CDLL4770 Equivalent & Substitute Parts Reference

Part Overview

The CDLL4770 is a Zener diode manufactured by Microchip Technology, classified in the Diodes, Zener category. This part features a nominal Zener voltage of 9.1 V, a maximum power rating of 500 mW, ±5% voltage tolerance, and a maximum zener impedance of 200 Ohms in a surface mount DO-213AA package. The product is currently active and is offered as RoHS non-compliant. Alternative models are sought to address requirements such as availability, sourcing flexibility, and extended qualification options.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	RoHS Status	REACH Status	Product Status
CDLL4770	Microchip Technology	Diodes, Zener	9.1 V	±5%	500 mW	200 Ohms	10 µA @ 6 V	-65°C ~ 175°C	Surface Mount	DO-213AA	RoHS non-compliant	REACH Unaffected	Active

Substitute Part Grouping Explanation

Substitution is determined strictly by matching key electrical and mechanical parameters, including nominal Zener voltage, tolerance, maximum power rating, maximum Zener impedance, leakage current at specified test voltage, operating temperature range, mounting type, and package or case compatibility. Only parts meeting all these explicit criteria are considered valid substitutes for the CDLL4770.

Parameter Comparison

Parameter	CDLL4770	JANTX1N4103UR-1
Manufacturer	Microchip Technology	Microchip Technology
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	9.1 V	9.1 V
Tolerance	±5%	±5%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	200 Ohms	200 Ohms
Current - Reverse Leakage @ Vr	10 µA @ 6 V	500 nA @ 7 V
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AA	DO-213AA
RoHS Status	RoHS non-compliant	RoHS non-compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

The CDLL4770 and JANTX1N4103UR-1 Zener diodes are both active status and produced by Microchip Technology. Both are classified as RoHS non-compliant and REACH unaffected. JANTX1N4103UR-1 includes military-grade qualification (MIL-PRF-19500/435). Selection between these parts can be based on inventory availability, compliance requirements, and qualification status as provided.

Frequently Asked Questions (FAQ)

Q1: What are the key criteria when selecting a substitute for the CDLL4770 Zener diode?
A1: Substitutes must match the Zener voltage, tolerance, power rating, maximum impedance, reverse leakage parameters, case/package, mounting type, and operating temperature range.

Q2: Are the CDLL4770 and JANTX1N4103UR-1 mechanically compatible?
A2: Both parts are specified in a surface mount DO-213AA package and are mechanically compatible.

Q3: Is there a difference in RoHS compliance or environmental status?
A3: Both the CDLL4770 and JANTX1N4103UR-1 are RoHS non-compliant and REACH unaffected.

Q4: Does the military-grade qualification of JANTX1N4103UR-1 affect substitution?
A4: Military-grade qualification is an additional property of JANTX1N4103UR-1, as provided in the input parameters.

Q5: Are there significant differences in reverse leakage current between these parts?
A5: The CDLL4770 specifies 10 µA @ 6 V, while the JANTX1N4103UR-1 specifies 500 nA @ 7 V.

Q6: Can these parts be used interchangeably in designs requiring surface mount DO-213AA diodes?
A6: Both parts are identified with a surface mount DO-213AA package and have matched electrical and thermal parameters as provided.

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