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Microchip Technology JANTX1N4966CUS/TR
- Part No.:
- JANTX1N4966CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4966CUS/TR.pdf
- Description:
- DIODE ZENER 22V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,534
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Product details
Overview
JANTX1N4966CUS/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 22 V, ±5% tolerance (C suffix), and maximum Zener current IZM of 7.0 A at TEC = 125 °C. It operates across –65 °C to +175 °C and delivers stable voltage regulation in high-reliability military and aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4966CUS/TR datasheet, JANTX1N4966CUS/TR pinout, JANTX1N4966CUS/TR application, or JANTX1N4966CUS/TR equivalent, this part is selected for precision voltage reference, overvoltage protection, and bias stabilization where radiation hardness, ESD immunity, and long-term parametric stability under thermal stress are mandatory.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family and uses Category I internal metallurgical bonds with triple-layer passivation. Its voidless hermetic glass construction ensures zero moisture ingress and eliminates parameter drift due to environmental aging.
It exhibits a Zener impedance ZZ of 5.0 Ω at IZT = 50 mA, reverse leakage IR ≤ 2 μA at VR = 16.7 V, and temperature coefficient αVZ = +0.085 %/°C - enabling predictable regulation across wide junction temperature excursions without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 22 V @ IZT = 50 mA - defines precise regulation point for reference and clamping circuits |
| Zener Impedance (ZZ) | 5.0 Ω @ IZT - ensures minimal output voltage deviation under dynamic load changes |
| Max Continuous Current (IZM) | 7.0 A @ TEC = 125 °C - supports sustained 5 W dissipation in compact SMT layout |
| Reverse Leakage (IR) | ≤2 μA @ VR = 16.7 V - guarantees low standby power loss in high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.085 %/°C - enables predictable drift modeling for systems operating from –65 °C to +175 °C |
| Thermal Resistance (RθJC) | 10 °C/W junction-to-end-cap - informs heatsinking requirements for continuous 5 W operation |
| Surge Current (IZSM) | 14.4 A @ 8.3 ms - withstands transient overvoltage events without degradation |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; end caps are copper with Sn/Pb finish; polarity indicated by cathode band; weight 539 mg; "E" package (also known as "D-5B").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries full IZ during regulation |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture-induced parameter shift and ensures >20-year reliability in sealed enclosures |
| Category I metallurgical bond | Prevents interfacial delamination under thermal cycling (–65 °C to +175 °C) and mechanical shock |
| Triple-layer passivation | Blocks surface contamination and prevents leakage path formation on glass surface |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands ≥8 kV HBM without parameter shift - simplifies handling in uncontrolled environments |
| Inherent radiation hardness | Qualified per MicroNote 050 - suitable for space-grade power supplies without shielding overhead |
Applications
| Aerospace Power Bus Protection | Military Avionics Reference Supply |
|---|---|
Use Scenario: Clamping transients on 28 V DC aircraft bus during load dump or lightning-induced surges. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp voltage to ≤22 V. Use Value: Prevents downstream FPGA and ADC damage using inherent 14.4 A surge capability and 175 °C operational rating. |
Use Scenario: Providing stable 22 V reference for analog sensor signal conditioning in radar front-ends. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and +0.085 %/°C TC. Use Value: Maintains ADC accuracy across –55 °C to +125 °C ambient without calibration due to low drift and hermetic stability. |
| Satellite Payload Bias Regulation | Nuclear Instrumentation HV Monitoring |
Use Scenario: Biasing photomultiplier tube (PMT) dynodes in low-earth orbit payloads. IC Role / Device Role / Timing Role: High-reliability Zener regulator supplying stable 22 V to dynode chain. Use Value: Radiation-hardened construction avoids parametric degradation in 100 krad(Si) total ionizing dose environments. |
Use Scenario: Overvoltage detection in gamma spectrometer high-voltage supply feedback loop. IC Role / Device Role / Timing Role: Zener-based comparator threshold element sensing >22 V excursion. Use Value: Sub-2 μA leakage at 16.7 V ensures negligible loading on high-impedance HV divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4966CUS/TR | Higher screening level (JANTXV per MIL-PRF-19500/356); tighter lot acceptance testing; same electrical specs | Required for Class K (spaceflight) or critical flight hardware where burn-in and radiation lot acceptance are mandated | Select JANTXV1N4966CUS/TR when mission-critical reliability validation beyond JANTX is contractually required |
| 1N4966US | Commercial-grade version; no MIL-spec screening; identical Zener parameters and package | Suitable for ground-test equipment or non-mission-critical prototypes where cost and lead time outweigh screening needs | Choose 1N4966US for development boards or industrial test fixtures where MIL qualification is unnecessary |
Compared with JANTX1N4966CUS/TR, JANTXV1N4966CUS/TR adds process-level radiation assurance and extended life testing but shares identical thermal, electrical, and mechanical behavior; 1N4966US retains full functional equivalence while omitting military screening documentation and traceability.
Availability
JANTX1N4966CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military avionics reference design, and satellite payload bias regulation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4966CUS/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 defense, aerospace, and industrial markets, with emphasis on radiation-hardened and hermetically sealed components.
The JANTX1N4966CUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener diode product line, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTX1N4966CUS/TR?
JANTX1N4966CUS/TR has a nominal Zener voltage of 22 V with ±5% tolerance, as 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 JANTX1N4966CUS/TR maintains this specification under rated power dissipation and thermal conditions specified in the SD44A datasheet.
Does JANTX1N4966CUS/TR require heatsinking in 5 W operation?
Yes - JANTX1N4966CUS/TR has a thermal resistance of 10 °C/W junction-to-end-cap and must be mounted to a thermally conductive surface or heatsink to maintain TJ ≤ 175 °C at full 5 W dissipation. At TEC = 125 °C, it delivers its rated IZM = 7.0 A; derating is linear above that temperature. Proper PCB copper pour and end-cap soldering are essential for JANTX1N4966CUS/TR thermal performance.
Is JANTX1N4966CUS/TR compatible with lead-free reflow processes?
No - JANTX1N4966CUS/TR features Sn/Pb terminations and is not qualified for Pb-free reflow. Its end caps use tin/lead finish per the datasheet, and exposure to peak temperatures >220 °C (typical for lead-free profiles) risks solder joint integrity and glass-to-metal seal reliability. For JANTX1N4966CUS/TR assembly, Sn/Pb-compatible reflow profiles with peak ≤215 °C must be used.
What does the "TR" suffix indicate in JANTX1N4966CUS/TR?
The "TR" suffix in JANTX1N4966CUS/TR denotes tape-and-reel packaging per EIA-481-B standard, enabling automated SMT placement. This format includes orientation control (cathode band aligned), moisture-sensitive level (MSL) compliance per J-STD-020, and traceable reel labeling. The "TR" does not affect electrical or reliability specifications of the JANTX1N4966CUS/TR die or package.
How does JANTX1N4966CUS/TR perform under radiation exposure?
JANTX1N4966CUS/TR is inherently radiation-hardened per Microsemi MicroNote 050, exhibiting no significant parametric shift up to 100 krad(Si) total ionizing dose. Its voidless glass seal and Category I metallurgical bond prevent displacement damage accumulation. This radiation behavior is intrinsic to the JANTX1N4966CUS/TR construction and requires no additional shielding or derating in low-earth orbit or nuclear instrumentation applications.
JANTX1N4966CUS/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):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 16.7 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
JANTX1N4966CUS/TR FAQ
1.How can I place an order for JANTX1N4966CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4966CUS/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 JANTX1N4966CUS/TR reliable?
The price and inventory of JANTX1N4966CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4966CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4966CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4966CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4966CUS/TR?
JANTX1N4966CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4966CUS/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 JANTX1N4966CUS/TR?
For technical support, including JANTX1N4966CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4966CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4966CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4966CUS/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 JANTX1N4966CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4966CUS/TR?
All JANTX1N4966CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4966CUS/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 JANTX1N4966CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4966CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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