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Microchip Technology 1N4105/TR
- Part No.:
- 1N4105/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4105/TR.pdf
- Description:
- DIODE ZENER 11V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:7,946
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Product details
Overview
1N4105/TR from Microsemi is a 500 mW, 11.0 V ±5% Zener diode in DO-35 glass axial package, qualified to JANTX level per MIL-PRF-19500/435, with 200 Ω dynamic impedance at 250 mA test current and 0.05 µA max reverse leakage at 8.5 V, used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N4105/TR datasheet, 1N4105/TR pinout, 1N4105/TR application, or 1N4105/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, noise density (1 µV/√Hz), RoHS-compliant plating option, and mil-spec qualification status - all critical for high-reliability analog design and obsolescence-sensitive programs.
Technical Context
The 1N4105/TR operates as a two-terminal voltage reference diode, conducting in reverse breakdown with stable 11.0 V regulation across 1–40 mA operating current. Its metallurgically bonded junction ensures low noise (1 µV/√Hz) and radiation hardness per MicroNote 050, supporting operation from –65 °C to +175 °C.
Thermal performance is defined by RθJL = 250 °C/W (3/8″ lead length) and linear power derating from 500 mW at 25 °C to zero at 175 °C. It exhibits +0.080 %/°C temperature coefficient and 200 Ω dynamic impedance at IZT = 250 mA, confirming tight regulation under varying load and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.0 V ±5% at 250 mA - defines precise regulation point for analog references and overvoltage clamping. |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous operation in compact through-hole layouts with controlled lead heatsinking. |
| Dynamic Impedance ZZT | 200 Ω @ 250 mA - ensures minimal output voltage shift under load transients in feedback loops. |
| Reverse Leakage IR | 0.05 µA @ 8.5 V - enables ultra-low standby current in battery-backed monitoring circuits. |
| Noise Density | 1 µV/√Hz - critical for low-noise instrumentation amplifiers and precision ADC reference buffers. |
| Temp. Coefficient αVZ | +0.080 %/°C - allows predictable drift compensation in wide-temperature industrial sensors. |
| Junction Temp. Range | –65 °C to +175 °C - validated for aerospace avionics and downhole oilfield electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial package; cathode indicated by single black band; tin-lead or RoHS-compliant matte-tin plating; weight ≈ 0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; establishes reference return path for regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; delivers stable 11.0 V to load when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTX-level screening confirmed - enables use in defense systems requiring traceable reliability data and lot acceptance testing. |
| Metallurgical bond construction | Eliminates interfacial delamination risk - ensures long-term stability under thermal cycling and mechanical shock. |
| Low noise density | 1 µV/√Hz at 11 V - directly reduces RMS noise in precision voltage references without external filtering. |
| Hermetic glass seal | Prevents moisture ingress and parameter drift - critical for 20+ year field life in sealed military enclosures. |
| RoHS-compliant option | e3 suffix available - satisfies EU compliance requirements while maintaining identical electrical performance. |
Applications
| Aerospace Power Regulation | Test Equipment Reference |
|---|---|
|
Use Scenario: Regulating auxiliary 11 V rail in satellite power management units exposed to radiation and thermal vacuum. IC Role / Device Role / Timing Role: Primary Zener reference for DC-DC converter feedback and voltage monitor comparators. Use Value: Radiation-hardened metallurgical bond and –65 °C to +175 °C operation ensure uninterrupted regulation during orbital thermal cycling. |
Use Scenario: Providing stable 11.0 V reference for calibration circuits in portable multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-cost IC references where ultra-low noise is required. Use Value: 1 µV/√Hz noise density and ±5% tolerance enable sub-0.1% measurement accuracy without trimming. |
| Industrial Sensor Signal Conditioning | Military Radio Bias Supply |
|
Use Scenario: Generating bias voltage for bridge-based pressure transducers in oil & gas downhole tools. IC Role / Device Role / Timing Role: Low-drift Zener source for Wheatstone bridge excitation and op-amp offset nulling. Use Value: +0.080 %/°C tempco and 200 Ω ZZT minimize span error across –40 °C to +150 °C operational range. |
Use Scenario: Clamping and regulating RF amplifier stage bias in manpack tactical radios operating in desert environments. IC Role / Device Role / Timing Role: Overvoltage protection and supply rail stabilization in high-transient EMI environments. Use Value: JANTX qualification and 0.05 µA IR ensure reliable operation during voltage surges and extended storage. |
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, 10% tolerance, 1 W rating, DO-41 package - higher power but looser tolerance and no mil-qualification. | Suitable for commercial-grade power supply feedback; lacks radiation hardness and extended temperature validation. | Select when cost and power >11 V regulation stability are primary; avoid in mil/aero designs requiring JANTX traceability. |
| MMBZ5232B | 5.1 V nominal, SOT-23 surface-mount, 225 mW - incompatible voltage, package, and qualification level. | Used in space-constrained consumer PCBs; not rated for >125 °C or radiation environments. | Only viable if redesigning for 5.1 V and accepting non-mil reliability; not a functional substitute for 1N4105/TR. |
Compared with 1N4105/TR, 1N4740A offers higher power but sacrifices precision and reliability assurance, while MMBZ5232B trades voltage, package, and qualification - making neither a drop-in replacement, but both useful context for cost- or footprint-driven trade studies.
Availability
1N4105/TR is available at Aetrix Electronics and suitable for aerospace power regulation, test equipment reference design, and industrial sensor signal conditioning requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4105/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 analog and mixed-signal components for defense, aerospace, and industrial markets.
The 1N4105/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where radiation tolerance, thermal robustness, and long-term parametric stability are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N4105/TR?
The 1N4105/TR has a nominal Zener voltage of 11.0 V with ±5% tolerance, measured at IZT = 250 mA and TA = 25 °C in still air. This tolerance reflects JEDEC-standard specification for the base commercial version; tighter tolerances (2%, 1%) require alternate part numbers with C/D suffixes.
Is 1N4105/TR RoHS compliant?
Yes - the 1N4105/TR is available in RoHS-compliant form with matte-tin plating (e3 suffix), as documented in Microsemi's T4-LDS-0245-2 datasheet. RoHS compliance applies only to commercial-grade versions; mil-spec variants retain tin-lead plating per MIL-STD-750.
What is the maximum reverse leakage current for 1N4105/TR?
The 1N4105/TR specifies a maximum reverse leakage current (IR) of 0.05 µA at VR = 8.5 V and TA = 25 °C. This ultra-low leakage supports energy-efficient operation in always-on monitoring circuits and extends battery life in portable military devices.
Does 1N4105/TR have radiation hardness certification?
Yes - the 1N4105/TR is inherently radiation hard per Microsemi MicroNote 050, a result of its metallurgically bonded construction and hermetic DO-35 glass package. While not individually tested per MIL-STD-883, its process and structure are validated for TID tolerance in space-qualified systems.
What is the thermal resistance and derating behavior of 1N4105/TR?
The 1N4105/TR has RθJL = 250 °C/W (measured at 3/8″ lead length) and linearly derates from 500 mW at 25 °C to zero at 175 °C. Derating begins at TL = 50 °C on PCBs, requiring thermal management via copper pour or lead heatsinking in high-ambient applications.
1N4105/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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 8.44 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)
1N4105/TR FAQ
1.How can I place an order for 1N4105/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4105/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/TR reliable?
The price and inventory of 1N4105/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/TR is usually 5 days.
3.What payment methods are accepted for 1N4105/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4105/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4105/TR?
1N4105/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4105/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/TR?
For technical support, including 1N4105/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4105/TR requirements.
6.How does Aetrix verify that 1N4105/TR is sourced from the original manufacturer or authorized distributors?
All 1N4105/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/TR meets industry standards.
7.What is the process for return or replacement of 1N4105/TR?
All 1N4105/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4105/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/TR part is unused and in its original packaging.
Return procedure for 1N4105/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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