# MC3D Series Metallized Polypropylene DC-Link Film Capacitors

> Boxed metallized polypropylene DC-link film capacitors for DC-bus filtering and energy storage in converters. 500–1,200 VDC, 2–180 µF, −40 °C to +105 °C.

- Series code: MC3D
- Product line: [Film capacitors](https://www.songtian-ste.com/en/products/film-capacitors/) › DC-Link capacitors
- Part numbers: 20 · [part list (JSON)](https://www.songtian-ste.com/data/parts/mc3d-dc-link.json)
- Page: https://www.songtian-ste.com/en/products/film-capacitors/mc3d-dc-link/
- Chinese version: https://www.songtian-ste.com/zh/products/film-capacitors/mc3d-dc-link/
- [Ask AI about this series](https://www.songtian-ste.com/en/products/film-capacitors/mc3d-dc-link/?ask=Help%20me%20choose%20a%20part%20from%20the%20STE%20MC3D%20series.)

## Key specifications

| Parameter | Value |
| --- | --- |
| Rated voltage | 500–1,200 VDC |
| Capacitance | 2–180 µF |
| Tolerance | ±5% / ±10% |
| Operating temperature | −40 °C to +105 °C |
| Lead pitch | 27.5 / 37.5 / 52.5 mm |
| Dissipation factor | tan δ ≤0.2% at 1 kHz |

## Engineering details

### Overview

Boxed metallized polypropylene DC-link film capacitors with self-healing construction for DC-bus filtering and energy storage in converters, industrial power supplies and renewable-energy inverters. Rated 500–1,200 VDC; 2–180 µF, maximum value depending on voltage; tolerance ±5% or ±10%. Operating temperature −40 °C to +105 °C, voltage derating above +85 °C. Lead pitch 27.5, 37.5 or 52.5 mm; two- or four-pin PCB mounting.

#### Series features

- Self-healing metallized polypropylene construction for DC filtering
- Rated 500–1,200 VDC, 2–180 µF, lead pitch 27.5, 37.5 or 52.5 mm
- Two- and four-pin PCB versions; other terminal styles on request
- Operating temperature −40 °C to +105 °C; voltage derating above +85 °C

#### Typical applications

- DC-link filtering and energy storage in industrial inverters and variable-frequency drives
- Solar, wind and energy-storage converters; validate ripple current, humidity and mission life first
- Power supplies and DC/DC converters; verify bus transients, ESR and thermal design first
- Power-conversion assemblies with two- or four-pin PCB mounting; validate vibration and mechanical support first

### Specifications

|   |   |
| --- | --- |
| Component function | PCB-mount metallized polypropylene DC-link capacitor for DC filtering and energy storage · not an X/Y safety capacitor · not for reflow soldering |
| Construction | Metallized polypropylene film · self-healing · plastic box encapsulation |
| Standards and approvals | No IEC 61071, IEC 60384, AEC-Q200 or agency approval is specified for this series; qualification data on request |
| Rated DC voltage | 500 · 600 · 800 · 900 · 1,000 · 1,200 VDC |
| Capacitance range | 2–180 µF · J ±5% or K ±10%; the maximum value depends on rated voltage |
| Maximum capacitance per voltage | 1,200 V: 25 µF · 1,000 V: 70 µF · 800/900 V: 95 µF · 600 V: 110 µF · 500 V: 180 µF |
| Stored energy | E = ½CV²; 22.5 J at 180 µF / 500 V and 18 J at 25 µF / 1,200 V. Provide discharge and touch protection in the equipment. |
| Capacitance tolerance | ±5% (J) · ±10% (K) |
| Operating temperature | −40 °C to +105 °C |
| Voltage derating | VRDC reduced by 1.25 percentage points per °C from +85 °C to +105 °C; derating curve and hot-spot definition on request |
| Climatic category | 40/85/56; does not define humidity performance under DC bias (THB) |
| Dissipation factor | tan δ ≤0.2% at 1 kHz, 1.0 Vrms, 20 °C |
| Insulation resistance | ≥10,000 MΩ at 100 VDC, 60 s, 20 °C |
| Voltage proof, terminal to terminal | 1.5 × UR, 10 s |
| Lead pitch | V 27.5 · L 37.5 · I 52.5 mm; pitch depends on rated voltage and capacitance |
| Body dimensions | W 31–58 · H 20–65 · T 11–45 mm, ±0.5 mm; case depends on rated voltage and capacitance |
| Lead diameter | 0.8 / 1.0 / 1.2 mm ±0.05 mm, by case and pitch |
| Terminal styles | E single terminal · F double terminal · K upright screw terminal · M four-pin lead. Datasheet drawings cover two- and four-pin PCB versions; drawings for other styles on request. |
| Lead length | Cut to customer requirement · ±0.5 mm for 5–9 mm · ±1.0 mm for 10–20 mm |
| Case material | Plastic case |
| Hand soldering / rework | Iron ≤350 °C · ≤3 s · ≥2 mm from the case |
| Reflow soldering | Not permitted; wave-soldering profile on request |
| Storage | ≤35 °C · ≤70% RH · unopened original package · max. 12 months |
| Storage atmosphere | Protect terminals from hydrogen chloride, hydrogen sulfide and sulfurous atmospheres, which can degrade solderability |
| Further data | On request: metallization and internal construction · permissible Irms versus frequency and ambient temperature, ripple-voltage limit and temperature-rise criterion · ESR, tan δ versus frequency, thermal resistance, hot-spot location and self-heating limit · dV/dt, peak current, pulse energy, short-circuit and failure-mode data · ESL, impedance curve and self-resonant frequency, two-pin versus four-pin · expected life versus voltage, hot-spot temperature and ripple current, FIT rate and end-of-life criteria · THB, damp-heat, altitude, corrosion, thermal-cycling and salt-mist data · mass, board-retention, vibration, lead-current-sharing and torque data · flammability rating and material declarations · loaded-life, ripple-endurance, surge, self-healing, shock, lead-strength, soldering and flame test data |

### Variants

Ranges by dielectric, package and lead style within this series.

| Variant | Body dimensions | Rated voltage / capacitance | Dielectric / tolerance / package | Lead / land pattern | Notes |
| --- | --- | --- | --- | --- | --- |
| V · 27.5 mm | W 31–32 · H 20–37 · T 11–22 mm | 500–1,200 VDC · lower-energy values | Metallized PP · J/K · boxed DC-link construction | P 27.5 ±1.0 · d 0.8–1.0 ±0.05 mm | Compact PCB case. Do not extrapolate Irms, ESR, thermal or life data from case size. |
| L · 37.5 mm | W 41.5 · H 28–55 · T 14–40 mm | 500–1,200 VDC · medium-energy values | Metallized PP · J/K · two- or four-pin | P 37.5 ±1.0 · d 1.0–1.2 ±0.05 mm | Medium current and energy. Terminal layout, support and current sharing per the part drawing. |
| I · 52.5 mm | W 58 · H 43.5–65 · T 29.5–45 mm | 500–1,200 VDC · higher-energy values; 500 V reaches 180 µF | Metallized PP · J/K · two- or four-pin | P 52.5 ±1.0 · d 1.0–1.2 ±0.05 mm | Highest energy. Validate board support, discharge, Irms, hot spot, vibration and life in the application. |

### Selection guide

Start with the converter mission profile, not only bus voltage and capacitance. Coordinate steady-state and transient voltage, stored energy, ripple spectrum, ESR/ESL, hot-spot temperature, cooling, humidity, altitude, lifetime, discharge safety and two- or four-pin mechanics.

1. **Define bus, ripple and mission profile**
   Define nominal and maximum DC bus voltage, switching and low-frequency ripple spectra, regenerative or fault overvoltage, precharge and discharge behavior, ambient temperature and cooling, altitude, humidity, vibration and the lifetime histogram.
2. **Select a voltage and capacitance combination**
   Select from the voltage/capacitance table in the datasheet and observe the maximum capacitance at each voltage. The 2–180 µF series range does not apply at every voltage.
3. **Calculate current, loss and hot spot**
   Calculate harmonic Irms and energy E = ½CV², and check them against the part's ESR versus frequency and temperature, ESL and resonance, Irms, ripple-voltage, terminal-current, Rth, hot-spot and self-heating limits (on request).
4. **Apply voltage derating and a life model**
   Apply the voltage derating above +85 °C and a life model based on voltage, hot spot, ripple, humidity and altitude. THB, loaded and ripple life, FIT rate and end-of-life criteria for the mission profile on request.
5. **Specify terminals, safety and assembly**
   Specify W/H/T, pitch, two- or four-pin layout, lead diameter and length, packing and marking for the part number. Define discharge and touch protection, creepage and clearance, mechanical support, wave soldering, cleaning, coating and vibration acceptance.

### Approvals & reliability

#### Reliability tests

Initial dissipation factor, insulation resistance and voltage proof are specified, together with voltage derating and dimension tables. ESR, ESL, ripple-current, thermal, THB and lifetime data on request.

| Test | Condition | Acceptance |
| --- | --- | --- |
| Initial characteristics | tan δ ≤0.2% at 1 kHz / 1 Vrms / 20 °C; IR ≥10 GΩ at 100 VDC / 60 s / 20 °C | Measurement details on request |
| Voltage proof, terminal to terminal | 1.5 × UR, 10 s | Ramp, trip current and post-test ΔC, tan δ, IR and visual criteria on request |

### Design notes

#### Design from ripple spectrum and hot spot

DC-link voltage alone does not select the part. Sum harmonic currents using part-level ESR, include terminal current and cooling, and verify the measured hot spot against the life model for the part.

#### Account for stored energy and the discharge path

Use E = ½CV² for every operating and fault condition. Define precharge, bleeder or discharge, residual voltage, service isolation and short-circuit protection outside the capacitor.

#### Maximum capacitance depends on voltage

The series reaches 180 µF only at 500 V; at 1,200 V the maximum is 25 µF. Select from the voltage/capacitance table.

#### Treat humidity and life as selection parameters

For solar, wind, storage and industrial service, request THB data with applied bias, a voltage, hot-spot and ripple life model, and post-test capacitance, ESR/loss, IR and visual limits.

#### Minimize loop inductance

Two- and four-pin versions can differ in ESL and current sharing. Use the terminal drawing and impedance data for the part; keep busbar and PCB commutation loops short and symmetric.

#### Support the case and control solder heat

Large cases need mechanical restraint and vibration validation. Do not reflow-solder; use the wave- or hand-soldering profile specified for the part, and validate cleaning, coating, lead stress and thermal cycling.

### Part numbering

Example ordering code. Not every combination is available.

`3D · 2K · 106 · J · L · M · B0 · 420 · 450 · 220 · E · V · T`

| Code | Meaning |
| --- | --- |
| 3D | MC3D PCB-mount DC-link series code |
| 2K | Rated voltage: 2K = 800 VDC; 1X = 900, 2H = 500 VDC; other voltage codes on request. |
| 106 | Capacitance code: 106 = 10 µF; 105 = 1 µF, 107 = 100 µF |
| J | Capacitance tolerance: J = ±5%; K = ±10% |
| L | Lead pitch: L = 37.5 mm; V = 27.5, I = 52.5 mm |
| M | Terminal style: M = four-pin lead; E = single terminal, F = double terminal, K = upright screw terminal (drawings on request) |
| B0 | Lead length: B0 = 20.0 mm |
| 420 | Body width: 420 = 42.0 mm |
| 450 | Body height: 450 = 45.0 mm |
| 220 | Body thickness: 220 = 22.0 mm |
| E | Environmental: E = RoHS; F = RoHS + halogen-free |
| V | STE internal management code |
| T | STE internal management code |

## Datasheets & approval documents

- [Technical document: Box-type metallized film DC-link capacitors (2022-05)](https://www.songtian-ste.com/documents/source-cn/%E9%87%91%E5%B1%9E%E8%86%9C%E7%94%B5%E5%AE%B9%E5%99%A8%E7%B3%BB%E5%88%97%E4%BA%A7%E5%93%81%E8%A7%84%E6%A0%BC%E4%B9%A6/DC-Link/%E7%9B%92%E5%BC%8F%E9%87%91%E5%B1%9E%E5%8C%96%E8%86%9C%E7%9B%B4%E6%B5%81%E6%94%AF%E6%92%91%E7%94%B5%E5%AE%B9%E5%99%A8%20%EF%BC%88DC-Link%EF%BC%8920220517%E6%9B%B4%E6%96%B0.pdf) — PDF · Chinese · 2022-05 · 255 KB

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