Dual-stage EMC/EMI Single Phase Filter 250V Power Line Filter
With High Attenuation
Dual-stage EMI Filter:
YB21D4-20A-S(R) is the Dual-stage EMI Filter. Its connection
mode is M4 Screw. The maximum rated current up to 30 amps are
designed with both common mode and differential mode performing
high noise suppression,two-stage filtering,good filtering
effect.Typical applications include Electrical and electronic
equipment, Household equipment, Automation equipment, Fitness
machine, and Medical equipment.
Filter Selection Table:
| Part No. | Case | Rated Currents (A) | Output Connections |
| YB21D4-10A | D4 | 10 | Fast-on terminal |
| YB21D4-15A | D4 | 15 |
| YB21D4-20A | D4 | 20 | Wire |
| YB21D4-30A | D4 | 30 |
| YB21D4-40A | D4 | 40 | M4 screw |
*Q: Fast-on 6.35x0.8mm 
S: Screw lug 
W: UL1015 18awg
Naming Rule:
| YB | 21 | D4 | - | 10A | - | Q |
| | | | | | | | | | | | |
| Single Phase | Circuit | Dimension | | Current | | Output Connection |
| | 21:21 circuit | D4 | | 10A :10 amp | | Q:fast-on tab 250 |
| | | | | 20A :20 amp | | W:wire |
| | | | | 30A :30 amp | | S:M4 screw |
Features Of EMI Filter:
-- Designed 2 stage enhanced filtering to prevent the power supply
may produce interference to the device;
-- Various terminal options allow you to select;
-- There are a variety of parts and combinations to meet different
customer's EMC tests.
EMI Filter Application:
1. Electrical and electronic equipment
2. Medical equipment
3. Datacom equipment
4. Office automation equipment
| Item | Single Phase EMI Filter |
| Model | YB21D4-20A-S(R) |
| Transfer Function | Low Pass |
| Package Type | Carton |
| Nominal Center Frequency | 10K-30MHZ |
| Insertion Loss | 60~90dB |
| Input Impedance | 50Ω |
| Rated Voltage | 115V/250V |
| Rated Current | 1~30A |
| Environmental Temperature | 40°C |
| Temperature Range | -25℃~+85℃ |
| Operating Frequency | 50/60HZ |
| Line to Line | 1450VDC |
| Line to Ground | 2250VDC |
| Maximum Leakage Current | 0.4mA/115V,60HZ; 0.8mA/250V, 50HZ |
Electrical Schematic:
Mechanical Dimension(Unit: mm)
YB21D4-20A-S(R) Filter Picture:
Our Certificates:
Single Phase Filter:
cUL:20190321-E471748
TUV:B0899310001Rev.01
CQC:19001226449
CE:SZAIS180620005-01
ROHS:MMCRHRWM60371744
Three Phase Filter:
cUL:20190325-E502442
ENEC:ENEC-02580
CE:SZAIS180620005-01
ROHS:MMCRHRWM60371744
Packaging Specification:
Power Line Filter: CTN/80pcs
N/G W.: 14/15.3KG
Measures:0.565*0.285*0.205m
FAQ:
Q: What are the main products of your company?
A: IEC inlet socket EMI filter, single-phase filter, Three-phase
RFI filter, house appliance noise filter, Medical equipment filter,
inverter/converter EMC filter, etc.
Q: What is the function of your product EMC/EMI/noise filter?
A: The function of power line filters is to filter the
electromagnetic interference, ensuring that your equipment is
working properly without interference with each other
Q: Are your products belong to high-quality
A: Yes, our products have passed UL, TUV, CE, ROHS, CQC approval.
our customers like Hisense, Foxconn recognize our products well.
Q: What are services available for pre-batch orders?
A: Free samples and EMC technical rectification services are
supplied before-sale
Q: Do you supply OEM/ODM services?
A: Yes, we can do OEM/ODM only if you meet our MOQ request for
OEM/ODM customers
Q: Could we visit your factory
A: Warmly welcome you with open arms to visit us.
