Equivalent & Substitute Parts for CDLL5538B

Part Overview

The CDLL5538B is a Zener diode from Microchip Technology, categorized under Diodes, Zener, with a nominal Zener voltage of 18 V, maximum power dissipation of 500 mW, and a surface-mount DO-213AB (MELF) package. The product is currently active. Substituting the CDLL5538B is required for ensuring supply chain continuity, managing inventory, and accommodating design requirements while maintaining identical electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	18 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max) (Zzt)	100 Ohms
Current - Reverse Leakage @ Vr	10 nA @ 16.2 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	DO-213AB, MELF
Supplier Device Package	DO-213AB
RoHS Status	RoHS non-compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts for the CDLL5538B are grouped strictly according to electrical and mechanical parameters, including Zener voltage, power rating, tolerance, maximum impedance, reverse leakage current, forward voltage, operating temperature range, mounting type, package, RoHS status, MSL, REACH status, ECCN, and HTSUS code. Only parts matching these parameters are included as valid substitutes.

Parameter Comparison

Parameter	CDLL5538B	CDLL4112
Manufacturer	Microchip Technology	Microchip Technology
Voltage - Zener (Nom) (Vz)	18 V	18 V
Tolerance	±5%	±5%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	100 Ohms	100 Ohms
Current - Reverse Leakage @ Vr	10 nA @ 16.2 V	50 nA @ 13.7 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AB, MELF	DO-213AB, MELF
Supplier Device Package	DO-213AB	DO-213AB
RoHS Status	RoHS non-compliant	RoHS non-compliant
MSL	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

Both CDLL5538B and CDLL4112 are active products from Microchip Technology, share identical package and compliance characteristics (RoHS non-compliant, REACH unaffected, MSL 1, ECCN EAR99, HTSUS 8541.10.0050), and belong to the same category of surface-mount Zener diodes in the DO-213AB (MELF) package.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters for substituting a Zener diode like CDLL5538B?
A1: Key parameters include Zener voltage (Vz), power rating, tolerance, maximum impedance, reverse leakage current, forward voltage at a given current, operating temperature range, package type, mounting method, RoHS status, MSL, REACH status, ECCN, and HTSUS code.

Q2: Are CDLL5538B and CDLL4112 mechanically compatible?
A2: Yes. Both parts use the DO-213AB (MELF) surface-mount package.

Q3: What is the significance of RoHS non-compliance in the selection?
A3: Both parts are RoHS non-compliant; selection does not affect environmental or regulatory compliance status for restricted substances.

Q4: Is there any difference in product status or environmental certifications between these models?
A4: Both CDLL5538B and CDLL4112 are listed as active products and classified as REACH unaffected.

Q5: Can these substitutes be directly interchanged in BOM or manufacturing without changes?
A5: Both parts conform to the specified electrical and mechanical parameters; only fields provided in the input are considered for equivalence.

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