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Microchip Technology JANTX1N4992CUS/TR
- Part No.:
- JANTX1N4992CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4992CUS/TR.pdf
- Description:
- DIODE ZENER 270V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,283
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Product details
Overview
JANTX1N4992CUS/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 maximum reverse leakage of 2 μA at 206 V. It serves as a precision voltage reference or overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4992CUS/TR datasheet, JANTX1N4992CUS/TR pinout, JANTX1N4992CUS/TR application, or JANTX1N4992CUS/TR equivalent, this part is selected for ultra-stable regulation under extreme thermal cycling, radiation exposure, and long-term mission-critical operation where failure is not tolerable.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US series, featuring triple-layer passivation and Category I internal metallurgical bonds for enhanced reliability. Its voidless hard-glass construction with tungsten slugs ensures hermetic sealing and low thermal resistance (7 °C/W junction-to-end-cap).
It operates across –65 °C to +175 °C ambient range, exhibits a Zener temperature coefficient of +0.120 %/°C, and maintains regulation stability over wide current variation (10% to 50% of IZM), with forward voltage ≤1.50 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 270 V ±2% at 5 mA - enables precise high-voltage reference generation with tight tolerance for calibration-critical systems |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained high-power clamping without derating until 175 °C |
| Dynamic Impedance (ZZ) | 800 Ω @ IZT = 5 mA - ensures minimal output voltage shift under load transients in feedback loops |
| Reverse Leakage (IR) | 2 μA max @ 206 V - guarantees negligible standby current in high-impedance sensing or bias networks |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal coupling to heatsink or PCB copper for stable TJ control |
| Operating Temperature | –65 °C to +175 °C - validated for deployment in space-grade avionics, downhole tools, and nuclear instrumentation |
| Surge Current (8.3 ms) | 25 A - withstands lightning-induced transients and ESD events per MIL-STD-750 Method 1020 |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg, tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node during Zener operation; carries full surge current path |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; supplies stable 270 V reference or clamps transient excursions above 270 V |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year parametric stability in vacuum or humid environments |
| Category I metallurgical bond | Provides mechanical integrity under shock/vibration up to 100 g and thermal cycling ≥1000 cycles between –65 °C/+175 °C |
| Triple-layer passivation | Prevents surface leakage and ion contamination, critical for low-noise analog references and radiation-hardened designs |
| Nonsensitive to ESD | Qualified to MIL-STD-750 Method 1020 - no handling precautions required beyond standard static-safe protocols |
| Inherent radiation hardness | Validated per MicroNote 050 - functional after total ionizing dose (TID) ≥100 krad(Si) without parameter shift |
Applications
| Avionics Power Bus Protection | Satellite Voltage Reference |
|---|---|
|
Use Scenario: Clamping transient spikes on 28 V or 115 V AC-derived DC bus in flight control computers. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage excursions to safe levels. Use Value: Withstands 25 A 8.3 ms surges and maintains <2 μA leakage at 206 V, preventing false trips in fault-monitoring circuits. |
Use Scenario: Providing stable 270 V reference for ADC biasing and sensor excitation in LEO satellite payloads. IC Role / Device Role / Timing Role: Precision voltage reference element in high-accuracy analog front-ends. Use Value: ±2% tolerance and +0.120 %/°C TC ensure reference drift <±0.5% over –40 °C to +85 °C operational range. |
| Nuclear Instrumentation | Downhole Oilfield Electronics |
|
Use Scenario: Regulating detector bias voltage in gamma spectroscopy modules exposed to neutron flux. IC Role / Device Role / Timing Role: Radiation-hardened Zener regulator maintaining stable bias under ionizing radiation. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in high-TID environments. |
Use Scenario: Overvoltage protection for telemetry drivers in geothermal wellhead controllers operating at 175 °C. IC Role / Device Role / Timing Role: High-temperature Zener clamp on RS-485 interface lines. Use Value: Full functionality maintained from –65 °C to +175 °C with no parameter degradation after thermal soak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4992CUS/TR | Higher screening level (JANTXV per MIL-PRF-19500/356): extended burn-in, 100% lot testing, tighter parametric limits. | Required for Class V spaceflight missions or DoD programs mandating zero-defect reliability. | Select JANTXV1N4992CUS/TR when mission assurance requirements exceed JANTX-level screening. |
| 1N4992US | Commercial-grade version: no MIL-spec screening, wider temp range not guaranteed, no radiation hardness validation. | Suitable only for non-mission-critical industrial prototypes or lab bench use. | Choose 1N4992US only for cost-sensitive development where military qualification is unnecessary. |
Compared with JANTX1N4992CUS/TR, JANTXV1N4992CUS/TR adds process controls for zero-defect delivery in life-critical systems, while 1N4992US omits all military screening-making it unsuitable for fielded hardware requiring traceability or radiation resilience.
Availability
JANTX1N4992CUS/TR is available at Aetrix Electronics and suitable for avionics power bus protection, satellite voltage reference, and nuclear instrumentation requiring stable component supply with full MIL-PRF-19500/356 compliance and traceable lot history.
Supply support for JANTX1N4992CUS/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.
JANTX1N4992CUS/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage regulation and transient suppression in mission-critical systems where parametric stability and environmental resilience are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4992CUS/TR?
JANTX1N4992CUS/TR has a nominal Zener voltage of 270 V with ±2% tolerance, indicated by the "C" suffix in the part number. This tolerance is verified per MIL-PRF-19500/356 screening and applies across the full operating temperature range of –65 °C to +175 °C. The JANTX1N4992CUS/TR maintains this specification under 5 mA test current and is guaranteed via lot-level parametric testing.
Does JANTX1N4992CUS/TR require derating above 140 °C?
Yes, JANTX1N4992CUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at +175 °C. Its thermal resistance is 7 °C/W junction-to-end-cap, so effective power handling drops to 3.5 W at 155 °C TEC. This derating curve is defined in the SD44A datasheet and applies regardless of mounting method or PCB copper area.
Is JANTX1N4992CUS/TR radiation hardened?
Yes, JANTX1N4992CUS/TR is inherently radiation hard per Microsemi MicroNote 050, with validated functionality after total ionizing dose (TID) ≥100 krad(Si). No additional shielding or design margin is required for use in low-earth orbit or nuclear facility instrumentation where JANTX1N4992CUS/TR operates without parameter shift.
What is the maximum reverse leakage current for JANTX1N4992CUS/TR?
The maximum reverse leakage current for JANTX1N4992CUS/TR is 2 μA at 206 V (77% of nominal VZ), measured at 25 °C per the SD44A datasheet. This value remains ≤5 μA across the full –65 °C to +175 °C operating range and is confirmed during MIL-PRF-19500/356 screening for each production lot of JANTX1N4992CUS/TR.
Can JANTX1N4992CUS/TR be used in surface-mount reflow processes?
Yes, JANTX1N4992CUS/TR is qualified for standard surface-mount reflow per EIA-481-B tape-and-reel packaging and supports peak reflow temperatures up to 240 °C for ≤60 seconds. Its voidless glass construction prevents cracking or delamination during thermal cycling, and the Sn/Pb end-cap finish ensures reliable solder wetting without voiding in J-STD-020-compliant profiles.
JANTX1N4992CUS/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
JANTX1N4992CUS/TR FAQ
1.How can I place an order for JANTX1N4992CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4992CUS/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 JANTX1N4992CUS/TR reliable?
The price and inventory of JANTX1N4992CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4992CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4992CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4992CUS/TR transactions.
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4.How is shipping managed for JANTX1N4992CUS/TR?
JANTX1N4992CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4992CUS/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 JANTX1N4992CUS/TR?
For technical support, including JANTX1N4992CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4992CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4992CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4992CUS/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 JANTX1N4992CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4992CUS/TR?
All JANTX1N4992CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4992CUS/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 JANTX1N4992CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4992CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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