Description
FIXED IND 680UH 50MA 40 OHM SMD
Specifications
Parameter Guide
Understand the key electrical and mechanical specifications for PM40-681K.
PM40-681K has an inductance value of 680 µH. This value indicates how much magnetic energy the component can store and is one of the first parameters to compare when selecting an inductor.
PM40-681K is rated for 50 mA. Current rating helps determine whether the part can carry the expected DC or RMS current without excessive heating or saturation risk.
PM40-681K lists a DC resistance of 40Ohm Max. Lower DCR usually reduces conduction loss and improves efficiency in power circuits.
PM40-681K uses a package or case of 1812 (4532 Metric). Package size affects PCB footprint, height clearance, thermal behavior, and compatibility with automated assembly.
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Product Attributes
| Inductance | 680 µH |
| Tolerance | ±10% |
| Current Rating | 50 mA |
| DC Resistance (DCR) | 40Ohm Max |
| Operating Temperature | -55°C ~ 125°C |
| Dimensions | 0.177" L x 0.126" W (4.50mm x 3.20mm) |
| Case / Size | 1812 (4532 Metric) |
| Package / Case | 1812 (4532 Metric) |
| Supplier | Bourns Inc. |
| Description | FIXED IND 680UH 50MA 40 OHM SMD |
| Series | PM40 |
| Product Status | Obsolete |
| Type / Construction | Molded |
| Core Material | Ferrite |
| Shielding | Unshielded |
| Q @ Frequency | 30 @ 796kHz |
| Self Resonant Frequency | 2MHz |
| Inductance Test Frequency | 796 kHz |
| Mounting Type | Surface Mount |
| Supplier Device Package | 1812 |
| Height - Seated (Max) | 0.126" (3.20mm) |
