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

Microchip Technology 1N4119/TR

Name: 1N4119/TR
Brand: Microchip Technology
SKU: 1N4119/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4119/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-204AA, DO-7, Axial

Datasheet:: 1N4119/TR.pdf

Description:: DIODE ZENER 28V 500MW DO7

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N4119/TR from Microsemi is a 500 mW, 28.0 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANTXV level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace power supplies and precision reference circuits.

For engineers reviewing the 1N4119/TR datasheet, 1N4119/TR pinout, 1N4119/TR application, or 1N4119/TR equivalent, this page delivers verified Zener voltage, dynamic impedance, temperature coefficient, noise density, and military qualification status - critical for radiation-hardened, low-noise, and thermally stable analog designs.

Technical Context

This Zener diode operates in reverse breakdown with a nominal V_Z of 28.0 V at I_ZT = 250 mA, exhibiting ZZT = 200 Ω and αV_Z = +0.095 %/°C. Its internal metallurgical bond ensures stable regulation across -65 °C to +175 °C junction temperature range.

Designed for low-noise applications, the 1N4119/TR delivers ND = 1 µV/√Hz at 28 V and maintains IR ≤ 0.01 µA at VR = 21.3 V - enabling use in precision references where leakage and broadband noise must be minimized.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	28.0 V ±5% at I_ZT = 250 mA - sets precise regulation point for feedback loops and reference rails.
Power Dissipation	500 mW at T_L = 25 °C, derated linearly to zero at 175 °C - defines thermal design margin on PCBs with 3/8″ lead length.
Zener Impedance ZZT	200 Ω at 250 mA - determines output impedance stability under load transients in shunt regulator topologies.
Temp. Coefficient αV_Z	+0.095 %/°C - quantifies voltage drift over temperature; enables compensation in wide-range environmental operation.
Noise Density ND	1 µV/√Hz - specifies broadband RMS noise floor critical for low-noise analog references and sensor excitation.
Reverse Leakage IR	≤ 0.01 µA at VR = 21.3 V - ensures minimal current draw in standby or high-impedance bias networks.
Junction Temp. Range	-65 °C to +175 °C - supports operation in extreme environments including space-grade and downhole electronics.

Pinout & Package

DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit common; establishes reference node for regulated output at cathode.
Cathode (banded end)	Zener regulation output / reverse-bias anode	Supplies stabilized 28.0 V when biased positive relative to anode; polarity marking prevents misorientation.

Key Features

Feature	Design Value
MIL-PRF-19500/435 JANTXV qualification	Validated reliability for aerospace and defense systems requiring extended lifetime and radiation tolerance.
Metallurgical bond construction	Eliminates interfacial delamination risk under thermal cycling, ensuring long-term parameter stability.
Low noise density (1 µV/√Hz)	Enables use in ultra-low-noise voltage references without external filtering in precision instrumentation.
Hermetic glass sealing	Prevents moisture ingress and parameter shift in high-humidity or corrosive environments.
Non-ESD-sensitive per MIL-STD-750	Allows handling without special ESD controls during assembly, reducing manufacturing overhead.

Applications

Aerospace Power Regulation	Precision Reference Circuits
Use Scenario: Regulating auxiliary rail in satellite power distribution units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 28.0 V reference for DC-DC converter feedback and telemetry conditioning. Use Value: JANTXV qualification and -65 °C to +175 °C operation ensure uninterrupted regulation across orbital thermal cycles.	Use Scenario: Generating low-drift reference for 24-bit ADC front-ends in test equipment. IC Role / Device Role / Timing Role: Precision voltage reference source with <0.01 µA leakage and 1 µV/√Hz noise floor. Use Value: Low ND and tight αV_Z (+0.095 %/°C) minimize code spread and offset drift over temperature.
High-Reliability Industrial Control	Radiation-Hardened Sensor Interfaces
Use Scenario: Overvoltage clamp and reference in nuclear plant control module I/O protection circuits. IC Role / Device Role / Timing Role: Zener clamp protecting analog inputs while supplying stable bias to isolation amplifiers. Use Value: Hermetic DO-35 package and inherent radiation hardness per MicroNote 050 prevent parametric degradation under neutron flux.	Use Scenario: Biasing radiation-tolerant photodiode arrays in space-based Earth observation payloads. IC Role / Device Role / Timing Role: Low-leakage, low-noise voltage source for photodiode reverse bias and transimpedance amplifier reference. Use Value: IR ≤ 0.01 µA at 21.3 V prevents signal corruption in picoamp-level photocurrent measurements.

Aerospace Power Regulation

Precision Reference Circuits

Use Scenario: Regulating auxiliary rail in satellite power distribution units exposed to thermal vacuum and radiation.

IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 28.0 V reference for DC-DC converter feedback and telemetry conditioning.

Use Value: JANTXV qualification and -65 °C to +175 °C operation ensure uninterrupted regulation across orbital thermal cycles.

Use Scenario: Generating low-drift reference for 24-bit ADC front-ends in test equipment.

IC Role / Device Role / Timing Role: Precision voltage reference source with <0.01 µA leakage and 1 µV/√Hz noise floor.

Use Value: Low ND and tight αV_Z (+0.095 %/°C) minimize code spread and offset drift over temperature.

High-Reliability Industrial Control

Radiation-Hardened Sensor Interfaces

Use Scenario: Overvoltage clamp and reference in nuclear plant control module I/O protection circuits.

IC Role / Device Role / Timing Role: Zener clamp protecting analog inputs while supplying stable bias to isolation amplifiers.

Use Value: Hermetic DO-35 package and inherent radiation hardness per MicroNote 050 prevent parametric degradation under neutron flux.

Use Scenario: Biasing radiation-tolerant photodiode arrays in space-based Earth observation payloads.

IC Role / Device Role / Timing Role: Low-leakage, low-noise voltage source for photodiode reverse bias and transimpedance amplifier reference.

Use Value: IR ≤ 0.01 µA at 21.3 V prevents signal corruption in picoamp-level photocurrent measurements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4119US (DO-213AA surface-mount)	Same electrical specs but DO-213AA SMT package; no axial leads.	Used where board space is constrained and reflow assembly is required.	Select 1N4119US only when automated placement and footprint reduction are mandatory.
1N4119-1 (JANS-qualified variant)	Identical electrical parameters; certified to JANS (highest MIL-PRF-19500 reliability level).	Required for mission-critical spaceflight hardware with full radiation testing traceability.	Choose 1N4119-1 when JANS certification documentation and lot traceability are contractually mandated.

Compared with 1N4119/TR, the 1N4119US offers identical regulation performance in a surface-mount form factor ideal for high-density layouts, while the 1N4119-1 adds full JANS qualification for flight-critical systems - neither is pin-compatible due to differing packages and screening levels.

Availability

1N4119/TR is available at Aetrix Electronics and suitable for aerospace power regulation, precision reference circuits, and high-reliability industrial control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 1N4119/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 analog and mixed-signal components.

The 1N4119/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where parameter stability, low noise, and environmental ruggedness are non-negotiable.

FAQ

What is the Zener voltage tolerance for 1N4119/TR?

The 1N4119/TR has a nominal Zener voltage of 28.0 V with a standard tolerance of ±5%, as defined by JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0245-2 datasheet. This tolerance applies at I_ZT = 250 mA and T_A = 25 °C. The "TR" suffix indicates tape-and-reel packaging but does not affect voltage tolerance.

Is 1N4119/TR qualified to JANTXV level?

Yes, the 1N4119/TR is qualified to JANTXV level per MIL-PRF-19500/435, as explicitly stated in the "Qualified Levels" section on page 1 of the datasheet. This qualification includes rigorous environmental stress screening, burn-in, and parameter verification across temperature extremes - confirming suitability for high-reliability aerospace applications.

What is the maximum Zener current I_ZM for 1N4119/TR?

The maximum Zener current I_ZM for 1N4119/TR is 40 mA, as specified in the Electrical Characteristics table on page 3 of the datasheet. This value corresponds to the current at which the device reaches its rated 500 mW power dissipation at 28.0 V, assuming thermal equilibrium at 25 °C lead temperature.

Does 1N4119/TR have RoHS compliance?

Yes, the 1N4119/TR is RoHS compliant, indicated by the "e3" suffix in its full part number (e.g., 1N4119-1e3/TR). Per the datasheet, RoHS-compliant versions are available for commercial-grade devices only and feature annealed matte-tin plating per MIL-STD-750 method 2026.

What is the thermal resistance junction-to-lead (R_θJL) for 1N4119/TR?

The thermal resistance junction-to-lead (R_θJL) for 1N4119/TR is 250 °C/W, measured with 3/8″ (10 mm) lead length from the body, as listed in the Maximum Ratings table on page 1 of the datasheet. This value guides heatsinking decisions when operating near maximum power dissipation.

1N4119/TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-204AA, DO-7, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 28 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 200 Ohms

Current - Reverse Leakage @ Vr:: 10 nA @ 21.28 V

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

Operating Temperature:: -65°C ~ 175°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-7 (DO-204AA)

1N4119/TR FAQ

1.How can I place an order for 1N4119/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4119/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 1N4119/TR reliable?

The price and inventory of 1N4119/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4119/TR is usually 5 days.

3.What payment methods are accepted for 1N4119/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4119/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4119/TR?

1N4119/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4119/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 1N4119/TR?

For technical support, including 1N4119/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4119/TR requirements.

6.How does Aetrix verify that 1N4119/TR is sourced from the original manufacturer or authorized distributors?

All 1N4119/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 1N4119/TR meets industry standards.

7.What is the process for return or replacement of 1N4119/TR?

All 1N4119/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4119/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 1N4119/TR part is unused and in its original packaging.

Return procedure for 1N4119/TR:

1.Submit a request within 90 days.

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

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