# EKWA451ELL121MMN3S

**NCC Nippon Chemi Con** · Aluminum Electrolytic Capacitors - Leaded · CP_Radial_D18.0mm_P7.50mm

EKWA451ELL121MMN3S from NCC Nippon Chemi Con, in a CP_Radial_D18.0mm_P7.50mm. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | Terminal 1 of a POLARISED capacitor (Capacitors / Aluminum Electrolytic Capacitors - Leaded). Which terminal is the anode (+) is not yet recorded on this page: read it from the maker's datasheet before placing. |
| 2 | 2 | passive | Terminal 2 of a POLARISED capacitor (Capacitors / Aluminum Electrolytic Capacitors - Leaded). Which terminal is the anode (+) is not yet recorded on this page: read it from the maker's datasheet before placing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NCC Nippon Chemi Con |
| Package | CP_Radial_D18.0mm_P7.50mm |
| Category | Capacitors |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Temperature Range |  | -40 |  | 105 | ℃ |  | 1 |
| Capacitance tolerance (code M) | C | -20 |  | 20 | % | at 20℃, 120Hz | 1 |
| Dissipation factor (tanδ) max | tanδ |  |  | 0.2 |  | at 20℃, 120Hz | 1 |
| Low temperature impedance ratio Z(-25℃)/Z(+20℃) max, 450V column | Z(-25℃)/Z(+20℃) |  |  | 6 |  | at 120Hz | 1 |
| Endurance capacitance change | ΔC | -20 |  | 20 | % | 5,000 h at 105℃ with rated ripple current and rated DC voltage; restored to 20℃ | 1 |
| Endurance dissipation factor max | tanδ |  |  | 200 | % of initial specified value | 5,000 h at 105℃ with rated ripple current and rated DC voltage; restored to 20℃ | 1 |
| Shelf life capacitance change | ΔC | -20 |  | 20 | % | 1,000 h at 105℃ without voltage applied; restored to 20℃ | 1 |
| Shelf life dissipation factor max | tanδ |  |  | 200 | % of initial specified value | 1,000 h at 105℃ without voltage applied; restored to 20℃ | 1 |
| Shelf life leakage current max |  |  |  | 500 | % of initial specified value | 1,000 h at 105℃ without voltage applied; restored to 20℃ | 1 |
| Rated voltage (MPN voltage code 451) | VR |  | 450 |  | Vdc |  | 1 |
| Nominal capacitance (MPN capacitance code 121) | C |  | 120 |  | µF |  | 2 |
| Rated ripple current | IR |  | 800 |  | mArms | 105℃, 120Hz | 2 |
| Ripple current frequency multiplier, 100 to 120 µF |  |  | 1 |  |  | 120Hz | 2 |
| Ripple current frequency multiplier, 100 to 120 µF |  |  | 1.3 |  |  | 1kHz | 2 |
| Ripple current frequency multiplier, 100 to 120 µF |  |  | 1.4 |  |  | 10kHz | 2 |
| Ripple current frequency multiplier, 100 to 120 µF |  |  | 1.5 |  |  | 100kHz | 2 |

## CAD (KiCad official)

- Symbol: `EKWA451ELL121MMN3S`
- Footprint: `Capacitor_THT:CP_Radial_D18.0mm_P7.50mm`
- 3D model: CP_Radial_D18.0mm_P7.50mm (KiCad packages3D, STEP)
- 3D model files: `ekwa451ell121mmn3s-etched.step` / `ekwa451ell121mmn3s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ekwa451ell121mmn3s.step` / `ekwa451ell121mmn3s.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [NCC Nippon Chemi Con datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603034690248843264) (2 pp, sha256 `c2cfffc59239377b`, retrieved 2026-11-06, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ekwa451ell121mmn3s-datasheet.pdf)