CDLL4744AE3/TR Equivalent & Substitute Parts

Part Overview

The CDLL4744AE3/TR is a Zener diode voltage regulator manufactured by Microchip Technology, classified as a surface mount component in the DO-213AB (MELF) package. This 15 V, 1 W Zener diode is designed for voltage regulation and protection applications requiring stable reference voltage generation. The part maintains Active product status with 794 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

CDLL4744AE3/TR

Microchip TechnologyIn Stock: 890CDLL4744AE3/TR Datasheet

Current PartRFQ

1N4744AUR/TR

Microchip TechnologyIn Stock: 9291N4744AUR/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL4744AE3/TR is determined by strict equivalence across the following critical parameters:

• Zener Voltage (Nominal): 15 V
• Voltage Tolerance: ±5%
• Maximum Power Dissipation: 1 W
• Maximum Impedance: 14 Ohms
• Forward Voltage: 1.2 V @ 200 mA
• Operating Temperature Range: -65°C to 175°C
• Package Type: DO-213AB (MELF, Glass)
• Mounting Configuration: Surface Mount
• Packaging Format: Tape & Reel (TR)

The substitute part 1N4744AUR/TR meets all specified electrical and mechanical parameters, ensuring functional and physical compatibility in applications requiring the CDLL4744AE3/TR. Both parts are manufactured by Microchip Technology and maintain identical nominal specifications across voltage regulation, power handling, and thermal operating ranges.

Parameter Comparison

Engineering Selection Recommendations

Both CDLL4744AE3/TR and 1N4744AUR/TR are Active products manufactured by Microchip Technology and carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, confirming regulatory and compliance equivalence.

The primary distinction between these parts is the reverse leakage current specification. The CDLL4744AE3/TR specifies 100 nA @ 11.4 V, while the 1N4744AUR/TR specifies 5 µA @ 11.4 V. This difference does not affect substitution eligibility for standard voltage regulation applications. The 1N4744AUR/TR maintains higher inventory availability (888 units in stock versus 794 units), supporting supply chain optimization.

Selection between these parts should be based on application-specific leakage current requirements. Applications with stringent leakage specifications should retain the CDLL4744AE3/TR. Applications tolerant of higher reverse leakage current can utilize the 1N4744AUR/TR without functional degradation.

Frequently Asked Questions (FAQ)

Q: Can the 1N4744AUR/TR be used as a direct replacement for the CDLL4744AE3/TR?

A: Yes. Both parts are parametrically equivalent across all critical electrical specifications: 15 V nominal Zener voltage, ±5% tolerance, 1 W maximum power dissipation, 14 Ohms maximum impedance, and identical operating temperature range (-65°C to 175°C). Both use the DO-213AB (MELF) surface mount package in Tape & Reel format.

Q: What is the difference in reverse leakage current between these parts?

A: The CDLL4744AE3/TR specifies 100 nA reverse leakage at 11.4 V, while the 1N4744AUR/TR specifies 5 µA at the same voltage. This 50-fold difference reflects manufacturing process variations within Microchip Technology's product line. For applications requiring minimal leakage, the CDLL4744AE3/TR is the appropriate selection.

Q: Are both parts available in the same packaging format?

A: Yes. Both the CDLL4744AE3/TR and 1N4744AUR/TR are supplied in Tape & Reel (TR) format with DO-213AB (MELF, Glass) package configuration, ensuring compatibility with automated assembly equipment and identical handling requirements.

Q: What is the product status of these parts?

A: Both parts maintain Active product status with Microchip Technology, confirming ongoing manufacturing support and availability for new designs and production orders.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, confirming equivalent regulatory and export compliance status.