CDLL5538C/TR Equivalent & Substitute Parts

Part Overview

The CDLL5538C/TR is an active Zener diode voltage regulator manufactured by Microchip Technology, classified as a surface mount component in the DO-213AA package. This 18 V, 500 mW Zener diode is designed for voltage regulation and protection applications requiring stable reference voltage performance across industrial temperature ranges. The part is currently in active production status with 994 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part number becomes unavailable or where alternative tolerance specifications are acceptable within system design parameters.

Substiute Parts

CDLL5538C/TR

Microchip TechnologyIn Stock: 1102CDLL5538C/TR Datasheet

Current PartRFQ

1N4112DUR-1/TR

Microchip TechnologyIn Stock: 11221N4112DUR-1/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL5538C/TR is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - Zener (Nominal): 18 V
• Power - Maximum: 500 mW
• Package / Case: DO-213AA
• Mounting Type: Surface Mount
• Packaging: Tape & Reel (TR)

Allowable Variation Parameters:

• Tolerance: ±2% (main part) to ±1% (substitute) — tighter tolerance is acceptable
• Impedance (Maximum): 100 Ohms (both parts match)
• Current - Reverse Leakage @ Vr: 10 nA @ 16.2 V (main) vs. 50 nA @ 13.7 V (substitute) — within acceptable operational variance
• Voltage - Forward (Maximum) @ If: 1.1 V @ 200 mA (both parts match)
• Operating Temperature Range: -65°C to 175°C (both parts match)

The substitute part 1N4112DUR-1/TR meets all mandatory electrical and mechanical parameters while offering improved tolerance specification (±1% vs. ±2%), making it a direct functional equivalent for voltage regulation applications.

Parameter Comparison

Engineering Selection Recommendations

Both the CDLL5538C/TR and 1N4112DUR-1/TR are active production components manufactured by Microchip Technology with identical regulatory compliance classifications (ECCN: EAR99, HTSUS: 8541.10.0050). Both parts are REACH Unaffected and suitable for industrial applications.

Selection Criteria:

The 1N4112DUR-1/TR substitute part is electrically and mechanically equivalent to the CDLL5538C/TR across all critical parameters. The substitute offers a tighter tolerance specification (±1% vs. ±2%), which provides improved voltage regulation accuracy without any performance degradation. Both parts operate across the identical temperature range (-65°C to 175°C) and share the same DO-213AA surface mount package in Tape & Reel configuration.

Component selection between these two parts should be based on:

• Availability and inventory status (1043 units available for 1N4112DUR-1/TR vs. 994 units for CDLL5538C/TR)
• Tolerance requirements of the specific application (±1% vs. ±2%)
• Supply chain lead times and procurement schedules

Both parts are suitable for direct substitution in voltage regulation and protection circuits without circuit redesign or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can the 1N4112DUR-1/TR be used as a direct replacement for the CDLL5538C/TR?

A: Yes. Both parts are 18 V, 500 mW Zener diodes in DO-213AA surface mount packages with identical electrical performance across all critical parameters. The substitute part features a tighter tolerance specification (±1% vs. ±2%), which is compatible with applications designed for the original part.

Q: What is the difference in tolerance between these two parts?

A: The CDLL5538C/TR has a tolerance of ±2%, while the 1N4112DUR-1/TR has a tolerance of ±1%. The tighter tolerance of the substitute part provides improved voltage regulation accuracy and is acceptable for all applications requiring the original part's ±2% specification.

Q: Are the packages identical?

A: Yes. Both parts use the DO-213AA surface mount package and are supplied in Tape & Reel (TR) configuration. No PCB layout modifications or assembly process changes are required for substitution.

Q: Do these parts have the same operating temperature range?

A: Yes. Both the CDLL5538C/TR and 1N4112DUR-1/TR operate across the identical temperature range of -65°C to 175°C (TJ).

Q: What is the difference in reverse leakage current?

A: The CDLL5538C/TR specifies 10 nA @ 16.2 V, while the 1N4112DUR-1/TR specifies 50 nA @ 13.7 V. These values represent normal operational variance within the Zener diode product family and do not affect functional equivalence for voltage regulation applications.

Q: Are both parts currently in active production?

A: Yes. Both the CDLL5538C/TR and 1N4112DUR-1/TR are active production components from Microchip Technology with current inventory availability.

Q: Do these parts have the same regulatory compliance?

A: Yes. Both parts share identical regulatory classifications: ECCN EAR99, HTSUS 8541.10.0050, and REACH Unaffected status.