CDLL5519E3/TR Equivalent & Substitute Parts

Part Overview

The CDLL5519E3/TR is a Zener diode voltage regulator manufactured by Microchip Technology, classified as a surface mount component in the DO-213AA package. This device is designed for voltage regulation applications requiring a nominal Zener voltage of 3.6 V with 500 mW power dissipation capability. The part maintains Active product status and is suitable for applications across the industrial temperature range of -65°C to 175°C. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for designs utilizing this voltage regulation topology.

Substiute Parts

CDLL5519E3/TR

Microchip TechnologyIn Stock: 1145CDLL5519E3/TR Datasheet

Current PartRFQ

1N5519CUR-1/TR

Microchip TechnologyIn Stock: 9391N5519CUR-1/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL5519E3/TR is determined by equivalence across the following critical electrical and mechanical parameters:

• Nominal Zener Voltage (Vz): 3.6 V (primary functional requirement)
• Maximum Power Dissipation: 500 mW (thermal design constraint)
• Package Type: DO-213AA (mechanical and thermal interface requirement)
• Mounting Configuration: Surface Mount (assembly process compatibility)
• Operating Temperature Range: -65°C to 175°C (environmental specification)
• Impedance (Zzt): 24 Ohms maximum (dynamic regulation characteristic)
• Forward Voltage (Vf): 1.1 V @ 200 mA (conduction characteristic)

The substitute part 1N5519CUR-1/TR meets all critical electrical parameters and maintains identical package and mounting specifications. The primary distinction is the tolerance specification, where the substitute provides ±2% tolerance compared to the main part's ±20% tolerance. This represents an improvement in voltage regulation precision and does not restrict substitution in applications designed for the main part's tolerance band.

Parameter Comparison

Engineering Selection Recommendations

Both the CDLL5519E3/TR and 1N5519CUR-1/TR are Active products manufactured by Microchip Technology with identical export classification (EAR99) and tariff codes (HTSUS 8541.10.0050). Both components are REACH compliant and suitable for direct substitution in voltage regulation circuits.

The 1N5519CUR-1/TR substitute part provides enhanced voltage tolerance specification (±2% versus ±20%), which delivers superior regulation accuracy without compromising any electrical or thermal performance characteristics. This tolerance improvement is compatible with all applications designed for the main part and provides additional margin for precision voltage regulation requirements.

Selection between these parts should be based on procurement availability, lead time requirements, and inventory status. Both parts are functionally equivalent for the specified application parameters.

Frequently Asked Questions (FAQ)

Q: Can the 1N5519CUR-1/TR be used as a direct replacement for the CDLL5519E3/TR?

A: Yes. The 1N5519CUR-1/TR is a direct substitute. Both parts share identical nominal Zener voltage (3.6 V), maximum power dissipation (500 mW), package type (DO-213AA), mounting configuration (Surface Mount), and operating temperature range (-65°C to 175°C). The substitute part provides superior voltage tolerance (±2% versus ±20%), which does not restrict substitution in applications designed for the main part.

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

A: No. Both the CDLL5519E3/TR and 1N5519CUR-1/TR utilize the DO-213AA package in Surface Mount configuration with Tape & Reel (TR) packaging. Assembly processes, PCB footprints, and thermal management requirements are identical.

Q: What is the significance of the tolerance difference between ±20% and ±2%?

A: Tolerance specification defines the allowable deviation of the nominal Zener voltage from the specified 3.6 V value. The ±2% tolerance of the 1N5519CUR-1/TR provides tighter voltage regulation accuracy compared to the ±20% tolerance of the CDLL5519E3/TR. Applications requiring higher precision voltage regulation benefit from the substitute part's improved tolerance specification.

Q: Are both parts suitable for the full operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -65°C to 175°C (TJ), ensuring consistent performance across industrial and extended temperature applications.

Q: What compliance certifications apply to both parts?

A: Both parts carry identical export classification (ECCN EAR99) and tariff code (HTSUS 8541.10.0050). Both are REACH compliant. These certifications ensure equivalent regulatory and compliance status for procurement and supply chain purposes.