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Microchip Technology JANTX1N4963DUS/TR
- Part No.:
- JANTX1N4963DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4963DUS/TR.pdf
- Description:
- DIODE ZENER 16V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,475
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Product details
Overview
JANTX1N4963DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with a nominal Zener voltage of 16 V at 75 mA test current, ±1% tolerance (D suffix), 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 rails and analog signal conditioning circuits.
For engineers reviewing the JANTX1N4963DUS/TR datasheet, JANTX1N4963DUS/TR pinout, JANTX1N4963DUS/TR application, or JANTX1N4963DUS/TR equivalent, this part is selected for mission-critical voltage stabilization where long-term parametric stability, radiation hardness, and ESD insensitivity per MIL-STD-750 Method 1020 are required.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family and uses voidless hermetically sealed hard-glass construction with internal Category I metallurgical bonds. Its Zener breakdown mechanism delivers stable regulation across wide current (10%–50% IZM) and temperature ranges, with dynamic impedance of 3.5 Ω at 75 mA.
The "D" suffix denotes ±1% Zener voltage tolerance, and the "TR" indicates tape-and-reel packaging per EIA-481-B. The "JANTX" prefix confirms JAN-qualified screening per MIL-PRF-19500/356, including extended temperature cycling, burn-in, and lot acceptance testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.0 V ±1% at IZT = 75 mA - ensures tight output regulation in precision reference designs |
| Power Dissipation | 5 W @ TEC = 140 °C - supports high-stability operation without derating below 140 °C ambient at end cap |
| Dynamic Impedance (ZZ) | 3.5 Ω at IZT = 75 mA - minimizes output voltage variation under load transients |
| Max Reverse Leakage (IR) | 5 μA at VR = 12.2 V - guarantees low standby current in battery-backed or low-power systems |
| Temp Coefficient (αVZ) | +0.08 %/°C - enables predictable drift compensation in wide-temperature-range instrumentation |
| Surge Current (IZSM) | 10 A @ 8.3 ms - withstands short-duration line transients without degradation |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - defines conduction loss during forward-biased fault conditions |
Pinout & Package
Package: Hermetically sealed voidless glass case with tungsten slugs, "E" package (also designated D-5B), surface-mount configuration. End caps are copper with Sn/Pb finish; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; carries full surge/forward current during fault or bias conditions |
| Cathode | Zener breakdown terminal | Connected to regulated output node; establishes reference voltage at specified reverse bias current |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination, enabling >20-year operational life in harsh environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle reliability up to 1000 cycles between −65 °C and +175 °C |
| Nonsensitive to ESD | Passes MIL-STD-750 Method 1020 without protection circuitry - reduces BOM count in sensitive analog front ends |
| Inherent radiation hardness | Qualified per Microsemi MicroNote 050 - suitable for space-qualified power regulation without shielding overhead |
| Triple-layer passivation | Prevents surface leakage and parameter shift under high humidity or ionizing radiation exposure |
Applications
| Aerospace Power Conditioning | Military Avionics Reference |
|---|---|
|
Use Scenario: Regulating auxiliary 15–17 V DC bus in flight control computers exposed to −55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for ADC biasing and op-amp feedback networks. Use Value: Maintains ±0.16 V regulation over full temperature and current range, ensuring <0.01% gain error in sensor signal chains. |
Use Scenario: Stabilizing reference voltage for radar receiver local oscillator synthesizers in airborne EW systems. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean 16 V to PLL charge pump and VCO tuning circuitry. Use Value: Low 3.5 Ω dynamic impedance suppresses noise coupling into frequency synthesis paths, reducing phase jitter by >3 dB. |
| Satellite Power Management | Nuclear Instrumentation |
|
Use Scenario: Providing radiation-hardened voltage clamp on solar array regulator outputs in LEO missions. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing transient energy while maintaining stable rail voltage. Use Value: Withstands 10 A surge at 8.3 ms and retains parametric stability after 100 krad(Si) total ionizing dose exposure. |
Use Scenario: Establishing calibrated bias point for gamma-ray detector preamplifiers in reactor monitoring systems. IC Role / Device Role / Timing Role: Low-drift Zener reference defining gain-setting resistor network voltage. Use Value: +0.08 %/°C tempco allows accurate thermal compensation over 0–70 °C cabinet temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4963DUS/TR | Higher screening level (JANTXV vs JANTX): includes additional thermal shock, vibration, and radiographic inspection per MIL-PRF-19500/356 | Required for Class H (spaceflight) or Class K (nuclear survivability) programs where zero-defect reliability is mandated | Select when full JANTXV qualification and extended lot traceability are contractually required |
| 1N4963US | Commercial-grade version: no MIL-PRF-19500 screening, wider ±5% tolerance (no suffix), same electrical specs and package | Suitable for non-military industrial prototypes or cost-sensitive test fixtures where radiation/ESD immunity is not critical | Choose for early-stage development or non-safety-critical subsystems to reduce procurement lead time and cost |
Compared with JANTX1N4963DUS/TR, JANTXV1N4963DUS/TR adds process-level reliability assurance for extreme environments, while 1N4963US trades screening and tolerance for faster availability and lower unit cost in benign applications.
Availability
JANTX1N4963DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military avionics reference design, and satellite power management requiring stable component supply with guaranteed long-term obsolescence support.
Supply support for JANTX1N4963DUS/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 defense, aerospace, and industrial markets.
The JANTX1N4963DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode product line, engineered for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTX1N4963DUS/TR?
JANTX1N4963DUS/TR has a nominal Zener voltage of 16.0 V with ±1% tolerance, indicated by the "D" suffix in the part number. This tight tolerance is achieved through post-screening binning and verified during MIL-PRF-19500/356 qualification testing. The JANTX1N4963DUS/TR maintains this specification across its full operating temperature range of −65 °C to +175 °C.
Is JANTX1N4963DUS/TR compatible with lead-free solder reflow profiles?
JANTX1N4963DUS/TR features Sn/Pb-finished copper end caps and is qualified for traditional eutectic solder processes. While it can withstand peak reflow temperatures up to 235 °C for ≤60 seconds, Microsemi does not certify it for Pb-free assembly. For RoHS-compliant designs, JANTX1N4963DUS/TR requires process validation and may need alternative termination evaluation.
Does JANTX1N4963DUS/TR require external heat sinking?
No. JANTX1N4963DUS/TR is rated for 5 W dissipation at TEC = 140 °C without external heatsinking, relying on PCB copper area and end-cap thermal conduction. Its junction-to-end-cap thermal resistance is 7 °C/W. Adequate 1–2 oz. copper pour under both end caps is sufficient for full-power operation within the specified ambient envelope.
How is polarity identified on JANTX1N4963DUS/TR?
JANTX1N4963DUS/TR uses a cathode band marking on the glass body to indicate polarity. The banded end is the cathode, which must be connected to the higher-potential node in Zener regulation mode. The unmarked end is the anode. No alphanumeric marking is present per the datasheet specification for this variant.
What is the maximum continuous reverse current for JANTX1N4963DUS/TR?
The maximum continuous reverse (leakage) current for JANTX1N4963DUS/TR is 5 μA at VR = 12.2 V and TA = 25 °C. At elevated temperatures or higher reverse voltages, leakage increases predictably but remains below 25 μA across the full −65 °C to +175 °C range, supporting low-power standby operation in JANTX1N4963DUS/TR-based references.
JANTX1N4963DUS/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):
- 16 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 12.2 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
JANTX1N4963DUS/TR FAQ
1.How can I place an order for JANTX1N4963DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4963DUS/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 JANTX1N4963DUS/TR reliable?
The price and inventory of JANTX1N4963DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4963DUS/TR is usually 5 days.
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Once your JANTX1N4963DUS/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 JANTX1N4963DUS/TR?
For technical support, including JANTX1N4963DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4963DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4963DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4963DUS/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 JANTX1N4963DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4963DUS/TR?
All JANTX1N4963DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4963DUS/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 JANTX1N4963DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4963DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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