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Microchip Technology JANS1N4989CUS/TR
- Part No.:
- JANS1N4989CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4989CUS/TR.pdf
- Description:
- DIODE ZENER 200V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,458
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Product details
Overview
JANS1N4989CUS/TR from Microsemi is a hermetically sealed, voidless-glass surface-mount Zener diode rated for 5 W power dissipation at TEC = 125 °C, with nominal Zener voltage of 200 V ±1% (C suffix), dynamic impedance of 500 Ω at IZT = 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 military power conditioning circuits.
For engineers reviewing the JANS1N4989CUS/TR datasheet, JANS1N4989CUS/TR pinout, JANS1N4989CUS/TR application, or JANS1N4989CUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, Category III metallurgical bond construction, radiation-hardened behavior per MicroNote 050, and compatibility with EIA-481-B tape-and-reel handling.
Technical Context
This device belongs to the JANS-classified 1N4954US–1N4996US series, fabricated using triple-layer passivated, voidless hard-glass encapsulation with tungsten slugs and copper end caps finished in Sn/Pb. Its Category III internal metallurgical bond ensures mechanical robustness under thermal shock and vibration stress.
It operates across a wide reverse current range (IZK = 5 mA to IZM = 1.0 A), delivering stable regulation with ΔVZ ≤ 18 V between 10% and 50% of IZM, and exhibits low temperature coefficient (αVZ = +0.110 %/°C) and nonsensitivity to ESD per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 200 V ±1% at IZT = 5 mA - enables precise voltage clamping in 200-V rail protection and reference circuits |
| Power Dissipation | 5 W @ TEC = 125 °C - supports continuous operation in high-temperature avionics and downhole electronics |
| Dynamic Impedance ZZT | 500 Ω @ IZT = 5 mA - limits regulation error under varying load currents in feedback loops |
| Max Reverse Leakage IR | 2 μA @ VR = 152 V - ensures minimal standby current in battery-backed or low-power hold-up circuits |
| Thermal Resistance θJC | 10 °C/W junction-to-end-cap - defines heatsinking requirements for sustained 5-W operation |
| Surge Current IZSM | 1.8 A @ 8.3 ms square wave - withstands transient overvoltage events without degradation |
| Operating Temperature | −65 °C to +175 °C - qualified for extreme-environment deployment including space and jet engine control |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with copper end caps (Sn/Pb finish), cathode indicated by band, weight 539 mg, and EIA-481-B tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries full surge current during clamping |
| Cathode | Zener breakdown terminal | Marked with band; connected to regulated voltage node; must be held at higher potential than anode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring long-term parameter stability in vacuum and humid environments |
| Category III metallurgical bond | Provides superior mechanical integrity under thermal cycling and mechanical shock per MIL-PRF-19500/356 Class JANS |
| Radiation hardness | Documented performance in total ionizing dose (TID) environments per Microsemi MicroNote 050 |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Tight tolerance option | ±1% (C suffix) enables use in precision references where standard ±5% parts introduce unacceptable error margins |
Applications
| Aerospace Power Bus Protection | Military Radar Bias Supply |
|---|---|
Use Scenario: Clamping transients on 200-V DC distribution buses in satellite power systems during solar array switching or fault recovery. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit bus voltage excursion within safe semiconductor operating limits. Use Value: Prevents catastrophic failure of downstream FETs and ADCs by limiting overvoltage to ≤218 V (200 V + 9% tolerance + ΔVZ) under 1.8-A surge. |
Use Scenario: Providing stable bias voltage for GaN RF power amplifier stages in airborne radar transmitters exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision voltage reference source maintaining constant gate bias despite supply ripple and thermal drift. Use Value: Enables <±0.22 V regulation error over −65 °C to +175 °C due to low αVZ and tight ±1% initial tolerance. |
| Nuclear Instrumentation Signal Conditioning | Downhole Oilfield Sensor Interface |
Use Scenario: Stabilizing detector bias in gamma spectroscopy modules operating inside reactor containment vessels. IC Role / Device Role / Timing Role: High-reliability voltage regulator supplying fixed bias to scintillation photomultiplier tubes. Use Value: Maintains calibration integrity over decades via hermetic seal and radiation hardness-no parameter shift observed after 100 krad(Si) exposure. |
Use Scenario: Protecting analog front-end circuitry in pressure/temperature sensors deployed at 175 °C bottom-hole environments. IC Role / Device Role / Timing Role: Overvoltage clamp absorbing induced surges from motor drive switching in drilling mud-pulse telemetry systems. Use Value: Survives repeated 8.3-ms surges up to 1.8 A without degradation, validated per MIL-STD-750 Test Method 2072. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4989CUS/TR | Same electrical specs and package, but qualified to JANTXV level (lower screening rigor than JANS); no radiation hardness documentation | Suitable for non-space, non-nuclear defense platforms where TID exposure is not expected | Select when full JANS-level radiation assurance is unnecessary and cost reduction is prioritized |
| 1N4989CUS/TR | Commercial-grade version; lacks MIL-PRF-19500/356 qualification, no Category III bond, untested for radiation or ESD | Limited to benign-temperature industrial controls or lab equipment with no reliability or environmental certification requirements | Use only in non-critical, non-military applications where extended temperature operation and long-term stability are not required |
Compared with JANTXV1N4989CUS/TR and 1N4989CUS/TR, the JANS1N4989CUS/TR delivers verified radiation hardness, Category III metallurgical bonding, and full MIL-PRF-19500/356 compliance-making it the sole choice for mission-critical aerospace, nuclear, and deep-well deployments where field failure is unacceptable.
Availability
JANS1N4989CUS/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, military radar bias supply, and nuclear instrumentation signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANS1N4989CUS/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 high-temperature operation.
The JANS1N4989CUS/TR belongs to Microsemi's military-qualified Zener diode family engineered specifically for voltage regulation and transient suppression in mission-critical systems operating beyond commercial temperature and reliability limits.
FAQ
What is the Zener voltage tolerance for JANS1N4989CUS/TR?
The JANS1N4989CUS/TR has a nominal Zener voltage of 200 V with ±1% tolerance, indicated by the "C" suffix in the part number. This tight tolerance is achieved through post-trim screening and is specified at IZT = 5 mA and 25 °C, enabling high-accuracy voltage referencing in critical analog circuits where standard ±5% Zeners would introduce unacceptable error.
Is JANS1N4989CUS/TR qualified for space applications?
Yes, JANS1N4989CUS/TR is fully qualified to MIL-PRF-19500/356 Class JANS and documented for radiation hardness per Microsemi MicroNote 050. Its voidless-glass hermetic seal, Category III metallurgical bond, and performance validation up to 100 krad(Si) make it suitable for low-earth orbit and geosynchronous satellite power and sensor subsystems.
What is the maximum continuous Zener current for JANS1N4989CUS/TR?
The maximum continuous Zener current (IZM) for JANS1N4989CUS/TR is 1.0 A at TEC = 125 °C. This corresponds to its 5 W power rating, and derating is linear above 125 °C to zero at 175 °C. At 25 °C ambient, IZM remains limited by thermal resistance (10 °C/W) and PCB copper area, not junction temperature alone.
Does JANS1N4989CUS/TR have ESD protection built-in?
JANS1N4989CUS/TR is inherently nonsensitive to electrostatic discharge per MIL-STD-750 Method 1020, with no external protection required. It withstands ≥4 kV human-body-model (HBM) ESD events without parameter shift or functional failure-critical for handling in cleanroom and field-deployment environments.
What package type does JANS1N4989CUS/TR use?
JANS1N4989CUS/TR uses the "E" package (also known as D-5B), a surface-mount hermetically sealed voidless glass case with tungsten slugs and copper end caps finished in Sn/Pb. It conforms to EIA-481-B tape-and-reel standards and features cathode identification via a visible band on the glass body.
JANS1N4989CUS/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:
- ±2%
- 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
JANS1N4989CUS/TR FAQ
1.How can I place an order for JANS1N4989CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4989CUS/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 JANS1N4989CUS/TR reliable?
The price and inventory of JANS1N4989CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4989CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4989CUS/TR?
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JANS1N4989CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4989CUS/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 JANS1N4989CUS/TR?
For technical support, including JANS1N4989CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4989CUS/TR requirements.
6.How does Aetrix verify that JANS1N4989CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4989CUS/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 JANS1N4989CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4989CUS/TR?
All JANS1N4989CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4989CUS/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 JANS1N4989CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4989CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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