My Inquiry
My Account
Microchip Technology CDLL4114
- Part No.:
- CDLL4114
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4114.pdf
- Description:
- DIODE ZENER 20V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,163
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CDLL4114 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 20 V nominal Zener voltage at 250 µA test current, 150 Ω maximum Zener impedance, 0.01 µA maximum reverse leakage at 15.2 V, and 19 mA maximum Zener current. It operates across –65°C to +175°C junction temperature and is used in precision voltage reference and overvoltage protection circuits in aerospace power supplies.
For engineers reviewing the CDLL4114 datasheet, CDLL4114 pinout, CDLL4114 application, or CDLL4114 equivalent, key selection criteria include its ±5% Zener tolerance, low-leakage cathode-biased operation, thermal stability up to +175°C, and compatibility with high-reliability MIL-PRF-19500/435 screening levels (JANTXV).
Technical Context
The CDLL4114 functions as a two-terminal voltage reference device with metallurgically bonded construction and axial coefficient of expansion matched to ceramic substrates. Its Zener impedance is measured using 25 µA AC superimposed on 250 µA DC test current, and it exhibits 10 mW/°C derating above +125°C case temperature.
Designed for low-current regulation, the CDLL4114 maintains stable 20 V breakdown under 250 µA bias and supports reverse leakage as low as 0.01 µA at 15.2 V - critical for battery-backed and low-power sensing nodes where standby current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at IZT = 250 µA - defines precise clamping threshold for voltage-sensitive circuits |
| Zener Impedance (ZZT) | 150 Ω max - ensures minimal voltage shift under load variation in reference applications |
| Reverse Leakage (IR) | 0.01 µA max at VR = 15.2 V - enables ultra-low quiescent current in always-on monitoring systems |
| Max Zener Current (IZM) | 19 mA - sets safe continuous dissipation limit at rated 500 mW power |
| Junction Temp Range | –65°C to +175°C - supports operation in extreme environments including avionics and downhole tools |
| Package | DO-213AA (MELF/LL34), hermetically sealed glass - provides moisture immunity and long-term parameter stability |
Pinout & Package
DO-213AA (MELF/LL34) hermetically sealed glass package with axial leads; polarity marked by cathode band; lead finish: tin/lead; thermal resistance RθJC = 100 °C/W (L = 0 inch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; required for proper biasing in shunt regulator topologies |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node; defines 20 V reference point when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over decades in mission-critical systems |
| MIL-PRF-19500/435 qualified | Meets JANTXV screening requirements for radiation-hardened, high-reliability aerospace use |
| Low 250 µA operating current | Enables integration into energy-constrained subsystems without burdening upstream regulators |
| +6 ppm/°C axial CTE match | Minimizes mechanical stress when mounted on alumina or similar low-CTE substrates |
Applications
| Aerospace Power Supervision | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Monitoring 28 V bus integrity in satellite power distribution units with >15-year service life. IC Role / Device Role / Timing Role: Shunt voltage reference providing fault-trigger threshold for undervoltage/overvoltage comparators. Use Value: ±5% tolerance and <0.01 µA leakage ensure stable trip points despite thermal cycling and radiation exposure. | Use Scenario: Providing stable 20 V reference for analog sensor signal conditioning in oil/gas well logging tools. IC Role / Device Role / Timing Role: Precision Zener element in ratiometric ADC bias networks operating at +175°C ambient. Use Value: Hermetic DO-213AA package and –65°C to +175°C rating prevent calibration drift under extreme downhole conditions. |
| Avionics Voltage Clamp | High-Reliability Industrial PLC Input |
Use Scenario: Protecting FPGA I/O banks from transients on 20 V auxiliary rails in flight control computers. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp absorbing ESD and switching spikes. Use Value: 150 Ω ZZT and 19 mA IZM enable controlled clamping without thermal runaway during repeated surges. | Use Scenario: Setting accurate input thresholds for 24 V digital inputs in nuclear plant safety controllers. IC Role / Device Role / Timing Role: Zener-based level translator defining logic-high detection boundary. Use Value: JANTXV qualification and 100 °C/W thermal resistance support long-term reliability in sealed, fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4104UR-1 | Same 20 V nominal Zener voltage but JANTXV-rated; identical DO-213AA package and 150 Ω ZZT | Qualified to same MIL-PRF-19500/435 spec; differs only in part numbering convention (UR-1 vs CDLL) | Select 1N4104UR-1 when procurement requires explicit UR-series military nomenclature |
| BZX84-C20LT1G | 20 V ±5%, SOT-23 package, 100 Ω ZZT, but only commercial temp range (–65°C to +150°C) and no MIL screening | Not suitable for aerospace or extended-temperature industrial use; lacks hermetic seal and JANTXV validation | Choose BZX84-C20LT1G only for cost-sensitive, non-mission-critical consumer designs with standard temperature requirements |
Compared with 1N4104UR-1 and BZX84-C20LT1G, the CDLL4114 offers identical electrical performance and military-grade reliability in a proven hermetic MELF form factor - making it the preferred choice where long-term parametric stability and extreme-temperature operation are mandatory.
Availability
CDLL4114 is available at Aetrix Electronics and suitable for aerospace power supervision, downhole instrumentation reference, and avionics voltage clamp applications requiring stable component supply across extended product lifecycles.
Supply support for CDLL4114 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 defense, aerospace, and industrial markets.
The CDLL4114 belongs to Microsemi's legacy MIL-PRF-19500/435 Zener diode family, engineered specifically for voltage reference and transient suppression in harsh-environment systems where hermeticity, temperature resilience, and long-term stability are non-negotiable.
FAQ
What is the Zener voltage tolerance for CDLL4114?
The CDLL4114 has a nominal Zener voltage of 20 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. The CDLL4114 does not carry a "C" (±2%) or "D" (±1%) suffix, so its tolerance remains ±5%.
Is CDLL4114 suitable for high-temperature operation?
Yes, the CDLL4114 is rated for junction and storage temperatures from –65°C to +175°C, and its power dissipation is derated linearly at 10 mW/°C above +125°C case temperature. This makes the CDLL4114 appropriate for downhole, avionics, and other high-temperature applications where conventional Zeners fail.
What package type does CDLL4114 use?
The CDLL4114 uses the DO-213AA package - also known as MELF or LL34 - a hermetically sealed cylindrical glass case designed for surface-mount assembly. Dimensions are D = 1.60–1.70 mm, G = 3.30–3.70 mm, and F = 0.41–0.55 mm, with tin/lead lead finish.
Does CDLL4114 meet any military specifications?
Yes, the CDLL4114 is manufactured per MIL-PRF-19500/435 and is available in JANTXV screening levels. It meets requirements for hermeticity, temperature cycling, burn-in, and parameter verification defined in that specification - confirming its suitability for high-reliability defense and space programs.
How is polarity identified on CDLL4114?
The CDLL4114 is marked with a cathode band on the glass body - the banded end is the cathode and must be connected to the more positive potential during Zener operation. This polarity marking is consistent across all DO-213AA devices and is verified in Figure 1 of the Microsemi datasheet.
CDLL4114 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 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
CDLL4114 FAQ
1.How can I place an order for CDLL4114 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4114 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 CDLL4114 reliable?
The price and inventory of CDLL4114 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4114 is usually 5 days.
3.What payment methods are accepted for CDLL4114?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4114 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4114?
CDLL4114 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4114 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 CDLL4114?
For technical support, including CDLL4114 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4114 requirements.
6.How does Aetrix verify that CDLL4114 is sourced from the original manufacturer or authorized distributors?
All CDLL4114 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 CDLL4114 meets industry standards.
7.What is the process for return or replacement of CDLL4114?
All CDLL4114 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4114, 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 CDLL4114 part is unused and in its original packaging.
Return procedure for CDLL4114:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4114 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
