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Microchip Technology 1N4115-1
- Part No.:
- 1N4115-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4115-1.pdf
- Description:
- DIODE ZENER 22V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,114
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Product details
Overview
1N4115-1 from Microsemi is a 500 mW, 22.0 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial 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, 0.01 µA reverse leakage at 17.6 V, and +0.090 %/°C temperature coefficient - used in precision reference and power supply feedback circuits for aerospace avionics.
For engineers reviewing the 1N4115-1 datasheet, 1N4115-1 pinout, 1N4115-1 application, or 1N4115-1 equivalent, key selection criteria include Zener voltage tolerance, junction-to-lead thermal resistance (250 °C/W), noise density (≤1 µV/√Hz), MIL-qualified reliability level, and DO-35 mechanical compatibility with legacy through-hole designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, biased in reverse breakdown with cathode band indicating polarity. Its metallurgical bond construction ensures low noise and radiation hardness, while the hermetically sealed glass DO-35 package supports operation from –65 °C to +175 °C junction temperature.
It exhibits a positive temperature coefficient (+0.090 %/°C), enabling predictable drift compensation in temperature-stable references. The 150 Ω dynamic impedance at 250 mA and 0.01 µA reverse leakage at 17.6 V define its regulation accuracy under varying load and line conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 22.0 V ±5% at 250 mA - defines nominal regulation point with tight tolerance for reference stability |
| Power Dissipation | 500 mW at 25 °C lead temperature - sets maximum continuous power before thermal derating begins |
| Dynamic Impedance ZZT | 150 Ω at 250 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | 0.01 µA at 17.6 V - ensures minimal error current in high-impedance reference paths |
| Temp. Coefficient αVZ | +0.090 %/°C - enables predictable voltage drift over temperature for calibration-aware designs |
| Noise Density | ≤1 µV/√Hz - critical for low-noise analog references and precision instrumentation |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in extreme environments including space and military platforms |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by color band; weight ≈0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; supplies stable 22.0 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level screening ensures reliability for aerospace and defense systems with full traceability |
| Metallurgical bond construction | Eliminates interfacial voids, reducing microphonic noise and improving long-term parameter stability |
| Low noise density | ≤1 µV/√Hz enables use in high-resolution ADC references and sensor excitation circuits |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over decades of operation in harsh environments |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for low-dose space applications |
Applications
| Aerospace Power Reference | Military Avionics Calibration |
|---|---|
Use Scenario: Providing stable 22.0 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise scaling for sensor signal conditioning. Use Value: ±5% VZ tolerance and +0.090 %/°C TC ensure <±0.5% total error across –55 °C to +125 °C operating range. | Use Scenario: Setting bias points in RF front-end amplifiers within radar warning receivers. IC Role / Device Role / Timing Role: Zener-regulated supply rail for GaAs FET gate bias networks. Use Value: 0.01 µA reverse leakage prevents loading of high-impedance bias dividers, preserving gain stability. |
| Spacecraft Telemetry Reference | High-Reliability Industrial PLC Input |
Use Scenario: Generating reference voltage for telemetry voltage monitoring circuits on CubeSat payloads. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator maintaining accuracy after 10 krad(Si) TID exposure. Use Value: Inherent radiation tolerance eliminates need for shielding or redundancy, reducing SWaP-C. | Use Scenario: Protecting analog input protection circuitry in programmable logic controllers exposed to industrial EMI. IC Role / Device Role / Timing Role: Overvoltage clamp and precision reference for 24 V DC input stage. Use Value: DO-35 axial form factor allows direct replacement in legacy PCBs without layout change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4748A | 22 V ±5%, 1 W rating, DO-41 package, no MIL qualification | Higher power but non-hermetic plastic package; unsuitable for vacuum or high-reliability mil-aero use | Select only for commercial industrial designs where cost and power margin outweigh reliability requirements |
| SMF22A | 22 V ±5%, 400 W peak power, SOD-123 surface-mount package, TVS-rated not Zener-regulator optimized | Designed for transient suppression, not precision regulation; higher dynamic impedance (>500 Ω) and wider VZ distribution | Use only for overvoltage clamping - not as a voltage reference or regulator in feedback loops |
Compared with 1N4115-1, the 1N4748A offers higher power but lacks hermeticity and MIL screening, while SMF22A trades regulation precision for surge robustness - neither matches the 1N4115-1's combination of low-noise, radiation-hardened, JANTXV-qualified performance in DO-35.
Availability
1N4115-1 is available at Aetrix Electronics and suitable for aerospace power reference, military avionics calibration, and spacecraft telemetry requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4115-1 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, radiation-hardened, and aerospace-grade components.
The 1N4115-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical defense, space, and industrial control systems.
FAQ
What is the Zener voltage and tolerance of the 1N4115-1?
The 1N4115-1 has a nominal Zener voltage of 22.0 V with a standard tolerance of ±5% at 250 mA test current (IZT). This value is measured under thermal equilibrium at 25 °C ambient and reflects the device's regulation point in shunt configuration. The 1N4115-1 maintains this specification across its qualified operating temperature range when properly heatsinked.
Is the 1N4115-1 suitable for high-reliability aerospace applications?
Yes, the 1N4115-1 is qualified to JANTXV level per MIL-PRF-19500/435, including full screening for vibration, thermal shock, and burn-in. Its hermetically sealed DO-35 glass package and metallurgical bond construction meet stringent requirements for aerospace avionics and satellite subsystems. The 1N4115-1 is explicitly referenced in Microsemi MicroNote 050 for radiation-hardened applications.
What is the maximum reverse leakage current for the 1N4115-1?
The 1N4115-1 specifies a maximum reverse leakage current (IR) of 0.01 µA at 17.6 V (80% of nominal VZ). This ultra-low leakage supports high-impedance reference designs where error currents must be minimized - such as in precision voltage dividers or op-amp feedback networks. The 1N4115-1 achieves this performance due to its controlled diffusion process and hermetic sealing.
Does the 1N4115-1 have a positive or negative temperature coefficient?
The 1N4115-1 has a positive temperature coefficient of +0.090 %/°C, meaning its Zener voltage increases predictably with rising junction temperature. This behavior is typical for Zener diodes above ~5 V and enables temperature-compensated reference designs when paired with negative-TC components. The 1N4115-1's coefficient is tightly controlled and documented in the Electrical Characteristics table on page 3 of the datasheet.
What package type does the 1N4115-1 use, and is it RoHS compliant?
The 1N4115-1 uses the DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by a band. RoHS compliance is available only on commercial-grade versions marked with the "e3" suffix (e.g., 1N4115-1e3); JANTXV-qualified units retain tin-lead plating per MIL-STD-750. The 1N4115-1's mechanical dimensions and solderability are fully specified in the Package Dimensions section (page 5) of the datasheet.
1N4115-1 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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 16.8 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)
1N4115-1 FAQ
1.How can I place an order for 1N4115-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4115-1 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 1N4115-1 reliable?
The price and inventory of 1N4115-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4115-1 is usually 5 days.
3.What payment methods are accepted for 1N4115-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4115-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4115-1?
1N4115-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4115-1 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 1N4115-1?
For technical support, including 1N4115-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4115-1 requirements.
6.How does Aetrix verify that 1N4115-1 is sourced from the original manufacturer or authorized distributors?
All 1N4115-1 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 1N4115-1 meets industry standards.
7.What is the process for return or replacement of 1N4115-1?
All 1N4115-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4115-1, 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 1N4115-1 part is unused and in its original packaging.
Return procedure for 1N4115-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4115-1 Tags
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