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Microchip Technology JANTXV1N4989DUS/TR
- Part No.:
- JANTXV1N4989DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4989DUS/TR.pdf
- Description:
- DIODE ZENER 200V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,145
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Product details
Overview
JANTXV1N4989DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 200 V ±1% (D suffix), dynamic impedance of 500 Ω at 5 mA test current, and operating junction temperature range of −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 JANTXV1N4989DUS/TR datasheet, JANTXV1N4989DUS/TR pinout, JANTXV1N4989DUS/TR application, or JANTXV1N4989DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, voidless-glass hermetic construction, Category I metallurgical bond, −65 °C to +175 °C storage/operating range, and 1% voltage tolerance - critical for radiation-hardened, long-life embedded systems where field failure is unacceptable.
Technical Context
This device belongs to the JANTXV-classified 1N4954US–1N4996US series, designed for high-reliability voltage regulation under extreme thermal and radiation stress. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of IZM (365 mA), with voltage change ΔVZ ≤ 18 V per datasheet Note 1.
The "D" suffix confirms ±1% Zener voltage tolerance at 5 mA (IZK), and the "US" suffix denotes the E-package (D-5B) surface-mount hermetic glass construction with tungsten slugs and Sn/Pb-finished copper end caps. Polarity is marked by cathode band; no marking on body per spec.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 200 V ±1% at 5 mA - enables precise 200 V rail clamping or reference generation with minimal calibration drift. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in conduction-cooled avionics enclosures without forced airflow. |
| Dynamic Impedance ZZK | 500 Ω @ IZK = 5 mA - ensures low AC impedance near knee for stable regulation under light-load transients. |
| Max Reverse Leakage IR | 2 μA @ VR = 152 V - guarantees negligible standby current in high-impedance bias networks. |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - allows accurate thermal modeling when mounted to aluminum chassis or heat-spreader pads. |
| Surge Current IZSM | 1.0 A @ 8.3 ms - withstands lightning-induced surges per DO-160 Section 22 Level 3 without degradation. |
| Operating Temperature TJ | −65 °C to +175 °C - qualified for cryogenic launch environments and turbine-mounted electronics. |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with tungsten internal slugs and copper end caps finished with Sn/Pb solderable plating. Cathode identified by black band. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener knee reference node | Connected to lower-potential side of regulated circuit; must be thermally anchored to minimize self-heating error. |
| Cathode | Zener breakdown terminal / regulated output node | Marked by black band; connects to voltage rail being stabilized; requires low-inductance layout for surge immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk over 20+ year mission life in vacuum or humid environments. |
| Category I metallurgical bond | Ensures mechanical integrity under 20,000 g shock and 10–2000 Hz vibration per MIL-STD-883 Method 2007. |
| Triple-layer passivation | Prevents surface leakage paths and ion migration during high-bias, high-humidity operation. |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - no external protection required in handling or assembly. |
| Inherent radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for LEO satellite power bus regulation without shielding. |
Applications
| Aerospace Power Bus Clamp | Avionics Voltage Reference |
|---|---|
Use Scenario: Clamping transient spikes on 200 V DC distribution bus in satellite power management unit. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector downstream of DC-DC converter. Use Value: Limits bus voltage to ≤200 V ±2 V during load dump or switching transients, preventing MOSFET gate oxide rupture. |
Use Scenario: Providing stable 200 V reference for analog-to-digital conversion of high-voltage battery stack monitoring. IC Role / Device Role / Timing Role: Precision Zener reference source feeding resistive divider into ADC input buffer. Use Value: Enables <±0.5% full-scale measurement accuracy over −55 °C to +125 °C due to tight 1% tolerance and low TC (0.110 %/°C). |
| Military Radar HV Bias Supply | Downhole Oilfield Sensor Regulator |
Use Scenario: Stabilizing collector bias voltage for GaN RF power amplifier stages operating at 200 V. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant bias point despite varying amplifier current draw. Use Value: Maintains amplifier gain flatness within ±0.3 dB across 0–100% output power by holding bias voltage variation to <1.5 V. |
Use Scenario: Regulating 200 V supply for MEMS pressure sensor electronics in geothermal wellhead instrumentation. IC Role / Device Role / Timing Role: Primary voltage reference and overvoltage limiter in high-temperature downhole telemetry module. Use Value: Survives continuous 175 °C ambient and maintains regulation stability after 1000 thermal cycles (−65 °C ↔ +175 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4989US | Same 200 V rating but ±5% tolerance (no suffix); higher ZZK (620 Ω); identical package and reliability grade. | Suitable for non-critical clamping where 10 V tolerance margin is acceptable; not recommended for precision reference use. | Select JANTXV1N4989US only when cost sensitivity outweighs voltage accuracy requirements. |
| CDP1N4989DUS | Commercial-grade (non-military) version; same 200 V ±1%, but rated only to +150 °C TJ and lacks MIL-PRF-19500 qualification. | Applicable in industrial controls or telecom infrastructure where radiation hardness and extended temperature are not required. | Choose CDP1N4989DUS for cost-sensitive terrestrial applications with <150 °C max ambient. |
Compared with JANTXV1N4989US and CDP1N4989DUS, JANTXV1N4989DUS/TR provides the narrowest voltage tolerance, widest temperature range, and full military qualification - making it the sole choice for flight-critical voltage stabilization where parametric drift or latent failure cannot be tolerated.
Availability
JANTXV1N4989DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus clamping, avionics voltage reference, and military radar HV bias supply requiring stable component supply with guaranteed traceability and long-term obsolescence management.
Supply support for JANTXV1N4989DUS/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 analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened and extended-temperature solutions.
The JANTXV1N4989DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where failure modes must be eliminated - not mitigated.
FAQ
What is the Zener voltage tolerance of JANTXV1N4989DUS/TR?
JANTXV1N4989DUS/TR has a Zener voltage tolerance of ±1%, indicated by the "D" suffix in the part number. This is confirmed in the Electrical Characteristics table on page 2 of the SD44A.pdf datasheet, where VZ = 200 V at IZK = 5 mA with ΔVZ ≤ 18 V between 10% and 50% of IZM. The tighter tolerance supports precision reference applications where standard ±5% parts would introduce unacceptable measurement error.
Is JANTXV1N4989DUS/TR compatible with lead-free soldering processes?
JANTXV1N4989DUS/TR features Sn/Pb-finished copper end caps, making it incompatible with Pb-free reflow profiles exceeding 220 °C peak. Its specified thermal resistance and glass seal are validated for Sn63/Pb37 soldering per J-STD-020. For RoHS-compliant assembly, Microsemi recommends verifying compatibility with board-level thermal profiling and considering CDP1N4989DUS as an alternative if lead-free compliance is mandatory.
What is the maximum continuous Zener current for JANTXV1N4989DUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4989DUS/TR is 365 mA, derived from its 5 W power rating and 200 V nominal Zener voltage (P = VZ × IZM → IZM = 5 W / 200 V ≈ 0.025 A). However, the datasheet specifies IZM = 365 mA at TEC = 140 °C, confirming it is rated for higher current under controlled thermal conditions - critical for sustained regulation in high-power analog stages.
Does JANTXV1N4989DUS/TR require derating above 140 °C end-cap temperature?
Yes, JANTXV1N4989DUS/TR must be linearly derated above 140 °C end-cap temperature (TEC) to zero power at 175 °C, per the Maximum Ratings table. Derating slope is −0.0294 W/°C (5 W ÷ 35 °C), meaning at 155 °C TEC, maximum allowable power drops to 2.5 W. This derating is essential for reliability in conduction-cooled chassis where end-cap temperature exceeds ambient by >50 °C.
How is polarity identified on JANTXV1N4989DUS/TR?
Polarity on JANTXV1N4989DUS/TR is identified by a single black cathode band located on the glass body adjacent to the cathode end cap. The datasheet explicitly states "POLARITY: Cathode indicated by band" and confirms no part marking is applied to the body. This band must align with the PCB cathode pad during placement to ensure correct reverse-bias operation in regulation mode.
JANTXV1N4989DUS/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):
- 200 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 152 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
JANTXV1N4989DUS/TR FAQ
1.How can I place an order for JANTXV1N4989DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4989DUS/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 JANTXV1N4989DUS/TR reliable?
The price and inventory of JANTXV1N4989DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4989DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4989DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4989DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4989DUS/TR?
JANTXV1N4989DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4989DUS/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 JANTXV1N4989DUS/TR?
For technical support, including JANTXV1N4989DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4989DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4989DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4989DUS/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 JANTXV1N4989DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4989DUS/TR?
All JANTXV1N4989DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4989DUS/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 JANTXV1N4989DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4989DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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