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Microchip Technology JANTX1N4964US/TR
- Part No.:
- JANTX1N4964US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4964US/TR.pdf
- Description:
- DIODE ZENER 18V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
JANTX1N4964US/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 18 V ±5%, dynamic impedance of 4.0 Ω at 65 mA test current, and operating junction temperature range of –65 °C to +175 °C. It serves as a precision voltage reference and regulation element in high-reliability power supply rails and analog signal conditioning circuits.
For engineers reviewing the JANTX1N4964US/TR datasheet, JANTX1N4964US/TR pinout, JANTX1N4964US/TR application, or JANTX1N4964US/TR equivalent, this part is selected for aerospace power supervisors, radiation-hardened sensor interfaces, and MIL-PRF-19500/356-compliant voltage clamping where long-term parametric stability and voidless-glass reliability are mandatory.
Technical Context
This device operates in reverse-biased Zener breakdown mode with a specified knee current (IZK) of 5 mA and regulated voltage tolerance of ±5% at IZT = 65 mA. Its thermal resistance is 7 °C/W (junction-to-end-cap), enabling stable regulation across –65 °C to +175 °C ambient extremes without derating below 140 °C end-cap temperature.
It features triple-layer passivation and Category I internal metallurgical bonds per MIL-PRF-19500/356, ensuring immunity to moisture ingress and mechanical stress. The voidless hermetic glass package with tungsten slugs and copper end caps supports solder reflow compatibility while maintaining ESD insensitivity per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±5% at IZT = 65 mA - defines stable regulation point for biasing and reference circuits |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in high-temperature avionics enclosures |
| Dynamic Impedance (ZZ) | 4.0 Ω @ IZT - ensures low output impedance for minimal voltage deviation under load transients |
| Max Reverse Leakage (IR) | 5 μA @ VR = 13.7 V - guarantees tight regulation margin before breakdown onset |
| Thermal Resistance (RθJ-EC) | 7 °C/W - enables predictable junction temperature rise with known end-cap cooling |
| Surge Current (IZSM) | 9.0 A @ 8.3 ms - withstands transient overvoltage events in MIL-STD-1275 automotive/aerospace systems |
| Operating Temperature | –65 °C to +175 °C - qualified for cryogenic launch environments and engine bay proximity mounting |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" or "D-5B") with copper end caps (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 | Connected to lower-potential node in reverse-bias configuration; carries forward current up to 1.0 A at ≤1.5 V |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; establishes regulated voltage reference at 18 V when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture-induced parameter drift and corrosion failure in 100% RH or salt fog environments |
| Category I metallurgical bond | Guarantees mechanical integrity under shock/vibration per MIL-STD-883 Method 2002 |
| Nonsensitive to ESD | Withstands ≥4 kV HBM without degradation-eliminates need for external protection in handling |
| Radiation hardness | Qualified per MicroNote 050 for total ionizing dose (TID) >100 krad(Si)-suitable for LEO satellite power rails |
| Triple-layer passivation | Blocks surface contamination and leakage paths on glass surface-ensures long-term IR stability |
Applications
| Aerospace Power Supervision | Avionics Sensor Biasing |
|---|---|
Use Scenario: Monitoring 28 V DC bus in flight control computers to detect undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Zener clamp referenced to system ground, providing threshold detection input to comparator circuitry. Use Value: Stable 18 V reference ensures consistent trip points across –55 °C to +125 °C operational range without calibration drift. |
Use Scenario: Supplying precise bias voltage to piezoresistive pressure transducers in engine health monitoring systems. IC Role / Device Role / Timing Role: Low-noise voltage reference source for bridge excitation, replacing less stable IC references. Use Value: 4.0 Ω dynamic impedance minimizes output ripple under varying sensor loading, improving measurement resolution. |
| Military Radio RF Stage Protection | Satellite Command Decoder Power Rail |
Use Scenario: Clamping RF amplifier stage supply rails against lightning-induced surges per MIL-STD-461 RS103. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between VDD and ground, absorbing 8.3 ms surge energy. Use Value: 9.0 A surge rating and 18 V clamping level protect GaAs MMICs without sacrificing bandwidth or adding capacitance. |
Use Scenario: Regulating 5 V logic rail for command decoder ASICs exposed to space radiation. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator maintaining stable supply despite single-event effects. Use Value: Inherent TID hardness >100 krad(Si) eliminates need for shielding or redundant regulators in payload electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4964US | Higher screening grade (JANTXV vs JANTX); tighter tempco (±0.085%/°C vs ±0.085%/°C same), identical VZ and ZZ | Required for programs demanding extended burn-in and radiation lot acceptance testing per MIL-PRF-19500/356 Class V | Select JANTXV1N4964US when full Class V qualification and enhanced life testing are mandated by program spec |
| 1N4964US | Commercial-grade version; same electrical specs but no MIL-PRF-19500/356 qualification or radiation data | Suitable only for non-military industrial controls where cost sensitivity outweighs reliability requirements | Choose 1N4964US for prototyping or commercial subsystems not subject to DoD procurement rules |
Compared with JANTX1N4964US/TR, JANTXV1N4964US adds verified radiation performance and extended environmental screening, while 1N4964US omits military qualification entirely-making the JANTX variant the optimal balance of assured reliability and procurement accessibility for defense contractors.
Availability
JANTX1N4964US/TR is available at Aetrix Electronics and suitable for aerospace power supervision, avionics sensor biasing, and military radio RF stage protection requiring stable component supply under extended temperature cycling and radiation exposure.
Supply support for JANTX1N4964US/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 hermetic packaging.
The JANTX1N4964US/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener series, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTX1N4964US/TR?
The JANTX1N4964US/TR has a nominal Zener voltage of 18 V with a standard tolerance of ±5%, as defined in the Electrical Characteristics table at IZT = 65 mA. This tolerance remains valid across the full operating temperature range of –65 °C to +175 °C, supporting consistent regulation in extreme environments where JANTX1N4964US/TR is deployed.
Does JANTX1N4964US/TR require derating above 140 °C?
Yes, JANTX1N4964US/TR must be derated linearly above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. This derating curve is defined in the Maximum Ratings section and applies directly to JANTX1N4964US/TR due to its 7 °C/W thermal resistance and glass-package construction.
Is JANTX1N4964US/TR compatible with lead-free reflow profiles?
JANTX1N4964US/TR uses Sn/Pb-finished copper end caps and is qualified for traditional eutectic solder reflow. While it can survive peak temperatures up to 235 °C, Microsemi does not specify full compatibility with Pb-free reflow profiles (e.g., JEDEC J-STD-020); users should validate thermal profile margins before deploying JANTX1N4964US/TR in lead-free assembly lines.
What is the maximum surge current rating for JANTX1N4964US/TR?
JANTX1N4964US/TR is rated for a nonrepetitive peak Zener surge current (IZSM) of 9.0 A at an 8.3 ms square-wave pulse, as specified in the Electrical Characteristics table. This rating is validated for JANTX1N4964US/TR under standard test conditions and supports compliance with MIL-STD-1275 transient suppression requirements.
How is polarity marked on JANTX1N4964US/TR?
JANTX1N4964US/TR uses a cathode band to indicate polarity, consistent with industry-standard diode marking. The banded end is the cathode and must be connected to the higher-potential node in Zener regulation applications. No additional marking is present on the voidless glass body, as confirmed in the Mechanical and Packaging section for JANTX1N4964US/TR.
JANTX1N4964US/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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 13.7 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
JANTX1N4964US/TR FAQ
1.How can I place an order for JANTX1N4964US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4964US/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 JANTX1N4964US/TR reliable?
The price and inventory of JANTX1N4964US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4964US/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4964US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4964US/TR transactions.
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4.How is shipping managed for JANTX1N4964US/TR?
JANTX1N4964US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4964US/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 JANTX1N4964US/TR?
For technical support, including JANTX1N4964US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4964US/TR requirements.
6.How does Aetrix verify that JANTX1N4964US/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4964US/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 JANTX1N4964US/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4964US/TR?
All JANTX1N4964US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4964US/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 JANTX1N4964US/TR part is unused and in its original packaging.
Return procedure for JANTX1N4964US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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