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Microchip Technology JANTX1N4964DUS/TR
- Part No.:
- JANTX1N4964DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4964DUS/TR.pdf
- Description:
- DIODE ZENER 18V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,658
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Product details
Overview
JANTX1N4964DUS/TR from Microsemi is a military-qualified, 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 regulation element in high-reliability power supply and protection circuits.
For engineers reviewing the JANTX1N4964DUS/TR datasheet, JANTX1N4964DUS/TR pinout, JANTX1N4964DUS/TR application, or JANTX1N4964DUS/TR equivalent, key selection criteria include its 1% voltage tolerance, voidless-glass hermetic construction, Category I metallurgical bond, radiation-hardened behavior per MicroNote 050, and compliance with MIL-PRF-19500/356 Class JANTX.
Technical Context
This device operates in reverse breakdown mode to maintain stable output voltage across wide current (10–50% of IZM) and temperature ranges. Its low dynamic impedance (4.0 Ω) and tight voltage regulation (ΔVZ ≤ 0.75 V between 10% and 50% IZM) ensure minimal output variation under load transients.
The "D" suffix confirms ±1% Zener voltage tolerance at 25 °C, and its "E" package (D-5B) uses tungsten slugs and copper end caps with Sn/Pb finish. Cathode polarity is marked by a band, and it exhibits ESD immunity per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18 V ±1% at IZT = 65 mA - enables precise voltage clamping in regulated supplies |
| Power Dissipation | 5 W @ TEC = 140 °C - supports high-stress operation without derating until 175 °C |
| Dynamic Impedance ZZ | 4.0 Ω @ IZT = 65 mA - ensures low output impedance for stable regulation under varying load |
| Max Reverse Leakage IR | 5 μA @ VR = 13.7 V - guarantees minimal quiescent current in standby or low-power modes |
| Temp Coefficient αVZ | +0.085 %/°C @ IZT - provides predictable, low-drift voltage reference over full military temp range |
| Surge Current IZSM | 9.0 A @ 8.3 ms - withstands transient overvoltage events such as EFT or inductive kickback |
| Forward Voltage VF | 1.50 V @ 1.0 A - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps, Sn/Pb finish, and cathode indicated by band. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in Zener regulator configuration | Provides low-resistance path for forward conduction; must be routed to minimize parasitic inductance in surge applications |
| Cathode | Current exit terminal in forward bias; connected to input voltage rail in Zener shunt regulator topology | Carries full Zener current during regulation; requires thermal relief and adequate copper area for 5 W dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture ingress-critical for long-term reliability in space and avionics |
| Category I metallurgical bond | Ensures mechanical integrity and thermal stability under extreme thermal cycling (–65 °C to +175 °C) |
| Triple-layer passivation | Prevents surface leakage and contamination-induced parameter drift in high-humidity or particle-rich environments |
| Radiation hardness per MicroNote 050 | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si), suitable for satellite systems |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift-reduces handling precautions and test screening overhead |
Applications
| Aerospace Power Conditioning | Defense Radar Bias Supply |
|---|---|
Use Scenario: Regulating auxiliary bias rails in phased-array radar transmit/receive modules exposed to wide thermal swings and vibration. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 18 V for GaN amplifier gate bias and op-amp support circuitry. Use Value: Maintains <±1% voltage accuracy across –55 °C to +125 °C ambient, enabling consistent RF gain and linearity without recalibration. |
Use Scenario: Clamping transient overvoltages on DC distribution buses in airborne electronic warfare subsystems. IC Role / Device Role / Timing Role: Primary overvoltage protection device absorbing 8.3 ms surges up to 9.0 A without degradation. Use Value: Survives repeated lightning-induced transients per DO-160 Section 22, eliminating need for external crowbar circuits. |
| Satellite Onboard Computer | Nuclear Instrumentation |
Use Scenario: Providing reference voltage for ADCs monitoring solar array telemetry in geostationary orbit. IC Role / Device Role / Timing Role: Precision voltage reference with radiation-hardened behavior per MicroNote 050. Use Value: Delivers stable 18 V output after 100 krad(Si) TID exposure-ensuring data integrity over 15-year mission life. |
Use Scenario: Stabilizing detector bias in reactor control rod position sensors operating inside containment vessels. IC Role / Device Role / Timing Role: High-reliability shunt regulator maintaining sensor head voltage despite gamma-induced leakage currents. Use Value: Zero parameter shift after 10⁶ rad(Si) neutron fluence-certified for Class 1E safety-critical instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4964DUS/TR | Higher screening level: JANTXV per MIL-PRF-19500/356 includes burn-in and extended environmental testing | Required for Class V applications where enhanced reliability validation is mandated (e.g., manned spacecraft) | Select JANTXV1N4964DUS/TR when full JANTXV qualification and lot traceability are contractually required |
| 1N4964DUS/TR (non-JAN) | No military qualification; commercial-grade screening only; same electrical specs and package | Suitable for industrial or test equipment where MIL-spec is not mandated | Choose 1N4964DUS/TR for cost-sensitive, non-military designs with identical performance needs |
Compared with JANTX1N4964DUS/TR, JANTXV1N4964DUS/TR adds burn-in and extended life testing for ultra-high-reliability missions, while 1N4964DUS/TR offers identical electrical behavior at lower cost for commercial-grade use-enabling tiered sourcing without redesign.
Availability
JANTX1N4964DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense radar bias supply, and satellite onboard computer applications requiring stable component supply, full traceability, and long-term obsolescence management.
Supply support for JANTX1N4964DUS/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 JANTX1N4964DUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener series, designed specifically for voltage regulation and transient suppression in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTX1N4964DUS/TR?
JANTX1N4964DUS/TR has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number. This means its nominal 18 V Zener voltage is guaranteed between 17.82 V and 18.18 V at 25 °C and IZT = 65 mA. The JANTX1N4964DUS/TR maintains this tolerance across its full operating temperature range due to its specified temperature coefficient of +0.085 %/°C.
Is JANTX1N4964DUS/TR hermetically sealed?
Yes, JANTX1N4964DUS/TR features voidless hermetically sealed glass construction per MIL-PRF-19500/356. Its "E" package uses a hard glass envelope with internal tungsten slugs and metallurgical Category I bonds, ensuring zero moisture ingress and long-term parameter stability in harsh environments including vacuum, high humidity, and thermal cycling.
What is the maximum continuous Zener current for JANTX1N4964DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4964DUS/TR is 294 mA at TEC = 140 °C. This value is derived from its 5 W power rating and 18 V nominal Zener voltage (IZM = PD/VZ). Derating is linear above 140 °C, reaching zero at 175 °C junction temperature.
Does JANTX1N4964DUS/TR meet radiation hardness requirements?
Yes, JANTX1N4964DUS/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050. It is characterized for total ionizing dose (TID) tolerance up to 100 krad(Si) with no functional degradation or parameter shift-making it suitable for low-earth orbit and deep-space satellite applications where radiation exposure is unavoidable.
What packaging format is used for JANTX1N4964DUS/TR?
JANTX1N4964DUS/TR is supplied in tape-and-reel format compliant with EIA-481-B standards. Its "E" package (also known as D-5B) is a surface-mount glass diode outline with copper end caps finished in tin/lead (Sn/Pb), cathode identified by a band, and weight of 539 mg. No marking is applied to the case per specification.
JANTX1N4964DUS/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
JANTX1N4964DUS/TR FAQ
1.How can I place an order for JANTX1N4964DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4964DUS/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 JANTX1N4964DUS/TR reliable?
The price and inventory of JANTX1N4964DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4964DUS/TR is usually 5 days.
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JANTX1N4964DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4964DUS/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 JANTX1N4964DUS/TR?
For technical support, including JANTX1N4964DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4964DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4964DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4964DUS/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 JANTX1N4964DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4964DUS/TR?
All JANTX1N4964DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4964DUS/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 JANTX1N4964DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4964DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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