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Microchip Technology JANTXV1N4990CUS/TR
- Part No.:
- JANTXV1N4990CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4990CUS/TR.pdf
- Description:
- DIODE ZENER 220V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,689
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Product details
Overview
JANTXV1N4990CUS/TR from Microsemi is a military-grade, voidless-hermetically sealed surface-mount Zener diode with 220 V nominal Zener voltage, ±2% tolerance (C suffix), 5 W power rating at 140 °C end-cap temperature, and rated for operation from −65 °C to +175 °C. It serves as a precision voltage reference or overvoltage clamp in high-reliability power regulation circuits within aerospace avionics and radiation-hardened instrumentation.
For engineers reviewing the JANTXV1N4990CUS/TR datasheet, JANTXV1N4990CUS/TR pinout, JANTXV1N4990CUS/TR application, or JANTXV1N4990CUS/TR equivalent, key selection criteria include its hermetic glass package, Category I metallurgical bond, 19 mA maximum continuous Zener current, and −0.115 %/°C temperature coefficient - critical for stable biasing in extended-temperature analog front-ends.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US series, featuring voidless hard-glass construction with tungsten slugs and copper end caps with Sn/Pb finish. Its Zener breakdown mechanism delivers regulated voltage across a broad operating current range (10% to 50% of IZM) with ΔVZ ≤ 19 V under specified test conditions.
The JANTXV1N4990CUS/TR exhibits 550 Ω dynamic impedance at 5 mA test current (IZK), 2 μA maximum reverse leakage at 167 V, and 8.0 V forward voltage at 1.0 A - confirming robust conduction capability and low-knee leakage essential for fail-safe protection in mission-critical DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 220 V ±2% at 5 mA - ensures tight regulation for high-voltage reference nodes in analog signal chains. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in thermally constrained military enclosures without forced cooling. |
| Operating Temperature | −65 °C to +175 °C - enables deployment in jet engine control units and space-qualified power supplies. |
| Dynamic Impedance (ZZK) | 550 Ω @ IZK = 5 mA - maintains stable regulation under low-current bias conditions typical in sensor excitation circuits. |
| Reverse Leakage (IR) | 2 μA max @ 167 V - minimizes standby power loss in high-impedance voltage monitor inputs. |
| Temperature Coefficient (αVZ) | −0.115 %/°C - enables predictable drift compensation in precision voltage references over wide thermal excursions. |
| Surge Current (IZSM) | 1.8 A @ 8.3 ms - withstands transient overvoltage events such as load dump or ESD coupling in vehicle electronics. |
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. 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 rail; carries full surge current during forward-biased fault conditions. |
| Cathode | Zener breakdown terminal | Connected to regulated node; defines reference potential; marked by visible band on glass body. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion - validated for 20+ year field life in sealed avionics modules. |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration up to 100 g - required for flight-critical power monitoring. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates handling precautions during manual assembly in cleanroom environments. |
| Inherent radiation hardness | Qualified per MicroNote 050 - suitable for low-dose-rate space applications without additional shielding. |
| Triple-layer passivation | Suppresses surface leakage paths - critical for maintaining <2 μA IR at 167 V in high-humidity storage. |
Applications
| Aerospace Power Monitoring | Rad-Hard Instrumentation |
|---|---|
Use Scenario: Real-time detection of 28 V DC bus overvoltage in satellite power distribution units. IC Role / Device Role / Timing Role: Precision Zener clamp referenced to isolated ground, triggering shutdown logic at 32 V threshold. Use Value: −0.115 %/°C tempco and 2 μA leakage ensure false-trip rate <1e−9/hour across −40 °C to +85 °C operational range. |
Use Scenario: Stable 220 V reference for gamma-ray spectrometer high-voltage bias supply calibration. IC Role / Device Role / Timing Role: Primary voltage reference element in closed-loop feedback path of Cockcroft-Walton multiplier. Use Value: Hermetic seal and radiation hardness maintain ±0.5% output stability after 10 krad(Si) total ionizing dose exposure. |
| Military Vehicle ECUs | High-Reliability Test Equipment |
Use Scenario: Load-dump suppression on 24 V CAN bus power rail in armored vehicle control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping peak to 35 V during ISO 7637-2 Pulse 5a events. Use Value: 1.8 A surge rating and 550 Ω ZZK limit clamping overshoot to <5% above rated voltage under 100 ms transients. |
Use Scenario: Calibration reference in automated test systems verifying high-voltage insulation resistance meters. IC Role / Device Role / Timing Role: Traceable 220 V ±2% source used to validate meter linearity at 100–250 V range endpoints. Use Value: JAN-class qualification and 20-year shelf-life guarantee enable NIST-traceable recalibration intervals without drift verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4990DUS/TR | ±1% tolerance (D suffix) vs. ±2% (C suffix); otherwise identical electrical and mechanical specs. | Required where tighter initial accuracy needed for metrology-grade references, not general-purpose clamping. | Select JANTXV1N4990DUS/TR only when system-level error budget demands sub-1% absolute voltage error at 25 °C. |
| 1N4990US (commercial grade) | No JAN/JANTXV qualification; no radiation hardness data; wider −65 °C to +150 °C operating range. | Suitable for non-mission-critical industrial controls but excluded from flight hardware or nuclear instrumentation. | Choose 1N4990US only for cost-sensitive terrestrial applications where MIL-PRF-19500/356 compliance is not mandated. |
Compared with JANTXV1N4990CUS/TR, JANTXV1N4990DUS/TR offers higher initial accuracy at equal reliability, while 1N4990US sacrifices qualification and radiation tolerance for lower cost and simplified procurement - making the C-suffix variant optimal for balanced performance in certified aerospace systems.
Availability
JANTXV1N4990CUS/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, rad-hard instrumentation, and military vehicle ECUs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANTXV1N4990CUS/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 semiconductor components for defense, aerospace, and industrial markets, with emphasis on radiation-hardened and MIL-spec devices.
The JANTXV1N4990CUS/TR belongs to Microsemi's legacy 1N49xxUS Zener family, engineered specifically for voltage regulation in mission-critical systems where hermeticity, temperature resilience, and long-term parametric stability are non-negotiable.
FAQ
What is the Zener voltage tolerance of JANTXV1N4990CUS/TR?
JANTXV1N4990CUS/TR has a nominal Zener voltage of 220 V with a tolerance of ±2%, denoted by the "C" suffix in the part number. This tolerance is guaranteed at 25 °C with 5 mA test current and applies across the full −65 °C to +175 °C operating range per MIL-PRF-19500/356 requirements. The JANTXV1N4990CUS/TR maintains this specification under thermal stress and long-term aging due to its voidless hermetic construction.
Does JANTXV1N4990CUS/TR require derating above 140 °C?
Yes, JANTXV1N4990CUS/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 ambient thermal design must ensure end-cap temperature remains ≤140 °C at full 5 W load. The JANTXV1N4990CUS/TR datasheet specifies this derating curve explicitly for MIL-qualified operation.
Is JANTXV1N4990CUS/TR compatible with lead-free solder reflow?
No - JANTXV1N4990CUS/TR features Sn/Pb (tin/lead) terminations and is not qualified for lead-free reflow profiles. Its end caps use traditional eutectic solder finish, and exposure to >260 °C peak temperatures risks delamination or bond degradation. For JANTXV1N4990CUS/TR assembly, standard Sn63/Pb37 reflow with peak ≤235 °C is required per Microsemi's packaging specifications.
What is the maximum reverse leakage current for JANTXV1N4990CUS/TR?
JANTXV1N4990CUS/TR has a maximum reverse leakage current (IR) of 2 μA at 167 V and 25 °C, as specified in the Electrical Characteristics table. This value remains ≤5 μA across the full −65 °C to +175 °C operating range. Low leakage is critical for JANTXV1N4990CUS/TR use in high-impedance reference dividers and battery-backed monitoring circuits.
How does the temperature coefficient affect JANTXV1N4990CUS/TR in precision applications?
JANTXV1N4990CUS/TR has a temperature coefficient of −0.115 %/°C, meaning its Zener voltage decreases by approximately 253 mV per °C rise at 220 V. In precision applications, this drift must be compensated via circuit design (e.g., matched TC resistors or digital calibration). The JANTXV1N4990CUS/TR datasheet provides full αVZ characterization curves to support such compensation modeling.
JANTXV1N4990CUS/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):
- 220 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 550 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 167 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
JANTXV1N4990CUS/TR FAQ
1.How can I place an order for JANTXV1N4990CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4990CUS/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 JANTXV1N4990CUS/TR reliable?
The price and inventory of JANTXV1N4990CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4990CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4990CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4990CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4990CUS/TR?
JANTXV1N4990CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4990CUS/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 JANTXV1N4990CUS/TR?
For technical support, including JANTXV1N4990CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4990CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4990CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4990CUS/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 JANTXV1N4990CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4990CUS/TR?
All JANTXV1N4990CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4990CUS/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 JANTXV1N4990CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4990CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4990CUS/TR Tags
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