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HomeProductsDiscrete Semiconductor ProductsDiodes - Zener - SingleJANTX1N4975CUS/TR
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JANTX1N4975CUS/TR - Microchip Technology

Manufacturer Part Number
JANTX1N4975CUS/TR
Manufacturer
Microchip Technology
Allelco Part Number
98D-JANTX1N4975CUS/TR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
33,052 pcs available, New & Original
Parts Description
VOLTAGE REGULATOR
Package
E-MELF
Data sheet
-
RoHs Status
 
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In stock: 33052
  • Unit Price: $24.75
  • Subtotal: $0.00

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The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

JANTX1N4975CUS/TR Tech Specifications
Microchip Technology - JANTX1N4975CUS/TR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - JANTX1N4975CUS/TR

Product Attribute Attribute Value
Manufacturer Microchip Technology
Voltage - Zener (Nom) (Vz) 51 V
Voltage - Forward (Vf) (Max) @ If 1.5 V @ 1 A
Tolerance ±2%
Supplier Device Package E-MELF
Series MIL-PRF-19500/356
Power - Max 5 W
Product Attribute Attribute Value
Package / Case SQ-MELF, E
Package Tape & Reel (TR)
Operating Temperature -65°C ~ 175°C (TJ)
Mounting Type Surface Mount
Impedance (Max) (Zzt) 27 Ohms
Current - Reverse Leakage @ Vr 2 µA @ 38.8 V

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
ECCN EAR99

Frequently Asked Questions(FAQ)

What are the key electrical characteristics of the JANTX1N4975CUS/TR Zener diode that influence its use in high-reliability power regulation applications?
The JANTX1N4975CUS/TR exhibits a nominal Zener voltage of 51 V with ±2% tolerance, ensuring precise voltage clamping in regulated supply designs. Its maximum power dissipation is rated at 5 W, which supports robust energy handling under transient conditions. The dynamic impedance (Zzt) of 27 ohms contributes to effective voltage stabilization across load variations, while the reverse leakage current remains exceptionally low at 2 µA at 38.8 V, minimizing standby losses. These parameters collectively make it suitable for stable reference or protection circuits in military and aerospace systems where performance consistency is critical.
How does the operating temperature range of the JANTX1N4975CUS/TR compare with commercial-grade alternatives, and what implications does this have for mission-critical environments?
With an operating junction temperature range of -65°C to +175°C, the JANTX1N4975CUS/TR far exceeds typical commercial components limited to -40°C to +125°C. This extended capability ensures reliable operation in extreme thermal environments such as downhole instrumentation, avionics, or satellite subsystems. The wide margin allows designers to maintain functionality without derating in harsh conditions, reducing the need for thermal mitigation strategies and enhancing system resilience in long-duration missions.
In what design scenarios would the JANTX1N4975CUS/TR be preferred over a standard industrial Zener diode like the 1N4742A?
The JANTX1N4975CUS/TR is favored over devices like the 1N4742A—which typically offers 12 V zener voltage and lower power ratings—in applications requiring higher breakdown precision and ruggedness. For example, in a 50 V telemetry line regulator, the 51 V zener provides a tighter safety margin against voltage surges. Additionally, the MIL-PRF-19500/356 qualification ensures failure rates compliant with space-level reliability standards, making it ideal for defense or satellite power conditioning where component traceability and lifecycle control are mandated.
Can the JANTX1N4975CUS/TR be used in series with other Zener diodes to achieve composite voltage references, and what considerations apply?
Yes, multiple JANTX1N4975CUS/TR diodes can be connected in series to create higher reference voltages, provided total power dissipation stays within limits. For instance, two units in series yield approximately 102 V under matched conditions. However, slight mismatches in Vz due to manufacturing tolerances may cause uneven current sharing, leading to premature aging or failure. Designers should implement current balancing resistors or use laser-trimmed versions if tight regulation below 2% is required across temperature extremes.
What packaging and mounting constraints should engineers consider when integrating the JANTX1N4975CUS/TR into automated assembly lines?
The JANTX1N4975CUS/TR uses the E-MELF package, compatible with standard surface-mount pick-and-place equipment using tape-and-reel (TR) packaging. Its square MELF geometry allows precise placement despite the absence of traditional leads. Engineers must ensure solder paste volume accounts for the flat profile to avoid insufficient wetting, especially during reflow profiling. Thermal pads on PCBs should also accommodate the device’s small footprint to manage heat dissipation effectively in high-duty-cycle applications.
How does the reverse leakage current specification of the JANTX1N4975CUS/TR impact its suitability in precision analog front-ends?
At 38.8 V reverse bias, the leakage current is only 2 µA, which is significantly lower than many commercial Zeners that may exhibit tens of microamps. In high-impedance sensor interfaces or battery-powered measurement systems, this low leakage reduces off-state power drain and minimizes offset errors caused by parasitic conduction paths. This characteristic enhances accuracy in precision voltage monitoring circuits, particularly when cascaded with sensitive amplifiers where input bias currents dominate error budgets.
What role does the ±2% zener voltage tolerance play in system-level calibration and redundancy strategies?
The tight ±2% tolerance simplifies calibration routines by reducing the number of discrete reference values needed in a product line. For example, in a multi-channel data acquisition unit, using multiple JANTX1N4975CUS/TR diodes eliminates per-unit trimming steps. In redundant power architectures, consistent Vz across units ensures balanced current distribution among parallel regulators, preventing localized overloads and improving overall fault tolerance in mission-critical deployments.
Are there any known limitations regarding surge handling or transient response when using the JANTX1N4975CUS/TR in unprotected input stages?
While the JANTX1N4975CUS/TR can absorb brief energy pulses up to 5 W, it lacks integrated avalanche protection circuitry found in transient voltage suppressor (TVS) diodes. Therefore, in unprotected inputs subject to inductive kickback or lightning-induced transients, additional external protection—such as series fuses or RC snubbers—is necessary. The device responds quickly to voltage spikes due to its low Zzt, but sustained overloads beyond 5 W will cause junction degradation or catastrophic failure regardless of short duration.
How does the military qualification (MIL-PRF-19500/356) affect procurement logistics and supply chain risk assessment for the JANTX1N4975CUS/TR?
Military qualification implies adherence to stringent screening, testing, and documentation protocols, which typically restrict sourcing to authorized distributors and manufacturers. Lead times may exceed 16 weeks, and obsolescence risk is mitigated through government-backed inventory programs. However, pricing is generally 2–3× higher than commercial equivalents due to extended quality assurance cycles. Design teams must factor these constraints into program schedules and budget planning, especially for legacy system upgrades requiring form-fit-function replacements.
What trade-offs exist between using the JANTX1N4975CUS/TR versus an integrated linear regulator for 51 V reference applications?
While integrated regulators offer better efficiency and built-in protection features, they often lack the standalone flexibility and high-voltage capability of discrete Zeners like the JANTX1N4975CUS/TR. A dedicated 51 V Zener allows simpler implementation in high-side switching topologies or isolated supplies without requiring feedback loops. However, discrete solutions consume more board space, generate excess heat at higher currents, and introduce noise from poor layout practices. The choice hinges on whether system simplicity or integration density dominates design priorities.
Is the JANTX1N4975CUS/TR suitable for use in automotive ECU voltage supervision circuits despite lacking AEC-Q101 certification?
No, because the JANTX1N4975CUS/TR is not AEC-Q101 qualified, it cannot be reliably used in production automotive applications where component robustness under thermal cycling, vibration, and humidity is mandatory. Although its military-grade reliability might suggest suitability, automotive OEMs require explicit automotive qualification to cover full operational life profiles. Using unqualified parts risks non-compliance with ISO 26262 functional safety standards and voids warranty coverage in mass-market vehicles.
How should thermal management be approached when paralleling multiple JANTX1N4975CUS/TR diodes for increased current capacity?
Paralleling JANTX1N4975CUS/TR diodes increases current handling but demands careful attention to thermal coupling and current sharing. Without individual ballast resistors, manufacturing variances in Vz lead to unequal current distribution, causing one device to overheat prematurely. Mounting diodes on shared copper planes improves thermal balance, but minimum spacing of 1 mm is advised to prevent localized hot spots. Total power dissipation must still respect 5 W per device, and junction-to-case thermal resistance should guide heatsinking decisions based on ambient conditions.
What impact does the EAR99 classification of the JANTX1N4975CUS/TR have on export controls and international deployment of associated hardware?
Classified under EAR99, the JANTX1N4975CUS/TR is not subject to strict U.S. export restrictions, facilitating global distribution. This simplifies supply chain operations for non-sensitive commercial or defense applications. However, end-use verification remains essential, as certain countries impose their own export controls regardless of U.S. classification. Documentation such as end-user statements and technical specifications should accompany shipments to avoid compliance issues during customs clearance.
Why might a designer choose a surface-mount JANTX1N4975CUS/TR over a through-hole equivalent despite similar electrical specs?
Surface-mount packaging enables higher component density, faster automated assembly, and reduced parasitic inductance in high-frequency switching nodes. The E-MELF package integrates seamlessly into modern PCB layouts with minimal routing complexity. Through-hole variants, while mechanically robust, require extra drilling and soldering time, increasing labor costs and defect rates. For batch production of compact military radios or radar modules, the benefits of SMT outweigh marginal mechanical advantages of thru-hole mounting.
How does the absence of a defined series identifier affect compatibility with existing schematics and BOMs referencing earlier JAN-class diodes?
The lack of a series designation means the JANTX1N4975CUS/TR belongs directly to the MIL-PRF-19500/356 lineage rather than a named family like 1N497x. This simplifies cross-referencing with legacy military drawings but requires verification of exact part numbers during revision updates. Designers must confirm all parameters match prior versions—especially zener voltage drift over time—to avoid accidental substitution with functionally similar but non-equivalent devices.
In what ways does the forward voltage drop of the JANTX1N4975CUS/TR influence bidirectional clamping circuit design?
The maximum forward voltage (Vf) of 1.5 V at 1 A indicates moderate conduction loss during positive-going transients. When used in bidirectional TV-like configurations, this Vf limits how close the clamping threshold can approach zero volts, potentially affecting low-voltage signal integrity. Careful selection of series resistors or complementary P/N pairs helps mitigate asymmetry, ensuring symmetrical response around ground in sensitive analog I/O protection networks.
What considerations apply to storage and handling of the JANTX1N4975CUS/TR in cleanroom environments for aerospace fabrication?
As a military-grade component, the JANTX1N4975CUS/TR must be stored in anti-static, dry environments to prevent electrostatic discharge (ESD) damage and moisture absorption. Tape-and-reel packaging should remain sealed until use, and operators must wear grounded wrist straps during unpacking. Cleanroom protocols often mandate humidity-controlled cabinets (30–50% RH) to preserve metallurgical stability, especially given the device’s high-temperature operating limit and susceptibility to whisker formation in lead-free finishes.
How does the HTSUS code 8541.10.0050 inform customs valuation and import duties for the JANTX1N4975CUS/TR in North American markets?
Under Harmonized Tariff Schedule US code 8541.10.0050, the JANTX1N4975CUS/TR falls under “Diodes, semiconductor devices,” specifically excluding light-emitting types. This classification typically results in moderate tariff rates (often under 2.5%) compared to optical or specialized semiconductors. Accurate HS coding avoids customs delays and ensures compliance with NAFTA/USMCA rules of origin, particularly important when sourcing from foreign manufacturers claiming duty-free status under preferential trade agreements.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology JANTX1N4975CUS/TR

Product Attribute JANTX1N4975DUS/TR JANTX1N4975US/TR JANTX1N4974US/TR JANTX1N4974DUS/TR
Part Number JANTX1N4975DUS/TR JANTX1N4975US/TR JANTX1N4974US/TR JANTX1N4974DUS/TR
Manufacturer Microchip Technology Microchip Technology Microchip Technology Microchip Technology
Tolerance - - - -
Power - Max - - - -
Current - Reverse Leakage @ Vr - - - -
Voltage - Zener (Nom) (Vz) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Forward (Vf) (Max) @ If - - - -
Impedance (Max) (Zzt) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount

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Customer Reviews

Evaluation: 10 Articles

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

  • Kevi***.
    Mar 17, 2026

    Fast switching and stable output. Very satisfied with this IC

  • Daou***hekebkeb
    Jun 16, 2024

    I had a great experience purchasing items from Allelcoelec, I recommend

  • Uri ***al
    Jun 19, 2024

    Good comunication,
    Transpnt regarding the process and price.

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    Jun 19, 2024

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
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All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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JANTX1N4975CUS/TR Image

JANTX1N4975CUS/TR

Microchip Technology
98D-JANTX1N4975CUS/TR

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