# MPX/X2 Series Metallized Polypropylene Film Interference Suppression Capacitors (Class X2)

> Boxed metallized polypropylene film capacitors for across-the-line EMI suppression, Class X2. Rated 275–350 VAC, 1 nF–10 µF.

- Series code: MPX/X2
- Product line: [Film capacitors](https://www.songtian-ste.com/en/products/film-capacitors/) › EMI suppression capacitors (X1/X2/Y2)
- Approvals: cRUus, VDE, ENEC, CQC
- Part numbers: 2,714 · [part list (JSON)](https://www.songtian-ste.com/data/parts/mpx-x2.json)
- Page: https://www.songtian-ste.com/en/products/film-capacitors/mpx-x2/
- Chinese version: https://www.songtian-ste.com/zh/products/film-capacitors/mpx-x2/
- [Ask AI about this series](https://www.songtian-ste.com/en/products/film-capacitors/mpx-x2/?ask=Help%20me%20choose%20a%20part%20from%20the%20STE%20MPX%2FX2%20series.)

## Key specifications

| Parameter | Value |
| --- | --- |
| Safety class | X2, across-the-line |
| Rated voltage | 275 / 305 / 310 / 330 / 350 VAC |
| Capacitance | 0.001–10 µF |
| Tolerance | ±10% |
| Lead pitch | 7.5–37.5 mm |
| Operating temperature | −40 °C to +110 °C |

## Engineering details

### Overview

Boxed metallized polypropylene film capacitors for across-the-line (L–N) EMI suppression, Class X2 to IEC / EN / UL 60384-14. Rated 275, 305, 310, 330 and 350 VAC; 1 nF–10 µF; tolerance ±10%. Lead pitch 7.5–37.5 mm. Operating temperature −40 °C to +110 °C. Flame-retardant construction to UL 94 V-0.

#### Series features

- Class X2 to IEC / EN / UL 60384-14 for across-the-line (L–N) interference suppression
- Five certified AC ratings: 275, 305, 310, 330 and 350 VAC; capacitance 1 nF–10 µF
- Seven lead pitches from 7.5 to 37.5 mm
- Boxed, resin-encapsulated metallized polypropylene construction; flame-retardant to UL 94 V-0

#### Typical applications

- Differential-mode EMI filtering between line conductors (L–N)
- Mains inputs of power supplies, appliances, metering, lighting and industrial controls

### Specifications

|   |   |
| --- | --- |
| Safety function | Class X2 · across-the-line (L–N) EMI suppression · not for line-to-earth (Y) positions |
| Construction | Metallized polypropylene film · boxed, resin-encapsulated |
| Reference standards | IEC / EN / UL 60384-14 · GB/T 6346.14-2023 · K 60384 |
| Rated AC voltage UR | 275 · 305 · 310 · 330 · 350 VAC |
| Capacitance range | 0.001–10 µF · available values depend on rated voltage, body size and approval scope |
| Capacitance tolerance | ±10% (K) |
| Operating temperature | −40 °C to +110 °C |
| Storage temperature | +15 °C to +35 °C |
| Climatic category / flammability | 40/110/56 · passive flammability category B · resin to UL 94 V-0 |
| Dissipation factor | tan δ ≤0.1% |
| Insulation resistance, CR ≤0.33 µF | ≥15,000 MΩ at 20 °C, 100 VDC, 60 s |
| Insulation resistance, CR >0.33 µF | Time constant ≥5,000 s (T = IR \[MΩ\] × CN \[µF\]) at 20 °C, 100 VDC, 60 s |
| Voltage proof, terminal to terminal | 4.3 × UR DC, 5 s |
| Voltage proof, terminals to case | 2 × UR + 1,500 VAC, min. 2,000 VAC |
| Impulse and self-ignition tests | On request. MPX/X2-THB values do not apply to this series. |
| DC operation | No continuous DC rating. VDE certificate 40034679 includes no Annex H (DC) approval. |
| Humidity robustness | No biased 85/85 humidity test; the VDE approval includes no IEC 60384-14 Annex I humidity grade. For humid environments, see MPX/X2-THB. |
| Body dimensions | W 10–42.5 · H 9–50 · T 4–35 mm, depending on rated voltage and capacitance |
| Lead pitch | 7.5 · 10 · 12.5 · 15 · 22.5 · 27.5 · 37.5 mm |
| Pitch codes | N 10 · Q 15 · T 22.5 · V 27.5 mm · codes for 7.5, 12.5 and 37.5 mm on request |
| Lead diameter | 0.6 mm (pitch 7.5–12.5 mm) · 0.8 mm (15–27.5 mm) · 1.0 mm (37.5 mm) |
| Pitch tolerance | ±0.5 mm |
| Lead and packing forms | Long straight · inner-bent · straight, taped · bent, taped |
| Taped lead spacing F | 7.5 / 10 / 15 / 22.5 mm · F = 5 mm on request |
| Soldering profile, PP | Preheat ≤110 °C · soldering ≤120 °C · ≤15 s |
| Soldering profile, PE | Preheat ≤125 °C · soldering ≤160 °C · ≤15 s |
| Soldering profile selection | PP or PE, depending on the part number; on request |
| Hand soldering / rework | Iron ≤350 °C · ≤3 s · ≥2 mm from the coating |
| Reflow soldering | Not permitted; film shrinkage can degrade performance |
| Environmental compliance | RoHS and REACH compliant · code E = RoHS, F = RoHS + halogen-free |
| Further data | On request: storage humidity and shelf life · tan δ measurement conditions · voltage-proof test duration, terminals to case · endurance · THB · dV/dt · current · ESR · thermal · vibration · lead strength |

### Variants

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

| Variant | Body dimensions | Rated voltage / capacitance | Construction / class | Lead / land pattern | Notes |
| --- | --- | --- | --- | --- | --- |
| 7.5 mm | W 10 · H 9–15 · T 4–8 mm | 275–350 VAC · 0.001–0.033 µF | Metallized PP · X2 · K ±10% | P 7.5 ±0.5 · d 0.6 ±0.05 mm | Smallest body. |
| N · 10 mm | W 13 · H 9–15.5 · T 4–8 mm | 275–350 VAC · 0.001–0.15 µF | Metallized PP · X2 · K ±10% | P 10 ±0.5 · d 0.6 ±0.05 mm | — |
| 12.5 mm | W 15 · H 12.5–15 · T 7–9 mm | 275–350 VAC · 0.15–0.22 µF | Metallized PP · X2 · K ±10% | P 12.5 ±0.5 · d 0.6 ±0.05 mm | — |
| Q · 15 mm | W 18 · H 11–20 · T 5–11 mm | 275–350 VAC · 0.01–0.56 µF | Metallized PP · X2 · K ±10% | P 15 ±0.5 · d 0.8 ±0.05 mm | — |
| T · 22.5 mm | W 26.5 · H 16–22 · T 7–13 mm | 275–350 VAC · 0.15–0.82 µF | Metallized PP · X2 · K ±10% | P 22.5 ±0.5 · d 0.8 ±0.05 mm | For repetitive duty, check RMS current, ESR and hot-spot temperature. |
| V · 27.5 mm | W 31–32 · H 20–37 · T 11–22 mm | 275–310 VAC to 3.9 µF · 330/350 VAC to 3.3 µF | Metallized PP · X2 · K ±10% | P 27.5 ±0.5 · d 0.8 ±0.05 mm | Body size depends on rated voltage and capacitance. |
| 37.5 mm | W 41–42.5 · H 28–50 · T 14–35 mm | 275–350 VAC · 2–10 µF | Metallized PP · X2 · K ±10% | P 37.5 ±0.5 · d 1.0 ±0.05 mm | Verify current and temperature rise at high capacitance values. |

### Selection guide

Start with the circuit position: Class X2 is for suppression between line conductors (L–N), not from line to earth. Then define the approved AC voltage, capacitance, continuous and transient current, hot-spot temperature, humidity profile and dimensions.

1. **Confirm the X2 circuit position**
   Use X2 between line conductors only where the equipment standard and overvoltage category allow Class X2. Do not use it from line to earth or across an isolation barrier in place of a Y capacitor.
2. **Match the AC voltage approval**
   Select 275, 305, 310, 330 or 350 VAC and the approval marks the end equipment needs.
3. **Define transient and discharge duty**
   Define the surge waveform, source impedance, repetition rate and discharge resistor of the equipment, and check them against the X2 impulse, dV/dt, peak-current and self-ignition data.
4. **Set capacitance, losses, current and mission profile**
   Choose capacitance for the required EMI attenuation. Then verify tan δ, RMS and peak current, ESR, self-heating, derating over frequency and temperature, endurance and humidity performance. The X2 rating alone does not qualify the part for dropper or pulse duty.
5. **Specify the mechanical and ordering data**
   Define voltage, capacitance, tolerance, W/H/T, pitch, lead diameter and form, packing and approval for each part number.

### Approvals & reliability

#### Approvals & qualifications

Approvals cover MPX X2 capacitors from 1 nF to 10 µF at 275–350 VAC. The VDE approval includes neither an IEC 60384-14 Annex H (DC) approval nor an Annex I humidity grade.

| Agency | Standard | Certificate | Scope |
| --- | --- | --- | --- |
| CQC CQC | GB/T 6346.14-2023 | CQC19001213200 | MPX X2, 0.001–10 µF, 275/305/310/330/350 VAC, ±10% (K). |
| VDE, ENEC VDE / ENEC | EN 60384-14:2017 | 40034679 | MPX X2, 0.001–10 µF, five AC ratings, ±10% (K), climatic category 40/110/56, passive flammability category B. No Annex H (DC) approval; no Annex I humidity grade. |
| cRUus UL / cUL | UL 60384-14 | E208107 | MPX X2, 0.001–10 µF, 275/305/310/330/350 VAC, ±10%, −40 to +110 °C. |
| KTL, KC KTL / KC | K 60384 | SU03031 family | Certificates SU03031-12001C, -12002C, -12003D, -12004D, -23001 and -23002 cover six capacitance bands up to 10 µF. Certificate copies on request. |

Each certificate covers the types and ratings listed on it.

#### Reliability tests

Initial characteristics are specified for dissipation factor, insulation resistance and voltage proof.

| Test | Condition | Acceptance |
| --- | --- | --- |
| Voltage proof | Terminal to terminal: 4.3 × UR DC, 5 s. Terminals to case: 2 × UR + 1,500 VAC, min. 2,000 VAC | Test duration and pass criteria on request |

### Design notes

#### Use X2 between line conductors

Use for differential-mode suppression where Class X2 meets the equipment standard and overvoltage category. Do not use from line to earth: an X2 capacitor is not a Y capacitor and does not provide reinforced insulation.

#### Voltage rating is not a surge or current rating

The 275–350 VAC rating does not define peak current, dV/dt or surge capability. Check installation category, input transients, repetitive waveforms and the discharge path against the test data of the selected part.

#### Check losses and temperature rise, including dropper duty

Design with tan δ versus frequency and temperature, ESR, RMS and peak current, thermal resistance and voltage derating of the selected part. Validate normal, harmonic, brownout, surge and enclosure-temperature conditions.

#### No THB or DC rating

This series has no biased 85/85 humidity rating and no continuous DC rating; the VDE approval includes neither Annex I nor Annex H. For humid environments, select MPX/X2-THB and design to its own ratings.

#### Assembly

Specify body size, pitch, lead form, packing and soldering profile for each part number. Do not reflow-solder. Validate cleaning, coating and vibration in the application.

### Part numbering

Example ordering code. Not every combination is available.

`X2 · P2 · 104 · K · Q · 1 · B0 · 180 · 120 · 060 · E · S · 0`

| Code | Meaning |
| --- | --- |
| X2 | Safety class X2 (across-the-line) and series |
| P2 | Rated voltage: P2 = 275 VAC; Q2 = 305, Q3 = 310, R1 = 330, R2 = 350 VAC |
| 104 | Capacitance code: 104 = 100 nF |
| K | Capacitance tolerance: K = ±10% |
| Q | Lead pitch: Q = 15 mm; N = 10, T = 22.5, V = 27.5 mm; codes for 7.5, 12.5 and 37.5 mm on request |
| 1 | Lead form: 1 = long straight; 2 = inner-bent, 5 = straight taped, 6 = bent taped |
| B0 | Lead length: B0 = 20.0 mm |
| 180 | Body width: 180 = 18.0 mm |
| 120 | Body height: 120 = 12.0 mm |
| 060 | Body thickness: 060 = 6.0 mm |
| E | Environmental: E = RoHS; F = RoHS + halogen-free |
| S | Case color: S = yellow; E = gray |
| 0 | STE internal management code |

## Datasheets & approval documents

- [Datasheet: MPX/X2 series box-type metallized polypropylene (PP) film EMI suppression capacitors, Class X2 — short-form datasheet (2024-04)](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/%E6%8A%97%E5%B9%B2%E6%89%B0%E5%AE%89%E8%A7%84%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%E6%8A%97%E5%B9%B2%E6%89%B0%E7%94%B5%E5%AE%B9%E5%99%A8%28MPX%20X2%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-2404.pdf) — PDF · Chinese · 2024-04 · 328 KB
- [Datasheet: MPX/X2-RC series box-type metallized polypropylene (PP) film capacitive-dropper EMI suppression capacitors, Class X2 — short-form datasheet (2024-11)](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%E6%8A%97%E5%B9%B2%E6%89%B0%E7%94%B5%E5%AE%B9%E5%99%A8%28MPX%20X2-RC%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-202411.pdf) — PDF · Chinese · 2024-11 · 349 KB
- [Certificate: MPX series Class X2 film capacitor safety approval certificates (2023-11)](https://www.songtian-ste.com/documents/source-cn/%E5%AE%89%E8%A7%84%E8%AE%A4%E8%AF%81%E8%AF%81%E4%B9%A6/3-X2%E8%96%84%E8%86%9C%E7%94%B5%E5%AE%B9%E5%99%A8%EF%BC%88MPX%29%E5%AE%89%E8%A7%84%E8%AE%A4%E8%AF%81%E8%AF%81%E4%B9%A6%EF%BC%882023%E5%B9%B411%E6%9C%88%E7%89%88%E6%9C%AC%EF%BC%89.pdf) — PDF · Chinese · 2023-11 · 5.6 MB

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