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

Microchip Technology JANTX1N4112C-1

Name: JANTX1N4112C-1
Brand: Microchip Technology
SKU: JANTX1N4112C-1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANTX1N4112C-1

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: JANTX1N4112C-1.pdf

Description:: DIODE ZENER 18V 500MW DO204AH

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Product details

Overview

JANTX1N4112C-1 from Microsemi is a 500 mW, 18.0 V ±2% metallurgically bonded glass Zener diode in DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation in aerospace and defense power supplies, reference circuits, and overvoltage protection.

For engineers reviewing the JANTX1N4112C-1 datasheet, JANTX1N4112C-1 pinout, JANTX1N4112C-1 application, or JANTX1N4112C-1 equivalent, key selection criteria include Zener voltage tolerance (±2%), dynamic impedance (100 Ω at 250 mA), noise density (1 µV/√Hz), temperature coefficient (+0.090 %/°C), and hermetic DO-35 packaging for harsh-environment operation.

Technical Context

This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 18.0 V at 250 mA test current, exhibiting low dynamic impedance (100 Ω) and minimal noise density (1 µV/√Hz) - critical for stable analog references and low-noise biasing. Its metallurgical bond construction ensures mechanical robustness under thermal cycling and vibration.

Qualified to MIL-PRF-19500/435 JANTX level, JANTX1N4112C-1 supports operation across –65 °C to +175 °C junction temperature range and features a +0.090 %/°C temperature coefficient - enabling predictable voltage drift compensation in wide-temperature military systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	18.0 V ±2% at 250 mA - enables precise 18 V rail regulation with tight tolerance for reference-grade applications.
Power Dissipation	500 mW at 25 °C - supports stable operation in compact through-hole designs without forced cooling.
Dynamic Impedance (Z_ZT)	100 Ω at I_ZT = 250 mA - ensures minimal output voltage variation under load transients.
Noise Density	1 µV/√Hz - provides ultra-low noise performance essential for precision instrumentation and ADC reference buffers.
Temperature Coefficient	+0.090 %/°C - allows accurate prediction of voltage drift over –65 °C to +175 °C operating range.
Reverse Leakage (I_R)	≤0.05 µA at 14.4 V - guarantees negligible standby current in high-impedance bias networks.
Junction Temperature Range	–65 °C to +175 °C - meets extended environmental requirements for avionics and space-qualified electronics.

Pinout & Package

Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by band; operated with banded end positive for Zener regulation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current sink during forward conduction; connected to lower-potential node in Zener mode	Provides return path for Zener current; must be tied to ground or common reference in shunt regulator configuration.
Cathode	Regulated output node in reverse-biased Zener operation	Banded terminal - connects to input supply; delivers stable 18.0 V to load when reverse-biased above breakdown.

Key Features

Feature	Design Value
MIL-PRF-19500/435 JANTX qualification	Validated reliability for mission-critical aerospace and defense systems requiring traceable lot control and screening.
Metallurgical bond construction	Eliminates wire-bond failure modes - enhances survivability under shock, vibration, and thermal cycling.
1 µV/√Hz noise density	Enables use in low-noise analog front-ends where reference stability directly impacts measurement accuracy.
Hermetic glass DO-35 package	Prevents moisture ingress and parameter shift over time - critical for long-life embedded systems in humid environments.
±2% Zener voltage tolerance (C suffix)	Reduces need for post-production trimming in precision voltage reference designs, lowering manufacturing cost.

Applications

Aerospace Power Conditioning	Defense System Reference
Use Scenario: Regulating 18 V reference rails in satellite power distribution units exposed to radiation and thermal extremes. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable bias for ADCs, DACs, and op-amps in radiation-hardened subsystems. Use Value: Hermetic DO-35 package and JANTX qualification ensure uninterrupted operation over –65 °C to +175 °C with <0.05 µA leakage at 14.4 V.	Use Scenario: Precision voltage reference in missile guidance inertial measurement unit (IMU) analog signal chains. IC Role / Device Role / Timing Role: Low-noise Zener source for sensor excitation and calibration circuitry requiring sub-µV/√Hz spectral purity. Use Value: 1 µV/√Hz noise density and +0.090 %/°C tempco enable <0.1% total error budget across full military temperature range.
Avionics Overvoltage Protection	Tactical Radio Bias Network
Use Scenario: Clamping transient overvoltages on 28 V aircraft bus interfaces in flight control computers. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy while maintaining regulated clamping at 18 V. Use Value: 500 mW power rating and 100 Ω dynamic impedance limit voltage excursion to ≤18.5 V during 100 ms transients.	Use Scenario: Generating stable local bias voltages for RF power amplifier stages in handheld tactical radios. IC Role / Device Role / Timing Role: Low-drift Zener reference supplying gate bias to GaN FETs in high-efficiency PA modules. Use Value: ±2% tolerance and metallurgical bond construction maintain bias point stability despite repeated thermal cycling during field deployment.

Aerospace Power Conditioning

Defense System Reference

Use Scenario: Regulating 18 V reference rails in satellite power distribution units exposed to radiation and thermal extremes.

IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable bias for ADCs, DACs, and op-amps in radiation-hardened subsystems.

Use Value: Hermetic DO-35 package and JANTX qualification ensure uninterrupted operation over –65 °C to +175 °C with <0.05 µA leakage at 14.4 V.

Use Scenario: Precision voltage reference in missile guidance inertial measurement unit (IMU) analog signal chains.

IC Role / Device Role / Timing Role: Low-noise Zener source for sensor excitation and calibration circuitry requiring sub-µV/√Hz spectral purity.

Use Value: 1 µV/√Hz noise density and +0.090 %/°C tempco enable <0.1% total error budget across full military temperature range.

Avionics Overvoltage Protection

Tactical Radio Bias Network

Use Scenario: Clamping transient overvoltages on 28 V aircraft bus interfaces in flight control computers.

IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy while maintaining regulated clamping at 18 V.

Use Value: 500 mW power rating and 100 Ω dynamic impedance limit voltage excursion to ≤18.5 V during 100 ms transients.

Use Scenario: Generating stable local bias voltages for RF power amplifier stages in handheld tactical radios.

IC Role / Device Role / Timing Role: Low-drift Zener reference supplying gate bias to GaN FETs in high-efficiency PA modules.

Use Value: ±2% tolerance and metallurgical bond construction maintain bias point stability despite repeated thermal cycling during field deployment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N4112C-1	Higher qualification level (JANTXV vs. JANTX); tighter screening, enhanced burn-in, and extended life testing per MIL-PRF-19500/435.	Suitable for Class H (spaceflight) and critical flight-safety systems where zero defect probability is mandated.	Select JANTXV1N4112C-1 only when system-level qualification requires JANTXV-level screening beyond JANTX baseline.
1N4112UR-1	Same electrical specs but in DO-213AA surface-mount package; no axial leads; RoHS-compliant matte-tin plating.	Used in automated SMT production lines where board space is constrained and reflow compatibility is required.	Choose 1N4112UR-1 for new PCB designs targeting high-volume SMT assembly; not drop-in compatible with DO-35 footprint.

Compared with JANTX1N4112C-1, JANTXV1N4112C-1 adds screening rigor without altering electrical behavior, while 1N4112UR-1 replaces axial mounting with surface-mount geometry - both retain identical 18.0 V ±2% regulation but serve distinct mechanical and qualification requirements.

Availability

JANTX1N4112C-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference design, and avionics overvoltage protection requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for JANTX1N4112C-1 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 Corporation (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.

JANTX1N4112C-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for ruggedized voltage regulation in mission-critical electronic systems where parametric stability and environmental resilience are non-negotiable.

FAQ

What is the Zener voltage tolerance of JANTX1N4112C-1?

JANTX1N4112C-1 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This corresponds to a nominal 18.0 V regulation point with a guaranteed range of 17.64 V to 18.36 V at 250 mA test current and 25 °C ambient, meeting stringent requirements for precision reference applications.

Is JANTX1N4112C-1 RoHS compliant?

No, JANTX1N4112C-1 is not RoHS compliant. The "e3" RoHS designation applies only to commercial-grade versions (e.g., 1N4112C-1e3); military-grade variants like JANTX1N4112C-1 use traditional tin-lead plating per MIL-STD-750 and are exempt from RoHS restrictions due to reliability and solderability requirements in high-reliability applications.

What is the maximum reverse leakage current for JANTX1N4112C-1?

The maximum reverse leakage current (I_R) for JANTX1N4112C-1 is 0.05 µA at 14.4 V (80% of nominal V_Z). This ultra-low leakage ensures minimal power loss in high-impedance bias networks and preserves accuracy in precision analog circuits where loading effects must be avoided.

Can JANTX1N4112C-1 be used in surface-mount designs?

No, JANTX1N4112C-1 uses an axial-leaded DO-35 (DO-204AH) glass package and is not suitable for surface-mount assembly. For SMT-compatible equivalents, consider 1N4112UR-1 in DO-213AA package - it shares identical electrical specifications but requires a different PCB footprint and reflow profile.

What is the temperature coefficient of JANTX1N4112C-1?

JANTX1N4112C-1 has a temperature coefficient of +0.090 %/°C, meaning its Zener voltage increases by approximately 0.0162 V per °C rise in junction temperature. This predictable positive drift allows designers to compensate for thermal effects in high-stability reference circuits operating across –65 °C to +175 °C.

JANTX1N4112C-1 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Voltage - Zener (Nom) (Vz):: 18 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 13.7 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: Military

Qualification:: MIL-PRF-19500/435

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AH (DO-35)

JANTX1N4112C-1 FAQ

1.How can I place an order for JANTX1N4112C-1 through Aetrix?

Please submit a Request for Quotation (RFQ) for JANTX1N4112C-1 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 JANTX1N4112C-1 reliable?

The price and inventory of JANTX1N4112C-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4112C-1 is usually 5 days.

3.What payment methods are accepted for JANTX1N4112C-1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4112C-1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANTX1N4112C-1?

JANTX1N4112C-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANTX1N4112C-1 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 JANTX1N4112C-1?

For technical support, including JANTX1N4112C-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4112C-1 requirements.

6.How does Aetrix verify that JANTX1N4112C-1 is sourced from the original manufacturer or authorized distributors?

All JANTX1N4112C-1 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 JANTX1N4112C-1 meets industry standards.

7.What is the process for return or replacement of JANTX1N4112C-1?

All JANTX1N4112C-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4112C-1, 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 JANTX1N4112C-1 part is unused and in its original packaging.

Return procedure for JANTX1N4112C-1:

1.Submit a request within 90 days.

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

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