Ultra Low Ohm (Metal Strip) Chip Resistor (LR Series LR12JTK3M50)

LR12JTK3M50

metal resistors

Metal strip ultra low ohm resistor for sensing large current , withstand high temperature. Low TCR for stable resistance drift through high temp.
LR Series2512 ±5% 150 1W Series3.5mΩ

Size	Tolerance	TCR (ppm /℃)	Power	Resistance (Ohm)
2512	±5%	150	1W	3.5m

High Power Rating Electrical Specifications

Resistance codes example

Environmental Characteristics

Endurance

Item/th>	Requirement	Test Method
Temperature Coefficient of Resistance (T.C.R.)	As Spec.	MIL-STD-202 Method 304 +25~125°C, 25°C is the reference temperature
Short Time Overload	±0.5%	JIS-C-5201-1 5.5 5*rated power for 5 seconds
±1%	MIL-STD-202 Method 108A 70±2°C, RCWV for 1000 hrs with 1.5 hrs “ON” and 0.5 hr “OFF”
Dry Heat	±1%	JIS-C-5201-1 7.2 at +170°C for 1000 hrs
Solderability	95% min. coverage	MIL-STD-202 Method 208H 245±5°C for 3 seconds
Resistance to Soldering Heat	±0.5%	MIL-STD-202 Method 210E 260±5°C for 10 seconds
Thermal Shock	±0.5%	MIL-STD-202 Method 107G -55°C ~ 150°C, 100 cycles

RCWV(Rated Continuous Working Voltage)= √(P*R) or Max. Operating Voltage whichever is lower.
☑ Storage Temperature: 15~28°C; Humidity < 80%RH

Reflow

☑ Green coating ”Reflow Air Convection ”is available
☑ Green coating can't be working with wave soldering bath

Measurements

1. LR12 4-wire precision measurement (Black Coating)
■ Equipment: ADEX AX-1152D DC Low Ohm Meter
■ Excitation Current: 3A (0.5mΩ~1.5 mΩ)
                      1A (2mΩ~10mΩ)

2. LR12 4-wire pad layout (recommended for precision current sensing)
■ Note: No circuits between pads to avoid short circuit

3. LR12 2-wire pad layout
■ Note: No circuits between pads to avoid short circuit

Packaging

Embossed Plastic Tape Specifications

Type	Resistance (mΩ)	A	B	W	E	F	P0	P1	P2	ΦD0	ΦD1	T	Quantity (EA)
LR06	0.5 - 10	1.90±0.1	3.60±0.1	8.0±0.2	1.75±0.1	3.5±0.05	4.0±0.1	4.0±0.1	2.0±0.05	1.55±0.05	1.0min.	0.87±0.1	2,000
LR10	0.5 - 10	2.85±0.1	5.55±0.1	12.0±0.2	1.75±0.1	5.5±0.05	4.0±0.1	4.0±0.1	2.0±0.05	1.55±0.05	1.4min.	0.85±0.1	2,000
LR12	0.50 - 0.75	3.40±0.1	6.75±0.1	12.0±0.1	1.75±0.1	5.5±0.05	4.0±0.1	4.0±0.1	2.0±0.05	1.55±0.05	1.4min.	1.45±0.2	2,000
	1 - 10											0.81±0.1

1. The cumulative tolerance of 10 sprockets hole pitch is ± 0.2mm.
2. Carrier camber shall be not more than 1mm per 100mm through a length of 250mm.
3. A & B measured 0.3mm from the bottom of the packet.
4. T measured at a point on the inside bottom of the packet to the top surface of the carrier.
5. Pocket position relative to sprocket hole is measured as the true position of the pocket and not the pocket hole.

Code

• 3M50

Files Download

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  Data Sheet

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  Ultra Low Ohm (Metal Strip) Chip Resistor - LR Series

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• metal resistors