1. Home
  2. Products
  3. Metal Current Sense Resistors
  4. Metal Alloy Current Shunt Resistors

PSRP25 Shunt Resistors

PSRP-S Series-Prosemi Shunt Resistors

Features

  • Metal Alloy Low-Resistance shunt resistor.
  • Resistance value 0.5mΩ, 1mΩ, 1.5mΩ, 2mΩ, 2.5mΩ, 3mΩ, 4mΩ.
  • Low thermal EMF.
  • Low TCR.
  • Very low inductance.
  • Halogen free, lead free and RoHS compliant.
  • AEC-Q200 qualified available.

Applications

  • Power modules.
  • Frequency converters.
  • Current sensor for power hybrid sources high current for automotive.
  • Lithium battery protection board.

Part Number

PSRP25

【1】Series Name: Prosemi Shunt Resistor.
【2】Chip Size: 25: 2512, 39: 3921.
【3】Material: M:CuMn, K: NiCr.
【4】Power Rating: 7=7W, 6=6W.
【5】Resistance Precision: D: ±0.5%, F: ±1%, G: ±2%, J: ±5%.
【6】Resistance Code: 0M50: 0.5mΩ, R001: 1mΩ, R0015: 1.5mΩ.
【7】Internal code

Electrical Characteristics

Size Power
Rating at
70℃*
(W)		 Resistance
Range(mΩ)**		 Element
Material		 Resistance
Tolerance
(%)		 Operation
Temperature
Range		 25℃~125℃
Temperature
coefficient (ppm/℃)
2512  7  1  K ±0.5%;±1%;
±2%;±5%		 -55℃
~+170℃		 ±25
6  1.5  K ±25
6  2.5  K ±25
3921  9  0.5  M ±50
“*” : Power at terminal temperature of 70℃.
“* *”: Development schedule will vary depending on resistance value. Please contact us for resistance values.

Resistance Values of the 2512 Series, 4~6W Resistors

Standard Resistance Values ( Ω )
0.0003 ohm 0.0005 ohm 0.001 ohm 0.002 ohm 0.003 ohm 0.004 ohm
0M30 0M50 R001 R002 R003 R004
Manufacturable Resistance Values ( Ω )
0.0002 ohm 0.0015 ohm 0.0025 ohm 0.005 ohm
0M20 R0015 R0025 R005

Physical Dimensions

PSRP25

Unit: mm

Size Resistance
(mΩ)		 L W D A P Element
Material
2512  1  6.4±0.2 3.2±0.2 1.4±0.2 2.0±0.3 ≥0.2 K
1.5  1.0±0.2 K
2.5  0.8±0.2 K
3921  0.5  10.0±0.2 5.2±0.2 1.6±0.2 2.0±0.3 ≥0.3 M

Recommended Solder Pad Layout

PSRP25

Unit: mm

Type L a b
2512  2.0  2.8  3.5 
3921  5.6  2.7  6.2 

Construction

PSRP25

Power Derating Curve

For resistors operated in ambient temperatures 70°C, power rating shall be derated in according with the curve below:

PSRP25

Recommended Solder Curve

PSRP25

Reflow Condition Pb – Free assembly
Pre heat - Temperature Min (Ts(min)) 150°C
- Temperature Max (Ts(max)) 200°C
- Time (Min to Max) (ts) 60 – 120 secs
Average ramp up rate (Liquidus Temp (TL) to peak) 5°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Time (tL) 60 – 150 seconds
Peak Temperature (TP) 260°C
Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds
Ramp-down Rate 5°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Wave Soldering Not applicable
Hand Soldering 350°C, 5 seconds max.

Marking Instructions

PSRP is marked with three or four digit, We have two different ways of marking：
a. “R” designates the decimal location in ohms,
e. g. For PSRP39: 1mΩ: R001； For PSRP25：1mΩ: 001, 1.5mΩ: 0015, 2.5mΩ: 0025
b. “m” designates the decimal location in milliohms,
e. g. For PSRP39：0.5mΩ: 0m50；

Product Characteristics

Item Test condition/Methods Limited Standard
Resistance Measuring resistance value at room temperature
25℃±5℃		 Refer to
Spec		 IEC60115-14.5
Temperature
Coefficient of
Resistance		 TCR(ppm/℃)=(R2-R1/R1*(T2-T1))X  10⁶
R1:resistance value measured at room
temperature(Ω)
R2:Resistance measured at 125°C(Ω)
T1:room temperature(°C)
T2:125℃		 Refer to
Spec		 IEC 60115-14.8
Short Time
Overload		 Apply 5 times rated power for 5 seconds,and
measure the resistance change after standing for
24 hours.		 ≤±0.5% IEC 60115-14.13
High Temperature
Storage		 170℃ for 1000 hours,No power. ≤±1% MIL-STD-202
Method 108
Temperature
Cycling		 Pre-treatments with 3X reflow,  -55 ℃
(15min)/+150℃(15min),1000 cycles,transition
time less than 1 minute		 ≤±0.5% JESD22-A104
Bias Humidity Pre-treatments with 3X reflow,+85℃,85%RH,
10%of operating power,1000hours		 ≤±0.5% MIL-STD-202
Method103
Operational life Pre-treatments with 3X reflow,70℃±2℃,1000
hours,at rated power 1.5 hours “ON”,0.5 hours
“OFF”.		 ≤±1% MIL-STD-202
Method 108
Mechanical shock Condition C,100 g's,6 msec,3 mutually
perpendicular axes,in 6 directions,three impacts
each for a total of 18 times 18 shocks.		 ≤±0.5% MIL-STD-202
Method 213
Vibration 5g's for 20 minutes
12 cycles each of 3 orientations.
Test from 10 Hz-2000 Hz		 ≤±0.5% MIL-STD-202
Method 204
Resistance to
Soldering Heat		 Condition K,temperature above 217℃,60s-150s ≤±0.5% MIL-STD-202
Method 210
Solderability 245±5℃ time:5sec+0/-0.5sec. ≥95% J-STD-002

Packaging

Tape Dimensions

PSRP25

Unit: mm

Series Type A B D0 E F φD1
2512  1-1.5mΩ 3.60±0.10 6.70±0.10 1.50+0.10 1.75±0.10 5.50±0.05 1.50±0.10
2.5mΩ 3.50±0.10 6.74±0.10 1.50+0.10 1.75±0.10 5.50±0.05 1.50±0.10
3921  0.5mΩ 5.70±0.10 10.50±0.10 1.50+0.10/0 1.75±0.10 7.50±0.1 /
Series Type W PO P1 P2 T
2512  1-1.5mΩ 12.00±0.30 4.00±0.10 8.00±0.10 2.00±0.05 1.60±0.10
2.5mQ 12.00±0.30 4.00±0.10 8.00±0.10 2.00±0.05 1.10±0.10
3921 0.5mΩ 16.00±0.30 4.00±0.10 8.00±0.10 2.00±0.10 2.250±0.10

Reel Dimensions

 

PSRP25

3921

PSRP25

2512

 

Unit: mm

Series Type W M A B C D
2512  7'reel 13.8±0.5 178.0±2.0 2.0±0.5 13.5±0.5 21.0±0.5 80.0±1.0
Series Type W M ΦA N H1 B
3921  13'reel 16.4+3.5/-0.2 330.0±2.0 13.4±0.5 100.0±0.2 16.4±1.0 2.4±0.4

Quantity of Package

Type Quantity(pcs)
2512  1-1.5mΩ:1000
2.5mΩ:2000
3921  0.5mΩ:2000

Storage

1. The temperature condition must be controlled at 25 ±5℃, The R.H. must be controlled at 60 ±15% Store in accordance with this requirement, and the validity period is two years after the date of manufacture.

2. Please avoid the mentioned harsh environment below when storing to ensure product performance and its’ solderability. Places exposed to sea breeze or other corrosive gas, such as Cl2 , H2S, NH3 , SO2 and NO2.

3. When the product is moved and stored, please ensure the correct orientation of the box. Do not drop or squeeze the box. Otherwise, the electrode or the body of the product may be

damaged.

PROSEMI TECHNOLOGY

SEND A MESSAGE

Feel free to fill out our contact form below and our support team will get back to you within 24 hours.