ALMP25

Features

Proprietary processing technique produces extremely low resistance values
Very low inductance
Low thermal EMF
Metallic Material
AEC-Q200 qualified available

Numbering System

ALMP25

Parameter	Standard
Power Rating	1mΩ~100mΩ: 3W 101mΩ~500mΩ : 2W
Resistance Value	1~500mΩ
Operating Temperature Range	-55 to +170°C
Component Temperature Coefficient (TCR)	± 50 ppm/°C
Maximum Working Voltage (V)	(P x R)^1/2
Rating Current (A)	(P / R)^1/2

P=Power Rating; R=Resistance vaIue

Standard Electrical Specifications

Type	Rating Power at 70℃	T.C.R. (ppm/℃)	Resistance Range(mΩ) 0.5%（D） 1.0%（F） 2.0%（G） 5.0%（J）	Meterial	Electrode	Operating Temperature(℃)
ALMP25	2W	50	101-500	R101- R500:Karma	R101-R500:Narrow	-55~+170°C
	2W&3W	50	1-4	R001- R004: Alloy	R001-R004:Wide
	2W&3W	50	1-100	R001-R100: Alloy	R002-R100:Narrow

Resistance Values of the 2512 Series, 2W Resistors

Standard Resistance Values(Ω)
0ohm	0.002ohm	0.003ohm	0.004ohm	0.005ohm	0.01ohm	0.015ohm	0.02ohm	0.025ohm	0.03ohm	0.033ohm	0.035ohm	0.05ohm	0.06ohm	0.08ohm	0.1ohm
R000	R002	R003	R004	R005	R010	R015	R020	R025	R030	R033	R035	R050	R060	R080	R100
0.15ohm	0.2ohm	0.3ohm	0.5ohm	—
R150	R200	R300	R500	—

Manufacturable Resistance Values(Ω)
0.001ohm	0.0012ohm	0.0015ohm	0.0025ohm	0.0035ohm	0.0038ohm	0.0045ohm	0.006ohm	0.007ohm	0.008ohm	0.009ohm	0.011ohm	0.012ohm	0.013ohm	0.016ohm	0.017ohm
R001	R0012	R0015	R0025	R0035	R0038	R0045	R006	R007	R008	R009	R011	R012	R013	R016	R017
0.018ohm	0.022ohm	0.024ohm	0.027ohm	0.036ohm	0.039ohm	0.04ohm	0.043ohm	0.045ohm	0.047ohm	0.056ohm	0.062ohm	0.065ohm	0.068ohm	0.07ohm	0.075ohm
R018	R022	R024	R027	R036	R039	R040	R043	R045	R047	R056	R062	R065	R068	R070	R075
0.082ohm	0.09ohm	0.11ohm	0.12ohm	0.13ohm	0.14ohm	0.16ohm	0.17ohm	0.18ohm	0.22ohm	0.24ohm	0.25ohm	0.27ohm	0.33ohm	0.36ohm	0.39ohm
R082	R090	R110	R120	R130	R140	R160	R170	R180	R220	R240	R250	R270	R330	R360	R390
0.4ohm	0.43ohm	0.45ohm	0.47ohm	—
R400	R430	R450	R470	—

Resistance Values of the 2512 Series,3W Resistors

Standard Resistance Values(Ω)
0ohm	0.002ohm	0.003ohm	0.004ohm	0.005ohm	0.01ohm	0.015ohm	0.02ohm	0.025ohm	0.03ohm	0.033ohm	0.035ohm	0.05ohm	0.06ohm	0.08ohm	0.1ohm
R000	R002	R003	R004	R005	R010	R015	R020	R025	R030	R033	R035	R050	R060	R080	R100

Manufacturable Resistance Values(Ω)
0.001ohm	0.0012ohm	0.0015ohm	0.0025ohm	0.0035ohm	0.0038ohm	0.0045ohm	0.006ohm	0.007ohm	0.008ohm	0.009ohm	0.011ohm	0.012ohm	0.013ohm	0.016ohm	0.017ohm
R001	R0012	R0015	R0025	R0035	R0038	R0045	R006	R007	R008	R009	R011	R012	R013	R016	R017
0.018ohm	0.022ohm	0.024ohm	0.027ohm	0.036ohm	0.039ohm	0.04ohm	0.043ohm	0.045ohm	0.047ohm	0.056ohm	0.062ohm	0.065ohm	0.068ohm	0.07ohm	0.075ohm
R018	R022	R024	R027	R036	R039	R040	R043	R045	R047	R056	R062	R065	R068	R070	R075
0.082ohm	0.09ohm	—
R082	R090	—

Construction

ALMP25

Unit: Millimeters

Type	Power	L	W	C	T
ALMP25	2W&3W	6.4 ±0.2	3.2 ±0.2	0.95±0.25 (Narrow)
				0.95±0.25 (Narrow)	0.9±0.2
				2.1±0.25(Wide)	0.9±0.2

Marking

For ALMP25-S(Wide electrodes)

(1) R≤4mΩ & P/N with "-S", the marking pattern is as follows.

ALMP25

Resistance value is expressed by 4 digits.

E.G.:

R002 = 0.002Ω = 2mΩ

R004 = 0.004Ω = 4mΩ

For ALMP25(Narrow electrodes)

(1) R>1mΩ & P/N without "-S", the marking pattern is as follows.

ALMP25

Resistance value is expressed by 4 digits.

E.G.:

R010 = 0.010Ω = 10mΩ

R020 = 0.020Ω = 20mΩ

Recommend land pattern

ALMP25

Unit: Millimeters

Resistance Range ( Ω )	a	b	L
0.001-0.004(Wide)	4.0±0.1	3.1±0.1	1.3±0.1
0.001~0.500(Narrow)	4.0±0.1	2.1±0.1	4.1±0.1

Power Derating Curve

For resistors operated in ambient temperatures 70°C, power ratingshall be derated inaccording with the curve below:

ALMP25

Recommended Solder Curve

ALMP25

Reflow Condition		Pb – Free assembly
Pre heat	- Temperature Min (T_s(min))	150°C
	- Temperature Max (T_s(max))	200°C
	- Time (Min to Max) (t_s)	60 – 120 secs
Average ramp up rate (Liquidus Temp (T_L) to peak		5°C/second max
T_S(max) to TL - Ramp-up Rate		5°C/second max
Reflow	- Temperature (T_L) (Liquidus)	217°C
Reflow	- Time (t_L)	60 – 150 seconds
Peak Temperature (T_P)		260°C
Time within 5°C of actual peak Temperature (t_p)		20 – 40 seconds
Ramp-down Rate		5°C/second max
Time 25°C to peak Temperature (T_P)		8 minutes Max.
Wave Soldering		260°C, 10 seconds max.
Hand Soldering		350°C, 5 seconds max.

Product Characteristics

Item	Test condition/Methods			Limited	Standard
Resistance	Measuring resistance value at room temperayure 25℃±5℃			Refer to Spec	IEC60115-14.5
Temperature coefficient of resistance	TCR=(R-R。)/R。(T2-T1)×10⁶ R₀ :resistance of roomtemperature R:resistance of 125℃ T1:Room temperature T2:Temperature at 125℃			Refer to Spec	MIL-STD-202 Method 304
Short time Overload	Apply overload for 5 seconds,then measure the change in resistance after 24 hours of rest.			≤±0.5%	JIS-C5201
	Type	Power(W)	#of rated power
	2512	2	5 times
	2512	3	0.5mR~100mR5 times 101mR~500mR4 times
Biased Humidity	+85℃,85%RH,10%bias,1.5h"NO",0.5h" OFF",1000hours			≤±0.5%	MIL-STD-202 Method 103
Temperature Cycling	-55℃(30min)/+125℃(30min),1000 cycles			≤±0.5%	JESD22 Method JA-104
Operational Life	125℃±3℃,Apply rated current for 1000 hours			≤±0.5%	MIL-STD-202 Method 108
Low Temperature Storage	-55±2℃ for 1000hours,No power			≤±0.5%	JIS C5201
High Temperature Storage	125℃ for 1000hours,No power			≤±1%	MIL-STD-202 Method 108
Load Life	70℃±2℃,1000 hours,at rated power 1.5 hours "ON",0.5 hours "OFF"			≤±1%	MIL-STD-202 Method 210
Resistance to Solder Heat	260±5℃,10±1s			≤±0.5%	MIL-STD-202 Method 210
Solderability	Immerse in the furnace at 245±5℃for 3±1 seconds,then take it out and put it under a magnifying glass to observe the solder area			The electrode shall cover more than 95%of new tin.	J-STD-002
Joint Strength of Solder	Welded in the bending test plate,placed on the bending test machine,apply force in the center of the test plate,and measure the change rate of resistance value under load			≤±0.5%	JIS-C5201

Tapping & Package

ALMP25

Type	Pack	A ±0.2	B ±0.2	D0 +0.5-0	E ±0.1	F ±0.05	P0 ±0.1	P1 ±0.1	P2 ±0.1	W ±0.2	D1 ±0.05	T ±0.15
2512	Emboss	3.60	6.90	1.50	1.75	5.50	4.00	4.00	2.00	12.00	1.50	1.20

Reel Specification

ALMP25

Type	A	B	C	D	M	W
2512	2.00±0.5	13.50±0.5	21.00±0.5	80.00±1.0	178.00±2.0	13.80±0.5

Packaging

Quantity: 4, 000pcs

12mm wide tape on 178mm(7inch)

diameter reel -specification EIA

Standard 481.

Peel strength of upper belt

Stripping speed: 300 mm / min; The peel force is between 0.1N and 0.7N.

ALMP25

Storage conditions & shelf life

It can be stored for 2 years under closed conditions with temperature of 5 ° C ~ 35 ° C and relative humidity of 40 ~ 75

Please avoid the following harsh environment during storage to avoid affecting the product

performance and solder connectivity: the places with corrosive gases such as sea breeze, Cl2 , H2S, NH3 , SO2 and NO2 shall be stored without direct sunlight.

Precautions for product use

When measuring the resistance value before welding, a special resistance meter with high precision shall be used. When measuring, a 4-wire probe or fixture must be used. 4. When measuring parts with a wire measuring needle, the 4 measuring needles must indeed contact the parts.

Avoid damaging the protective layer during manual welding or clamping with tweezers.

When the PCB is divided or fixed on the support, be careful to avoid excessive bending causing mechanical stress to the resistor.

It shall be used within the rated power range within the specification, especially when the power exceeds the rated value, which may affect the reliability of the product

ALMP25

Features

Numbering System

Standard Electrical Specifications

Resistance Values of the 2512 Series, 2W Resistors

Resistance Values of the 2512 Series,3W Resistors

Construction

Unit: Millimeters

Marking

For ALMP25-S(Wide electrodes)

For ALMP25(Narrow electrodes)

Recommend land pattern

Unit: Millimeters

Power Derating Curve

Recommended Solder Curve

Product Characteristics

Tapping & Package

Reel Specification

Packaging

Peel strength of upper belt

Storage conditions & shelf life

Precautions for product use

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