MLCC GRM31A7U3A331JW31D

What is GRM31A7U3A331JW31D MLCC?

The GRM31A7U3A331JW31D is a high-voltage SMD capacitor manufactured by Murata. Key specs include 330pF capacitance, 1kV DC rating, U2J dielectric, 1206 case size, and ±5% tolerance. RoHS compliant, it is designed for stable high-voltage filtering and coupling in power management circuits.

✔ RoHS Compliant  /  ✔ SMD  /  ✔ Murata Quality  /  ✔ Long-Term Supply

Typical Applications & Why This Part Fits

• DC-DC converter snubber networks: The 1kV voltage rating and U2J (low ESR, stable temperature coefficient) ensure reliable spike suppression in high-potential rails.
• RF decoupling in base stations: 330pF value offers low-impedance bypass at UHF frequencies, while ±5% tolerance guarantees consistent performance across batches.
• Automotive onboard charger resonant tanks: Murata’s construction withstands high ripple currents; the 1206 footprint fits compact layouts without compromising creepage distance.

Key Features & Advantages

• High voltage rating (1kV): Enables direct connection to 400V–800V bus voltages common in industrial and EV power stages.
• U2J dielectric (C0G-like stability): Maintains capacitance within ±7.5% over –55°C to +125°C, ideal for timing and filter circuits.
• Tight ±5% tolerance: Reduces design margin requirements for precision resonant controllers and matching networks.

Frequently Asked Questions

1. Q: What makes GRM31A7U3A331JW31D different from a standard X7R MLCC?
   A: U2J offers much better capacitance stability (essentially flat vs. voltage) than X7R, making it suitable for RF and timing applications where X7R’s DC bias loss would cause detuning.
2. Q: Is GRM31A7U3A331JW31D RoHS compliant?
   A: Yes, as a Murata product, it is standardly RoHS compliant and lead-free.
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.

Cross Reference & Alternative Sourcing

While GRM31A7U3A331JW31D is our primary recommendation, comparable alternatives are available. We provide comprehensive BOM Kitting service.