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

Microchip Technology JANS1N4122C-1/TR

Name: JANS1N4122C-1/TR
Brand: Microchip Technology
SKU: JANS1N4122C-1/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANS1N4122C-1/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: JANS1N4122C-1/TR.pdf

Description:: DIODE ZENER 36V 500MW DO204AH

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Product details

Overview

JANS1N4122C-1/TR from Microsemi is a 36 V, ±2% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers stable voltage regulation with 200 Ω dynamic impedance at 250 mA test current, low noise density (1 µV/√Hz), and operates across –65 °C to +175 °C junction temperature range.

For engineers reviewing the JANS1N4122C-1/TR datasheet, JANS1N4122C-1/TR pinout, JANS1N4122C-1/TR application, or JANS1N4122C-1/TR equivalent, this page provides verified electrical parameters, military qualification status, thermal derating behavior, noise performance, and direct alternatives for radiation-hardened, high-stability reference design.

Technical Context

This device functions as a precision shunt voltage regulator in feedback loops and reference circuits where long-term stability under extreme thermal and radiation environments is required. Its metallurgical bond construction ensures mechanical robustness and low parameter drift, while the hermetically sealed DO-35 glass package maintains integrity under vacuum and high-humidity conditions.

The JANS1N4122C-1/TR exhibits a positive temperature coefficient of +0.095 %/°C, enabling predictable voltage shift over temperature - critical for compensating sensor or amplifier offset drift. Its 250 mA Zener test current and 200 Ω dynamic impedance at IZT support stable regulation under moderate load variations without external buffering.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	36.0 V ±2% at 250 mA - enables precise 36 V reference generation with tight initial tolerance for calibration-critical systems.
Power Dissipation	500 mW @ 25 °C lead temperature - supports continuous operation in compact layouts with linear derating to zero at 175 °C.
Dynamic Impedance Z_ZT	200 Ω @ 250 mA - ensures minimal output voltage variation under changing load currents in regulated power supplies.
Noise Density	1 µV/√Hz - provides ultra-low noise for precision analog references in instrumentation and ADC biasing.
Temp Coefficient α_VZ	+0.095 %/°C - allows predictable, monotonic voltage increase with temperature for compensation-aware designs.
Max Reverse Current I_R	10 µA @ 27.4 V - guarantees low leakage in high-impedance sensing nodes and battery-backed circuits.
Junction Temp Range	–65 °C to +175 °C - validated for operation in space-grade electronics, jet engine controllers, and downhole tools.

Pinout & Package

DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener operation. Hermetically sealed, tin-lead plated leads solderable per MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Reference ground node	Connected to system ground or common return; forms low-impedance path for reverse leakage and regulation current.
Cathode	Zener output terminal	Provides regulated 36 V output when reverse-biased; must be held at higher potential than anode for conduction.

Key Features

Feature	Design Value
MIL-PRF-19500/435 JANS qualification	Validated for Class S (space) and Class H (high reliability) applications with full lot traceability and screening.
Metallurgical bond construction	Eliminates interfacial delamination risk under thermal cycling and mechanical shock - essential for launch vibration survival.
Radiation hardness	Inherently radiation-tolerant per Microsemi MicroNote 050 - no degradation up to 100 krad(Si) total ionizing dose.
Low capacitance	Typical <1.5 pF - preserves high-frequency signal integrity in RF bias networks and fast-switching reference paths.
ESD immunity	Non-sensitive per MIL-STD-750 Method 1020 - withstands >4 kV HBM without parameter shift or failure.

Applications

Avionics Power Reference	Satellite Sensor Biasing
Use Scenario: Providing stable 36 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision data acquisition subsystems. Use Value: ±2% initial tolerance and +0.095 %/°C TC enable calibrated accuracy over –55 °C to +125 °C operational range without software correction.	Use Scenario: Biasing photodiode amplifiers and radiation-hardened op-amps in Earth observation payloads. IC Role / Device Role / Timing Role: Low-noise, radiation-immune voltage reference for analog front-end conditioning circuits. Use Value: 1 µV/√Hz noise density and inherent TID hardness ensure signal fidelity in low-light, high-radiation orbital environments.
Nuclear Instrumentation	Missile Guidance Calibration
Use Scenario: Setting reference thresholds in neutron detector pulse-height analyzers operating inside reactor containment. IC Role / Device Role / Timing Role: High-temperature-stable Zener element in comparator-based threshold detection circuitry. Use Value: Operation up to +175 °C junction temperature and hermetic DO-35 package prevent parameter drift during extended high-temp exposure.	Use Scenario: Calibrating inertial measurement unit (IMU) analog outputs prior to field deployment. IC Role / Device Role / Timing Role: Primary voltage standard in portable calibration equipment used for tactical weapon systems. Use Value: JANS-level qualification and full lot traceability satisfy DoD documentation requirements for mission-critical calibration hardware.

Avionics Power Reference

Satellite Sensor Biasing

Use Scenario: Providing stable 36 V reference for analog-to-digital converters in flight control computers.

IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision data acquisition subsystems.

Use Value: ±2% initial tolerance and +0.095 %/°C TC enable calibrated accuracy over –55 °C to +125 °C operational range without software correction.

Use Scenario: Biasing photodiode amplifiers and radiation-hardened op-amps in Earth observation payloads.

IC Role / Device Role / Timing Role: Low-noise, radiation-immune voltage reference for analog front-end conditioning circuits.

Use Value: 1 µV/√Hz noise density and inherent TID hardness ensure signal fidelity in low-light, high-radiation orbital environments.

Nuclear Instrumentation

Missile Guidance Calibration

Use Scenario: Setting reference thresholds in neutron detector pulse-height analyzers operating inside reactor containment.

IC Role / Device Role / Timing Role: High-temperature-stable Zener element in comparator-based threshold detection circuitry.

Use Value: Operation up to +175 °C junction temperature and hermetic DO-35 package prevent parameter drift during extended high-temp exposure.

Use Scenario: Calibrating inertial measurement unit (IMU) analog outputs prior to field deployment.

IC Role / Device Role / Timing Role: Primary voltage standard in portable calibration equipment used for tactical weapon systems.

Use Value: JANS-level qualification and full lot traceability satisfy DoD documentation requirements for mission-critical calibration hardware.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N4122C-1	Same electrical specs and DO-35 package; qualified to JANTXV (not JANS) per MIL-PRF-19500/435.	Lacks full JANS screening (e.g., burn-in, radiation testing); suitable for high-reliability ground systems but not spaceflight.	Select when cost sensitivity outweighs need for Class S qualification and full radiation assurance.
1N4122C-1/TR	Commercial-grade version; identical Zener voltage, tolerance, and package but no MIL qualification or radiation data.	RoHS-compliant (e3 suffix), lower cost, intended for industrial test equipment and non-mission-critical avionics.	Choose for prototyping or volume production where military screening is unnecessary and RoHS compliance is mandatory.

Compared with JANS1N4122C-1/TR, JANTXV1N4122C-1 offers reduced screening rigor but retains high-temperature capability, while 1N4122C-1/TR sacrifices qualification entirely for cost and environmental compliance - making each appropriate for distinct tiers of reliability requirement.

Availability

JANS1N4122C-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, nuclear instrumentation requiring stable component supply with full traceability, radiation assurance, and extended temperature operation.

Supply support for JANS1N4122C-1/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.

The JANS1N4122C-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered specifically for voltage reference stability in mission-critical defense, space, and nuclear systems.

FAQ

What is the Zener voltage and tolerance of JANS1N4122C-1/TR?

JANS1N4122C-1/TR has a nominal Zener voltage of 36.0 V with a ±2% tolerance at 250 mA test current. This tolerance is achieved via post-process binning and is guaranteed under MIL-PRF-19500/435 JANS screening. The device maintains this specification across its full operating temperature range of –65 °C to +175 °C junction temperature.

Is JANS1N4122C-1/TR radiation hardened?

Yes, JANS1N4122C-1/TR is inherently radiation hard per Microsemi MicroNote 050, with documented survivability up to 100 krad(Si) total ionizing dose. Its metallurgically bonded structure and hermetic DO-35 package contribute to this hardness, and JANS qualification includes radiation lot acceptance testing per MIL-PRF-19500/435.

What is the maximum power dissipation and derating behavior of JANS1N4122C-1/TR?

JANS1N4122C-1/TR is rated for 500 mW average power dissipation at 25 °C lead temperature. Power must be linearly derated starting at 50 °C lead temperature, reaching zero at 175 °C. On a typical FR4 board with 4 mm² copper pads, it derates from 500 mW at 25 °C ambient, reaching zero at 175 °C ambient - consistent with its specified junction temperature limits.

Does JANS1N4122C-1/TR have low noise performance?

Yes, JANS1N4122C-1/TR delivers 1 µV/√Hz noise density at 250 mA Zener test current, measured in the 1 kHz–3 kHz band. This ultra-low noise is confirmed in the official Microsemi datasheet (T4-LDS-0245-2, Rev. 1) and makes JANS1N4122C-1/TR suitable for precision analog references in instrumentation and high-resolution ADC circuits.

What packaging and marking does JANS1N4122C-1/TR use?

JANS1N4122C-1/TR uses the hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plated leads. Cathode is marked by a visible band; polarity requires the banded end to be held positive relative to the anode for Zener operation. "TR" suffix indicates tape-and-reel packaging per EIA-296 standard.

JANS1N4122C-1/TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 36 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 200 Ohms

Current - Reverse Leakage @ Vr:: 10 nA @ 27.4 V

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

Operating Temperature:: -65°C ~ 175°C (TJ)

Grade:: Military

Qualification:: MIL-PRF-19500/435

Mounting Type:: Through Hole

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

JANS1N4122C-1/TR FAQ

1.How can I place an order for JANS1N4122C-1/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANS1N4122C-1/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 JANS1N4122C-1/TR reliable?

The price and inventory of JANS1N4122C-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4122C-1/TR is usually 5 days.

3.What payment methods are accepted for JANS1N4122C-1/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4122C-1/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANS1N4122C-1/TR?

JANS1N4122C-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANS1N4122C-1/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 JANS1N4122C-1/TR?

For technical support, including JANS1N4122C-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4122C-1/TR requirements.

6.How does Aetrix verify that JANS1N4122C-1/TR is sourced from the original manufacturer or authorized distributors?

All JANS1N4122C-1/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 JANS1N4122C-1/TR meets industry standards.

7.What is the process for return or replacement of JANS1N4122C-1/TR?

All JANS1N4122C-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4122C-1/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 JANS1N4122C-1/TR part is unused and in its original packaging.

Return procedure for JANS1N4122C-1/TR:

1.Submit a request within 90 days.

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

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