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Microchip Technology 1N4980US/TR
- Part No.:
- 1N4980US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
1N4980US/TR.pdf
- Description:
- DIODE ZENER 82V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:90
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Product details
Overview
1N4980US/TR from Microsemi is a surface-mount, voidless-hermetically-sealed glass Zener diode rated for 5 W power dissipation at TEC = 125 °C, with nominal Zener voltage of 82 V at 15 mA test current, ±5% tolerance, and dynamic impedance of 80 Ω at IZT. It serves as a precision voltage reference or overvoltage clamp in high-reliability aerospace, defense, and downhole instrumentation circuits.
For engineers reviewing the 1N4980US/TR datasheet, 1N4980US/TR pinout, 1N4980US/TR application, or 1N4980US/TR equivalent, this part delivers MIL-PRF-19500/356 qualified performance across –65 °C to +175 °C, with radiation-hardened construction, triple-layer passivation, and Category III metallurgical bonding - critical for mission-critical power regulation and protection designs.
Technical Context
This Zener operates in reverse breakdown with tightly controlled VZ regulation across 10–50% of IZM, exhibiting ΔVZ ≤ 6.6 V per Note 1. Its thermal resistance is 10 °C/W junction-to-end-cap, and it sustains 1.8 A surge current (8.3 ms square wave) without degradation.
The device uses tungsten slugs and copper end caps with Sn/Pb finish in an "E" (D-5B) package, marked with cathode band polarity. It is nonsensitive to ESD per MIL-STD-750 Method 1020 and inherently radiation-hard per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V at IZT = 15 mA - stable regulation point for high-voltage reference or clamping |
| Power Dissipation | 5 W @ TEC = 125 °C - requires heatsinking or thermal pad design for sustained operation |
| Dynamic Impedance (ZZT) | 80 Ω @ IZT - low AC impedance ensures minimal voltage variation under load transients |
| Max Reverse Leakage (IR) | 2 μA @ VR = 62.2 V - enables low-power standby regulation with negligible quiescent loss |
| Temp Coefficient (αVZ) | +0.100 %/°C - predictable positive drift supports temperature-compensated reference designs |
| Surge Current (IZSM) | 1.8 A (8.3 ms) - withstands transient overvoltage events without failure |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - supports bidirectional protection when used with series diodes or bridges |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (JEDEC D-5B), with copper end caps, Sn/Pb finish, and cathode indicated by band. Weight: 539 mg. Tape & reel compliant with EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input rail; regulates voltage by sinking current when VIN exceeds 82 V |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration - essential for >20-year field life in sealed systems |
| Category III metallurgical bond | Ensures mechanical integrity under thermal cycling and shock/vibe stress per MIL-PRF-19500/356 |
| Triple-layer passivation | Prevents surface leakage and contamination-induced parameter shift in humid or corrosive environments |
| Nonsensitive to ESD | Withstands >4 kV HBM without parameter shift - simplifies handling and assembly in uncontrolled environments |
| Inherent radiation hardness | No derating required up to 100 krad(Si); validated per Microsemi MicroNote 050 for space-grade applications |
Applications
| Avionics Power Monitoring | Downhole Telemetry Protection |
|---|---|
|
Use Scenario: Monitors 100 V DC bus in flight control electronics, triggering shutdown if voltage exceeds safe threshold. IC Role / Device Role / Timing Role: Shunt overvoltage protector placed across bus with series resistor. Use Value: 82 V Zener voltage provides 18 V margin above nominal 100 V bus, enabling reliable fault detection without false trips. |
Use Scenario: Clamps induced surges on RS-485 lines in oil/gas wellhead sensors operating at 125 °C ambient. IC Role / Device Role / Timing Role: Transient voltage suppressor in parallel with communication interface. Use Value: 175 °C max junction temperature and 1.8 A surge rating protect against lightning-induced spikes in harsh downhole environments. |
| Military Radar Bias Supply | Satellite Payload Reference |
|
Use Scenario: Stabilizes high-voltage bias for GaN RF amplifiers in ground-based radar transmitters. IC Role / Device Role / Timing Role: Precision voltage reference for analog feedback loop. Use Value: ±5% tolerance and +0.100 %/°C tempco enable stable gain control across –55 °C to +125 °C operational range. |
Use Scenario: Provides primary voltage reference for ADCs measuring solar array output in LEO satellites. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source. Use Value: Inherent TID hardness and no parameter shift after 100 krad(Si) exposure eliminate need for shielding or redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4980US | Same electrical specs and package, but supplied in bulk (not tape & reel); no TR suffix | Preferred for manual prototyping or low-volume hand-soldered assemblies | Select 1N4980US/TR for automated SMT placement; choose 1N4980US for bench evaluation or repair kits |
| 1N4980 | Axial-leaded through-hole variant (no "US" suffix); same VZ, IZT, and power rating | Used where board-level serviceability, higher creepage, or legacy footprint compatibility is required | Choose 1N4980 for through-hole designs or field-replaceable modules; 1N4980US/TR is strictly surface-mount |
Compared with 1N4980US and 1N4980, the 1N4980US/TR offers identical Zener characteristics and reliability but adds EIA-481-B tape-and-reel packaging for pick-and-place compatibility - critical for high-mix, low-volume aerospace production runs requiring traceability and zero static-sensitive handling.
Availability
1N4980US/TR is available at Aetrix Electronics and suitable for avionics power monitoring, downhole telemetry protection, and military radar bias supply requiring stable component supply with full traceability and long-term obsolescence management.
Supply support for 1N4980US/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and military-qualified components.
The 1N49xxUS series belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener family, engineered for extreme-environment voltage regulation where failure is not an option - including space, defense, and energy exploration systems.
FAQ
What is the Zener voltage tolerance for 1N4980US/TR?
The 1N4980US/TR has a standard ±5% Zener voltage tolerance at IZT = 15 mA, meaning its actual VZ falls between 77.9 V and 86.1 V. Tighter tolerances (±2% or ±1%) require C or D suffixes respectively - not applicable to the base 1N4980US/TR part number.
Does 1N4980US/TR meet MIL-PRF-19500/356 requirements?
Yes, the 1N4980US/TR is qualified to MIL-PRF-19500/356 as a JAN, JANTX, JANTXV, or JANS device depending on screening level. Its voidless-glass construction, Category III metallurgical bond, and triple-layer passivation satisfy all mandatory tests for high-reliability military applications.
What is the maximum operating temperature for 1N4980US/TR?
The 1N4980US/TR operates from –65 °C to +175 °C junction temperature. Its 5 W power rating is specified at TEC = 125 °C and must be linearly derated to zero at 175 °C - requiring careful thermal design in high-ambient environments.
Is 1N4980US/TR radiation-hardened?
Yes, the 1N4980US/TR is inherently radiation-hardened per Microsemi MicroNote 050, with no parameter degradation up to 100 krad(Si) total ionizing dose - making it suitable for satellite payload and nuclear instrumentation without additional shielding or derating.
What package type does 1N4980US/TR use?
The 1N4980US/TR uses the hermetically sealed "E" package (also known as D-5B), featuring voidless hard glass, tungsten slugs, copper end caps with Sn/Pb finish, and cathode identification via band. It is EIA-481-B tape-and-reel compatible.
1N4980US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 62.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
1N4980US/TR FAQ
1.How can I place an order for 1N4980US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4980US/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 1N4980US/TR reliable?
The price and inventory of 1N4980US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4980US/TR is usually 5 days.
3.What payment methods are accepted for 1N4980US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4980US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4980US/TR?
1N4980US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4980US/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 1N4980US/TR?
For technical support, including 1N4980US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4980US/TR requirements.
6.How does Aetrix verify that 1N4980US/TR is sourced from the original manufacturer or authorized distributors?
All 1N4980US/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 1N4980US/TR meets industry standards.
7.What is the process for return or replacement of 1N4980US/TR?
All 1N4980US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4980US/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 1N4980US/TR part is unused and in its original packaging.
Return procedure for 1N4980US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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