Ropla Elektronik Sp. z o.o. | Lager

Herstellerkennzeichnung Hersteller Index Ropla	Package/Case	Bearing System	Rated Voltage	Series	Maximum Airflow	Speed	Rated Current	Power	Noise Level	Leads	Options	Frame	Impeller	Tₘᵢₙ	Tₘₐₓ	Packaging	Lagervorrat	Nettopreis	MOQ Multiple
151		KF0420S2M-01R Jamicon	40x40x20	Sleeve Bearing	24V DC	KF	12.68m3/h	6200 RPM	70.8mA	1.2W	27.1dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	11,0585000 PLN	500 250
JAM0795	KF0420 S2M-01 Fan 40x40x20; 24V sleeve 12.68m3/h
152		JF0625H1M-01R Jamicon	60x60x25	HTLS	12V DC	JF	32.52m3/h	4000 RPM	200mA	2.4W	30.5dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,9771000 PLN	600 200
JAM0736	JF0625 H1M-01 Fan 60x60x25; 12V HTLS 32.52m3/h
153		FD6025S12W5-71-2N Cooltron	60x60x25	Sleeve Bearing	12V DC	FD6025-71	36.34m3/h	4000 RPM	130mA	1.56W	28.9dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,6445000 PLN	600 0
CLT0081	DC Fan 60x60x25; 12V, sleeve 36.34m3/h, two wires
Show similar
>>		JF0625S1HS00R Jamicon	60x60x25	Sleeve Bearing	12V DC	JF	36.40m3/h	4500 RPM	230mA	2.52W	34.1dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,6191000 PLN	600 200
JAM0741	JF0625 S1HS00R Fan 60x60x25; 12V sleeve 36.40m3/h
154		JF0825S2S-001-065R Jamicon	80x80x25	Sleeve Bearing	24V DC	JF	77.19m3/h	3500 RPM	170mA	3.84W	35.8dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	198 pcs on stock	10,5067000 PLN	5 1
JAM0761	Fan 80x80x25; 24V sleeve 77.19m3/h, 2 pins
155		FD4010S12W5-71-2N Cooltron	40x40x10	Sleeve Bearing	12V DC	FD4010-71	9.85m3/h	5400 RPM	60mA	0.72W	24.5dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,2010000 PLN	500 0
CLT0023	Fan 40x40x10; 12V, sleeve, 9,85m3/h, two wires
156		JF0625H1H-011R Jamicon	60x60x25	HTLS	12V DC	JF	36.85m3/h	4500 RPM	230mA	1.68W	33.4dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,1930000 PLN	600 200
JAM0735	JF0625 H1H-01R Fan 60x60x25; 12V HTLS 36.85m3/h
157		JF0825S2MS00R Jamicon	80x80x25	Sleeve Bearing	24V DC	JF	55.22m3/h	2500 RPM	130mA	2.4W	27.8dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,0826000 PLN	600 150
JAM0760	Fan 80x80x25; 24V sleeve 55.22m3/h, 3 pins
158		JF0925S1MS00R Jamicon	92x92x25	Sleeve Bearing	12V DC	JF	77.49m3/h	2500 RPM	200mA	2.04W	32.1dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,0826000 PLN	500 100
JAM0768	Fan 92x92x25; 12V sleeve 77.49m3/h, 3 pins
159		KF0510S1H-00R Jamicon	50x50x10	Sleeve Bearing	12V DC	KF	17.93m3/h	5300 RPM	158mA	1.56W	30.8dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,8388000 PLN	400 100
JAM0798	KF0510 S1H-00 Fan 50x50x10; 12V sleeve 17.93m3/h
160		JF0825S1H-001-065R Jamicon	80x80x25	Sleeve Bearing	12V DC	JF	65.78m3/h	3000 RPM	190mA	2.28W	31dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,5902000 PLN	600 150
JAM0755	JF0825 S1H-00R Fan 80x80x25; 12V sleeve 65.78m3/h
161		FD8025S12W7-71-2N Cooltron	80x80x25	Sleeve Bearing	12V DC	FD8025-71	67.92m3/h	3000 RPM	170mA	2.04W	31.3dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,5801000 PLN	500 0
CLT0036	Fan 80x80x25; 12V, sleeve, 67,92m3/h, two wires
162		JF0925S2H-001-065R Jamicon	92x92x25	Sleeve Bearing	24V DC	JF	85.93m3/h	2800 RPM	190mA	3.5W	35.1dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	15 pcs on stock by special order when stock is gone MOQ = 300 pcs multiple = 100 pcs	9,5135000 PLN	5 1
JAM0769	Fan 92x92x25; 24V sleeve 85.93m3/h, 2 pins
163		JF0615S2M-00R Jamicon	60x60x15	Sleeve Bearing	24V DC	JF	23.06m3/h	4000 RPM	110mA	2.64W	28.8dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,4322000 PLN	600 300
JAM0731	JF0615 S2M-00 Fan 60x60x15; 24V sleeve 23.06m3/h
164		JF0925S1H-00 Jamicon	92x92x25	Sleeve Bearing	12V DC	JF	88.36m3/h	2800 RPM	350mA	3.24W	35.1dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,3509000 PLN	500 100
JAM0859	Fan 92x92x25; 12V sleeve 88,36m3/h, 2 pins
165		JF0825S1HS00R Jamicon	80x80x25	Sleeve Bearing	12V DC	JF	65.78m3/h	3000 RPM	190mA	2.28W	31dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,2695000 PLN	600 150
JAM0757	JF0825 S1HS00 Fan 80x80x25; 12V sleeve 65.78m3/h
166		FD5015S12W7-61-2N Cooltron	50x50x15	Sleeve Bearing	12V DC	FD5015-61	24.79m3/h	5500 RPM	160mA	1.92W	31dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,0478000 PLN	500 0
CLT0029	Fan 50x50x15; 12V, sleeve, 24,79m3/h, two wires
167		KF0620S1H-01R Jamicon	60x60x20	Sleeve Bearing	12V DC	KF	43.06m3/h	4500 RPM	267mA	3.0W	36.2dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,0257000 PLN	600 200
JAM0806	KF0620 S1H-01 Fan 60x60x20; 12V sleeve 43.06m3/h
168		JF0515S1M-00R Jamicon	50x50x15	Dual Ball Bearing	12V DC	JF	26.06m3/h	5000 RPM	220mA	2.52W	33dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	9,0169000 PLN	600 300
JAM0728	JF0515S1M-00 Fan 50x50x15; 12V sleeve 26.06m3/h
169		KF0410S1HS01R Jamicon	40x40x10	Sleeve Bearing	12V DC	KF	10.19m3/h	6000 RPM	100mA	0.96W	28dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,8630000 PLN	500 100
JAM0832	DC Fan 40x40x10; 12V sleeve 10.19m3/h
170		JF0625S1H-00R Jamicon	60x60x25	Sleeve Bearing	12V DC	JF	36.40m3/h	4500 RPM	230mA	2.52W	35.1dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,6191000 PLN	600 200
JAM0740	JF0625 S1H-00R Fan 60x60x25; 12V sleeve 36.40m3/h
171		JF0625S1HS00R Jamicon	60x60x25	Sleeve Bearing	12V DC	JF	36.40m3/h	4500 RPM	230mA	2.52W	34.1dBA	3 Lead Wires	Tachometer	plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,6191000 PLN	600 200
JAM0741	JF0625 S1HS00R Fan 60x60x25; 12V sleeve 36.40m3/h
Show similar
>>		FD6025S12W5-71-2N Cooltron	60x60x25	Sleeve Bearing	12V DC	FD6025-71	36.34m3/h	4000 RPM	130mA	1.56W	28.9dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	10,6445000 PLN	600 0
CLT0081	DC Fan 60x60x25; 12V, sleeve 36.34m3/h, two wires
172		JF0625H2H-011-065R Jamicon	60x60x25													-10°C	70°C	Inner Box	0 pcs on stock by special order	8,5378000 PLN	600 200
JAM0737	JF0625 H2H-01 Fan 60x60x25; 24V HTLS 36.61m3/h
173		KF0410S1M-032R-243 Jamicon	40x40x10	Sleeve Bearing	12V DC	KF	9.76m3/h	5400 RPM	67mA	0.84W	24.6dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,5378000 PLN	500 100
JAM0790	KF0410 S1M-03R Fan 40x40x10; 12V sleeve 9.76m3/h
174		FD4010S12W7-71-2N Cooltron	40x40x10	Sleeve Bearing	12V DC	FD4010-71	11.20m3/h	6000 RPM	70mA	0.84W	25.5dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	0 pcs on stock by special order	8,4269000 PLN	500 0
CLT0024	Fan 40x40x10; 12V, sleeve, 11,20m3/h, two wires
175		KF0410S1H-01R Jamicon	40x40x10	Sleeve Bearing	12V DC	KF	10.19m3/h	6000 RPM	100mA	0.96W	28dBA	2 Lead Wires		plastic UL94V-0	plastic UL94V-0	-10°C	70°C	Inner Box	33 pcs on stock	8,1821000 PLN	5 1
JAM0788	DC Fan 40x40x10; 12V sleeve 10.19m3/h 2 wires

Herstellerkennzeichnung
Hersteller
Index Ropla

Package/Case

Bearing System

Rated Voltage

Series

Maximum Airflow

Speed

Rated Current

Power

Noise Level

Leads

Options

Frame

Impeller

Tₘᵢₙ

Tₘₐₓ

Packaging

Lagervorrat

Nettopreis

MOQ
Multiple

151

KF0420S2M-01R
Jamicon

40x40x20

Sleeve Bearing

24V DC

12.68m3/h

6200 RPM

70.8mA

1.2W

27.1dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

11,0585000 PLN

500
250

JAM0795

KF0420 S2M-01 Fan 40x40x20; 24V sleeve 12.68m3/h

/_certyfikaty/jamicon/jamicon_ul_fans.pdf

/_certyfikaty/jamicon/jamicon_ce_dcfans.pdf

152

JF0625H1M-01R
Jamicon

60x60x25

HTLS

12V DC

32.52m3/h

4000 RPM

200mA

2.4W

30.5dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,9771000 PLN

600
200

JAM0736

JF0625 H1M-01 Fan 60x60x25; 12V HTLS 32.52m3/h

153

FD6025S12W5-71-2N
Cooltron

60x60x25

Sleeve Bearing

12V DC

FD6025-71

36.34m3/h

4000 RPM

130mA

1.56W

28.9dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,6445000 PLN

600
0

CLT0081

DC Fan 60x60x25; 12V, sleeve 36.34m3/h, two wires

Show similar

JF0625S1HS00R
Jamicon

60x60x25

Sleeve Bearing

12V DC

36.40m3/h

4500 RPM

230mA

2.52W

34.1dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,6191000 PLN

600
200

JAM0741

JF0625 S1HS00R Fan 60x60x25; 12V sleeve 36.40m3/h

154

JF0825S2S-001-065R
Jamicon

80x80x25

Sleeve Bearing

24V DC

77.19m3/h

3500 RPM

170mA

3.84W

35.8dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

198 pcs
on stock

10,5067000 PLN

5
1

JAM0761

Fan 80x80x25; 24V sleeve 77.19m3/h, 2 pins

155

FD4010S12W5-71-2N
Cooltron

40x40x10

Sleeve Bearing

12V DC

FD4010-71

9.85m3/h

5400 RPM

60mA

0.72W

24.5dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,2010000 PLN

500
0

CLT0023

Fan 40x40x10; 12V, sleeve, 9,85m3/h, two wires

156

JF0625H1H-011R
Jamicon

60x60x25

HTLS

12V DC

36.85m3/h

4500 RPM

230mA

1.68W

33.4dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,1930000 PLN

600
200

JAM0735

JF0625 H1H-01R Fan 60x60x25; 12V HTLS 36.85m3/h

157

JF0825S2MS00R
Jamicon

80x80x25

Sleeve Bearing

24V DC

55.22m3/h

2500 RPM

130mA

2.4W

27.8dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,0826000 PLN

600
150

JAM0760

Fan 80x80x25; 24V sleeve 55.22m3/h, 3 pins

158

JF0925S1MS00R
Jamicon

92x92x25

Sleeve Bearing

12V DC

77.49m3/h

2500 RPM

200mA

2.04W

32.1dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,0826000 PLN

500
100

JAM0768

Fan 92x92x25; 12V sleeve 77.49m3/h, 3 pins

159

KF0510S1H-00R
Jamicon

50x50x10

Sleeve Bearing

12V DC

17.93m3/h

5300 RPM

158mA

1.56W

30.8dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,8388000 PLN

400
100

JAM0798

KF0510 S1H-00 Fan 50x50x10; 12V sleeve 17.93m3/h

160

JF0825S1H-001-065R
Jamicon

80x80x25

Sleeve Bearing

12V DC

65.78m3/h

3000 RPM

190mA

2.28W

31dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,5902000 PLN

600
150

JAM0755

JF0825 S1H-00R Fan 80x80x25; 12V sleeve 65.78m3/h

161

FD8025S12W7-71-2N
Cooltron

80x80x25

Sleeve Bearing

12V DC

FD8025-71

67.92m3/h

3000 RPM

170mA

2.04W

31.3dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,5801000 PLN

500
0

CLT0036

Fan 80x80x25; 12V, sleeve, 67,92m3/h, two wires

162

JF0925S2H-001-065R
Jamicon

92x92x25

Sleeve Bearing

24V DC

85.93m3/h

2800 RPM

190mA

3.5W

35.1dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

15 pcs
on stock

by special order
when stock is gone MOQ = 300 pcs
multiple = 100 pcs

9,5135000 PLN

5
1

JAM0769

Fan 92x92x25; 24V sleeve 85.93m3/h, 2 pins

163

JF0615S2M-00R
Jamicon

60x60x15

Sleeve Bearing

24V DC

23.06m3/h

4000 RPM

110mA

2.64W

28.8dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,4322000 PLN

600
300

JAM0731

JF0615 S2M-00 Fan 60x60x15; 24V sleeve 23.06m3/h

164

JF0925S1H-00
Jamicon

92x92x25

Sleeve Bearing

12V DC

88.36m3/h

2800 RPM

350mA

3.24W

35.1dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,3509000 PLN

500
100

JAM0859

Fan 92x92x25; 12V sleeve 88,36m3/h, 2 pins

165

JF0825S1HS00R
Jamicon

80x80x25

Sleeve Bearing

12V DC

65.78m3/h

3000 RPM

190mA

2.28W

31dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,2695000 PLN

600
150

JAM0757

JF0825 S1HS00 Fan 80x80x25; 12V sleeve 65.78m3/h

166

FD5015S12W7-61-2N
Cooltron

50x50x15

Sleeve Bearing

12V DC

FD5015-61

24.79m3/h

5500 RPM

160mA

1.92W

31dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,0478000 PLN

500
0

CLT0029

Fan 50x50x15; 12V, sleeve, 24,79m3/h, two wires

167

KF0620S1H-01R
Jamicon

60x60x20

Sleeve Bearing

12V DC

43.06m3/h

4500 RPM

267mA

3.0W

36.2dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,0257000 PLN

600
200

JAM0806

KF0620 S1H-01 Fan 60x60x20; 12V sleeve 43.06m3/h

168

JF0515S1M-00R
Jamicon

50x50x15

Dual Ball Bearing

12V DC

26.06m3/h

5000 RPM

220mA

2.52W

33dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

9,0169000 PLN

600
300

JAM0728

JF0515S1M-00 Fan 50x50x15; 12V sleeve 26.06m3/h

169

KF0410S1HS01R
Jamicon

40x40x10

Sleeve Bearing

12V DC

10.19m3/h

6000 RPM

100mA

0.96W

28dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,8630000 PLN

500
100

JAM0832

DC Fan 40x40x10; 12V sleeve 10.19m3/h

170

JF0625S1H-00R
Jamicon

60x60x25

Sleeve Bearing

12V DC

36.40m3/h

4500 RPM

230mA

2.52W

35.1dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,6191000 PLN

600
200

JAM0740

JF0625 S1H-00R Fan 60x60x25; 12V sleeve 36.40m3/h

171

JF0625S1HS00R
Jamicon

60x60x25

Sleeve Bearing

12V DC

36.40m3/h

4500 RPM

230mA

2.52W

34.1dBA

3 Lead Wires

Tachometer

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,6191000 PLN

600
200

JAM0741

JF0625 S1HS00R Fan 60x60x25; 12V sleeve 36.40m3/h

Show similar

FD6025S12W5-71-2N
Cooltron

60x60x25

Sleeve Bearing

12V DC

FD6025-71

36.34m3/h

4000 RPM

130mA

1.56W

28.9dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

10,6445000 PLN

600
0

CLT0081

DC Fan 60x60x25; 12V, sleeve 36.34m3/h, two wires

172

JF0625H2H-011-065R
Jamicon

60x60x25

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,5378000 PLN

600
200

JAM0737

JF0625 H2H-01 Fan 60x60x25; 24V HTLS 36.61m3/h

Ware entspricht nicht der RoHS-Richtlinie

173

KF0410S1M-032R-243
Jamicon

40x40x10

Sleeve Bearing

12V DC

9.76m3/h

5400 RPM

67mA

0.84W

24.6dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,5378000 PLN

500
100

JAM0790

KF0410 S1M-03R Fan 40x40x10; 12V sleeve 9.76m3/h

174

FD4010S12W7-71-2N
Cooltron

40x40x10

Sleeve Bearing

12V DC

FD4010-71

11.20m3/h

6000 RPM

70mA

0.84W

25.5dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

0 pcs
on stock

by special order

8,4269000 PLN

500
0

CLT0024

Fan 40x40x10; 12V, sleeve, 11,20m3/h, two wires

175

KF0410S1H-01R
Jamicon

40x40x10

Sleeve Bearing

12V DC

10.19m3/h

6000 RPM

100mA

0.96W

28dBA

2 Lead Wires

plastic UL94V-0

-10°C

70°C

Inner Box

33 pcs
on stock

8,1821000 PLN

5
1

JAM0788

DC Fan 40x40x10; 12V sleeve 10.19m3/h 2 wires

Ropla Elektronik sp. z o.o., ul. Wrocławska 1C, 52-200 Suchy Dwór, Poland, NIP: 899-00-22-570, Regon 930272589
District Court Wrocław-Fabryczna, Business Register KRS 0000060925, Initial capital: 676 500,00 PLN.

Projekt compunet Polska, realisierung WRO-COM