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Microchip Technology 1N5987UR-1/TR
- Part No.:
- 1N5987UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5987UR-1/TR.pdf
- Description:
- DIODE ZENER 3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,538
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Product details
Overview
1N5987UR-1/TR from Microsemi is a surface-mount 3.0 V, 5% tolerance Zener diode in DO-213AA (MLL34/SOD80) MELF package, rated for 500 mW power dissipation at 25°C, with 95 mA test current, 2000 Ω dynamic impedance at IZT, and 50 µA maximum reverse leakage at 1.0 V. It serves as a precision voltage reference or shunt regulator in low-power analog monitoring circuits.
For engineers reviewing the 1N5987UR-1/TR datasheet, 1N5987UR-1/TR pinout, 1N5987UR-1/TR application, or 1N5987UR-1/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (300 °C/W), junction temperature range (–65 to +175 °C), RoHS compliance status, and DO-213AA mechanical compatibility with automated SMT placement.
Technical Context
This device operates as a silicon planar Zener diode with metallurgically bonded end caps and hermetically sealed glass construction. Its regulation behavior is defined at IZT = 95 mA, where VZ = 3.0 V ±5%, and dynamic impedance ZZT = 2000 Ω - indicating moderate noise rejection and stable knee characteristics suitable for non-critical biasing.
The DO-213AA package enables high-reliability mounting on FR4 PCBs with 1 oz copper, delivering RθJA = 300 °C/W and RθJL = 150 °C/W. Its cathode band marking and polarity requirement (banded end positive during regulation) define unidirectional reverse-bias operation with minimal capacitance (<10 pF typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.0 V ±5% at 95 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 DC power handling before thermal derating applies |
| Dynamic Impedance ZZT | 2000 Ω at 95 mA - indicates moderate AC impedance affecting regulation stability under varying load currents |
| Reverse Leakage IR | 50 µA max at 1.0 V - ensures low standby current in high-impedance bias networks |
| Junction Temperature Range | –65 to +175 °C - supports operation in extended industrial and aerospace environments |
| Thermal Resistance RθJA | 300 °C/W on FR4 - determines temperature rise per watt; requires layout-aware thermal management |
| Package Type | DO-213AA (SOD80/MLL34) MELF - cylindrical glass surface-mount package with end-cap terminations |
Pinout & Package
DO-213AA (SOD80/MLL34) MELF package: hermetically sealed glass cylinder with tin-lead or RoHS-compliant matte-tin plated end caps; cathode identified by single black band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node when used in shunt regulation |
| Cathode (banded end) | Zener breakdown terminal / regulation output node | Connected to regulated voltage rail; must be held at higher potential than anode for conduction |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA package | Enables automated SMT assembly and eliminates axial-leaded through-hole footprint constraints |
| Metallurgically bonded construction | Ensures long-term reliability and resistance to thermal cycling-induced bond fatigue |
| RoHS-compliant option (e3 suffix) | Meets EU environmental directives without compromising electrical performance or thermal rating |
| Low ESD sensitivity (MIL-STD-750, Method 1020) | Reduces handling risk during manufacturing and field service without requiring special grounding protocols |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for low-dose space-qualified subsystems |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Voltage Reference |
|---|---|
|
Use Scenario: Providing stable 3.0 V reference for analog front-end amplifiers in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing precise bias point for op-amp input stages and ADC reference dividers. Use Value: ±5% VZ tolerance and –65 to +175 °C operating range ensure calibration stability across factory and field temperature extremes. |
Use Scenario: Generating local 3.0 V supply for ultra-low-power MCU reset circuitry and brown-out detection. IC Role / Device Role / Timing Role: Low-current Zener clamp maintaining threshold voltage for POR/BOR comparators during startup and sleep transitions. Use Value: 50 µA leakage at 1.0 V minimizes quiescent current draw, extending battery life in coin-cell-powered edge nodes. |
| Automotive Cabin Control Panel Biasing | Medical Wearable Device Power Supervision |
|
Use Scenario: Regulating auxiliary 3.0 V rail for touch controller ICs and LED drivers in HVAC control modules. IC Role / Device Role / Timing Role: Passive voltage clamp absorbing transient overvoltage spikes on 5 V bus-derived rails. Use Value: Hermetic DO-213AA glass package withstands automotive thermal shock (–40 to +125 °C) and humidity exposure without parameter drift. |
Use Scenario: Monitoring Li-ion battery voltage thresholds in portable pulse oximeters and glucose meters. IC Role / Device Role / Timing Role: Precision shunt element in discrete comparator-based undervoltage lockout (UVLO) circuitry. Use Value: 2000 Ω ZZT provides predictable knee behavior for repeatable trip-point hysteresis design without active components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V0 | Same 3.0 V ±5%, but DO-35 axial package; 500 mW rating; higher ZZK (2300 Ω) and wider temp coefficient (+0.070 %/°C) | Requires through-hole assembly; less suitable for high-density SMT layouts | Select when legacy board designs or manual prototyping demand axial-leaded form factor |
| MMBZ5223BS | SOT-23 package; 3.0 V ±5%; lower PD (350 mW); tighter ZZT (1700 Ω); RoHS-only; no MIL-PRF-19500 screening option | Limited power handling and no high-reliability screening path; unsuitable for aerospace or military use | Select for cost-sensitive consumer electronics where volume SMT and RoHS compliance are primary requirements |
Compared with BZX55C3V0 and MMBZ5223BS, the 1N5987UR-1/TR offers superior thermal robustness (175 °C TJ), DO-213AA mechanical reliability, and optional MIL-PRF-19500 screening - making it the preferred choice for industrial and mission-critical embedded systems demanding long-term parametric stability.
Availability
1N5987UR-1/TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive cabin control panels, and medical wearable device power supervision requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1N5987UR-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 1N5985BUR-1 to 1N6031BUR-1 series was designed to deliver JEDEC-standard Zener regulation in ruggedized surface-mount form, supporting applications where long-term stability, thermal resilience, and screening-grade reliability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for the 1N5987UR-1/TR?
The 1N5987UR-1/TR has a nominal Zener voltage of 3.0 V with ±5% tolerance, measured at a test current IZT of 95 mA. This tolerance band ensures predictable regulation within 2.85 V to 3.15 V under specified conditions, and the 95 mA test point reflects its optimal operating region for stable dynamic impedance (2000 Ω) and minimal temperature coefficient drift.
Is the 1N5987UR-1/TR RoHS compliant?
Yes, the 1N5987UR-1/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5987UR-1/TR e3), indicating matte-tin plating per EU Directive 2011/65/EU. The base part number without "e3" denotes non-RoHS tin-lead termination; both versions share identical electrical specifications and DO-213AA packaging.
What does the "TR" suffix indicate in 1N5987UR-1/TR?
The "TR" suffix in 1N5987UR-1/TR specifies tape-and-reel packaging per EIA-481-B standard using 12 mm carrier tape. This format enables automated pick-and-place assembly and is supplied in reels containing quantities defined by Microsemi's standard ordering increments - distinct from bulk or ammo-pack alternatives.
Can the 1N5987UR-1/TR be used in high-reliability or military applications?
Yes - while the commercial 1N5987UR-1/TR is not screened, Microsemi offers equivalent parts with MQ (JAN), MX (JANTX), MV (JANTXV), or CDS (JANS) prefixes that meet MIL-PRF-19500 requirements. These variants retain the same DO-213AA package and 3.0 V Zener characteristics but undergo additional environmental and electrical screening for aerospace and defense use.
What is the maximum reverse leakage current specification for the 1N5987UR-1/TR?
The 1N5987UR-1/TR has a maximum reverse leakage current (IR) of 50 µA at 1.0 V applied reverse voltage, measured at 30°C lead temperature. This low leakage supports energy-efficient operation in battery-powered systems and ensures minimal error contribution when used as a reference in high-impedance divider networks.
1N5987UR-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):
- 3 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
1N5987UR-1/TR FAQ
1.How can I place an order for 1N5987UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5987UR-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 1N5987UR-1/TR reliable?
The price and inventory of 1N5987UR-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 1N5987UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5987UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5987UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5987UR-1/TR?
1N5987UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5987UR-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 1N5987UR-1/TR?
For technical support, including 1N5987UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5987UR-1/TR requirements.
6.How does Aetrix verify that 1N5987UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5987UR-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 1N5987UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5987UR-1/TR?
All 1N5987UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5987UR-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 1N5987UR-1/TR part is unused and in its original packaging.
Return procedure for 1N5987UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5987UR-1/TR Tags
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