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Microchip Technology JANTX1N4963CUS/TR
- Part No.:
- JANTX1N4963CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4963CUS/TR.pdf
- Description:
- DIODE ZENER 16V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,006
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Product details
Overview
JANTX1N4963CUS/TR from Microsemi is a military-qualified, voidless hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 16 V, ±2% tolerance (C suffix), and 7 °C/W junction-to-end-cap thermal resistance. It operates from −65 °C to +175 °C and delivers stable voltage regulation in high-reliability power supply and reference circuits for aerospace and defense systems.
For engineers reviewing the JANTX1N4963CUS/TR datasheet, JANTX1N4963CUS/TR pinout, JANTX1N4963CUS/TR application, or JANTX1N4963CUS/TR equivalent, this part supports critical voltage clamping, overvoltage protection, and precision biasing where long-term 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 series, featuring Category I internal metallurgical bonds and triple-layer passivation. Its voidless hard-glass construction ensures hermetic sealing without internal cavities, enabling operation across extreme temperature ranges without parameter drift or seal failure.
The JANTX1N4963CUS/TR exhibits 3.5 Ω dynamic impedance at 75 mA test current, 1.1 V maximum reverse leakage at 12.2 V, and a temperature coefficient of +0.08 %/°C - confirming positive VZ drift with temperature, typical for mid-voltage Zeners in this family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.0 V ±2% at 75 mA - defines precise regulation point for feedback loops and reference rails. |
| Power Dissipation | 5 W @ TEC = 140 °C - requires heatsinking via end-cap mounting for full-power operation. |
| Dynamic Impedance (ZZT) | 3.5 Ω at IZT = 75 mA - low AC impedance ensures minimal output ripple under varying load current. |
| Max Reverse Leakage (IR) | 5 μA at VR = 12.2 V - guarantees negligible standby current in high-impedance bias networks. |
| Thermal Resistance (RθJC) | 7 °C/W junction-to-end-cap - enables accurate thermal modeling when mounted on copper pads or heat-spreading substrates. |
| Operating Temperature | −65 °C to +175 °C - supports deployment in engine bays, space-grade electronics, and downhole instrumentation. |
| Forward Voltage (VF) | 1.50 V at 1.0 A - confirms robust P-N junction integrity and low conduction loss during forward-bias transients. |
Pinout & Package
Package: Hermetically sealed voidless hard-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 in reverse-biased Zener operation; used for forward-clamp or surge path in bidirectional protection. |
| Cathode | Zener breakdown terminal | Connected to regulated voltage rail; band-marked end cap serves as primary heat-sinking interface and voltage reference node. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk over 20+ year field life in vacuum or humid environments. |
| Category I metallurgical bond | Ensures mechanical and thermal cycle reliability >1000 cycles between −65 °C and +175 °C without bond fatigue. |
| Triple-layer passivation | Provides immunity to ion contamination and surface leakage in high-humidity or salt-fog conditions. |
| Nonsensitive to ESD | Withstands ≥8 kV HBM per MIL-STD-750 Method 1020 - no external ESD protection required in board layout. |
| Inherent radiation hardness | Qualified per MicroNote 050 for total ionizing dose (TID) >100 krad(Si) - suitable for LEO and GEO satellite subsystems. |
Applications
| Aerospace Power Conditioning | Defense System Reference Voltage |
|---|---|
Use Scenario: Regulating auxiliary 15 V rail in satellite power distribution unit exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream DC-DC converters. Use Value: Maintains ±2% regulation across −65 °C to +125 °C ambient with <3.5 Ω dynamic impedance, minimizing transient-induced converter dropout. |
Use Scenario: Providing stable 16 V bias for analog front-end amplifiers in radar receiver modules. IC Role / Device Role / Timing Role: Precision shunt reference establishing gain-setting node for low-noise op-amps. Use Value: Delivers <5 μA leakage at 12.2 V and +0.08%/°C TC, reducing offset drift in wide-temperature military operating envelopes. |
| Downhole Instrumentation | Tactical Radio Bias Network |
Use Scenario: Voltage stabilization in high-temperature logging tools operating at 175 °C downhole. IC Role / Device Role / Timing Role: Primary shunt regulator for microcontroller and sensor supply rails. Use Value: Sustains 5 W dissipation at TEC = 140 °C with 7 °C/W RθJC, enabling direct copper-pad thermal coupling without heatsink. |
Use Scenario: Clamping RF amplifier gate voltage against supply transients in manpack radios. IC Role / Device Role / Timing Role: Transient voltage suppressor and DC bias stabilizer in GaN FET driver stage. Use Value: Withstands 10 A surge (8.3 ms) and exhibits <1.1 V leakage at 12.2 V, preventing false turn-on during ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4963CUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot traceability and extended burn-in per MIL-PRF-19500/356. | Required for Class V mission-critical avionics where single-point failure must be excluded. | Select when full JANTXV qualification and radiation test reports are mandated by system spec. |
| 1N4963US | Commercial-grade version; no MIL-PRF-19500 qualification, wider temp range (−65 °C to +150 °C), same electrical specs. | Suitable for industrial control or test equipment where cost and lead time outweigh military reliability needs. | Choose for non-military designs requiring identical Zener performance but without screening or traceability overhead. |
Compared with JANTX1N4963CUS/TR, JANTXV1N4963CUS/TR adds process controls for ultra-high reliability in life-critical systems, while 1N4963US provides identical regulation performance at lower cost and shorter lead time for commercial deployments.
Availability
JANTX1N4963CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference voltage generation, and downhole instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4963CUS/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 JANTX1N4963CUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in mission-critical systems where hermeticity, radiation tolerance, and extreme-temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance and test current for JANTX1N4963CUS/TR?
JANTX1N4963CUS/TR has a nominal Zener voltage of 16.0 V with ±2% tolerance, verified at a test current (IZT) of 75 mA. This tight tolerance ensures predictable regulation in precision feedback networks, and the specified test current reflects the optimal operating point for stable voltage output and minimal dynamic impedance (3.5 Ω).
Does JANTX1N4963CUS/TR require external heatsinking in 5 W operation?
JANTX1N4963CUS/TR dissipates up to 5 W at an end-cap temperature (TEC) of 140 °C, with a junction-to-end-cap thermal resistance of 7 °C/W. Effective heatsinking is achieved by soldering both end caps to adequately sized copper pads - no additional heatsink is required if PCB copper area meets Microsemi's recommended pad layout for the "E" (D-5B) package.
Is JANTX1N4963CUS/TR radiation-hardened, and what is the certified TID level?
Yes, JANTX1N4963CUS/TR is inherently radiation-hardened per Microsemi MicroNote 050, with total ionizing dose (TID) tolerance exceeding 100 krad(Si). This certification applies directly to the JANTX1N4963CUS/TR variant and supports use in low-Earth orbit (LEO) and geosynchronous (GEO) satellite subsystems without derating.
What is the maximum reverse leakage current for JANTX1N4963CUS/TR, and at what voltage is it measured?
JANTX1N4963CUS/TR specifies a maximum reverse leakage current (IR) of 5 μA, measured at a reverse voltage (VR) of 12.2 V and 25 °C. This low leakage ensures minimal error in high-impedance reference circuits and preserves accuracy in battery-powered or low-quiescent-current applications.
How does the temperature coefficient of JANTX1N4963CUS/TR affect its regulation stability?
JANTX1N4963CUS/TR has a temperature coefficient (αVZ) of +0.08%/°C at IZT, indicating a predictable positive drift in Zener voltage with rising temperature. This value enables accurate compensation in temperature-sensitive references and confirms stable behavior across its full −65 °C to +175 °C operating range without inversion or discontinuity.
JANTX1N4963CUS/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:
- ±2%
- 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
JANTX1N4963CUS/TR FAQ
1.How can I place an order for JANTX1N4963CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4963CUS/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 JANTX1N4963CUS/TR reliable?
The price and inventory of JANTX1N4963CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4963CUS/TR is usually 5 days.
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Once your JANTX1N4963CUS/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 JANTX1N4963CUS/TR?
For technical support, including JANTX1N4963CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4963CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4963CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4963CUS/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 JANTX1N4963CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4963CUS/TR?
All JANTX1N4963CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4963CUS/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 JANTX1N4963CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4963CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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