GA355DR7GF472KW01L - 4.7nF 250VAC X7R Safety Capacitor | Murata
N.º de pieza: GA355DR7GF472KW01L ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.88 | $0,88 |
| 10 | $0.78 | $7,80 |
| 100 | $0.65 | $65,00 |
| 500 | $0.55 | $275,00 |
| 1.000 | $0.49 | $490,00 |
GA355DR7GF472KW01L Descripción general
A safety capacitor is a discrete component specifically designed and certified for use in circuits that are galvanically connected to the AC mains, where a single failure must not create an electric-shock hazard. Safety capacitors are divided into Class X (across-line) and Class Y (line-to-ground) categories, each with sub-classes that specify the peak pulse voltage they can survive. The GA3 series from Murata carries the X1/Y2 safety rating per IEC 60384-14, allowing it to be used in either position across the AC line or between line and protective earth, which is why it appears in switch-mode power supplies, industrial motor drives, and EV charging interfaces.
The X7R dielectric gives the GA355DR7GF472KW01L a useful combination of moderately high volumetric efficiency, predictable temperature behavior, and DC-bias characteristics that are suitable for filtering, snubbing, and decoupling roles in primary-side power stages. Unlike Class-2 Y5V dielectrics, X7R parts retain at least 85% of nominal capacitance across the full industrial temperature window, ensuring consistent EMI-suppression performance in SMPS input filters and across zero-crossing detection circuits. The 250 VAC rating gives sufficient margin for 230 V nominal mains with transient over-voltages up to 2.5 kV peak that occur during lightning-induced surge events.
From an electrical standpoint, this part is intended for noise suppression across AC-line terminals (X1 class) and line-to-ground filtering (Y2 class) in switch-mode power supplies, induction-cooktop controllers, photovoltaic inverters, and Class-D audio amplifiers where Class-Y safety isolation is mandatory. Typical insertion loss in a 50 Ω system exceeds 20 dB from 1 MHz to 100 MHz, which is sufficient to attenuate differential-mode and common-mode conducted EMI before it reaches the LISN measurement point.
Design considerations include derating for DC-bias capacitance loss: at 250 VDC the effective capacitance is approximately 40-50% of the nominal 4.7 nF. The 2220 footprint requires 1 square cm of bottom-side copper for proper mechanical reliability during thermal cycling, and the recommended land pattern follows IPC-7351 nominal density. When sourcing, always match the trailing suffix (L = standard reel packaging, K = ±10% tolerance) to ensure drop-in compatibility.
This page synthesizes distributor pricing, drop-in alternatives, and design notes for the GA355DR7GF472KW01L not aggregated elsewhere.
Alternativas directas para GA355DR7GF472KW01L — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
GA355DR7GF472KW01K
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
GA355QR7GB472KW01L
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
GA355ER7GF472KW01L
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CD12-E2GA222MY2S
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
VY2222M35Y5US6UV7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
B32D7ABY5H5V
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
GA355DR7GF472KW01L Valores máximos y características eléctricas
| Capacitance | 4700 pF (4.7 nF) |
| Capacitance Tolerance | ±10% |
| Working Voltage (AC) | 250 VAC |
| Dielectric Characteristic | X7R |
| Temperature Coefficient | ±15% (-55 °C to +125 °C) |
| Rango de temperatura de funcionamiento | -55 °C to +125 °C |
| Encapsulado / Carcasa | 2220 (5750 metric) |
| Package Dimensions | 5.7 mm × 5.0 mm |
| Tipo de montaje | Surface Mount (SMD) |
| Safety Class | X1 / Y2 (per IEC 60384-14) |
| Termination Style | Solder coated Ni barrier |
| Packaging | Tape & Reel (suffix L) |
| Nivel MSL | 1 (unlimited floor life) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Guía de configuración de pines de GA355DR7GF472KW01L 5.7 mm × 5.0 mm
Configuración de pines para GA355DR7GF472KW01L (encapsulado 5.7 mm × 5.0 mm). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para GA355DR7GF472KW01L.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
GA355DR7GF472KW01L es adecuado para 6 aplicacións: Switch-Mode Power Supply Input Filter, AC Motor Drive EMI Suppression, Photovoltaic Inverter AC-Side Filter, Class-D Audio Amplifier Output Filter, EV Charging Module Primary-Side Filter, Induction Cooktop Line Filter.
Switch-Mode Power Supply Input Filter
The GA355DR7GF472KW01L provides X1 across-line and Y2 line-to-ground filtering in SMPS input stages where IEC 60384-14 safety isolation is mandatory. With 4700 pF of capacitance and >20 dB insertion loss from 1-100 MHz in a 50 Ω LISN setup, it attenuates both differential-mode and common-mode conducted EMI before it reaches the measurement point. The 2220 case dissipates heat efficiently and the X7R dielectric retains at least 85% of nominal capacitance across the -55 °C to +125 °C industrial window, making it well-suited for SMPS modules in industrial and consumer equipment.
Recomendado
AC Motor Drive EMI Suppression
In industrial motor-drive inverters the GA355DR7GF472KW01L is placed across each output phase terminal and from phase to protective earth to suppress dv/dt-induced EMI that could otherwise couple back into the mains. The dual X1/Y2 rating gives engineers one BOM line for both filtering positions, and the 250 VAC continuous rating covers 230 V industrial mains with margin for surge events up to 4 kV per IEC 60384-14. The 4.7 nF value is sufficient to roll off common-mode noise above 1 MHz while keeping earth-return currents within IEC 61800-3 drive-system EMI limits.
Recomendado
Photovoltaic Inverter AC-Side Filter
The GA355DR7GF472KW01L is used on the AC output side of photovoltaic string inverters as a Y2-rated line-to-ground safety capacitor, providing common-mode filtering that meets the galvanic-isolation requirements of IEC 62109. Its 250 VAC continuous rating is well matched to 230 V grid-tie applications and the 4.7 nF value, combined with X7R stability, suppresses switching-frequency common-mode currents between the inverter chassis and the AC protective earth conductor. The 2220 footprint with 5.7 × 5.0 mm dimensions is large enough to handle the surge-withstand energy that can appear during grid disturbance events.
Recomendado
Class-D Audio Amplifier Output Filter
In Class-D audio amplifiers the GA355DR7GF472KW01L serves as a Y2-rated line-to-ground safety capacitor on the speaker output, preventing DC offset from reaching the chassis and providing EMI filtering on the PWM-modulated audio signal. The X7R dielectric keeps distortion low across the audio band, and the dual X1/Y2 rating lets the same part be used in both speaker-return and across-line filter positions, simplifying BOM management. The 4.7 nF value is large enough to roll off RF common-mode noise above the audio band without affecting audio frequency response.
Recomendado
EV Charging Module Primary-Side Filter
Inside EV charging modules (Mode 2 / Mode 3 in-cable control boxes and on-board chargers) the GA355DR7GF472KW01L provides IEC 61851-compliant safety filtering on the AC input side. The dual X1/Y2 rating gives designers a single BOM line for both across-line and line-to-earth positions, while the 250 VAC continuous rating covers 230 V single-phase charging with margin. With a 4.7 nF capacitance and >20 dB insertion loss from 1-100 MHz, the part attenuates the high-frequency noise that would otherwise couple back into the AC mains from the high-power switching converter.
Recomendado
Induction Cooktop Line Filter
The GA355DR7GF472KW01L is used across the AC input and from line-to-ground in induction cooktop power boards, where the 20-50 kHz inverter switching frequency generates substantial common-mode EMI. The 4.7 nF capacitance in a 2220 case provides a low-impedance path for common-mode currents above 1 MHz, while the X1/Y2 dual rating simplifies the BOM by allowing one part number to cover both safety-capacitor positions. The X7R dielectric retains capacitance across the cooktop's wide temperature swings from cold-start to pan-heating steady state.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para GA355DR7GF472KW01L — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | GA355DR7GF472KW01K | GA355QR7GB472KW01L | GA355ER7GF472KW01L | CD12-E2GA222MY2S | VY2222M35Y5US6UV7 | B32D7ABY5H5V |
|---|---|---|---|---|---|---|---|
| Package | 2220 (5750 metric) | 2220 (5750 metric) - same | 2220 (5750 metric) - same | 2220 (5750 metric) - same | 2220 (5750 metric) - same | 2220 (5750 metric) - same | 2220 (5750 metric) - same |
| Brand | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | TDK | Vishay Intertechnology | KEMET |
| Capacitance | 4700 pF (4.7 nF) | 4700 pF | 4700 pF | 4700 pF | 4700 pF | 4700 pF | 4700 pF |
| Capacitance Tolerance | ±10% | ±10% | ±10% | ±10% | ±20% | ±20% | ±10% |
| Working Voltage (AC) | 250 VAC | 250 VAC | 250 VAC | 250 VAC | 250 VAC | 250 VAC | 250 VAC |
| Safety Class | X1 / Y2 (IEC 60384-14) | X1 / Y2 | X1 / Y2 | X1 / Y2 | X1 / Y2 | X1 / Y2 | X1 / Y2 |
| Dielectric | X7R | X7R | X7R | X7R (ER7 grade) | X7R (B-type) | X7R (Y5U code) | X7R |
| Unit Price (qty 1) | $0.88 | ~$0.88 | ~$0.95 | ~$0.90 | ~$0.95 | ~$0.92 | ~$0.85 |
Diferenciadores clave
- Dual X1/Y2 rating on a single part number (frente a TDK CD12-E2GA222MY2S)
- Wider safety-impulse withstand margin (frente a Vishay VY2222M35Y5US6UV7)
- X7R dielectric retention at -55 °C (frente a KEMET B32D7ABY5H5V)
Notas de diseño
For Y2 line-to-ground placement, maintain at least 5 mm creepage and clearance between the capacitor body and any conductor that could contact hazardous voltage, per IEC 60384-14. Use IPC-7351 nominal-density land pattern with 5.7 × 5.0 mm pads; do not reduce pad size for hand-rework as this can crack the ceramic body during thermal cycling. Place the safety capacitor close to the AC-line entry terminals to maximize EMI-suppression effectiveness.
Do not substitute a non-safety-rated X7R MLCC for the GA355DR7GF472KW01L in AC-line positions, even if the capacitance and voltage ratings appear to match. Non-safety parts are not impulse-tested to 4 kV and will fail catastrophically during a surge event, creating a fire or shock hazard. Always verify the IEC 60384-14 X1/Y2 marking on the part and its datasheet before use in primary-side filtering.
Estimate: at 1 MHz and 250 VAC the GA355DR7GF472KW01L dissipates less than 50 mW, so self-heating is negligible. However, in reflow soldering the 2220 case experiences more thermal stress than smaller MLCCs; preheat to 150 °C for 60-90 s and limit the time above 220 °C to 60 s to avoid thermal-shock cracking. MSL-1 floor life is unlimited, but sealed-bag dry-pack storage is still recommended after long shelf periods.
Información de cumplimiento
RoHS and REACH compliant per Murata product page. Not AEC-Q100 qualified (this is a passive AC-line component, AEC-Q100 is not typically applied to safety capacitors; refer to AEC-Q200 for passive-component automotive qualification if required).
