CDLL4622/TR Equivalent & Substitute Parts

Part Overview

The CDLL4622/TR is an active Zener diode voltage regulator manufactured by Microchip Technology, designed for surface mount applications. This component functions as a voltage reference and regulation element in electronic circuits requiring stable 3.9 V output. The part is classified as a Zener diode in the DO-213AA package and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same functional category, ensuring direct interchangeability in circuit designs without modification to PCB layouts or supporting circuitry.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.9	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	1650	Ohms
Current - Reverse Leakage @ Vr	2.5	µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CDLL4622/TR is determined by strict equivalence across the following critical parameters:

Nominal Zener Voltage: 3.9 V (exact match required)
Voltage Tolerance: ±5% (identical specification)
Maximum Power Dissipation: 500 mW (equal or greater rating)
Dynamic Impedance: 1650 Ohms maximum (equal or lower value)
Reverse Leakage Current: 2.5 µA @ 2 V (equal or lower specification)
Forward Voltage: 1.1 V maximum @ 200 mA (equal or lower value)
Operating Temperature Range: -65°C to 175°C (equal or wider range)
Package Type: DO-213AA surface mount (identical mechanical form factor)
Regulatory Compliance: RoHS3 compliant (maintained across substitutes)

The substitute part 1N4622UR/TR meets all electrical and mechanical parameters specified for the CDLL4622/TR, enabling direct replacement in circuit applications.

Parameter Comparison

Parameter	CDLL4622/TR	1N4622UR/TR	Match Status
Manufacturer	Microchip Technology	Microchip Technology	Identical
Category	Diodes, Zener	Diodes, Zener	Identical
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Identical
Voltage - Zener (Nom)	3.9 V	3.9 V	Identical
Tolerance	±5%	±5%	Identical
Power - Max	500 mW	500 mW	Identical
Impedance (Max)	1650 Ohms	1650 Ohms	Identical
Current - Reverse Leakage @ Vr	2.5 µA @ 2 V	2.5 µA @ 2 V	Identical
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.1 V @ 200 mA	Identical
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	DO-213AA	DO-213AA	Identical
Product Status	Active	Active	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8541.10.0050	8541.10.0050	Identical

Engineering Selection Recommendations

Both the CDLL4622/TR and 1N4622UR/TR are active products manufactured by Microchip Technology with identical electrical specifications and mechanical packaging. Selection between these parts is based on inventory availability and supply chain considerations rather than technical performance differences.

The CDLL4622/TR maintains 815 units in stock, while the 1N4622UR/TR has 961 units available. Both components are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

The 1N4622UR/TR includes documented Moisture Sensitivity Level (MSL) classification of 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling. This specification is not provided for the CDLL4622/TR in the available documentation.

Frequently Asked Questions (FAQ)

Q: Can the 1N4622UR/TR replace the CDLL4622/TR in existing circuit designs?

A: Yes. The 1N4622UR/TR is a parametric equivalent with identical electrical characteristics (3.9 V nominal Zener voltage, 500 mW power rating, ±5% tolerance) and identical mechanical packaging (DO-213AA surface mount). No circuit modifications or PCB layout changes are required.

Q: Are there differences in the physical package between these parts?

A: No. Both parts use the DO-213AA surface mount package, ensuring identical PCB footprints and mounting procedures.

Q: What is the significance of the MSL rating on the 1N4622UR/TR?

A: The MSL 1 (Unlimited) classification on the 1N4622UR/TR indicates the component has no moisture sensitivity limitations. This simplifies storage and handling procedures compared to components with higher MSL ratings.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the CDLL4622/TR and 1N4622UR/TR are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching: nominal Zener voltage (3.9 V), voltage tolerance (±5%), maximum power dissipation (500 mW), dynamic impedance (1650 Ohms maximum), reverse leakage current (2.5 µA @ 2 V), forward voltage (1.1 V @ 200 mA), and operating temperature range (-65°C to 175°C).

Q: Are there any differences in the tape and reel packaging specifications?

A: Both parts are supplied in Tape & Reel (TR) format. No differences in packaging specifications are documented in the provided parameters.

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