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YDS’s 4-terminal Current Sensor enables to surface mount on the ceramic substrate easily. The current terminals and the sensing are the same, which can be replaceable each other. It will be much easier to design circuits without a great care about a precision change generated concerning the position of leads. Manufacturing resistors in chip type can reduce the cost and they are available in a wide range of circuits which need even high precision.

• High ability to sense the current; ±5% of precision guaranteed

• Small sensing change by temperature change; in resistance to ±50ppm/°C guaranteed

• Easy automatic mounting because of surface mount type with round wrapped electrode; taped serving

• Having the current terminals and the sensing independently enables to realize easy circuit designing with no change of resistance by connecting points.

• High precision and stability because of high precision thin film and manufacturing methods of it

• Having the current terminals and the sensing independently makes no error by measuring methods and no measuring error before/after the measurement.

• Big overload causes breaking of wire so it is safe for unexpected overload.

• Low price achieved by thin film manufacturing method

• Four types of rated power; each one is different sized

Item	RL1632L4	RL2550L4	RL3264L4	RL3264SW 4
Power Rating(Derating Curve???Figure-1)	0.5W	0.75W	1.0W	2W
Resistance Value for Current Sensing(Note1)	10m~500mO	10m~500mO	10mO~500mO	1mO~10mO
Resistance Tolerance	±0.5%(D) ? ±1.0%(F)
Terminal Resistance (Note2)	10mO~47mO : 5mO or less 50mO~500mO : 20mO or less			0.5mO or less
Temperature Coefficient of Resistance (Note3)	10~500mO ± 50ppm/°C			1mO:±300ppm/°C 2~ 4mO:±200ppm/°C 5~10mO:±100ppm/°C
Maximum over current	I=v(20/R) [ A ] (10m sec. or less) R = Resistance Value(O) Maximum Current 20A	I=v(29/R) [ A ] (10m sec. or less ) R = Resistance Value(O) Current 23A	I=v(38/R) [ A ] (10m sec. or less ) R = Resistance Value(O) Current 27A	I=v(150/R) [ A ] (10m sec. or less ) R = Resistance Value(O) Current 200A
Operating Temperature Range	-40~+125°C
Rated Ambient Temperature	+70°C

Note1: The current sensing resistance shows the resistance generating voltage relative to line current through current terminals. Please pay attention; it is not the resistance between current terminals.

Note2: The terminal resistance shows the resistance of the lines where current sensing voltage will passing and voltage will be detected. The current sensing resistance and the terminal resistance show the resistance between current/ voltage terminals.

Note3: Temperature characteristics show the change of current sensing voltage generated by temperature changes. Please pay attention; it is not the temperature coefficient of resistance between terminals.

Item	Conditions	Specification
Short Time Over Load	Voltage of 1.5 times the rated voltage shall be applied for 5s.	±(0.5% +0.0005 ohm)
Load life	Rated voltage for 90min followed by a pause of 30min at a temperature of 70±3°C. Cycles shall be repeated for 1000H.	±(0.5% +0.0005 ohm)
Moisture Load life	Rated voltage for 90min followed by a pause of 30min at a temperature of 60±2°C with relative humidity of 90~95%. Cycles shall be repeated for 1000h.	±(0.5% +0.0005 ohm)
Temperature Cycle	[-40°C 30min ~ R.T. 3min ~ +125°C30min ~ R.T. 3min ] 5continuous cycles.	±(0.5% +0.0005 ohm)
Soldering Heating	Dipped into solder for 10±1sec at 260±5°C	±(0.5% +0.0005 ohm)
Substrate Bending	Between fulcrums :90mm Bend width : 2mm Glass-epoxy board t=1.6mm	±(0.5% +0.0005 ohm)
Solderability	Dipped into solder for 3±0.5sec at 235±5°C	95% or more of the substrate surface should be wet.

(mm)	L	W	A	B	C	D
RL1632L4	8.0	3.5	1.0	0.3	4.5	2.5
RL2550L4	12.0	5.5	1.4	0.5	6.5	3.6
RL3264L4	15.0	7.0	2.0	0.6	8.5	4.4
RL3264SW4	20.0	20.0	2.2	1.0	5.0	7.6

	RL1632L4	RL2550L4	RL3264L4	RL3264SW4
W	1.6±0.2	2.5±0.2	3.2±0.2	3.2±0.2
L	3.2±0.2	5.0±0.2	6.4±0.2	6.4±0.2
T	0.5±0.15	0.5±0.15	0.5±0.15	0.5±0.2
a	1.0±0.2	1.7±0.2	2.1±0.2	2.7±0.2
b	0.55±0.2	0.9±0.2	1.2±0.2	0.4±0.2