Schurter ALO
Schurter ALO
Schurter ALO

Schurter ALO EV High Voltage DC Fuse

250/500/750/1000VDC | 100–900A | Bolt-on Mounting

Schurter ALO EV Fuse Overview

The Schurter ALO is a high voltage DC fuse designed for electric vehicle power distribution and battery protection applications requiring high current capacity. Rated up to 1000VDC with a breaking capacity of up to 50kA, it is available in current ratings from 100A to 900A – significantly higher than the AMO and ADO series – making it suited to high power EV systems including power distribution units, battery disconnect units and all-in-one controllers.

The ALO is available in both ceramic and resin tube variants across a range of bolt-on mounting configurations and dimension codes, providing flexibility for different installation geometries and enclosure designs.

Product features

Available in ceramic and resin tube construction

Multiple bolt-on configurations: Bolt-on A, B, C and D depending on sub-series

Copper alloy tin-plated terminals throughout

Vibration tested to IEC 60068-2-6; shock tested to MIL-STD-202 Method 213 Condition C

Designed to UL 248-20, ISO 8820-8, GB/T31465.6 and JASO D622

UL approved (File No. 548130)

RoHS, REACH and China RoHS compliant

Compatible Applications

The ALO series is designed for high current DC protection in electric vehicle power systems:

PDU: power distribution unit

BDU: battery disconnect unit

All-in-one controller

2-in-1 electric drive

Battery management system

ALO Technical Specifications

Technical specifications
Technical specifications
Parameter Value
Rated voltage 250 / 500 / 750 / 1000VDC
Rated current 100–900A
Breaking capacity Up to 50kA
Characteristic EV Fuse
Mounting Bolt-on
Operating temperature -40°C to +125°C
Storage conditions -40°C to +70°C, max. 70% r.h.
Terminal material Copper alloy, tin-plated
Tube material Ceramic / Resin
Endcap material Copper alloy
Approvals UL (File No. 548130)
Compliances RoHS, REACH, China RoHS
Product standards UL 248-20, ISO 8820-8
Product standards (cont.) GB/T31465.6, JASO D622

ALO Variants & Order Codes

Series

Current (A)

Voltage (VDC)

Dim. Code

Mounting

Tube

Breaking Capacity

Pre-arcing I²t typ. (kA²s)

Melting I²t typ. (kA²s)

Power Dissipation typ. (W)

Pkg

Order No.

ALO11

100

500

3148

Bolt-on A

Ceramic

20kA1

1.05

4.4

11

6

3-156-224

ALO11

125

500

3148

Bolt-on A

Ceramic

20kA1

1.75

7.3

13

6

3-156-225

ALO11

150

500

3148

Bolt-on A

Ceramic

20kA1

2.6

10.9

17

6

3-156-226

ALO11

200

500

3148

Bolt-on A

Ceramic

20kA1

4.85

20.4

24

6

3-156-227

ALO11

250

500

3148

Bolt-on A

Ceramic

20kA1

8.61

36.2

28

6

3-156-228

ALO11

300

500

3148

Bolt-on A

Ceramic

20kA1

12.4

52.1

35

6

3-156-229

ALO11

350

500

3148

Bolt-on A

Ceramic

20kA1

17.85

74.9

45

6

3-156-230

ALO12

100

500

3148

Bolt-on B

Ceramic

20kA1

1.05

4.4

11

6

3-156-231

ALO12

125

500

3148

Bolt-on B

Ceramic

20kA1

1.75

7.3

13

6

3-156-232

ALO12

150

500

3148

Bolt-on B

Ceramic

20kA1

2.6

10.9

17

6

3-156-233

ALO12

200

500

3148

Bolt-on B

Ceramic

20kA1

4.85

20.4

24

6

3-156-234

ALO12

250

500

3148

Bolt-on B

Ceramic

20kA1

8.61

36.2

28

6

3-156-235

ALO12

300

500

3148

Bolt-on B

Ceramic

20kA1

12.4

52.1

35

6

3-156-236

ALO12

350

500

3148

Bolt-on B

Ceramic

20kA1

17.85

74.9

45

6

3-156-237

ALO13

160

250

3734

Bolt-on A

Ceramic

20kA1

1.598

8.537

13

4

3-156-238

ALO13

200

250

3734

Bolt-on A

Ceramic

20kA1

4.516

15.806

16

4

3-156-239

ALO13

250

250

3734

Bolt-on A

Ceramic

20kA1

7.243

25.351

20

4

3-156-240

ALO13

300

250

3734

Bolt-on A

Ceramic

20kA1

13.38

46.83

23

4

3-156-241

ALO13

315

250

3734

Bolt-on A

Ceramic

20kA1

15.89

55.615

24

4

3-156-242

ALO13

350

250

3734

Bolt-on A

Ceramic

20kA1

19.81

69.335

26

4

3-156-243

ALO13

400

250

3734

Bolt-on A

Ceramic

20kA1

27.69

96.915

31

4

3-156-244

ALO13

450

250

3734

Bolt-on A

Ceramic

20kA1

37.09

129.815

35

4

3-156-245

ALO13

500

250

3734

Bolt-on A

Ceramic

20kA1

48.1

168.35

38

4

3-156-246

ALO13

600

250

3734

Bolt-on A

Ceramic

20kA1

79.28

277.48

44

4

3-156-247

ALO14

200

500

3852

Bolt-on A

Ceramic

20kA1

3.92

16.5

36

3

3-156-248

ALO14

250

500

3852

Bolt-on A

Ceramic

20kA1

6.97

29.3

39

3

3-156-249

ALO14

300

500

3852

Bolt-on A

Ceramic

20kA1

10.9

45.8

48

3

3-156-250

ALO14

350

500

3852

Bolt-on A

Ceramic

20kA1

15.7

65.9

58

3

3-156-251

ALO14

400

500

3852

Bolt-on A

Ceramic

20kA1

22.59

94.9

68

3

3-156-252

ALO14

450

500

3852

Bolt-on A

Ceramic

20kA1

27.88

117.2

76

3

3-156-253

ALO14

500

500

3852

Bolt-on A

Ceramic

20kA1

52.07

154.9

82

3

3-156-254

ALO16

125

500

3852

Bolt-on B

Ceramic

20kA1

1

4.43

16

3

3-156-263

ALO16

150

500

3852

Bolt-on B

Ceramic

20kA1

1.525

7.32

20

3

3-156-264

ALO16

200

500

3852

Bolt-on B

Ceramic

20kA1

3.02

16.5

36

3

3-156-265

ALO16

250

500

3852

Bolt-on B

Ceramic

20kA1

6.07

29.3

39

3

3-156-266

ALO16

300

500

3852

Bolt-on B

Ceramic

20kA1

10.9

45.8

48

3

3-156-267

ALO16

350

500

3852

Bolt-on B

Ceramic

20kA1

15.7

65.9

58

3

3-156-268

ALO16

400

500

3852

Bolt-on B

Ceramic

20kA1

22.59

94.9

68

3

3-156-269

ALO16

450

500

3852

Bolt-on B

Ceramic

20kA1

27.88

117.2

76

3

3-156-270

ALO16

500

500

3852

Bolt-on B

Ceramic

20kA1

36.88

154.9

82

3

3-156-271

ALO19

250

1000

5074

Bolt-on A

Ceramic

30kA3

11.501

39.94

43

3

3-156-285

ALO19

300

1000

5074

Bolt-on A

Ceramic

30kA3

15.363

53.15

54

3

3-156-286

ALO19

350

1000

5074

Bolt-on A

Ceramic

30kA3

25.005

85.88

67

3

3-156-287

ALO19

400

1000

5074

Bolt-on A

Ceramic

30kA3

37.358

127.4

79

3

3-156-288

ALO19

450

1000

5074

Bolt-on A

Ceramic

30kA3

52.598

178.17

95

3

3-156-289

ALO19

500

1000

5074

Bolt-on A

Ceramic

30kA3

70.897

238.55

108

3

3-156-290

ALO51

100

500

3153

Bolt-on A

Resin

20kA1

3.1

9.3

16

70

3-156-291

ALO51

125

500

3153

Bolt-on A

Resin

20kA1

4.5

14.4

18

70

3-156-292

ALO51

150

500

3153

Bolt-on A

Resin

20kA1

6.3

20.6

22

70

3-156-293

ALO51

200

500

3153

Bolt-on A

Resin

20kA1

11.1

35.2

25

70

3-156-294

ALO51

250

500

3153

Bolt-on A

Resin

20kA1

17.2

57.3

30

70

3-156-295

ALO51

300

500

3153

Bolt-on A

Resin

20kA1

24.2

81.1

44

70

3-156-296

ALO51

350

500

3153

Bolt-on A

Resin

20kA1

32.5

106.4

52

70

3-156-297

ALO51

400

500

3153

Bolt-on A

Resin

20kA1

42.3

140.2

68

70

3-156-298

ALO52

100

500

3153

Bolt-on B

Resin

20kA1

3.1

9.3

16

70

3-156-301

ALO52

125

500

3153

Bolt-on B

Resin

20kA1

4.5

14.4

18

70

3-156-302

ALO52

150

500

3153

Bolt-on B

Resin

20kA1

6.3

20.6

22

70

3-156-303

ALO52

200

500

3153

Bolt-on B

Resin

20kA1

11.1

35.2

25

70

3-156-304

ALO52

250

500

3153

Bolt-on B

Resin

20kA1

17.2

57.3

30

70

3-156-305

ALO52

300

500

3153

Bolt-on B

Resin

20kA1

24.2

81.1

44

70

3-156-306

ALO52

350

500

3153

Bolt-on B

Resin

20kA1

32.5

106.4

52

70

3-156-307

ALO52

400

500

3153

Bolt-on B

Resin

20kA1

42.3

140.2

68

70

3-156-308

ALO53

200

500

3853

Bolt-on A

Resin

20kA1

11.8

35.5

36

3

3-156-311

ALO53

250

500

3853

Bolt-on A

Resin

20kA1

18.4

55.6

39

3

3-156-312

ALO53

300

500

3853

Bolt-on A

Resin

20kA1

26.5

79.3

48

3

3-156-313

ALO53

350

500

3853

Bolt-on A

Resin

20kA1

36.1

108.1

58

3

3-156-314

ALO53

400

500

3853

Bolt-on A

Resin

20kA1

47.1

141.4

63

3

3-156-315

ALO53

450

500

3853

Bolt-on A

Resin

20kA1

59.6

158.9

68

3

3-156-316

ALO53

500

500

3853

Bolt-on A

Resin

20kA1

73.6

178.7

73

3

3-156-317

ALO53

550

500

3853

Bolt-on A

Resin

20kA1

89.1

208.6

87

3

3-156-318

ALO53

630

500

3853

Bolt-on A

Resin

20kA1

116.9

233.3

105

3

3-156-319

ALO53

700

500

3853

Bolt-on A

Resin

20kA1

144.3

253.4

118

3

3-156-320

ALO54

200

500

3853

Bolt-on B

Resin

20kA1

11.8

35.5

36

3

3-156-329

ALO54

225

500

3853

Bolt-on B

Resin

20kA1

14.9

44.7

37

3

3-156-330

ALO54

250

500

3853

Bolt-on B

Resin

20kA1

18.4

55.6

39

3

3-156-331

ALO54

300

500

3853

Bolt-on B

Resin

20kA1

26.5

79.3

48

3

3-156-332

ALO54

350

500

3853

Bolt-on B

Resin

20kA1

36.1

108.1

58

3

3-156-333

ALO54

400

500

3853

Bolt-on B

Resin

20kA1

47.1

141.4

63

3

3-156-334

ALO54

450

500

3853

Bolt-on B

Resin

20kA1

59.6

158.9

68

3

3-156-335

ALO54

500

500

3853

Bolt-on B

Resin

20kA1

73.6

178.7

73

3

3-156-336

ALO54

550

500

3853

Bolt-on B

Resin

20kA1

89.1

208.6

87

3

3-156-337

ALO54

600

500

3853

Bolt-on B

Resin

20kA1

105.5

213

99

3

3-156-338

ALO54

630

500

3853

Bolt-on B

Resin

20kA1

116.9

233.3

105

3

3-156-339

ALO54

700

500

3853

Bolt-on B

Resin

20kA1

144.3

253.4

118

3

3-156-340

ALO55

200

500

3853

Bolt-on C

Resin

20kA1

11.8

35.5

36

3

3-156-350

ALO55

225

500

3853

Bolt-on C

Resin

20kA1

14.9

44.7

37

3

3-156-351

ALO55

250

500

3853

Bolt-on C

Resin

20kA1

18.4

55.6

39

3

3-156-352

ALO55

300

500

3853

Bolt-on C

Resin

20kA1

26.5

79.3

48

3

3-156-353

ALO55

350

500

3853

Bolt-on C

Resin

20kA1

36.1

108.1

58

3

3-156-354

ALO55

400

500

3853

Bolt-on C

Resin

20kA1

47.1

141.4

63

3

3-156-355

ALO55

450

500

3853

Bolt-on C

Resin

20kA1

59.6

158.9

68

3

3-156-356

ALO55

500

500

3853

Bolt-on C

Resin

20kA1

73.6

178.7

73

3

3-156-357

ALO55

550

500

3853

Bolt-on C

Resin

20kA1

89.1

208.6

87

3

3-156-358

ALO55

600

500

3853

Bolt-on C

Resin

20kA1

105.5

213

99

3

3-156-359

ALO55

630

500

3853

Bolt-on C

Resin

20kA1

116.9

233.3

105

3

3-156-360

ALO55

700

500

3853

Bolt-on C

Resin

20kA1

144.3

253.4

118

3

3-156-361

ALO56

200

500

3853

Bolt-on D

Resin

20kA1

11.8

35.5

36

3

3-156-371

ALO56

225

500

3853

Bolt-on D

Resin

20kA1

14.9

44.7

37

3

3-156-372

ALO56

250

500

3853

Bolt-on D

Resin

20kA1

18.4

55.6

39

3

3-156-373

ALO56

300

500

3853

Bolt-on D

Resin

20kA1

26.5

79.3

48

3

3-156-374

ALO56

350

500

3853

Bolt-on D

Resin

20kA1

36.1

108.1

58

3

3-156-375

ALO56

400

500

3853

Bolt-on D

Resin

20kA1

47.1

141.4

63

3

3-156-376

ALO56

450

500

3853

Bolt-on D

Resin

20kA1

59.6

158.9

68

3

3-156-377

ALO56

500

500

3853

Bolt-on D

Resin

20kA1

73.6

178.7

73

3

3-156-378

ALO56

550

500

3853

Bolt-on D

Resin

20kA1

89.1

208.6

87

3

3-156-379

ALO56

600

500

3853

Bolt-on D

Resin

20kA1

105.5

213

99

3

3-156-380

ALO56

630

500

3853

Bolt-on D

Resin

20kA1

116.9

233.3

105

3

3-156-381

ALO56

700

500

3853

Bolt-on D

Resin

20kA1

144.3

253.4

118

3

3-156-382

ALO58

250

750

5072

Bolt-on A

Resin

50kA4

17.68

61.88

31

1

3-156-388

ALO58

275

750

5072

Bolt-on A

Resin

50kA4

19.86

69.51

33

1

3-156-389

ALO58

300

750

5072

Bolt-on A

Resin

50kA4

29.1

101.85

37

1

3-156-390

ALO58

315

750

5072

Bolt-on A

Resin

50kA4

30.1

115.35

38

1

3-156-391

ALO58

350

750

5072

Bolt-on A

Resin

50kA4

43.89

153.615

44

1

3-156-392

ALO58

400

750

5072

Bolt-on A

Resin

50kA4

62.32

218.12

50

1

3-156-393

ALO58

450

750

5072

Bolt-on A

Resin

50kA4

72.98

255.43

62

1

3-156-394

ALO58

500

750

5072

Bolt-on A

Resin

50kA4

97.35

340.725

68

1

3-156-395

ALO58

550

750

5072

Bolt-on A

Resin

50kA4

121.35

424.75

70

1

3-156-396

ALO58

600

750

5072

Bolt-on A

Resin

50kA4

167.8

587.3

78

1

3-156-397

ALO58

630

750

5072

Bolt-on A

Resin

50kA4

177.6

621.6

79

1

3-156-398

ALO58

700

750

5072

Bolt-on A

Resin

50kA4

240.2

840.7

91

1

3-156-399

ALO58

750

750

5072

Bolt-on A

Resin

50kA4

280.8

982.8

94

1

3-156-400

ALO58

800

750

5072

Bolt-on A

Resin

50kA4

371.8

1301.3

99

1

3-156-401

ALO58

850

750

5072

Bolt-on A

Resin

50kA4

401.7

1405.95

106

1

3-156-402

ALO58

900

750

5072

Bolt-on A

Resin

50kA4

541

1893.5

108

1

3-156-403

ALO59

250

1000

5072

Bolt-on A

Resin

50kA4

24.9

77.7

27

1

3-156-404

ALO59

300

1000

5072

Bolt-on A

Resin

50kA4

27

84.3

32

1

3-156-405

ALO59

325

1000

5072

Bolt-on A

Resin

50kA4

29.7

92.7

35

1

3-156-406

ALO59

350

1000

5072

Bolt-on A

Resin

50kA4

42.9

134

38

1

3-156-407

ALO59

400

1000

5072

Bolt-on A

Resin

50kA4

66.3

207

43

1

3-156-408

ALO59

450

1000

5072

Bolt-on A

Resin

50kA4

70.6

220.7

48

1

3-156-409

ALO59

500

1000

5072

Bolt-on A

Resin

50kA4

96.7

302.1

54

1

3-156-410

ALO59

550

1000

5072

Bolt-on A

Resin

50kA4

112.4

351.3

59

1

3-156-411

ALO59

600

1000

5072

Bolt-on A

Resin

50kA4

123.2

385

64

1

3-156-412

ALO59

650

1000

5072

Bolt-on A

Resin

50kA4

133.9

418.5

70

1

3-156-413

ALO59

700

1000

5072

Bolt-on A

Resin

50kA4

144.3

451

75

1

3-156-414

ALO59

800

1000

5072

Bolt-on A

Resin

50kA4

219.7

686.6

85

1

3-156-415

ALO59

900

1000

5072

Bolt-on A

Resin

50kA4

281.6

880.1

96

1

3-156-416

1 20kA, L/R 2ms

2 25kA, L/R 2ms

3 30kA, L/R 5ms

4 50kA, L/R 10ms

Downloads & Documentation

ALO Datasheet

Buy Schurter ALO From the Official UK Distributor

Dalroad is the official UK distributor for Schurter. We have reliable stock of all their high voltage fuses, while our team supports design engineers through component selection, system integration and supply planning for safety-critical EV applications. Submit an enquiry to book a call with our technical experts or request a sample.