MLCC GRM31A7U2J221JW31D

What is GRM31A7U2J221JW31D MLCC?

The GRM31A7U2J221JW31D is a high-voltage SMD capacitor manufactured by Murata (村田). Key specs include 220pF capacitance, 630V rated voltage, ±5% tolerance, and a U2J dielectric in a 1206 size. RoHS compliant, it is designed for stable filtering and coupling in demanding circuits.

✔ RoHS Compliant  /  ✔ SMD  /  ✔ Murata (村田) Quality  /  ✔ Long-Term Supply

Typical Applications & Why This Part Fits

• DC-DC Converter Snubbers: Its 630V rating and U2J low-loss dielectric ensure reliable damping of high-frequency ringing without excessive heat generation.
• Sensor Coupling: The tight ±5% tolerance and stable temperature characteristics of U2J maintain signal integrity in precision measurement circuits.
• Power Supply Feedback: The 220pF value combined with high voltage capability allows safe AC coupling in feedback loops for offline converters.

Key Features & Advantages

• High Voltage Handling: Rated at 630V, it suits bus voltages up to 400V with ample derating margin for reliability.
• U2J Dielectric: Offers predictable, linear capacitance change over temperature (-55°C to +125°C), unlike X7R or X5R types.
• 1206 Footprint: Provides robust solder joint strength and easy PCB routing while supporting the 630V requirement without excessive size.

Frequently Asked Questions

1. Q: What makes GRM31A7U2J221JW31D different from a standard X7R capacitor?
   A: The U2J dielectric provides a nearly flat temperature coefficient and low voltage coefficient, ensuring stable capacitance across operating conditions—critical for resonant or filter circuits where X7R would drift significantly.
2. Q: Is GRM31A7U2J221JW31D RoHS compliant?
   A: Yes, as a Murata product, it is standardly RoHS compliant and lead-free, meeting current environmental regulations.
3. Q: What is the MOQ? Can we get small batches?
   A: We support small batch orders and full BOM kitting at SZYY, including fast prototyping supply for design validation and emergency shortages.

Cross Reference & Alternative Sourcing

While GRM31A7U2J221JW31D is our primary recommendation, comparable alternatives are available. We provide comprehensive BOM Kitting service to streamline your procurement across multiple line items.