-1/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR Zener series, designed specifically for precision voltage regulation in harsh-environment applications demanding hermetic packaging, wide temperature operation, and radiation tolerance.
FAQ
What is the Zener voltage tolerance for 1N6028UR-1/TR?
The 1N6028UR-1/TR has a nominal Zener voltage of 150 V with ±5% tolerance, consistent with the "B" suffix in Microsemi's part nomenclature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0228-1, where 1N6028BUR (identical voltage grade) is listed with B-suffix tolerance and matches the UR-1 designation per the nomenclature guide.
Is 1N6028UR-1/TR RoHS compliant?
Yes, the "e3" RoHS-compliant version is available for commercial-grade 1N6028UR-1/TR, as stated in the Features section and Part Nomenclature table. The e3 suffix indicates matte-tin end-cap plating, and RoHS compliance applies only to commercial variants-not screened military versions.
What is the maximum Zener current (IZM) for 1N6028UR-1/TR?
The maximum dc Zener current for 1N6028UR-1/TR is 1250 mA, calculated per Note 3 on page 4 using PD = 0.5 W and VZM = 157.5 V (150 V × 1.05). This value is confirmed in the Electrical Characteristics table for 1N6028BUR, which shares identical ratings with 1N6028UR-1/TR.
Does 1N6028UR-1/TR have a specified forward voltage?
Yes, the forward voltage (VF) for 1N6028UR-1/TR is 1.1 V at IF = 200 mA, as listed in the Maximum Ratings table on page 1. This parameter is relevant for forward-bias behavior during ESD events or fault conditions, and is consistent across the entire 1N5985BUR–1N6031BUR series.
What package type does 1N6028UR-1/TR use?
The 1N6028UR-1/TR uses the DO-213AA (also designated SOD-80 or MLL34) glass MELF package, as explicitly stated in the Mechanical and Packaging section. Its dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length, with cathode indicated by a single band.
1N6028UR-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):
- 150 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
1N6028UR-1/TR FAQ
1.How can I place an order for 1N6028UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6028UR-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 1N6028UR-1/TR reliable?
The price and inventory of 1N6028UR-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 1N6028UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N6028UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6028UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6028UR-1/TR?
1N6028UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6028UR-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 1N6028UR-1/TR?
For technical support, including 1N6028UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6028UR-1/TR requirements.
6.How does Aetrix verify that 1N6028UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N6028UR-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 1N6028UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N6028UR-1/TR?
All 1N6028UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6028UR-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 1N6028UR-1/TR part is unused and in its original packaging.
Return procedure for 1N6028UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6028UR-1/TR Tags
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