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Microchip Technology 1N4983US/TR
- Part No.:
- 1N4983US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
1N4983US/TR.pdf
- Description:
- DIODE ZENER 110V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:94
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Product details
Overview
1N4983US/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 110 V at 12 mA test current, ±5% tolerance, and maximum dynamic impedance of 125 Ω at IZT. It serves as a precision voltage reference or overvoltage clamp in high-reliability military and aerospace power regulation circuits.
For engineers reviewing the 1N4983US/TR datasheet, 1N4983US/TR pinout, 1N4983US/TR application, or 1N4983US/TR equivalent, key selection criteria include its hermetic glass construction, -65 °C to +175 °C operating temperature range, radiation-hardened behavior per MicroNote 050, and compliance with MIL-PRF-19500/356 for JAN/JANTXV grades.
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable voltage across wide current (10%–50% of IZM) and temperature ranges. Its voidless-glass package with tungsten slugs and copper end caps enables low thermal resistance (10 °C/W junction-to-end-cap) and robust surge handling (1.2 A @ 8.3 ms).
The 1N4983US/TR exhibits a Zener voltage temperature coefficient of +0.100 %/°C at IZT, reverse leakage ≤2 μA at 83.6 V, and forward voltage ≤1.50 V at 1.0 A - confirming suitability for bidirectional protection and reference stability in harsh-environment analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 110 V at IZT = 12 mA - defines precise clamping/reference level under standard bias |
| Power Dissipation | 5 W @ TEC = 125 °C - sets maximum continuous thermal load before derating begins |
| Dynamic Impedance (ZZ) | 125 Ω at IZT - determines voltage regulation sensitivity to current variation |
| Max Reverse Leakage (IR) | 2 μA at VR = 83.6 V - ensures minimal parasitic current in standby or high-impedance nodes |
| Operating Temperature | -65 °C to +175 °C - supports deployment in extended-range avionics, downhole, and space-grade systems |
| Surge Current (IZSM) | 1.2 A (8.3 ms square wave) - enables transient overvoltage suppression without failure |
| Forward Voltage (VF) | 1.50 V at 1.0 A - confirms low-loss conduction in bidirectional protection configurations |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" or "D-5B") with copper end caps (Sn/Pb finish), cathode indicated by band. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in Zener clamp | Connected to circuit ground or lower-potential rail during reverse-bias regulation |
| Cathode | Zener breakdown terminal / high-side connection | Marked with band; tied to regulated node or input rail requiring voltage stabilization |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture ingress, enabling >20-year field reliability in sealed enclosures |
| Triple-layer passivation | Prevents surface degradation under high-humidity or ionizing radiation exposure |
| Category III metallurgical bond | Ensures mechanical integrity of internal junction under thermal cycling and vibration stress (per MIL-PRF-19500/356) |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Radiation hardness | Qualified per Microsemi MicroNote 050 for total ionizing dose (TID) tolerance up to 100 krad(Si) |
Applications
| Aerospace Power Conditioning | Military Avionics Reference |
|---|---|
Use Scenario: Stabilizing 110 V DC bus in satellite power distribution units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream DC-DC converters. Use Value: Maintains regulation within ±5% across -65 °C to +175 °C while surviving 100 krad(Si) TID exposure. |
Use Scenario: Providing primary voltage reference for analog-to-digital conversion in fighter jet flight control sensors. IC Role / Device Role / Timing Role: Precision Zener shunt regulator establishing stable 110 V reference for ADC biasing. Use Value: Delivers <2 μA leakage at 83.6 V, minimizing offset error in high-resolution sensor signal chains. |
| Downhole Oilfield Instrumentation | Radiation-Hardened Test Equipment |
Use Scenario: Overvoltage protection on 110 V excitation lines for pressure transducers in deep-well drilling tools. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 8.3 ms surges up to 1.2 A without degradation. Use Value: Survives repeated 1.2 A surge events at 175 °C ambient due to 10 °C/W thermal resistance and hermetic seal. |
Use Scenario: Calibrating high-voltage test fixtures used in nuclear facility instrumentation labs. IC Role / Device Role / Timing Role: Stable 110 V reference source traceable to NIST standards via certified calibration. Use Value: Exhibits +0.100 %/°C tempco and <125 Ω dynamic impedance, enabling sub-0.1% reference drift over lab temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4983US | Same electrical specs and package, but supplied in bulk (not tape-and-reel); no TR suffix | Preferred for manual prototyping or low-volume hand-soldered assemblies | Select 1N4983US/TR for automated SMT placement; choose 1N4983US for bench evaluation or repair kits |
| 1N4982US/TR | 100 V nominal Zener voltage (vs. 110 V), otherwise identical package, power rating, and qualification | Suitable where system margin allows 10 V lower clamping threshold | Use 1N4982US/TR only if design tolerates 100 V regulation; verify stability at reduced VZ under same IZ conditions |
Compared with 1N4983US/TR, the 1N4983US lacks tape-and-reel packaging for SMT line integration, while 1N4982US/TR shifts regulation to 100 V - requiring revalidation of overvoltage thresholds and thermal margin in the target circuit.
Availability
1N4983US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military avionics reference, and downhole oilfield instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4983US/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) designs high-reliability analog and mixed-signal semiconductors for defense, aerospace, and industrial markets, with emphasis on radiation-hardened and extended-temperature components.
The 1N4983US/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener series, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for 1N4983US/TR?
The 1N4983US/TR has a standard ±5% Zener voltage tolerance at IZT = 12 mA, meaning its actual breakdown voltage falls between 104.5 V and 115.5 V under nominal test conditions. Tighter tolerances (±2%, ±1%) require different suffixes (C or D) not present in the TR-marked part number.
Is 1N4983US/TR compatible with lead-free soldering processes?
The 1N4983US/TR features copper end caps with Sn/Pb finish, making it incompatible with Pb-free reflow profiles. For RoHS-compliant assembly, Microsemi offers alternative qualified parts - the 1N4983US/TR itself requires traditional 217 °C peak profile with controlled time-above-liquidus to avoid end-cap delamination.
Does 1N4983US/TR meet MIL-PRF-19500/356 requirements?
Yes - the 1N4983US/TR is manufactured to MIL-PRF-19500/356 Class JANTXV specifications, including Category III metallurgical bonds, triple-layer passivation, and full screening per MIL-STD-750 and MIL-STD-883. Full qualification data is documented in Microsemi SD44A Rev E.
What is the maximum continuous Zener current for 1N4983US/TR?
The maximum continuous Zener current (IZM) for 1N4983US/TR is 1.2 A at TEC = 125 °C, derived from its 5 W power rating and 110 V nominal voltage (IZM = PD/VZ). This value decreases linearly above 125 °C, reaching zero at 175 °C per the specified derating curve.
Can 1N4983US/TR be used in bidirectional protection circuits?
Yes - the 1N4983US/TR supports bidirectional operation: its forward voltage is rated ≤1.50 V at 1.0 A, allowing use as a low-drop rectifier or clamping diode in series with the Zener function. However, forward conduction must remain within absolute maximum ratings to avoid thermal runaway.
1N4983US/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):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 83.6 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
1N4983US/TR FAQ
1.How can I place an order for 1N4983US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4983US/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 1N4983US/TR reliable?
The price and inventory of 1N4983US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4983US/TR is usually 5 days.
3.What payment methods are accepted for 1N4983US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4983US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4983US/TR?
1N4983US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4983US/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 1N4983US/TR?
For technical support, including 1N4983US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4983US/TR requirements.
6.How does Aetrix verify that 1N4983US/TR is sourced from the original manufacturer or authorized distributors?
All 1N4983US/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 1N4983US/TR meets industry standards.
7.What is the process for return or replacement of 1N4983US/TR?
All 1N4983US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4983US/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 1N4983US/TR part is unused and in its original packaging.
Return procedure for 1N4983US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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