Equivalent & Substitute Parts Reference: CDLL4774A

Part Overview

CDLL4774A is a Zener diode manufactured by Microchip Technology, categorized under Diodes, Zener. The device features a nominal Zener voltage of 9.1 V, maximum power dissipation of 500 mW, and a ±5% voltage tolerance. Its construction is surface mount, packaged in a DO-213AA case. As an active product with available inventory, there are scenarios where identification of parametric substitutes is required, such as cross-referencing for military qualification or meeting specific compliance requirements. Alternative Zener diodes are necessary to maintain design continuity and supply chain flexibility, particularly when certain certifications or product grades are mandatory.

Key Parameters

Manufacturer Part Number	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	REACH Status	Product Status	Base Product Number
CDLL4774A	9.1 V	±5%	500 mW	200 Ohms	10 µA @ 6 V	-65°C ~ 175°C	Surface Mount	DO-213AA	DO-213AA	RoHS non-compliant	REACH Unaffected	Active	CDLL4774
JANTX1N4103UR-1	9.1 V	±5%	500 mW	200 Ohms	500 nA @ 7 V	-65°C ~ 175°C	Surface Mount	DO-213AA	DO-213AA	RoHS non-compliant	REACH Unaffected	Active	1N4103

Substitute Part Grouping Explanation

Substitution is determined by direct comparison of electrical and mechanical parameters within the Diodes, Zener category. Key parameters for substitution include: Zener voltage (Vz), voltage tolerance, maximum power dissipation, maximum impedance (Zzt), reverse leakage current, operating temperature range, mounting type, and package/case specification. Only parts matching these attributes can be considered parameteric equivalents, ensuring compatibility in existing circuits and assemblies.

Parameter Comparison

Manufacturer Part Number	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	REACH Status	Product Status
CDLL4774A	9.1 V	±5%	500 mW	200 Ohms	10 µA @ 6 V	-65°C ~ 175°C	Surface Mount	DO-213AA	DO-213AA	RoHS non-compliant	REACH Unaffected	Active
JANTX1N4103UR-1	9.1 V	±5%	500 mW	200 Ohms	500 nA @ 7 V	-65°C ~ 175°C	Surface Mount	DO-213AA	DO-213AA	RoHS non-compliant	REACH Unaffected	Active

Engineering Selection Recommendations

Selection between CDLL4774A and JANTX1N4103UR-1 should be based on matching product status (active), package specifications (DO-213AA), and regulatory compliance (RoHS non-compliant, REACH unaffected). Certifications, such as military qualification noted in the JANTX1N4103UR-1, may be required for certain applications. Product grade and qualification must be considered according to application and system requirements.

Frequently Asked Questions (FAQ)

Q1. What parameters are critical when substituting Zener diodes within the same category?
Key substitution parameters are Zener voltage, voltage tolerance, maximum power, impedance, reverse leakage current, mounting type, package/case, operating temperature, product status, and compliance characteristics.

Q2. Is package/case compatibility required for substitution?
Yes. Both CDLL4774A and JANTX1N4103UR-1 use the DO-213AA package, allowing direct replacement in surface mount applications.

Q3. How does compliance affect part selection?
Both parts are RoHS non-compliant and REACH unaffected. Compliance should be reviewed to ensure suitability for the target environment or regulatory landscape.

Q4. Can military-qualified components replace commercial grade Zener diodes?
A military-qualified part such as JANTX1N4103UR-1 can be substituted where qualification is required, provided all key parameters match.

Q5. Is there a difference in electrical performance regarding reverse leakage current?
Parameters differ in reverse leakage current and test voltage. Ensure these attributes meet the requirements of the specific design or application.

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