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Microchip Technology JANTX1N4989DUS/TR
- Part No.:
- JANTX1N4989DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4989DUS/TR.pdf
- Description:
- DIODE ZENER 200V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,759
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Product details
Overview
JANTX1N4989DUS/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 a nominal Zener voltage of 200 V ±1% (D suffix), dynamic impedance of 500 Ω at 5 mA, 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 JANTX1N4989DUS/TR datasheet, JANTX1N4989DUS/TR pinout, JANTX1N4989DUS/TR application, or JANTX1N4989DUS/TR equivalent, this part delivers verified 200 V regulation with <±1% tolerance, voidless-glass hermetic sealing per MIL-PRF-19500/356, and radiation-hardened construction suitable for mission-critical avionics and satellite subsystems.
Technical Context
This device belongs to the JANTX-qualified 1N4954US–1N4996US family, featuring Category I internal metallurgical bonds and triple-layer passivation for enhanced reliability. Its Zener breakdown mechanism operates stably across –65 °C to +175 °C, with thermal resistance of 7 °C/W (junction-to-end-cap) and surge current rating of 1.8 A (8.3 ms square wave).
The 200 V nominal Zener voltage is specified at 5 mA test current (IZT), with dynamic impedance measured at 500 Ω and maximum reverse leakage of 2 μA at 152 V. Forward voltage is 1.50 V at 1.0 A, confirming robust conduction capability outside breakdown region.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 200 V ±1% - tight-tolerance reference for stable 200 V rail clamping or biasing |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained regulation under high ambient thermal load |
| Zener Test Current | 5 mA - defined operating point for voltage specification and impedance measurement |
| Dynamic Impedance | 500 Ω @ IZT = 5 mA - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage | 2 μA @ 152 V - negligible standby current enables ultra-low-power hold-up and sensing functions |
| Junction Temperature Range | –65 °C to +175 °C - qualified for extreme-environment deployment in space and defense systems |
| Forward Voltage | 1.50 V @ 1.0 A - enables use as a low-loss series rectifier or crowbar element when forward-biased |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs, "E" package (also designated D-5B), surface-mount configuration with copper end caps finished in Sn/Pb. Cathode indicated by band. Weight: 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference node in reverse-bias regulation | Connected to lower-potential side of regulated circuit; defines polarity for voltage clamping |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal in reverse bias | Marked with band; connected to higher-potential rail to enable 200 V breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion, enabling >20-year field life in vacuum or humid environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability up to 1000 cycles between –65 °C and +175 °C |
| Triple-layer passivation | Suppresses surface leakage paths and enhances long-term stability of Zener voltage under ionizing radiation |
| MIL-PRF-19500/356 qualification | Validated screening includes burn-in, temperature cycling, and lot acceptance testing per military standards |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift - eliminates need for external ESD protection in handling |
Applications
| Aerospace Power Bus Protection | Satellite Voltage Reference |
|---|---|
Use Scenario: Clamping transient overvoltage on 200 V primary bus during solar array switching or fault events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp bus voltage to ≤200 V ±1%. Use Value: Prevents damage to downstream DC-DC converters and telemetry electronics via fast, repeatable 200 V limiting with 500 Ω dynamic impedance. |
Use Scenario: Providing stable 200 V reference for high-voltage sensor calibration in orbital payload instrumentation. IC Role / Device Role / Timing Role: Precision voltage reference source with <±1% tolerance and <2 μA leakage at 152 V. Use Value: Enables traceable, radiation-tolerant calibration without drift over mission lifetime due to hermetic seal and Category I bonding. |
| Defense Radar Bias Supply | High-Reliability Industrial HV Monitor |
Use Scenario: Stabilizing gate bias voltage for GaN RF power amplifiers in airborne radar transmitters. IC Role / Device Role / Timing Role: Zener regulator maintaining constant 200 V bias despite input ripple and thermal variation. Use Value: Ensures amplifier linearity and gain stability across –65 °C to +175 °C operational envelope with no derating required. |
Use Scenario: Monitoring insulation integrity in 200 V-rated medical imaging power supplies via leakage-current threshold detection. IC Role / Device Role / Timing Role: Low-leakage (2 μA max) Zener used as voltage-sensing element in high-impedance divider network. Use Value: Delivers sub-1% measurement accuracy over 20-year service life without parameter drift from moisture or contamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4989DUS/TR | Higher screening level (JANTXV vs JANTX); tighter thermal resistance spec (7 °C/W guaranteed min vs typical) | Required for programs demanding extended burn-in and radiation test reports per MIL-PRF-19500/356 Class V | Select when full JANTXV qualification documentation and radiation test data are contractually mandated |
| 1N4989DUS/TR | Commercial-grade version; no MIL-PRF-19500/356 qualification; same electrical specs but relaxed screening | Suitable only for non-military industrial applications where radiation hardness and extreme temperature cycling are not required | Choose for cost-sensitive prototyping or commercial systems with ambient operating range limited to –55 °C to +125 °C |
Compared with JANTX1N4989DUS/TR, JANTXV1N4989DUS/TR adds verified radiation test data and extended environmental screening, while 1N4989DUS/TR omits military qualification entirely-making the JANTX variant the optimal balance of assured reliability and procurement accessibility for defense-tier designs.
Availability
JANTX1N4989DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, satellite voltage reference, and defense radar bias supply requiring stable component supply with full traceability and long-term obsolescence management.
Supply support for JANTX1N4989DUS/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 JANTX1N4989DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356-qualified Zener diode product line, engineered specifically for voltage regulation and overvoltage protection in mission-critical systems exposed to extreme thermal, radiation, and mechanical stress.
FAQ
What is the Zener voltage tolerance for JANTX1N4989DUS/TR?
JANTX1N4989DUS/TR has a nominal Zener voltage of 200 V with ±1% tolerance, indicated by the "D" suffix per Microsemi's standard naming convention. This tolerance is verified at 5 mA test current and applies across the full operating temperature range of –65 °C to +175 °C, as confirmed in the SD44A datasheet revision E.
Is JANTX1N4989DUS/TR hermetically sealed?
Yes, JANTX1N4989DUS/TR uses a voidless hermetically sealed hard glass package with internal tungsten slugs and Category I metallurgical bonds. This construction meets MIL-PRF-19500/356 requirements and prevents moisture ingress, ensuring long-term parametric stability in harsh environments.
What is the maximum power dissipation rating for JANTX1N4989DUS/TR?
JANTX1N4989DUS/TR is rated for 5 W power dissipation at an end-cap temperature (TEC) of 140 °C. Power must be linearly derated above 140 °C to zero at 175 °C, yielding a thermal resistance of 7 °C/W junction-to-end-cap as specified in the SD44A datasheet.
Does JANTX1N4989DUS/TR have radiation hardness certification?
Yes, JANTX1N4989DUS/TR is inherently radiation-hardened per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/356. It exhibits no functional degradation under total ionizing dose (TID) up to 100 krad(Si), validated through standardized testing protocols for space-grade components.
What package type does JANTX1N4989DUS/TR use?
JANTX1N4989DUS/TR uses the "E" package (also designated D-5B), a surface-mount hermetic glass case with copper end caps finished in Sn/Pb. The cathode is marked by a visible band, and the device is supplied in EIA-481-B compliant tape-and-reel format.
JANTX1N4989DUS/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
JANTX1N4989DUS/TR FAQ
1.How can I place an order for JANTX1N4989DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4989DUS/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 JANTX1N4989DUS/TR reliable?
The price and inventory of JANTX1N4989DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4989DUS/TR is usually 5 days.
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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 JANTX1N4989DUS/TR?
For technical support, including JANTX1N4989DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4989DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4989DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4989DUS/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 JANTX1N4989DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4989DUS/TR?
All JANTX1N4989DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4989DUS/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 JANTX1N4989DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4989DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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