220V to 12V Step Down SMPS Transformer High Frequency Transformers

• Customization: Available
• Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio
• Phase: Single
• Model NO.: SMD
• Core: Core-type Transformer
• Cooling Method: Dry-type Transformer
• Winding Type: Customized
• Certification: ISO9001-2000, ISO9001, CCC
• Usage: Single-phase Transformer, Rectifier Transformer, Power Transformer
• Frequency Characteristics: High Frequency
• Shape of Core: Efd
• Brand: Okerda
• Product Name: High Frequency Transformer
• Type: SMD Transformer
• Feature: Lower Porfile
• Bobbin Material: Phenolic/Bakelite/Pet/PBT/ T375hf/Pm9820/Pm9630
• Winding Material: Copper100%
• Transport Package: Wooden Case
• Specification: ER0905
• Trademark: OEM
• Origin: China
• HS Code: 8504319000
• Production Capacity: 1000000 PCS/Month

Product Description

SMPS Transformer High Frequency Transformers

SMD TRANSFORMER

• Applications:
  • Switching power supplies
  • LED Driving
  • DC/AC-DC converters
  • DC/AC-AC inverters
  • Ballasts
  • TV/monitors
  • ADSL
  • Audio visual equipment
  • Office automation
  • PDAs
  • Notebook computers
  • DSC
  • TFT-LCD monitors
  • ISDN
  • Various electronic equipment
  • Ultra-thin electronic devices
• Customers' specifications are welcome

Features:
1. Low profile small package light weight. 
2. Low D.C. resistance and large permissible D.C. current. 
3. Little co-planarity due to special design of construction. 
4. Wire burst resistant due to special construction. 
5. This can be surface mount assembly and reflow soldering is also possible. 
6. Available for mounting machine due to supply in a form of embossed tape carrying. 
 

Model	A	B	C	D	E	F	G
EFD15/15/5	15.0±0.4	11.0±0.35	5.3±0.15	4.65±0.15	7.5±0.15	5.5±0.25	2.4±0.1
EFD15/18/7	14.9±0.6	11.1±0.3	5.6±0.2	6.8±0.2	8.75±0.15	6.2±0.2	4.6±0.2
EFD18/40/5	18.5max	13.1min	6.0±0.15	5.3±0.15	20.1±0.2	17.1±0.2	3.0±0.2
EFD20/20/7	20.0±0.55	15.4±0.5	8.9±0.2	6.65/+0.2/0.15	10.0±0.25	7.7±0.25	3.6±0.2
EFD20/23/6	20.0±0.55	15.4±0.5	8.9±0.2	5.6±0.1	11.5±0.15	9.3±0.15	3.6±0.15
EFD20/23/5	20.0±0.4	15.4±0.5	8.9±0.2	5.4±0.1	11.5±0.15	9.3±0.15	3.6±0.15
EFD25/25/9	25.0±0.65	18.7±0.6	11.4±0.2	9.1±0.2	12.5±0.25	9.3±0.25	5.2±0.25
EFD25/26/12	25.05±0.65	18.8min	8.8±0.25	12.45±0.25	12.9±0.2	9.85±0.25	8.3±0.3
EFD25/31/11	25.0±0.5	19.0min	10.0±0.2	11.0±0.2	15.3±0.25	12.0±0.3	6.5±0.2
EFD30/30/9	30.0±0.8	22.4±0.75	14.6±0.3	9.1±0.3	15.0±0.25	11.2±0.3	4.9±0.15
EFD30/30/9A	30.75max	23.1min	14.6±0.25	9.0±0.2	15.5max	11.5±0.2	4.9±0.15
EFD31/30/9	31.7max	23.8min	14.6±0.30	9.0/+0.3/-0.2	15.2±0.3	11.5±0.2	4.9±0.15
EFD33/40/10	33.0±0.5	25.5min	13.0±0.2	10.0±0.2	20.0±0.25	15.5±0.25	5.5±0.2

 

Characteristic:
1. Supply high voltage and withstand voltage;
2. Operation frequency range from 40 to 80 KHz;
3. Deliver Output Power from 1.5 to 25 watts;
4. Slim or low profile Type easily built in your design;
5. Available in through-hole and SMT recess or gull wing type;
6. Operate in Royer , direct IC drive and other topologies.

Application:
1. Multi-output DC-DC converter transformer. 
2. Camcordey. 
3. LCD television set. 
4. Small size communicating equipment. 
5. Portable telephone. 
6. Personal Digital Assistants.
7. Applicable to light up cold cathodes fluorescent lamp of display.
8. DSC, PDA, Scanner, Car Navigation, Notebook PC, LCD monitor and LCD TV, etc
 

Related products

Series	Application
EE Transformer	Applied in the switching power supply, main power transformer
	EE10, EE13, EE16, EE19, EE22, EE25, EE28, EE30, EE33, EE35, EE40, EE42, EE55, EE65
PQ Transformer	Applied in the linear filter, choke, pulse transformer, drive transformer
	PQ2016, PQ2020, PQ2610, PQ2620, PQ2625, PQ3220, PQ3225, PQ3230, PQ3535, PQ4040, PQ5050
RM Transformer	Filters, inductors and transformers for telecommunication other electronic equipment
	RM4, RM6, RM8, RM8, RM10, RM12, RM14
EI Transformer	Various kinds of transformers and chokes
	EI28, EI13, EI16, EI22, EI25, EI30, EI35, EI33, EI40
EEL Transformer	Switching power supply, charges, alarm system
	EEL13, EEL19, EEL22, EEL25
EF Transformer	Applied in the switching power supply, main power transformer
	EF16, EF12.6, EF20, EF25, EF30
EFD Transformer	Auxiliary power transformer, main power transformer, choke coils
	EFD15, EFD20, EFD25, EFD30, EFD40
UU Transformer	Varieties of switching power supply transformer, choke coils etc
	UU9.8, UU10.5, UU16, UU20
EC Transformer	Linear filter, current transformer, smoothing chock coil, drive transformer
	EC28, EC35, EC39, EC40, EC42, EC49
ER Transformer	Applied in the linear filter, current transformer, smoothing chock coil, drive transformer
	ER47, ER48, ER49

Packing &Shipping



Why Choose Us:
1. 20 years experience in transformer and inductor manufacturing
2. Scientific management system, strong technical team, and strict quality control system
3. RoHS,CE,TUV and UL certified
4. OEM & ODM
5. Competitive price,in time delivery and perfect after-service online.