CDLL4618/TR Equivalent & Substitute Parts

Part Overview

The CDLL4618/TR is an active Zener diode voltage regulator manufactured by Microchip Technology, designed for surface mount applications. This component functions as a 2.7 V Zener diode with 500 mW power dissipation capability in a DO-213AA package. The part is RoHS3 compliant and REACH unaffected, making it suitable for modern electronic applications requiring voltage regulation and protection circuits. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

CDLL4618/TR

Microchip TechnologyIn Stock: 1192CDLL4618/TR Datasheet

Current PartRFQ

1N4618UR/TR

Microchip TechnologyIn Stock: 11951N4618UR/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL4618/TR is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match the following criteria:

• Zener voltage (Vz) of 2.7 V nominal
• Tolerance of ±5%
• Maximum power dissipation of 500 mW
• Maximum impedance (Zzt) of 1500 Ohms
• Reverse leakage current of 500 nA @ 1 V
• Forward voltage (Vf) maximum of 1.1 V @ 200 mA
• Operating temperature range of -65°C to 175°C
• Surface mount mounting type
• DO-213AA package configuration

The substitute part 1N4618UR/TR meets all of these parameters and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the CDLL4618/TR and 1N4618UR/TR are active products from Microchip Technology with identical electrical specifications and mechanical packaging. Selection between these parts is based on inventory availability and supply chain requirements rather than technical performance differences.

The CDLL4618/TR is currently in stock with 1144 units available. The 1N4618UR/TR substitute is also in stock with 1088 units available. Both parts are RoHS3 compliant and REACH unaffected, meeting modern regulatory requirements for electronic component procurement.

For applications requiring the 2.7 V Zener diode voltage regulator in DO-213AA surface mount package with 500 mW power rating, either part number is functionally interchangeable. Selection should be based on procurement lead times, supplier availability, and cost considerations.

Frequently Asked Questions (FAQ)

Q: Can the 1N4618UR/TR be used as a direct replacement for the CDLL4618/TR?

A: Yes. The 1N4618UR/TR is a parametric equivalent with identical electrical specifications, tolerance, power rating, impedance, leakage current, forward voltage, operating temperature range, and DO-213AA package configuration. Both parts are manufactured by Microchip Technology and are active products.

Q: Are there any differences in the package or mounting between these parts?

A: No. Both parts use the DO-213AA surface mount package and are supplied in Tape & Reel (TR) format. They are mechanically and electrically interchangeable in PCB designs.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the acceptable variation in the nominal 2.7 V Zener voltage across the manufacturing range. This tolerance applies to both the CDLL4618/TR and 1N4618UR/TR, ensuring consistent voltage regulation performance in circuit applications.

Q: Do both parts meet current regulatory compliance standards?

A: The CDLL4618/TR is explicitly RoHS3 compliant and REACH unaffected. The 1N4618UR/TR compliance status is not specified in the provided data. For applications with strict regulatory requirements, the CDLL4618/TR documentation should be verified.

Q: What is the maximum power dissipation for these Zener diodes?

A: Both parts are rated for 500 mW maximum power dissipation. Circuit design must ensure that the power dissipated across the Zener diode does not exceed this rating during normal operation and worst-case conditions.

Q: Are these parts suitable for high-temperature applications?

A: Yes. Both parts operate across the temperature range of -65°C to 175°C, supporting applications requiring extended temperature performance. Circuit design must account for temperature-dependent variations in Zener voltage and leakage current.