GA355DR7GF472KW01L - 4.7nF 250VAC X7R Safety Capacitor | Murata
N.º da peça: GA355DR7GF472KW01L ✓ Ativo| Qtd. | Preço unitário | 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 Visão geral
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 drop-in para GA355DR7GF472KW01L — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
GA355DR7GF472KW01K
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
GA355QR7GB472KW01L
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
GA355ER7GF472KW01L
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
CD12-E2GA222MY2S
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
VY2222M35Y5US6UV7
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
B32D7ABY5H5V
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
GA355DR7GF472KW01L Classificações máximas e características elétricas
| 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) |
| Faixa de temperatura de operação | -55 °C to +125 °C |
| Encapsulamento / Caixa | 2220 (5750 metric) |
| Package Dimensions | 5.7 mm × 5.0 mm |
| Tipo de montagem | Surface Mount (SMD) |
| Safety Class | X1 / Y2 (per IEC 60384-14) |
| Termination Style | Solder coated Ni barrier |
| Packaging | Tape & Reel (suffix L) |
| Nível MSL | 1 (unlimited floor life) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Guia de Configuração de Pinos do GA355DR7GF472KW01L 5.7 mm × 5.0 mm
Configuração de pinos para GA355DR7GF472KW01L (pacote 5.7 mm × 5.0 mm). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para GA355DR7GF472KW01L.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
GA355DR7GF472KW01L é adequado para 6 aplicaçãos: 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
Resumo dos produtos recomendados
Dados de referência de engenharia para GA355DR7GF472KW01L — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Dual X1/Y2 rating on a single part number (vs TDK CD12-E2GA222MY2S)
- Wider safety-impulse withstand margin (vs Vishay VY2222M35Y5US6UV7)
- X7R dielectric retention at -55 °C (vs KEMET B32D7ABY5H5V)
Notas de projeto
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.
Informações de conformidade
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).
