# MPK/X1 Series Metallized Polypropylene Film Interference Suppression Capacitors (Class X1)

> Boxed metallized polypropylene film capacitors for across-the-line EMI suppression, Class X1. Rated 330–530 VAC, 1 nF–1 µF.

- Series code: MPK/X1
- Product line: [Film capacitors](https://www.songtian-ste.com/en/products/film-capacitors/) › EMI suppression capacitors (X1/X2/Y2)
- Approvals: UL, VDE, ENEC, CQC
- Part numbers: 153 · [part list (JSON)](https://www.songtian-ste.com/data/parts/mpk-x1.json)
- Page: https://www.songtian-ste.com/en/products/film-capacitors/mpk-x1/
- Chinese version: https://www.songtian-ste.com/zh/products/film-capacitors/mpk-x1/
- [Ask AI about this series](https://www.songtian-ste.com/en/products/film-capacitors/mpk-x1/?ask=Help%20me%20choose%20a%20part%20from%20the%20STE%20MPK%2FX1%20series.)

## Key specifications

| Parameter | Value |
| --- | --- |
| Safety class | X1, across-the-line |
| Rated voltage | 330 / 440 / 480 / 500 / 530 VAC |
| Capacitance | 0.001–1.0 µF |
| Tolerance | ±10% / ±20% |
| Impulse test voltage | 4 kV (CR ≤1.0 µF) |
| Operating temperature | −40 °C to +110 °C |

## Engineering details

### Overview

Boxed metallized polypropylene film capacitors for across-the-line (L–N) EMI suppression, Class X1 to IEC / EN / UL 60384-14. Rated 330, 440, 480, 500 and 530 VAC; 1 nF–1 µF; tolerance ±10% or ±20%. Impulse test voltage 4 kV (CR ≤1.0 µF). 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 X1 to IEC / EN / UL 60384-14 for across-the-line interference suppression where a higher impulse class than X2 is required
- Five certified AC ratings: 330, 440, 480, 500 and 530 VAC; capacitance 1 nF–1 µF
- Impulse test (4 kV, 24 pulses) and self-ignition test are specified
- Six lead pitches from 7.5 to 37.5 mm
- Boxed, resin-encapsulated metallized polypropylene construction; flame-retardant to UL 94 V-0

#### Typical applications

- Across-the-line EMI suppression in single- and three-phase power inputs
- Power supplies, drives, industrial controls and energy equipment that require Class X1
- High-voltage mains filtering; verify surge, humidity and current in the end equipment

### Specifications

|   |   |
| --- | --- |
| Safety function | Class X1 · across-the-line (L–N) EMI suppression · higher impulse class than X2 · not for line-to-earth (Y) positions |
| Construction | Metallized polypropylene film · boxed, resin-encapsulated |
| Reference standards | IEC / EN / UL 60384-14 · approvals to IEC 60384-14:2013 + AMD1:2016 |
| Rated AC voltage UR | 330 · 440 · 480 · 500 · 530 VAC |
| Capacitance range | 0.001–1.0 µF · available values depend on rated voltage, body size, tolerance and approval scope |
| Capacitance tolerance | ±10% (K) · ±20% (M, on request) |
| Operating temperature | −40 °C to +110 °C |
| Climatic category / flammability | 40/110/56 · passive flammability category B |
| 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 test voltage | 4 kVDC for CR ≤1.0 µF; a test condition, not a continuous or repetitive rating |
| Impulse sequence | 24 pulses · 9 s charge / 2 s discharge cycle |
| Self-ignition test | U~ = UR · Ui = 4.0 kV · 20 discharges of the energy-storage capacitor per sample · 5 s interval |
| DC operation | No continuous DC rating. VDE certificate 40054631 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 MPK/X1-THB. |
| Body dimensions | W 10–41.5 · H 11–35.5 · T 5–22.5 mm, depending on rated voltage and capacitance |
| Lead pitch | 7.5 · 10 · 15 · 22.5 · 27.5 · 37.5 mm |
| Lead diameter | 0.6 mm (pitch 7.5–10 mm) · 0.8 mm (15–37.5 mm) |
| Lead and packing forms | Long straight · inner-bent · straight, taped · bent, taped |
| Taped lead spacing F | 7.5 / 10 / 15 / 20–22.5 mm; F = 5 mm is not offered in this series |
| 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 |
| Storage | In unopened package: ≤35 °C, ≤70% RH, ≤12 months. Keep away from corrosive gases to preserve lead solderability. |
| Environmental compliance | RoHS and REACH compliant · code E = RoHS, F = RoHS + halogen-free |
| Further data | On request: tan δ measurement conditions · voltage-proof test duration, terminals to case · impulse-circuit details · surge coordination · dry-heat life · dV/dt · current · ESR · thermal · humidity · 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 |
| --- | --- | --- | --- | --- | --- |
| J · 7.5 mm | W 10 · H 11–15 · T 5–8 mm | 330–530 VAC · 0.001–0.0056 µF | Metallized PP · X1 · K/M | P 7.5 ±1.0 · d 0.6 ±0.05 mm | Smallest body and lowest capacitance values. |
| N · 10 mm | W 13 · H 11–15 · T 5–8 mm | 330–530 VAC · 0.001–0.01 µF | Metallized PP · X1 · K/M | P 10 ±1.0 · d 0.6 ±0.05 mm | Compact high-voltage across-the-line filtering. |
| Q · 15 mm | W 18 · H 11–19 · T 5–11 mm | 330–530 VAC · 0.01–0.068 µF | Metallized PP · X1 · K/M | P 15 ±1.0 · d 0.8 ±0.05 mm | — |
| T · 22.5 mm | W 26.5 · H 16.5–23 · T 7–13 mm | 330–530 VAC · 0.047–0.18 µF | Metallized PP · X1 · K/M | P 22.5 ±1.0 · d 0.8 ±0.05 mm | For repetitive mains-filter duty, check current and temperature rise. |
| V · 27.5 mm | W 31–31.5 · H 20–28 · T 11–18 mm | 330–530 VAC · 0.1–0.33 µF | Metallized PP · X1 · K/M | P 27.5 ±1.0 · d 0.8 ±0.05 mm | — |
| L · 37.5 mm | W 41.5 · H 28–35.5 · T 14–22.5 mm | 330–530 VAC · 0.39–1.0 µF | Metallized PP · X1 · K/M | P 37.5 ±1.0 · d 0.8 ±0.05 mm | Largest body. Verify mechanical fixing, vibration and hot-spot temperature. |

### Selection guide

Start with the circuit position: Class X1 is an across-the-line class for higher impulse stress and is not interchangeable with X2 or Y capacitors. Then define the certified AC voltage, capacitance, surge and impulse requirements, body size, humidity profile and assembly process.

1. **Confirm the X1 circuit position**
   Use X1 across line conductors where the equipment standard and overvoltage category require its higher impulse class. Do not use it as a line-to-earth Y capacitor, and do not substitute X2 without checking insulation and surge requirements.
2. **Match the AC voltage approval**
   Select 330, 440, 480, 500 or 530 VAC and the approval marks the end equipment needs.
3. **Coordinate surge and repetitive stress**
   The 4 kV / 24-pulse impulse sequence is a test condition, not an application surge rating. Define waveform, source impedance, peak current and repetition for the equipment, and coordinate surge protection at equipment level.
4. **Set capacitance, losses, current and mission profile**
   Choose capacitance for the required EMI attenuation. Then verify losses, RMS and peak current, self-heating, derating over frequency and temperature, dry-heat life and humidity performance. The AC rating alone does not define any of these.
5. **Specify geometry and assembly process**
   Specify W/H/T, pitch, lead diameter and form and packing for each capacitance and voltage. Use the soldering profile of the selected part, check PCB spacing and do not reflow-solder.

### Approvals & reliability

#### Approvals & qualifications

CQC, VDE/ENEC, IECEE CB and UL/cUL approvals cover MPK X1 capacitors from 1 nF to 1 µF at 330–530 VAC. The approvals include neither DC use (Annex H) nor an Annex I humidity grade.

| Agency | Standard | Certificate | Scope |
| --- | --- | --- | --- |
| CQC CQC | IEC 60384-14:2013 + AMD1:2016 | CQC22001337767 | MPK X1, 0.001–1.0 µF, 330/440/480/500/530 VAC, ±10% (K) or ±20% (M). Issued 7 Apr 2022. |
| VDE, ENEC VDE / ENEC | EN 60384-14:2013 + A1:2016 | 40054631 | MPK X1, 0.001–1.0 µF, 330/440/480/500/530 VAC, K/M, climatic category 40/110/56, passive flammability category B. No Annex H (DC) approval; no Annex I humidity grade. |
| IECEE CB IECEE CB | IEC 60384-14:2013 + AMD1:2016 | DE1-65967 | MPK X1, 1 nF–1 µF, K/M, 330/440/480/500/530 VAC, 40/110/56/B. Test report 288316-TL3-1. |
| UL UL / cUL | UL 60384-14 | E208107 | MPK X1, 0.001–1.0 µF, 330/440/480/500/530 VAC, −40 to +110 °C, tolerance K/M. |

Each certificate covers the types and ratings listed on it.

#### Reliability tests

Initial characteristics cover dissipation factor, insulation resistance and voltage proof. Impulse and self-ignition test sequences are specified at 4 kV.

| Test | Condition | Acceptance |
| --- | --- | --- |
| Impulse test | 4 kVDC · 24 pulses · 9 s charge / 2 s discharge | Test circuit, waveform and post-test limits on request |
| Self-ignition test | U~ = UR · Ui = 4.0 kV · 20 discharges per sample · 5 s interval | Test energy and pass criteria on request |
| 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 X1 between line conductors

Use between line conductors where the required impulse class and the equipment standard allow the part. An X1 capacitor is not a line-to-earth Y capacitor and does not replace reinforced insulation.

#### Rated voltage is not a surge rating

330–530 VAC is the certified continuous AC rating. The 4 kV impulse test is a test condition, not a continuous or repetitive rating. Coordinate installation category, mains transients and equipment surge tests with the impulse test circuit and acceptance criteria.

#### Control loss, current and hot-spot temperature

Design with tan δ versus frequency and temperature, RMS and peak current, ESR and thermal resistance of the selected part. Validate normal, brownout, harmonic and repetitive transient operation in the final enclosure.

#### No THB rating

This series has no biased 85/85 humidity rating, and its VDE approval includes no humidity grade. For humid environments, select MPK/X1-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 PCB spacing, cleaning, coating and vibration in the application.

### Part numbering

Example ordering code. Not every combination is available.

`X1 · S1 · 104 · K · Q · 1 · B0 · 180 · 120 · 060 · E · V · 0`

| Code | Meaning |
| --- | --- |
| X1 | Safety class X1 (across-the-line) and series |
| S1 | Rated voltage: S1 = 440 VAC; R1 = 330, S3 = 480, H2 = 500, K1 = 530 VAC |
| 104 | Capacitance code: 104 = 100 nF |
| K | Capacitance tolerance: K = ±10%; M = ±20% |
| Q | Lead pitch: Q = 15 mm; J = 7.5, N = 10, T = 22.5, V = 27.5, L = 37.5 mm |
| 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 |
| V | Case color: V = blue; E = gray |
| 0 | STE internal management code |

## Datasheets & approval documents

- [Datasheet: MPK/X1 series box-type metallized polypropylene (PP) film EMI suppression capacitors, Class X1 — short-form datasheet (2022-08)](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%28MPK%20X1%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-20220816.pdf) — PDF · Chinese · 2022-08 · 328 KB
- [Certificate: MPK series Class X1 film capacitor safety approval certificates (2022-04)](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-X1%E8%96%84%E8%86%9C%E7%94%B5%E5%AE%B9%E5%99%A8%EF%BC%88MPK%EF%BC%89%E5%AE%89%E8%A7%84%E8%AE%A4%E8%AF%81%E8%AF%81%E4%B9%A6-%EF%BC%882022%E5%B9%B44%E6%9C%88%E7%89%88%E6%9C%AC%EF%BC%89.pdf) — PDF · Chinese · 2022-04 · 1.8 MB

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