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Microchip Technology 1N4108-1/TR
- Part No.:
- 1N4108-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4108-1/TR.pdf
- Description:
- DIODE ZENER 14V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,923
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Product details
Overview
1N4108-1/TR from Microsemi is a 500 mW, 14.0 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 +0.085 %/°C temperature coefficient - used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N4108-1/TR datasheet, 1N4108-1/TR pinout, 1N4108-1/TR application, or 1N4108-1/TR equivalent, key selection criteria include Zener voltage stability over temperature, low noise density (≤1 µV/√Hz below 6.8 V), hermetic glass packaging for high-reliability environments, and compatibility with manual or wave-soldered axial-lead PCB assembly.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable 14.0 V regulation across 10.7–40 mA current range with minimal thermal drift. Its metallurgically bonded junction ensures low leakage (IR ≤ 0.05 µA at VR = 11.2 V) and radiation hardness per MicroNote 050.
The DO-35 package provides hermetic sealing and thermal resistance of 250 °C/W (junction-to-lead, 10 mm lead length), enabling operation from –65 °C to +175 °C. Noise density is specified at 1 µV/√Hz, supporting low-noise analog references in instrumentation and avionics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 14.0 V ±5% at IZT = 250 mA - defines nominal regulation point with predictable deviation under load |
| Power Dissipation | 500 mW at TC = 25 °C - supports continuous regulation in compact through-hole layouts with linear derating above 50 °C |
| Dynamic Impedance ZZT | 200 Ω at IZT = 250 mA - limits output voltage variation under changing load current |
| Temp Coefficient αVZ | +0.085 %/°C - enables accurate compensation in wide-temperature military systems |
| Reverse Leakage IR | ≤0.05 µA at VR = 11.2 V - ensures minimal standby current in battery-backed reference circuits |
| Noise Density ND | 1 µV/√Hz - critical for low-noise analog front-ends in test equipment and sensor signal conditioning |
| Junction Temp Range | –65 °C to +175 °C - validated for aerospace, downhole, and high-temp industrial deployment |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package: hermetically sealed, cathode indicated by single black band; leads are tin-lead or RoHS-compliant matte tin; 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 | Connected to lower-potential side in Zener mode; must be negative relative to cathode for regulation |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential side; carries regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTX-level screening ensures reliability for defense electronics with traceable lot control and extended life testing |
| Metallurgical bond construction | Eliminates interfacial voids, improving thermal stability and long-term parameter consistency vs. epoxy-bonded alternatives |
| Low noise density | 1 µV/√Hz enables use in precision analog references where voltage ripple directly impacts measurement accuracy |
| Hermetic glass encapsulation | Prevents moisture ingress and parametric shift in humid or corrosive environments, unlike plastic-packaged Zeners |
| Radiation hardness | Inherent TID tolerance per MicroNote 050 supports operation in space-qualified and nuclear instrumentation systems |
Applications
| Avionics Power Reference | Military Radio Bias Supply |
|---|---|
Use Scenario: Stable 14 V reference for ADC voltage scaling and op-amp biasing in airborne navigation computers. IC Role / Device Role / Timing Role: Zener regulator providing primary voltage reference for analog signal chains. Use Value: Maintains ±0.7 V regulation over –55 °C to +125 °C ambient, meeting DO-160E environmental compliance. | Use Scenario: Local bias rail generation for RF power amplifier stages in handheld tactical radios. IC Role / Device Role / Timing Role: Voltage clamp and regulation element in discrete DC-DC converter feedback networks. Use Value: Delivers <0.05 µA leakage at 11.2 V reverse bias, minimizing quiescent current drain in battery-operated units. |
| Downhole Sensor Excitation | Industrial PLC Analog Input |
Use Scenario: Excitation source for strain-gauge bridges in oilfield logging tools operating at 175 °C. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference for ratiometric bridge measurements. Use Value: Sustains 14.0 V regulation with +0.085 %/°C drift, enabling <0.5% full-scale error over full temperature range. | Use Scenario: Precision shunt reference for 4–20 mA loop-powered transmitters in factory automation. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing loop compliance voltage threshold. Use Value: 200 Ω dynamic impedance ensures <140 mV output variation across 4–20 mA load swing, meeting IEC 61000-4-4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W rating, DO-41 package, ±5% tolerance, 22 Ω ZT - higher power but lower voltage and different thermal profile | Designed for commercial-grade consumer power supplies; lacks MIL qualification and radiation hardness | Select when cost-sensitive commercial designs require higher power and lower ZT, not for high-reliability or extreme environment use |
| CMHZ5241B | 14 V nominal, 500 mW, SOD-123 surface-mount package, ±5%, 200 Ω ZT - same electrical specs but different form factor and qualification level | RoHS-compliant commercial part; no MIL-PRF-19500 screening; unsuitable for JANTX-requiring programs | Choose for space-constrained PCBs where axial mounting is impractical and military qualification is not required |
Compared with 1N4108-1/TR, 1N4742A offers higher power but sacrifices temperature stability and reliability assurance, while CMHZ5241B matches voltage and ZT but omits hermetic sealing and radiation tolerance - making 1N4108-1/TR uniquely suited for mission-critical analog references.
Availability
1N4108-1/TR is available at Aetrix Electronics and suitable for avionics power references, military radio bias supplies, and downhole sensor excitation requiring stable component supply with full traceability and long-term continuity.
Supply support for 1N4108-1/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) specialized in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4099–1N4135 series was designed specifically for precision voltage regulation in mil-spec power systems where hermeticity, radiation tolerance, and thermal stability are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N4108-1/TR?
The 1N4108-1/TR has a nominal Zener voltage of 14.0 V with ±5% tolerance, measured at IZT = 250 mA and TJ = 25 °C. This tolerance reflects the standard JEDEC specification for the 1N4099–1N4135 family and applies to all commercial and screened versions unless otherwise marked with C (±2%) or D (±1%) suffixes.
Is 1N4108-1/TR suitable for high-temperature operation?
Yes, 1N4108-1/TR is rated for junction temperatures from –65 °C to +175 °C and features a thermal resistance of 250 °C/W (junction-to-lead, 10 mm lead length). Its metallurgically bonded DO-35 glass package maintains parameter stability under sustained high-temperature stress, validated per MIL-PRF-19500/435 JANTX requirements.
Does 1N4108-1/TR have radiation hardness certification?
Yes, 1N4108-1/TR exhibits inherent radiation hardness as documented in Microsemi MicroNote 050. While not individually certified to specific TID levels, its construction and process yield performance consistent with MIL-PRF-19500/435 JANS-level devices, making it suitable for low-dose-rate space and nuclear instrumentation applications.
What is the maximum reverse leakage current for 1N4108-1/TR?
The maximum reverse leakage current (IR) for 1N4108-1/TR is 0.05 µA at VR = 11.2 V and TJ = 25 °C. This ultra-low leakage supports energy-efficient biasing in battery-powered military radios and ensures minimal error contribution in high-impedance reference circuits.
How does the noise density of 1N4108-1/TR compare to lower-voltage Zeners in the same family?
1N4108-1/TR exhibits 1 µV/√Hz noise density at IZT = 250 mA, consistent with the sub-6.8 V members of the 1N4099–1N4135 family. This is significantly lower than higher-voltage variants (e.g., 1N4135-1 at 40 µV/√Hz), making it preferred for low-noise analog references where voltage stability and spectral purity are critical.
1N4108-1/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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.7 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)
1N4108-1/TR FAQ
1.How can I place an order for 1N4108-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4108-1/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 1N4108-1/TR reliable?
The price and inventory of 1N4108-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4108-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4108-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4108-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4108-1/TR?
1N4108-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4108-1/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 1N4108-1/TR?
For technical support, including 1N4108-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4108-1/TR requirements.
6.How does Aetrix verify that 1N4108-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4108-1/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 1N4108-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4108-1/TR?
All 1N4108-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4108-1/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 1N4108-1/TR part is unused and in its original packaging.
Return procedure for 1N4108-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4108-1/TR Tags
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