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Microchip Technology CDLL4117
- Part No.:
- CDLL4117
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4117.pdf
- Description:
- DIODE ZENER 25V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
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Product details
Overview
CDLL4117 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 25 V nominal Zener voltage at 250 µA test current, 150 Ω maximum Zener impedance, 19.00 V minimum Zener voltage at 15 mA, and −65°C to +175°C junction temperature range - used in precision voltage reference and overvoltage protection circuits in aerospace power supplies.
For engineers reviewing the CDLL4117 datasheet, CDLL4117 pinout, CDLL4117 application, or CDLL4117 equivalent, key selection criteria include Zener voltage tolerance (±5%), low-leakage reverse current (≤0.01 µA at 19.00 V), thermal resistance (100 °C/W max), MELF package compatibility with high-reliability reflow profiles, and MIL-PRF-19500/435 qualification for space-grade designs.
Technical Context
The CDLL4117 operates as a two-terminal voltage reference device with metallurgically bonded construction and glass-encapsulated DO-213AA case. Its Zener breakdown mechanism provides stable regulation under low-current conditions (250 µA IZT) and maintains tight voltage control across −65°C to +175°C ambient extremes.
Designed for high-reliability applications, it features 100 °C/W maximum junction-to-case thermal resistance, axial coefficient of expansion (~+6 ppm/°C) matched to ceramic and Kovar substrates, and hermetic sealing compliant with MIL-PRF-19500/435 Class JANTXV requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25 V nominal at 250 µA - defines precise clamping threshold for reference and protection circuits |
| Zener Impedance (ZZT) | 150 Ω max at 250 µA - ensures minimal voltage shift under load variation |
| Reverse Leakage (IR) | ≤0.01 µA at 19.00 V - enables ultra-low-power biasing in battery-critical systems |
| Power Dissipation | 500 mW @ TEC = +125°C - supports continuous operation in high-temperature avionics enclosures |
| Junction Temp Range | −65°C to +175°C - qualified for extreme-environment deployment without derating penalties |
| Voltage Tolerance | ±5% (no suffix) - meets MIL-PRF-19500/435 standard for unmodified CDLL4117 |
| Package | DO-213AA (MELF/LL34) - enables automated placement and high thermal cycling reliability |
Pinout & Package
DO-213AA (MELF) hermetically sealed glass package with axial leads; cathode identified by single black band. No discrete pins - two-terminal device with axial polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias | Connected to lower-potential node in shunt regulator or clamp configuration |
| Cathode (banded end) | Current exit terminal during forward bias; Zener breakdown terminal | Connected to regulated or protected node; must be held at higher potential than anode for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Enables long-term stability and moisture immunity in vacuum or high-humidity aerospace environments |
| MIL-PRF-19500/435 Class JANTXV | Validated screening for radiation-hardened, high-reliability military and space programs |
| Low 250 µA test current | Reduces quiescent power draw in always-on monitoring circuits without sacrificing regulation accuracy |
| +6 ppm/°C axial CTE | Minimizes thermo-mechanical stress when mounted on alumina or Kovar substrates |
| 100 °C/W RθJC | Supports direct thermal coupling to heat-spreading metal-core PCBs in conduction-cooled modules |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Real-time detection of 28 V bus overvoltage events in flight control power distribution units. IC Role / Device Role / Timing Role: Shunt Zener clamp protecting downstream DC-DC converters from transient surges above 25 V. Use Value: 19.00 V minimum Zener voltage ensures reliable triggering before damage threshold of 28 V rail components. | Use Scenario: Providing stable 25 V reference for ADC calibration in satellite telemetry conditioning circuits. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance and <0.01 µA leakage. Use Value: Low leakage and wide temperature range maintain reference integrity across orbital thermal cycles (−65°C to +175°C). |
| Launch Vehicle Ignition Control | High-Reliability Industrial PLC Input |
Use Scenario: Overvoltage suppression on pyro-initiator firing circuits exposed to EMI during launch vibration. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced spikes to safe levels prior to solid-state switch inputs. Use Value: Hermetic DO-213AA package withstands mechanical shock >100 g and prevents parametric drift under vibration. | Use Scenario: Isolated analog input stage protection in nuclear plant control cabinets operating at 70°C ambient. IC Role / Device Role / Timing Role: Primary Zener reference for 4–20 mA loop-powered sensor interface ICs. Use Value: 500 mW power rating and 10 mW/°C derating allow continuous operation up to +125°C end-cap temperature. |
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 Zener voltage (25 V), identical DO-213AA package, but qualified to MIL-PRF-19500/435 Class JANTXV with full lot traceability | Required for DoD procurement where UR-1 suffix denotes certified military-grade screening | Select 1N4117UR-1 when formal MIL-spec compliance documentation and lot-level test reports are mandatory |
| BZX84-C24LT1G | 24 V nominal Zener, SOT-23 package, ±5% tolerance, 100 Ω ZZT, but not hermetically sealed or MIL-qualified | Suitable only for commercial industrial use; lacks radiation tolerance and extended temperature capability | Choose BZX84-C24LT1G only for cost-sensitive terrestrial applications where −65°C to +175°C operation is unnecessary |
Compared with CDLL4117, 1N4117UR-1 offers identical electrical performance with enhanced traceability for defense programs, while BZX84-C24LT1G trades reliability and temperature range for compact size and lower cost in non-mission-critical systems.
Availability
CDLL4117 is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, and launch vehicle ignition control requiring stable component supply with full MIL-PRF-19500/435 compliance documentation.
Supply support for CDLL4117 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The CDLL4117 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical systems where hermeticity, radiation tolerance, and extreme temperature resilience are mandatory.
FAQ
What is the Zener voltage tolerance for CDLL4117?
The CDLL4117 has a nominal Zener voltage of 25 V with a tolerance of ±5%, as specified in Note 1 of the official Microsemi datasheet. This tolerance applies to the base CDLL4117 part number without any suffix; a "C" suffix would indicate ±2%, and a "D" suffix ±1%. The CDLL4117 is tested at 25°C ±3°C with the device junction in thermal equilibrium.
Is CDLL4117 hermetically sealed and qualified to MIL-PRF-19500/435?
Yes, CDLL4117 is hermetically sealed in a DO-213AA glass package and fully qualified to MIL-PRF-19500/435 per the manufacturer's documentation. It meets Class JANTXV screening requirements, including temperature cycling, burn-in, and parameter verification - making CDLL4117 suitable for spaceflight and high-reliability defense applications.
What is the maximum reverse leakage current for CDLL4117 and at what voltage is it measured?
The maximum reverse leakage current for CDLL4117 is 0.01 µA, measured at a reverse voltage of 19.00 V - which corresponds to the minimum specified Zener voltage (VZ) at 15 mA. This ultra-low leakage supports energy-efficient biasing in always-on monitoring circuits where standby current must remain below 100 nA.
Can CDLL4117 be used in surface-mount reflow processes?
Yes, CDLL4117 uses a DO-213AA (MELF/LL34) leadless surface-mount package compatible with standard reflow soldering profiles. Its glass body and tin/lead lead finish support peak temperatures up to 260°C for ≤10 seconds. Thermal impedance is 35 °C/W maximum, and its +6 ppm/°C axial CTE minimizes stress during thermal cycling on ceramic substrates.
What is the power derating behavior of CDLL4117 above +125°C?
CDLL4117 has a DC power dissipation rating of 500 mW at TEC = +125°C, with linear derating of 10 mW/°C above that temperature. At +150°C end-cap temperature, its usable power drops to 475 mW; at +175°C, it is 450 mW. This derating curve is defined in Figure 2 of the official datasheet and assumes proper thermal path design to limit junction temperature rise.
CDLL4117 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- 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:
- 50 nA @ 19 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB
CDLL4117 FAQ
1.How can I place an order for CDLL4117 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4117 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 CDLL4117 reliable?
The price and inventory of CDLL4117 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4117 is usually 5 days.
3.What payment methods are accepted for CDLL4117?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4117 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4117?
CDLL4117 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4117 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 CDLL4117?
For technical support, including CDLL4117 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4117 requirements.
6.How does Aetrix verify that CDLL4117 is sourced from the original manufacturer or authorized distributors?
All CDLL4117 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 CDLL4117 meets industry standards.
7.What is the process for return or replacement of CDLL4117?
All CDLL4117 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4117, 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 CDLL4117 part is unused and in its original packaging.
Return procedure for CDLL4117:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4117 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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