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Microchip Technology CDLL4115
- Part No.:
- CDLL4115
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4115.pdf
- Description:
- DIODE ZENER 22V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,056
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Product details
Overview
CDLL4115 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 22 V nominal Zener voltage at 250 µA test current, 150 Ω maximum Zener impedance, 16.72 V minimum Zener voltage at 17 mA, and operating junction temperature range of –65°C to +175°C; used for precision voltage reference and overvoltage protection in aerospace power conditioning circuits.
For engineers reviewing the CDLL4115 datasheet, CDLL4115 pinout, CDLL4115 application, or CDLL4115 equivalent, key selection criteria include its ±5% Zener tolerance, low-leakage performance (≤10 nA at 16.72 V), thermal stability up to +175°C, and compatibility with high-reliability MIL-PRF-19500/435 screening levels.
Technical Context
The CDLL4115 operates as a two-terminal voltage-reference device relying on controlled reverse-biased avalanche breakdown in a metallurgically bonded silicon junction. Its Zener voltage is specified at 250 µA test current with 150 Ω dynamic impedance, enabling stable regulation under low-current bias conditions typical in sensor excitation and reference divider networks.
Designed for hermetic glass encapsulation in DO-213AA, the CDLL4115 exhibits a thermal resistance of 100 °C/W (junction-to-end-cap) and axial coefficient of expansion (~6 ppm/°C), requiring matched PCB substrate selection to minimize mechanical stress during thermal cycling in avionics and space-grade assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal at IZT = 250 µA; defines precise clamping/reference level in low-power analog circuits |
| Zener Tolerance | ±5% (no suffix); ensures predictable voltage margin for safety-critical overvoltage thresholds |
| Zener Impedance (ZZT) | 150 Ω max at IZT = 250 µA; limits output voltage variation under load transients |
| Reverse Leakage (IR) | ≤10 nA at VR = 16.72 V; enables ultra-low standby current in battery-backed systems |
| Power Dissipation | 500 mW @ TEC = +125°C; supports operation in high-ambient industrial environments with derating |
| Junction Temp Range | –65°C to +175°C; qualified for extended-temperature deployment in engine control and downhole electronics |
Pinout & Package
DO-213AA (MELF/LL34) hermetically sealed glass package with axial leads; cathode identified by single black band; no discrete pins - terminals are axial metallized ends.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current sink in reverse bias | Connected to lower-potential node; forms reference ground return path |
| Cathode (banded end) | Regulated voltage output | Provides stable 22 V reference when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Enables long-term reliability in high-humidity, corrosive, or vacuum environments per MIL-PRF-19500/435 |
| Metallurgical bonding | Ensures robust interfacial integrity between silicon die and lead frame under thermal shock |
| Low-current operation | Stable regulation at 250 µA enables use in micropower sensor interfaces and wake-up circuits |
| High-temperature capability | Rated to +175°C junction temperature supports integration into engine-mounted control modules |
Applications
| Aerospace Power Supervision | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Monitoring 28 V aircraft bus voltage with fault detection logic. IC Role / Device Role / Timing Role: Zener reference for comparator threshold setting in power-good circuitry. Use Value: ±5% tolerance and 16.72 V minimum Zener voltage ensure reliable trip point across temperature and life. | Use Scenario: Providing stable excitation voltage to piezoresistive pressure sensors in oil/gas well tools. IC Role / Device Role / Timing Role: Low-drift voltage reference source in high-temperature analog front-end. Use Value: Hermetic DO-213AA package and –65°C to +175°C rating prevent parametric shift under extreme downhole conditions. |
| Avionics Sensor Biasing | MIL-SPEC Voltage Clamping |
Use Scenario: Biasing MEMS gyroscope interface amplifiers in inertial navigation units. IC Role / Device Role / Timing Role: Precision low-current reference for op-amp feedback networks. Use Value: 150 Ω Zener impedance minimizes gain error drift caused by supply current variation. | Use Scenario: Transient suppression on 24 V military vehicle data bus lines. IC Role / Device Role / Timing Role: Overvoltage clamp protecting CAN transceivers from load-dump spikes. Use Value: 22 V nominal Zener voltage provides headroom above 24 V nominal rail while limiting clamping energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4115UR-1 | Same Zener voltage (22 V), identical DO-213AA package, but screened to JANTXV level per MIL-PRF-19500/435 | Required for programs mandating radiation-hardened or enhanced screening beyond standard CDLL grade | Select 1N4115UR-1 when full MIL-PRF-19500/435 JANTXV qualification is contractually required |
| BZX84-C22LT1G | 22 V Zener, SOT-23 package, ±5% tolerance, but plastic encapsulation and max 150 °C junction temp | Suitable for commercial/industrial designs where hermeticity and extended temperature are not mandatory | Choose BZX84-C22LT1G only for cost-sensitive, non-military applications with ambient < +125°C |
Compared with CDLL4115, 1N4115UR-1 offers higher reliability screening without electrical change, while BZX84-C22LT1G trades hermeticity and temperature range for smaller size and lower cost - making CDLL4115 the sole choice for extended-temperature, high-reliability deployments.
Availability
CDLL4115 is available at Aetrix Electronics and suitable for aerospace power supervision, downhole instrumentation reference, and avionics sensor biasing requiring stable component supply with traceable MIL-PRF-19500/435 compliance.
Supply support for CDLL4115 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The CDLL4115 belongs to Microsemi's legacy family of hermetic Zener diodes designed specifically for extended-temperature, high-stability voltage reference and protection in mission-critical systems.
FAQ
What is the Zener voltage tolerance for CDLL4115?
The CDLL4115 has a nominal Zener voltage of 22 V with a tolerance of ±5%, as specified in Note 1 of the official Microsemi datasheet. This tolerance applies when measured at 25°C ambient with the device in thermal equilibrium. No suffix (e.g., "C" or "D") is present on the CDLL4115 marking, confirming the standard ±5% grade.
Does CDLL4115 meet MIL-PRF-19500/435 requirements?
Yes, CDLL4115 is manufactured and tested per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels. It is explicitly listed alongside the 1N4099UR-1 through 1N4135UR-1 series in the specification document, confirming its qualification for high-reliability military and aerospace applications.
What is the maximum reverse leakage current for CDLL4115?
The CDLL4115 specifies a maximum reverse leakage current of 10 nA at a reverse voltage of 16.72 V (the minimum Zener voltage). This value is confirmed in the Electrical Characteristics table and reflects its suitability for ultra-low-power reference and sensing applications.
Can CDLL4115 be used in surface-mount assembly processes?
Yes, CDLL4115 uses the DO-213AA (MELF/LL34) leadless glass package, which is explicitly designated for surface-mount applications. Its dimensions (D: 1.60–1.70 mm, G: 3.30–3.70 mm) and tin/lead lead finish are compatible with standard reflow soldering profiles for high-reliability SMT assembly.
What is the thermal resistance of CDLL4115 and how does it affect layout?
The CDLL4115 has a maximum junction-to-end-cap thermal resistance (RθJC) of 100 °C/W at L = 0 inch. This requires careful PCB pad design and substrate COE matching (~6 ppm/°C) to avoid mechanical stress-induced failure during thermal cycling - especially critical in avionics and downhole applications.
CDLL4115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- 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:
- 50 nA @ 16.8 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
CDLL4115 FAQ
1.How can I place an order for CDLL4115 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4115 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 CDLL4115 reliable?
The price and inventory of CDLL4115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4115 is usually 5 days.
3.What payment methods are accepted for CDLL4115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4115?
CDLL4115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4115 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 CDLL4115?
For technical support, including CDLL4115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4115 requirements.
6.How does Aetrix verify that CDLL4115 is sourced from the original manufacturer or authorized distributors?
All CDLL4115 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 CDLL4115 meets industry standards.
7.What is the process for return or replacement of CDLL4115?
All CDLL4115 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4115, 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 CDLL4115 part is unused and in its original packaging.
Return procedure for CDLL4115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4115 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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