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Microchip Technology 1N5987UR/TR
- Part No.:
- 1N5987UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5987UR/TR.pdf
- Description:
- DIODE ZENER 3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,060
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Product details
Overview
1N5987UR/TR from Microsemi is a surface-mount 3.0 V, 5% tolerance Zener diode in DO-213AA (SOD-80/MELF) package, rated for 500 mW power dissipation at 25°C, with 95 mA test current (IZT), 2000 Ω dynamic impedance (ZZT), and 50 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or shunt regulator in low-power analog circuits.
For engineers reviewing the 1N5987UR/TR datasheet, 1N5987UR/TR pinout, 1N5987UR/TR application, or 1N5987UR/TR equivalent, key selection criteria include Zener voltage accuracy (±5%), thermal resistance (300 °C/W), RoHS compliance (e3 suffix), MELF package robustness, and MIL-PRF-19500 screening compatibility.
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, with knee current IZK = 0.25 mA and dynamic impedance measured at 1 kHz with 10% rms ac modulation superimposed on IZT.
The 1N5987UR/TR exhibits a negative temperature coefficient of –0.070 %/°C and minimal junction capacitance (typical <2 pF at 0 V), enabling stable voltage reference performance across –65°C to +175°C operating range without ESD sensitivity per MIL-STD-750 Method 1020.
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 reference stability |
| Power Dissipation (PD) | 0.5 W at 25°C ambient - sets maximum continuous power handling on FR4 board with 1 oz Cu |
| Dynamic Impedance (ZZT) | 2000 Ω at IZT - indicates regulation stiffness; lower values improve load regulation |
| Reverse Leakage (IR) | 50 µA at 1.0 V - ensures low standby current in high-impedance bias networks |
| Junction Temperature Range | –65°C to +175°C - supports operation in extended industrial and aerospace environments |
| Thermal Resistance (RθJA) | 300 °C/W - determines temperature rise above ambient under full power; requires thermal pad design |
| Forward Voltage (VF) | 1.1 V at 200 mA - enables use as forward-biased clamp or protection diode when needed |
Pinout & Package
DO-213AA (SOD-80 / MELF) glass package with axial symmetry and cathode band marking; terminals are metallurgically bonded end caps plated with matte-tin (RoHS compliant) or tin-lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection during regulation | Must be held positive relative to anode to enter breakdown; band identifies polarity for PCB orientation |
| Anode (unbanded end) | Zener cathode connection during regulation | Reference ground node in shunt regulator topology; connects to system GND or low-impedance return |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables long-term reliability and moisture resistance without conformal coating |
| Metallurgically bonded end caps | Provides robust mechanical attachment and low thermal resistance path to PCB pads |
| Radiation-hardened structure | Meets inherent hardness per Microsemi MicroNote 050 - suitable for space-qualified designs |
| Non-ESD-sensitive design | Passes MIL-STD-750 Method 1020 - eliminates need for ESD handling controls in assembly |
| RoHS-compliant (e3) option | Matte-tin plating meets EU RoHS Directive 2011/65/EU for commercial-grade variants |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.0 V reference for ADC biasing or op-amp feedback in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC bias point independent of supply variation. Use Value: ±5% VZ tolerance and –0.070 %/°C TC ensure <±15 mV drift over 0–70°C, meeting 12-bit ADC reference requirements. | Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events in industrial control interfaces. IC Role / Device Role / Timing Role: Passive shunt clamp limiting voltage to 3.0 V before damage threshold of 5.5 V. Use Value: 2000 Ω ZZT and 50 µA IR at 1.0 V enable fast response with minimal leakage loading on protected signal lines. |
| Temperature-Stable Bias Network | MIL-PRF-19500 Qualified Regulator |
Use Scenario: Generating temperature-compensated bias currents in precision amplifier front-ends for test equipment. IC Role / Device Role / Timing Role: Zener-based current source where VZ stability directly sets output current accuracy. Use Value: Negative TC of –0.070 %/°C allows predictable compensation against positive TC components in same circuit. | Use Scenario: Power supply regulation in defense avionics modules requiring screened components per MIL-PRF-19500. IC Role / Device Role / Timing Role: Primary shunt regulator in redundant power conditioning stages with high-reliability screening. Use Value: Available with MQ/MX/MV/CDS prefixes for JAN, JANTX, JANTXV, and JANS levels - validated for 1000-hour life testing and burn-in. |
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 (not surface mount); higher RθJA (~500 °C/W) | Requires through-hole PCB layout; unsuitable for automated SMT assembly | Select when legacy through-hole design or manual prototyping is required |
| MMBZ5223BS | SOT-23 package; 3.0 V ±5%, but lower PD = 225 mW and higher ZZT = 25 Ω at 20 mA | Higher current density but limited power handling; not radiation-hardened | Select for space-constrained consumer boards where radiation hardness is not required |
Compared with BZX55C3V0 and MMBZ5223BS, the 1N5987UR/TR offers superior thermal performance (300 °C/W), inherent radiation hardness, and MELF package ruggedness - making it preferred for high-reliability SMT applications demanding long-term stability and environmental resilience.
Availability
1N5987UR/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamping, and MIL-PRF-19500 qualified regulation requiring stable component supply across aerospace, industrial instrumentation, and defense electronics programs.
Supply support for 1N5987UR/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 1N5987UR/TR belongs to Microsemi's legacy DO-213AA Zener diode family designed for precision voltage regulation in harsh environments where hermetic sealing, thermal stability, and screening compliance are critical.
FAQ
What is the Zener voltage tolerance and test current for the 1N5987UR/TR?
The 1N5987UR/TR has a nominal Zener voltage of 3.0 V with ±5% tolerance, verified at a test current (IZT) of 95 mA. This tolerance ensures consistent regulation performance across production lots and supports precision analog designs requiring stable reference points within tight error bands.
Is the 1N5987UR/TR RoHS compliant?
Yes, the "e3" suffix in 1N5987UR/TR indicates RoHS-compliant matte-tin plating on the end caps, meeting EU Directive 2011/65/EU. This applies only to commercial-grade versions; military-screened variants (e.g., MQ/ MX prefixes) retain tin-lead plating unless otherwise specified.
What package type does the 1N5987UR/TR use, and how is polarity marked?
The 1N5987UR/TR uses the DO-213AA (SOD-80/MELF) glass package with axial symmetry. Polarity is marked by a single cathode band near one end cap; during Zener operation, the banded end must be held positive relative to the opposite end.
Can the 1N5987UR/TR be used in high-reliability or aerospace applications?
Yes, the 1N5987UR/TR is available with screening levels compliant with MIL-PRF-19500 (JAN, JANTX, JANTXV, JANS) via prefix additions (e.g., MQ1N5987UR/TR). Its hermetic glass construction and radiation-hardened structure per MicroNote 050 support aerospace and defense deployment.
What is the maximum Zener current (IZM) for the 1N5987UR/TR at 3.0 V?
The maximum dc Zener current (IZM) for the 1N5987UR/TR is 167 mA, calculated from its 0.5 W power rating and upper-tolerance Zener voltage (3.15 V). This value ensures safe operation at full power without exceeding junction temperature limits on standard FR4 PCBs.
1N5987UR/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/TR FAQ
1.How can I place an order for 1N5987UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5987UR/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/TR reliable?
The price and inventory of 1N5987UR/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/TR is usually 5 days.
3.What payment methods are accepted for 1N5987UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5987UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5987UR/TR?
1N5987UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5987UR/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/TR?
For technical support, including 1N5987UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5987UR/TR requirements.
6.How does Aetrix verify that 1N5987UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5987UR/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/TR meets industry standards.
7.What is the process for return or replacement of 1N5987UR/TR?
All 1N5987UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5987UR/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/TR part is unused and in its original packaging.
Return procedure for 1N5987UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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