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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £5.49 | 1 to 2 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
Product Number: 12859N
The WAI 12859N is a brand-new 24V, 150A alternator. It is built to replace Denso original-equipment units, including references 021080-0680, 101210-9000, 101210-9001, 101210-9002, 211-8009 and DAN2001, as well as Caterpillar references 249-0313 and 2490313 — eight OE cross-references in total. Designed as a direct OE-specification replacement, it is suited to heavy-duty plant and agricultural applications where Denso IR/IF (internal regulator, internal fan) architecture is specified.
The IR/IF design integrates the voltage regulator within the alternator body, eliminating the need for an external regulator and simplifying installation. Clockwise rotation (viewed from the drive end) matches the original Denso configuration, and the unit is supplied without a pulley so the original pulley can be transferred directly from the outgoing alternator — preserving the correct belt alignment and drive ratio for the application.
At 150 amperes output on a 24-volt system, this alternator is rated for the high electrical loads typical of Caterpillar plant machinery and equivalent Denso-equipped equipment. As a brand-new unit rather than a remanufactured exchange, no core return is required.
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| Type | Alternator |
|---|---|
| Manufacturer | Denso |
| Design | IR/IF |
| Voltage | 24V |
| Output | 150A |
| Rotation | CW |
| Pulley | Without Pulley |
| Condition | Brand New |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
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Standard Delivery: £5.49
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 13919N | 22925N | 23328N | 13592N | 13919 | 21881N | 23298N | 23820N | A6018 | A6025 | A6052 | A6061 | A6063 | A6077 | A6079 |
| Voltage | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | |
| Output Current | 140 | 60 | 125 | 50 | 130 | 120 | 150 | 80 | 100 | 100 | 130 | 120 | 105 | ||
| Design | IR/IF | IR/IF | ER/IF | IR/IF | IR/IF | IR/IF | |||||||||
| Manufacturer | Denso | Denso | Denso | Denso | Denso | Denso | Denso | ||||||||
| Pulley | S6 | S6 | V1 | SC5 | SC6 | AFP | AFP | AFP | AFP | AFP | AP | AFP | |||
| Rotation | CW | CW | CW | CW | CW | ||||||||||
A. The WAI 12859N carries eight OE cross-references in total. On the Denso side these are 021080-0680, 101210-9000, 101210-9001, 101210-9002, 211-8009 and DAN2001. On the Caterpillar side they are 249-0313 and 2490313. If you need to confirm fit by OEM number or machine model, search our cross-referenced catalogue or ask Simon — every fitment shown is backed by our Fit Guarantee.
A. The 12859N outputs 150 amperes on a 24-volt system, which is rated for the sustained high electrical loads of heavy-duty plant and agricultural machinery. Rotation is clockwise (viewed from the drive end) and the design is Denso IR/IF — meaning the voltage regulator is built into the alternator body rather than mounted externally.
A. No — the WAI 12859N is supplied without a pulley. You transfer the original pulley from the outgoing alternator directly onto this unit, which preserves the correct belt alignment and drive ratio without the need for additional parts.
A. It is brand new. No core return or exchange deposit applies — the unit is supplied new in full production specification.
A. Yes. Every vehicle and OE cross-reference shown for this part is checked against manufacturer data and backed by our Fit Guarantee. If it is not right, our Fit Guarantee or hassle-free returns have you covered.
A. Use the selection widget to match your make, model and engine, or search our cross-referenced catalogue by OEM number, machine model or equivalent part across brands. If your vehicle is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.
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