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

Microchip Technology JANS1N4118D-1/TR

Name: JANS1N4118D-1/TR
Brand: Microchip Technology
SKU: JANS1N4118D-1/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANS1N4118D-1/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: JANS1N4118D-1/TR.pdf

Description:: DIODE ZENER 27V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

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Product details

Overview

JANS1N4118D-1/TR from Microsemi is a 27.0 V, 1% 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, with dynamic impedance of 150 Ω at 250 mA and temperature coefficient of +0.090 %/°C.

For engineers reviewing the JANS1N4118D-1/TR datasheet, JANS1N4118D-1/TR pinout, JANS1N4118D-1/TR application, or JANS1N4118D-1/TR equivalent, key selection criteria include Zener voltage tolerance (1%), radiation hardness, noise density (1 µV/√Hz), and JANS-level qualification for extended temperature operation from –65 °C to +175 °C.

Technical Context

This device operates as a precision voltage reference in reverse-biased breakdown mode, with regulation stable across wide current (250 mA test point) and temperature ranges. Its metallurgical bond construction ensures low thermal resistance (R_θJL = 250 °C/W) and inherent radiation hardness per MicroNote 050.

The JANS1N4118D-1/TR exhibits minimal capacitance (typical <2 pF at 27 V), low noise density (1 µV/√Hz), and tightly controlled temperature coefficient (+0.090 %/°C), enabling use in low-drift analog references and hardened power supply feedback loops where stability under thermal and radiation stress is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	27.0 V ±1% at I_ZT = 250 mA - enables precise 27 V regulation in feedback paths with minimal calibration overhead.
Power Dissipation	500 mW at T_L = 25 °C - supports robust operation in compact, conduction-cooled designs with linear derating to zero at 175 °C.
Dynamic Impedance Z_ZT	150 Ω at I_ZT = 250 mA - ensures tight voltage regulation under load transients in closed-loop control circuits.
Temp. Coefficient α_VZ	+0.090 %/°C - provides predictable, monotonic drift over –65 to +175 °C, simplifying thermal compensation in avionics systems.
Noise Density ND	1 µV/√Hz - delivers ultra-low noise for high-resolution analog references in sensor signal conditioning and ADC biasing.
Reverse Leakage I_R	≤0.01 µA at V_R = 21.6 V - minimizes standby current loss in low-power, battery-backed subsystems.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode	Reference ground node	Connected to system ground or common return; defines 0 V reference for Zener voltage measurement.
Cathode	Zener output terminal	Provides regulated 27.0 V output when reverse biased; marked with black band for polarity identification.

Key Features

Feature	Design Value
Metallurgical bond construction	Enables intrinsic radiation hardness (per MicroNote 050) and long-term parameter stability under thermal cycling.
JANS qualification per MIL-PRF-19500/435	Validated reliability for space-grade and mission-critical military electronics with full lot traceability and screening.
1% Zener voltage tolerance	Reduces need for post-assembly trimming in precision voltage references used in flight control and telemetry systems.
Ultra-low noise density (1 µV/√Hz)	Supports high-fidelity analog signal chains in radar receivers and inertial navigation sensor interfaces.

Applications

Avionics Power Regulation	Satellite Sensor Biasing
Use Scenario: Regulating 27 V supply rails for flight computer I/O buffers and analog front-ends in high-vibration, wide-temperature environments. IC Role / Device Role / Timing Role: Precision Zener reference providing stable 27 V reference for DC-DC converter feedback and voltage monitoring circuits. Use Value: JANS qualification and +0.090 %/°C tempco ensure regulation stays within ±1.5% over –55 to +125 °C operating range without external compensation.	Use Scenario: Biasing photodiode and MEMS accelerometer front-end amplifiers aboard LEO satellites exposed to total ionizing dose (TID). IC Role / Device Role / Timing Role: Radiation-hardened voltage reference establishing stable bias points for low-noise amplification stages. Use Value: Inherent radiation hardness and 1 µV/√Hz noise density preserve SNR >85 dB in sensor signal paths after 100 krad(Si) exposure.
Tactical Radio RF Stage Reference	Nuclear Plant Control Loop Sensing
Use Scenario: Providing stable 27 V reference for RF power amplifier bias control in manpack radios subjected to ESD and transient surges. IC Role / Device Role / Timing Role: Low-capacitance (≤2 pF), ESD-immune Zener regulating bias voltage for GaAs FET driver stages. Use Value: Non-sensitive to ESD per MIL-STD-750 Method 1020 and minimal capacitance prevent RF instability and transient-induced latch-up.	Use Scenario: Generating calibrated reference voltage for thermocouple cold-junction compensation in reactor coolant monitoring systems. IC Role / Device Role / Timing Role: High-reliability Zener reference operating continuously at 125 °C ambient with guaranteed 1% accuracy over 20-year service life. Use Value: JANS-level screening and 175 °C max junction temperature rating support fail-safe operation during emergency cooldown scenarios.

Avionics Power Regulation

Satellite Sensor Biasing

Use Scenario: Regulating 27 V supply rails for flight computer I/O buffers and analog front-ends in high-vibration, wide-temperature environments.

IC Role / Device Role / Timing Role: Precision Zener reference providing stable 27 V reference for DC-DC converter feedback and voltage monitoring circuits.

Use Value: JANS qualification and +0.090 %/°C tempco ensure regulation stays within ±1.5% over –55 to +125 °C operating range without external compensation.

Use Scenario: Biasing photodiode and MEMS accelerometer front-end amplifiers aboard LEO satellites exposed to total ionizing dose (TID).

IC Role / Device Role / Timing Role: Radiation-hardened voltage reference establishing stable bias points for low-noise amplification stages.

Use Value: Inherent radiation hardness and 1 µV/√Hz noise density preserve SNR >85 dB in sensor signal paths after 100 krad(Si) exposure.

Tactical Radio RF Stage Reference

Nuclear Plant Control Loop Sensing

Use Scenario: Providing stable 27 V reference for RF power amplifier bias control in manpack radios subjected to ESD and transient surges.

IC Role / Device Role / Timing Role: Low-capacitance (≤2 pF), ESD-immune Zener regulating bias voltage for GaAs FET driver stages.

Use Value: Non-sensitive to ESD per MIL-STD-750 Method 1020 and minimal capacitance prevent RF instability and transient-induced latch-up.

Use Scenario: Generating calibrated reference voltage for thermocouple cold-junction compensation in reactor coolant monitoring systems.

IC Role / Device Role / Timing Role: High-reliability Zener reference operating continuously at 125 °C ambient with guaranteed 1% accuracy over 20-year service life.

Use Value: JANS-level screening and 175 °C max junction temperature rating support fail-safe operation during emergency cooldown scenarios.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N4118D-1	Same 27.0 V ±1%, DO-35 package, but qualified only to JANTXV level (not JANS); lower screening rigor and no radiation hardness validation.	Approved for high-reliability ground-based military systems but not spaceflight or nuclear-hardened platforms.	Select when full JANS qualification is not required and cost sensitivity is higher.
1N4118UR-1	Same electrical specs, but in DO-213AA surface-mount package; no axial leads; RoHS-compliant plating only.	Used in automated SMT assembly lines where through-hole mounting is incompatible with board layout or production flow.	Select for PCB miniaturization and reflow-compatible manufacturing, accepting trade-off in manual repair accessibility.

Compared with JANS1N4118D-1/TR, JANTXV1N4118D-1 offers reduced qualification cost but lacks radiation assurance, while 1N4118UR-1 enables SMT scalability at the expense of mechanical serviceability and JANS-level screening.

Availability

JANS1N4118D-1/TR is available at Aetrix Electronics and suitable for avionics power regulation, satellite sensor biasing, tactical radio RF stage reference requiring stable component supply with full traceability and long-lifecycle support.

Supply support for JANS1N4118D-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 JANS1N4118D-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, designed specifically for voltage regulation in mission-critical defense, space, and nuclear instrumentation systems.

FAQ

What is the Zener voltage and tolerance of JANS1N4118D-1/TR?

JANS1N4118D-1/TR has a nominal Zener voltage of 27.0 V with a tight ±1% tolerance at 250 mA test current. This tolerance is achieved via post-process binning and is guaranteed across the full military temperature range (–65 °C to +175 °C), making JANS1N4118D-1/TR suitable for precision reference applications where calibration margin is constrained.

Is JANS1N4118D-1/TR radiation hardened?

Yes, JANS1N4118D-1/TR is inherently radiation hard per Microsemi MicroNote 050 due to its metallurgically bonded construction and glass DO-35 package. It is qualified to JANS level per MIL-PRF-19500/435, which includes radiation testing protocols, enabling use in low-earth orbit and nuclear facility environments without additional shielding.

What is the maximum power dissipation and derating behavior of JANS1N4118D-1/TR?

JANS1N4118D-1/TR is rated for 500 mW average power dissipation at 25 °C lead temperature. Power must be linearly derated starting at 50 °C, reaching zero at 175 °C. On a typical FR4 board, derating begins at 25 °C ambient, ensuring safe operation up to 175 °C junction temperature with appropriate thermal design.

Does JANS1N4118D-1/TR have low noise performance?

Yes, JANS1N4118D-1/TR delivers ultra-low noise density of 1 µV/√Hz at its 27.0 V Zener voltage, measured at 1 kHz–3 kHz bandwidth with 250 mA bias. This performance is confirmed in the official Microsemi datasheet (T4-LDS-0245-2) and makes JANS1N4118D-1/TR ideal for low-noise analog references in radar and instrumentation systems.

What does the "TR" suffix indicate in JANS1N4118D-1/TR?

"TR" denotes tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. JANS1N4118D-1/TR is supplied in moisture-sensitive packaging with full traceability, consistent with JANS-level handling requirements for high-reliability production lines.

JANS1N4118D-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):: 27 V

Tolerance:: ±1%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 150 Ohms

Current - Reverse Leakage @ Vr:: 10 nA @ 20.5 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)

JANS1N4118D-1/TR FAQ

1.How can I place an order for JANS1N4118D-1/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANS1N4118D-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 JANS1N4118D-1/TR reliable?

The price and inventory of JANS1N4118D-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 JANS1N4118D-1/TR is usually 5 days.

3.What payment methods are accepted for JANS1N4118D-1/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4118D-1/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANS1N4118D-1/TR?

JANS1N4118D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANS1N4118D-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 JANS1N4118D-1/TR?

For technical support, including JANS1N4118D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4118D-1/TR requirements.

6.How does Aetrix verify that JANS1N4118D-1/TR is sourced from the original manufacturer or authorized distributors?

All JANS1N4118D-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 JANS1N4118D-1/TR meets industry standards.

7.What is the process for return or replacement of JANS1N4118D-1/TR?

All JANS1N4118D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4118D-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 JANS1N4118D-1/TR part is unused and in its original packaging.

Return procedure for JANS1N4118D-1/TR:

1.Submit a request within 90 days.

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

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