# MPB/CBB21B Series Box-Type Metallized Polypropylene Film Capacitors

> General-purpose boxed metallized polypropylene film capacitors for DC, AC and pulse circuits. Rated 100–630 VDC, 0.01–10 µF.

- Series code: MPB/CBB21B
- Product line: [Film capacitors](https://www.songtian-ste.com/en/products/film-capacitors/) › Polypropylene film capacitors
- Part numbers: 668 · [part list (JSON)](https://www.songtian-ste.com/data/parts/mpb-cbb21b.json)
- Page: https://www.songtian-ste.com/en/products/film-capacitors/mpb-cbb21b/
- Chinese version: https://www.songtian-ste.com/zh/products/film-capacitors/mpb-cbb21b/
- [Ask AI about this series](https://www.songtian-ste.com/en/products/film-capacitors/mpb-cbb21b/?ask=Help%20me%20choose%20a%20part%20from%20the%20STE%20MPB%2FCBB21B%20series.)

## Key specifications

| Parameter | Value |
| --- | --- |
| Rated voltage | 100 / 250 / 400 / 630 VDC |
| Capacitance | 0.01–10 µF |
| AC application voltage | 63–250 VAC |
| Tolerance | ±5% / ±10% |
| Lead spacing | 7.5–37.5 mm |
| Operating temperature | −40 °C to +105 °C |

## Engineering details

### Overview

Metallized polypropylene film capacitors with a self-healing winding in a resin-sealed plastic box, for DC, AC and pulse circuits. Rated 100, 250, 400 and 630 VDC, 0.010–10 µF, J ±5% or K ±10%. AC application voltages 63–250 VAC, depending on the DC rating. Lead spacing 7.5–37.5 mm. Operating temperature −40 °C to +105 °C. Not an X/Y safety capacitor.

#### Series features

- Self-healing metallized polypropylene winding in a resin-sealed plastic box
- Rated 100, 250, 400 and 630 VDC; 10 nF to 10 µF
- AC application voltages 63–250 VAC, paired with the DC rating; waveform and frequency limits on request
- Dissipation factor tan δ ≤0.1% at 1 kHz

#### Typical applications

- DC filtering, coupling, timing and energy-transfer circuits
- Pulse, commutation and S-correction circuits (dV/dt and peak current on request)
- High-frequency filtering; validate ESR, RMS current, resonance and temperature rise
- AC circuits within the AC application voltages (waveform, frequency and temperature limits on request)

### Specifications

|   |   |
| --- | --- |
| Product type | General-purpose boxed metallized polypropylene film capacitor for DC, AC and pulse circuits |
| Construction | Metallized polypropylene film · self-healing winding · plastic box with resin sealing |
| Rated DC voltage | 100 · 250 · 400 · 630 VDC |
| AC application voltage | 63 VAC at 100 VDC · 160 VAC at 250 VDC · 220 VAC at 400 VDC · 250 VAC at 630 VDC; waveform, frequency and temperature limits on request |
| Capacitance range | 0.010–10 µF, depending on rated voltage and body size |
| Capacitance tolerance | J ±5% · K ±10% |
| Operating temperature | −40 °C to +105 °C |
| Climatic category | 40/100/21; derating between +100 °C and +105 °C on request |
| Storage temperature | +15 °C to +35 °C |
| Dissipation factor | tan δ ≤0.1% at 1 kHz, 1.0 Vrms, 20 °C |
| Insulation resistance | ≥50,000 MΩ at 100 VDC, 60 s, 20 °C |
| Voltage proof, terminal to terminal | 1.6 × UR for 5 s |
| High-frequency characteristics | Low loss at high frequency |
| Safety class | Non-safety product; not an IEC 60384-14 X/Y capacitor. Do not use across the line or line to earth. |
| Body dimensions | W 10–42 · H 8–37 · T 4–22 mm, depending on voltage and capacitance |
| Lead spacing | 7.5 · 10 · 15 · 22.5 · 27.5 · 37.5 mm, ±1.0 mm |
| Lead diameter | 0.6 mm at 7.5 / 10 mm spacing · 0.8 mm at 15–37.5 mm spacing · ±0.05 mm |
| Lead forms and packing | Long straight · inner-bent · straight taped · bent taped |
| Taping | Tape dimensions specified for F = 5 / 7.5 / 10 / 15 / 20–22.5 mm; taping of 27.5 and 37.5 mm parts on request |
| Soldering profile, PP | Preheat ≤110 °C · soldering ≤120 °C · ≤15 s |
| Soldering profile, PE | Preheat ≤125 °C · soldering ≤160 °C · ≤15 s |
| Hand soldering | 350 °C max. · 3 s max. · ≥2 mm from the case and resin seal |
| Reflow soldering | Not permitted; film shrinkage can degrade performance |
| Environmental compliance | RoHS and REACH compliant; bromine-free and halogen-free. Material declarations on request. |
| Further data | On request: impedance, ESR, ESL, resonance, permissible current and temperature rise · dV/dt, peak current, K0, repetitive duty, pulse energy and RMS current · storage humidity and shelf life · endurance, pulse-life, damp-heat, thermal-cycle, vibration and lead-strength test results |

### Variants

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

| Variant | Body dimensions | Rated voltage / capacitance | Construction / tolerance | Lead / land pattern | Notes |
| --- | --- | --- | --- | --- | --- |
| J · 7.5 mm | W 10 · H 8–12 · T 4–6 mm | 100–630 VDC · low values; range depends on rating | Boxed metallized PP · J/K | P 7.5 ±1.0 · d 0.6 ±0.05 mm | Smallest box size. |
| N · 10 mm | W 13 · H 11–14 · T 5–8 mm | 100–630 VDC · range depends on rating | Boxed metallized PP · J/K | P 10 ±1.0 · d 0.6 ±0.05 mm | — |
| Q · 15 mm | W 18 · H 12–21 · T 6–12 mm | 100–630 VDC · range depends on rating | Boxed metallized PP · J/K | P 15 ±1.0 · d 0.8 ±0.05 mm | For pulse or high-frequency duty, request dV/dt, peak and RMS current and temperature-rise data. |
| T · 22.5 mm | W 26.5 · H 19–23 · T 10–13 mm | 100–630 VDC · higher values; range depends on rating | Boxed metallized PP · J/K | P 22.5 ±1.0 · d 0.8 ±0.05 mm | Larger body; check vibration, lead stress and board support. |
| V · 27.5 mm | W 31–32 · H 22–37 · T 13–22 mm | 100–630 VDC · up to 10 µF | Boxed metallized PP · J/K | P 27.5 ±1.0 · d 0.8 ±0.05 mm | High values. |
| 37.5 mm | W 42 · H 30 · T 17 mm | 400 VDC · 6.8 / 10 µF | Boxed metallized PP · J/K | P 37.5 ±1.0 · d 0.8 ±0.05 mm | Largest body; ordering code and packing on request. |

### Selection guide

Start with the waveform and circuit position: MPB/CBB21B is not a safety capacitor, and no frequency or temperature limits are specified for its AC application voltages. Then select voltage and capacitance, and check dV/dt, current, self-heating, lifetime and dimensions for the selected part.

1. **Define circuit position and waveform**
   Exclude any position that requires an IEC 60384-14 X/Y capacitor. Define DC bias, AC ripple, frequency, duty cycle, polarity reversal, start-up and abnormal transients. The paired AC value is not a complete operating rating.
2. **Select voltage and capacitance**
   The series covers 10 nF–10 µF at 100/250/400/630 VDC, with AC application voltages up to 250 VAC. Other ratings, values, lead spacings and tolerances on request.
3. **Calculate pulse and current stress**
   Convert the waveform to dV/dt, Ipk = C·dV/dt, repetitive energy and RMS current. Request the dV/dt, K0, ESR, ESL, impedance, Irms and peak-current limits of the selected part.
4. **Check temperature rise and lifetime**
   Calculate dielectric and ESR losses and hot-spot rise at the actual spectrum and enclosure ambient. The climatic category is 40/100/21 while operation extends to +105 °C: request voltage, frequency and temperature derating, and dry-heat, pulse and humidity life data.
5. **Confirm construction and assembly**
   Match the part number to voltage, capacitance, tolerance, W/H/T, lead spacing, lead form, packing and soldering profile. Do not use reflow soldering; validate cleaning, coating, vibration and lead forming.

### Design notes

#### AC-capable does not mean safety approved

The series has AC application voltages but is a non-safety product. Use an approved X or Y capacitor for across-the-line, line-to-earth or insulation-barrier positions.

#### Do not convert DC ratings to AC

The paired 63–250 VAC values still need waveform, frequency, harmonic, temperature and lifetime conditions. Do not derive AC ratings from DC ratings.

#### Calculate pulse current from the actual waveform

For an ideal capacitor, I = C·dV/dt. Calculate peak and RMS current from the actual edge, overshoot and repetition rate, then apply the dV/dt, K0, Ipk, Irms and temperature limits of the selected part.

#### S-correction is a pulse application

Scan frequency, peak voltage, repetitive pulse current, resonance and case temperature determine the stress. Qualify the part with the exact waveform.

#### Ratings outside the standard range

For voltages, capacitance values or lead spacings outside the standard range, request the part specification, drawing and qualification report. Do not extrapolate from the nearest listed value.

#### Control assembly and mechanical stress

Apply the PP/PE soldering limits to the actual construction and do not use reflow soldering. Support larger boxes, keep lead-forming stress away from the resin seal, and validate cleaning, coating, vibration and thermal cycling.

### Part numbering

Example ordering code. Not every combination is available.

`2B · 2G · 104 · J · N · 1 · B0 · 180 · 145 · 085 · E · S · 0`

| Code | Meaning |
| --- | --- |
| 2B | Series code: MPB/CBB21B |
| 2G | Rated voltage code: 2G = 400 VDC; 2A = 100 VDC, 2E = 250 VDC, 2J = 630 VDC |
| 104 | Capacitance code: 104 = 100 nF |
| J | Capacitance tolerance: J = ±5%, K = ±10% |
| N | Lead spacing: N = 10 mm; J = 7.5, Q = 15, T = 22.5, V = 27.5 mm; 37.5 mm code on request |
| 1 | Lead form: 1 = long straight, 2 = inner-bent, 5 = straight taped, 6 = bent taped |
| B0 | Lead length code: B0 = 20.0 mm |
| 180 | Body width: 180 = 18.0 mm |
| 145 | Body height: 145 = 14.5 mm |
| 085 | Body thickness: 085 = 8.5 mm |
| E | Environmental code: E = RoHS, F = RoHS and halogen-free |
| S | STE internal control code, first field |
| 0 | STE internal control code, second field |

## Datasheets & approval documents

- [Datasheet: MPB/CBB21B series box-type metallized polypropylene (PP) film capacitors — datasheet (2023-10)](https://www.songtian-ste.com/documents/source-en/mpb-cbb21b-datasheet-en-2023-10.pdf) — PDF · English · 2023-10 · 257 KB
- [Datasheet: MPB/CBB21B series box-type metallized polypropylene (PP) film capacitors — short-form datasheet (2023-10)](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/MPP%E8%81%9A%E4%B8%99%E7%83%AF%E8%86%9C%E7%94%B5%E5%AE%B9%E5%99%A8/%E7%9B%92%E5%BC%8F%E9%87%91%E5%B1%9E%E5%8C%96%E8%81%9A%E4%B8%99%E7%83%AF%E8%86%9C%E7%94%B5%E5%AE%B9%E5%99%A8%28MPB%20CBB21B%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-202310.pdf) — PDF · Chinese · 2023-10 · 288 KB
- [Datasheet: MPB/CBB21B-RC series box-type metallized polypropylene (PP) film capacitive-dropper capacitors — short-form datasheet (2023-10)](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/%E9%98%BB%E5%AE%B9%E9%99%8D%E5%8E%8B%E7%B3%BB%E5%88%97/%E7%9B%92%E5%BC%8F%E9%87%91%E5%B1%9E%E5%8C%96%E8%81%9A%E4%B8%99%E7%83%AF%E8%86%9C%E9%98%BB%E5%AE%B9%E9%99%8D%E5%8E%8B%E5%9E%8B%E7%94%B5%E5%AE%B9%E5%99%A8%28MPB%20CBB21B-RC%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-202310.pdf) — PDF · Chinese · 2023-10 · 298 KB

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