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Microchip Technology JANTXV1N4988CUS/TR
- Part No.:
- JANTXV1N4988CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4988CUS/TR.pdf
- Description:
- DIODE ZENER 180V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
JANTXV1N4988CUS/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 180 V, ±2% tolerance (C suffix), and maximum power dissipation of 5 W at 140 °C case temperature. It features 16 Ω dynamic impedance at 5 mA test current, 2 μA reverse leakage at 144 V, and operates from –65 °C to +175 °C. It serves as a precision voltage reference in high-reliability military power regulation circuits.
For engineers reviewing the JANTXV1N4988CUS/TR datasheet, JANTXV1N4988CUS/TR pinout, JANTXV1N4988CUS/TR application, or JANTXV1N4988CUS/TR equivalent, this page delivers verified electrical parameters, MIL-PRF-19500/356 qualification status, thermal resistance (7 °C/W), surge current rating (1.2 A @ 8.3 ms), and direct alternatives for radiation-hardened, high-temperature voltage regulation.
Technical Context
This device belongs to the JANTXV-grade 1N49xxUS series, qualified per MIL-PRF-19500/356 with Category I internal metallurgical bonds and triple-layer passivation. It uses a voidless hard-glass package with tungsten slugs and copper end caps with Sn/Pb finish, enabling operation up to 175 °C junction temperature.
Its Zener regulation is stable across wide current (5–136.8 mA) and temperature ranges, with a temperature coefficient of +0.110 %/°C and low dynamic impedance-critical for maintaining reference accuracy under load transients in avionics and space power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 180 V ±2% at 5 mA - ensures tight reference stability for high-voltage biasing and overvoltage clamping |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous regulation in conduction-cooled military enclosures |
| Dynamic Impedance (ZZ) | 16 Ω @ IZT = 5 mA - minimizes output voltage variation under changing load current |
| Reverse Leakage (IR) | 2 μA @ VR = 144 V - guarantees low standby power loss in high-impedance sensing paths |
| Thermal Resistance | 7 °C/W junction-to-end-cap - enables predictable thermal design without forced cooling |
| Surge Current | 1.2 A @ 8.3 ms - withstands transient overloads common in aircraft 28 V DC bus switching |
| Operating Temperature | –65 °C to +175 °C - certified for use in engine-mounted electronics and space-grade subsystems |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with copper end caps and Sn/Pb termination. Cathode indicated by band. No marking on body. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; handles 1.5 V forward drop at 1 A |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; carries regulated 180 V output when reverse biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk under thermal cycling and vacuum exposure |
| Category I metallurgical bond | Ensures mechanical integrity and long-term reliability in shock/vibration environments |
| Triple-layer passivation | Prevents moisture ingress and surface conduction degradation in humid or salt-laden atmospheres |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special grounding protocols during board assembly |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for total ionizing dose (TID) resilience in space applications |
Applications
| Aerospace Power Regulation | Avionics Reference Supply |
|---|---|
Use Scenario: Regulating 180 V rail in satellite power distribution units exposed to thermal extremes and radiation. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream DC-DC converters. Use Value: Maintains ±2% regulation across –65 °C to +175 °C with <2 μA leakage, ensuring stable converter feedback under mission-critical conditions. | Use Scenario: Providing stable bias voltage for analog front-end amplifiers in flight control computers. IC Role / Device Role / Timing Role: Precision shunt reference establishing accurate gain-setting nodes. Use Value: 16 Ω dynamic impedance minimizes gain drift during load transients, preserving sensor signal fidelity. |
| Military Vehicle Power Conditioning | Ground-Based Radar Bias Supply |
Use Scenario: Stabilizing high-voltage bias for RF power amplifier stages in mobile radar transmitters. IC Role / Device Role / Timing Role: Shunt regulator absorbing ripple and surges on 200 V DC bus derived from vehicle alternator. Use Value: 1.2 A surge rating absorbs 8.3 ms transients from ignition noise, preventing false triggering of protection circuitry. | Use Scenario: Generating calibrated 180 V reference for time-of-flight measurement circuits in phased-array radar receivers. IC Role / Device Role / Timing Role: Stable voltage source for ADC reference dividers and timing capacitor charging. Use Value: +0.110 %/°C tempco enables compensation algorithms to maintain sub-nanosecond timing accuracy over ambient range. |
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 | Same 180 V rating but ±1% tolerance (D suffix); higher cost and tighter test screening | Required where absolute reference accuracy exceeds ±2%, e.g., metrology-grade calibration sources | Select JANTXV1N4988DUS/TR only if system-level error budget demands <±1% Zener voltage deviation |
| 1N4988US (non-JANTXV) | Commercial-grade version; not MIL-PRF-19500/356 qualified; no radiation hardness documentation | Suitable for non-mission-critical industrial controls where extended temperature range is not required | Choose 1N4988US only for cost-sensitive, non-aerospace designs with ambient operating range limited to –55 °C to +125 °C |
Compared with JANTXV1N4988DUS/TR, the JANTXV1N4988CUS/TR offers optimal balance of precision, qualification, and cost for most defense avionics; versus 1N4988US, it provides guaranteed radiation tolerance, extended temperature capability, and full military traceability.
Availability
JANTXV1N4988CUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, avionics reference supply, and military vehicle power conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4988CUS/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 JANTXV1N49xxUS series was designed specifically to meet MIL-PRF-19500/356 requirements for hermetic, high-power Zener regulation in mission-critical systems operating under extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance for JANTXV1N4988CUS/TR?
JANTXV1N4988CUS/TR has a nominal Zener voltage of 180 V with a tolerance of ±2%, indicated by the "C" suffix in the part number. This tolerance is specified at 25 °C and applies across the full operating temperature range per MIL-PRF-19500/356 test requirements. The JANTXV1N4988CUS/TR maintains this tolerance under rated power and thermal conditions without derating.
Is JANTXV1N4988CUS/TR qualified to MIL-PRF-19500/356?
Yes, JANTXV1N4988CUS/TR is fully qualified to MIL-PRF-19500/356 as a JANTXV-grade device. It meets all screening, testing, and reliability requirements including burn-in, temperature cycling, and hermeticity verification. The JANTXV1N4988CUS/TR carries Category I internal metallurgical bonds and triple-layer passivation per the specification.
What is the maximum continuous Zener current for JANTXV1N4988CUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4988CUS/TR is 136.8 mA at 25 °C, calculated from its 5 W power rating and 180 V Zener voltage. Derating applies above 140 °C case temperature, reaching zero at 175 °C. This value is confirmed in the Electrical Characteristics table on page 2 of the SD44A.pdf datasheet for JANTXV1N4988CUS/TR.
Does JANTXV1N4988CUS/TR have radiation hardness certification?
Yes, JANTXV1N4988CUS/TR exhibits inherent radiation hardness documented in Microsemi MicroNote 050. While not individually lot-tested for TID, the voidless-glass construction and metallurgical bonding process provide proven resilience to total ionizing dose environments typical of low-earth orbit missions. This property is intrinsic to the JANTXV1N4988CUS/TR design and material system.
What is the thermal resistance of JANTXV1N4988CUS/TR?
JANTXV1N4988CUS/TR has a thermal resistance of 7 °C/W junction-to-end-cap, as specified in the Maximum Ratings section of the SD44A.pdf datasheet. This value applies to the 1N4954US–1N4996US family, which includes JANTXV1N4988CUS/TR. It enables accurate thermal modeling when mounted on copper pads with defined thermal vias or heatsinking structures.
JANTXV1N4988CUS/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:
- ±2%
- 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
JANTXV1N4988CUS/TR FAQ
1.How can I place an order for JANTXV1N4988CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4988CUS/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 JANTXV1N4988CUS/TR reliable?
The price and inventory of JANTXV1N4988CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4988CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4988CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4988CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4988CUS/TR?
JANTXV1N4988CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4988CUS/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 JANTXV1N4988CUS/TR?
For technical support, including JANTXV1N4988CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4988CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4988CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4988CUS/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 JANTXV1N4988CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4988CUS/TR?
All JANTXV1N4988CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4988CUS/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 JANTXV1N4988CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4988CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4988CUS/TR Tags
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