Gold Member Since 2011
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Tianjin Grewin Technology Co., Ltd.

RM Transformer Core, Voltage Tranformer, Power Supply Transformer manufacturer / supplier in China, offering RM Power Supply Transformer with ISO9001: 2015, Electronics Power Supply China with IEC, High Frequency Coils Chokes for PCB and so on.

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Supplier Homepage Product Ferrite magnetic frequency transformer RM coilformers RM Power Supply Transformer with ISO9001: 2015

RM Power Supply Transformer with ISO9001: 2015

Purchase Qty.:
300-999 1,000-2,999 3,000+
FOB Unit Price: US $1.6 US $1.4 US $1.1
Purchase Qty. (Pieces) FOB Unit Price
300-999 US $1.6
1,000-2,999 US $1.4
3,000+ US $1.1
Get Latest Price
Port: Tianjin, China
Production Capacity: 100000 /Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: GWRM4, RM5, RM6, RM8, RM10, RM12, RM14etc.
  • Phase: Single
  • Cooling Method: Dry-type Transformer
  • Certification: ISO9001-2000, UL, ISO9001, CCC
  • Frequency Characteristics: Low Frequency
  • Brand: Grewin Ei Low Frequency Transformer
  • Color: Blue,Black,Yellow
  • UL Insulation System: Class B (130), F (155), H (180)
  • Trademark: Grewin Ei Low Frequency Transformer
  • Specification: VDE, CE
  • HS Code: 85043190
  • Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio, Wave Carrier Filter,TV, Monitor, Scanner etc.
  • Core: Core-type Transformer
  • Winding Type: Auto-transformer
  • Usage: Single-phase Transformer
  • Shape of Core: EI
  • Type: RM, Etd,Ei High Frequencytransformer
  • RM High Frequency Transformer Series: RM4,RM6,RM8,RM10,RM12,RM14
  • High Saturation Flux Density: High Permeability
  • Transport Package: Export Standard Carton with Strong Pallet
  • Origin: Tianjin
Product Description

We have passed ISO9001:2015,CE,SGS approval and IEC report
RM Power Supply Transformer with ISO9001: 2015
RM Power Supply Transformer with ISO9001: 2015


RM type Transformer Parameters
RM Power Supply Transformer with ISO9001: 2015

RM Power Supply Transformer with ISO9001: 2015

RM Power Supply Transformer with ISO9001: 2015

 Has a strong anti-interference, distributed capacitance, impedance, attenuation of low transmission, firm
structure,can fine-tune the inductance, etc., are widely used in fax
machines, PBX.

2). Applicable frequency range: 20 to 100kHz :
Operating frequency: higher than 200kHz
High magnetic flux and low loss magnetic materials
With low leakage inductance and high efficiency .
PCB circuits, computer, TV, monitor, scanner, duplicator, mobile adapters, printer and other equipments and instruments.
UL insulation system for Class B (130), F (155), H (180)
4). Can make other customized Ferrite transformers:
Power range: core type using N67 grade material
<5: RM4, P11/7, EF12.6 and U10
5 to 10: E (F) 16, RM5 and P14/8
10 to 20: RM6, E (F) 20, P18, U15 and EFD15
20 to 50: RM8, P22, RM10 ETD29, E25 and EFD20
50 to 100: ETD29, ETD34, RM12, P30 and EFD25
100 to 200: ETD34, ETD39, ETD44, P36, E30, E42 and EFD30
200 to 500: ETD44, ETD49 and E55
>500: ETD54, ETD59 and E65

1.UL, CUL, CE, ISO9001:2015
2.We offer custom-made transformers, OEM and ODM are welcome
3.We deliver the quality you expect at consistently competitive prices
4.Transformer quality lifetime:10 Years.
5.Specialty Sales service:5 -10 Years
6.Transformers Test: 100% test before the shipment

About us:
1). Tianjin Grewin Technology Co.,ltd. has always laying great emphasis on our core business philosophy "Quality and Honesty First ".
Grewin Mission: Growing together side by side,Mutual success hand in hand.


The following picture showed you about all finished transformer production line and package with export standard carton and strong pallets:
RM Power Supply Transformer with ISO9001: 2015
2).Terms of Shipment:
Within 10 working days after received related prepayment or L/C.

3).Payment terms:
(1). T/T 100% or 50% deposit by T/T in advance, balance amount to be paid 7 days before
(2). By irrevocable L/C at sight, to be issued immediately against confirmed order.
(3). Payment by T/T, if order amount is less than USD 20,000.

4).Flow chart of trading activities:



Days need


Request for quotation

1 day


Making quotations

1 day


Offer and counter offer

3 days


Sending and receiving samples

3-10 days


Sample confirmation

3 days


Placing a firm order

1 day


Paying and receiving the down payment

1-4 day


Factory production & Quality inspection

15-20 days


Paying and receiving the balance

4 days


Delivery of goods

1 days


Tianjin Grewin Technology Co.,Ltd.


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