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Microchip Technology 1N5998UR/TR
- Part No.:
- 1N5998UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5998UR/TR.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,778
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Product details
Overview
1N5998UR/TR from Microsemi is a surface-mount 8.2 V, 5% tolerance Zener diode in DO-213AA (SOD-80) MELF package, rated for 500 mW power dissipation at 25°C, with 7.0 mA test current, 600 Ω dynamic impedance, and ±0.055%/°C temperature coefficient - used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5998UR/TR datasheet, 1N5998UR/TR pinout, 1N5998UR/TR application, or 1N5998UR/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (300°C/W junction-to-ambient), low leakage (<0.5 µA at 6.5 V), RoHS-compliant matte-tin plating, and MIL-PRF-19500 screening compatibility.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable output voltage across varying load and temperature conditions. It features metallurgically bonded internal construction, hermetically sealed glass encapsulation, and cathode polarity indicated by a band - requiring the banded end to be biased positive relative to the anode for regulation.
Designed for surface-mount assembly on FR4 PCBs with 1 oz copper, it delivers specified electrical performance only when mounted per recommended footprint (A=1.60–1.70 mm, B=3.30–3.70 mm). Its 150°C/W junction-to-end-cap thermal resistance enables reliable operation up to +175°C junction temperature under controlled thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±5% at 5.0 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 before thermal derating applies |
| Dynamic Impedance (ZZT) | 600 Ω at IZT = 5.0 mA - indicates voltage regulation stiffness; lower values yield tighter regulation under load transients |
| Reverse Leakage (IR) | <0.5 µA at 6.5 V - ensures minimal parasitic current draw in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.055 %/°C - quantifies voltage drift with temperature; positive sign means VZ increases as temperature rises |
| Junction Temperature Range | −65°C to +175°C - supports operation in extended industrial and aerospace environments |
| Package Type | DO-213AA (SOD-80) MELF - cylindrical glass surface-mount package enabling automated placement and high reliability |
Pinout & Package
DO-213AA (SOD-80) MELF package: hermetically sealed glass cylinder with tin-lead or RoHS-compliant matte-tin end-cap plating; cathode identified by single black band; no discrete pins - terminals are metallized end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Bias this terminal positive relative to anode to enable Zener breakdown and voltage clamping |
| Anode (unbanded end) | Reference ground node | Connected to circuit common or lower-potential rail; completes reverse-biased conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount DO-213AA package | Enables high-density PCB layouts and reflow-compatible assembly without axial lead trimming or bending |
| Metallurgically bonded construction | Ensures mechanical robustness and long-term parameter stability under thermal cycling and vibration |
| MIL-PRF-19500 screening option | Supports military/aerospace qualification paths via prefix-modified part numbers (e.g., MQ, MX, MV, CDS) |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and noise injection in high-frequency or RF-adjacent regulation circuits |
| Radiation-hardened design | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space-qualified systems |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Provides precise 8.2 V reference for TL431-like comparator inputs or shunt regulator feedback nodes. Use Value: Tight 5% tolerance and low tempco ensure stable output regulation across −40°C to +85°C ambient operating range. | Use Scenario: Supplies stable excitation voltage to bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: Acts as low-drift, low-noise voltage reference for ratiometric ADC front-ends. Use Value: 600 Ω dynamic impedance and sub-0.5 µA leakage preserve sensor bridge balance and measurement accuracy. |
| Overvoltage Protection Clamp | Programmable Logic Controller Input Conditioning |
Use Scenario: Clamps transient surges on 5–12 V DC input rails in motor drive control boards. IC Role / Device Role / Timing Role: Functions as passive crowbar element to limit voltage spikes above 8.2 V during ESD or inductive kick events. Use Value: Fast response in reverse breakdown and hermetic glass packaging ensure repeatable clamping without degradation. | Use Scenario: Conditions 24 V digital input signals to safe logic levels for microcontroller GPIO protection. IC Role / Device Role / Timing Role: Serves as level-shifting Zener clamp to reduce 24 V signals to ~8.2 V for optocoupler or Schmitt-trigger input stages. Use Value: DO-213AA package withstands industrial PCB cleaning solvents and thermal shock during rework cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5232B-TR | 3.3 V nominal, 5% tolerance, DO-35 axial package, 500 mW rating - different voltage and through-hole mounting | Used where board space allows axial leads and lower voltage reference is required | Select only if 3.3 V regulation and through-hole assembly are acceptable |
| BZX55-C8V2-TR | 8.2 V, 5% tolerance, DO-35 package, 500 mW - same voltage but axial-leaded; not surface-mount compatible | Suitable for prototyping or legacy designs using axial components | Choose only when DO-213AA MELF footprint is unavailable or reflow process is not supported |
Compared with 1N5998UR/TR, the 1N5232B-TR offers lower voltage and through-hole mounting, while BZX55-C8V2-TR matches voltage but lacks surface-mount capability - making 1N5998UR/TR the sole choice for space-constrained, high-reliability SMT designs requiring 8.2 V regulation.
Availability
1N5998UR/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage protection clamps, and PLC input conditioning requiring stable component supply and consistent parametric performance.
Supply support for 1N5998UR/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5998UR/TR belongs to Microsemi's legacy 1N5985BUR–1N6031BUR Zener series, designed specifically for precision voltage regulation in harsh-environment applications where stability, low leakage, and hermetic packaging are critical.
FAQ
What is the Zener voltage and tolerance of the 1N5998UR/TR?
The 1N5998UR/TR has a nominal Zener voltage of 8.2 V with a ±5% tolerance, measured at a test current of 5.0 mA. This means the actual regulation voltage falls between 7.79 V and 8.61 V under specified conditions, supporting designs requiring moderate precision without active compensation.
Is the 1N5998UR/TR RoHS compliant?
Yes, the 1N5998UR/TR is RoHS compliant (e3 suffix), featuring matte-tin end-cap plating. RoHS compliance applies only to commercial-grade versions; military-screened variants (e.g., MQ, MX prefixes) use tin-lead plating and are not RoHS compliant.
What package type does the 1N5998UR/TR use?
The 1N5998UR/TR uses the DO-213AA (also known as SOD-80 or MLL34) MELF package - a hermetically sealed glass cylindrical surface-mount device with metallized end caps, optimized for automated placement and high thermal reliability.
What is the maximum reverse leakage current for the 1N5998UR/TR?
The maximum reverse leakage current for the 1N5998UR/TR is 0.5 µA at 6.5 V, measured at 30°C lead temperature. This low leakage supports high-impedance bias networks and minimizes power loss in battery-powered or energy-sensitive applications.
Can the 1N5998UR/TR be used in high-temperature environments?
Yes, the 1N5998UR/TR is rated for junction and storage temperatures from −65°C to +175°C. When mounted per Microsemi's recommended FR4 footprint, it maintains specified performance up to +175°C junction temperature, making it suitable for under-hood automotive or industrial control applications.
1N5998UR/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):
- 8.2 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
1N5998UR/TR FAQ
1.How can I place an order for 1N5998UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5998UR/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 1N5998UR/TR reliable?
The price and inventory of 1N5998UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5998UR/TR is usually 5 days.
3.What payment methods are accepted for 1N5998UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5998UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5998UR/TR?
1N5998UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5998UR/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 1N5998UR/TR?
For technical support, including 1N5998UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5998UR/TR requirements.
6.How does Aetrix verify that 1N5998UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5998UR/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 1N5998UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5998UR/TR?
All 1N5998UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5998UR/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 1N5998UR/TR part is unused and in its original packaging.
Return procedure for 1N5998UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5998UR/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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MMSZ5231B-7-F
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onsemi
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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SMAZ12-13-F
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