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Microchip Technology 1N5988UR/TR
- Part No.:
- 1N5988UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5988UR/TR.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,345
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Product details
Overview
1N5988UR/TR from Microsemi is a surface-mount 500 mW Zener diode with nominal Zener voltage 3.3 V, ±5% tolerance (B-suffix), 95 mA test current (IZT), and 2200 Ω dynamic impedance (ZZT) at IZT. It regulates voltage in low-power reference and protection circuits across industrial and telecom power rails.
For engineers reviewing the 1N5988UR/TR datasheet, 1N5988UR/TR pinout, 1N5988UR/TR application, or 1N5988UR/TR equivalent, this page delivers verified package dimensions, thermal resistance (RθJA = 300 °C/W), junction temperature range (–65 to +175 °C), reverse leakage (25 µA @ 1.0 V), and RoHS-compliant commercial-grade availability.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with regulation specified at 95 mA test current and 3.3 V nominal output. Its DO-213AA (SOD80/MLL34) MELF glass package enables stable thermal performance and minimal parasitic capacitance (typical <2 pF).
Designed for commercial-grade reliability, it features internal metallurgical bonds, cathode band polarity marking, and compatibility with EIA-481-B 12 mm tape-and-reel packaging (TR suffix). It meets MIL-PRF-19500 screening levels when ordered with appropriate prefixes but the 1N5988UR/TR variant is non-military, RoHS-compliant, and rated for 0.5 W at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V ±5% at 95 mA - defines precise regulation point for low-voltage reference design |
| Power Dissipation (PD) | 0.5 W at 25 °C ambient - sets maximum continuous power handling on FR4 board |
| Dynamic Impedance (ZZT) | 2200 Ω at 95 mA - indicates voltage stability under small-signal AC ripple superimposed on DC bias |
| Reverse Leakage (IR) | 25 µA max at 1.0 V - ensures low standby current in undervoltage detection or clamp circuits |
| Junction Temperature Range | –65 to +175 °C - supports operation in extended industrial and automotive under-hood environments |
| Thermal Resistance (RθJA) | 300 °C/W - determines temperature rise above ambient per watt dissipated on standard FR4 layout |
| Forward Voltage (VF) | 1.1 V max at 200 mA - relevant for forward-conduction clamping or ESD protection path analysis |
Pinout & Package
DO-213AA (SOD80 / MLL34) MELF glass package: hermetically sealed cylindrical body with tin-lead or matte-tin end-cap plating; cathode indicated by single black band; polarity: banded end is cathode (positive during Zener operation); weight: 0.04 g; tape-and-reel compliant per EIA-481-B (12 mm carrier).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node in Zener regulation; carries full reverse current during breakdown |
| Cathode | Banded end | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA package | Enables automated placement and reflow compatibility while maintaining hermetic glass reliability |
| 1.1 V forward voltage at 200 mA | Supports bidirectional transient suppression when used with series resistor or in back-to-back configuration |
| Non-sensitive to ESD (MIL-STD-750, Method 1020) | Eliminates need for external ESD protection in board-level handling and low-energy interface circuits |
| Inherently radiation-hardened | Validated per Microsemi MicroNote 050 - suitable for space-qualified or high-altitude avionics applications |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU without exemption; matte-tin plating replaces lead-based solderability layer |
Applications
| Low-Voltage Power Rail Clamp | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Clamping 3.3 V I/O rail against overvoltage transients in industrial PLC modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground. Use Value: Maintains rail within ±5% of 3.3 V using 95 mA IZT and 2200 Ω ZZT, limiting voltage excursion during 100 ns EFT bursts. |
Use Scenario: Providing stable reset threshold for ARM Cortex-M0+ microcontrollers in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in supervisor IC or discrete reset circuit. Use Value: Delivers 3.3 V ±5% regulation with <25 µA leakage at 1.0 V, minimizing quiescent current in always-on monitoring paths. |
| Temperature-Stable Bias Generator | ESD-Safe Signal Line Protector |
|
Use Scenario: Generating bias voltage for op-amp input stages in wide-temperature-range instrumentation amplifiers. IC Role / Device Role / Timing Role: Low-drift Zener reference with +0.060 %/°C tempco, stabilized via thermal coupling to PCB copper pour. Use Value: Achieves <±10 mV drift over –40 to +85 °C due to predictable αVZ and low RθJA (300 °C/W) on FR4. |
Use Scenario: Protecting RS-485 transceiver inputs from human-body-model (HBM) ESD events in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional clamp formed with series resistor and second Zener; leverages inherent ESD immunity (MIL-STD-750 Method 1020). Use Value: Withstands >8 kV HBM without parameter shift, confirmed by non-sensitivity testing-no additional TVS required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5226B-T | Same 3.3 V ±5%, but DO-35 axial package; 500 mW rating; 25 µA IR @ 1.0 V; ZZT = 28 Ω @ 20 mA (lower impedance, lower test current) | Requires through-hole assembly; better for prototyping or low-volume repair; unsuitable for high-density SMT layouts | Select when manual assembly or legacy footprint compatibility is required; not drop-in for DO-213AA land patterns |
| BZX55C3V3 | 3.3 V ±5%, DO-35 package; 500 mW; 25 µA IR @ 1.0 V; ZZT = 95 Ω @ 5 mA; Pro Electron spec; no radiation hardness documentation | Common European alternative; lacks MIL-PRF-19500 screening path and radiation hardening validation | Choose for cost-sensitive commercial designs where radiation tolerance and military screening are not required |
Compared with 1N5988UR/TR, the 1N5226B-T offers lower dynamic impedance but requires PCB redesign for axial mounting, while BZX55C3V3 provides equivalent voltage specs without radiation assurance or SMT optimization-making 1N5988UR/TR optimal for high-reliability, space-constrained, and radiation-aware applications.
Availability
1N5988UR/TR is available at Aetrix Electronics and suitable for low-power voltage reference, industrial sensor biasing, and telecom power rail clamping requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5988UR/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 1N5988UR/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR family of surface-mount Zener regulators, engineered for stable voltage reference in harsh environments where hermetic sealing, ESD immunity, and temperature resilience are critical.
FAQ
What is the Zener voltage tolerance of the 1N5988UR/TR?
The 1N5988UR/TR has a nominal Zener voltage of 3.3 V with ±5% tolerance, denoted by the "B" suffix in its part number per Microsemi's nomenclature. This means the actual measured VZ falls between 3.135 V and 3.465 V when tested at 95 mA (IZT) and 30 °C lead temperature, as confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0228-1 Rev. 1.
Is the 1N5988UR/TR RoHS compliant?
Yes, the 1N5988UR/TR is RoHS compliant, indicated by the "e3" designation in its full part nomenclature. Per the datasheet, RoHS versions use matte-tin end-cap plating and are available only in commercial-grade variants-this applies directly to the 1N5988UR/TR, which carries no military prefix and ships in EIA-481-B tape-and-reel packaging.
What is the maximum reverse leakage current for the 1N5988UR/TR?
The maximum reverse leakage current (IR) for the 1N5988UR/TR is 25 µA at 1.0 V applied reverse voltage and 30 °C lead temperature, as specified in the Electrical Characteristics table. This value is valid for the "B,C,D" tolerance group (±5%, ±2%, ±1%), confirming consistent leakage behavior across tighter-tolerance variants of the same voltage grade.
Does the 1N5988UR/TR have radiation-hardened properties?
Yes, the 1N5988UR/TR is inherently radiation-hardened, as documented in Microsemi MicroNote 050 and referenced in the Applications/Benefits section of the datasheet. This characteristic stems from its glass-encapsulated DO-213AA construction and internal metallurgical bonding-not dependent on screening level-and applies to the commercial 1N5988UR/TR variant.
What is the thermal resistance junction-to-ambient for the 1N5988UR/TR?
The thermal resistance junction-to-ambient (RθJA) for the 1N5988UR/TR is 300 °C/W when mounted on a standard FR4 printed circuit board with 1 oz copper and the recommended footprint, as stated in the Maximum Ratings table on page 1 of T4-LDS-0228-1 Rev. 1. This value assumes natural convection cooling and defines allowable power derating above 25 °C ambient.
1N5988UR/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):
- 3.3 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
1N5988UR/TR FAQ
1.How can I place an order for 1N5988UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5988UR/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 1N5988UR/TR reliable?
The price and inventory of 1N5988UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5988UR/TR is usually 5 days.
3.What payment methods are accepted for 1N5988UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5988UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5988UR/TR?
1N5988UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5988UR/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 1N5988UR/TR?
For technical support, including 1N5988UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5988UR/TR requirements.
6.How does Aetrix verify that 1N5988UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5988UR/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 1N5988UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5988UR/TR?
All 1N5988UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5988UR/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 1N5988UR/TR part is unused and in its original packaging.
Return procedure for 1N5988UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5988UR/TR Tags
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