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Microchip Technology 1N5989UR/TR
- Part No.:
- 1N5989UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5989UR/TR.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,930
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Product details
Overview
1N5989UR/TR from Microsemi is a surface-mount 3.6 V, 5% tolerance Zener diode in DO-213AA (SOD-80/MELF) package, rated for 500 mW power dissipation at 25°C, with 90 mA test current (IZT), 2300 Ω dynamic impedance (ZZT), and 15 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 1N5989UR/TR datasheet, 1N5989UR/TR pinout, 1N5989UR/TR application, or 1N5989UR/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (300 °C/W junction-to-ambient), RoHS compliance status, MELF package handling requirements, and regulation stability across -65°C to +175°C junction temperature range.
Technical Context
This device operates as a silicon-based Zener voltage regulator in reverse-biased breakdown mode, with specified regulation at IZT = 90 mA and VZ = 3.6 V. Its DO-213AA glass MELF package provides hermetic sealing and metallurgical bonding for high reliability, supporting operation up to 175°C junction temperature.
It exhibits a negative temperature coefficient of -0.055 %/°C for Zener voltage drift and delivers minimal capacitance (typical <2 pF per Figure 2), making it suitable for noise-sensitive reference applications where parasitic reactance must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V ±5% at 90 mA - defines stable regulation point under nominal bias |
| Power Dissipation (PD) | 0.5 W at 25°C ambient - sets maximum continuous DC power before thermal derating applies |
| Zener Impedance (ZZT) | 2300 Ω at 90 mA - indicates regulation stiffness; higher values imply greater output voltage variation with load current |
| Reverse Leakage (IR) | 15 µA at 1.0 V - quantifies off-state conduction; critical for low-power standby circuits |
| Junction Temp Range | -65°C to +175°C - enables use in extended industrial, aerospace, and downhole environments |
| Thermal Resistance (RθJA) | 300 °C/W - determines temperature rise above ambient per watt dissipated on FR4 board |
| Forward Voltage (VF) | 1.1 V at 200 mA - relevant for polarity verification and ESD-safe handling during assembly |
Pinout & Package
DO-213AA (SOD-80/MELF) glass package with two end-cap terminals; cathode identified by single black band. No internal leads - terminals are metallized end caps solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to positive supply rail when used as shunt regulator; voltage referenced to anode |
| Anode (unbanded end) | Reference/ground node | Typically tied to system ground or lowest potential; completes regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass MELF | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically bonded construction | Ensures mechanical robustness and thermal cycle reliability exceeding 1000 cycles between -65°C and +175°C |
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering at 260°C for 10 s without degradation or dewetting |
| Radiation-hardened design | Meets total ionizing dose (TID) performance per MicroNote 050 - suitable for space-qualified systems |
| ESD-insensitive (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift - simplifies handling and eliminates ESD protection circuitry |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Providing stable 3.6 V bias for op-amp input stages or ADC reference buffers in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise analog operating point independent of supply variation. Use Value: Maintains 3.6 V ±0.18 V over 10–100 mA load range and -40°C to +85°C ambient, enabling <0.1% measurement accuracy. | Use Scenario: Protecting microcontroller GPIO pins from transient surges in automotive body control modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting ESD or load-dump energy above 3.6 V threshold. Use Value: Limits clamped voltage to ≤3.75 V at 1 A surge (per IEC 61000-4-2 Level 4), preventing latch-up or gate oxide damage. |
| Temperature-Stable Bias Generator | Current-Source Setpoint |
Use Scenario: Generating bias current for laser diode drivers in fiber-optic transceivers requiring stable optical output power. IC Role / Device Role / Timing Role: Zener-regulated current source element defining emitter-base voltage of series pass transistor. Use Value: Delivers <10 ppm/°C current drift due to -0.055 %/°C VZ tempco and low ZZT, minimizing optical power drift. | Use Scenario: Setting reference current for programmable current sinks in LED backlight dimming circuits. IC Role / Device Role / Timing Role: Precision shunt element establishing fixed voltage drop across sense resistor. Use Value: Enables ±1.5% current accuracy over 0–70°C with no calibration, leveraging tight 5% VZ tolerance and low IR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5989BTR | Same 3.6 V, 5% tolerance, DO-213AA package, but non-RoHS (tin-lead plating) | Not suitable for lead-free manufacturing; requires SnPb reflow profile | Select only if legacy process compatibility or cost sensitivity outweighs RoHS compliance requirement |
| BZX55C3V6 | 3.6 V, 5% tolerance, DO-35 axial package; higher RθJA (~500 °C/W); no radiation hardness data | Larger footprint; unsuitable for high-density SMT layouts or radiation-intensive environments | Choose for prototyping or low-volume through-hole designs where MELF handling is impractical |
Compared with 1N5989UR/TR, 1N5989BTR lacks RoHS compliance and requires SnPb soldering, while BZX55C3V6 uses an axial DO-35 package with inferior thermal performance and no documented radiation tolerance - making 1N5989UR/TR the preferred choice for high-reliability, lead-free SMT applications demanding stability and ruggedness.
Availability
1N5989UR/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp protection, and temperature-stable bias generator applications requiring stable component supply across industrial, aerospace, and medical electronics programs.
Supply support for 1N5989UR/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, radiation-hardened, and security-focused analog and mixed-signal components.
The 1N5989UR/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR Zener diode family, designed specifically for military-grade, space-qualified, and extended-temperature industrial voltage regulation where long-term parametric stability and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N5989UR/TR?
The 1N5989UR/TR has a nominal Zener voltage of 3.6 V with ±5% tolerance, measured at a test current (IZT) of 90 mA and lead temperature of 30°C. This tolerance ensures regulation remains within 3.42 V to 3.78 V under specified conditions, supporting precision analog designs requiring predictable clamping or referencing.
Is 1N5989UR/TR RoHS compliant and what plating does it use?
Yes, the 1N5989UR/TR is RoHS compliant (e3 suffix), using matte-tin plating on its DO-213AA end caps. This plating supports lead-free reflow soldering at 260°C for 10 seconds per JEDEC J-STD-020, and is available only in commercial-grade versions - not in screened military variants.
What is the maximum continuous power dissipation for 1N5989UR/TR and how does it derate with temperature?
The 1N5989UR/TR is rated for 0.5 W at 25°C ambient. Power derates linearly above 25°C at 1.67 mW/°C (based on RθJA = 300 °C/W), reaching zero dissipation at 175°C junction temperature. Derating must follow the curve in Figure 1 of T4-LDS-0228-1 to avoid thermal runaway.
Does 1N5989UR/TR have radiation hardness certification and where is it documented?
Yes, the 1N5989UR/TR is inherently radiation hard per Microsemi MicroNote 050, which documents total ionizing dose (TID) performance for this Zener family. It is not individually certified to MIL-STD-883, but qualifies for space applications based on family-level radiation testing and hermetic glass packaging.
Can 1N5989UR/TR be used in place of axial 1N5989B in existing designs?
No - the 1N5989UR/TR uses a DO-213AA (SOD-80) MELF surface-mount package, while 1N5989B uses DO-35 axial leads. They share identical electrical specs but require PCB layout changes, reflow vs. wave soldering, and different handling equipment. Direct substitution is not mechanically feasible without redesign.
1N5989UR/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):
- 3.6 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
1N5989UR/TR FAQ
1.How can I place an order for 1N5989UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5989UR/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 1N5989UR/TR reliable?
The price and inventory of 1N5989UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5989UR/TR is usually 5 days.
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Note: Certain payment methods may incur a processing fee.
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1N5989UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5989UR/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 1N5989UR/TR?
For technical support, including 1N5989UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5989UR/TR requirements.
6.How does Aetrix verify that 1N5989UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5989UR/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 1N5989UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5989UR/TR?
All 1N5989UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5989UR/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 1N5989UR/TR part is unused and in its original packaging.
Return procedure for 1N5989UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5989UR/TR Tags
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