Equivalent & Substitute Parts for CDLL751

Part Overview

The CDLL751 is a Zener diode manufactured by Microchip Technology, primarily used for voltage regulation and surge suppression in electronic circuits. This diode features a 5.1 V nominal Zener voltage, 500 mW maximum power dissipation, and is supplied in a surface-mount DO-213AB (MELF) package. The product is currently active, but end-users may require alternative model information for reasons such as inventory management, procurement constraints, or lifecycle planning.

Substiute Parts

CDLL751

Microchip TechnologyIn Stock: 1173CDLL751 Datasheet

Current PartRFQ

CDLL751A

Microchip TechnologyIn Stock: 2056CDLL751A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is based strictly on the following parameters: manufacturer, Zener voltage (nominal), tolerance, maximum power dissipation, maximum impedance (Zzt), maximum reverse leakage current, maximum forward voltage at stated current, operating temperature range, mounting type, and package/case. Compliance statuses, including RoHS and REACH, are also considered. Substitute parts meet or exceed all specified critical electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both CDLL751 and CDLL751A are active, RoHS non-compliant, and REACH unaffected. The critical distinction is the tighter tolerance on the substitute part CDLL751A (±5%). All other electrical and mechanical parameters are identical. Selection between these options can be made based strictly on part availability, compliance requirements, and inventory status, adhering to project documentation and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: What determines if CDLL751A is a substitute for CDLL751?
A: CDLL751A matches CDLL751 in nominal Zener voltage, power dissipation, impedance, reverse leakage, forward voltage, operating temperature, mounting type, and package. The only difference is the tighter tolerance (±5% vs. ±10%).

Q: Are the package and dimensions of CDLL751A compatible with CDLL751?
A: Both parts use the DO-213AB (MELF) surface-mount package and are mechanically interchangeable.

Q: Do RoHS or REACH differences affect substitution?
A: Both CDLL751 and CDLL751A are RoHS non-compliant and REACH unaffected, ensuring identical status for environmental compliance.

Q: Does the reduced tolerance on CDLL751A pose any design concerns?
A: Tolerance is tighter (±5% vs. ±10%); all other parameters remain unchanged. Selection can be based on project-specific documentation and specification allowances.

Q: Can inventory availability affect the decision to substitute?
A: Inventory must be managed according to project needs and procurement cycles. Both parts are active and available in bulk packaging.

Q: Do both items have the same moisture sensitivity?
A: Both have an MSL rating of 1 (Unlimited), enabling identical handling and storage requirements.