CAS17C471KARFC Equivalent & Substitute Parts

Part Overview

The CAS17C471KARFC is a 470 pF safety-rated ceramic capacitor manufactured by KEMET, designed for applications requiring X1/Y2 safety certifications at 250VAC. This Surface Mount MLCC (Multilayer Ceramic Capacitor) in 1808 (4520 Metric) package is actively produced and widely used in safety-critical filtering and coupling applications. Equivalent parts are identified to provide supply chain flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

CAS17C471KARFC

KEMETIn Stock: 1429CAS17C471KARFC Datasheet

Current PartRFQ

SAFC1808X7R502-471KNE

VenkelIn Stock: 4992SAFC1808X7R502-471KNE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CAS17C471KARFC is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 470 pF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 250VAC (exact match required)
• Temperature Coefficient: X7R (exact match required)
• Safety Ratings: X1, Y2 (exact match required)
• Package Designation: 1808 (4520 Metric) (exact match required)
• Mounting Technology: Surface Mount, MLCC (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The substitute part SAFC1808X7R502-471KNE meets all these criteria and is therefore electrically and mechanically interchangeable.

Parameter Comparison

Engineering Selection Recommendations

Both the CAS17C471KARFC and SAFC1808X7R502-471KNE are active production components with identical electrical specifications and regulatory compliance status. Selection between these parts may be based on:

• Supply Availability: SAFC1808X7R502-471KNE currently has higher inventory (4928 pcs vs. 1356 pcs)
• Procurement Lead Time: Verify current lead times with respective distributors
• Regulatory Requirements: Both parts meet ROHS3 compliance and REACH requirements
• Certification Documentation: Confirm that design documentation accepts either manufacturer for safety-rated applications

Frequently Asked Questions (FAQ)

Q: Can SAFC1808X7R502-471KNE be used as a direct replacement for CAS17C471KARFC?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including capacitance, voltage rating, temperature coefficient, safety ratings, package dimensions, and regulatory compliance.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist within tolerance: CAS17C471KARFC is 0.177" L × 0.080" W (4.50mm × 2.03mm), while SAFC1808X7R502-471KNE is 0.181" L × 0.079" W (4.60mm × 2.00mm). Both are 1808 (4520 Metric) package designations with identical thickness (0.087" / 2.20mm maximum). These variations are within standard PCB footprint tolerances for 1808 components.

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

A: Yes. Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts suitable for safety-critical applications?

A: Yes. Both parts carry X1, Y2 safety ratings and are designed for safety applications requiring 250VAC rated components.

Q: What is the difference in packaging between these parts?

A: Both parts are supplied in Tape & Reel (TR) format, the standard packaging for automated assembly processes.