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Microchip Technology 1N5988UR-1/TR
- Part No.:
- 1N5988UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5988UR-1/TR.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,601
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Product details
Overview
1N5988UR-1/TR from Microsemi is a surface-mount 3.3 V, 5% tolerance Zener diode in DO-213AA (SOD80) MELF package, rated for 500 mW power dissipation at 25°C, with 95 mA test current, 2200 Ω dynamic impedance at IZT, and 25 µA max 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 1N5988UR-1/TR datasheet, 1N5988UR-1/TR pinout, 1N5988UR-1/TR application, or 1N5988UR-1/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (300 °C/W), RoHS compliance status, and DO-213AA package compatibility with automated SMT assembly.
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 = 3.3 V ±5%, and dynamic impedance ZZT = 2200 Ω - indicating moderate noise rejection and stable knee characteristics suitable for reference-grade biasing.
The 1N5988UR-1/TR exhibits a negative temperature coefficient of –0.060 %/°C, confirming its use in low-voltage stabilization where drift compensation is critical. Its minimal junction capacitance (typical <2 pF per Figure 2) supports high-frequency decoupling and fast transient response in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 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 power handling on FR4 board without derating |
| Dynamic Impedance (ZZT) | 2200 Ω at 95 mA - indicates voltage variation under load change; impacts regulation accuracy in varying-current applications |
| Reverse Leakage (IR) | 25 µA max at 1.0 V - ensures low standby current in battery-powered or high-impedance bias networks |
| Junction Temp Range | –65 to +175°C - enables operation in extended industrial and aerospace environments |
| Thermal Resistance (RθJA) | 300°C/W - determines temperature rise above ambient; guides heatsinking and layout for sustained power delivery |
Pinout & Package
DO-213AA (SOD80/MELF) glass package with two metallized end caps; cathode identified by single black band. No internal leads - terminals are symmetric end-cap contacts; polarity must be observed during placement (banded end = cathode = positive during Zener operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Connected to higher potential node; reverse-biased to enable breakdown regulation |
| Anode (unbanded end) | Zener cathode connection point | Connected to lower potential (e.g., ground or return path); completes regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables long-term reliability and moisture resistance without conformal coating in harsh environments |
| RoHS-compliant matte-tin plating | Supports lead-free reflow soldering (260°C, 10 s) while maintaining solderability per MIL-STD-750 |
| ESD immunity (MIL-STD-750, Method 1020) | Eliminates need for external ESD protection in handling-sensitive production lines |
| Inherent radiation hardness | Validated per MicroNote 050 - suitable for space-qualified or high-radiation terrestrial systems |
Applications
| Low-Voltage Reference Source | Overvoltage Clamp for MCU I/O |
|---|---|
Use Scenario: Providing stable 3.3 V bias to op-amp input stages or ADC reference dividers in portable instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC offset independent of supply ripple. Use Value: ±5% VZ tolerance and –0.060 %/°C TC ensure <±10 mV drift over 0–70°C, meeting 12-bit ADC reference stability requirements. | Use Scenario: Protecting 3.3 V GPIO pins of microcontrollers against transient surges from ESD or inductive switching. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursion to ≤3.6 V during fault events. Use Value: 25 µA leakage at 1.0 V minimizes quiescent loading; 2200 Ω ZZT ensures clamping voltage remains within safe logic thresholds during 1–10 ns transients. |
| Current-Source Bias Generator | Temperature-Compensated Sensor Excitation |
Use Scenario: Generating constant current for LED biasing or photodiode transimpedance amplifiers in optical sensors. IC Role / Device Role / Timing Role: Zener-based current source using series resistor and regulated VZ to set IOUT. Use Value: 95 mA IZT rating allows ≥10 mA output current with <2% regulation error across 5–30 V supply range. | Use Scenario: Supplying excitation current to platinum RTD bridges in industrial temperature transmitters. IC Role / Device Role / Timing Role: Stable voltage reference feeding precision current mirror with matched TC. Use Value: Negative TC (–0.060 %/°C) offsets positive TC of RTD bridge components, reducing net system drift by >40% versus uncompensated references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V3 | Same 3.3 V, 5% tolerance, but in DO-35 axial package; higher ZZT = 2500 Ω; no RoHS option in standard grade | Requires through-hole assembly; unsuitable for high-density SMT layouts or automated pick-and-place | Select when legacy through-hole design or manual prototyping is required; avoid for volume SMT production |
| MMBZ5226BS | SOT-23 package; same 3.3 V, 5%; lower PD = 300 mW; ZZT = 1500 Ω; RoHS standard | Lower power rating limits use in >15 mA regulation; smaller footprint enables ultra-compact designs | Select for space-constrained PCBs where power demand ≤10 mA; verify thermal margin on 1 oz Cu |
Compared with BZX55C3V3 and MMBZ5226BS, the 1N5988UR-1/TR uniquely combines SMT-compatible DO-213AA packaging, 500 mW rating, hermetic reliability, and radiation hardness - making it optimal for high-integrity, medium-power industrial and aerospace voltage reference designs.
Availability
1N5988UR-1/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and sensor excitation applications requiring stable component supply, consistent parametric performance, and long-term obsolescence resilience.
Supply support for 1N5988UR-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 defense, aerospace, and industrial markets.
The 1N5988UR-1/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered for mission-critical voltage regulation where long-term stability, hermetic integrity, and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5988UR-1/TR?
The 1N5988UR-1/TR has a Zener voltage tolerance of ±5% at 3.3 V, specified at IZT = 95 mA and 30°C lead temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0228-1 Rev. 1, and applies to commercial-grade units with 'B' suffix in the nomenclature.
Is the 1N5988UR-1/TR RoHS compliant?
Yes, the 1N5988UR-1/TR is RoHS compliant (e3 marking), as stated in the "PART NOMENCLATURE" section and confirmed in the FEATURES list on page 1 of T4-LDS-0228-1 Rev. 1. RoHS compliance applies only to commercial-grade versions; military-screened variants are not RoHS certified.
What package type does the 1N5988UR-1/TR use?
The 1N5988UR-1/TR uses the DO-213AA (also designated SOD80 or MELF) glass surface-mount package, as explicitly stated in the MECHANICAL and PACKAGING section on page 2 of T4-LDS-0228-1 Rev. 1. Its dimensions are 1.60–1.70 mm diameter and 3.30–3.70 mm length.
What is the maximum Zener current (IZM) for the 1N5988UR-1/TR?
The maximum Zener current IZM for the 1N5988UR-1/TR is 152 mA, calculated from PD = 0.5 W and VZM = 3.465 V (upper limit of 3.3 V ±5%). This value matches the "Max. dc Zener Current" entry for 1N5988BUR in the Electrical Characteristics table on page 3.
Does the 1N5988UR-1/TR have radiation-hardness certification?
Yes, the 1N5988UR-1/TR is inherently radiation hard, as documented in Microsemi MicroNote 050 referenced in the APPLICATIONS / BENEFITS section on page 1 of T4-LDS-0228-1 Rev. 1. This characteristic stems from its hermetic glass construction and silicon planar process, not requiring additional screening.
1N5988UR-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):
- 3.3 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-1/TR FAQ
1.How can I place an order for 1N5988UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5988UR-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 1N5988UR-1/TR reliable?
The price and inventory of 1N5988UR-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 1N5988UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5988UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5988UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5988UR-1/TR?
1N5988UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5988UR-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 1N5988UR-1/TR?
For technical support, including 1N5988UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5988UR-1/TR requirements.
6.How does Aetrix verify that 1N5988UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5988UR-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 1N5988UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5988UR-1/TR?
All 1N5988UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5988UR-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 1N5988UR-1/TR part is unused and in its original packaging.
Return procedure for 1N5988UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5988UR-1/TR Tags
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