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Microchip Technology JANTXV1N4984US/TR
- Part No.:
- JANTXV1N4984US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4984US/TR.pdf
- Description:
- DIODE ZENER 120V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,224
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Product details
Overview
JANTXV1N4984US/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 120 V ±5%, dynamic impedance of 170 Ω at 10 mA, and maximum reverse leakage current of 2 μA at 91.2 V. It serves as a precision voltage reference and overvoltage clamp in high-reliability military avionics power conditioning circuits.
For engineers reviewing the JANTXV1N4984US/TR datasheet, JANTXV1N4984US/TR pinout, JANTXV1N4984US/TR application, or JANTXV1N4984US/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, -65 °C to +175 °C operating temperature range, hermetic glass package with tungsten slugs, and 120 V regulation stability under wide current and thermal variation.
Technical Context
This device belongs to the 1N4954US–1N4996US family of military-grade Zener regulators, fabricated using triple-layer passivation and Category I internal metallurgical bonds. Its breakdown behavior is characterized by low dynamic impedance (170 Ω @ 10 mA) and tight voltage regulation (ΔVZ ≤ 10 V between 10% and 50% of IZM), enabling stable reference generation across load transients.
The JANTXV1N4984US/TR operates with forward voltage ≤1.50 V at 1.0 A and exhibits radiation hardness per MicroNote 050. Its thermal resistance is 10 °C/W junction-to-end-cap, and it supports surge current up to 1.00 A (8.3 ms square wave), making it suitable for transient suppression in hardened DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 120 V ±5% at IZT = 10 mA - defines precise clamping threshold for 120-V rail protection |
| Power Dissipation | 5 W @ TEC = 125 °C - sets maximum continuous thermal load without derating |
| Dynamic Impedance ZZ | 170 Ω @ IZT = 10 mA - ensures minimal output voltage shift under load current variation |
| Reverse Leakage IR | 2 μA max at VR = 91.2 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | -65 °C to +175 °C - enables deployment in jet engine bays and space-grade electronics |
| Surge Current IZSM | 1.00 A (8.3 ms square wave) - withstands lightning-induced transients per MIL-STD-461 |
| Thermal Resistance | 10 °C/W junction-to-end-cap - informs heatsink design for sustained 5-W operation |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs, "E" outline (also designated D-5B), cathode indicated by band, end caps copper with Sn/Pb finish, weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Must be routed to lowest-impedance ground plane to minimize noise coupling into regulation node |
| Cathode | Regulated voltage output terminal in reverse bias; marked by band on glass body | Serves as stable 120-V reference point; requires controlled trace width to manage surge current density |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates moisture ingress and long-term parameter drift in humid or vacuum environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability exceeding 1000 cycles (-65 °C/+175 °C) |
| MIL-PRF-19500/356 qualification (JANTXV grade) | Validated screening includes burn-in, temperature cycling, and lot acceptance testing per military standard |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands ≥8 kV HBM without parameter shift - simplifies handling in uncontrolled assembly areas |
| Radiation hardness (MicroNote 050) | Specified total ionizing dose tolerance ≥100 krad(Si) - qualified for low-earth orbit satellite subsystems |
Applications
| Aerospace Power Conditioning | Military Radar Bias Supply |
|---|---|
Use Scenario: Regulating auxiliary 120-V DC bus in airborne mission computers exposed to extreme thermal cycling and vibration. IC Role / Device Role / Timing Role: Zener diode acting as primary voltage reference and overvoltage clamp for DC-DC converter feedback loop. Use Value: Maintains ±0.6 V regulation accuracy across -55 °C to +125 °C ambient, preventing processor brownouts during rapid altitude changes. |
Use Scenario: Stabilizing high-voltage bias for GaN RF power amplifier stages in ground-based radar transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator providing fixed 120-V reference for gate driver ICs and current-sense amplifiers. Use Value: Delivers <2 μA leakage at 91.2 V, minimizing quiescent current error in millivolt-level current sensing paths. |
| Satellite Payload Voltage Reference | Nuclear Instrumentation Calibration |
Use Scenario: Generating stable 120-V reference for analog-to-digital converters in scientific payload telemetry systems. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source feeding precision DACs and op-amp gain-setting networks. Use Value: Retains <±1% VZ shift after 100 krad(Si) TID exposure, ensuring calibration integrity over multi-year missions. |
Use Scenario: Calibrating high-voltage test equipment used in reactor control rod monitoring systems. IC Role / Device Role / Timing Role: Primary 120-V standard in metrology-grade voltage divider chains requiring NIST-traceable stability. Use Value: Exhibits <0.01%/°C temperature coefficient and <10 ppm/h long-term drift, meeting ANSI C12.1 Class 0.1 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4983US/TR | 110 V nominal Zener voltage, 125 Ω ZZ, same package and rating | Used where 110-V clamping is required instead of 120 V; identical thermal and surge performance | Select when system nominal rail is 110 V ±10% and tighter regulation at lower voltage is needed |
| JANTXV1N4985US/TR | 130 V nominal Zener voltage, 190 Ω ZZ, same package and rating | Applied in 130-V intermediate bus architectures; higher VZ increases margin against overvoltage but raises leakage | Choose for 130-V systems requiring same reliability level but higher clamping threshold |
Compared with JANTXV1N4984US/TR, JANTXV1N4983US/TR provides 10 V lower regulation with slightly better impedance, while JANTXV1N4985US/TR trades 10 V higher clamping for increased leakage and impedance - all three share identical hermetic packaging, MIL-PRF-19500/356 screening, and thermal limits.
Availability
JANTXV1N4984US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military radar bias supply, and satellite payload voltage reference requiring stable component supply across extended temperature ranges and radiation environments.
Supply support for JANTXV1N4984US/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 core expertise in radiation-hardened and hermetic devices.
The JANTXV1N4984US/TR belongs to Microsemi's military-qualified Zener regulator product line, engineered specifically for fail-operational voltage reference and overvoltage protection in mission-critical systems where parameter stability under extreme stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTXV1N4984US/TR?
JANTXV1N4984US/TR has a nominal Zener voltage of 120 V with a standard tolerance of ±5%, consistent with MIL-PRF-19500/356 requirements for JANTXV-grade devices. This tolerance is measured at IZT = 10 mA and 25 °C, and remains stable across the full -65 °C to +175 °C operating range due to its Category I metallurgical bond and voidless glass construction. The JANTXV1N4984US/TR does not offer tighter tolerances like ±1% or ±2% - those are reserved for suffixes 'D' and 'C' in other family members.
Is JANTXV1N4984US/TR compatible with lead-free soldering processes?
JANTXV1N4984US/TR features end caps with tin/lead (Sn/Pb) finish and is specified for use with traditional eutectic solder reflow profiles. While the glass body and tungsten slugs tolerate peak temperatures up to 260 °C, the Sn/Pb termination is not compatible with lead-free (RoHS-compliant) soldering processes requiring >260 °C peak. For lead-free assembly, Microsemi recommends evaluating JANTXV1N4984US/TR's successor series or consulting Microchip's obsolescence roadmap for RoHS-qualified equivalents.
What is the maximum continuous Zener current for JANTXV1N4984US/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4984US/TR is 395 mA, calculated from its 5 W power rating and 120 V nominal Zener voltage (P = V × I). This value assumes operation at TEC = 125 °C; above this case temperature, linear derating applies down to zero at +175 °C. At 25 °C ambient with adequate heatsinking, JANTXV1N4984US/TR can sustain up to 417 mA before reaching thermal limit.
Does JANTXV1N4984US/TR have a documented radiation hardness specification?
Yes, JANTXV1N4984US/TR is documented as radiation-hardened per Microsemi MicroNote 050, specifying total ionizing dose (TID) tolerance of ≥100 krad(Si) with parametric shift within MIL-PRF-19500/356 limits. It also demonstrates enhanced displacement damage resistance due to its hermetic glass package and tungsten slug construction. These characteristics make JANTXV1N4984US/TR suitable for low-earth orbit satellite payloads and nuclear instrumentation applications where single-event effects and cumulative dose are critical concerns.
How is polarity identified on the JANTXV1N4984US/TR package?
Polarity on JANTXV1N4984US/TR is indicated by a visible cathode band on the hermetically sealed voidless glass body - the banded end is the cathode, and the unbanded end is the anode. This marking is consistent across all 1N4954US–1N4996US devices and aligns with JEDEC standard orientation for surface-mount Zeners. No additional marking (e.g., part number or date code) appears on the device per the datasheet, and the band must be verified optically prior to placement to avoid reverse-bias failure during power-up.
JANTXV1N4984US/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:
- ±5%
- 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
JANTXV1N4984US/TR FAQ
1.How can I place an order for JANTXV1N4984US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4984US/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 JANTXV1N4984US/TR reliable?
The price and inventory of JANTXV1N4984US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4984US/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4984US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4984US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4984US/TR?
JANTXV1N4984US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4984US/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 JANTXV1N4984US/TR?
For technical support, including JANTXV1N4984US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4984US/TR requirements.
6.How does Aetrix verify that JANTXV1N4984US/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4984US/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 JANTXV1N4984US/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4984US/TR?
All JANTXV1N4984US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4984US/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 JANTXV1N4984US/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4984US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4984US/TR Tags
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