MLCC GRM31A5C2J121JW01D

What is GRM31A5C2J121JW01D MLCC?

The GRM31A5C2J121JW01D is a high-voltage SMD capacitor manufactured by Murata. Key specs include 120pF capacitance, 630V voltage rating, C0G/NP0 dielectric, 1206 package size, and ±5% tolerance. RoHS compliant, it is designed for stable, high-reliability filtering and decoupling.

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

Typical Applications & Why This Part Fits

• Power Supply Output Filtering: The 630V rating and C0G/NP0 stability ensure consistent performance in high-voltage DC-DC converters and AC-DC rectifier stages.
• Snubber Circuits: 120pF ±5% provides precise capacitance for RC snubbers in switching converters, reducing voltage spikes without thermal drift.
• Industrial Sensor Interfaces: The 1206 footprint and low-loss C0G dielectric maintain signal integrity in high-impedance analog front ends exposed to transient voltages.

Key Features & Advantages

• High Voltage Capability: 630V rating exceeds typical 1206 MLCC limits, enabling use in 400V bus rail applications without derating concerns.
• Ultra-Stable Dielectric: C0G/NP0 ensures near-zero capacitance change over temperature, voltage, and time—critical for timing and resonant circuits.
• Tight Tolerance: ±5% tolerance guarantees consistent performance across batches, simplifying production calibration and reducing design margins.

Frequently Asked Questions

1. Q: What makes GRM31A5C2J121JW01D different from a standard X7R capacitor?
   A: Its C0G/NP0 dielectric provides <1% capacitance drift over -55°C to +125°C, whereas X7R may vary by ±15%. This part also handles 630V, far above typical X7R 1206 voltage ratings.
2. Q: Is GRM31A5C2J121JW01D 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 with flexible quantity splits.

Cross Reference & Alternative Sourcing

While GRM31A5C2J121JW01D is our primary recommendation, comparable alternatives are available. We provide comprehensive BOM Kitting service.