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Microchip Technology JANTX1N4960DUS/TR
- Part No.:
- JANTX1N4960DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4960DUS/TR.pdf
- Description:
- DIODE ZENER 12V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,892
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Product details
Overview
JANTX1N4960DUS/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 12 V ±5%, dynamic impedance of 2.5 Ω at 100 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 high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4960DUS/TR datasheet, JANTX1N4960DUS/TR pinout, JANTX1N4960DUS/TR application, or JANTX1N4960DUS/TR equivalent, this part is selected for MIL-PRF-19500/356-compliant systems requiring radiation-hardened, voidless-glass Zener regulation with stable VZ across wide thermal and current ranges.
Technical Context
This device belongs to the 1N4954US–1N4996US family of glass-passivated, surface-mount Zener regulators. It uses an internal Category I metallurgical bond and triple-layer passivation to ensure reliability under extreme thermal cycling and radiation exposure.
Its Zener breakdown mechanism delivers regulated voltage with ΔVZ ≤ 0.7 V between 10% and 50% of IZM, and exhibits low temperature coefficient (±0.07 %/°C) and ESD immunity per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 12 V ±5% at IZT = 100 mA - defines stable regulation point for biasing and reference circuits |
| Power Dissipation (PZ) | 5 W @ TEC = 140 °C - supports continuous operation in high-temperature avionics enclosures |
| Dynamic Impedance (ZZT) | 2.5 Ω @ IZT = 100 mA - ensures minimal output voltage deviation under load transients |
| Max Reverse Leakage (IR) | 10 μA @ VR = 9.1 V - guarantees low standby current in battery-backed systems |
| Operating Temperature (TJ) | −65 °C to +175 °C - enables deployment in space-grade and jet-engine-mounted electronics |
| Thermal Resistance (RθJC) | 7 °C/W junction-to-end-cap - allows accurate thermal modeling for PCB copper pour design |
| Surge Current (IZSM) | 18 A @ 8.3 ms - withstands lightning-induced transients without degradation |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" package (also designated D-5B); cathode indicated by band; end caps are copper with Sn/Pb finish; weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener knee reference | Connected to lower-potential node; used for forward-bias testing and leakage characterization |
| Cathode | Zener breakdown terminal / regulated output reference | Connected to higher-potential node; provides stable 12 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and long-term parameter drift in humid or vacuum environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal stability under repeated thermal shock (−65 °C ↔ +175 °C) |
| Triple-layer passivation | Prevents surface contamination and leakage path formation on glass surface during mission life |
| MIL-PRF-19500/356 qualification (JANTX) | Validates compliance with screening, testing, and traceability requirements for Class S space applications |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling and assembly without special grounding protocols in cleanroom or field depots |
Applications
| Avionics Power Bus Regulation | Satellite Command Decoder Reference |
|---|---|
Use Scenario: Stabilizing 12 V rail in flight control computer power supply under wide ambient temperature swings and vibration. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream LDOs and ADC references. Use Value: Maintains <±1% output stability over −55 °C to +125 °C ambient due to low αVZ and robust thermal resistance. |
Use Scenario: Providing precise 12 V bias for radiation-tolerant FPGA configuration circuitry in low-earth-orbit satellites. IC Role / Device Role / Timing Role: Primary voltage reference for analog monitoring and reset threshold generation. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in TID environments up to 100 krad(Si). |
| Tactical Radio Transceiver Protection | Missile Seeker Signal Conditioning |
Use Scenario: Clamping transient surges on 12 V DC input of handheld HF/VHF radios exposed to EMP and EFT events. IC Role / Device Role / Timing Role: Surge suppression element placed upstream of DC-DC converters and RF front-end ICs. Use Value: Withstands 18 A 8.3 ms surge without parametric shift, verified per MIL-STD-704F transient profiles. |
Use Scenario: Biasing infrared detector preamplifier stages in guided munition seeker heads subject to rapid thermal transients. IC Role / Device Role / Timing Role: Stable DC reference source for gain-setting networks and offset calibration. Use Value: −65 °C to +175 °C operation enables uninterrupted function during missile motor ignition and atmospheric re-entry cooling phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4960DUS/TR | Higher screening level (JANTXV vs. JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 Class V | Required for Class V space missions where single-event burnout (SEB) margin must exceed 40 V | Select JANTXV version when full MIL-PRF-19500/356 Class V screening and extended radiation testing are mandated |
| 1N4960US | Commercial-grade (non-military); no JAN/JANTX/JANTXV prefix; same electrical specs but no MIL screening or traceability | Suitable only for non-critical industrial or test equipment where radiation tolerance and long-term reliability are not required | Choose 1N4960US for cost-sensitive prototyping or ground-support equipment where MIL qualification is unnecessary |
Compared with JANTX1N4960DUS/TR, JANTXV1N4960DUS/TR adds Class V screening for enhanced radiation survivability and lot traceability, while 1N4960US omits all military screening-making it unsuitable for flight hardware but viable for bench validation.
Availability
JANTX1N4960DUS/TR is available at Aetrix Electronics and suitable for avionics power regulation, satellite reference design, and missile seeker conditioning requiring stable component supply under ITAR-controlled logistics and long-lifecycle support.
Supply support for JANTX1N4960DUS/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, with emphasis on radiation-hardened and high-temperature performance.
The JANTX1N4960DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356-qualified Zener diode product line, engineered specifically for voltage reference and transient protection in mission-critical electronic systems operating under extreme environmental stress.
FAQ
What is the Zener voltage tolerance for JANTX1N4960DUS/TR?
JANTX1N4960DUS/TR has a nominal Zener voltage of 12 V with a standard tolerance of ±5%, as defined in the MIL-PRF-19500/356 specification and confirmed in the SD44A datasheet. This tolerance applies at IZT = 100 mA and TA = 25 °C. No tighter tolerance suffix (e.g., 'C' or 'D') is present in the part number, so ±5% is the guaranteed limit.
Is JANTX1N4960DUS/TR compatible with lead-free solder reflow processes?
JANTX1N4960DUS/TR features tin/lead (Sn/Pb) terminations per the datasheet, and its glass package is rated for peak reflow temperatures up to 260 °C for ≤10 seconds. While it can survive lead-free reflow profiles, Microsemi does not qualify it for Pb-free assembly; use with Sn/Pb solder is recommended to maintain full MIL-PRF-19500/356 compliance and avoid intermetallic growth risks.
What is the maximum continuous Zener current for JANTX1N4960DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4960DUS/TR is 395 mA, calculated from its 5 W power rating and 12 V nominal Zener voltage (IZM = PZ/VZ). This value is validated at TEC = 140 °C and assumes proper PCB thermal relief per the D-5B pad layout in the SD44A datasheet.
Does JANTX1N4960DUS/TR require derating above 140 °C end-cap temperature?
Yes - JANTX1N4960DUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. Derating slope is −71.4 mW/°C (5 W ÷ 70 °C), as specified in the Maximum Ratings table of SD44A. This reflects the thermal resistance of 7 °C/W from junction to end-cap.
How is polarity identified on JANTX1N4960DUS/TR?
JANTX1N4960DUS/TR uses a cathode band marking on the glass body to indicate polarity. The banded end is the cathode; the unmarked end is the anode. This matches JEDEC-standard orientation for surface-mount Zener diodes and is consistent across the 1N4954US–1N4996US series per the SD44A mechanical drawings.
JANTX1N4960DUS/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):
- 12 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 9.1 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
JANTX1N4960DUS/TR FAQ
1.How can I place an order for JANTX1N4960DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4960DUS/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 JANTX1N4960DUS/TR reliable?
The price and inventory of JANTX1N4960DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4960DUS/TR is usually 5 days.
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JANTX1N4960DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4960DUS/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 JANTX1N4960DUS/TR?
For technical support, including JANTX1N4960DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4960DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4960DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4960DUS/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 JANTX1N4960DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4960DUS/TR?
All JANTX1N4960DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4960DUS/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 JANTX1N4960DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4960DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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