CDLL5538D/TR Equivalent & Substitute Parts Reference

Part Overview

The CDLL5538D/TR by Microchip Technology is a surface-mount Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18 V, maximum power dissipation of 500 mW, ±1% tolerance, and is packaged in the DO-213AA (Tape & Reel). The product is active. Evaluating alternative models is necessary for inventory management, dual sourcing, and in cases of supply fluctuation, provided substitutes match all key parametric and mechanical constraints.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	18 V
Tolerance	±1%
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 (TJ)
Mounting Type	Surface Mount
Package / Case	DO-213AA
Supplier Device Package	DO-213AA
Product Status	Active
Packaging	Tape & Reel (TR)
ECCN	EAR99
HTSUS	8541.10.0050
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

The substitute part, 1N4112DUR-1/TR, is grouped as a parametric equivalent to CDLL5538D/TR. Substitution is strictly based on equivalence in the following key parameters:

Voltage - Zener (Nom) (Vz)
Tolerance
Power - Max
Impedance (Max) (Zzt)
Voltage - Forward (Vf) (Max) @ If
Operating Temperature
Mounting Type
Package / Case
Product Status

Only parts meeting these specified electrical and mechanical characteristics are listed as substitutes.

Parameter Comparison

Parameter	CDLL5538D/TR	1N4112DUR-1/TR
Manufacturer	Microchip Technology	Microchip Technology
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	18 V	18 V
Tolerance	±1%	±1%
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 (TJ)	-65°C ~ 175°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AA	DO-213AA
Supplier Device Package	DO-213AA	DO-213AA
Product Status	Active	Active
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

Both CDLL5538D/TR and 1N4112DUR-1/TR are active and compliant with EAR99 and HTSUS 8541.10.0050. CDLL5538D/TR holds a REACH Unaffected status. Select alternatives that match not only the electrical and mechanical parameters, but also compliance and inventory requirements as outlined above.

Frequently Asked Questions (FAQ)

Q1: Which parameters are critical for substituting a Zener diode in this category?
A1: Voltage - Zener (Nom) (Vz), Tolerance, Power - Max, Impedance (Max) (Zzt), Voltage - Forward (Vf) (Max) @ If, Operating Temperature, Mounting Type, and Package / Case are the critical parameters used in substitution.

Q2: Are there differences in packaging or mounting for the substitute part?
A2: No. Both models use surface-mount technology and are provided in the DO-213AA package with Tape & Reel packaging.

Q3: How is part status relevant to substitution?
A3: Only parts listed as "Active" are considered. This ensures continued supply continuity.

Q4: Do electrical tolerances and compliance impact selection?
A4: Yes. Both electrical tolerance (±1%) and compliance designations (e.g., REACH, ECCN, HTSUS) are used for appropriate selection within this product category.

Q5: Does supplier device package match affect compatibility?
A5: Yes. Both the main and substitute parts use DO-213AA, ensuring mechanical and assembly compatibility.

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