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Microchip Technology JANTX1N4984CUS/TR
- Part No.:
- JANTX1N4984CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4984CUS/TR.pdf
- Description:
- DIODE ZENER 120V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,485
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Product details
Overview
JANTX1N4984CUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 120 V ±2% (C suffix), dynamic impedance of 170 Ω at 10 mA test current, and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability power regulation circuits.
For engineers reviewing the JANTX1N4984CUS/TR datasheet, JANTX1N4984CUS/TR pinout, JANTX1N4984CUS/TR application, or JANTX1N4984CUS/TR equivalent, this part is selected for mission-critical analog voltage stabilization where radiation hardness, ESD immunity per MIL-STD-750 Method 1020, and voidless-glass hermeticity are mandatory design requirements.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family and uses Category I internal metallurgical bonds for mechanical robustness and thermal stability. Its voidless hard-glass package with tungsten slugs and copper end caps enables reliable operation under extreme thermal cycling and shock conditions.
The JANTX1N4984CUS/TR exhibits a Zener voltage temperature coefficient of +0.100 %/°C at 10 mA, reverse leakage current ≤2 μA at 91.2 V, and surge current rating of 1.0 A for 8.3 ms square wave - characteristics validated across –65 °C to +175 °C storage and operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±2% at 10 mA - tight tolerance enables stable reference in precision power supplies |
| Power Dissipation | 5 W @ TEC = 140 °C - defines maximum continuous thermal load before derating begins |
| Dynamic Impedance (ZZ) | 170 Ω @ IZT = 10 mA - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage (IR) | ≤2 μA @ VR = 91.2 V - guarantees negligible standby current in high-impedance bias networks |
| Operating Temperature | –65 °C to +175 °C - supports deployment in aerospace, downhole, and defense electronics without derating |
| Thermal Resistance (RθJC) | 7 °C/W junction-to-end-cap - enables predictable thermal modeling for PCB pad design and heatsinking |
| Surge Current (IZSM) | 1.0 A @ 8.3 ms - withstands transient overvoltage events such as EFT or inductive switching spikes |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with copper end caps having Sn/Pb finish; cathode indicated by band; polarity critical for correct biasing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener knee reference | Connected to lower-potential node; must be held ≤0.7 V below cathode to avoid forward conduction |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential node; delivers stable 120 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk under thermal stress and long-term humidity exposure |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle reliability exceeding 1000 cycles between –65 °C and +175 °C |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Permits handling without special static control in cleanroom or field repair environments |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for total ionizing dose (TID) up to 100 krad(Si) |
| Triple-layer passivation | Prevents surface leakage and parameter drift in high-humidity or contaminated atmospheres |
Applications
| Aerospace Power Conditioning | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Regulating auxiliary supply rails in satellite power management units exposed to vacuum and wide thermal swings. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream DC-DC converters. Use Value: Maintains 120 V regulation within ±2% across –65 °C to +175 °C, eliminating need for active compensation circuitry. |
Use Scenario: Providing stable bias voltage for sensor front-ends in oil/gas well logging tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: Precision shunt reference enabling accurate analog-to-digital conversion of pressure/temperature signals. Use Value: Delivers <2 μA leakage at 91.2 V even after 1000 thermal cycles, preserving measurement accuracy over tool lifetime. |
| Defense Avionics Overvoltage Protection | Nuclear Facility Monitoring Systems |
Use Scenario: Clamping transient surges on 115 VAC-derived DC bus in fighter jet flight control systems. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing 1.0 A surge for 8.3 ms without degradation. Use Value: Survives repeated lightning-induced transients per DO-160 Section 22, Class A, due to voidless-glass ruggedness. |
Use Scenario: Stabilizing reference voltage for radiation-hardened data acquisition modules in reactor containment zones. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference maintaining calibration under 100 krad(Si) total ionizing dose. Use Value: No parametric shift observed after irradiation, per MicroNote 050, ensuring long-term metrological traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4984CUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 | Required for space-grade or nuclear-qualified programs demanding extended burn-in and radiation lot acceptance | Select JANTXV1N4984CUS/TR only when program spec mandates JANTXV-level qualification |
| 1N4984CUS/TR | Commercial-grade version; no MIL-PRF-19500/356 qualification; same electrical specs and package | Suitable for non-military industrial systems where radiation hardness and ESD immunity are not required | Choose 1N4984CUS/TR for cost-sensitive terrestrial applications with standard reliability requirements |
Compared with JANTX1N4984CUS/TR, the JANTXV variant adds process controls for space-level reliability but increases cost and lead time, while the commercial 1N4984CUS/TR retains identical Zener performance but lacks military screening - making the JANTX grade optimal for defense and high-reliability industrial use cases.
Availability
JANTX1N4984CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation reference, and defense avionics overvoltage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4984CUS/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 aerospace, defense, and industrial markets, with emphasis on radiation-hardened and hermetically sealed components.
The JANTX1N4984CUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode product line, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTX1N4984CUS/TR?
JANTX1N4984CUS/TR has a Zener voltage tolerance of ±2%, indicated by the "C" suffix in the part number. This corresponds to a nominal 120 V Zener voltage ranging from 117.6 V to 122.4 V at 10 mA test current, verified per MIL-PRF-19500/356 screening requirements. The JANTX1N4984CUS/TR maintains this tolerance across its full operating temperature range.
Does JANTX1N4984CUS/TR require heatsinking in 5 W operation?
JANTX1N4984CUS/TR is rated for 5 W power dissipation only at an end-cap temperature (TEC) of 140 °C; operation above that requires linear derating to zero at 175 °C. Because its thermal resistance is 7 °C/W junction-to-end-cap, effective PCB copper area acting as a heatsink is essential - typical designs use ≥1 in² of 2-oz copper connected directly to both end caps to sustain full 5 W without exceeding limits.
Is JANTX1N4984CUS/TR compatible with lead-free reflow processes?
JANTX1N4984CUS/TR features Sn/Pb-finished copper end caps and is specified for soldering using eutectic tin-lead processes per MIL-STD-202. While it may survive lead-free reflow (peak ~260 °C), Microsemi does not qualify or guarantee performance under Pb-free thermal profiles; use requires validation per J-STD-020 and is not recommended for new designs targeting RoHS compliance.
How does the radiation hardness of JANTX1N4984CUS/TR compare to commercial Zeners?
JANTX1N4984CUS/TR demonstrates inherent radiation hardness validated per Microsemi MicroNote 050, showing no parametric degradation up to 100 krad(Si) total ionizing dose. Commercial Zeners (e.g., 1N4984CUS/TR) lack this characterization and typically exhibit significant VZ shift and increased leakage above 10 krad(Si), making JANTX1N4984CUS/TR uniquely suitable for nuclear or space radiation environments.
Can JANTX1N4984CUS/TR be used in series or parallel configurations?
JANTX1N4984CUS/TR is not designed for parallel operation due to mismatched Zener voltage temperature coefficients (+0.100 %/°C) and dynamic impedances, which cause current hogging. Series connection is permissible for higher voltage references, but each device must be individually current-limited; the JANTX1N4984CUS/TR datasheet does not specify matched binning for series use.
JANTX1N4984CUS/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):
- 120 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 91.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTX1N4984CUS/TR FAQ
1.How can I place an order for JANTX1N4984CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4984CUS/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 JANTX1N4984CUS/TR reliable?
The price and inventory of JANTX1N4984CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4984CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4984CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4984CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4984CUS/TR?
JANTX1N4984CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4984CUS/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 JANTX1N4984CUS/TR?
For technical support, including JANTX1N4984CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4984CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4984CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4984CUS/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 JANTX1N4984CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4984CUS/TR?
All JANTX1N4984CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4984CUS/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 JANTX1N4984CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4984CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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