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Microchip Technology CDLL4102
- Part No.:
- CDLL4102
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
CDLL4102.pdf
- Description:
- DIODE ZENER 8.7V 500MW DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,518
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Product details
Overview
CDLL4102 from Microsemi is a hermetically sealed, surface-mount silicon Zener diode in DO-213AA (MELF/LL34) package, rated for 8.7 V nominal Zener voltage at 250 µA test current, 200 Ω Zener impedance, and 44 mA maximum Zener current, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the CDLL4102 datasheet, CDLL4102 pinout, CDLL4102 application, or CDLL4102 equivalent, key selection criteria include Zener voltage tolerance (±5%), junction temperature range (–65°C to +175°C), thermal resistance (100 °C/W), low-leakage performance (1.0 µA at 6.61 V), and MELF package compatibility with automated reflow assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, relying on controlled reverse-biased Zener breakdown. Its metallurgically bonded construction ensures stable long-term voltage regulation under thermal cycling and high-reliability environments.
The DO-213AA glass MELF package provides hermetic sealing and axial coefficient of expansion (~6 ppm/°C), requiring matched PCB substrate selection. Electrical behavior is specified at 25°C ambient with thermal derating above +125°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V ±5% at IZT = 250 µA - defines stable regulation point for biasing or clamping |
| Zener Impedance (ZZT) | 200 Ω max - limits output voltage variation under load current changes |
| Reverse Leakage (IR) | 1.0 µA max at VR = 6.61 V - ensures minimal quiescent power loss in standby mode |
| Max Zener Current (IZM) | 44 mA - sets upper limit for continuous power dissipation (500 mW @ TEC = +125°C) |
| Junction Temp Range | –65°C to +175°C - enables operation in aerospace, downhole, or military-grade thermal environments |
| Package | DO-213AA (MELF/LL34) - surface-mount, hermetically sealed glass case with axial symmetry |
Pinout & Package
DO-213AA (MELF) package: cylindrical, leadless, hermetically sealed glass body with cathode band marking; no discrete pins - terminals are axial end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode (banded end) | Zener breakdown terminal | Connected to higher-potential node; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Prevents moisture ingress and parametric drift in harsh environments |
| Metallurgical bonding | Ensures mechanical robustness and thermal stability across wide temperature excursions |
| Low test current operation (250 µA) | Enables use in ultra-low-power sensor biasing and battery-backed circuits |
| Controlled Zener impedance (200 Ω) | Delivers predictable regulation accuracy under varying load conditions |
Applications
| Industrial Sensor Signal Conditioning | Aerospace Power Monitor Reference |
|---|---|
Use Scenario: Providing stable 8.7 V reference for bridge amplifier offset nulling and ADC input scaling in pressure transducers. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing known bias point for analog front-end circuitry. Use Value: Maintains calibration integrity over –55°C to +125°C operating range with <±5% voltage drift. | Use Scenario: Clamping bus voltage during transient surges in avionics power distribution units. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing energy above 8.7 V threshold without latch-up. Use Value: Limits fault voltage to safe level while sustaining 44 mA peak current per MIL-PRF-19500/435 requirements. |
| Military Radio RF Stage Biasing | Downhole Oilfield Instrumentation |
Use Scenario: Setting gate bias for GaAs FET amplifiers in HF/VHF transceivers exposed to thermal shock. IC Role / Device Role / Timing Role: Low-noise DC bias source with minimal leakage-induced drift. Use Value: Delivers 1.0 µA max reverse leakage at 6.61 V, preserving amplifier linearity and gain stability. | Use Scenario: Regulating supply to MEMS accelerometers in geothermal probe modules operating at 175°C. IC Role / Device Role / Timing Role: High-temperature-stable shunt regulator maintaining reference accuracy beyond standard commercial limits. Use Value: Functions continuously up to +175°C junction temperature with no parameter degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4102UR-1 | Same Zener voltage (8.7 V), identical DO-213AA package, but qualified to MIL-PRF-19500/435 Class JANTXV | Required for defense/aerospace programs mandating military screening and traceability | Select when full MIL-spec compliance and extended reliability testing are contractually required |
| BZX84-C8V2 | Lower Zener voltage (8.2 V), SOT-23 package, ±5% tolerance, 150 Ω ZZT, not hermetically sealed | Suitable only for commercial-grade, non-hermetic, PCB-space-constrained designs | Choose only for cost-sensitive, non-mission-critical applications where thermal and humidity robustness are secondary |
Compared with CDLL4102, 1N4102UR-1 offers enhanced screening for mission-critical systems, while BZX84-C8V2 trades hermeticity and temperature range for compact size and lower cost-neither is pin-compatible due to differing packages and voltage grades.
Availability
CDLL4102 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, aerospace power monitor reference, military radio RF stage biasing, and downhole oilfield instrumentation requiring stable component supply across extended temperature and reliability requirements.
Supply support for CDLL4102 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 high-temperature analog and mixed-signal components.
The CDLL series was designed specifically for military, aerospace, and industrial applications demanding hermetic packaging, wide-temperature operation, and long-term parametric stability in Zener reference diodes.
FAQ
What is the Zener voltage tolerance for CDLL4102?
The CDLL4102 has a nominal Zener voltage of 8.7 V with a tolerance of ±5%, measured at 250 µA test current and 25°C ambient temperature. This tolerance is inherent to the base CDI type designation; tighter tolerances (e.g., ±2% or ±1%) require suffixes "C" or "D", which do not apply to the standard CDLL4102 part number.
Is CDLL4102 suitable for surface-mount reflow assembly?
Yes, CDLL4102 is packaged in DO-213AA (MELF/LL34), a leadless, cylindrical glass case explicitly rated for surface-mount reflow soldering. Its hermetic construction and axial symmetry allow reliable placement and solder joint formation using standard SnPb or Pb-free reflow profiles, provided thermal mass and ramp rates comply with Microsemi's recommended guidelines.
What is the maximum power dissipation for CDLL4102 at +125°C case temperature?
CDLL4102 has a DC power dissipation rating of 500 mW at TEC = +125°C. Above this temperature, power must be linearly derated at 10 mW/°C - for example, at +150°C case temperature, maximum allowable dissipation drops to 475 mW. This derating ensures junction temperature remains within the –65°C to +175°C operational limit.
Does CDLL4102 have a defined polarity marking, and how is it oriented in circuit?
Yes, CDLL4102 features a visible cathode band on one axial end of the glass MELF body. The banded end is the cathode and must be connected to the higher-potential node in reverse-bias Zener operation. The unbanded end is the anode and connects to the lower-potential node - correct orientation is essential to achieve 8.7 V regulation rather than forward conduction.
Can CDLL4102 replace CDLL4101 in a design requiring 8.2 V regulation?
No, CDLL4102 cannot directly replace CDLL4101 because it is rated for 8.7 V nominal Zener voltage versus CDLL4101's 8.2 V. Substituting CDLL4102 would shift the regulation point by +0.5 V, potentially violating downstream voltage margin requirements. For 8.2 V regulation, CDLL4101 or its MIL-spec counterpart 1N4101UR-1 remains the appropriate selection.
CDLL4102 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6.7 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
CDLL4102 FAQ
1.How can I place an order for CDLL4102 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4102 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 CDLL4102 reliable?
The price and inventory of CDLL4102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4102 is usually 5 days.
3.What payment methods are accepted for CDLL4102?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4102 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4102?
CDLL4102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4102 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 CDLL4102?
For technical support, including CDLL4102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4102 requirements.
6.How does Aetrix verify that CDLL4102 is sourced from the original manufacturer or authorized distributors?
All CDLL4102 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 CDLL4102 meets industry standards.
7.What is the process for return or replacement of CDLL4102?
All CDLL4102 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4102, 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 CDLL4102 part is unused and in its original packaging.
Return procedure for CDLL4102:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4102 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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onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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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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