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Microchip Technology JANTX1N4986CUS/TR
- Part No.:
- JANTX1N4986CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4986CUS/TR.pdf
- Description:
- DIODE ZENER 150V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
JANTX1N4986US/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 a nominal Zener voltage of 150 V ±5%, dynamic impedance of 330 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 aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4986US/TR datasheet, JANTX1N4986US/TR pinout, JANTX1N4986US/TR application, or JANTX1N4986US/TR equivalent, this part is selected for mission-critical voltage regulation where hermetic sealing, radiation tolerance, wide thermal stability, and MIL-PRF-19500/356 qualification are mandatory design requirements.
Technical Context
This device operates in reverse breakdown mode with a specified Zener voltage of 150 V at IZT = 8 mA, exhibiting a maximum dynamic impedance of 330 Ω at that current and 1.5 Ω at IZK = 1 mA. Its temperature coefficient is +0.105 %/°C, indicating positive drift with rising temperature.
The diode uses voidless hard-glass encapsulation with tungsten slugs and copper end caps finished in Sn/Pb, achieving thermal resistance of 7 °C/W (junction-to-end-cap) and surge capability of 0.75 A at 8.3 ms. It complies with MIL-STD-750 Method 1020 for ESD robustness and is inherently radiation-hardened per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 150 V ±5% at IZT = 8 mA - defines stable regulation point under nominal bias |
| Power Dissipation | 5 W @ TEC = 140 °C - sets maximum continuous thermal load on PCB mount |
| Dynamic Impedance ZZ | 330 Ω @ IZT = 8 mA - determines output voltage variation under load transients |
| Max Reverse Leakage | 2 μA @ VR = 114 V - ensures minimal parasitic current in standby clamping |
| Junction Temperature Range | –65 °C to +175 °C - enables operation in extreme environmental conditions without derating |
| Forward Voltage | 1.50 V @ 1.0 A - defines conduction loss during forward-biased fault events |
| Surge Current | 0.75 A @ 8.3 ms - supports transient overvoltage suppression without failure |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), surface-mount, with cathode indicated by band. End caps are copper with Sn/Pb finish; weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during normal Zener operation; carries full surge current in forward fault |
| Cathode | Zener breakdown terminal | Connected to regulated voltage rail; polarity marked by band; defines reference node for voltage stabilization |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion, enabling >20-year field life in sealed avionics enclosures |
| MIL-PRF-19500/356 qualification (JANTX) | Validated screening including burn-in, temperature cycling, and lot acceptance testing per military standard |
| Triple-layer passivation | Reduces surface leakage paths and enhances long-term parameter stability under humidity and bias stress |
| Category I metallurgical bond | Ensures mechanical integrity of internal die attach across thermal shock cycles from –65 °C to +175 °C |
| Inherent radiation hardness | No degradation in VZ or IR up to 100 krad(Si) total ionizing dose, per MicroNote 050 |
Applications
| Aerospace Power Bus Regulation | Satellite Payload Voltage Reference |
|---|---|
|
Use Scenario: Stabilizing 150 V primary bus in LEO satellite power distribution units under thermal vacuum and radiation exposure. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage regulator and overvoltage clamp for DC-DC converter feedback loop. Use Value: Maintains ±0.75 V regulation accuracy over –40 °C to +85 °C ambient due to low ΔVZ (≤13 V between 10–50% IZM) and radiation-immune construction. |
Use Scenario: Providing stable 150 V reference for analog telemetry sensor front-ends in deep-space probe instrumentation modules. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and DAC output scaling circuits. Use Value: Delivers <2 μA leakage at 114 V and <0.1% VZ drift/year, ensuring telemetry accuracy over 15-year mission lifetime. |
| Tactical Radar Transmitter Protection | Nuclear Facility Control System Clamp |
|
Use Scenario: Clamping transient spikes on 150 V modulator supply rails during RF pulse generation in ground-based radar systems. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing 0.75 A surges without parametric shift. Use Value: Survives repeated 8.3 ms surges with no change in VZ or ZZ, verified per MIL-STD-750 Method 5005. |
Use Scenario: Safeguarding safety-critical 150 V logic supplies in reactor control rod drive electronics exposed to gamma radiation fields. IC Role / Device Role / Timing Role: Radiation-hardened voltage clamp preventing latch-up in downstream CMOS interface ICs. Use Value: Zero functional degradation after 100 krad(Si) TID exposure, eliminating need for periodic recalibration or 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 |
|---|---|---|---|
| 1N4986US | Commercial-grade version; same VZ, ZZ, and package but lacks MIL-PRF-19500 screening and radiation data | Approved for non-mission-critical industrial controls; not qualified for flight or nuclear environments | Select when cost sensitivity outweighs radiation tolerance and extended temperature validation needs |
| JANTXV1N4986US | Higher-screened variant with extended burn-in, additional thermal shock cycles, and tighter VZ tolerance (±2%) | Required for manned spacecraft avionics and DoD Class H/V applications demanding zero latent defects | Select when system-level reliability requires zero-failure probability over 15+ years in orbit |
Compared with JANTX1N4986US/TR, 1N4986US offers identical electrical performance at lower cost but no radiation or military screening, while JANTXV1N4986US adds tighter tolerances and enhanced process controls for ultra-high-integrity systems-enabling trade-offs between qualification depth, lifetime assurance, and procurement budget.
Availability
JANTX1N4986US/TR is available at Aetrix Electronics and suitable for aerospace power regulation, satellite telemetry reference, and nuclear facility control systems requiring stable component supply with guaranteed traceability and long-term obsolescence management.
Supply support for JANTX1N4986US/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 hermetically sealed devices.
The JANTX1N4986US/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode family, engineered specifically for voltage regulation and transient protection in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTX1N4986US/TR?
JANTX1N4986US/TR has a nominal Zener voltage of 150 V with a standard tolerance of ±5%, as defined in the MIL-PRF-19500/356 specification. This tolerance applies at the test current IZT = 8 mA and ambient temperature of 25 °C. The JANTX1N4986US/TR does not include tighter tolerance suffixes (e.g., 'C' for ±2%); those are available only in the JANTXV grade.
Is JANTX1N4986US/TR compatible with lead-free solder reflow profiles?
JANTX1N4986US/TR features Sn/Pb–finished copper end caps and is qualified for traditional eutectic solder processes. While it can withstand peak reflow temperatures up to 235 °C for ≤60 seconds, Microsemi documentation does not validate its reliability under Pb-free reflow profiles (e.g., SAC305 with 260 °C peak). For lead-free assembly, JANTX1N4986US/TR requires process qualification per J-STD-020.
Does JANTX1N4986US/TR have documented radiation hardness data?
Yes - JANTX1N4986US/TR is inherently radiation-hardened per Microsemi MicroNote 050, with confirmed performance stability up to 100 krad(Si) total ionizing dose. No parametric shifts exceeding specification limits were observed in VZ, IR, or ZZ after irradiation, making JANTX1N4986US/TR suitable for low-earth orbit and terrestrial nuclear environments.
What is the maximum continuous Zener current for JANTX1N4986US/TR?
The maximum continuous Zener current IZM for JANTX1N4986US/TR is 1.0 A, derived from its 5 W power rating and 150 V VZ. This assumes operation at TEC = 140 °C with linear derating to zero at 175 °C. At 25 °C ambient, practical IZM is limited by PCB thermal design; typical design practice restricts steady-state current to ≤0.75 A for long-term reliability.
How is polarity identified on JANTX1N4986US/TR?
JANTX1N4986US/TR uses a cathode band marking on the glass body to indicate polarity. The banded end is the cathode terminal, which must be connected to the higher-potential node in Zener regulation applications. This band is visible under standard optical inspection and remains legible after conformal coating or potting, per MIL-PRF-19500/356 marking requirements.
JANTX1N4986CUS/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):
- 150 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 330 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 114 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
JANTX1N4986CUS/TR FAQ
1.How can I place an order for JANTX1N4986CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4986CUS/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 JANTX1N4986CUS/TR reliable?
The price and inventory of JANTX1N4986CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4986CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4986CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4986CUS/TR transactions.
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JANTX1N4986CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4986CUS/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 JANTX1N4986CUS/TR?
For technical support, including JANTX1N4986CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4986CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4986CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4986CUS/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 JANTX1N4986CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4986CUS/TR?
All JANTX1N4986CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4986CUS/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 JANTX1N4986CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4986CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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