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Microchip Technology 1N4105-1/TR
- Part No.:
- 1N4105-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4105-1/TR.pdf
- Description:
- DIODE ZENER 11V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,587
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Product details
Overview
1N4105-1/TR from Microsemi is a 500 mW, 11.0 V Zener diode in DO-35 glass package, qualified to JANTX level per MIL-PRF-19500/435, with 5% voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and 0.05 µA maximum reverse leakage at 8.5 V. It serves as a precision voltage reference in military-grade power regulation circuits.
For engineers reviewing the 1N4105-1/TR datasheet, 1N4105-1/TR pinout, 1N4105-1/TR application, or 1N4105-1/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, noise density, junction temperature range, and RoHS-compliant packaging options for high-reliability analog design validation.
Technical Context
This device operates in reverse breakdown mode with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgically bonded construction ensures stable Zener voltage across -65 °C to +175 °C junction temperature range and supports low-noise performance (≤1 µV/√Hz below 6.8 V).
The 1N4105-1/TR exhibits a +0.080 %/°C temperature coefficient and is rated for 40 mA maximum Zener current at 25 °C ambient, with linear power derating to zero at 175 °C. Its 200 Ω dynamic impedance at IZT = 250 mA reflects tight regulation under moderate load variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.0 V at 250 mA test current - defines nominal regulation point for stable reference generation |
| Power Dissipation | 500 mW at 25 °C lead temperature - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - indicates voltage stability under small-signal current perturbations |
| Reverse Leakage IR | 0.05 µA at 8.5 V - confirms minimal off-state conduction for low-power bias networks |
| Junction Temp Range | -65 °C to +175 °C - enables operation in extended industrial and aerospace environments |
| Temp Coefficient αVZ | +0.080 %/°C - quantifies voltage drift with temperature for accuracy-critical references |
| Noise Density | ≤1 µV/√Hz - supports low-noise analog signal conditioning and precision ADC reference circuits |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by single black band; leads are tin-lead or RoHS-compliant matte-tin plated; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lowest potential point in regulation loop |
| Cathode (banded end) | Regulated output node | Held at stable 11.0 V above anode when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and resistance to thermal cycling fatigue in harsh environments |
| MIL-PRF-19500/435 qualification | Validated reliability for JAN/JANTX-level applications including defense avionics and space-qualified subsystems |
| Low noise density | ≤1 µV/√Hz enables use in high-resolution data acquisition front-ends without added filtering |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over decades of operation in humid or corrosive atmospheres |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board layout |
Applications
| Avionics Power Reference | Industrial Sensor Excitation |
|---|---|
Use Scenario: Providing stable 11.0 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Zener voltage reference diode regulating supply rail for precision ADC biasing. Use Value: Maintains ±0.5% output stability over -55 °C to +125 °C operating range, meeting DO-160E environmental requirements. | Use Scenario: Biasing resistive bridge sensors in oil & gas pressure transmitters. IC Role / Device Role / Timing Role: Fixed-voltage excitation source for Wheatstone bridge networks. Use Value: Delivers <0.05 µA leakage current to minimize bridge offset error and improve measurement resolution. |
| Military Radio RF Stage Bias | Spacecraft Telemetry Regulator |
Use Scenario: Setting gate bias voltage for GaAs FET amplifiers in secure HF/VHF transceivers. IC Role / Device Role / Timing Role: Low-noise Zener regulator supplying stable DC bias to RF amplifier stages. Use Value: ≤1 µV/√Hz noise density prevents AM sideband degradation in narrowband voice channels. | Use Scenario: Generating on-board reference voltages for radiation-hardened telemetry interface ICs. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference supporting command decoder and telemetry encoder ICs. Use Value: Inherent radiation hardness per MicroNote 050 allows uninterrupted operation in total ionizing dose >100 krad(Si). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4105US-1 | Same electrical specs but in DO-213AA surface-mount package | Requires PCB rework for SMT assembly; no axial-lead mounting flexibility | Select when automated pick-and-place and board space reduction are priorities over through-hole serviceability |
| 1N4740A | 10 V nominal Zener, 1 W rating, ±5% tolerance, TO-92 package, non-mil-qualified | Lacks MIL-PRF-19500/435 qualification and extended temperature range | Acceptable only for commercial-grade instrumentation where JANTX reliability and -65 °C operation are not required |
Compared with 1N4105US-1 and 1N4740A, the 1N4105-1/TR uniquely combines mil-qualified reliability, axial-leaded mechanical robustness, and sub-µV/√Hz noise performance-making it irreplaceable in safety-critical analog reference paths where traceability and long-term parametric stability are mandated.
Availability
1N4105-1/TR is available at Aetrix Electronics and suitable for avionics power reference, industrial sensor excitation, and military radio RF stage bias requiring stable component supply across extended temperature ranges and high-reliability qualification levels.
Supply support for 1N4105-1/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4105-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems demanding radiation tolerance, hermetic sealing, and extended temperature operation.
FAQ
What is the Zener voltage tolerance for 1N4105-1/TR?
The 1N4105-1/TR has a nominal Zener voltage of 11.0 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under thermal equilibrium conditions at 25 °C ambient temperature with 250 mA test current.
Is 1N4105-1/TR RoHS compliant?
Yes, the 1N4105-1/TR is RoHS compliant, indicated by the "e3" suffix in its full nomenclature (e.g., 1N4105-1e3/TR). RoHS compliance applies only to commercial-grade versions; mil-spec variants (JAN/JANTX/JANTXV/JANS) retain leaded terminations per MIL-STD-750.
What is the maximum reverse leakage current for 1N4105-1/TR?
The maximum reverse leakage current for 1N4105-1/TR is 0.05 µA at VR = 8.5 V, as specified in the Electrical Characteristics table on page 3 of the official Microsemi datasheet T4-LDS-0245-2. This value is measured at 25 °C and reflects the diode's ability to maintain high impedance in the off state.
Does 1N4105-1/TR require heatsinking in typical applications?
No, the 1N4105-1/TR does not require external heatsinking in typical applications due to its 500 mW power rating and low thermal resistance (RθJL = 250 °C/W at 10 mm lead length). Its DO-35 package relies on lead conduction for heat dissipation, and full-rated power is achievable only when leads are kept near ambient temperature.
How is polarity marked on 1N4105-1/TR?
Polarity on the 1N4105-1/TR is marked by a single black band on the glass body, indicating the cathode terminal. The diode must be reverse-biased-with the banded (cathode) end held positive relative to the unbanded (anode) end-for proper Zener regulation, as stated in the Mechanical and Packaging section of the datasheet.
1N4105-1/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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 8.5 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)
1N4105-1/TR FAQ
1.How can I place an order for 1N4105-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4105-1/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 1N4105-1/TR reliable?
The price and inventory of 1N4105-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4105-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4105-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4105-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4105-1/TR?
1N4105-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4105-1/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 1N4105-1/TR?
For technical support, including 1N4105-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4105-1/TR requirements.
6.How does Aetrix verify that 1N4105-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4105-1/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 1N4105-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4105-1/TR?
All 1N4105-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4105-1/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 1N4105-1/TR part is unused and in its original packaging.
Return procedure for 1N4105-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4105-1/TR Tags
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