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Microchip Technology 1N4117-1
- Part No.:
- 1N4117-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4117-1.pdf
- Description:
- DIODE ZENER 25V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,421
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Product details
Overview
1N4117-1 from Microsemi is a 500 mW, 25 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANTXV level per MIL-PRF-19500/435. It delivers stable voltage regulation at 250 mA test current with 150 Ω dynamic impedance and +0.090 %/°C temperature coefficient, used in precision reference and power supply feedback circuits.
For engineers reviewing the 1N4117-1 datasheet, 1N4117-1 pinout, 1N4117-1 application, or 1N4117-1 equivalent, key selection criteria include Zener voltage tolerance, noise density (1 µV/√Hz), thermal resistance (250 °C/W junction-to-lead), and military-grade reliability qualification - all critical for high-stability analog references and aerospace power systems.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 25.0 V at 250 mA, exhibiting low noise density (1 µV/√Hz) and tight thermal stability (+0.090 %/°C). Its metallurgical bond construction ensures robustness under thermal cycling and radiation exposure.
The 1N4117-1 maintains regulation across wide current ranges (IZK to IZM = 40 mA max) and temperatures (–65 °C to +175 °C), with dynamic impedance measured at 150 Ω using 10% rms AC modulation on DC bias - confirming suitability for low-drift feedback loops in regulated DC-DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 25.0 V @ 250 mA - precise reference point for feedback networks requiring stable mid-range voltage regulation |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous operation in compact axial-leaded designs with 3/8″ lead length |
| Dynamic Impedance ZZT | 150 Ω @ 250 mA - ensures minimal output voltage variation under load transients in closed-loop regulators |
| Temp Coefficient αVZ | +0.090 %/°C - enables predictable drift compensation in temperature-critical instrumentation references |
| Noise Density ND | 1 µV/√Hz @ 250 mA - critical for low-noise analog signal chains and precision ADC reference buffers |
| Reverse Leakage IR | 10 nA @ 19.0 V - guarantees negligible error current in high-impedance bias networks |
| Junction Temp Range | –65 °C to +175 °C - validated for extended-temperature avionics, downhole, and space-qualified systems |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit common or ground node when used in standard shunt regulator configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connects to unregulated input rail - regulates voltage between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level screening ensures proven reliability for mission-critical aerospace and defense hardware |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and long-term bias stress |
| 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 drift over decades in harsh environmental deployments |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for low-dose space applications |
Applications
| Avionics Power Reference | Test Equipment Voltage Standard |
|---|---|
Use Scenario: Provides stable 25 V reference in airborne DC-DC converter feedback loops operating across –55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Shunt Zener reference regulating output voltage via optocoupler feedback path. Use Value: JANTXV qualification and +0.090 %/°C tempco ensure <±0.5% total error over full flight envelope. | Use Scenario: Serves as primary calibration reference in portable multimeters and benchtop power supplies. IC Role / Device Role / Timing Role: Precision voltage standard for DAC/ADC reference buffer stages and trimming circuits. Use Value: 1 µV/√Hz noise density and 150 Ω ZZT minimize measurement uncertainty below 10 ppm. |
| Downhole Sensor Biasing | Nuclear Instrumentation Reference |
Use Scenario: Supplies regulated bias to piezoresistive pressure sensors in oil/gas well logging tools exposed to 175 °C junction temperatures. IC Role / Device Role / Timing Role: High-temp Zener reference maintaining sensor excitation voltage under extreme thermal soak. Use Value: Validated operation to +175 °C and hermetic DO-35 package prevent parameter shift during 200+ hour downhole runs. | Use Scenario: Functions as stable reference in gamma spectroscopy pulse-height analyzers requiring ultra-low drift over multi-year deployments. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference for analog front-end gain calibration. Use Value: Inherent radiation tolerance and 10 nA leakage at 19 V suppress baseline wander in low-current detector interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4117UR-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 axial | Requires PCB re-layout for SMT assembly; no through-hole mounting option | Select when automated assembly, board space constraints, or thermal profile compatibility with reflow dominate |
| 1N5254B | 25 V, 500 mW, but only commercial-grade (no MIL-qual), 200 Ω ZZT, +0.08 %/°C tempco | Lacks JANTXV screening and radiation hardness; higher impedance limits transient response | Acceptable for industrial-grade lab equipment where cost and availability outweigh military reliability needs |
Compared with 1N4117UR-1 and 1N5254B, the 1N4117-1 uniquely combines JANTXV qualification, 150 Ω dynamic impedance, and hermetic DO-35 packaging - making it the sole choice for legacy-replacement and high-reliability analog reference designs demanding proven field history.
Availability
1N4117-1 is available at Aetrix Electronics and suitable for avionics power regulation, test equipment calibration, and downhole sensor biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4117-1 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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4117-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage reference applications in safety-critical systems where long-term stability and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N4117-1?
The 1N4117-1 has a nominal Zener voltage of 25.0 V with a standard tolerance of ±5%, as defined by JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current.
Is the 1N4117-1 suitable for surface-mount assembly?
No - the 1N4117-1 uses the axial-leaded DO-35 (DO-204AH) package and is not compatible with SMT processes. For surface-mount equivalents, Microsemi offers the 1N4117UR-1 in DO-213AA package; the 1N4117-1 requires through-hole mounting and wave or hand soldering.
What is the maximum reverse leakage current for the 1N4117-1?
The 1N4117-1 specifies a maximum reverse leakage current (IR) of 10 nA at 19.0 V, as listed in the Electrical Characteristics table. This value is measured at 25 °C and reflects the device's low leakage performance critical for high-impedance reference nodes.
Does the 1N4117-1 have radiation hardness certification?
Yes - the 1N4117-1 is inherently radiation hard, as documented in Microsemi MicroNote 050. While not individually certified to specific rad levels, its metallurgically bonded glass construction and JANTXV qualification provide proven resilience in low-dose space and nuclear instrumentation environments.
What is the thermal resistance specification for the 1N4117-1?
The 1N4117-1 has a junction-to-lead thermal resistance (RθJL) of 250 °C/W when mounted with 3/8″ (10 mm) lead length from body, per Maximum Ratings table. Junction-to-ambient RθJA is 300 °C/W on FR4 board with specified copper pad geometry.
1N4117-1 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):
- 25 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 19 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)
1N4117-1 FAQ
1.How can I place an order for 1N4117-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4117-1 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 1N4117-1 reliable?
The price and inventory of 1N4117-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4117-1 is usually 5 days.
3.What payment methods are accepted for 1N4117-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4117-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4117-1?
1N4117-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4117-1 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 1N4117-1?
For technical support, including 1N4117-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4117-1 requirements.
6.How does Aetrix verify that 1N4117-1 is sourced from the original manufacturer or authorized distributors?
All 1N4117-1 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 1N4117-1 meets industry standards.
7.What is the process for return or replacement of 1N4117-1?
All 1N4117-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4117-1, 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 1N4117-1 part is unused and in its original packaging.
Return procedure for 1N4117-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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