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Microchip Technology JANTXV1N4992CUS/TR
- Part No.:
- JANTXV1N4992CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4992CUS/TR.pdf
- Description:
- DIODE ZENER 270V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,846
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Product details
Overview
JANTXV1N4992CUS/TR from Microsemi is a military-grade, voidless-hermetically-sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 270 V ±2% (C suffix), dynamic impedance of 800 Ω at 5 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 JANTXV1N4992CUS/TR datasheet, JANTXV1N4992CUS/TR pinout, JANTXV1N4992CUS/TR application, or JANTXV1N4992CUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, hermetic glass package with tungsten slugs, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and ESD immunity per MIL-STD-750 Method 1020.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators, designed for high-stability voltage regulation under extreme thermal and radiation environments. Its voidless-glass hermetic seal and triple-layer passivation ensure long-term reliability in vacuum and high-humidity conditions.
The JANTXV1N4992CUS/TR uses an internal Category I metallurgical bond and exhibits a temperature coefficient of +0.120%/°C at 5 mA, enabling predictable voltage drift across –65 °C to +175 °C. Its 7 °C/W junction-to-end-cap thermal resistance supports stable operation at full 5 W rating when mounted on thermally optimized PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 270 V ±2% at 5 mA - tight tolerance enables accurate reference in precision power supply feedback loops |
| Power Dissipation | 5 W @ TEC = 140 °C - requires thermal pad design with ≥1.5 cm² copper area for full-rated operation |
| Dynamic Impedance (ZZ) | 800 Ω @ IZT = 5 mA - low AC impedance ensures minimal output voltage ripple under varying load |
| Max Reverse Leakage | 2 μA @ 206 V - guarantees negligible standby current in high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.120 %/°C @ 5 mA - positive slope allows predictable compensation in wide-temperature designs |
| Surge Current (8.3 ms) | 17.5 A - withstands transient overvoltage events such as lightning-induced surges in avionics |
| Junction Temp Range | –65 °C to +175 °C - validated for operation in satellite power systems and jet engine controllers |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs and copper end caps (Sn/Pb finish); marked with cathode band; "E" package (also designated D-5B); 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; must be routed with low-inductance path for surge handling |
| Cathode | Zener breakdown terminal | Marked by band; connects to regulated voltage rail; requires thermal relief pad for solder joint reliability during reflow |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and gas migration, ensuring >20-year shelf life and zero parametric drift in space vacuum |
| Category I metallurgical bond | Provides mechanical integrity under 20,000 g shock and 10–2000 Hz vibration per MIL-STD-883 Method 2007 |
| Radiation hardness | Qualified to 100 krad(Si) total ionizing dose per Microsemi MicroNote 050 - suitable for LEO satellite power rails |
| ESD immunity | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - no external protection required in clean-room assembly |
| Triple-layer passivation | Prevents surface leakage and sodium ion contamination in high-humidity coastal or marine deployment environments |
Applications
| Aerospace Power Bus Regulation | Avionics Overvoltage Protection |
|---|---|
Use Scenario: Regulating 270 V DC primary bus in unmanned aerial vehicles with wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp bus voltage and provide stable reference for error amplifiers. Use Value: Maintains ±0.5% regulation over –55 °C to +125 °C ambient due to low αVZ and hermetic stability. |
Use Scenario: Protecting flight control computers from transients induced by actuator switching or lightning coupling. IC Role / Device Role / Timing Role: Fast-acting shunt clamp triggered above 270 V threshold to divert surge energy to ground. Use Value: Absorbs 17.5 A 8.3 ms surge without degradation, verified per MIL-STD-704F Appendix B. |
| Satellite Solar Array Monitor | Nuclear Instrumentation Supply |
Use Scenario: Providing reference voltage for radiation-tolerant ADCs measuring solar panel IV curves in geosynchronous orbit. IC Role / Device Role / Timing Role: Precision voltage reference source with known temperature coefficient for gain calibration. Use Value: Delivers <10 ppm/°C drift over mission lifetime due to hermetic seal and radiation-hardened structure. |
Use Scenario: Stabilizing high-voltage bias supplies (200–300 V) for Geiger-Müller tubes in reactor monitoring systems. IC Role / Device Role / Timing Role: High-voltage Zener regulator maintaining constant bias despite line fluctuations and neutron flux. Use Value: Operates continuously at 175 °C junction temperature with no parameter shift after 1015 n/cm² fluence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4992US | Same 270 V rating but ±5% tolerance (no C suffix); identical package, thermal, and radiation specs | Lacks tight tolerance needed for closed-loop feedback; acceptable for open-loop clamping only | Select JANTXV1N4992US where cost sensitivity outweighs regulation accuracy requirements |
| CDLL1N4992US | Commercial-grade version (non-military); same electrical specs but not MIL-PRF-19500 qualified; no radiation hardening | Not approved for flight-critical systems; limited to ground-test equipment or non-safety-critical subsystems | Choose CDLL1N4992US for lab prototypes or industrial controls where qualification overhead is unnecessary |
Compared with JANTXV1N4992CUS/TR, JANTXV1N4992US sacrifices ±2% voltage accuracy for broader availability and lower cost, while CDLL1N4992US omits military screening and radiation assurance-making JANTXV1N4992CUS/TR the sole choice for certified airborne or spaceborne voltage regulation.
Availability
JANTXV1N4992CUS/TR is available at Aetrix Electronics and suitable for aerospace power bus regulation, avionics overvoltage protection, satellite solar array monitoring, and nuclear instrumentation supply requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4992CUS/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 defense, aerospace, and industrial markets.
The JANTXV1N4992CUS/TR belongs to Microsemi's legacy 1N49xxUS military Zener series, engineered specifically for voltage regulation and transient suppression in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTXV1N4992CUS/TR?
The JANTXV1N4992CUS/TR has a nominal Zener voltage of 270 V with ±2% tolerance, indicated by the "C" suffix per Microsemi's standard coding. This tighter tolerance is achieved through post-package screening and is validated across the full –65 °C to +175 °C operating range. The JANTXV1N4992CUS/TR maintains this specification under MIL-PRF-19500/356 testing protocols.
Is JANTXV1N4992CUS/TR suitable for space applications?
Yes, JANTXV1N4992CUS/TR is radiation-hardened to 100 krad(Si) total ionizing dose per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/356 Class V. Its voidless hermetic glass package and Category I metallurgical bond make it suitable for LEO and GEO satellite power systems where long-term parametric stability is mandatory.
What is the maximum continuous Zener current for JANTXV1N4992CUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4992CUS/TR is 5 mA at 25 °C, derating linearly to zero at +175 °C. At full 5 W dissipation, the device draws 18.5 mA at 270 V - this is only sustainable at TEC ≤ 140 °C with adequate PCB copper thermal mass. The JANTXV1N4992CUS/TR datasheet specifies 5 mA as the rated test current for VZ measurement.
Does JANTXV1N4992CUS/TR have ESD protection built-in?
Yes, JANTXV1N4992CUS/TR is inherently ESD-robust and tested to ≥4 kV Human Body Model per MIL-STD-750 Method 1020. No external ESD protection circuitry is required during handling or in-circuit operation. This immunity is enabled by its triple-layer passivation and hermetic seal, both integral to the JANTXV1N4992CUS/TR construction.
What package outline does JANTXV1N4992CUS/TR use?
JANTXV1N4992CUS/TR uses the "E" package (also designated D-5B), a surface-mount hermetic glass case with tungsten slugs and copper end caps. Its dimensions and recommended PCB pad layout are documented in Microsemi SD44A.pdf, including optional center adhesive spot for enhanced mechanical retention. The JANTXV1N4992CUS/TR weighs 539 mg and complies with EIA-481-B tape-and-reel standards.
JANTXV1N4992CUS/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):
- 270 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 800 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 206 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
JANTXV1N4992CUS/TR FAQ
1.How can I place an order for JANTXV1N4992CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4992CUS/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 JANTXV1N4992CUS/TR reliable?
The price and inventory of JANTXV1N4992CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4992CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4992CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4992CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4992CUS/TR?
JANTXV1N4992CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4992CUS/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 JANTXV1N4992CUS/TR?
For technical support, including JANTXV1N4992CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4992CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4992CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4992CUS/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 JANTXV1N4992CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4992CUS/TR?
All JANTXV1N4992CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4992CUS/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 JANTXV1N4992CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4992CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4992CUS/TR Tags
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