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HomeProductsDiscrete Semiconductor ProductsDiodes - Zener - SingleJANTX1N3156-1/TR
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JANTX1N3156-1/TR - Microchip Technology

Manufacturer Part Number
JANTX1N3156-1/TR
Manufacturer
Microchip Technology
Allelco Part Number
98D-JANTX1N3156-1/TR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,336 pcs available, New & Original
Parts Description
DIODE ZENER TEMP COMPENSATED
Package
DO-35
Data sheet
-
RoHs Status
 
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In stock: 5336

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Specifications

JANTX1N3156-1/TR Tech Specifications
Microchip Technology - JANTX1N3156-1/TR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - JANTX1N3156-1/TR

Product Attribute Attribute Value
Manufacturer Microchip Technology
Voltage - Zener (Nom) (Vz) 8.8 V
Voltage - Forward (Vf) (Max) @ If 1.5 V @ 2 A
Tolerance ±5%
Supplier Device Package DO-35
Power - Max 500 mW
Product Attribute Attribute Value
Package / Case DO-204AH, DO-35, Axial
Operating Temperature -65°C ~ 175°C
Mounting Type Through Hole
Impedance (Max) (Zzt) 15 Ohms
Current - Reverse Leakage @ Vr 10 µA @ 5.5 V

Frequently Asked Questions(FAQ)

What are the key electrical characteristics of the JANTX1N3156-1/TR that influence its suitability for precision voltage regulation in high-reliability systems?
The JANTX1N3156-1/TR offers a tightly specified Zener voltage of 8.8 V with ±5% tolerance, ensuring stable reference performance under varying operating conditions. Its maximum power dissipation of 500 mW limits the allowable current to approximately 57 mA at nominal voltage, which must be respected in continuous operation. The impedance (Zzt) of 15 Ω indicates relatively low dynamic resistance, contributing to better line and load regulation compared to higher-impedance Zeners. These parameters collectively support use in applications requiring stable reference voltages without significant ripple or drift due to supply fluctuations.
How does the temperature compensation feature of the JANTX1N3156-1/TR benefit system-level thermal management in military-grade electronics?
As a temperature-compensated Zener diode, the JANTX1N3156-1/TR exhibits minimized variation in breakdown voltage across its full operating range of -65°C to 175°C. This characteristic reduces the need for additional thermal stabilization circuitry in harsh environments, such as aerospace or defense systems where component reliability is critical. Engineers can rely on consistent voltage reference behavior without overdesigning thermal solutions, thereby simplifying board layout and reducing part count while maintaining compliance with MIL-PRF-19500/158 qualification standards.
What design constraints should be considered when integrating the JANTX1N3156-1/TR into a through-hole assembly targeting long-term mission-critical operation?
Given its military grade and axial DO-35 packaging, the JANTX1N3156-1/TR is compatible with traditional PCB mounting but requires careful handling during wave soldering to avoid thermal stress beyond 175°C. The maximum reverse leakage current of 10 µA at 5.5 V suggests minimal off-state power consumption, beneficial for battery-powered subsystems. However, designers must ensure series current-limiting resistors limit total current to stay within the 500 mW power budget. Additionally, placement near heat sources may require derating due to junction temperature limits, even though the device operates up to 175°C.
How does the JANTX1N3156-1/TR compare to standard commercial-grade Zener diodes like the 1N3156 in terms of environmental robustness and traceability?
The JANTX1N3156-1/TR differs from standard 1N3156 variants by virtue of its MIL-PRF-19500/158 qualification and extended temperature range (-65°C to 175°C), making it suitable for space-constrained or high-stress environments. Unlike typical consumer-grade diodes, it provides guaranteed performance under extreme thermal cycling and radiation exposure, often required in avionics or satellite applications. While both devices share similar electrical characteristics, only the JANTX variant ensures full lot traceability and screening per military standards, reducing failure risk in deployed systems.
What role does the low Zener impedance (15 Ω) play in minimizing output voltage droop under load transients?
A lower Zener impedance, such as the 15 Ω specified for the JANTX1N3156-1/TR, results in less voltage sag when load currents fluctuate. During transient events—such as sudden increases in downstream demand—the diode’s ability to maintain near-nominal voltage improves because it dissipates energy more efficiently without significant internal resistance drop. This makes the JANTX1N3156-1/TR preferable over higher-Zzt alternatives in precision analog front-ends where transient response directly affects measurement accuracy or control loop stability.
Can the JANTX1N3156-1/TR be used in parallel with other Zener diodes to increase current handling, and what risks might this introduce?
While paralleling Zener diodes like the JANTX1N3156-1/TR might seem logical for higher current applications, it introduces significant risk due to mismatch in Vz between individual units. Even slight variations in breakdown voltage can cause one device to conduct most of the current, leading to uneven heating and premature failure. Furthermore, differences in dynamic impedance and leakage current exacerbate imbalance. For reliable operation above 100 mA, an active regulator is typically more appropriate than passive paralleling, especially in qualified military designs where predictability is essential.
What impact does the ±5% voltage tolerance have on calibration requirements in data acquisition systems using the JANTX1N3156-1/TR?
The ±5% tolerance means the actual Zener voltage could deviate from 8.8 V by up to ±0.44 V, potentially affecting ADC reference levels in measurement circuits. In systems requiring sub-percent accuracy, this deviation necessitates post-calibration trimming or selection of multiple units via binning—both of which add cost and complexity. Designers should either accept reduced resolution or incorporate adjustable feedback networks to nullify initial tolerance effects, particularly when cascading stages that multiply error propagation.
Why might a designer choose the JANTX1N3156-1/TR over a surface-mount equivalent despite increased board space requirements?
Although the JANTX1N3156-1/TR uses an older DO-35 axial package, its military qualification and wide temperature range justify retention in legacy or ruggedized platforms where reliability outweighs miniaturization goals. Surface-mount versions may lack equivalent screening levels or have tighter thermal profiles, increasing failure rates under shock/vibration. For high-assurance systems already leveraging through-hole components for mechanical resilience, the JANTX1N3156-1/TR offers proven interchangeability without sacrificing functional margins.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology JANTX1N3156-1/TR

Product Attribute JANTX1N3156UR-1/TR JANTX1N3157UR-1/TR JANTX1N3154-1/TR JANTX1N3155-1/TR
Part Number JANTX1N3156UR-1/TR JANTX1N3157UR-1/TR JANTX1N3154-1/TR JANTX1N3155-1/TR
Manufacturer Microchip Technology Microchip Technology Microchip Technology Microchip Technology
Voltage - Zener (Nom) (Vz) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Power - Max - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Mounting Type - Surface Mount Through Hole Surface Mount
Current - Reverse Leakage @ Vr - - - -
Tolerance - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Forward (Vf) (Max) @ If - - - -
Impedance (Max) (Zzt) - - - -

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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
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Microchip Technology

JANTX1N3156-1/TR

Microchip Technology
98D-JANTX1N3156-1/TR

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