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Murata GRM User Manual

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!Caution/Notice
GRM, GR3, GRJ, GR4, GR7, GJM,
GQM, GA2, GA3, LLL, LLA, LLM,
LLR, NFM, KRM, KR3, GMA, GMD
!Caution
Notice
Storage and Operation Conditions
Rating
1. Temperature Dependent Characteristics
2. Measurement of Capacitance
3. Applied Voltage and Applied Current
4. Type of Applied Voltage and
Self-heating Temperature
5. DC Voltage and AC Voltage Characteristics
6. Capacitance Aging
7. Vibration and Shock
Soldering and Mounting
1. Mounting Position
2. Information before Mounting
3. Maintenance of the Mounting
(pick and place) Machine
4-1. Reflow Soldering
4-2. Flow Soldering
4-3. Correction of Soldered Portion
5. Washing
6. Electrical Test on Printed Circuit Board
7. Printed Circuit Board Cropping
8. Assembly
9. Die Bonding/Wire Bonding
Other
1. Under Operation of Equipment
2. Other
Rating
1. Operating Temperature
2. Atmosphere Surroundings
(gaseous and liquid)
3. Piezo-electric Phenomenon
Soldering and Mounting
1. PCB Design
1. Notice for Pattern Forms
2. Land Dimensions
3. Board Design
2. Adhesive Application
3. Adhesive Curing
4. Flux for Flow Soldering
5. Flow Soldering
6. Reflow Soldering
7. Washing
8. Coating
Other
1. Transportation
2. Characteristics Evaluation
in the Actual System
!
Note
• Please read rating and
!
CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
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Murata GRM Specifications

General IconGeneral
BrandMurata
ModelGRM
CategoryHeat Pump
LanguageEnglish

Summary

Caution

Storage and Operation Conditions

Ensures proper capacitor performance and longevity by detailing storage and operational parameters.

Rating

Defines critical electrical specifications and limits for capacitor operation.

Soldering and Mounting

Guidelines for proper soldering and mounting procedures for capacitors.

Other Cautionary Notes

Covers additional important operational considerations and precautions under Caution.

Storage and Operation Conditions

Performance Affected by Storage

Details how storage conditions affect capacitor performance and recommended practices.

Corrosive Atmosphere and Moisture Impact

Warns against corrosive gases and moisture condensation impacting solderability and performance.

Rating - Temperature Dependent Characteristics

Capacitance Change vs. Temperature

Explains how temperature affects capacitance and recommends selection criteria.

Capacitance Variation within Rated Temperature

Details capacitance variation within the rated temperature range and circuit considerations.

Rating - Measurement of Capacitance

Measurement Voltage and Frequency

Guides on measuring capacitance accurately, considering voltage and frequency effects.

AC Voltage Effects on Capacitance

Explains capacitance variation with AC voltage and selection advice.

Rating - Applied Voltage and Current

Voltage Limits and Overvoltage Consequences

Specifies maximum voltage limits and consequences of overvoltage for capacitors.

Self-Heating and Applied Voltage Impact

Addresses self-heating due to applied voltage and current, and temperature limits.

Rating - DC and AC Voltage Characteristics

DC Voltage Characteristics Explained

Describes how capacitance changes with applied DC voltage and selection considerations.

AC Voltage Characteristics Explained

Explains capacitance variation with AC voltage and selection advice.

Rating - Capacitance Aging Characteristic

Time-Dependent Capacitance Decrease

Details the decrease in capacitance over time and its impact on circuits.

Vibration and Shock Precautions

Mechanical Stress and Impact Dangers

Warns against vibration, shock, and impact damaging capacitors or affecting reliability.

Handling of Mounted PCBs

Advises on preventing damage during handling of PCBs with mounted capacitors.

Soldering and Mounting - Mounting Position

Optimal Placement and Orientation

Guidance on optimal capacitor placement and orientation to minimize stress.

Component Direction and Stress Reduction

Illustrates best practices for component alignment and stress reduction during board separation.

Soldering and Mounting - Information Before Mounting

Pre-Mounting Checks and Solderability

Key checks before mounting, including reuse, characteristics, and solderability.

Solder Type and Reliability Impact

Highlights the impact of Sn-Zn solder on MLCC reliability and the need for consultation.

Soldering and Mounting - Pick and Place Machine Maintenance

Nozzle Force Adjustment for Safety

Ensures correct nozzle pickup height to prevent board deflection and capacitor damage.

Suction Nozzle and Claw Maintenance

Emphasizes regular maintenance of suction nozzles and locating claws to prevent mounting defects.

Soldering and Mounting - Reflow Soldering Procedures

Preheating and Temperature Differential Control

Stresses the importance of preheating and controlling temperature differential for component integrity.

Solvent Immersion Temperature Management

Advises maintaining temperature difference during solvent immersion to prevent damage.

Solder Manufacturer Recommendations for Reflow

Recommends aligning reflow temperature with solder specs to avoid quality issues.

Soldering and Mounting - Optimum Solder Amount for Reflow

Solder Paste Thickness Guidelines

Guides on optimal solder paste thickness for reflow soldering to prevent cracking or detachment.

NFM Series Solder Paste Specifications

Provides specific solder paste thickness guidelines for NFM series components.

Soldering and Mounting - Flow Soldering Guidelines

Flow Soldering Applicability and Conditions

Specifies which chip sizes are suitable for flow soldering and general conditions.

Preheating and Temperature Control for Flow

Emphasizes preheating and controlling temperature differential during flow soldering.

Soldering Time and Termination Leaching

Warns against excessive soldering time or temperature causing termination leaching.

Optimum Solder Amount for Flow Soldering

Recommends solder fillet height relative to chip thickness to prevent cracking.

Soldering and Mounting - Correction of Soldered Portion

Thermal Stress and Cracking Risks

Explains how thermal stress from correction can cause cracks and impact reliability.

Soldering Iron and Spot Heater Techniques

Provides guidelines for using soldering irons and spot heaters for corrections, including techniques and parameters.

Optimum Solder Amount for Rework

Discusses solder amount criticality for rework to avoid cracking or poor adhesion.

Soldering and Mounting - Soldering Iron Tip and Solder Wire

Tip Size and Contact Method

Specifies soldering iron tip size and contact method to prevent component damage.

Solder Wire Specification for Rework

Recommends solder wire diameter and type for rework.

Soldering and Mounting - Washing Procedures

Ultrasonic Oscillation Effects on PCBs

Warns against excessive ultrasonic cleaning causing resonance, cracks, or joint failure.

Electrical Test on Printed Circuit Board

Support Pins and Vibration during Testing

Advises using support pins and avoiding vibration during PCB testing to prevent cracks.

Printed Circuit Board Cropping

Stress During Board Cropping

Explains how bending or twisting stress during PCB cropping can crack capacitors.

Printed Circuit Board Cropping Methods

Board Separation Stress Comparison

Compares stress levels of different board separation methods and recommends router type.

Jig and Apparatus Examples for Separation

Illustrates suitable jigs and apparatus for board separation to minimize stress.

Mounting Near Separation Point

Provides measures to reduce stress on components mounted near the board separation point.

Disc Separator and V-Groove Design

Disc Separator Alignment and V-Groove

Details disc separator alignment and V-groove parameters to prevent board deflection stress.

Router Type Separator Usage

Highlights router type separators for stress-free board cutting and handling precautions.

Assembly Handling and Component Mounting

Board Handling Precautions for Assembly

Advises on proper board handling to prevent bending and damage to mounted capacitors.

Mounting Other Components on PCB

Warns against board deflection stress when mounting components on the back side.

Inserting Components with Leads into Boards

Recommends hole sizing, support pins, and board support to prevent cracks during lead insertion.

Attaching Sockets and Tightening Screws

Guides on preventing board bending during socket attachment and screw tightening.

Die Bonding and Wire Bonding Procedures

Die Bonding Materials and Methods

Details materials and procedures for die bonding capacitors using brazing alloys.

Wire Bonding Materials and Techniques

Outlines materials and techniques for wire bonding, including gold wire and bonding parameters.

Other Operational Precautions

Handling and Short-Circuit Prevention

Advises against direct contact and terminal short-circuits to prevent electrical hazards.

Environmental Conditions and Measures

Lists unsuitable environments and the need for damp-proof measures.

Emergency Procedures and Waste Disposal

Emergency Response Actions

Provides immediate actions for smoke, fire, or high temperature to prevent worsening hazards.

Waste Disposal Guidelines for Capacitors

Specifies that capacitors must be disposed of via licensed industrial waste vendors.

Circuit Design Considerations

Fail Safe Function and Fuse Implementation

Recommends fail-safe functions like fuses to prevent secondary accidents from cracked capacitors.

Safety Standard Certification Requirements

Emphasizes using safety-certified products for EMI prevention and AC circuits.

AC Withstanding Voltage Test Conditions

Details test equipment and voltage application methods for AC withstanding voltage tests.

Remarks on Potential Failure Modes

Warns that failures can lead to short circuits and smoking, and data is typical.

Notice - Rating Information

Operating Temperature Limits

Defines operating temperature limits and self-heating considerations for capacitor selection.

Atmosphere Surroundings Impact

Discusses how atmosphere affects capacitor terminations and insulation resistance.

Piezo-electric Phenomenon and Noise

Explains vibration-induced noise in high dielectric constant capacitors and noise suppression.

Notice - Soldering and Mounting - PCB Design

Pattern Forms Guidelines for PCBs

Provides guidelines on land patterns to mitigate stress and prevent chip cracking.

PCB Expansion/Contraction Stress Effects

Explains how PCB material and thermal expansion differences can cause capacitor cracking.

NFM Series Ground Pattern for Noise Suppression

Recommends large ground patterns for NFM series to improve noise suppression effectiveness.

Notice - Land Dimensions for Soldering

Flow Soldering Land Dimensions

Provides land dimensions for flow soldering based on chip size and series.

Reflow Soldering Land Dimensions

Lists land dimensions for reflow soldering across various series and chip sizes.

Notice - Slit Dimensions for Land Design

Slit Design for Flux Cleaning and Coating

Explains slit design for flux cleaning and resin coating, advising on length for mechanical stress.

Notice - NFM Series Land Dimensions for Soldering

NFM Series Reflow Soldering Lands

Details land dimensions for NFM series in reflow soldering, including via hole specifications.

NFM Series Flow Soldering Lands

Provides land dimensions for NFM series in flow soldering, with part number and size information.

Notice - Board Design Considerations

Strain Relationship to Board Properties

Analyzes how board thickness, length, and width affect strain and capacitor stress.

Notice - Adhesive Application Guidelines

Adhesive Selection Criteria

Lists key points for selecting adhesives, focusing on strength, corrosion, and health safety.

Notice - Adhesive Curing Procedures

Curing for Strength and Insulation

Emphasizes controlling curing temperature and time to ensure strength and prevent insulation issues.

Notice - Flux for Flow Soldering

Flux Amount and Type Recommendations

Guides on using flux thinly and evenly, avoiding high halide or strong acid content.

Notice - Flow Soldering Termination Leaching

Leaching Limits During Flow Soldering

Specifies limits for termination leaching during flow soldering to maintain chip integrity.

Notice - Reflow Soldering Flux Effects

Flux Corrosion Risk in Reflow

Warns that strong acidic flux in reflow solder paste can corrode capacitors.

Notice - Washing Procedures and Precautions

Cleaning Equipment Evaluation

Recommends evaluating cleaning equipment and solvents to confirm quality and select best options.

Residual Flux Impact on Reliability

Warns that residual flux can degrade electrical characteristics and reliability.

Notice - Capacitor Coating Guidelines

Coating Stress and Expansion Effects

Explains how coating resin contraction and thermal expansion differences can cause cracks or peeling.

Hygroscopic and Corrosive Resin Selection

Advises selecting less hygroscopic and non-corrosive resins to maintain insulation resistance.

Notice - Transportation Precautions

Transportation Conditions and Protection

Details required protection against temperature, humidity, and mechanical force during transport.

Mechanical Shock During Transport

Warns against excessive vibration, shock, or pressure during transport causing damage.

Notice - Actual System Evaluation

System Performance Confirmation

Stresses the need to evaluate capacitors in the actual system for performance and specification confirmation.

Voltage and Temperature Dependency in Systems

Highlights voltage and temperature dependency of capacitance in high dielectric types.

Surge Voltage and Noise Effects in Systems

Advises evaluating surge resistance and noise suppression effects in the actual system.