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Microchip Technology CDLL4101
- Part No.:
- CDLL4101
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4101.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,297
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Product details
Overview
CDLL4101 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 8.2 V nominal Zener voltage at 250 µA test current, 200 Ω Zener impedance, 1.0 µA maximum reverse leakage at 6.24 V, and 46 mA maximum Zener current - used for precision voltage reference and overvoltage protection in aerospace-grade power regulation circuits.
For engineers reviewing the CDLL4101 datasheet, CDLL4101 pinout, CDLL4101 application, or CDLL4101 equivalent, key selection criteria include its ±5% Zener tolerance, -65°C to +175°C junction temperature range, 500 mW power dissipation at 125°C, low-leakage cathode-biased operation, and MIL-PRF-19500/435 qualification for high-reliability analog signal conditioning.
Technical Context
The CDLL4101 operates as a two-terminal voltage reference device with metallurgically bonded construction and hermetic glass sealing. Its Zener breakdown mechanism delivers stable regulation under low-current conditions (250 µA), with thermal resistance of 100 °C/W at L = 0 inch and axial coefficient of expansion (~6 ppm/°C) matched to ceramic or Kovar substrates.
It complies with MIL-PRF-19500/435 for JAN/JANTX/JANTXV/JANS screening levels and is specified for use with banded (cathode) end positive polarity. Reverse leakage remains ≤1.0 µA up to 6.24 V, supporting low-power biasing and sensing functions in harsh-environment analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±5% at IZT = 250 µA - defines regulated output level for reference circuits |
| Zener Impedance (ZZT) | 200 Ω max at 250 µA - determines regulation stiffness under load transients |
| Reverse Leakage (IR) | ≤1.0 µA at VR = 6.24 V - ensures minimal error current in high-impedance bias networks |
| Max Zener Current (IZM) | 46 mA - sets upper limit for continuous power dissipation without derating |
| Junction Temp Range | -65°C to +175°C - enables operation in extended-temperature avionics and downhole electronics |
| Power Dissipation | 500 mW @ TEC = +125°C - supports stable thermal performance in conduction-cooled modules |
Pinout & Package
Package: DO-213AA (MELF/LL34), hermetically sealed glass case, lead finish: tin/lead, axial symmetry, cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (banded end) | Zener breakdown terminal | Connected to higher-potential node; defines regulated voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualified | Meets military screening requirements for JAN/JANTX/JANTXV/JANS grades - assured reliability in mission-critical systems |
| Hermetic glass seal | Prevents moisture ingress and long-term parameter drift - critical for >10-year field life in sealed assemblies |
| Low-current operation | Stable Zener regulation at 250 µA - enables ultra-low-power reference design without active buffering |
| Thermal expansion match | Axial COE ≈6 ppm/°C - minimizes mechanical stress when mounted on alumina or Kovar substrates |
Applications
| Aerospace Power Monitoring | Downhole Sensor Biasing |
|---|---|
Use Scenario: Voltage reference for ADC input scaling in satellite power management units exposed to radiation and thermal cycling. IC Role / Device Role / Timing Role: Zener reference diode providing stable 8.2 V reference for precision analog-to-digital conversion. Use Value: ±5% tolerance and -65°C to +175°C operation ensure consistent ADC full-scale calibration across orbital temperature extremes. | Use Scenario: Biasing network for piezoresistive pressure sensors in oil/gas well logging tools operating at 175°C ambient. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) Zener element establishing fixed bias point for sensor bridge excitation. Use Value: Hermetic DO-213AA package prevents parameter shift under high-humidity, high-pressure downhole conditions. |
| Avionics Voltage Clamp | Military Radio RF Detector |
Use Scenario: Overvoltage clamp protecting analog front-end inputs in flight control system interface cards. IC Role / Device Role / Timing Role: Transient suppression diode clamping induced surges to 8.2 V during ESD or lightning-induced coupling events. Use Value: 46 mA IZM and 200 Ω ZZT enable fast, repeatable clamping without thermal runaway in compact PCB layouts. | Use Scenario: DC restoration and envelope detection in UHF/VHF military radio receiver IF stages. IC Role / Device Role / Timing Role: Precision Zener reference setting detector threshold and DC offset compensation level. Use Value: Stable 8.2 V reference at 250 µA allows accurate RF signal amplitude measurement with minimal quiescent current draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4101UR-1 | Same Zener voltage (8.2 V), identical DO-213AA package, but rated for JANTXV screening only - no JANS option available | Qualified for space-level radiation hardness per MIL-PRF-19500/435 Class V only, not Class S (JANS) | Select when JANTXV screening suffices and JANS-level radiation tolerance is not required |
| CDLL4101C | Same package and electrical specs, but ±2% Zener tolerance (C suffix) instead of ±5% (no suffix) | Higher precision reference needed for metrology-grade instrumentation where tighter voltage stability is mandatory | Select when tighter tolerance justifies cost premium and tighter thermal drift budget permits |
Compared with CDLL4101, 1N4101UR-1 offers identical voltage and package but lacks JANS qualification, while CDLL4101C improves tolerance to ±2% at higher cost - choice depends on radiation hardness and precision requirements, not pin compatibility or layout reuse.
Availability
CDLL4101 is available at Aetrix Electronics and suitable for aerospace power monitoring, downhole sensor biasing, avionics voltage clamping, and military radio RF detection requiring stable component supply across extended temperature and radiation environments.
Supply support for CDLL4101 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial applications.
The CDLL4099–CDLL4135 series targets precision voltage reference and overvoltage protection in mission-critical systems where hermeticity, wide temperature range, and MIL-spec compliance are mandatory.
FAQ
What is the Zener voltage tolerance for CDLL4101?
The CDLL4101 has a nominal Zener voltage of 8.2 V with a tolerance of ±5%, as defined in Note 1 of the datasheet. This tolerance applies when measured at 25°C ±3°C with the device in thermal equilibrium. The CDLL4101 does not carry a "C" (±2%) or "D" (±1%) suffix, confirming its standard ±5% grade.
Is CDLL4101 suitable for high-temperature downhole applications?
Yes, CDLL4101 is rated for junction temperatures from -65°C to +175°C and features a hermetically sealed DO-213AA glass package, making it suitable for downhole sensor biasing in oil/gas logging tools. Its 1.0 µA reverse leakage at 6.24 V and stable Zener impedance support reliable operation under sustained high-temperature stress.
Does CDLL4101 require heatsinking in typical PCB layouts?
No, CDLL4101 does not require external heatsinking in standard applications. With a thermal resistance of 100 °C/W at L = 0 inch and 500 mW power dissipation capability at 125°C end-cap temperature, it operates within safe limits under typical 46 mA Zener current loads on FR4 or ceramic substrates without forced cooling.
What is the polarity marking convention for CDLL4101?
The CDLL4101 uses cathode-band polarity marking: the banded end is the cathode and must be connected to the higher-potential node in Zener regulation mode. The device is intended for reverse-biased operation only, and forward conduction is not part of its functional specification.
Can CDLL4101 replace CDLL4100 or CDLL4102 in an existing design?
CDLL4101 can be substituted for CDLL4100 (7.5 V) or CDLL4102 (8.7 V) only if the circuit's voltage reference or clamping threshold is specifically designed to accommodate an 8.2 V Zener. Electrical differences - including 0.7 V higher than CDLL4100 and 0.5 V lower than CDLL4102 - directly affect regulation accuracy and must be verified in system-level testing before replacement.
CDLL4101 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6.3 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
CDLL4101 FAQ
1.How can I place an order for CDLL4101 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4101 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 CDLL4101 reliable?
The price and inventory of CDLL4101 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4101 is usually 5 days.
3.What payment methods are accepted for CDLL4101?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4101 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4101?
CDLL4101 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4101 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 CDLL4101?
For technical support, including CDLL4101 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4101 requirements.
6.How does Aetrix verify that CDLL4101 is sourced from the original manufacturer or authorized distributors?
All CDLL4101 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 CDLL4101 meets industry standards.
7.What is the process for return or replacement of CDLL4101?
All CDLL4101 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4101, 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 CDLL4101 part is unused and in its original packaging.
Return procedure for CDLL4101:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4101 Tags
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MMBZ5240B-7-F
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