1812J1000270KCT Equivalent & Substitute Parts

Part Overview

The 1812J1000270KCT is a 27 pF ceramic capacitor manufactured by Knowles Syfer, rated for 100V with C0G/NP0 temperature coefficient characteristics. This component is designed for general-purpose applications requiring stable capacitance across temperature variations. The part is currently in active production status with 805 units available in inventory. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and performance optimization options for applications where voltage ratings, tolerance specifications, or physical dimensions may differ from the original specification.

Substiute Parts

1812J1000270KCT

Knowles SyferIn Stock: 8831812J1000270KCT Datasheet

Current PartRFQ

C1812C270JCGAC7800

KEMETIn Stock: 2102C1812C270JCGAC7800 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812J1000270KCT is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 27 pF
• Package / Case: 1812 (4532 Metric)
• Temperature Coefficient: C0G, NP0
• Mounting Type: Surface Mount, MLCC
• Operating Temperature Range: -55°C ~ 125°C

Allowable Variation Parameters:

• Voltage Rating: Equal to or greater than 100V
• Tolerance: Equal to or tighter than ±10%
• Physical Thickness: Must accommodate board layout constraints
• Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align

The identified substitute part C1812C270JCGAC7800 from KEMET maintains identical capacitance, package, temperature coefficient, and operating temperature specifications. The substitute provides enhanced voltage rating (500V versus 100V) and improved tolerance (±5% versus ±10%), making it suitable for applications requiring higher voltage margins or tighter capacitance stability. Physical thickness differs (1.80mm versus 2.50mm), which may provide layout advantages in space-constrained designs.

Parameter Comparison

Engineering Selection Recommendations

Both the 1812J1000270KCT and C1812C270JCGAC7800 are active production components with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), suitable for standard manufacturing and storage conditions without special handling requirements.

The original Knowles Syfer part is appropriate for applications with 100V maximum operating voltage and where ±10% capacitance tolerance meets circuit requirements.

The KEMET substitute is appropriate for applications requiring higher voltage headroom (500V rating), improved capacitance stability (±5% tolerance), or reduced board thickness (1.80mm versus 2.50mm). The substitute maintains full electrical and mechanical compatibility with the original specification while providing enhanced performance margins.

Selection between these parts depends on circuit voltage requirements, tolerance specifications, and physical layout constraints. Both parts are functionally interchangeable within their respective electrical and mechanical operating parameters.

Frequently Asked Questions (FAQ)

Q: Can C1812C270JCGAC7800 directly replace 1812J1000270KCT in all applications?

A: Yes, within the constraints of your circuit design. The substitute maintains identical capacitance (27 pF), package (1812), temperature coefficient (C0G/NP0), and operating temperature range (-55°C to 125°C). The higher voltage rating (500V) and tighter tolerance (±5%) are compatible with any application designed for the original 100V, ±10% specification. Verify that your PCB layout accommodates the thinner profile (1.80mm versus 2.50mm).

Q: What is the significance of the C0G/NP0 temperature coefficient?

A: C0G (also designated NP0) indicates negligible capacitance change across the operating temperature range of -55°C to 125°C. This temperature coefficient is essential for applications requiring stable capacitance performance independent of ambient temperature variations. Both the original and substitute parts share this specification.

Q: Does the ±5% tolerance of the substitute part provide any circuit advantage over the ±10% original?

A: Tighter tolerance (±5%) provides improved capacitance predictability and reduced circuit performance variation. This is beneficial in precision applications such as RF tuning, timing circuits, or filter networks where capacitance accuracy directly affects circuit performance. If your application does not require this precision, the original ±10% tolerance part is adequate.

Q: Are there any compatibility concerns with the different physical thickness?

A: The substitute part is thinner (1.80mm versus 2.50mm), which may provide layout advantages in space-constrained designs. Verify that your PCB assembly process and component placement equipment accommodate the thinner profile. No electrical compatibility issues exist due to thickness difference.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. Standard manufacturing and warehouse conditions are acceptable. No baking or desiccant storage is required before assembly.

Q: Are both parts RoHS compliant?

A: Yes, both 1812J1000270KCT and C1812C270JCGAC7800 are ROHS3 compliant, meeting current environmental and hazardous substance restrictions for electronic components.