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Microchip Technology CDLL4130
- Part No.:
- CDLL4130
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4130.pdf
- Description:
- DIODE ZENER 68V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,450
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Product details
Overview
CDLL4130 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 68 V nominal Zener voltage at 250 µA test current, 700 Ω Zener impedance, and 5.6 mA maximum Zener current, used for precision voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the CDLL4130 datasheet, CDLL4130 pinout, CDLL4130 application, or CDLL4130 equivalent, key selection factors include its ±5% Zener tolerance, -65°C to +175°C junction temperature range, 500 mW power dissipation at 125°C, low-leakage performance (<0.01 µA at 51.68 V), and MIL-PRF-19500/435 qualification for high-reliability environments.
Technical Context
The CDLL4130 operates as a two-terminal voltage reference device with metallurgically bonded construction and axial coefficient of expansion matched to ceramic substrates. Its Zener breakdown mechanism delivers stable regulation under low-current conditions (250 µA IZT) and maintains defined impedance (700 Ω) across thermal extremes.
Designed for hermetic reliability, it features glass-sealed DO-213AA packaging, tin/lead lead finish, and thermal resistance of 100 °C/W at L = 0 inch. Polarity is cathode-band positive, requiring correct orientation in series-shunt regulation topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 68 V ±5% at 250 µA - defines regulated output voltage in precision reference circuits |
| Zener Impedance | 700 Ω max at 250 µA - determines load regulation sensitivity and ripple rejection |
| Max Reverse Leakage | 0.01 µA at 51.68 V - ensures minimal quiescent current in battery-backed or low-power hold-up designs |
| Power Dissipation | 500 mW @ TEC = +125°C - sets thermal derating limit for PCB layout and heatsinking |
| Junction Temp Range | -65°C to +175°C - enables operation in extended-temperature aerospace and downhole applications |
| Package | DO-213AA (MELF/LL34) - provides hermetic sealing and high-reliability surface-mount compatibility |
Pinout & Package
DO-213AA (MELF/LL34) hermetically sealed glass package with axial leads; cathode identified by band; no discrete pins - functions as a two-terminal device with polarity-dependent mounting orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; grounded node in shunt regulator | Connected to system ground or low-impedance return path in voltage reference configurations |
| Cathode | Current exit terminal during forward bias; regulated output node in shunt regulator | Banded end must be held at higher potential than anode to maintain Zener conduction and regulation |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 Qualified | Meets military screening requirements for radiation hardness, burn-in, and lot traceability in space-grade systems |
| Hermetic Glass Sealing | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Low Operating Current | Stable regulation at 250 µA enables use in ultra-low-power sensor biasing and standby reference circuits |
| Thermal Expansion Match | +6 ppm/°C axial COE minimizes mechanical stress when mounted on alumina or beryllia substrates |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Monitoring 28 V primary bus voltage in flight control computers with analog-to-digital conversion. IC Role / Device Role / Timing Role: Shunt-connected Zener reference providing stable 68 V scaling input to ADC front-end. Use Value: Enables accurate bus overvoltage detection within ±5% tolerance across -65°C to +175°C operating range. | Use Scenario: Generating a stable reference for telemetry voltage calibration in LEO satellite power management units. IC Role / Device Role / Timing Role: Precision voltage clamp in feedback loop of isolated DC-DC converter secondary side. Use Value: Maintains <0.01 µA leakage at 51.68 V reverse bias, minimizing error in low-current calibration paths. |
| Downhole Instrumentation | Aerospace ECU Protection |
Use Scenario: Voltage clamping in high-temperature logging tools deployed at 175°C wellbore environments. IC Role / Device Role / Timing Role: Overvoltage protection element across sensor supply rails subjected to transient spikes. Use Value: Sustains 500 mW dissipation at 125°C end-cap temperature with 10 mW/°C derating above that point. | Use Scenario: Regulating auxiliary 68 V rail for actuator driver ICs in fly-by-wire electronic control units. IC Role / Device Role / Timing Role: Series-shunt reference source feeding voltage-controlled oscillator bias networks. Use Value: Delivers 700 Ω Zener impedance at 250 µA, ensuring stable frequency setpoint under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4135UR-1 | Same 100 V nominal Zener voltage; identical DO-213AA package and MIL-PRF-19500/435 qualification | Higher voltage rating suits 72 V bus monitoring vs. CDLL4130's 68 V target | Select when system requires tighter margin above 68 V nominal or needs legacy UR-series part numbering |
| CDLL4129 | 62 V nominal Zener voltage; same 250 µA IZT, 0.01 µA leakage, and DO-213AA package | Lower regulation point fits 56–60 V intermediate rails in multi-rail avionics power systems | Choose for reduced voltage headroom where 62 V regulation meets design margin requirements |
Compared with CDLL4130, 1N4135UR-1 offers higher voltage headroom but identical reliability and thermal specs, while CDLL4129 provides a lower-voltage alternative with matching low-leakage and hermetic construction-both require board-level validation for exact circuit fit.
Availability
CDLL4130 is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, and downhole instrumentation requiring stable component supply with full MIL-PRF-19500/435 traceability.
Supply support for CDLL4130 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, radiation-tolerant, and aerospace-grade components.
The CDLL4130 belongs to Microsemi's legacy CDLL Zener diode family, designed specifically for military and space applications demanding hermetic sealing, extended temperature operation, and MIL-PRF-19500 compliance.
FAQ
What is the Zener voltage tolerance for CDLL4130?
The CDLL4130 has a nominal Zener voltage of 68 V with a tolerance of ±5%, measured at 250 µA test current and 25°C ambient temperature. A "C" suffix would indicate ±2% tolerance and "D" suffix ±1%, but CDLL4130 carries no such suffix and therefore adheres strictly to the ±5% specification per Note 1 in the official datasheet.
Is CDLL4130 suitable for surface-mount assembly?
Yes, CDLL4130 is packaged in DO-213AA (MELF/LL34) format, a leadless, cylindrical surface-mount package with metallurgically bonded construction. It supports reflow soldering and is qualified for automated placement in high-reliability PCB assembly lines meeting MIL-PRF-19500/435 process controls.
What is the maximum reverse leakage current for CDLL4130?
The maximum reverse leakage current for CDLL4130 is 0.01 µA at 51.68 V reverse voltage, as specified in the Electrical Characteristics table. This ultra-low leakage supports precision reference stability in low-power and high-impedance sensing circuits where parasitic current paths must be minimized.
Does CDLL4130 require heatsinking in standard operation?
CDLL4130 does not require external heatsinking under typical 500 mW dissipation at TEC = +125°C, thanks to its 100 °C/W thermal resistance at L = 0 inch. However, PCB copper area and substrate material must be selected to match its +6 ppm/°C axial coefficient of expansion to avoid mechanical stress-induced failure.
How does CDLL4130 differ from commercial-grade Zener diodes?
CDLL4130 differs from commercial Zeners through MIL-PRF-19500/435 qualification, hermetic glass sealing, extended -65°C to +175°C junction temperature range, and rigorous lot traceability. These attributes ensure long-term parameter stability and radiation resilience absent in non-qualified counterparts, making CDLL4130 appropriate for mission-critical aerospace deployments.
CDLL4130 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 700 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 51.7 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
CDLL4130 FAQ
1.How can I place an order for CDLL4130 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4130 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 CDLL4130 reliable?
The price and inventory of CDLL4130 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4130 is usually 5 days.
3.What payment methods are accepted for CDLL4130?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4130 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4130?
CDLL4130 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4130 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 CDLL4130?
For technical support, including CDLL4130 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4130 requirements.
6.How does Aetrix verify that CDLL4130 is sourced from the original manufacturer or authorized distributors?
All CDLL4130 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 CDLL4130 meets industry standards.
7.What is the process for return or replacement of CDLL4130?
All CDLL4130 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4130, 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 CDLL4130 part is unused and in its original packaging.
Return procedure for CDLL4130:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4130 Tags
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