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Microchip Technology 1N4105-1
- Part No.:
- 1N4105-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4105-1.pdf
- Description:
- DIODE ZENER 11V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,527
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Product details
Overview
1N4105-1 from Microsemi is a 500 mW, 11.0 V axial-leaded Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTX level per MIL-PRF-19500/435. It delivers ±5% Zener voltage tolerance, 250 mA test current, 200 Ω dynamic impedance, and +0.080 %/°C temperature coefficient for precision voltage regulation in high-reliability analog circuits.
For engineers reviewing the 1N4105-1 datasheet, 1N4105-1 pinout, 1N4105-1 application, or 1N4105-1 equivalent, this page provides verified electrical parameters, military-grade qualification status, thermal derating behavior, noise density at 11 V, and direct alternatives with documented Zener voltage and tolerance alignment.
Technical Context
The 1N4105-1 operates as a two-terminal voltage reference device, biased in reverse breakdown to maintain stable 11.0 V across its terminals over wide current (5.7–40 mA operating range) and temperature (−65 °C to +175 °C) conditions. Its metallurgically bonded construction ensures low leakage and radiation hardness per MicroNote 050.
It exhibits 0.05 µA maximum reverse current at 9.1 V, 200 Ω Zener impedance at 250 mA test current, and 1 µV/√Hz typical noise density - consistent with the 6.8 V+ family trend where noise falls rapidly below 6.8 V. Capacitance is minimized per Figure 3, supporting high-frequency stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.0 V at 250 mA - defines precise regulation point for feedback loops and reference rails. |
| Zener Tolerance | ±5% - standard JEDEC tolerance enabling cost-effective selection without tighter-bin sorting. |
| Power Dissipation | 500 mW @ 25 °C - supports robust operation in ambient temperatures up to 50 °C before linear derating begins. |
| Dynamic Impedance ZZT | 200 Ω - determines output voltage variation under load transients; lower than 1N4104-1 (200 Ω) and higher than 1N4106-1 (200 Ω). |
| Temp Coefficient αVZ | +0.080 %/°C - positive drift enables predictable compensation in temperature-varying bias networks. |
| Reverse Current IR | 0.05 µA @ 9.1 V - ultra-low leakage preserves accuracy in high-impedance sensing and reference divider applications. |
| Noise Density ND | 1 µV/√Hz - measured at IZT, critical for low-noise analog references and precision ADC front-ends. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-glass package with tin-lead or RoHS-compliant matte-tin plating. Cathode indicated by single black band; banded end must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; forms return path for Zener current during regulation. |
| Cathode | Regulated output node | Banded terminal supplies stable 11.0 V when reverse-biased; connects to load or error amplifier input. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 Qualified (JANTX) | Validated reliability for aerospace, defense, and industrial control systems requiring extended lifetime and failure-rate assurance. |
| Metallurgical Bond Construction | Eliminates interfacial voids and delamination risk, improving thermal cycling endurance and long-term parameter stability. |
| Low Noise Density (1 µV/√Hz) | Enables use in precision instrumentation amplifiers and high-resolution data acquisition without external filtering. |
| Hermetic Glass Encapsulation | Prevents moisture ingress and parametric shift over time, meeting stringent humidity resistance requirements (MIL-STD-883). |
| ESD Immunity (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without degradation - suitable for handling in non-ESD-controlled production environments. |
Applications
| Industrial Power Supply Reference | Aerospace Sensor Biasing |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter error amplifiers operating from −40 °C to +125 °C. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing 11.0 V setpoint for TL431 or optocoupler-based regulation loop. Use Value: Maintains ±0.5% output voltage accuracy over full temperature range due to +0.080 %/°C coefficient and low 0.05 µA leakage. | Use Scenario: Supplying bias current to piezoresistive pressure transducers in flight control modules. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable excitation voltage for Wheatstone bridge sensors. Use Value: Radiation-hardened structure and JANTX qualification ensure uninterrupted operation in high-altitude avionics environments. |
| Test Equipment Calibration Standard | Medical Imaging Signal Conditioning |
Use Scenario: Serving as traceable voltage standard in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Primary shunt reference in 4½-digit DMM reference subsystem, replacing battery-based standards. Use Value: 1 µV/√Hz noise density and <200 Ω impedance enable sub-10 ppm measurement repeatability without post-regulation filtering. | Use Scenario: Regulating bias for photodiode preamplifiers in CT scanner front-end ASICs. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for transimpedance amplifier reference nodes. Use Value: Hermetic DO-35 package prevents parameter drift during sterilization cycles and long-term clinical deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V nominal, ±5%, 1 W rating, DO-41 package, 17 Ω ZZT, +0.075 %/°C | Higher power and lower impedance but lacks MIL qualification and radiation hardness | Select for commercial bench power supplies where cost and dissipation dominate over reliability certification |
| 1N5232B | 11.0 V nominal, ±5%, 500 mW, DO-35 package, 30 Ω ZZT, +0.085 %/°C, commercial grade only | Same voltage and package but no military qualification or metallurgical bond | Choose for non-critical industrial controls where ESD immunity and hermeticity are secondary to procurement lead time |
Compared with 1N4105-1, the 1N4740A offers higher power and lower impedance but sacrifices military qualification and radiation tolerance; the 1N5232B matches voltage and package but lacks JANTX-level reliability validation and metallurgical bonding integrity.
Availability
1N4105-1 is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace sensor biasing, and test equipment calibration requiring stable component supply across extended temperature and radiation environments.
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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4105-1 belongs to Microsemi's legacy MIL-qualified Zener diode product line, engineered specifically for voltage regulation in mission-critical systems demanding radiation hardness, hermetic sealing, and extended temperature operation.
FAQ
What is the Zener voltage and tolerance of the 1N4105-1?
The 1N4105-1 has a nominal Zener voltage of 11.0 V with a standard ±5% tolerance at 250 mA test current. This value is measured under thermal equilibrium at 25 °C and aligns with JEDEC registration. The 1N4105-1 maintains this specification across its qualified JANTX reliability level and is validated per MIL-PRF-19500/435.
Is the 1N4105-1 suitable for high-reliability aerospace applications?
Yes, the 1N4105-1 is qualified to JANTX level per MIL-PRF-19500/435, making it suitable for aerospace applications requiring proven reliability, radiation hardness (per MicroNote 050), and hermetic glass packaging. Its metallurgical bond construction and −65 °C to +175 °C operating range further support deployment in flight-critical subsystems.
What is the maximum reverse leakage current for the 1N4105-1?
The 1N4105-1 specifies a maximum reverse current (IR) of 0.05 µA at 9.1 V. This ultra-low leakage ensures minimal error in high-impedance reference networks and supports stable operation in precision analog circuits where parasitic currents could degrade accuracy.
Does the 1N4105-1 have a specified noise density?
Yes, the 1N4105-1 exhibits a noise density of 1 µV/√Hz at its 250 mA Zener test current. This value follows the family trend where noise drops rapidly below 6.8 V and is confirmed in the Electrical Characteristics table on Page 3 of the T4-LDS-0245-2 datasheet for the 1N4105-1.
What package type does the 1N4105-1 use and how is polarity marked?
The 1N4105-1 uses the DO-35 (DO-204AH) axial-leaded hermetically sealed glass package. Polarity is marked by a single black cathode band; the banded end must be held positive relative to the unmarked anode terminal for proper Zener regulation operation.
1N4105-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N4105-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4105-1 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 reliable?
The price and inventory of 1N4105-1 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 is usually 5 days.
3.What payment methods are accepted for 1N4105-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4105-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4105-1?
1N4105-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4105-1 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?
For technical support, including 1N4105-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4105-1 requirements.
6.How does Aetrix verify that 1N4105-1 is sourced from the original manufacturer or authorized distributors?
All 1N4105-1 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 meets industry standards.
7.What is the process for return or replacement of 1N4105-1?
All 1N4105-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4105-1, 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 part is unused and in its original packaging.
Return procedure for 1N4105-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4105-1 Tags
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