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Microchip Technology JANTX1N4988DUS/TR
- Part No.:
- JANTX1N4988DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4988DUS/TR.pdf
- Description:
- DIODE ZENER 180V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
JANTX1N4988DUS/TR from Microsemi is a hermetically sealed, voidless-glass surface-mount 5 W Zener diode with nominal Zener voltage of 180 V, ±1% tolerance (D suffix), and maximum power dissipation of 5 W at TEC = 125 °C. It operates from −65 °C to +175 °C and delivers stable voltage regulation in high-reliability aerospace, defense, and downhole instrumentation systems.
For engineers reviewing the JANTX1N4988DUS/TR datasheet, JANTX1N4988DUS/TR pinout, JANTX1N4988DUS/TR application, or JANTX1N4988DUS/TR equivalent, this part serves as a military-qualified, radiation-hardened, ESD-insensitive voltage reference and overvoltage clamp in mission-critical analog power rails where failure is not tolerable.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family and uses Category III internal metallurgical bonds for enhanced reliability. Its voidless-glass construction ensures hermetic sealing without internal cavities, eliminating moisture ingress and thermal stress delamination risks.
It exhibits 450 Ω dynamic impedance at IZT = 5 mA, 16 mA maximum reverse leakage at VR = 144 V, and a temperature coefficient of +0.110 %/°C - enabling predictable drift compensation in wide-temperature-range designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 180 V ±1% at IZT = 5 mA - precise reference for high-voltage biasing and clamping circuits. |
| Power Dissipation | 5 W @ TEC = 125 °C - supports sustained regulation under high ambient conditions with linear derating to zero at 175 °C. |
| Dynamic Impedance (ZZT) | 450 Ω @ IZT = 5 mA - defines voltage regulation stability under varying load current. |
| Max Reverse Leakage (IR) | 2 μA @ VR = 144 V - ensures minimal standby current in high-impedance sensing paths. |
| Thermal Resistance (RθJC) | 10 °C/W junction-to-end-cap - enables accurate thermal modeling for PCB copper pad sizing and heatsinking. |
| Operating Temperature | −65 °C to +175 °C - validated for extended-life deployment in space, avionics, and oilfield electronics. |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - defines conduction loss during forward-biased fault conditions. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; end caps are copper with Sn/Pb finish; polarity indicated by cathode band; "E" package (also designated D-5B); weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node; must be routed with adequate trace width for 1.0 A surge capability. |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal | Marked with band; connected to regulated voltage rail; requires low-inductance grounding for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal microcavities to prevent moisture-induced corrosion and parameter shift over 20+ year lifetimes. |
| Category III metallurgical bond | Provides superior interfacial strength between semiconductor die and slug, meeting MIL-PRF-19500/356 mechanical shock requirements. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling and assembly without special ESD controls, reducing manufacturing overhead in Class 100 cleanrooms. |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for total ionizing dose (TID) > 100 krad(Si), suitable for LEO and GEO satellite power conditioning. |
| Triple-layer passivation | Protects surface states from contamination and humidity, maintaining Zener voltage stability across 85/85 accelerated aging tests. |
Applications
| Aerospace Power Bus Protection | Downhole Logging Tool Reference |
|---|---|
Use Scenario: Clamping transients on 150–200 V DC bus in satellite power distribution units during solar array switching events. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector and precision voltage reference for ADC biasing. Use Value: Withstands 14.4 A surge current (8.3 ms square wave) and maintains ±1% regulation across −65 °C to +125 °C operational range. |
Use Scenario: Providing stable 180 V reference for gamma-ray detector front-end amplifiers in oil/gas well logging tools operating at 175 °C. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference replacing less reliable resistor-divider networks. Use Value: Zero parameter drift due to hermetic seal and Category III bond enables calibration retention over 500+ hours at 175 °C. |
| Military Radar Bias Supply | Nuclear Instrumentation Channel |
Use Scenario: Regulating gate bias voltage for GaN RF power amplifiers in airborne radar transmitters exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: Precision Zener regulator stabilizing amplifier quiescent point against supply ripple and temperature variation. Use Value: +0.110 %/°C tempco allows predictable compensation in closed-loop bias control algorithms. |
Use Scenario: Generating calibrated high-voltage bias for proportional counters in reactor monitoring systems requiring long-term metrological traceability. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source immune to displacement damage up to 100 krad(Si). Use Value: Inherent TID hardness eliminates need for shielding or derating, reducing system mass and volume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4988DUS/TR | Higher screening level (JANTXV vs JANTX); tighter test limits for parametric outliers and burn-in. | Required for flight-critical subsystems where zero defect probability is mandated (e.g., NASA Class S). | Select JANTXV when full MIL-PRF-19500/356 Class V screening is contractually required. |
| 1N4988US (non-JAN) | No military qualification; commercial-grade screening; same electrical specs and package. | Suitable for ground-test equipment or non-safety-critical industrial prototypes. | Choose 1N4988US only for cost-sensitive development phases where MIL-spec is not enforced. |
Compared with JANTX1N4988DUS/TR, JANTXV1N4988DUS/TR adds burn-in and parametric screening rigor but shares identical Zener voltage, thermal resistance, and surge rating; 1N4988US retains all electrical performance but lacks radiation hardness validation and ESD immunity certification.
Availability
JANTX1N4988DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation, military radar biasing, and nuclear instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4988DUS/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, mixed-signal, and radiation-hardened components for defense, aerospace, and industrial markets.
JANTX1N4988DUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode product line, engineered specifically for voltage regulation and transient protection in mission-critical systems where parameter stability under extreme environmental stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4988DUS/TR?
JANTX1N4988DUS/TR has a nominal Zener voltage of 180 V with ±1% tolerance, indicated by the "D" suffix per Microsemi's standard coding. This tolerance is verified at IZT = 5 mA and applies across the full operating temperature range of −65 °C to +175 °C. The JANTX1N4988DUS/TR meets MIL-PRF-19500/356 requirements for parameter consistency in high-reliability applications.
Does JANTX1N4988DUS/TR require derating above 125 °C?
Yes, JANTX1N4988DUS/TR must be derated linearly above 125 °C ambient (TEC) to zero power at 175 °C, per its maximum ratings table. At 150 °C, its usable power drops to 3.33 W; at 175 °C, it is rated for zero continuous dissipation. This derating curve is defined in the SD44A datasheet and applies to both steady-state and pulsed operation.
Is JANTX1N4988DUS/TR compatible with lead-free solder reflow profiles?
No - JANTX1N4988DUS/TR features Sn/Pb (tin/lead) terminations and is not qualified for lead-free reflow. Its end caps use traditional eutectic solder finish, and exposure to peak temperatures > 220 °C (typical for Pb-free profiles) risks intermetallic degradation and hermetic seal compromise. Use only with SnPb-compatible thermal profiles per J-STD-020.
What is the surge current rating for JANTX1N4988DUS/TR?
JANTX1N4988DUS/TR supports a nonrepetitive peak Zener surge current (IZSM) of 14.4 A for an 8.3 ms square wave, as specified in the Electrical Characteristics table. This rating assumes proper PCB thermal design (e.g., ≥1 in² 2-oz copper pour) and validates its use in transient overvoltage suppression scenarios such as lightning-induced spikes or inductive kickback.
How does the radiation hardness of JANTX1N4988DUS/TR compare to commercial Zeners?
JANTX1N4988DUS/TR exhibits inherent radiation hardness validated per Microsemi MicroNote 050, with total ionizing dose (TID) tolerance exceeding 100 krad(Si). Commercial Zeners lack this characterization and typically degrade significantly above 10 krad(Si). This makes JANTX1N4988DUS/TR suitable for satellite power systems where cumulative radiation exposure must not alter Zener voltage or leakage beyond specification limits.
JANTX1N4988DUS/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):
- 180 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 450 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 136.8 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
JANTX1N4988DUS/TR FAQ
1.How can I place an order for JANTX1N4988DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4988DUS/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 JANTX1N4988DUS/TR reliable?
The price and inventory of JANTX1N4988DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4988DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4988DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4988DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4988DUS/TR?
JANTX1N4988DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4988DUS/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 JANTX1N4988DUS/TR?
For technical support, including JANTX1N4988DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4988DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4988DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4988DUS/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 JANTX1N4988DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4988DUS/TR?
All JANTX1N4988DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4988DUS/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 JANTX1N4988DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4988DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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