KYOCERA AVX TPS series Molded tantalum capacitor, TPSE687M004R0040, 680 µF ±20%, 4 V, 40 mOhm ESR, 2917 (7343 Metric) E case, -55°C to 125°C, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Molded |
| Series | TPS |
| Mounting | Surface Mount |
| ESR | 40mOhm |
| Voltage - rated | 4 V |
| Operating temperature | -55°C ~ 125°C |
| Size (Dimension) | 0.287\" L x 0.169\" W (7.30mm x 4.30mm) |
| Height - seated | 0.169\" (4.30mm) |
| Package | Tape & Reel (TR) |
| Features | General Purpose |
| Tolerance | ±20% |
| Capacitance | 680 µF |
| Case | 2917 (7343 Metric) |
| Manufacturer size code | E |
The TPSE687M004R0040: This ESR figure is the spec that governs ripple current handling — at 40 mOhm, the capacitor can absorb and dissipate the AC ripple from a switching regulator output without excessive self-heating. The 680 µF capacitance provides enough bulk storage to hold up a 3.3 V rail through a load transient of several amps for tens of microseconds.
The ESR is 40 mOhm. This is the key parameter for a bulk tantalum used on a power rail — it determines how much AC ripple current the capacitor can handle before the internal temperature rise exceeds the derating curve. At 40 mOhm, this part suits output filtering on low-voltage DC-DC converters where ripple current is in the 1-2 A range.
It uses the 2917 (7343 Metric) surface-mount package with manufacturer size code E.