ST18B102K500CT Equivalent & Substitute Parts

Part Overview

The ST18B102K500CT is a 1000 pF ceramic capacitor manufactured by Walsin Technology Corporation, rated for 50V operation with X7R temperature coefficient characteristics. This surface-mount multilayer ceramic capacitor (MLCC) in 0603 package format is designed for automotive and boardflex-sensitive applications. The part maintains Active product status and carries AEC-Q200 automotive qualification. Substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining identical electrical and mechanical specifications.

Substiute Parts

ST18B102K500CT

Walsin Technology CorporationIn Stock: 1277ST18B102K500CT Datasheet

Current PartRFQ

C0603X102K5RECAUTO

KEMETIn Stock: 17692C0603X102K5RECAUTO Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ST18B102K500CT is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part C0603X102K5RECAUTO from KEMET meets substitution criteria through identical specifications in the following key parameters:

• Capacitance value: 1000 pF
• Tolerance: ±10%
• Voltage rating: 50V
• Temperature coefficient: X7R
• Operating temperature range: -55°C ~ 125°C
• Package format: 0603 (1608 Metric)
• Mounting type: Surface Mount, MLCC
• Physical dimensions: 0.063" L x 0.031" W (1.60mm x 0.80mm)
• Thickness: 0.034" (0.87mm)
• Moisture sensitivity level: 1 (Unlimited)
• Soft termination feature
• AEC-Q200 automotive qualification

Both parts are classified as parametric equivalents, meaning they are electrically and mechanically interchangeable within the specified design parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the ST18B102K500CT and C0603X102K5RECAUTO are Active products with full AEC-Q200 automotive qualification, making either part suitable for automotive and boardflex-sensitive applications. Selection between these parts should be based on:

Availability and Lead Time: The KEMET C0603X102K5RECAUTO maintains higher inventory levels (17,652 pcs) compared to the Walsin ST18B102K500CT (1,167 pcs), providing improved availability for high-volume production requirements.

Compliance Status: The KEMET substitute carries explicit ROHS3 compliance and REACH Unaffected status documentation. Both parts share identical ECCN (EAR99) and HTSUS (8532.24.0020) classifications.

Series Designation: The KEMET part is designated within the ESD SMD Auto X7R series, indicating additional ESD protection features beyond the base specification. The Walsin part is designated within the ST series.

Electrical Equivalence: Both parts deliver identical electrical performance across all specified parameters, including capacitance, tolerance, voltage rating, temperature coefficient, and operating temperature range.

Mechanical Compatibility: Identical package dimensions, mounting type, and physical characteristics ensure direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the C0603X102K5RECAUTO directly replace the ST18B102K500CT in existing designs?

A: Yes. Both parts are parametric equivalents with identical capacitance (1000 pF), tolerance (±10%), voltage rating (50V), temperature coefficient (X7R), operating temperature range (-55°C ~ 125°C), and 0603 package dimensions. No circuit modifications or PCB layout changes are required.

Q: Are there differences in automotive qualification between these parts?

A: No. Both parts carry AEC-Q200 automotive qualification and are suitable for automotive and boardflex-sensitive applications.

Q: What is the significance of the X7R temperature coefficient?

A: X7R temperature coefficient indicates that capacitance variation remains within ±15% across the full operating temperature range of -55°C to 125°C. This characteristic is identical for both parts.

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

A: Yes. Both parts are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control measures are required during storage, handling, or assembly.

Q: Are the physical dimensions identical for PCB footprint compatibility?

A: Yes. Both parts measure 0.063" L x 0.031" W (1.60mm x 0.80mm) with maximum thickness of 0.034" (0.87mm), ensuring identical PCB footprint compatibility.

Q: What does "Soft Termination" mean for these capacitors?

A: Soft Termination refers to the termination design that reduces mechanical stress on the ceramic body during thermal cycling and mechanical shock, improving reliability in automotive applications.

Q: Is there a difference in ESD protection between these parts?

A: The KEMET C0603X102K5RECAUTO is designated within the ESD SMD Auto X7R series, indicating ESD protection features. The Walsin ST18B102K500CT does not carry explicit ESD designation. Both parts meet identical electrical specifications for the stated application.

Q: Can these parts be used interchangeably in high-volume production?

A: Yes, provided that design validation has been completed for the selected manufacturer. Both parts meet identical electrical and mechanical specifications and carry AEC-Q200 qualification.