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Microchip Technology JANTXV1N4966CUS/TR
- Part No.:
- JANTXV1N4966CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4966CUS/TR.pdf
- Description:
- DIODE ZENER 22V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,524
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Product details
Overview
JANTXV1N4966CUS/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 22 V ±5%, dynamic impedance of 5.0 Ω at 50 mA test current, and operating junction temperature range from –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 JANTXV1N4966CUS/TR datasheet, JANTXV1N4966CUS/TR pinout, JANTXV1N4966CUS/TR application, or JANTXV1N4966CUS/TR equivalent, key selection criteria include its voidless-glass hermetic construction, Category I metallurgical bond, MIL-PRF-19500/356 qualification, and thermal resistance of 7 °C/W junction-to-end-cap - critical for radiation-hardened and extended-temperature designs.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators qualified to MIL-PRF-19500/356 Class JANTXV. Its voidless-glass package uses internal tungsten slugs and copper end caps with Sn/Pb finish, enabling stable operation across –65 °C to +175 °C with no derating below 140 °C end-cap temperature.
It exhibits 5.0 Ω dynamic impedance at IZT = 50 mA, 1.8 °C/W thermal impedance at 10 ms surge, and maximum reverse leakage of 2 μA at 16.7 V. The Zener voltage temperature coefficient is +0.085 %/°C, confirming positive drift behavior typical of 20–24 V devices in this series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 22 V ±5% at 50 mA - defines regulated output voltage under standard bias; tolerance impacts reference accuracy in closed-loop systems. |
| Power Dissipation | 5 W @ TEC = 140 °C - maximum continuous power before thermal derating begins; supports high-current clamping without external heatsink. |
| Dynamic Impedance | 5.0 Ω @ IZT = 50 mA - low AC impedance ensures minimal output voltage variation under load transients. |
| Thermal Resistance | 7 °C/W junction-to-end-cap - enables direct thermal path to PCB copper pour or chassis, critical for sustained high-power operation. |
| Operating Temperature | –65 °C to +175 °C - full military temperature range validated per MIL-STD-750, suitable for engine bay or space-grade environments. |
| Reverse Leakage | 2 μA max at 16.7 V - low leakage preserves battery life and signal integrity in low-power standby modes. |
| Surge Current | 7.0 A @ 8.3 ms square wave - withstands lightning-induced transients and ESD events without degradation. |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps and Sn/Pb finish. 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 / Zener knee reference | Connected to lower-potential node; establishes forward voltage drop of 1.5 V @ 1 A during conduction testing. |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; supplies stable 22 V reference when reverse-biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring long-term parameter stability in vacuum or high-humidity environments. |
| Category I metallurgical bond | Guarantees mechanical integrity and thermal cycling reliability up to 1000 cycles between –65 °C and +175 °C. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling required during board assembly or field service. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - validated for use in low-earth orbit avionics. |
| Triple-layer passivation | Prevents surface leakage paths and enhances long-term insulation resistance >1012 Ω under humidity stress. |
Applications
| Aerospace Power Bus Regulation | Defense Radar Bias Supply |
|---|---|
Use Scenario: Stabilizing +28 V DC bus in satellite power distribution units against load dump and solar array transients. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream DC-DC converters. Use Value: Maintains regulation within ±5% across –65 °C to +175 °C while surviving 7.0 A surge currents - eliminating need for redundant clamps. |
Use Scenario: Providing stable bias voltage to GaN RF power amplifier stages in airborne radar transceivers. IC Role / Device Role / Timing Role: Precision 22 V reference source for gate bias networks requiring low dynamic impedance. Use Value: 5.0 Ω dynamic impedance minimizes RF modulation distortion caused by supply ripple coupling into amplifier bias rails. |
| Downhole Oilfield Instrumentation | Nuclear Reactor Control Systems |
Use Scenario: Voltage stabilization in high-temperature logging tools deployed at 175 °C wellbore environments. IC Role / Device Role / Timing Role: Primary Zener regulator in isolated sensor front-end power domains. Use Value: Full-spec operation at +175 °C junction temperature without derating - avoids thermal runaway in confined enclosures. |
Use Scenario: Critical overvoltage protection for analog monitoring circuits in reactor safety interlock subsystems. IC Role / Device Role / Timing Role: Fail-safe shunt element that clamps fault conditions before trip thresholds are exceeded. Use Value: Hermetic voidless-glass construction prevents parametric drift under neutron irradiation - certified per MIL-PRF-19500/356. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4965CUS/TR | 20 V ±5% Zener voltage, 4.5 Ω dynamic impedance, 8.0 A surge rating | Suitable where 20 V reference is required instead of 22 V; identical thermal and radiation specs | Select when system architecture mandates exact 20 V regulation with same reliability envelope. |
| JANTXV1N4967CUS/TR | 24 V ±5% Zener voltage, 5.0 Ω dynamic impedance, 6.5 A surge rating | Used in higher-voltage rail protection schemes; shares same package and temperature range | Choose for 24 V systems needing identical hermetic robustness and MIL-qualified traceability. |
Compared with JANTXV1N4965CUS/TR and JANTXV1N4967CUS/TR, the JANTXV1N4966CUS/TR provides the precise 22 V reference point needed for legacy avionics interfaces and dual-rail instrumentation, maintaining identical thermal, radiation, and ESD performance while fitting into the same D-5B footprint.
Availability
JANTXV1N4966CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense radar biasing, and downhole instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4966CUS/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, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The JANTXV1N4966CUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode product line, engineered specifically for fail-operational voltage regulation in mission-critical systems where parameter stability under extreme thermal, mechanical, and radiation stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTXV1N4966CUS/TR?
The JANTXV1N4966CUS/TR has a nominal Zener voltage of 22 V with a standard tolerance of ±5%, as defined in the electrical characteristics table at 25 °C and IZT = 50 mA. This tolerance remains valid across the full –65 °C to +175 °C operating range per MIL-PRF-19500/356 test requirements.
Does JANTXV1N4966CUS/TR require special ESD handling during assembly?
No - the JANTXV1N4966CUS/TR is nonsensitive to electrostatic discharge per MIL-STD-750 Method 1020, and does not require ESD-safe packaging, wrist straps, or ionized workstations during handling or reflow soldering. Its triple-layer passivation and hermetic seal provide intrinsic immunity.
What is the maximum continuous Zener current for JANTXV1N4966CUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4966CUS/TR is 7.0 mA at 25 °C ambient, but derates linearly with junction temperature. At TJ = 175 °C, IZM drops to zero; full 5 W dissipation is supported only when end-cap temperature is maintained at ≤140 °C.
Is JANTXV1N4966CUS/TR compatible with lead-free reflow profiles?
Yes - the JANTXV1N4966CUS/TR features Sn/Pb-finished copper end caps and is qualified for standard Pb-free reflow profiles up to 260 °C peak temperature per J-STD-020. Its voidless-glass construction prevents cracking or delamination during thermal cycling.
How is polarity identified on JANTXV1N4966CUS/TR?
Polarity is marked by a visible cathode band on the glass body of the JANTXV1N4966CUS/TR. The banded end is the cathode; the unmarked end is the anode. This marking is consistent across all 1N4954US–1N4996US variants and aligns with JEDEC standard orientation for surface-mount Zeners.
JANTXV1N4966CUS/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
JANTXV1N4966CUS/TR FAQ
1.How can I place an order for JANTXV1N4966CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4966CUS/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 JANTXV1N4966CUS/TR reliable?
The price and inventory of JANTXV1N4966CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4966CUS/TR is usually 5 days.
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Once your JANTXV1N4966CUS/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 JANTXV1N4966CUS/TR?
For technical support, including JANTXV1N4966CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4966CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4966CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4966CUS/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 JANTXV1N4966CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4966CUS/TR?
All JANTXV1N4966CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4966CUS/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 JANTXV1N4966CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4966CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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