GRM31A5C2J391JW01D Murata Electronics Capacitor (Other) In Stock
Murata GRM31A5C2J391JW01D is a 390 pF, 630 V ceramic MLCC capacitor in a 1206 SMD package with C0G/NP0-class C5C dielectric, offering stable capacitance for high-voltage filtering and coupling applications.
- Manufacturer
- Murata Electronics
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- GRM31A5C2J391JW01D Datasheet PDF
- Category
- Capacitor
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 390 pF capacitance at 630 V rating provides reliable high-voltage filtering in power conversion snubbers and HV coupling networks
- 1206 SMD footprint with 1 mm height allows automated placement alongside standard components on mixed high-voltage/signal PCB assemblies
- RoHS and REACH compliant (JESD-609 code e3) ceramic dielectric ensures stable capacitance over temperature for precision high-voltage timing and filtering circuits
Applications
The GRM31A5C2J391JW01D is used in switch-mode power supply snubber networks, high-voltage pulse-width modulation filter stages, and ESD/EMI suppression networks where a compact 1206 ceramic capacitor must block voltages up to 630 V while maintaining stable 390 pF capacitance. Its surface-mount form factor also suits medical imaging equipment and industrial inverters that combine high-voltage bus decoupling with dense SMT layouts.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 16Weeks |
| YTEOL | 7 |
| Capacitance | 0.00039 µF |
| Capacitor Type | CERAMIC CAPACITOR |
| Dielectric Material | CERAMIC |
| Height | 1mm |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Multilayer | YES |
| Negative Tolerance | 5% |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Packing Method | 180mm Reel W8P4 |
| Positive Tolerance | 5% |
| Rated (DC) Voltage (URdc) | 630V |
| Size Code | 3216M/1206 |
| Surface Mount | YES |
| Temperature Characteristics Code | C0G |
| Temperature Coefficient | 30ppm/Cel ppm/°C |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8532.24.00.20 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the capacitance and voltage rating of the Murata GRM31A5C2J391JW01D?
The GRM31A5C2J391JW01D is rated at 390 pF capacitance with a 630 V maximum working voltage, making it one of the higher-voltage 1206-size ceramic capacitors available. This combination suits snubber and clamping positions in flyback converters and half-bridge inverters where high-frequency transients exceed 400 V peak.
In which high-voltage circuit positions is the GRM31A5C2J391JW01D most effective?
This 390 pF, 630 V MLCC is well suited as an RC snubber capacitor across rectifier diodes in offline power supplies, as a bypass capacitor on the high-side MOSFET gate drive rail of a 400 V bus converter, and as an AC coupling element between high-voltage sensor front-ends operating above 200 V where standard 100 V ceramic capacitors would fail.
How does the 1206 SMD package of the GRM31A5C2J391JW01D affect high-voltage PCB layout requirements?
The 1206 package (3.2 mm x 1.6 mm, 1 mm height) provides larger electrode spacing than 0402 or 0603 alternatives, increasing creepage and clearance naturally on the PCB surface. For 630 V applications, IPC-2221 requires at least 0.6 mm external clearance between pads, and the 1206 footprint typically achieves this with standard pad-to-pad spacing, simplifying compliance with IEC 60950 and UL 60950 safety standards.
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