Current Sensing Metal Chip Resistors (CSM)

Metal Chip Resistor (CSM) Introduction

New Ultra-low Ohmic Chip Resistors for Current Detection in power electronic systems.

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  • Current Sensing Metal Chip Resistor (CSM)

Current sense resistors are a rapidly evolving technology that focuses on regulating and monitoring power from the power supply to the end equipment.

In addition, current sensing resistors based on Token (CSM) metal alloys are capable of handling higher inrush currents, have better TCR capability, and generally do not suffer from differences in thermal expansion from the PCB. Metal alloy based resistors are a cost-effective solution compared to competing technologies including Hall effect sensors, magnetoresistive sensors and current transformers.

Token (CSM) provides high performance and reliability over the entire operating temperature range, with a small enclosure size and high power rating compared to standard current sense resistors. Resistance value starts at 1mΩ and goes to 700mΩ, applications include switches and DC-DC converters, battery packs, chargers, adapters, overcurrent protection in audio applications, power management applications, LED drivers, motor control, electric Tools and power amplifiers.

Ultra low resistance metal chip resistors (CSM) are SMD devices designed for current sensing circuits in power electronics systems. The metal alloy construction ensures high reliability and high performance with a very low and stable TCR (50ppm, 75ppm, 100ppm) value. The small chip size provides high power ratings from 0.5W to 5W and operates from -55°C to +155°C temperature. Accuracy tolerances are ±0.5% and ±1%.

There are many options of popular industry sizes: 0603, 0805, 1206, 2010, 2512, 3921, 4527, 0508, 0612, 0815, 1225, and 2139. 5K pcs per reel in smaller sizes 0603, 0805, 1206, 0508, and 0612. 4K pcs per reel for 2010, 2512, 0815, and 1225. 2K pcs per reel for 2139.

Ultra-low ohmic chip resistors (CSM) for current detection meet RoHS standards and lead-free requirements. Customers can specify resistance, size and specifications to satisfy the design challenges and specific technical requirements. Please contact TOKEN Business Department for the latest product information.

Downloads Complete Specification PDF : (CSM) Current Sensing Metal Chip Resistor.

Features :
  1. RoHs compliant and halogen free.
  2. High precision current sensing and voltage division.
  3. High power rating in small size. Excellent long term stability.
  4. Metal foil construction low Resistance TCR/Inductance/EMF (only for MnCu).
Applications :
  1. Charger, Measuring instrument. Switching Power Supply.
  2. Battery Management System. Power Management Applications.
  3. DC-DC Converter, Adaptor, Voltage Regulation Module (VRM).
  4. Battery Pack, Over Current Protection in Audio Applications.

CSM - Construction & Dimensions

New Ultra-low Ohmic Chip Resistors
Surface Mount (CSM) Construction
Alumina Substrate External Electrode
Bottom Electrode Adhesive
Top Electrode Resistor Layer
Edge Electrode Primary Overcoat
Barrier Layer Marking
Type Power Rating at 70°C (W) Resistance Range (mΩ) Dimensions (Unit: mm)
L W T D
CSM0603 0.5 5 1.60±0.25 0.80±0.25 0.65±0.20 0.50±0.20
6~100 0.40±0.20
CSM0805 0.75 4~270 2.00±0.25 1.20±0.25 0.65±0.20 0.50±0.20
CSM1206 1 4~700 3.20±0.25 1.60±0.25 0.65±0.20 0.68±0.30
CSM2010 1.5 2~3 5.08±0.25 2.54±0.25 0.65±0.20 2.10±0.30
4~500 0.70±0.30
CSM2512 2 2 6.40±0.30 3.20±0.30 0.75±0.20 1.65±0.30
3 0.75±0.20 1.65±0.30
4~560 0.65±0.20 1.05±0.30
CSM3921 4 10~50 11.10±0.30 5.10±0.30 0.65±0.30 2.36±0.30
CSM4527 5 10~50 11.60±1.0 7.10±1.0 0.65±0.30 2.70±0.40
CSM0508 1 1~100 1.35±0.20 2.10±0.20 0.65±0.20 0.43±0.20
CSM0612 1.5 1 1.60±0.25 3.20±0.25 0.65±0.20 0.50±0.30
2~100 0.40±0.20
CSM0815 2 1~20 2.20±0.20 3.80±0.20 0.65±0.20 0.61±0.20
CSM1225 3 1~100 3.20±0.30 6.40±0.30 0.65±0.20 0.60±0.20
CSM2139 5 1~100 5.10±0.40 11.10±0.30 0.65±0.30 0.90±0.30

CSM - Electrical Characteristics

Type Max. Rating Power (W) Max. Rating Current (A)* Max. Overload Current (A) Resistance Range (mΩ)* TCR (ppm/°C) Material
D (±0.5%) F (±1%)
CSM0603 0.5 10 15.81 - 5~9 ±75 R005~R049: MnCu
R050~R100: Cu Alloy
7.07 11.18 10~100 ±50
CSM0805 0.75 13.69 21.65 - 4~9 ±75 R004~R049: MnCu
R050~R270: Cu Alloy
8.66 13.69 10~270 ±50
CSM1206 1 15.81 25 - 4~9 ±75 R004~R049: MnCu
R050~R700: Cu Alloy
10 15.81 10~700 ±50
CSM2010 1.5 27.38 43.30 - 2~9 ±100 R002~R500: Cu Alloy
12.24 19.36 10~500 ±50
CSM2512 2 31.62 50 - 2~9 ±75 R002~R049: MnCu
R050~R560: Cu Alloy
14.14 22.36 10~560 ±50
CSM3921 4 20 31.62 10~50 ±50 R010~R050: Cu Alloy
CSM4527 5 22.36 35.35 10~50 ±50 R010~R050: Cu Alloy
CSM0508 1 31.62 50 - 1~9 ±100 R001~R009: MnCu
R010~R100: Cu Alloy
10 15.81 10~100 ±50
CSM0612 1.5 38.72 61.23 - 1~9 ±100 R001~R009: MnCu
R010~R100: Cu Alloy
12.24 19.36 10~100 ±50
CSM0815 2 44.72 70.71 - 1~9 ±100 R001~R020: Cu Alloy
14.14 22.36 10~20 ±50
CSM1225 3 54.77 86.60 - 1~9 ±100 R001~R020: MnCu
R021~R100: Cu Alloy
17.32 27.38 10~100 ±50
CSM2139 5 111.80 70.71 - 1~9 ±100 R001~R020: MnCu
R021~R100: Cu Alloy
22.36 35.35 10~100 ±50

∗ Operating Temperature -55°C ~ +155°C

CSM - Environmental Characteristics

Item Specification Test Method
Temperature Coefficient of Resistance (T.C.R) As Spec. JIS-C-5201-1 4.8
IEC-60115-1 4.8
-55°C~+125°C, 25°C is the reference temperature.
Short Time Overload ±(1.0% + 0. 5mΩ) JIS-C-5201-1 4.13
IEC 60115-1 4.13
RCWV*2.5 or Max Overloading Voltage 5sec.
Solderability 95% Min. coverage. JIS-C-5201-1 4.17
IEC-60115-1 4.17
245±5°C for 3 seconds.
Resistance to Soldering Heat ±(1.0% + 0.5mΩ) JIS-C-5201-1 4.18
IEC-60115-1 4.18
260±5°C for 10 seconds.
Temperature Cycling ±(1.0% + 0.5mΩ) JIS-C-5201-1 4.19
IEC-60115-1 4.19
-55°C to +155°C, 100 cycles.
Dry Heat ±(1.0% + 0.5mΩ) JIS-C-5201-1 4.23
IEC-60115-1 4.23.2
At +155°C for 1000 Hrs.
Damp Heat with Load ±(2.0% + 0.5mΩ)
JIS-C-5201-1 4.24
IEC-60115-1 4.24
40±2°C,90~95% R.H., load with rated current for 1000 Hrs. with 1.5 Hrs. ”ON” and 0.5 Hrs. “OFF”.
Endurance ±(2.0% + 0. 5mΩ) JIS-C-5201-1 4.25
IEC-60115-1 4.25.1
70±2°C, load with rated current for 1000 Hrs. with 1.5 Hrs. ”ON” and 0.5 Hrs. “OFF”.
Bending Strength ±(1.0% + 0.5mΩ) JIS-C-5201-1 4.33
IEC-60115-1 4.33
Bending once for 5 seconds with 2mm .

CSM - Recommend Land Pattern

(CSM) Recommend Land Pattern
(CSM) Recommend Land Pattern
Type Maximum Power Rating (Watts) Resistance Range (mΩ) Dimensions (mm)
a b i
CSM0603 0.5 5 1.35 0.92 0.50
6~100 1.30 0.92 0.60
CSM0805 0.75 4~270 1.40 1.44 0.80
CSM1206 1 4~700 1.80 1.84 1.20
CSM2010 1.5 2~3 3.65 2.88 0.70
4~500 2.65 2.88 2.70
CSM2512 2 2~3 3.85 3.57 1.60
4~560 3.10 3.57 3.10
CSM3921 4 10~50 4.50 5.75 5.00
CSM4527 5 10~50 4.65 8.05 5.20
CSM0508 1 1~100 1.10 2.30 0.60
CSM0612 1.5 1 1.35 3.68 0.50
2~100 1.30 3.68 0.60
CSM0815 2 1~20 2.40 4.26 0.70
CSM1225 3 1~100 2.35 7.25 1.40
CSM2139 5 1~100 2.80 12.65 2.40

CSM - Derating Curve

Rated power VS Ambient temperature (Power Derating Cruve)
Rated power VS Ambient temperature (Power Derating Cruve)

CSM - IR Reflow Soldering

IR Reflow Soldering
IR Reflow Soldering

CSM - Wave Soldering (Flow Soldering)

Wave Soldering (Flow Soldering)
Wave Soldering (Flow Soldering)
Remark :
  • Time of IR reflow soldering at maximum temperature point 260°C:10s.
  • Time of wave soldering at maximum temperature point 260°C:10s.
  • Time of soldering iron at maximum temperature point 410°C:5s.

CSM - Paper Tape Specifications

CSM - Paper Tape Specifications
Paper Tape Specifications
Type A(mm) B(mm) W(mm) E(mm) F(mm) P0(mm) P1(mm) P2(mm) ΦD0(mm) T(mm)
CSM0603 1.18±0.20 1.98±0.20 8.00±0.30 1.75±0.10 3.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.75±0.20
CSM0805 1.68±0.20 2.38±0.20 8.00±0.30 1.75±0.10 3.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.87±0.20
CSM0508 1.68±0.20 2.38±0.20 8.00±0.30 1.75±0.10 3.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.87±0.20
CSM1206 2.05±0.20 3.65±0.20 8.00±0.30 1.75±0.10 3.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.87±0.20
CSM0612 2.05±0.20 3.65±0.20 8.00±0.30 1.75±0.10 3.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.87±0.20

Embossed Plastic Tape Specifications

Paper Tape Specifications
Paper Tape Specifications
Type A(mm) B(mm) W(mm) E(mm) F(mm) P0(mm) P1(mm) P2(mm) ΦD0(mm) T(mm)
CSM1508 2.40±0.20 4.10±0.20 12.0±0.30 1.75±0.10 5.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.75±0.20
CSM2010 2.85±0.20 5.45±0.20 12.0±0.30 1.75±0.10 5.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 0.80±0.20
CSM2512 3.40±0.20 6.75±0.20 12.0±0.30 1.75±0.10 5.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 1.00±0.20
CSM1225 3.40±0.20 6.75±0.20 12.0±0.30 1.75±0.10 5.50±0.10 4.0±0.10 4.00±0.10 2.00±0.10 1.50+0.1,-0 1.00±0.20
CSM3921 5.50±0.20 11.5±0.20 24.0±0.30 1.75±0.10 11.5±0.10 4.0±0.10 8.00±0.10 2.00±0.10 1.50+0.1,-0 0.90±0.20
CSM2139 5.50±0.20 11.5±0.20 24.0±0.30 1.75±0.10 11.5±0.10 4.0±0.10 8.00±0.10 2.00±0.10 1.50+0.1,-0 0.90±0.20
CSM4527 7.50±0.20 12.0±0.20 24.0±0.30 1.75±0.10 11.5±0.10 4.0±0.10 12.0±0.10 2.00±0.10 1.50+0.1,-0 0.90±0.20

Reel Specifications and Packaging Quantity

Reel Dimensions
Reel Dimensions
Type Packaging Quantity Tape width Reel Diameter ΦA(mm) ΦB(mm) ΦC(mm) W(mm) T(mm)
CSM0603 5000Pcs 8mm 7inch 178±5.0 60±2.0 13.0±1.0 9.0±1.0 11.4±1.0
CSM0805 5000Pcs 8mm 7inch 178±5.0 60±2.0 13.0±1.0 9.0±1.0 11.4±1.0
CSM1206 5000Pcs 8mm 7inch 178±5.0 60±2.0 13.0±1.0 9.0±1.0 11.4±1.0
CSM2010 4000Pcs 12mm 7inch 178±5.0 60±2.0 13.0±1.0 13.0±1.0 15.5±1.0
CSM2512 4000Pcs 12mm 7inch 178±5.0 60±2.0 13.0±1.0 13.0±1.0 15.5±1.0
CSM3921 2000Pcs 24mm 7inch 178±5.0 60±2.0 13.0±1.0 24.5±1.0 26.5±1.0
CSM4527 1000Pcs 24mm 7inch 178±5.0 60±2.0 13.0±1.0 24.5±1.0 26.5±1.0
CSM0508 5000Pcs 8mm 7inch 178±5.0 60±2.0 13.0±1.0 9.0±1.0 11.4±1.0
CSM0612 5000Pcs 8mm 7inch 178±5.0 60±2.0 13.0±1.0 9.0±1.0 11.4±1.0
CSM0815 4000Pcs 12mm 7inch 178±5.0 60±2.0 13.0±1.0 13.0±1.0 15.5±1.0
CSM1225 4000Pcs 12mm 7inch 178±5.0 60±2.0 13.0±1.0 13.0±1.0 15.5±1.0
CSM2139 2000Pcs 24mm 7inch 178±5.0 60±2.0 13.0±1.0 24.5±1.0 26.5±1.0

Order Codes (CSM)

CSM 0603 F TR D U R015 M
Product Type
CSM
Dimensions (L×W) (mm)
0603 1.60x0.80
0805 2.00x1.20
1206 3.20x1.60
2010 5.08x2.54
2512 6.40x3.20
3921 11.10x5.10
4527 11.60x7.10
0508 1.35x2.10
0612 1.60x3.20
0815 2.20x3.80
1225 3.20x6.40
2139 5.10x11.10
Power Rating (W)
W 1/8W
V 1/4W
O 1/3W
U 1/2W
Q 3/4W
T 1W
A 1.5W
S 2W
4 4W
5 5W
Resistance (Ω)
R015 0.015Ω
R050 0.05Ω
R010 0.01Ω
Tolerance (%)
D ±0.5%
F ±1%
TCR (PPM/°C)
D ±50ppm/°C
W ±75ppm/°C
E ±100ppm/°C
Marking
M MnCu
C Cu Alloy
Package
TR Taping Reel