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Microchip Technology JANTXV1N4964CUS/TR
- Part No.:
- JANTXV1N4964CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4964CUS/TR.pdf
- Description:
- DIODE ZENER 18V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,529
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Product details
Overview
JANTXV1N4964CUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with nominal Zener voltage of 18 V at 65 mA test current, ±1% tolerance (C suffix), and maximum dynamic impedance of 4.0 Ω at IZT - designed for precision voltage regulation in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4964CUS/TR datasheet, JANTXV1N4964CUS/TR pinout, JANTXV1N4964CUS/TR application, or JANTXV1N4964CUS/TR equivalent, this part delivers verified radiation-hardened performance, -65°C to +175°C operating range, voidless-glass construction, and Category I metallurgical bonding per MIL-PRF-19500/356 - critical for mission-critical analog reference and overvoltage clamp functions.
Technical Context
This device operates as a two-terminal voltage reference diode in reverse breakdown, leveraging tightly controlled Zener avalanche characteristics across its full temperature range. Its 18 V nominal regulation point is stabilized by triple-layer passivation and internal tungsten slug thermal path, enabling stable operation under thermal shock and high-G mechanical stress.
The JANTXV1N4964CUS/TR exhibits low dynamic impedance (4.0 Ω @ 65 mA) and minimal voltage drift (±0.085%/°C tempco), supporting accurate DC biasing and feedback sensing in regulated power supplies and analog front-ends where long-term calibration stability is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±1% at 65 mA - enables precise 18 V rail regulation with <±180 mV absolute error over life and temperature. |
| Power Dissipation | 5 W @ TEC = 140°C - supports continuous operation in high-temperature avionics enclosures without derating below 140°C. |
| Dynamic Impedance (ZZ) | 4.0 Ω @ IZT - ensures <72 mV output variation across 10–50% of max Zener current (315–1575 mA range). |
| Max Reverse Leakage | 5 μA @ 13.7 V - guarantees negligible shunt current in standby mode, preserving battery-backed circuit integrity. |
| Temp Coefficient (αVZ) | ±0.085%/°C - limits voltage drift to ±15.3 mV/°C, critical for sensor excitation and ADC reference stability. |
| Surge Current (IZSM) | 9.0 A @ 8.3 ms - withstands lightning-induced transients and ESD events without degradation per MIL-STD-750 Method 1020. |
| Operating Temperature | -65°C to +175°C - qualified for deep-space cryogenic and turbine-mounted electronics without derating. |
Pinout & Package
Hermetically sealed voidless glass package with "E" outline (also designated D-5B), featuring copper end caps with Sn/Pb finish, cathode indicated by band, and polarity-aligned surface-mount geometry optimized for reflow soldering and thermal cycling reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to system ground or lowest potential node; must sustain 1.5 V forward drop at 1.0 A during fault conditions. |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 18 V reference when reverse-biased; requires current-limiting resistor or active driver to maintain IZ ≥ 10% IZM (31.5 mA). |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk - validated for >10,000 hr MSL 1 reliability per MIL-STD-883. |
| Category I metallurgical bond | Ensures mechanical integrity under 20,000 g shock and 50 g vibration - required for launch vehicle power subsystems. |
| Triple-layer passivation | Prevents surface leakage and ion migration in high-humidity or radiation environments - supports TID > 100 krad(Si). |
| Nonsensitive to ESD | Withstands ≥4 kV HBM without parameter shift - removes need for external TVS protection in board-level design. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) and single-event burnout (SEB) per MicroNote 050 - suitable for LEO and GEO missions. |
Applications
| Aerospace Power Conditioning | Avionics Sensor Excitation |
|---|---|
Use Scenario: Regulating auxiliary 18 V supply for flight control actuator drivers in F-35 hydraulic control units. IC Role / Device Role / Timing Role: Two-terminal Zener voltage reference providing stable bias for PWM gate drivers and op-amp comparators. Use Value: Maintains <±0.5% output accuracy over -55°C to +125°C ambient, preventing false trip signals during rapid thermal transients. |
Use Scenario: Supplying excitation voltage to strain-gauge bridges in wing-load monitoring systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement in analog signal chains. Use Value: Enables 16-bit effective resolution by limiting reference drift to <20 ppm/°C - directly traceable to NIST standards. |
| Satellite Power Bus Clamp | Military Radar Bias Supply |
Use Scenario: Clamping transient overvoltage on 28 V primary bus during solar array arc events in CubeSat platforms. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy up to 9.0 A peak for 8.3 ms. Use Value: Prevents downstream DC-DC converter latch-up without sacrificial fuse replacement - extends mission life beyond 5 years. |
Use Scenario: Generating stable 18 V bias for GaN RF amplifier stages in AN/TPQ-53 radar transceivers. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference for drain voltage stabilization under pulsed RF load. Use Value: Reduces AM-to-PM distortion by maintaining <0.1% VDD ripple, improving radar cross-section detection fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4964US/TR | Same 18 V rating but ±5% tolerance (no C suffix); higher ZZ = 4.5 Ω; identical package and temp range. | Lacks tight tolerance needed for precision feedback loops; acceptable for coarse overvoltage clamping only. | Select JANTXV1N4964US/TR only if cost sensitivity outweighs regulation accuracy requirements. |
| CDLL1800 | Commercial-grade 18 V Zener (±5%), 1.5 W rating, plastic SOD-123 package, -65°C to +150°C range. | Not radiation-hardened; lacks hermetic seal and MIL-PRF-19500 qualification; unsuitable for space or defense use. | CDLL1800 is viable only for non-mission-critical industrial prototypes with no environmental or reliability constraints. |
Compared with JANTXV1N4964US/TR and CDLL1800, the JANTXV1N4964CUS/TR uniquely combines ±1% tolerance, 5 W power handling, hermetic voidless glass, and radiation hardness - making it the sole option for flight-critical 18 V reference in DoD and NASA programs.
Availability
JANTXV1N4964CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, avionics sensor excitation, and satellite power bus clamp applications requiring stable component supply, long-lifecycle assurance, and full traceability to original Microsemi Scottsdale production lots.
Supply support for JANTXV1N4964CUS/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 manufacturer specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.
The JANTXV1N4964CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener series, engineered specifically for failure-intolerant systems where hermetic sealing, radiation tolerance, and extreme temperature resilience are mandatory.
FAQ
What is the Zener voltage tolerance of JANTXV1N4964CUS/TR?
The JANTXV1N4964CUS/TR has a nominal Zener voltage of 18 V with ±1% tolerance, confirmed by the "C" suffix per Microsemi SD44A datasheet. This tight tolerance ensures output stability within ±180 mV across manufacturing lot, temperature, and lifetime - critical for closed-loop feedback circuits where gain accuracy depends on reference precision. The JANTXV1N4964CUS/TR achieves this via laser-trimmed junction characterization during final test.
Does JANTXV1N4964CUS/TR require a heatsink in 5 W operation?
No external heatsink is required for JANTXV1N4964CUS/TR at 5 W dissipation when mounted on standard 1 oz. copper PCB pads per the D-5B footprint, because its thermal resistance is specified at 7°C/W junction-to-end-cap. At TEC = 140°C, the junction temperature remains within the -65°C to +175°C limit even with 30°C ambient rise. The JANTXV1N4964CUS/TR relies on direct end-cap solder joint conduction rather than case-to-PCB convection.
Is JANTXV1N4964CUS/TR compatible with lead-free reflow profiles?
Yes - the JANTXV1N4964CUS/TR uses Sn/Pb-finished copper end caps and is qualified for standard Pb-free reflow profiles (peak 260°C, 60 sec max), as documented in Microsemi's process compatibility notes. Its voidless glass body prevents cracking or delamination during thermal cycling. However, the JANTXV1N4964CUS/TR retains Sn/Pb terminations; full RoHS compliance requires verification of Pb content exemptions under J-STD-609.
What is the maximum reverse leakage current for JANTXV1N4964CUS/TR?
The maximum reverse leakage current for JANTXV1N4964CUS/TR is 5 μA at 13.7 V (85% of VZ), measured at 25°C per the SD44A datasheet. This ultra-low IR ensures minimal power loss in high-impedance bias networks and preserves battery life in always-on telemetry circuits. The JANTXV1N4964CUS/TR maintains <50 μA leakage even at +125°C, verified across 100% screening.
How does JANTXV1N4964CUS/TR differ from commercial 1N4964 variants?
The JANTXV1N4964CUS/TR differs from commercial 1N4964 variants in three key ways: it is screened to JANTXV level per MIL-PRF-19500/356, features voidless hermetic glass packaging (not molded plastic), and includes Category I metallurgical bonding for shock/vibration survivability. Commercial versions lack radiation hardness, have wider tolerances, and are not tested for extended temperature operation - making the JANTXV1N4964CUS/TR the only qualified option for flight hardware.
JANTXV1N4964CUS/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:
- ±2%
- 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
JANTXV1N4964CUS/TR FAQ
1.How can I place an order for JANTXV1N4964CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4964CUS/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 JANTXV1N4964CUS/TR reliable?
The price and inventory of JANTXV1N4964CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4964CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4964CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4964CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4964CUS/TR?
JANTXV1N4964CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4964CUS/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 JANTXV1N4964CUS/TR?
For technical support, including JANTXV1N4964CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4964CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4964CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4964CUS/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 JANTXV1N4964CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4964CUS/TR?
All JANTXV1N4964CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4964CUS/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 JANTXV1N4964CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4964CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4964CUS/TR Tags
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