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Microchip Technology JANTX1N4984DUS/TR
- Part No.:
- JANTX1N4984DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4984DUS/TR.pdf
- Description:
- DIODE ZENER 120V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,053
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Product details
Overview
JANTX1N4984DUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount Zener diode with 120 V nominal zener voltage, ±1% tolerance (D suffix), 5 W power rating at 140 °C end-cap temperature, and 170 Ω dynamic impedance at 10 mA test current. It serves as a precision voltage reference and overvoltage clamp in high-reliability power regulation circuits for aerospace and defense systems.
For engineers reviewing the JANTX1N4984DUS/TR datasheet, JANTX1N4984DUS/TR pinout, JANTX1N4984DUS/TR application, or JANTX1N4984DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, voidless-glass construction, -65 °C to +175 °C operating range, and Category I metallurgical bond - critical for radiation-hardened and extended-temperature deployments.
Technical Context
This device operates in reverse breakdown mode with tightly controlled voltage regulation across 10%–50% of IZM (ΔVZ ≤ 10 V), enabling stable reference generation under varying load and thermal conditions. Its 170 Ω dynamic impedance at IZT = 10 mA ensures minimal output voltage deviation during transient current shifts.
The "D" suffix confirms ±1% zener voltage tolerance at 25 °C, and the "JANTX" grade certifies compliance with MIL-PRF-19500/356 screening including temperature cycling, hermeticity, and burn-in. The "US" suffix denotes the E-package (D-5B) surface-mount glass construction with tungsten slugs and Sn/Pb end caps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±1% at IZT = 10 mA - enables precise voltage clamping or reference in 115–125 V rail monitoring. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in high-ambient environments without derating below 140 °C. |
| Dynamic Impedance (ZZ) | 170 Ω @ IZT = 10 mA - limits output voltage shift to <1.7 V per 10 mA current change in regulation loop. |
| Max Reverse Leakage (IR) | 2 μA @ VR = 91.2 V - ensures negligible standby current in high-impedance bias networks. |
| Operating Temperature | -65 °C to +175 °C - validated for use in satellite power subsystems and engine-mounted avionics. |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal path to PCB copper pour or heatsink for sustained 5 W dissipation. |
| Surge Current (IZSM) | 1.0 A @ 8.3 ms - withstands lightning-induced transients per MIL-STD-461 CS115 without degradation. |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg, and EIA-481-B tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lowest potential node when used as shunt regulator. |
| Cathode | Zener breakdown terminal / high-side connection | Connected to regulated voltage node; band marking identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year reliability in vacuum or humid environments. |
| Category I metallurgical bond | Guarantees mechanical integrity under shock/vibration up to 100 g, required for launch vehicle electronics. |
| Triple-layer passivation | Prevents surface leakage and corrosion on glass body, maintaining IR stability after 1000-hr 85/85 environmental stress. |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift - simplifies handling in cleanroom assembly. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) ≥100 krad(Si), per MicroNote 050 - suitable for LEO satellite power management. |
Applications
| Aerospace Power Bus Monitoring | Defense Radar Bias Supply |
|---|---|
Use Scenario: Real-time detection of 115 VAC-derived DC bus overvoltage in satellite power distribution units. IC Role / Device Role / Timing Role: Shunt voltage clamp protecting downstream DC-DC converters from >130 V transients. Use Value: Maintains regulation within ±1.2 V over -55 °C to +125 °C ambient due to low αVZ (±0.085%/°C) and 170 Ω ZZ. |
Use Scenario: Stable 120 V reference for high-power RF amplifier bias sequencing in ground-based radar transmitters. IC Role / Device Role / Timing Role: Precision voltage reference for analog control loops requiring <0.1% long-term drift. Use Value: Delivers ±1% initial tolerance and <0.5% ΔVZ over 10–50% IZM, eliminating recalibration during field deployment. |
| Tactical Vehicle ECUs | Nuclear Instrumentation Systems |
Use Scenario: Overvoltage protection for 28 VDC vehicle bus during load-dump events in armored combat vehicles. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping spikes to ≤135 V before they reach microcontroller power rails. Use Value: Absorbs 1.0 A surge (8.3 ms) without parametric shift, validated per MIL-STD-1275B Appendix C. |
Use Scenario: Reference element in radiation-hardened neutron detector front-end amplifiers operating inside reactor containment. IC Role / Device Role / Timing Role: Stable bias source for charge-sensitive preamplifiers requiring ultra-low leakage and TID resilience. Use Value: 2 μA IR at 91.2 V and inherent TID hardness ensure signal integrity over 30-year service life without replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4984DUS/TR | Higher screening level (JANTXV vs JANTX): includes additional lot acceptance tests per MIL-PRF-19500/356 Table I. | Required for Class H (spaceflight) programs where zero-defect reliability is mandated. | Select JANTXV1N4984DUS/TR only if program spec explicitly requires JANTXV-level screening. |
| 1N4984DUS/TR (non-JAN) | No military qualification; commercial-grade screening, no MIL-PRF-19500/356 compliance. | Suitable for industrial test equipment or non-safety-critical instrumentation with lower reliability requirements. | Choose 1N4984DUS/TR only for cost-sensitive, non-military applications where MIL-spec is not contractually required. |
Compared with JANTX1N4984DUS/TR, JANTXV1N4984DUS/TR adds lot-level radiation testing and extended life testing but shares identical electrical specs and package; 1N4984DUS/TR omits all military screening yet retains same zener voltage and thermal performance for benign environments.
Availability
JANTX1N4984DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus monitoring, defense radar bias supply, and tactical vehicle ECU designs requiring stable component supply across extended product lifecycles and rigorous environmental qualification.
Supply support for JANTX1N4984DUS/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The JANTX1N4984DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener series, engineered specifically for mission-critical voltage regulation where failure is not an option - especially in space, avionics, and nuclear instrumentation.
FAQ
What is the zener voltage tolerance of JANTX1N4984DUS/TR?
JANTX1N4984DUS/TR has a nominal zener voltage of 120 V with ±1% tolerance at 25 °C, confirmed by the "D" suffix per Microsemi SD44A datasheet. This tight tolerance ensures predictable clamping behavior in precision reference circuits without post-manufacturing calibration. The JANTX1N4984DUS/TR maintains this specification across its full military temperature range when operated within rated power limits.
Does JANTX1N4984DUS/TR require derating above 140 °C?
Yes - JANTX1N4984DUS/TR is rated for 5 W dissipation only at end-cap temperature (TEC) ≤ 140 °C. Above that, power must be linearly derated to zero at 175 °C, yielding ~4.5 W at 150 °C and ~3.5 W at 165 °C. This derating curve is defined in the Maximum Ratings table of the SD44A datasheet and applies regardless of ambient temperature or airflow.
Is JANTX1N4984DUS/TR compatible with lead-free soldering processes?
No - JANTX1N4984DUS/TR features Sn/Pb (tin/lead) terminations per the datasheet, and its glass body is not qualified for peak reflow temperatures exceeding 220 °C. Lead-free assembly would risk thermal fracture of the voidless glass seal and void formation at the tungsten slug interface. Use only with Sn63/Pb37 solder profile and maximum 215 °C peak.
What does the "US" suffix indicate in JANTX1N4984DUS/TR?
The "US" suffix in JANTX1N4984DUS/TR designates the E-package (D-5B) surface-mount configuration: hermetically sealed voidless glass with tungsten slugs and Sn/Pb end caps. It distinguishes this version from axial-leaded equivalents (e.g., JANTX1N4984D) and confirms compatibility with SMT pick-and-place and reflow processes per EIA-481-B tape-and-reel standards.
How is cathode polarity marked on JANTX1N4984DUS/TR?
JANTX1N4984DUS/TR uses a visible band on the glass body to identify the cathode terminal, consistent with industry-standard diode marking. The band aligns with the cathode end cap, which connects to the higher-potential node in shunt regulation applications. No laser marking or alphanumeric codes are present - polarity verification relies solely on this band per the Mechanical and Packaging section of SD44A.
JANTX1N4984DUS/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:
- ±1%
- 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
JANTX1N4984DUS/TR FAQ
1.How can I place an order for JANTX1N4984DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4984DUS/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 JANTX1N4984DUS/TR reliable?
The price and inventory of JANTX1N4984DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4984DUS/TR is usually 5 days.
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JANTX1N4984DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4984DUS/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 JANTX1N4984DUS/TR?
For technical support, including JANTX1N4984DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4984DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4984DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4984DUS/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 JANTX1N4984DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4984DUS/TR?
All JANTX1N4984DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4984DUS/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 JANTX1N4984DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4984DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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