19 ATBrushless alternator · Bosch T1 mount
Only if you have one. Otherwise choose below.
Find your 19 AT
1.Voltage. Choose your system.
2.Output. Choose the current.
3.Filter. Do you need noise suppression?
4.Air intake. Ducted or ductless?
5.Mounting. Left-hand or right-hand?
6.Your part number. Everything in one line.
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WarrantyTechnical parameters
- System voltage
- V
- Rated output
- A
- Output at 2 000 rpm
- A
- Max power
- kW
- Max efficiency
- %
- Weight
- kg
- Max speed
- 8 000rpm
- Temperature limit
- °C
Options
- Noise-suppression filter
- Air intake
- Fan
- bidirectional
- Isolated ground
- (standard)
All 48 part numbers
| Part number | System | Output | Filter | Air intake | Mounting | Warranty |
|---|---|---|---|---|---|---|
| 121521-150 | 12 V | 350 A | no | Ductless | left-hand | 2.5 years |
| 121621-150 | 12 V | 350 A | no | Ductless | right-hand | 2.5 years |
| 121521-152 | 12 V | 350 A | yes | Ductless | left-hand | 2.5 years |
| 121621-152 | 12 V | 350 A | yes | Ductless | right-hand | 2.5 years |
| 121524-154 | 12 V | 350 A | no | Duct 2.75" | left-hand | 2.5 years |
| 121624-154 | 12 V | 350 A | no | Duct 2.75" | right-hand | 2.5 years |
| 121524-156 | 12 V | 350 A | yes | Duct 2.75" | left-hand | 2.5 years |
| 121624-156 | 12 V | 350 A | yes | Duct 2.75" | right-hand | 2.5 years |
| 121521-151 | 12 V | 450 A | no | Ductless | left-hand | 2 years |
| 121621-151 | 12 V | 450 A | no | Ductless | right-hand | 2 years |
| 121521-153 | 12 V | 450 A | yes | Ductless | left-hand | 2 years |
| 121621-153 | 12 V | 450 A | yes | Ductless | right-hand | 2 years |
| 121524-155 | 12 V | 450 A | no | Duct 2.75" | left-hand | 2 years |
| 121624-155 | 12 V | 450 A | no | Duct 2.75" | right-hand | 2 years |
| 121524-157 | 12 V | 450 A | yes | Duct 2.75" | left-hand | 2 years |
| 121624-157 | 12 V | 450 A | yes | Duct 2.75" | right-hand | 2 years |
| 221521-250 | 24 V | 350 A | no | Ductless | left-hand | 2.5 years |
| 221621-250 | 24 V | 350 A | no | Ductless | right-hand | 2.5 years |
| 221521-252 | 24 V | 350 A | yes | Ductless | left-hand | 2.5 years |
| 221621-252 | 24 V | 350 A | yes | Ductless | right-hand | 2.5 years |
| 221524-254 | 24 V | 350 A | no | Duct 2.75" | left-hand | 2.5 years |
| 221624-254 | 24 V | 350 A | no | Duct 2.75" | right-hand | 2.5 years |
| 221524-256 | 24 V | 350 A | yes | Duct 2.75" | left-hand | 2.5 years |
| 221624-256 | 24 V | 350 A | yes | Duct 2.75" | right-hand | 2.5 years |
| 221521-251 | 24 V | 450 A | no | Ductless | left-hand | 2 years |
| 221621-251 | 24 V | 450 A | no | Ductless | right-hand | 2 years |
| 221521-253 | 24 V | 450 A | yes | Ductless | left-hand | 2 years |
| 221621-253 | 24 V | 450 A | yes | Ductless | right-hand | 2 years |
| 221524-255 | 24 V | 450 A | no | Duct 2.75" | left-hand | 2 years |
| 221624-255 | 24 V | 450 A | no | Duct 2.75" | right-hand | 2 years |
| 221524-257 | 24 V | 450 A | yes | Duct 2.75" | left-hand | 2 years |
| 221624-257 | 24 V | 450 A | yes | Duct 2.75" | right-hand | 2 years |
| 521521-550 | 48 V | 200 A | no | Ductless | left-hand | 2.5 years |
| 521621-550 | 48 V | 200 A | no | Ductless | right-hand | 2.5 years |
| 521521-552 | 48 V | 200 A | yes | Ductless | left-hand | 2.5 years |
| 521621-552 | 48 V | 200 A | yes | Ductless | right-hand | 2.5 years |
| 521524-554 | 48 V | 200 A | no | Duct 2.75" | left-hand | 2.5 years |
| 521624-554 | 48 V | 200 A | no | Duct 2.75" | right-hand | 2.5 years |
| 521524-556 | 48 V | 200 A | yes | Duct 2.75" | left-hand | 2.5 years |
| 521624-556 | 48 V | 200 A | yes | Duct 2.75" | right-hand | 2.5 years |
| 521521-551 | 48 V | 250 A | no | Ductless | left-hand | 2 years |
| 521621-551 | 48 V | 250 A | no | Ductless | right-hand | 2 years |
| 521521-553 | 48 V | 250 A | yes | Ductless | left-hand | 2 years |
| 521621-553 | 48 V | 250 A | yes | Ductless | right-hand | 2 years |
| 521524-555 | 48 V | 250 A | no | Duct 2.75" | left-hand | 2 years |
| 521624-555 | 48 V | 250 A | no | Duct 2.75" | right-hand | 2 years |
| 521524-557 | 48 V | 250 A | yes | Duct 2.75" | left-hand | 2 years |
| 521624-557 | 48 V | 250 A | yes | Duct 2.75" | right-hand | 2 years |
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What is inside
Built the ALMOTT way
Brushless, hairpin statorNo brushes to wear; rectangular copper conductors fill the slot for high output at low speed.
High output at idleUp to 12 V 210 A · 24 V 200 A · 48 V 125 A at 2 000 alternator rpm.
High-temperature bearingsRated for the engine bay: 110 °C on 12 V; 125 °C on 24, 48 V.
Isolated groundIsolated-ground terminal on every version; the fan cools in both directions of rotation.
IP23, air-cooledProtected against spray; ductless or duct 2.75".
48 V for lithium banksThe 48 V versions charge LiFePO4 banks directly, 200 or 250 A.
Not sure?
We choose the number for you
Tell us the vehicle, the system voltage, the loads and the battery, and we pick the right version.
- Vehicle and engine: make, model, alternator speed at idle
- System voltage: 12, 24, 48 V
- Loads: what runs at idle and at speed
- Battery: lead-acid or lithium, capacity
