CDLL5527C/TR Equivalent & Substitute Parts

Part Overview

The CDLL5527C/TR is a Zener diode voltage regulator manufactured by Microchip Technology, classified as a surface mount component in the DO-213AA package. This device operates as a 7.5 V Zener diode with 500 mW power dissipation capability and ±2% voltage tolerance. The component is actively produced and maintained in inventory, serving applications requiring precision voltage regulation and transient suppression in electronic circuits. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when specific tolerance or compliance requirements necessitate component alternatives.

Substiute Parts

CDLL5527C/TR

Microchip TechnologyIn Stock: 1009CDLL5527C/TR Datasheet

Current PartRFQ

1N5527DUR-1/TR

Microchip TechnologyIn Stock: 13381N5527DUR-1/TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDLL5527C/TR is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Zener voltage nominal value: 7.5 V
• Maximum power dissipation: 500 mW
• Package type: DO-213AA
• Mounting configuration: Surface Mount
• Operating temperature range: -65°C to 175°C
• Impedance (maximum): 35 Ohms
• Reverse leakage current: 500 nA @ 6.8 V
• Forward voltage: 1.1 V @ 200 mA

Allowable Variation:

• Voltage tolerance may be tighter (lower tolerance value) than the original specification without affecting circuit compatibility, provided the nominal Zener voltage remains 7.5 V

The substitute part 1N5527DUR-1/TR meets all mandatory parameters and provides improved voltage tolerance (±1% versus ±2%), making it a direct functional equivalent suitable for applications requiring enhanced precision.

Parameter Comparison

Engineering Selection Recommendations

Both the CDLL5527C/TR and 1N5527DUR-1/TR are active products manufactured by Microchip Technology with identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0050). Both components are REACH Unaffected, confirming compliance with environmental regulations.

The 1N5527DUR-1/TR substitute provides tighter voltage tolerance (±1% versus ±2%), which represents an improvement in precision without any degradation in other electrical or thermal characteristics. This tighter tolerance makes the substitute suitable for applications where voltage regulation accuracy is critical.

Selection between these parts should be based on:

1. Availability: The 1N5527DUR-1/TR currently maintains higher inventory (1257 pcs versus 966 pcs), providing improved supply chain continuity.

2. Tolerance Requirements: Applications requiring ±1% voltage accuracy should specify the 1N5527DUR-1/TR. Applications with ±2% tolerance specifications can use either part.

3. Regulatory Compliance: Both parts carry identical compliance certifications and are suitable for equivalent applications.

4. Thermal Performance: Both parts operate across the full -65°C to 175°C temperature range with identical thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 1N5527DUR-1/TR directly replace the CDLL5527C/TR in existing designs?

A: Yes. The 1N5527DUR-1/TR is a direct functional equivalent with identical electrical characteristics across all critical parameters including Zener voltage, power rating, impedance, and operating temperature range. The tighter tolerance specification (±1%) represents an improvement and does not introduce compatibility issues.

Q: What is the significance of the tolerance difference between ±2% and ±1%?

A: Tolerance specifies the allowable deviation of the Zener voltage from the nominal 7.5 V value. The ±2% tolerance on the CDLL5527C/TR allows voltage variation between 7.35 V and 7.65 V. The ±1% tolerance on the 1N5527DUR-1/TR restricts variation to 7.425 V and 7.575 V. Applications requiring tighter voltage regulation benefit from the ±1% specification.

Q: Are the DO-213AA packages physically identical?

A: Yes. Both parts use the DO-213AA surface mount package, ensuring identical footprint, lead spacing, and PCB assembly compatibility.

Q: Do both parts require identical handling and storage conditions?

A: The 1N5527DUR-1/TR specifies Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions. The CDLL5527C/TR does not specify MSL, but both parts are suitable for standard component storage and handling procedures.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. Both parts maintain identical operating temperature specifications from -65°C to 175°C junction temperature, ensuring equivalent performance across the full thermal operating range.

Q: What is the difference between the part numbers CDLL5527C/TR and 1N5527DUR-1/TR?

A: Both are Microchip Technology Zener diodes with identical electrical specifications. The different part numbers reflect different product lines or manufacturing processes within Microchip's portfolio. The functional equivalence is confirmed by matching all critical electrical and thermal parameters.