CDLL965 Zener Diode 15V 500mW Equivalent & Substitute Parts

Part Overview

The CDLL965 is an active Zener diode manufactured by Microchip Technology, rated for 15 V nominal Zener voltage with 500 mW maximum power dissipation in a surface mount DO-213AB (MELF) package. This component is designed for voltage regulation and protection applications requiring stable reverse breakdown characteristics across industrial temperature ranges.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter tolerances. The CDLL965 series includes variants with improved voltage tolerance specifications that may be selected based on application precision requirements.

Substiute Parts

CDLL965

Microchip TechnologyIn Stock: 1078CDLL965 Datasheet

Current PartRFQ

CDLL965B

Microchip TechnologyIn Stock: 1208CDLL965B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL965 is determined by equivalence in the following critical parameters:

Electrical Equivalence Criteria:

• Nominal Zener voltage: 15 V (fixed across all variants)
• Maximum power dissipation: 500 mW (fixed across all variants)
• Impedance (Max): 16 Ohms (fixed across all variants)
• Reverse leakage current: 500 nA @ 11 V (fixed across all variants)
• Forward voltage: 1.1 V @ 200 mA (fixed across all variants)
• Operating temperature range: -65°C to 175°C (fixed across all variants)

Mechanical Equivalence Criteria:

• Package type: DO-213AB, MELF (fixed across all variants)
• Mounting type: Surface Mount (fixed across all variants)

Tolerance Variation: The primary distinction between CDLL965 variants is the Zener voltage tolerance specification. The CDLL965 carries ±20% tolerance, while substitute variants may offer tighter tolerance specifications (±5%) for applications requiring improved voltage accuracy. This represents an enhancement rather than a limitation, permitting direct substitution in designs where the original ±20% tolerance is acceptable.

Parameter Comparison

Engineering Selection Recommendations

CDLL965 (±20% Tolerance): Select this part number for applications where voltage regulation tolerances of ±20% are acceptable. Both CDLL965 and CDLL965B maintain active product status with identical electrical and mechanical specifications, ensuring long-term availability and supply chain stability.

CDLL965B (±5% Tolerance): Select this part number for applications requiring tighter Zener voltage accuracy. The ±5% tolerance specification provides improved voltage regulation precision compared to the standard ±20% variant. This part is a direct mechanical and electrical substitute with enhanced tolerance performance.

Both variants are manufactured by Microchip Technology with identical RoHS non-compliance and REACH Unaffected status. Selection between these variants depends solely on the application's voltage tolerance requirements. The CDLL965B represents a higher-precision alternative suitable for designs where tighter voltage regulation is specified.

Frequently Asked Questions (FAQ)

Q: Can CDLL965B be used as a direct replacement for CDLL965?

A: Yes. The CDLL965B is a direct substitute for CDLL965. Both parts share identical electrical characteristics (15 V nominal Zener voltage, 500 mW power rating, 16 Ohms impedance), identical mechanical packaging (DO-213AB, MELF surface mount), and identical operating temperature range (-65°C to 175°C). The CDLL965B offers improved voltage tolerance (±5% versus ±20%), making it suitable for applications where the original tolerance specification is acceptable.

Q: What is the primary difference between CDLL965 and CDLL965B?

A: The primary difference is the Zener voltage tolerance specification. CDLL965 carries ±20% tolerance, while CDLL965B carries ±5% tolerance. All other electrical parameters, mechanical specifications, and operating characteristics are identical.

Q: Are both parts available in the same package?

A: Yes. Both CDLL965 and CDLL965B are supplied in DO-213AB (MELF) surface mount packages with identical pin configurations and footprints. No PCB layout modifications are required when substituting between these variants.

Q: Do these parts have the same moisture sensitivity rating?

A: Yes. Both CDLL965 and CDLL965B carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are there any compliance differences between the two parts?

A: No. Both CDLL965 and CDLL965B share identical RoHS non-compliance status and REACH Unaffected status. No compliance advantages exist between the variants.

Q: Which part should be selected for new designs?

A: Selection depends on the application's voltage tolerance requirements. For designs requiring ±20% tolerance, either part is suitable. For designs requiring tighter voltage accuracy, CDLL965B with ±5% tolerance is the appropriate selection. Both parts maintain active product status with equivalent long-term availability.