GRM155C81E105KE11D Murata MLCC: Applications, Selection and Buying Notes

GRM155C81E105KE11D Murata MLCC is a surface-mount multilayer ceramic capacitor specified as 1 uF, 25V, X6S, +/-10%, 0402 MLCC. It is used for local decoupling, rail bypassing, filtering or stable small-signal capacitance depending on dielectric and capacitance value. View the GRM155C81E105KE11D product detail page or contact In-Fortune for sourcing support.

What is GRM155C81E105KE11D?

GRM155C81E105KE11D is a Murata Electronics ceramic capacitor in an SMD package. It is a two-terminal, non-polarized passive component, so the practical pinout question is the PCB land pattern, solder fillet and package orientation rather than numbered IC pins. In the checked In-Fortune detail page, the part is listed as 1 uF, 25V, X6S, +/-10%, 0402 MLCC, with 0402 (1005 metric) package and General Purpose application classification.

The full purchasing model should remain GRM155C81E105KE11D. Small suffix differences in Murata MLCCs can represent packaging, thickness, voltage class, dielectric behavior or qualification differences, so engineers and buyers should not shorten the request to only capacitance and voltage.

How GRM155C81E105KE11D is used

Typical circuit role

Most designs use GRM155C81E105KE11D between a rail and ground near an IC, connector, regulator or load. For bypassing, it supplies short transient current locally while the upstream regulator and power plane respond. For a regulator input or output position, the designer must check regulator stability, minimum effective capacitance and voltage stress rather than relying only on the nominal capacitor value.

X6S gives useful capacitance density, but effective capacitance can move with DC bias, temperature and aging. A compact MLCC can lose a meaningful amount of effective capacitance under DC bias. That matters when the part is part of a hold-up budget, switching-regulator loop, impedance target or analog filter. The final design should check Murata data, rail voltage, tolerance, operating temperature and PCB layout conditions.

Layout and assembly considerations

For the 0402 (1005 metric) footprint, keep the current loop short, use a low-inductance ground return and avoid placing the capacitor in high-flex areas near board edges, connectors, screws or depanelization lines. Even though GRM155C81E105KE11D has no polarity, the pick-and-place file, land pattern, solder volume, tombstoning risk and component height still have to match the released PCB.

Key specifications for GRM155C81E105KE11D

GRM155C81E105KE11D selection guide

Select GRM155C81E105KE11D when the BOM needs 1 uF nominal capacitance, 25V voltage rating, X6S dielectric behavior, +/-10% tolerance and 0402 (1005 metric) placement. It can be a useful option for processor decoupling, module rails, sensor power, PMIC rails, compact embedded boards and other circuits where the package size and dielectric behavior fit the design constraints.

Do not select GRM155C81E105KE11D only because the capacitance matches another capacitor. Confirm derating, DC-bias loss, operating temperature, thickness, soldering profile and customer approval list. If the application needs lower loss, tighter stability or higher temperature margin, review C0G/NP0, X7R, a larger package, a parallel capacitor bank or an automotive-qualified family as appropriate.

If the design references related parts such as GRT155C81E105KE13D, GRM155C80J106ME11D, GRM033R61C105ME15D, treat each related model as a separate engineering decision. A replacement that looks close in capacitance may still change voltage margin, case size, temperature coefficient, thickness, qualification or long-term availability.

Alternatives and cross references for GRM155C81E105KE11D

Alternatives are useful for sourcing continuity, but an MLCC replacement is not automatic. Before approving a GRM155C81E105KE11D replacement, compare datasheet, dielectric, voltage, capacitance, tolerance, package, thickness, land pattern, DC-bias curve, impedance curve, temperature range, qualification level and lifecycle status.

For regulator circuits, rerun the stability and transient calculations after a substitution. For high-speed or RF-adjacent decoupling, check the impedance profile with the rest of the capacitor network. For automotive or customer-qualified builds, confirm qualification documents and the approved vendor list before accepting any change.

Buying notes and sourcing checks

Before issuing an RFQ for GRM155C81E105KE11D, confirm the complete Murata model, manufacturer name, package, capacitance, rated voltage, dielectric, tolerance, thickness, packaging method, date-code requirement, lot consistency, original factory condition, traceability documents, RoHS/REACH needs, lead time and accepted substitute range. The purchasing request should also include whether alternatives can change package size or dielectric.

Contact In-Fortune to confirm GRM155C81E105KE11D specifications, packaging suffix and sourcing path. View the GRM155C81E105KE11D product detail page. Request sourcing support for GRM155C81E105KE11D. Send an RFQ with your required quantity, application risk and delivery schedule.

GRM155C81E105KE11D FAQ

Where can I find the GRM155C81E105KE11D datasheet?

Start with the Murata product data page and the GRM155C81E105KE11D page on In-Fortune. Final approval data, product notices and packaging details should be confirmed with supplier before production use.

What is the GRM155C81E105KE11D pinout?

GRM155C81E105KE11D is a two-terminal, non-polarized MLCC. The pinout check is the PCB footprint, pad geometry, soldering process and mechanical clearance.

What applications fit Murata GRM155C81E105KE11D?

Typical applications include power-rail decoupling, bypassing, local filtering, regulator input or output capacitor banks, module supply filtering and noise reduction in compact electronics.

Can GRM155C81E105KE11D replace another capacitor with the same capacitance?

Only after checking voltage rating, dielectric, tolerance, package, thickness, effective capacitance under DC bias, operating temperature, lifecycle and qualification requirements.

Does GRM155C81E105KE11D have polarity?

No. It is a ceramic MLCC and is normally non-polarized, but assembly still requires the correct footprint and soldering process.

What should procurement confirm before buying GRM155C81E105KE11D?

Confirm the complete part number, Murata brand, package case, reel format, date code, lot requirement, original condition, compliance documents, delivery schedule and accepted alternative list.

Related internal links for GRM155C81E105KE11D

• GRM155C81E105KE11D product detail page
• Ceramic Capacitors category page
• Murata Electronics manufacturer page
• GRT155C81E105KE13D product detail page
• GRM155C80J106ME11D product detail page
• GRM033R61C105ME15D product detail page

Missing or uncertain data

• Latest Murata approval sheet, product change notice status and customer-specific AVL status: to be confirmed with supplier.
• DC-bias curve, impedance curve and effective capacitance in the final rail condition: to be confirmed against Murata data or measured in the application.
• Exact reel code, standard packing quantity, date-code range and lot requirement for the order: to be confirmed with supplier.
• Any replacement for GRM155C81E105KE11D must be approved against datasheet, package, land pattern, electrical behavior, lifecycle and certification requirements before use.