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

Microchip Technology 1N4100-1/TR

Name: 1N4100-1/TR
Brand: Microchip Technology
SKU: 1N4100-1/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4100-1/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: 1N4100-1/TR.pdf

Description:: DIODE ZENER 7.5V 500MW DO204AH

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Product details

Overview

1N4100-1/TR from Microsemi is a 500 mW, 7.5 V Zener diode in DO-35 glass axial package, qualified to JANTX level per MIL-PRF-19500/435, with 5% voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and max noise density of 1 µV/√Hz - used for precision voltage reference and regulation in military power supplies.

For engineers reviewing the 1N4100-1/TR datasheet, 1N4100-1/TR pinout, 1N4100-1/TR application, or 1N4100-1/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, mil-spec qualification level, RoHS compliance status (e3 suffix), and DO-35 mechanical dimensions - all confirmed from Microsemi T4-LDS-0245-2 Rev. 1.

Technical Context

This Zener diode operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgically bonded junction ensures stable voltage regulation across -65 °C to +175 °C junction temperature range and low noise performance critical for analog reference circuits.

Thermal resistance is 250 °C/W junction-to-lead (at 10 mm lead length) and 300 °C/W junction-to-ambient on FR4 board; power dissipation linearly derates from 500 mW at 25 °C ambient to zero at 175 °C, per Figure 2 of the datasheet.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	7.5 V ±5% at 250 mA - defines nominal regulation point with predictable deviation under production tolerance.
Power Dissipation	500 mW at 25 °C lead temperature - sets maximum steady-state thermal load before derating applies.
Dynamic Impedance Z_ZT	200 Ω at I_ZT = 250 mA - determines output voltage variation under load current changes.
Noise Density	1 µV/√Hz - enables low-noise voltage references in precision analog signal chains.
Temp Coefficient α_VZ	+0.065 %/°C - indicates positive drift with temperature, critical for thermal stability analysis.
Reverse Leakage I_R	1.0 µA at V_R = 5.7 V - defines minimum off-state current in non-regulating bias conditions.
Junction Temp Range	-65 °C to +175 °C - supports operation in extended industrial and aerospace environments.

Pinout & Package

Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package, 0.056–0.090 inch body diameter, 0.140–0.200 inch body length, 1.0–1.5 inch lead length. Cathode indicated by band; banded end is positive during Zener operation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Non-banded end	Connected to circuit ground or lower potential node when regulating; carries full Zener current in reverse bias.
Cathode	Banded end	Connected to regulated voltage rail; must be held at higher potential than anode to maintain breakdown conduction.

Key Features

Feature	Design Value
Metallurgical bond construction	Ensures long-term parameter stability and reduced parameter drift under thermal cycling and high-reliability stress.
MIL-PRF-19500/435 qualification	Validated reliability for JANTX-level applications including avionics, defense electronics, and space-qualified subsystems.
Low noise density	1 µV/√Hz enables use in high-resolution ADC references and low-noise op-amp bias networks without added filtering.
Hermetic glass seal	Prevents moisture ingress and parameter shift over time, supporting >20-year field life in harsh environments.
ESD immunity	Non-sensitive to ESD per MIL-STD-750 Method 1020 - eliminates need for external protection in handling and assembly.

Applications

Avionics Power Reference	Military Radar Bias Supply
Use Scenario: Stable 7.5 V reference for analog-to-digital converter front-end in airborne navigation systems operating across -55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for precision data acquisition subsystems. Use Value: JANTX qualification and -65 °C to +175 °C junction rating ensure uninterrupted regulation during extreme thermal transients.	Use Scenario: Regulation of local bias rails for GaAs MMIC amplifiers in ground-based radar transmitters exposed to vibration and humidity. IC Role / Device Role / Timing Role: Voltage clamp and reference element in high-stability RF amplifier bias networks. Use Value: Hermetic DO-35 package prevents parameter shift due to moisture absorption, maintaining gain stability over 15+ year service life.
Satellite Payload Sensor Interface	Tactical Radio Voltage Monitor
Use Scenario: Low-noise reference for radiation-hardened temperature sensor signal conditioning in LEO satellite payloads. IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric sensor excitation and measurement. Use Value: Inherent radiation hardness (MicroNote 050) and 1 µV/√Hz noise enable accurate telemetry without shielding overhead.	Use Scenario: Overvoltage detection threshold in battery-powered manpack radios operating in desert and maritime environments. IC Role / Device Role / Timing Role: Zener-based comparator input reference for supply voltage monitoring circuitry. Use Value: 5% tolerance and +0.065 %/°C tempco allow predictable trip-point calibration across operational temperature range.

Avionics Power Reference

Military Radar Bias Supply

Use Scenario: Stable 7.5 V reference for analog-to-digital converter front-end in airborne navigation systems operating across -55 °C to +125 °C ambient.

IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for precision data acquisition subsystems.

Use Value: JANTX qualification and -65 °C to +175 °C junction rating ensure uninterrupted regulation during extreme thermal transients.

Use Scenario: Regulation of local bias rails for GaAs MMIC amplifiers in ground-based radar transmitters exposed to vibration and humidity.

IC Role / Device Role / Timing Role: Voltage clamp and reference element in high-stability RF amplifier bias networks.

Use Value: Hermetic DO-35 package prevents parameter shift due to moisture absorption, maintaining gain stability over 15+ year service life.

Satellite Payload Sensor Interface

Tactical Radio Voltage Monitor

Use Scenario: Low-noise reference for radiation-hardened temperature sensor signal conditioning in LEO satellite payloads.

IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric sensor excitation and measurement.

Use Value: Inherent radiation hardness (MicroNote 050) and 1 µV/√Hz noise enable accurate telemetry without shielding overhead.

Use Scenario: Overvoltage detection threshold in battery-powered manpack radios operating in desert and maritime environments.

IC Role / Device Role / Timing Role: Zener-based comparator input reference for supply voltage monitoring circuitry.

Use Value: 5% tolerance and +0.065 %/°C tempco allow predictable trip-point calibration across operational temperature range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4100US-1	Same electrical specs but in DO-213AA surface-mount package - no axial leads, 2.5 mm x 1.3 mm footprint.	Used where PCB real estate is constrained and reflow assembly required; lacks axial mounting flexibility.	Select 1N4100US-1 only when surface-mount assembly and automated placement are mandatory.
1N4100-1e3	Identical DO-35 package and electrical specs, but RoHS-compliant matte-tin plating instead of tin-lead.	Required for commercial-grade designs targeting EU export; not qualified to JANTX level.	Choose 1N4100-1e3 for RoHS compliance in non-mil applications; retain 1N4100-1/TR for JANTX-qualified builds.

Compared with 1N4100US-1 and 1N4100-1e3, the 1N4100-1/TR uniquely combines JANTX-level mil qualification, axial-leaded DO-35 mechanical robustness, and tin-lead solderability - making it the sole choice for legacy-reliable through-hole military power references.

Availability

1N4100-1/TR is available at Aetrix Electronics and suitable for avionics power references, military radar bias supplies, and satellite payload sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 1N4100-1/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 mil-qualified analog and discrete components.

The 1N4100-1/TR belongs to Microsemi's legacy 1N4099–1N4135 Zener family, designed specifically for voltage regulation in defense, aerospace, and industrial systems demanding MIL-PRF-19500 compliance and extended temperature operation.

FAQ

What is the Zener voltage tolerance for 1N4100-1/TR?

The 1N4100-1/TR has a nominal Zener voltage of 7.5 V with a standard tolerance of ±5%, as defined in Microsemi T4-LDS-0245-2 Rev. 1. This tolerance applies at 25 °C with the device in thermal equilibrium and is consistent across all units in the JAN/JANTX-qualified series. The 1N4100-1/TR does not offer tighter 2% or 1% tolerances - those require different part number suffixes (C or D).

Is 1N4100-1/TR RoHS compliant?

The 1N4100-1/TR is not RoHS compliant; it uses traditional tin-lead plating on its axial leads. RoHS-compliant versions carry the "e3" suffix (e.g., 1N4100-1e3) and are available only in commercial grade - they lack JANTX qualification. The 1N4100-1/TR maintains tin-lead for compatibility with legacy military soldering processes and MIL-STD-2000 requirements.

What is the maximum Zener test current for 1N4100-1/TR?

The maximum Zener test current I_ZT for 1N4100-1/TR is 250 mA, as specified in the Electrical Characteristics table on page 3 of Microsemi T4-LDS-0245-2 Rev. 1. This current establishes the operating point for measuring V_Z, Z_ZT, and noise density. Exceeding 250 mA continuously risks exceeding the 500 mW power limit unless ambient temperature is significantly below 25 °C.

Does 1N4100-1/TR have radiation hardness certification?

Yes, the 1N4100-1/TR is inherently radiation hard as documented in Microsemi MicroNote 050. Its metallurgically bonded glass DO-35 structure provides tolerance to total ionizing dose (TID) levels suitable for low-earth orbit (LEO) satellite payloads and certain tactical systems. Radiation test data is not included in the public datasheet but is available under NDA from Microchip Technology.

What is the thermal resistance of 1N4100-1/TR?

The 1N4100-1/TR has a junction-to-lead thermal resistance (R_θJL) of 250 °C/W when measured at 10 mm lead length from the body, and a junction-to-ambient resistance (R_θJA) of 300 °C/W on FR4 board with specified copper pad geometry. These values are critical for calculating safe operating area under sustained power dissipation and appear in the Maximum Ratings table on page 1 of the datasheet.

1N4100-1/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):: 7.5 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 200 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 5.7 V

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

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

1N4100-1/TR FAQ

1.How can I place an order for 1N4100-1/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4100-1/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 1N4100-1/TR reliable?

The price and inventory of 1N4100-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4100-1/TR is usually 5 days.

3.What payment methods are accepted for 1N4100-1/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4100-1/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4100-1/TR?

1N4100-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4100-1/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 1N4100-1/TR?

For technical support, including 1N4100-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4100-1/TR requirements.

6.How does Aetrix verify that 1N4100-1/TR is sourced from the original manufacturer or authorized distributors?

All 1N4100-1/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 1N4100-1/TR meets industry standards.

7.What is the process for return or replacement of 1N4100-1/TR?

All 1N4100-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4100-1/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 1N4100-1/TR part is unused and in its original packaging.

Return procedure for 1N4100-1/TR:

1.Submit a request within 90 days.

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

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