HNST WELCOME! 0755-23173910
English /中文
你当前的浏览器版本过低或不支持。请升级或更换浏览器。推荐浏览器 Chrome Edge。

 

 

The four terminal sampling resistor, also known as the Kelvin resistor, is mainly used for dual collection of current and voltage, reducing mutual interference between current and voltage during the measurement process, making current collection more accurate. The four terminal sampling resistor SFCA series of Huade Electronic Walter mainly consists of low resistance resistors, with resistance values ranging from 0.5m Ω to 100m Ω and a power of 0.5W.

 

 

Suzhou Walter four terminal sampling resistor SFCA series has the following advantages:

 

1. Wide range of volume options: 1206,2512

 

2. Wide range of resistance options: 1mR~25mR

 

3. Wide range of power options: 0.5W

 

4. High accuracy: △ ≤ 1%

 

5. Low temperature coefficient: TCR < 50ppm/℃

 

6. High frequency response: H < 5.0nH

 

7. Excellent low galvanic effect (EMF<0.5uV/℃)

 

8. How to use RoHS and REACH halogen-free standards

 

9. The anti welding layer complies with UL94-V0 level

 

10. Low inductance (<0.05uH 10MHz)

11. Simultaneously collecting current and voltage for higher accuracy

The Naming convention of the four terminal sampling resistor SFCA series of Suzhou Huade Electronic Walter are as follows:

 

SFCA 2512 M 0W5 R001 F S
1 2 3 4 5 6 7

 

1: Product series: SFCA series, metal ceramic alloy current detection resistor, Short electrode, four terminals, With lateral guide

 

2: Volume: 2512=6432=6.4 * 3.2mm

 

3: Material: M=Manganese copper alloy=MnCu alloy

 

4: Power: 0W5=0.5Watt

 

5: Resistance value: R001=0.001R=1mR

 

6: Accuracy: D=0.5%, F=1%

 

8: Product code: internal code or custom code

 

The selection parameters of Suzhou Huade Electronics Walter four terminal sampling resistor SFCAseries are shown in the table below:

 

Part Number

Resistance Value

()

Power Rating

(Watt)

Resistance Tolerance

(%)

TCR

(ppm/℃)

SFCA1206M0W5R 1~4 05 ±1%(F) ±100ppm
5~100 0.5 ±0.5%(D)±1%(F) ±50ppm
SFCA2512M1W0R 1~4 0.5 ±1%(F) ±100ppm
5~100 0.5 ±0.5%(D)±1%(F) ±50ppm

 

 Walter four terminal sampling resistor SFCA series functional characteristics:

 

Parameter

Conditions

Consent Standard

Short time over load

Power=2.5*Pr ; T=25±2℃ ; t=5s

± (1.0%+0.5mΩ)

IEC60115-1 4.13

 

High temp. exposure

T=+155±2℃; t=1,000hrs

± (1.0%+0.5mΩ)

IEC60115-1 4.25

Low temp. load life

T=-55±2℃ ; t=1,000hrs

± (1.0%+0.5mΩ)

IEC60115-1 4.25

Moisture load life

Vtest=Vmax, ton=90min,toff=30min, T=60±2℃,RH=95%,1,000hrs

± (2.0%+0.5mΩ)

IEC60115-1 4.25

Thermal shock

[-55℃ 30min→ R.T. 3min→ +150℃ 30min→ R.T. 3min]

by 100 Continuous Cycles

± (1.0%+0.5mΩ)

IEC60115-1 4.19

Load life at 70℃

Vtest=Vmax ; T=70±2℃ ; t=90min On t=30min Off; 1,000hrs

± (2.0%+0.5mΩ)

IEC60115-1 4.25

Solderability

Dipped into solder at 245±5℃ for 3±1s

The covered area >95%

IEC60115-1 4.17

 

Resistance to solder heat

20±1s at 275±5℃

±(1%+0.5mΩ) IEC60115-1 4.18

Substrate bending

Span between fulcrums: 90mm; Bend width: 2mm; Test board:

Glass-epoxy board, Thickness=1.6mm by 10 continuous cycles

±(1%+0.5mΩ) IEC60115-1 4.33

Mechanical shock

a=100G for 11ms, 5 Pulse

±(1%+0.5mΩ) IEC60115-1 4.21

 

Brand

Product Recommendation

Recommend Article