SMP253 - Y2 250VAC Class Metallized Paper EMI Suppression SMD | KEMET
Teilenummer: SMP253 250VAC ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.21 | $121,00 |
| 500 | $0.95 | $475,00 |
| 1.000 | $0.78 | $780,00 |
SMP253 250VAC Übersicht
An EMI suppression capacitor (also called a safety capacitor or Y-rated capacitor) is a passive component specifically designed to filter electromagnetic interference on AC mains lines while providing reinforced isolation to protect users from electric shock. Y2-class capacitors in particular are safety-certified for connection between line and earth ground in equipment where failure of the capacitor could not lead to a hazardous electric shock, but where double or reinforced insulation is required. The hierarchy is: capacitor -> film/paper capacitor -> safety capacitor -> Y2 EMI suppression capacitor. Y2 capacitors must pass certified endurance, voltage, and impulse tests per IEC 60384-14.
Key differentiating features of the SMP253 include its metallized paper dielectric (versus the more common metallized polypropylene), which provides self-healing behavior and stable capacitance under AC voltage stress. The SMD form factor eliminates the lead wires that typically introduce parasitic inductance in through-hole Y2 capacitors, improving high-frequency filtering performance. A flame-retardant epoxy case rated UL 94 V-0 ensures the part meets safety agency flammability requirements. The series is qualified for automotive-grade applications under the AEC-Q200 stress test standard.
Typical applications for the SMP253 include AC line filtering in switch-mode power supplies (SMPS), input EMI filters for industrial motor drives, Y-capacitor placement across isolation barriers in offline LED drivers, USB-PD adapters, and Class II consumer appliances requiring reinforced insulation. The SMD package is particularly valuable in high-volume automated assembly where through-hole safety capacitors would require additional wave-soldering steps.
A key design consideration is that Y2 capacitors must be placed only in circuits where the available fault current and transient overvoltages are bounded per IEC 60384-14. Designers should leave adequate creepage and clearance on the PCB and never replace a Y2 capacitor with a non-safety-rated capacitor even if the capacitance and voltage appear to match. For 250VAC continuous operation, the SMP253 is the appropriate selection, while the 300VAC variant is preferred in regions with higher nominal mains voltage.
Drop-in-Alternativen für SMP253 250VAC – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SMP253MA4250MTR24
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SMP253FA4470MB31TV24
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SMP253MA4470MTR24
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SMP253 300VAC
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
F863 Series
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SMP253 250VAC Grenzwerte & elektrische Eigenschaften
| Capacitor Type | EMI Suppression, Safety (Class Y2) |
| Dielectric | Impregnated Metallized Paper |
| Rated AC Voltage | 250 VAC |
| Maximum Continuous AC Voltage (variant) | 300 VAC |
| Rated DC Voltage (Dielectric Withstand) | 1500 VDC (1.5 kV) |
| Capacitance Range | 1000 pF to 47000 pF (suffix dependent) |
| Safety Class | Y2 per IEC 60384-14 |
| Montageart | Surface Mount (SMD) |
| Package Case Material | Epoxy resin, UL 94 V-0 flame retardant |
| Termination Style | SMD solder pads |
| Automotive Grade | AEC-Q200 qualified |
| RoHS Compliance | Compliant per KEMET product page |
| Self-Healing | Yes (metallized paper dielectric) |
SMP253 250VAC epoxy resin, ul 94 v-0 flame retardant Pinbelegungsleitfaden
Pinbelegung für SMP253 250VAC (epoxy resin, ul 94 v-0 flame retardant-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für SMP253 250VAC.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
SMP253 250VAC ist geeignet für 6 Anwendungs: AC Line EMI Filter for Switch-Mode Power Supplies, USB-PD Adapter Input Filtering, Class II Appliance Reinforced Insulation, Industrial Motor Drive EMI Filtering, LED Driver Primary-Side Y-Capacitor, Automotive 12V / 48V Bus EMI Suppression.
AC Line EMI Filter for Switch-Mode Power Supplies
The SMP253 250VAC is placed between line and earth ground at the AC input stage of offline SMPS to suppress common-mode EMI while providing reinforced insulation per IEC 60384-14 Y2. Its 250 VAC continuous rating covers 230 V nominal mains with margin, and the 1500 VDC dielectric withstand handles typical line transients. The SMD package eliminates the lead-wire parasitic inductance of through-hole Y2 capacitors, extending useful filtering into the 30-100 MHz range where conducted emissions testing is most stringent. Designers pair the SMP253 with an X2 capacitor for line-to-line filtering and a common-mode choke for differential-mode rejection.
Empfohlen
USB-PD Adapter Input Filtering
USB-PD adapters operating from universal mains (100-240 VAC) require compact, low-profile Y2 capacitors for primary-to-secondary EMI filtering. The SMP253 250VAC's SMD footprint saves PCB area compared to through-hole Y2 parts, enabling the slimmer adapter form factors demanded by laptop OEMs. Its metallized paper dielectric provides self-healing under voltage stress events, and the AEC-Q200 qualification gives an extra margin of reliability for adapters that share thermal environments with high-power GaN or SiC primary switches.
Empfohlen
Class II Appliance Reinforced Insulation
Class II consumer appliances (double-insulated, no protective earth) require Y2 capacitors across the reinforced insulation barrier to suppress EMI while maintaining user-touch safety. The SMP253 250VAC meets IEC 60384-14 Y2 reinforced-insulation requirements with its 1500 VDC dielectric withstand, and its UL 94 V-0 epoxy case meets flammability standards. The SMD package supports fully automated SMT assembly lines used in hair-dryer, blender, and power-tool manufacturing where high-volume throughput is critical.
Empfohlen
Industrial Motor Drive EMI Filtering
Industrial motor drives operating from 230/400 VAC three-phase mains require robust Y2 capacitors on the line side for EMC compliance with IEC 61800-3. The SMP253 250VAC 300 VAC variant is used at the input rectifier to attenuate common-mode EMI, and its AEC-Q200 automotive-grade qualification translates into high reliability for industrial temperature ranges. The SMD package, when used with conformal coating, supports the harsh vibration and thermal-cycling profiles of motor-drive cabinets deployed in factory automation.
Empfohlen
LED Driver Primary-Side Y-Capacitor
Offline LED drivers for commercial and industrial luminaires place a Y2 capacitor between the primary high-voltage bus and the secondary driver ground for EMI suppression and reinforced insulation. The SMP253 250VAC's 1000-47000 pF capacitance range covers typical 1-10 nF Y-capacitor values used in 25-200 W LED drivers. The SMD form factor enables the slim driver enclosures preferred by linear-LED-fixture OEMs, while the metallized paper dielectric's self-healing provides long-term reliability under the LED driver's continuous-operation duty cycle.
Empfohlen
Automotive 12V / 48V Bus EMI Suppression
Automotive 12V and emerging 48V bus systems require Y-rated capacitors for EMI filtering across the high-voltage to low-voltage isolation barrier in DC-DC converters and onboard chargers. The SMP253 250VAC's AEC-Q200 qualification makes it directly usable in these designs, where the 250 VAC rating is derated to the DC-bus voltage per IEC 60384-14 annex. The SMD package supports the high-density layouts of modern EV power-electronics modules, and the metallized paper dielectric's self-healing behavior is preferred for the high-transient-voltage automotive environment.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SMP253 250VAC – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SMP253MA4250MTR24 | SMP253FA4470MB31TV24 | SMP253MA4470MTR24 | SMP253 300VAC variant | F863 Series |
|---|---|---|---|---|---|---|
| Brand | KEMET | KEMET | KEMET | KEMET | KEMET | KEMET |
| Package | SMD Nonstandard | SMD Nonstandard - same family | SMD Nonstandard - same family | SMD Nonstandard - same family | SMD Nonstandard - same family | SMD Nonstandard - Y2 family |
| Rated AC Voltage | 250 VAC | 250 VAC | 250 VAC | 250 VAC | 300 VAC | 250 VAC |
| Dielectric Withstand Voltage | 1500 VDC | 1500 VDC | 1500 VDC | 1500 VDC | 1500 VDC | 1500 VDC |
| Dielectric Material | Impregnated Metallized Paper | Impregnated Metallized Paper | Impregnated Metallized Paper | Impregnated Metallized Paper | Impregnated Metallized Paper | Metallized Polypropylene |
| Safety Class | Y2 (IEC 60384-14) | Y2 | Y2 | Y2 | Y2 | Y2 |
| Automotive Grade | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 |
Wichtigste Unterscheidungsmerkmale
- Metallized paper dielectric with self-healing behavior (vs. F863 Series (KEMET polypropylene))
- Surface-mount Y2 package eliminates lead-wire parasitic inductance (vs. Through-hole Y2 capacitors (e.g. R46 series))
- AEC-Q200 automotive qualification standard (vs. Industrial-grade Y2 capacitors)
Designhinweise
Never replace a Y2 safety capacitor with a non-safety-rated capacitor even if the capacitance and voltage ratings appear identical. Y2 capacitors per IEC 60384-14 must pass certified endurance, voltage, impulse, and flame tests. A standard X1/X2/Y1 or non-safety capacitor lacks the reinforced insulation and could fail catastrophically under fault conditions, exposing users to mains voltage. The SMP253 datasheet KEM_F3018 specifies the Y2 approval and must be preserved in any substitution.
Maintain minimum creepage and clearance distances on the PCB around the SMP253 250VAC to preserve reinforced insulation per IEC 60384-14. For 250 VAC Y2 applications, typical minimum creepage on the PCB is 5 mm (pollution degree 2) and minimum clearance is 3 mm, but designers should consult the KEMET datasheet KEM_F3018 'Packaging' section for the exact pad geometry. The SMD land pattern must not route any signal trace or via in the gap between the capacitor pads and any earth-ground or secondary-side copper pour.
Place the SMP253 250VAC as close as practical to the AC input connector or mains entry point to maximize the high-frequency filtering effectiveness before the EMI can propagate into the rest of the circuit. Keep the trace inductance between the AC line/neutral and the SMP253 terminals to a minimum - use wide copper pours rather than thin traces. Place the X2 line-to-line capacitor and common-mode choke physically adjacent to the SMP253 to form a complete pi-filter or L-C-L filter network for best conducted-emissions attenuation per CISPR 32 / EN 55032.
Although safety capacitors generate negligible heat under normal operation, the SMP253 250VAC datasheet KEM_F3018 specifies an operating temperature range that must be respected. In high-power-density SMPS designs, local ambient temperature near the input filter can exceed 85C; verify with thermocouple measurement that the SMP253 case temperature remains within the rated maximum. For designs approaching the upper temperature limit, the 300 VAC variant of the SMP253 family (KEM_F3142) typically shares identical thermal ratings and may offer additional voltage margin without thermal penalty.
Compliance-Informationen
RoHS compliant per KEMET product page; AEC-Q200 automotive qualified (not AEC-Q100, which applies to QIC logic ICs, not passive components). UL 94 V-0 flame-retardant case. Safety certifications per IEC 60384-14 Y2 class.
