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KOA SR732BTTDR270F low resistance flat chip resistor for current detection in power supply circuits

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KOA SR732BTTDR270F low resistance flat chip resistor for current detection in power supply circuits

Resistance : 270mΩ

Temperature Coefficient : ±100ppm/℃

Operating Temperature : -55℃~+150℃

Type : Thick Film Resistor

Tolerance : ±1%

Description : 270mΩ ±100ppm/℃ Thick Film Resistor ±1% 1206 Chip Resistor - Surface Mount RoHS

Mfr. Part # : SR732BTTDR270F

Model Number : SR732BTTDR270F

Package : 1206

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Product Overview

The SR73 series are low resistance flat chip resistors designed for current detection in power supply and motor circuits. They offer high reliability and performance with a resistance tolerance of 0.5% and a temperature coefficient of 10010^-6/K. These resistors are suitable for both reflow and flow solderings and meet EU-RoHS requirements for lead-free termination. They are AEC-Q200 qualified (except for the 1H type).

Product Attributes

Brand: KOA
Product Line: SR73
Type: Low Resistance Flat Chip Resistors
Certifications: IEC 60115-8, JIS C 5201-8, EIAJ RC-2134C, AEC-Q200 (Exemption 1H)
Environmental Compliance: EU-RoHS
Coating Color: Black (1H), Indigo (1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2)
Terminal Surface Material: Lead-free plating is standard. Gold plated electrodes available for 1J, 2A, 2B (0.1~10). Type 1H, W2H, W3A, W3A2 only support 'T' terminal surface material.

Technical Specifications

Type (Inch Size Code)	Dimensions (mm) L x W x t	Power Rating	Rated Ambient Temp. ()	Rated Terminal Part Temp. ()	Resistance Tolerance	T.C.R. (10^-6/K)	Resistance Range ()	Taping & Qty /Reel (pcs)	Weight (g/1000pcs)
1H (0201)	0.60.03 x 0.30.03 x 0.230.03	0.1W	70		D:0.5% F:1%	0~+4000	110	TCM: 15,000	0.14
1E (0402)	1.0 x 0.5 x 0.350.05	0.166W	70	125	D:0.5% F:1% G:2% J:5%	2000 3000 5000	0.110.0	TPL: 20,000 TP: 10,000	0.68
1J (0603)	1.60.2 x 0.8 x 0.450.1	0.2W	70	125	D:0.5% F:1% G:2% J:5%	2000	0.110.	TP: 10,000 5,000	2.14
1J (0603)	1.60.2 x 0.8 x 0.450.1	0.25W	70	125	D:0.5% F:1% G:2% J:5%	2000	0.11	TP: 10,000 5,000	2.14
2A (0805)	2.00.2 x 1.250.1 x 0.50.1	0.33W	70	125	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.0310.	TP: 10,000 5,000 4,000	4.54
2A (0805)	2.00.2 x 1.250.1 x 0.50.1	0.5W 5		105	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.0310.		4.54
2B (1206)	3.20.2 x 1.60.2 x 0.60.1	0.33W	70	125	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.0310.	5,000 4,000	9.14
2B (1206)	3.20.2 x 1.60.2 x 0.60.1	0.5W 5		110	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.0310.		9.14
2E (1210)	2.60.2 x 2.60.2 x 0.60.1	0.5W	70	125	D:0.5% F:1% G:2% J:5%	1000 2000 5000 1000	0.02410.0	5,000 4,000	15.50
2E (1210)	2.60.2 x 2.60.2 x 0.60.1	0.66W 5		110	D:0.5% F:1% G:2% J:5%	1000 2000 5000 1000	0.02410.0		15.50
W2H (2010)	5.00.2 x 2.50.2 x 0.650.15	0.75W	70	125	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.03310.	4,000	24.30
W3A (2512)	6.30.2 x 3.10.2 x 0.70.1	1W	70	125	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.03910.	4,000	37.10
W3A2 (2512)	6.30.2 x 3.10.2 x 0.70.1	2W		95	D:0.5% F:1% G:2% J:5%	1000 2000 5000 8000	0.03910.	4,000	37.10

Features

Current detecting resistors for power supply, motor circuits, etc.
High reliability and performance with resistance tolerance 0.5%, T.C.R. 10010^-6/K.
Suitable for both reflow and flow solderings.
Products with lead-free termination meet EU-RoHS requirements.
AEC-Q200 qualified (Exemption 1H).

Applications

Car electronics, Computers, HDDs, Cellular-telephones, Power supplies, and Motor circuits, etc.

Derating Curve

For resistors operated at an ambient temperature of 70 or above, a power rating shall be derated in accordance with the derating curve. For resistors operated at terminal part temperature of described for each size or above, a power rating shall be derated in accordance with derating curve.

Precautions for Use

Cracks may occur at the solder connection due to thermal stress from differences in thermal expansion coefficients between the chip resistor and the mounting board, especially with larger types (W2H, W3A, W3A2) which have greater thermal expansion and self-heating. Careful design is required for applications with significant ambient temperature fluctuations or repeated load ON/OFF cycles.
The resistance value after soldering may change depending on the size of the pad pattern or solder amount. Verify the effect of resistance value changes before finalizing equipment design.

2410121322_KOA-SR732BTTDR270F_C186607.pdf

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