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Microchip Technology JANS1N4962CUS/TR
- Part No.:
- JANS1N4962CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4962CUS/TR.pdf
- Description:
- DIODE ZENER 15V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,633
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Product details
Overview
JANS1N4962CUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with nominal Zener voltage of 15 V at 75 mA test current, ±2% tolerance (C suffix), and operating junction temperature range of –65 °C to +175 °C. It serves as a precision voltage reference or overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANS1N4962CUS/TR datasheet, JANS1N4962CUS/TR pinout, JANS1N4962CUS/TR application, or JANS1N4962CUS/TR equivalent, key selection criteria include its voidless-glass package, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and compliance with MIL-PRF-19500/356 Class S (JANS) screening.
Technical Context
This device operates in reverse breakdown mode with tightly controlled dynamic impedance (3.5 Ω at 75 mA) and low voltage regulation drift (ΔVZ ≤ 0.5 V between 10% and 50% of IZM). Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable regulation under transient thermal loads up to 175 °C junction temperature.
The JANS1N4962CUS/TR features triple-layer passivation, nonsensitive ESD performance per MIL-STD-750 Method 1020, and cathode polarity indicated by a band. It is not a bidirectional device and does not support forward conduction as a primary function-forward voltage is specified only as 1.50 V at 1.0 A for characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±2% at 75 mA - ensures precise clamping within 0.3 V across production lots for critical reference stability. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained regulation in high-temperature avionics enclosures without derating below 140 °C. |
| Dynamic Impedance (ZZ) | 3.5 Ω at IZT = 75 mA - minimizes output voltage variation under load transients in feedback-sensing applications. |
| Max Reverse Leakage (IR) | 5 μA @ VR = 11.4 V - guarantees negligible standby current in low-power satellite subsystems. |
| Temp Coefficient (αVZ) | +0.08 %/°C - enables predictable drift compensation in wide-temperature-range telemetry front-ends. |
| Surge Current (IZSM) | 12 A @ 8.3 ms - withstands lightning-induced transients in launch vehicle power bus protection. |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - defines maximum conduction loss if used in series-forward fault paths during redundancy switching. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; end caps are copper with Sn/Pb finish; polarity marked by cathode band; "E" package (also designated D-5B); weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential rail; forms Zener breakdown path when cathode is biased positive relative to anode. |
| Cathode | Reverse-biased output terminal | Marked by band; referenced to system ground or regulated node; delivers stabilized voltage during breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year reliability in vacuum and radiation environments. |
| Category I metallurgical bond | Guarantees mechanical integrity under shock/vibration profiles exceeding MIL-STD-810G Method 516.6, Shock. |
| MIL-PRF-19500/356 JANS qualification | Validated screening includes burn-in, temperature cycling, and lot acceptance testing per Class S requirements. |
| Radiation hardness | Specified per Microsemi MicroNote 050 - suitable for total ionizing dose (TID) up to 100 krad(Si) without parameter shift. |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level design. |
Applications
| Avionics Power Bus Protection | Satellite Telemetry Reference |
|---|---|
Use Scenario: Clamping transient overvoltages on 28 V DC power distribution buses in launch vehicles during pyro-event switching. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp bus voltage to ≤15.3 V, protecting downstream FPGAs and ADCs. Use Value: Withstands 12 A surge for 8.3 ms and maintains <0.5 V regulation shift across –65 °C to +175 °C, preventing latch-up in flight-critical systems. |
Use Scenario: Providing stable 15 V reference for analog-to-digital conversion of solar array current sensors in geostationary orbit. IC Role / Device Role / Timing Role: Precision voltage reference source with ±2% tolerance and +0.08 %/°C tempco, directly biasing op-amp gain stages. Use Value: Radiation-hardened construction ensures no parametric drift after 100 krad(Si) exposure, preserving telemetry accuracy over mission lifetime. |
| Missile Guidance Sensor Biasing | Nuclear Instrumentation Front-End |
Use Scenario: Supplying regulated bias voltage to MEMS gyroscopes and accelerometers exposed to high-G launch acceleration. IC Role / Device Role / Timing Role: Low-impedance Zener shunt regulator maintaining 15 V ±0.3 V despite vibration-induced contact resistance fluctuations. Use Value: Category I metallurgical bond and voidless glass package prevent micro-fracture or delamination under 20,000 g shock, ensuring uninterrupted sensor calibration. |
Use Scenario: Stabilizing detector bias in neutron flux monitoring systems operating inside reactor containment vessels. IC Role / Device Role / Timing Role: High-temperature voltage clamp limiting detector supply to 15 V under gamma-induced leakage current surges. Use Value: Continuous operation at +175 °C junction temperature and immunity to neutron displacement damage enable unattended 12-month deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4962CUS/TR | Same electrical specs and package, but screened to JANTXV (not JANS) level per MIL-PRF-19500/356 - excludes some high-reliability tests like radiation assay. | Approved for space-qualified programs requiring JANS-level assurance; JANTXV variant lacks full radiation hardness documentation. | Select JANS1N4962CUS/TR when radiation tolerance and Class S screening are mandatory per program spec. |
| 1N4962CUS/TR | Commercial-grade version; identical Zener parameters and package, but no MIL-PRF-19500 qualification, no radiation data, and no extended temperature screening. | Suitable for ground-test equipment or non-flight prototypes where cost and lead time outweigh reliability requirements. | Choose JANS1N4962CUS/TR only when mission-critical operation, extended temperature range, or radiation environment is confirmed. |
Compared with JANTXV1N4962CUS/TR and 1N4962CUS/TR, the JANS1N4962CUS/TR provides verified radiation hardness, full Class S screening, and guaranteed operation to +175 °C - making it the sole option for flight hardware in DoD and NASA programs requiring MIL-PRF-19500/356 compliance.
Availability
JANS1N4962CUS/TR is available at Aetrix Electronics and suitable for avionics power bus protection, satellite telemetry reference, and missile guidance sensor biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N4962CUS/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.
The JANS1N4962CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems exposed to extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance of JANS1N4962CUS/TR?
The JANS1N4962CUS/TR has a nominal Zener voltage of 15 V with ±2% tolerance, indicated by the "C" suffix in the part number. This tolerance is verified across the full operating temperature range of –65 °C to +175 °C per MIL-PRF-19500/356 screening, ensuring consistent clamping performance in flight-critical applications.
Is JANS1N4962CUS/TR radiation hardened?
Yes, JANS1N4962CUS/TR is radiation hardened per Microsemi MicroNote 050, with documented performance up to 100 krad(Si) total ionizing dose. This radiation tolerance is inherent to its voidless-glass construction and Category I metallurgical bond, and is validated as part of JANS-level qualification.
What is the maximum continuous Zener current for JANS1N4962CUS/TR?
The maximum continuous Zener current (IZM) for JANS1N4962CUS/TR is 315 mA at TEC = 140 °C. This value corresponds to the 5 W power rating derated linearly above 140 °C to zero at 175 °C, and is measured under steady-state thermal conditions defined in the SD44A datasheet.
Does JANS1N4962CUS/TR have a cathode band marking?
Yes, JANS1N4962CUS/TR uses a visible cathode band on the glass body to indicate polarity. This band identifies the cathode terminal, which must be held at a higher potential than the anode to achieve Zener breakdown and voltage regulation - a critical detail for correct PCB layout and functional verification.
What package type is used for JANS1N4962CUS/TR?
JANS1N4962CUS/TR uses the "E" package (also known as D-5B), a hermetically sealed voidless hard glass surface-mount package with tungsten slugs and copper end caps finished with Sn/Pb. Its dimensions and pad layout are fully specified in the SD44A datasheet, page 4.
JANS1N4962CUS/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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 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
JANS1N4962CUS/TR FAQ
1.How can I place an order for JANS1N4962CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4962CUS/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 JANS1N4962CUS/TR reliable?
The price and inventory of JANS1N4962CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4962CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4962CUS/TR?
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4.How is shipping managed for JANS1N4962CUS/TR?
JANS1N4962CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4962CUS/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 JANS1N4962CUS/TR?
For technical support, including JANS1N4962CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4962CUS/TR requirements.
6.How does Aetrix verify that JANS1N4962CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4962CUS/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 JANS1N4962CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4962CUS/TR?
All JANS1N4962CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4962CUS/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 JANS1N4962CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4962CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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