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Microchip Technology JANTXV1N4964DUS/TR
- Part No.:
- JANTXV1N4964DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4964DUS/TR.pdf
- Description:
- DIODE ZENER 18V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,020
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Product details
Overview
JANTXV1N4964DUS/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 ±1% (D suffix), 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 overvoltage clamp in radiation-hardened avionics power conditioning circuits.
For engineers reviewing the JANTXV1N4964DUS/TR datasheet, JANTXV1N4964DUS/TR pinout, JANTXV1N4964DUS/TR application, or JANTXV1N4964DUS/TR equivalent, this part delivers verified 18 V regulation stability across wide current (10–50% IZM) and temperature extremes, meets MIL-PRF-19500/356 Class V requirements, and supports high-reliability design where failure tolerance is non-negotiable.
Technical Context
This Zener operates in reverse breakdown with tightly controlled voltage regulation (ΔVZ ≤ 0.75 V between 10% and 50% of IZM), enabled by voidless-glass hermetic sealing and Category I internal metallurgical bonds. Its thermal resistance is 7 °C/W junction-to-end-cap, supporting stable operation up to 175 °C junction temperature.
The device exhibits low dynamic impedance (4.0 Ω @ 65 mA), minimal temperature coefficient (+0.085 %/°C), and robust surge capability (9.0 A @ 8.3 ms), making it suitable for transient suppression and reference stabilization in harsh-environment analog power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±1% at 65 mA - enables precise 18 V rail regulation with minimal drift under load variation |
| Power Dissipation | 5 W @ TEC = 140 °C - defines maximum continuous thermal load before derating begins |
| Dynamic Impedance (ZZ) | 4.0 Ω @ IZT = 65 mA - ensures <100 mV output deviation for ±10 mA current step changes |
| Max Reverse Leakage (IR) | 5 μA @ VR = 13.7 V - guarantees negligible standby current in high-impedance bias networks |
| Surge Current (IZSM) | 9.0 A @ 8.3 ms - withstands common lightning-induced transients per MIL-STD-461 |
| Temp Coefficient (αVZ) | +0.085 %/°C - predicts <±150 mV total drift over −65 °C to +125 °C operating range |
| Junction Temp Range | −65 °C to +175 °C - supports deployment in space-grade thermal cycling environments |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps finished in Sn/Pb, 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 / low-side reference node | Connected to circuit ground or lowest potential point during Zener operation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 18 V reference when biased above breakdown with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and long-term parameter drift in vacuum or humid environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle reliability >1000 cycles between −65 °C and +175 °C |
| Triple-layer passivation | Prevents surface leakage paths and enhances stability under ionizing radiation exposure |
| MIL-PRF-19500/356 JANTXV qualification | Validates screening, testing, and traceability for Class V (space-level) mission-critical applications |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift-reduces handling precautions in cleanroom assembly |
Applications
| Avionics Power Conditioning | Satellite Bus Voltage Reference |
|---|---|
|
Use Scenario: Regulating 18 V primary bus in radiation-exposed satellite power distribution units. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and overvoltage clamp. Use Value: Maintains ±1% output accuracy over −55 °C to +125 °C while surviving 100 krad(Si) TID exposure per MicroNote 050. |
Use Scenario: Providing stable 18 V reference for ADC biasing and sensor excitation in LEO spacecraft payloads. IC Role / Device Role / Timing Role: Precision shunt regulator establishing absolute voltage baseline for analog signal chains. Use Value: Delivers <4.0 Ω dynamic impedance to minimize noise coupling into 24-bit SAR ADC reference inputs. |
| Tactical Radio RF Stage Bias | Nuclear Instrumentation Front-End |
|
Use Scenario: Stabilizing drain bias for GaN PA stages in man-portable HF/VHF radios operating in desert thermal extremes. IC Role / Device Role / Timing Role: Zener-based current source providing temperature-compensated gate bias. Use Value: +0.085 %/°C tempco matches GaN FET threshold drift, reducing gain compression over −40 °C to +85 °C. |
Use Scenario: Clamping detector amplifier input in neutron flux monitoring systems exposed to gamma fields. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting front-end op-amps from pulse-induced latch-up. Use Value: 9.0 A 8.3 ms surge rating absorbs single-event transients without degradation in 1 MeV neutron environments. |
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 | Same 18 V ±1% rating but no TR (tape-and-reel) packaging; bulk or ammo pack only | Lacks automated placement compatibility; requires manual loading or re-taping for SMT lines | Select JANTXV1N4964DUS/TR when using pick-and-place equipment with EIA-481-B feeders |
| CDP184964DUS/TR | Commercial-grade version (non-military); same electrical specs but no MIL-PRF-19500 screening or radiation hardening | Not qualified for flight hardware or nuclear instrumentation; limited to ground-test or benign-environment prototypes | Choose CDP184964DUS/TR only for cost-sensitive development boards where radiation tolerance is unnecessary |
Compared with JANTXV1N4964US and CDP184964DUS/TR, the JANTXV1N4964DUS/TR uniquely combines tape-and-reel delivery, full JANTXV screening, and documented radiation hardness-making it the sole option for production-ready space and defense electronics requiring zero-risk voltage reference stability.
Availability
JANTXV1N4964DUS/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite bus voltage reference, and nuclear instrumentation front-end designs requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4964DUS/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The JANTXV1N4964DUS/TR belongs to Microsemi's military-qualified Zener diode family designed specifically for fail-safe voltage regulation in mission-critical systems where parameter stability under thermal, radiation, and mechanical stress is mandatory.
FAQ
What is the Zener voltage tolerance of JANTXV1N4964DUS/TR?
The JANTXV1N4964DUS/TR has a Zener voltage tolerance of ±1%, indicated by the "D" suffix in the part number. This corresponds to a nominal 18 V regulation point with a guaranteed range of 17.82 V to 18.18 V at 65 mA test current and 25 °C ambient, verified per MIL-PRF-19500/356 screening.
Does JANTXV1N4964DUS/TR meet MIL-PRF-19500/356 requirements?
Yes, JANTXV1N4964DUS/TR is fully qualified to MIL-PRF-19500/356 Class V (JANTXV level), including rigorous environmental stress screening, burn-in, and parametric testing. Its voidless-glass construction, Category I metallurgical bond, and triple-layer passivation are all specified to meet this standard.
What is the maximum continuous Zener current for JANTXV1N4964DUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4964DUS/TR is 9.0 A, calculated from its 5 W power rating and 18 V Zener voltage (IZM = PZ / VZ). This value assumes operation at 140 °C end-cap temperature, with linear derating to zero at 175 °C junction temperature.
Is JANTXV1N4964DUS/TR radiation hardened?
Yes, JANTXV1N4964DUS/TR is inherently radiation hard, as documented in Microsemi MicroNote 050. Its voidless-glass hermetic seal and tungsten slug construction provide proven tolerance to total ionizing dose (TID) up to 100 krad(Si) and resilience against single-event effects in space and nuclear environments.
What package type does JANTXV1N4964DUS/TR use?
JANTXV1N4964DUS/TR uses the "E" package (also known as D-5B), a surface-mount hermetically sealed voidless glass case with copper end caps and Sn/Pb finish. It features cathode identification via a band and complies with EIA-481-B tape-and-reel standards for automated assembly.
JANTXV1N4964DUS/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:
- ±1%
- 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
JANTXV1N4964DUS/TR FAQ
1.How can I place an order for JANTXV1N4964DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4964DUS/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 JANTXV1N4964DUS/TR reliable?
The price and inventory of JANTXV1N4964DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4964DUS/TR is usually 5 days.
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Once your JANTXV1N4964DUS/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 JANTXV1N4964DUS/TR?
For technical support, including JANTXV1N4964DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4964DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4964DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4964DUS/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 JANTXV1N4964DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4964DUS/TR?
All JANTXV1N4964DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4964DUS/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 JANTXV1N4964DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4964DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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