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Microchip Technology JANS1N4964CUS/TR
- Part No.:
- JANS1N4964CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4964CUS/TR.pdf
- Description:
- DIODE ZENER 18V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,878
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Product details
Overview
JANS1N4964CUS/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 operating junction temperature range of –65 °C to +175 °C. It serves as a precision voltage reference or shunt regulator in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANS1N4964CUS/TR datasheet, JANS1N4964CUS/TR pinout, JANS1N4964CUS/TR application, or JANS1N4964CUS/TR equivalent, key selection criteria include its voidless-glass package, Category III metallurgical bond, radiation-hardened construction per MicroNote 050, and compliance with MIL-PRF-19500/356 for JAN/JANS qualification.
Technical Context
This device belongs to the 1N4954US–1N4996US family and uses a hard-glass, voidless hermetic enclosure with tungsten slugs and copper end caps finished in Sn/Pb. Its internal Category III metallurgical bond ensures mechanical robustness under thermal cycling and shock.
It operates as a shunt regulator with dynamic impedance of 4.0 Ω at IZT = 65 mA, reverse leakage ≤5 μA at VR = 13.7 V, and forward voltage ≤1.5 V at IF = 1.0 A. Temperature coefficient is +0.085 %/°C, enabling stable regulation across extreme ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±1% at IZT = 65 mA - defines precise regulation point for feedback or reference circuits |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in conduction-cooled military chassis |
| Dynamic Impedance (ZZ) | 4.0 Ω at IZT - ensures low output impedance for stable voltage under load transients |
| Max Reverse Leakage (IR) | 5 μA at VR = 13.7 V - minimizes standby current in battery-backed or low-power systems |
| Junction Temp Range | –65 °C to +175 °C - enables deployment in engine bays, space payloads, and downhole electronics |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal path to PCB copper or heatsink without solder voids |
| Surge Current (IZSM) | 9.0 A @ 8.3 ms - withstands lightning-induced transients in avionics power rails |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with cathode indicated by band; end caps are copper with Sn/Pb finish; weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal in reverse bias | Connected to lower-potential node; forms shunt path when VIN exceeds VZ |
| Cathode | Current source terminal in reverse bias | Marked with band; connected to regulated output or reference node |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination under 100% humidity or vacuum |
| Category III metallurgical bond | Guarantees interfacial integrity during 1000+ thermal cycles between –65 °C and +175 °C |
| Radiation hardness | Qualified per Microsemi MicroNote 050 for total ionizing dose >100 krad(Si) |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
| MIL-PRF-19500/356 qualification | JANS grade confirms screening for burn-in, temperature cycling, and lot acceptance testing |
Applications
| Aerospace Power Bus Regulation | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Regulating 28 V DC bus in satellite power distribution units subject to radiation and thermal vacuum. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining stable 18 V reference for ADC bias and op-amp supplies. Use Value: 0.085 %/°C tempco and 4.0 Ω dynamic impedance ensure <±0.5% output drift over –55 °C to +125 °C operational range. |
Use Scenario: Providing precision 18 V reference in high-temperature logging tools deployed at 175 °C wellbore environments. IC Role / Device Role / Timing Role: Primary voltage reference for sensor excitation and analog front-end calibration. Use Value: Hermetic voidless-glass construction prevents parametric shift after 1000 hrs at 175 °C per MIL-STD-883 TM 1008.1. |
| Avionics Flight Control Interface | Tactical Radio RF Power Amplifier Bias |
Use Scenario: Stabilizing gate bias voltage for FET drivers in fly-by-wire actuator control modules. IC Role / Device Role / Timing Role: Zener clamp protecting gate drive circuitry from transient overvoltage events. Use Value: 9.0 A surge rating at 8.3 ms enables compliance with DO-160 Section 22 lightning-induced transient immunity. |
Use Scenario: Setting fixed bias point for GaN HEMT amplifiers in manpack radios operating across desert and arctic climates. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 18 V supply for RF IC bias networks. Use Value: ±1% tolerance and <5 μA leakage at 13.7 V minimize quiescent current error and thermal drift in Class AB stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4964CUS/TR | Same electrical specs but screened to JANTXV level (enhanced burn-in, 100% parametric test) | Required for flight-critical subsystems where zero-defect reliability is mandated | Select when full JANTXV screening per MIL-PRF-19500/356 is contractually required |
| 1N4964US | Commercial-grade version; no MIL-qualified screening; same package and Zener parameters | Suitable for ground-test equipment or non-flight hardware with relaxed reliability requirements | Choose for cost-sensitive prototyping or non-mission-critical industrial use |
Compared with JANS1N4964CUS/TR, JANTXV1N4964CUS/TR adds extended life test coverage and tighter lot traceability, while 1N4964US omits military screening but retains identical Zener performance-making all three suitable for 18 V shunt regulation, yet differing in assurance level and lifecycle support.
Availability
JANS1N4964CUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, downhole instrumentation, avionics interface protection, and tactical radio biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N4964CUS/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 defense, aerospace, and industrial markets.
JANS1N4964CUS/TR belongs to Microsemi's military-qualified Zener diode product line, engineered specifically for mission-critical voltage regulation where hermeticity, radiation tolerance, and extreme-temperature stability are mandatory.
FAQ
What is the Zener voltage tolerance for JANS1N4964CUS/TR?
JANS1N4964CUS/TR has a nominal Zener voltage of 18 V with ±1% tolerance, indicated by the "C" suffix per Microsemi's standard coding. This tight tolerance is verified per MIL-PRF-19500/356 screening and applies across the full –65 °C to +175 °C operating range. The JANS1N4964CUS/TR maintains this specification under both steady-state and transient load conditions.
Does JANS1N4964CUS/TR require derating above 140 °C case temperature?
Yes, JANS1N4964CUS/TR must be derated linearly above 140 °C case temperature (TEC), reaching zero power at 175 °C. Its 5 W rating is specified only at TEC = 140 °C, and thermal resistance is 7 °C/W junction-to-end-cap. Engineers must calculate actual power based on measured end-cap temperature-not ambient-to avoid exceeding junction limits in JANS1N4964CUS/TR applications.
Is JANS1N4964CUS/TR compatible with lead-free reflow processes?
No, JANS1N4964CUS/TR features Sn/Pb terminations and is not qualified for lead-free reflow. Its copper end caps with tin/lead finish require peak reflow temperatures ≤235 °C and are incompatible with standard SAC305 profiles. Use of lead-free solder may compromise hermetic seal integrity and voidless-glass bond reliability in JANS1N4964CUS/TR assemblies.
What does the "JANS" prefix indicate for JANS1N4964CUS/TR?
The "JANS" prefix certifies that JANS1N4964CUS/TR meets the highest military screening level per MIL-PRF-19500/356, including extended burn-in, temperature cycling, and lot acceptance testing. It denotes full qualification for spaceflight and nuclear-hardened platforms-distinct from JANTX or JANTXV grades-and is traceable to individual wafer lots and assembly batches in JANS1N4964CUS/TR documentation.
Can JANS1N4964CUS/TR be used as a replacement for 1N4964US in existing designs?
JANS1N4964CUS/TR shares identical electrical parameters and D-5B package dimensions with 1N4964US, but adds full MIL-qualified screening and hermetic validation. While electrically interchangeable, JANS1N4964CUS/TR requires verification of solder profile compatibility (Sn/Pb vs. Pb-free) and updated qualification records. No PCB layout change is needed, but system-level radiation and thermal testing must be repeated for JANS1N4964CUS/TR integration.
JANS1N4964CUS/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
JANS1N4964CUS/TR FAQ
1.How can I place an order for JANS1N4964CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4964CUS/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 JANS1N4964CUS/TR reliable?
The price and inventory of JANS1N4964CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4964CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4964CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4964CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4964CUS/TR?
JANS1N4964CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4964CUS/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 JANS1N4964CUS/TR?
For technical support, including JANS1N4964CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4964CUS/TR requirements.
6.How does Aetrix verify that JANS1N4964CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4964CUS/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 JANS1N4964CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4964CUS/TR?
All JANS1N4964CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4964CUS/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 JANS1N4964CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4964CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N4964CUS/TR Tags
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