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Microchip Technology 1N4105
- Part No.:
- 1N4105
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
1N4105.pdf
- Description:
- DIODE ZENER
- Quantity:
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Product details
Overview
1N4105-1 from Microsemi is a 500 mW, 11.0 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANTX level per MIL-PRF-19500/435. It delivers stable voltage regulation at 250 mA test current with 200 Ω dynamic impedance and +0.080 %/°C temperature coefficient, used in precision reference and power supply feedback circuits.
For engineers reviewing the 1N4105-1 datasheet, 1N4105-1 pinout, 1N4105-1 application, or 1N4105-1 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W junction-to-lead), noise density (1 µV/√Hz), maximum reverse leakage (0.05 µA @ 9.1 V), and military-grade reliability qualification.
Technical Context
This device operates as a two-terminal voltage reference in reverse breakdown mode, with cathode band indicating polarity. Its metallurgical bond construction ensures low noise and high reliability under thermal cycling and radiation exposure, supporting operation from –65 °C to +175 °C.
The 1N4105-1 exhibits a positive temperature coefficient (+0.080 %/°C), enabling predictable drift compensation in multi-Zener networks. Its 200 Ω dynamic impedance at 250 mA and minimal capacitance (<2 pF typical) support stable regulation across varying load currents without oscillation in feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.0 V ±5% at 250 mA - defines nominal regulation point with tight tolerance for reference accuracy |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous DC power before thermal derating begins at 50 °C |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - determines output voltage variation under load transients (ΔV = Iload × ZZT) |
| Reverse Leakage IR | 0.05 µA at 9.1 V - ensures negligible current draw in standby, critical for low-power bias networks |
| Noise Density | 1 µV/√Hz - enables use in low-noise analog references where broadband voltage stability is required |
| Temp Coefficient αVZ | +0.080 %/°C - quantifies voltage drift over temperature, allowing accurate system-level error budgeting |
| Junction Temp Range | –65 °C to +175 °C - supports deployment in aerospace, downhole, and military environments |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by single black band; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit common or ground; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; supplies regulated 11.0 V when reverse-biased above breakdown; must be held >11.0 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock, ensuring long-term parameter stability in harsh environments |
| MIL-PRF-19500/435 qualification (JANTX) | Validated screening and testing for high-reliability applications including avionics and space-qualified subsystems |
| Low noise density (1 µV/√Hz) | Enables use in precision analog signal chains where reference noise directly impacts ADC/DAC SNR |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over time, critical for 20+ year field deployments |
| Non-ESD-sensitive design | Withstands handling per MIL-STD-750 Method 1020 without parameter degradation-no special ESD controls needed |
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: Two-terminal Zener voltage reference supplying excitation and scaling voltage to precision ADC front-ends. Use Value: JANTX qualification and –65 °C to +175 °C operation ensure uninterrupted reference integrity during rapid cabin pressure and temperature changes. | Use Scenario: Biasing bridge-based strain gauges in oilfield downhole pressure transducers. IC Role / Device Role / Timing Role: Primary voltage regulator establishing excitation potential for Wheatstone bridge sensors. Use Value: Hermetic DO-35 package and metallurgical bond prevent parameter drift under sustained 150 °C wellbore temperatures and vibration. |
| Laser Diode Current Control | Military Radio RF Stage Bias |
Use Scenario: Setting reference voltage for constant-current drivers in fiber-optic transmitter modules. IC Role / Device Role / Timing Role: Zener-based reference in op-amp feedback loop controlling laser diode forward current. Use Value: 200 Ω dynamic impedance and 1 µV/√Hz noise ensure sub-mA current stability and low optical power ripple. | Use Scenario: Generating stable bias voltages for GaAs FET amplifiers in tactical HF/VHF radios. IC Role / Device Role / Timing Role: Voltage reference in discrete transistor bias network for RF power amplifier stages. Use Value: Radiation hardness and MIL-spec qualification guarantee operation in nuclear-electromagnetic pulse (EMP) environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V ±5%, 1 W rating, DO-41 package, +0.075 %/°C TC, 17 Ω ZZT | Higher power, lower impedance, but commercial-only qualification and no MIL-spec screening | Select for cost-sensitive industrial designs where 1 W headroom and lower impedance outweigh reliability requirements |
| 1N5232B | 5.6 V ±5%, 500 mW, DO-35, +0.03 %/°C TC, 17 Ω ZZT, 1 µA IR | Different voltage grade; tighter TC but higher leakage and no military qualification | Choose only if 5.6 V reference is acceptable and ultra-low TC dominates over leakage and reliability needs |
Compared with 1N4105-1, the 1N4740A offers higher power and lower impedance but lacks military qualification and uses a larger DO-41 package; the 1N5232B provides superior temperature stability at 5.6 V but cannot replace 1N4105-1 in 11 V systems due to voltage mismatch and unqualified reliability.
Availability
1N4105-1 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 long product lifecycles.
Supply support for 1N4105-1 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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4105-1 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered for voltage reference stability under extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance and test condition for the 1N4105-1?
The 1N4105-1 has a nominal Zener voltage of 11.0 V with ±5% tolerance, measured at 250 mA Zener test current (IZT) and 25 °C ambient temperature. This tolerance reflects the standard JEDEC specification for the 1N4099–1N4135 series and applies to all reliability levels including JANTX.
Is the 1N4105-1 suitable for high-reliability aerospace applications?
Yes, the 1N4105-1 is qualified to JANTX level per MIL-PRF-19500/435, with full screening including burn-in, temperature cycling, and hermeticity testing. Its metallurgically bonded DO-35 construction and –65 °C to +175 °C operating range make it appropriate for flight-critical avionics power references and satellite subsystems.
What is the maximum reverse leakage current for the 1N4105-1, and at what voltage is it specified?
The 1N4105-1 has a maximum reverse leakage current (IR) of 0.05 µA, specified at a reverse voltage (VR) of 9.1 V - 82% of its nominal Zener voltage. This ultra-low leakage supports high-impedance bias networks and minimizes quiescent power loss in battery-powered systems.
Does the 1N4105-1 have radiation hardness, and is it documented?
Yes, the 1N4105-1 is inherently radiation-hardened as described in Microsemi MicroNote 050. Its glass-encapsulated, metallurgically bonded structure provides tolerance to total ionizing dose (TID) and displacement damage, making it suitable for space and nuclear environments without additional shielding.
Can the 1N4105-1 be used in surface-mount designs?
No - the standard 1N4105-1 is axial-leaded DO-35. However, Microsemi offers surface-mount equivalents: the 1N4105UR-1 in DO-213AA and 1PMT4105 in DO-216 packages. These share identical electrical specs but require different PCB footprints and reflow profiles.
1N4105 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1N4105 FAQ
1.How can I place an order for 1N4105 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4105 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 reliable?
The price and inventory of 1N4105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4105 is usually 5 days.
3.What payment methods are accepted for 1N4105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4105?
1N4105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4105 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?
For technical support, including 1N4105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4105 requirements.
6.How does Aetrix verify that 1N4105 is sourced from the original manufacturer or authorized distributors?
All 1N4105 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 meets industry standards.
7.What is the process for return or replacement of 1N4105?
All 1N4105 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4105, 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 part is unused and in its original packaging.
Return procedure for 1N4105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4105 Tags
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