# CD Series Safety Certified Disc Ceramic Capacitors (Class X1/Y1)

> Leaded disc ceramic safety capacitors, Class X1/Y1, up to 500 VAC, 10–4,700 pF. Y5P/Y5U/Y5V certified to Annex I grade IIIB (85 °C / 85% RH).

- Series code: CD
- Product line: [Ceramic capacitors](https://www.songtian-ste.com/en/products/ceramic-capacitors/) › Safety disc capacitors (X1/Y1, X1/Y2, Y2)
- Approvals: UL, VDE, ENEC, CQC
- Part numbers: 1,209 · [part list (JSON)](https://www.songtian-ste.com/data/parts/cd-y1.json)
- Page: https://www.songtian-ste.com/en/products/ceramic-capacitors/cd-y1/
- Chinese version: https://www.songtian-ste.com/zh/products/ceramic-capacitors/cd-y1/
- [Ask AI about this series](https://www.songtian-ste.com/en/products/ceramic-capacitors/cd-y1/?ask=Help%20me%20choose%20a%20part%20from%20the%20STE%20CD%20series.)

## Key specifications

| Parameter | Value |
| --- | --- |
| Safety class | X1 / Y1 (IEC 60384-14) |
| Rated voltage | Up to 500 VAC · 1,500 VDC (Y5P/Y5U/Y5V) |
| Capacitance | 10–4,700 pF |
| Dielectrics | SL / Y5P / Y5U / Y5V |
| Humidity robustness | Annex I grade IIIB (Y5P/Y5U/Y5V) |
| Approvals | CQC · VDE/ENEC · IECEE CB · UL/cUL |

## Engineering details

### Overview

Leaded disc ceramic safety capacitors, Class X1/Y1 to IEC 60384-14, for EMI suppression across reinforced insulation. Certified 10–4,700 pF, up to 500 VAC; designated Y5P, Y5U and Y5V constructions are certified for 1,500 VDC. Y5P, Y5U and Y5V are certified to Annex I grade IIIB: 1,000 h at 85 °C / 85% RH with rated voltage.

#### Series features

- Class X1/Y1 to IEC 60384-14; Y1 up to 500 VAC
- Certified 10–4,700 pF across SL, Y5P, Y5U and Y5V dielectrics
- 1,500 VDC approval for designated Y5P, Y5U and Y5V constructions
- Annex I grade IIIB (Y5P/Y5U/Y5V): 1,000 h at 85 °C / 85% RH with rated voltage
- Radial epoxy-coated construction up to +125 °C; bulk or taped

#### Typical applications

- Primary-to-secondary coupling in switch-mode power supplies and AC converters
- Line-to-earth (common-mode) filtering where the equipment standard requires Y1
- Low-capacitance antenna coupling and bypass with the certified SL range
- Industrial, lighting and renewable-energy power electronics in high humidity (grade IIIB: Y5P/Y5U/Y5V)

### Specifications

|   |   |
| --- | --- |
| Safety class | X1 / Y1 · IEC 60384-14 |
| Rated AC voltage, Y5P/Y5U/Y5V | 250 · 400 · 500 VAC |
| Rated AC voltage, SL | 250 · 400 VAC |
| Rated DC voltage | 1,500 VDC · designated Y5P/Y5U/Y5V only |
| Certified capacitance range | 10–4,700 pF |
| Capacitance by dielectric | SL 10–82 pF · Y5P 100–1,000 pF · Y5U 330–4,700 pF · Y5V 1,000–4,700 pF |
| Capacitance tolerance | K ±10% · M ±20%, depending on dielectric and value |
| Operating temperature | −40 °C to +125 °C (Y5P/Y5U/Y5V) |
| Climatic category | SL 25/125/21 · Y5P/Y5U/Y5V 40/125/21 |
| Humidity robustness | Annex I grade IIIB · Y5P/Y5U/Y5V only |
| Passive flammability | SL class C · Y5P/Y5U/Y5V class B |
| Measuring conditions | 25 °C · 1 kHz · 1 Vrms (Y5P/Y5U/Y5V) |
| Dissipation factor | ≤2.5% (Y5P/Y5U/Y5V) |
| Insulation resistance | ≥10,000 MΩ |
| Dielectric strength | 4,000 VAC · test duration and ramp on request |
| Lead spacing | 10.0 ±0.5 mm |
| Lead diameter | 0.60 or 0.65 ±0.05 mm, depending on part |
| Body dimensions | D max. 6.0–14.5 mm · T max. 4.0–6.0 mm (Y5P/Y5U/Y5V) |
| Hand soldering | 350 °C max. · 3 s max. · ≥2 mm from coating |
| Storage | ≤35 °C · ≤70% RH · 12 months, unopened |
| Environmental compliance | RoHS · REACH · bromine-free / halogen-free |

### Variants

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

| Variant | Body dimensions | Certified capacitance range | Tolerance / approval scope | Lead / land pattern | Notes |
| --- | --- | --- | --- | --- | --- |
| SL | On request | 10–82 pF | K ±10% · 250/400 VAC · no 1,500 VDC, no grade IIIB | Drawing on request | Low-capacitance coupling and bypass; climatic category 25/125/21, passive flammability class C. |
| Y5P | D max. 7.0–12.0 · T max. 4.0–6.0 mm | 100–1,000 pF | K ±10% · up to 500 VAC · 1,500 VDC (designated) · IIIB | F 10.0 ±0.5 · d 0.60/0.65 ±0.05 mm | Lower high-K range; 40/125/21, class B, grade IIIB. |
| Y5U | D max. 6.0–14.5 · T max. 4.5–6.0 mm | 330–4,700 pF | K ±10% (330–680 pF) · M ±20% (1,000–4,700 pF) · 1,500 VDC · IIIB | F 10.0 ±0.5 · d 0.60/0.65 ±0.05 mm | Wide mid-to-high capacitance range; tolerance changes from K to M at 1 nF. |
| Y5V | D max. 6.5–12.5 · T max. 4.5–6.0 mm | 1,000–4,700 pF | M ±20% · up to 500 VAC · 1,500 VDC (designated) · IIIB | F 10.0 ±0.5 · d 0.60/0.65 ±0.05 mm | Compact high-capacitance option; check effective capacitance and leakage-current margin closely. |

### Selection guide

Define the Y1 insulation position and the voltage code first. Then choose between the low-capacitance SL range and the Y5P/Y5U/Y5V dielectrics, calculate line-frequency leakage current, and check whether the ordered dielectric carries 1,500 VDC and Annex I grade IIIB.

1. **Confirm that Y1 is required**
   Map the capacitor to the line-to-earth or primary-to-secondary reinforced-insulation position in the end-equipment standard. Confirm mains voltage, overvoltage category, creepage, clearance and abnormal conditions.
2. **Choose the voltage and approval scope**
   SL is rated 250/400 VAC only. Y5P/Y5U/Y5V extend to 500 VAC, and designated constructions to 1,500 VDC. Select one certified voltage code; do not combine the highest values of different rows.
3. **Choose SL or a high-K dielectric**
   SL covers 10–82 pF, with its own climatic and flammability classes. SL part numbers and drawings on request.
4. **Check attenuation and leakage together**
   Calculate common-mode impedance and I = 2πfCV at maximum voltage, frequency and capacitance tolerance. Include effective-capacitance change over temperature and voltage where the filter margin is narrow.
5. **Confirm mechanics, humidity grade and process**
   Confirm disc dimensions, lead form, bulk or tape code, Annex I grade, soldering profile, storage rules and approvals for the final part number.

### Approvals & reliability

#### Approvals & qualifications

SL and Y5P/Y5U/Y5V have different approval scopes.

| Agency | Standard | Certificate | Scope |
| --- | --- | --- | --- |
| CQC CQC | IEC 60384-14:2013 + AMD1:2016 | CQC19001213616 | CD X1/Y1, 10–4,700 pF; 250/400/500 VAC depending on dielectric, tolerance K/M, SL and Y5P/Y5U/Y5V. Y5P/Y5U/Y5V: 40/125/21, class B, Annex I grade IIIB, Annex H. Issued 11 Mar 2022, valid subject to surveillance. |
| VDE, ENEC VDE / ENEC | EN 60384-14 | 40025754 | SL 10–82 pF, 250/400 VAC, 25/125/21, class C; Y5P/Y5U/Y5V 100–4,700 pF up to 500 VAC, 40/125/21, class B, Annex I grade IIIB, 1,500 VDC (Annex H). |
| IECEE CB IECEE CB | IEC 60384-14:2013 + AMD1:2016 | DE1-64371/B2/A1/M1 | CD Y5P/Y5U/Y5V, 100–4,700 pF, 250/400/500 VAC, X1/Y1, 40/125/21/B, Annex I grade IIIB, Annex H. Amendment M1 adds 1,500 VDC. |
| UL UL / cUL | UL / CSA 60384-14 component recognition | E208107 | Recognized component, USA and Canada: CD X1/Y1, 100–4,700 pF, 250/400/500 VAC; 1,500 VDC for high-K parts; −40 to +125 °C; grade IIIB. |

Each certificate covers the types and ratings listed on it.

#### Reliability tests

Y5P, Y5U and Y5V are certified to Annex I grade IIIB. Full qualification table and post-test electrical limits on request.

| Test | Condition | Acceptance |
| --- | --- | --- |
| Humidity robustness, Annex I (Y5P/Y5U/Y5V) | 85 °C / 85% RH · rated voltage · 1,000 h | Grade IIIB (certified). |
| Dielectric strength | 4,000 VAC · duration, ramp, source impedance and trip current on request | No breakdown. Use the specified method for production and end-equipment hipot tests. |

### Design notes

#### SL values have separate ratings

SL parts (10–82 pF) are rated 250/400 VAC, with climatic category 25/125/21 and passive flammability class C.

#### 1,500 VDC is high-K only

Annex H covers designated Y5P/Y5U/Y5V constructions, not the SL range. The 4 kVAC dielectric-strength rating does not replace a continuous DC approval.

#### Grade IIIB applies to Y5P/Y5U/Y5V only

The 1,000 h 85/85 grade applies to the high-K approval scope. SL has a different climatic and flammability classification, and no Annex I grade is specified for SL.

#### Leakage current and effective capacitance share the margin

Calculate line-frequency current at maximum C, f and V, then verify the temperature and voltage dependence of the chosen dielectric. The 4.7 nF maximum does not necessarily fit every touch-current budget.

#### Impulse and life-test data

Impulse waveform and repetitions, life-test voltage and duration, and post-test ΔC/DF/IR/withstand limits on request. Do not apply impulse or life-test values of other series to CD parts.

#### Soldering, storage and mechanical stress

Hand rework: 350 °C max., 3 s max., at least 2 mm from the coating. Store unopened parts for up to 12 months at ≤35 °C / ≤70% RH, away from corrosive gases. Form leads without loading the ceramic body.

### Part numbering

Example ordering code. Not every combination is available.

`Q · 09 · F · 1 · D · 222 · M · N0 · B · 0 · G · 0 · N · 0`

| Code | Meaning |
| --- | --- |
| Q | Rated-voltage family code (Y1) |
| 09 | Body diameter code: 09 = 9 mm |
| F | Temperature characteristic: F = Y5V |
| 1 | Lead form: 1 = long straight leads |
| D | Lead spacing: D = 10.0 mm |
| 222 | Capacitance code: 222 = 2,200 pF |
| M | Capacitance tolerance: M ±20% |
| N0 | Lead length or tape seating-height code, depending on packaging |
| B | Packaging: B = bulk, T = tape |
| 0 | Environmental code: 0 = RoHS; a RoHS + halogen-free code is also defined |
| G | Approval voltage code: G = Y1 500 VAC / 1,500 VDC |
| 0 · N · 0 | Internal management codes |

## Datasheets & approval documents

- [Datasheet: CD series safety ceramic disc capacitors, Y1 500 VAC / 1500 VDC — short-form datasheet (2023-10)](https://www.songtian-ste.com/documents/source-cn/%E9%99%B6%E7%93%B7%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/%E5%AE%89%E8%A7%84%E9%99%B6%E7%93%B7%E7%94%B5%E5%AE%B9%E5%99%A8-CD%E7%B3%BB%E5%88%97%28Y1-500VAC%201500VDC%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-202310.pdf) — PDF · Chinese · 2023-10 · 342 KB
- [Datasheet: CD series safety ceramic disc capacitors, Y1 500 VAC — short-form datasheet (2025-01)](https://www.songtian-ste.com/documents/source-cn/%E9%99%B6%E7%93%B7%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/%E5%AE%89%E8%A7%84%E9%99%B6%E7%93%B7%E7%94%B5%E5%AE%B9%E5%99%A8-CD%E7%B3%BB%E5%88%97%28Y1-500VAC%29%E7%AE%80%E7%89%88%E8%A7%84%E6%A0%BC%E4%B9%A6-202501.pdf) — PDF · Chinese · 2025-01 · 341 KB
- [Certificate: CD and CE series ceramic 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%A6/2-%E9%99%B6%E7%93%B7%E7%94%B5%E5%AE%B9%E5%99%A8%EF%BC%88CD%2CCE%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%EF%BC%89.pdf) — PDF · Chinese · 2023-11 · 5.7 MB

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