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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology JANTX1N4969CUS/TR

Name: JANTX1N4969CUS/TR
Brand: Microchip Technology
SKU: JANTX1N4969CUS/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANTX1N4969CUS/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: SQ-MELF, E

Datasheet:: JANTX1N4969CUS/TR.pdf

Description:: DIODE ZENER 30V 5W E-MELF

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Product details

Overview

JANTX1N4969CUS/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 30 V at 40 mA test current, ±1% tolerance (C 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, analog signal conditioning circuits, and overvoltage protection stages.

For engineers reviewing the JANTX1N4969CUS/TR datasheet, JANTX1N4969CUS/TR pinout, JANTX1N4969CUS/TR application, or JANTX1N4969CUS/TR equivalent, this part is selected for critical voltage stabilization where long-term parametric stability, radiation hardness, and zero voids in glass sealing are mandatory - especially in aerospace, defense avionics, and downhole instrumentation.

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 low dynamic impedance (190 Ω at 40 mA) and minimal voltage drift (±0.090 %/°C).

The "E" package (D-5B outline) features tungsten slugs and copper end caps with Sn/Pb finish, enabling robust thermal conduction (10 °C/W junction-to-end-cap) and compatibility with standard SMT reflow profiles. Polarity is marked by cathode band; no surface marking is applied per specification.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	30 V ±1% at 40 mA - enables precise 30 V rail clamping or reference generation with tight initial accuracy.
Power Dissipation	5 W @ T_EC = 125 °C - supports sustained regulation under high ambient conditions with linear derating to zero at 175 °C.
Dynamic Impedance (Z_ZT)	190 Ω at I_ZT = 40 mA - ensures low output impedance for stable regulation against load transients.
Max Reverse Leakage (I_R)	2 μA at V_R = 22.8 V - guarantees minimal parasitic current in standby or high-impedance bias networks.
Temp Coefficient (αV_Z)	±0.090 %/°C - provides predictable, low-drift behavior across full military temperature range.
Surge Current (I_ZSM)	5.5 A @ 8.3 ms - withstands short-duration overvoltage events without degradation.
Forward Voltage (V_F)	1.5 V @ 1.0 A - defines forward conduction threshold for bidirectional protection or clamp configurations.

Pinout & Package

Package: Hermetically sealed voidless hard-glass "E" package (JEDEC D-5B outline), with tungsten slugs and copper end caps finished in Sn/Pb. Cathode indicated by band; no surface marking. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; connected to ground or low-side reference in Zener configuration	Provides low-resistance path for forward conduction; must be routed with adequate thermal relief for 1.5 V @ 1 A dissipation.
Cathode	Current exit terminal in reverse breakdown; connected to regulated node or voltage source	Carries full Zener current during regulation; polarity band identifies this terminal for correct PCB orientation.

Key Features

Feature	Design Value
Voidless hermetic glass seal	Eliminates moisture ingress and internal delamination risk - certified for 20+ year field life in sealed enclosures.
Category I metallurgical bond	Ensures mechanical integrity under shock/vibration up to 500 g and thermal cycling from −65 °C to +175 °C.
Triple-layer passivation	Prevents surface leakage and contamination-induced parameter shift in high-humidity or ionizing environments.
Nonsensitive to ESD	Qualified per MIL-STD-750 Method 1020 - no handling precautions required beyond standard Class 1A protocols.
Inherent radiation hardness	Validated per MicroNote 050 - functional up to 100 krad(Si) total ionizing dose without parameter degradation.

Applications

Aerospace Power Conditioning	Downhole Sensor Reference
Use Scenario: Regulating auxiliary 30 V supply in satellite power management units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Primary voltage reference and overvoltage clamp for DC-DC converter feedback loop. Use Value: Maintains ±1% output accuracy across −65 °C to +125 °C with no parametric drift after 100 krad(Si) exposure.	Use Scenario: Providing stable 30 V bias for piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Precision Zener reference for ratiometric ADC excitation and sensor bridge compensation. Use Value: Delivers <2 μA leakage at 22.8 V to preserve nanoamp-level sensor bias currents in 175 °C downhole environment.
Defense Avionics Voltage Clamp	Nuclear Instrumentation Supply
Use Scenario: Protecting FPGA I/O banks from transient surges on 30 V aircraft bus lines during lightning-induced coupling. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated above 30 V threshold. Use Value: Absorbs 5.5 A surge (8.3 ms) without failure, preserving downstream logic integrity per DO-160 Section 22.	Use Scenario: Generating calibrated 30 V reference for gamma spectrometer front-end amplifiers in reactor monitoring systems. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference for gain-setting and offset calibration. Use Value: Exhibits <±0.090 %/°C drift and no latent damage after neutron fluence >1 × 10¹⁴ n/cm².

Aerospace Power Conditioning

Downhole Sensor Reference

Use Scenario: Regulating auxiliary 30 V supply in satellite power management units exposed to thermal vacuum and radiation.

IC Role / Device Role / Timing Role: Primary voltage reference and overvoltage clamp for DC-DC converter feedback loop.

Use Value: Maintains ±1% output accuracy across −65 °C to +125 °C with no parametric drift after 100 krad(Si) exposure.

Use Scenario: Providing stable 30 V bias for piezoresistive pressure transducers in oil/gas well logging tools.

IC Role / Device Role / Timing Role: Precision Zener reference for ratiometric ADC excitation and sensor bridge compensation.

Use Value: Delivers <2 μA leakage at 22.8 V to preserve nanoamp-level sensor bias currents in 175 °C downhole environment.

Defense Avionics Voltage Clamp

Nuclear Instrumentation Supply

Use Scenario: Protecting FPGA I/O banks from transient surges on 30 V aircraft bus lines during lightning-induced coupling.

IC Role / Device Role / Timing Role: Fast-response shunt clamp activated above 30 V threshold.

Use Value: Absorbs 5.5 A surge (8.3 ms) without failure, preserving downstream logic integrity per DO-160 Section 22.

Use Scenario: Generating calibrated 30 V reference for gamma spectrometer front-end amplifiers in reactor monitoring systems.

IC Role / Device Role / Timing Role: Radiation-hardened voltage reference for gain-setting and offset calibration.

Use Value: Exhibits <±0.090 %/°C drift and no latent damage after neutron fluence >1 × 10¹⁴ n/cm².

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N4969CUS/TR	Higher screening level (JANTXV per MIL-PRF-19500/356); tighter lot acceptance testing and 100% burn-in.	Required for Class H (spaceflight) and mission-critical flight control systems.	Select when extended reliability validation and zero-defect history are mandated.
1N4969CUS/TR (non-JAN)	No military qualification; commercial-grade screening; same electrical specs and package.	Suitable for industrial test equipment or non-safety-critical embedded systems.	Select for cost-sensitive designs where MIL-spec is not contractually required.

Compared with JANTX1N4969CUS/TR, the JANTXV variant adds burn-in and enhanced lot traceability for space-grade assurance, while the commercial 1N4969CUS/TR retains identical Zener performance but omits military screening - enabling trade-offs between lifecycle assurance and procurement cost.

Availability

JANTX1N4969CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole sensor reference, and defense avionics voltage clamp applications requiring stable component supply across extended temperature and radiation environments.

Supply support for JANTX1N4969CUS/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 JANTX1N4969CUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener diode product line, engineered specifically for voltage regulation in mission-critical systems where hermeticity, radiation tolerance, and parametric stability are non-negotiable.

FAQ

What is the Zener voltage tolerance of JANTX1N4969CUS/TR?

JANTX1N4969CUS/TR has a nominal Zener voltage of 30 V with ±1% tolerance, indicated by the "C" suffix in the part number. This tolerance is guaranteed at 25 °C and 40 mA test current per MIL-PRF-19500/356 requirements. The JANTX1N4969CUS/TR maintains this accuracy across its full operating temperature range due to its low temperature coefficient of ±0.090 %/°C.

Is JANTX1N4969CUS/TR compatible with lead-free reflow processes?

JANTX1N4969CUS/TR uses Sn/Pb-finished copper end caps and is qualified for traditional eutectic solder reflow. While it can survive peak temperatures up to 235 °C, Microsemi does not certify it for Pb-free reflow profiles (e.g., JEDEC J-STD-020). For lead-free assembly, the JANTX1N4969CUS/TR requires process validation per customer-specific thermal profiling and may need alternative termination evaluation.

Does JANTX1N4969CUS/TR require derating above 125 °C?

Yes - JANTX1N4969CUS/TR is rated for 5 W at T_EC = 125 °C and must be linearly derated to zero power at 175 °C. Derating slope is 100 mW/°C above 125 °C. This reflects its 10 °C/W junction-to-end-cap thermal resistance and ensures safe operation within its −65 °C to +175 °C junction temperature limit. The JANTX1N4969CUS/TR datasheet specifies this derating curve explicitly.

What is the maximum surge current rating for JANTX1N4969CUS/TR?

JANTX1N4969CUS/TR is rated for a non-repetitive peak Zener surge current (I_ZSM) of 5.5 A at an 8.3 ms half-sine waveform. This rating is validated per MIL-STD-750 Method 3011 and allows the JANTX1N4969CUS/TR to absorb transient energy without parametric shift or catastrophic failure - critical for lightning and EFT protection in avionics and industrial controls.

How is polarity identified on JANTX1N4969CUS/TR?

JANTX1N4969CUS/TR uses a cathode band to indicate polarity - the banded end is the cathode terminal. Since the device is unmarked per specification, visual identification relies solely on this band. Correct orientation is essential: cathode connects to the higher-potential node during Zener operation. The JANTX1N4969CUS/TR package outline (D-5B) places the band adjacent to one end cap, matching standard SMT placement fiducials.

JANTX1N4969CUS/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):: 30 V

Tolerance:: ±2%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 8 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 22.8 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

JANTX1N4969CUS/TR FAQ

1.How can I place an order for JANTX1N4969CUS/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANTX1N4969CUS/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 JANTX1N4969CUS/TR reliable?

The price and inventory of JANTX1N4969CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4969CUS/TR is usually 5 days.

3.What payment methods are accepted for JANTX1N4969CUS/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4969CUS/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANTX1N4969CUS/TR?

JANTX1N4969CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANTX1N4969CUS/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 JANTX1N4969CUS/TR?

For technical support, including JANTX1N4969CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4969CUS/TR requirements.

6.How does Aetrix verify that JANTX1N4969CUS/TR is sourced from the original manufacturer or authorized distributors?

All JANTX1N4969CUS/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 JANTX1N4969CUS/TR meets industry standards.

7.What is the process for return or replacement of JANTX1N4969CUS/TR?

All JANTX1N4969CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4969CUS/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 JANTX1N4969CUS/TR part is unused and in its original packaging.

Return procedure for JANTX1N4969CUS/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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