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Microchip Technology CDLL4119
- Part No.:
- CDLL4119
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4119.pdf
- Description:
- DIODE ZENER 28V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,111
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Product details
Overview
CDLL4119 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 28 V nominal Zener voltage at 250 µA test current, with 200 Ω maximum Zener impedance, 0.01 µA maximum reverse leakage at 21.28 V, and 14 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 CDLL4119 datasheet, CDLL4119 pinout, CDLL4119 application, or CDLL4119 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (100 °C/W), low-current regulation capability (250 µA), hermetic glass packaging, and MIL-PRF-19500/435 qualification for high-reliability environments.
Technical Context
The CDLL4119 functions as a two-terminal voltage reference device with metallurgically bonded P-N junction, optimized for stable regulation under low-current conditions (250 µA). Its Zener impedance of ≤200 Ω at 25°C ensures minimal voltage variation with load changes in feedback networks.
Designed for hermetic reliability, it features a DO-213AA glass MELF case with tin/lead lead finish and axial coefficient of expansion (~6 ppm/°C) matched for ceramic or Kovar mounting substrates. Thermal impedance is specified at 35 °C/W, supporting operation up to 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28 V ±5% at 250 µA - defines precise clamping/reference level in analog control loops |
| Zener Impedance (ZZT) | ≤200 Ω - ensures <±15 mV output shift per 3 mA load change near regulation point |
| Reverse Leakage (IR) | ≤0.01 µA at 21.28 V - enables ultra-low standby current in battery-backed circuits |
| Max Zener Current (IZM) | 14 mA - sets upper limit for continuous power dissipation (500 mW @ TEC = 125°C) |
| Junction Temp Range | -65°C to +175°C - supports operation in extended-temperature avionics and downhole electronics |
| Package | DO-213AA (MELF/LL34) - surface-mount, hermetically sealed glass case for moisture resistance and long-term stability |
Pinout & Package
DO-213AA (MELF) package: cylindrical glass body with metallized end caps; polarity marked by cathode band on one end. No discrete pins - terminals are axial end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Positive terminal during reverse-bias conduction | Connected to regulated output node; must be held at higher potential than anode for Zener operation |
| Anode End Cap | Reference/ground terminal | Typically tied to system ground or feedback divider low-side; establishes reference potential for voltage sensing |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 Qualified | Meets military screening requirements including burn-in, temperature cycling, and hermeticity testing for space-grade reliability |
| Hermetic Glass Encapsulation | Prevents moisture ingress and parameter drift over decades in harsh environments |
| Low Test Current Operation | Stable 28 V regulation at only 250 µA - enables use in ultra-low-power sensor biasing and wake-up circuits |
| Thermal Expansion Match | ~6 ppm/°C COE - minimizes mechanical stress when mounted on ceramic PCBs or metal-core substrates |
Applications
| Aerospace Power Regulation | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Voltage reference in DC-DC converter feedback network for satellite power bus conditioning. IC Role / Device Role / Timing Role: Zener diode providing stable 28 V reference for error amplifier input. Use Value: ±5% tolerance and ≤200 Ω impedance ensure <±0.5% output voltage accuracy over temperature and life. | Use Scenario: Overvoltage clamp protecting analog front-end of oil-well pressure transducer operating at 175°C. IC Role / Device Role / Timing Role: Two-terminal transient suppressor and steady-state voltage limiter. Use Value: Hermetic DO-213AA package and -65°C to +175°C rating prevent failure in high-temperature borehole environments. |
| Avionics Sensor Biasing | Military Radio RF Stage Protection |
Use Scenario: Bias voltage source for MEMS gyroscope interface circuitry in inertial measurement units. IC Role / Device Role / Timing Role: Low-current (250 µA) Zener reference enabling microamp-level system sleep current. Use Value: 0.01 µA reverse leakage at 21.28 V preserves battery life in always-on navigation subsystems. | Use Scenario: Input-stage overvoltage protection for HF receiver front-end exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting RF amplifier supply rail to 28 V. Use Value: Metallurgically bonded junction and 100 °C/W thermal resistance sustain repeated surge events without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4119UR-1 | MIL-qualified variant with identical electrical specs; same DO-213AA package but JANTXV screened per MIL-PRF-19500/435 | Required for DoD procurement; includes additional environmental stress screening beyond CDLL4119 | Select 1N4119UR-1 when full MIL-STD-883 compliance and traceable lot documentation are mandated |
| BZX84-C27LT1G | 27 V ±5%, SOT-23 package, 150 Ω ZZT, 100 nA IR @ 20.5 V - lower voltage, plastic package, higher leakage | Suitable for commercial industrial controls; not hermetic or high-temp rated | Choose BZX84-C27LT1G only for cost-sensitive, non-military designs with <125°C ambient and no humidity exposure |
Compared with CDLL4119, 1N4119UR-1 offers identical performance with enhanced screening for mission-critical systems, while BZX84-C27LT1G trades hermetic reliability and temperature range for compact size and lower cost in benign environments.
Availability
CDLL4119 is available at Aetrix Electronics and suitable for aerospace power regulation, downhole instrumentation reference, and avionics sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CDLL4119 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 CDLL4099–CDLL4135 series was designed specifically for precision voltage reference and overvoltage protection in mil-aero applications where hermetic sealing, wide temperature operation, and MIL-PRF-19500 qualification are mandatory.
FAQ
What is the Zener voltage tolerance for CDLL4119?
The CDLL4119 has a nominal Zener voltage of 28 V with a tolerance of ±5%, as specified in Note 1 of the manufacturer's datasheet. This tolerance applies when measured at 25°C ambient with the device in thermal equilibrium. The CDLL4119 does not carry a "C" (±2%) or "D" (±1%) suffix, so the standard ±5% applies.
Is CDLL4119 suitable for surface-mount assembly?
Yes, CDLL4119 uses the DO-213AA (MELF/LL34) package, which is a leadless, cylindrical surface-mount configuration with metallized end caps. It is compatible with standard reflow soldering processes and designed for automated placement. The CDLL4119's glass body and tin/lead finish support reliable solder joint formation per J-STD-020 guidelines.
What is the maximum power dissipation for CDLL4119 at 125°C?
The CDLL4119 has a DC power dissipation rating of 500 mW at TEC = +125°C. Above this temperature, power must be derated linearly at 10 mW/°C. At 175°C, the allowable dissipation drops to zero. This thermal behavior is defined in the Maximum Ratings table and confirmed in Figure 2 (Power Derating Curve).
Does CDLL4119 meet any military specifications?
Yes, CDLL4119 complies with MIL-PRF-19500/435 for discrete semiconductor devices, covering electrical, environmental, and reliability requirements for Zener diodes. While CDLL4119 is the commercial-grade version, its construction, materials, and test methods align with that specification - verified by Microsemi's qualification reports and test data sheets.
How does the Zener impedance of CDLL4119 affect circuit stability?
The CDLL4119's maximum Zener impedance of 200 Ω at 250 µA means its output voltage varies by ≤50 mV for a 250 µA load step - critical for maintaining loop stability in precision feedback circuits. This low dynamic resistance directly improves regulation accuracy in voltage references and reduces noise coupling in analog signal chains using the CDLL4119.
CDLL4119 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 28 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21.3 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
CDLL4119 FAQ
1.How can I place an order for CDLL4119 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4119 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 CDLL4119 reliable?
The price and inventory of CDLL4119 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4119 is usually 5 days.
3.What payment methods are accepted for CDLL4119?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4119 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4119?
CDLL4119 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4119 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 CDLL4119?
For technical support, including CDLL4119 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4119 requirements.
6.How does Aetrix verify that CDLL4119 is sourced from the original manufacturer or authorized distributors?
All CDLL4119 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 CDLL4119 meets industry standards.
7.What is the process for return or replacement of CDLL4119?
All CDLL4119 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4119, 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 CDLL4119 part is unused and in its original packaging.
Return procedure for CDLL4119:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4119 Tags
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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
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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