CDLL5245 Zener Diode Equivalent & Substitute Parts

Part Overview

The CDLL5245 is a Zener diode manufactured by Microchip Technology, rated at 15 V nominal with ±20% tolerance in a DO-213AB surface mount package. This component is designed for voltage regulation and protection applications requiring a 15 V reference. The part is currently in active production status with 871 pieces available in inventory.

Substitute parts are identified when they maintain identical electrical performance within the specified operating parameters while offering alternative tolerance grades or improved availability. The CDLL5245B provides a tighter tolerance specification (±5%) while maintaining all other electrical and mechanical characteristics.

Substiute Parts

CDLL5245

Microchip TechnologyIn Stock: 961CDLL5245 Datasheet

Current PartRFQ

CDLL5245B

Microchip TechnologyIn Stock: 1280CDLL5245B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL5245 is determined by the following critical parameters:

1. Zener Voltage (Vz): Must equal 15 V nominal
2. Package Type: Must be DO-213AB surface mount
3. Impedance (Zzt): Must not exceed 16 Ohms maximum
4. Reverse Leakage Current: Must not exceed 100 nA @ 11 V
5. Forward Voltage (Vf): Must not exceed 1.1 V @ 200 mA
6. Operating Temperature Range: Must span -65°C to 175°C minimum

The CDLL5245B qualifies as a direct substitute because it maintains identical values for all critical electrical parameters. The tolerance specification difference (±5% versus ±20%) represents an improvement in voltage accuracy without affecting functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

CDLL5245: Select this part number when ±20% voltage tolerance is acceptable for the application and cost optimization is a priority. Both CDLL5245 and CDLL5245B are active products with full production support from Microchip Technology.

CDLL5245B: Select this part number when tighter voltage accuracy (±5% tolerance) is required for precision voltage regulation or reference applications. The CDLL5245B offers improved voltage stability with 1219 pieces currently in inventory, providing enhanced availability.

Both parts share identical compliance status (RoHS non-compliant, REACH Unaffected) and are suitable for applications requiring unlimited moisture sensitivity handling (MSL 1). Selection between these parts depends solely on the tolerance requirement of the specific circuit design.

Frequently Asked Questions (FAQ)

Q: Can CDLL5245B replace CDLL5245 in existing designs?

A: Yes. The CDLL5245B is a direct substitute with identical electrical performance across all critical parameters. The ±5% tolerance of the CDLL5245B is tighter than the ±20% tolerance of the CDLL5245, making it compatible with any application designed for the original part.

Q: What is the difference between CDLL5245 and CDLL5245B?

A: The primary difference is the Zener voltage tolerance specification. CDLL5245 has ±20% tolerance, while CDLL5245B has ±5% tolerance. All other electrical characteristics, including impedance, leakage current, forward voltage, and operating temperature range, are identical.

Q: Are both parts available in the same package?

A: Yes. Both CDLL5245 and CDLL5245B are supplied in DO-213AB surface mount package (MELF form factor), ensuring mechanical and thermal compatibility in PCB assembly.

Q: What compliance certifications apply to these parts?

A: Both parts are RoHS non-compliant and REACH Unaffected. Both carry MSL 1 (Unlimited) moisture sensitivity rating, requiring no special moisture control during storage or handling.

Q: Which part should be selected for voltage reference applications?

A: For applications requiring stable voltage reference performance, CDLL5245B is the appropriate selection due to its ±5% tolerance specification, which provides superior voltage accuracy compared to the ±20% tolerance of CDLL5245.

Q: Are there any temperature-related differences between these parts?

A: No. Both parts operate across the identical temperature range of -65°C to 175°C with no performance variation between the two part numbers in this specification.