Description

Hitachi 139114 Rectifier Scania 2 Series & Mercedes-Benz T2 – OE Bosch Replacement at the Right Price

Your Scania 2 series or Mercedes-Benz T2 alternator has a charging fault. The battery drains faster than it should. The charge warning light stays on even after a full run. So, before you replace the whole alternator, check the rectifier — it is the most common cause of charging failure on Bosch-type alternators across both platforms. The Hitachi 139114 rectifier Scania 2 series and Mercedes-Benz T2 is a brand-new OE Bosch-type replacement diode pack — 114mm diameter, 50A rated — manufactured by Hitachi to the same specification as the original Bosch unit. Therefore, at just £29.49, you restore full charging output to both vehicle platforms without the cost of a complete alternator.

Why Hitachi Manufactures This Rectifier to OE Bosch Specification

The manufacturer restriction on this part reads OE Bosch. However, the unit is manufactured by Hitachi — one of the world’s leading alternator component suppliers alongside Bosch itself. So, this is not a budget alternative or a pattern copy. It is a precision diode assembly built to match the exact Bosch alternator specification fitted to the Scania 2 series and Mercedes-Benz T2 from the factory.

Hitachi supplies OE electrical components to major vehicle manufacturers globally. Therefore, the 139114 carries the same diode rating, housing diameter, and terminal configuration as the original Bosch unit — without the OE price premium. As a result, you get factory-specification rectifier performance at an independent workshop price point.

Confirmed Specification  Hitachi 139114 rectifier Scania 2 series Mercedes T2 — Know Before You Order

Two physical measurements confirm fitment before you touch a single bolt. So, check both against your existing rectifier before ordering.

Diameter: 114mm — the rectifier housing must measure 114mm across. This 114mm OD specification places this rectifier in the Bosch 488 and 489 series alternator family. Partsnmore However, other Bosch-type alternators use 120mm, 126mm, or 130mm housings — and those are not interchangeable. Therefore, always measure your existing unit before ordering.

Current rating: 50A — this rectifier is rated to 50 amps per diode. As a result, you maintain correct diode thermal headroom under the sustained electrical loads both the Scania 2 series and Mercedes-Benz T2 place on their charging systems.

Hitachi 139114 Rectifier Scania 2 Series Mercedes T2 — Full Part Specification

For full fitment confirmation across all Scania 2 series and Mercedes-Benz T2 alternator unit numbers, check the Hitachi automotive parts reference database before ordering.

What Causes This Rectifier to Fail — And Why You Catch It Early

Rectifier diodes do not fail randomly. They fail for specific, predictable reasons. So, understanding the cause stops the same fault from repeating after your repair.

. NAPA Auto Parts A partially discharged battery draws maximum current from the alternator at every start. Therefore, the rectifier diodes operate at their thermal limit continuously — and over time that repeated thermal stress causes diode breakdown.

Furthermore, reverse voltage spikes from jump-starting with incorrect polarity, disconnecting the battery while the engine runs, or fitting the wrong battery type all cause immediate diode damage. As a result, on older commercial platforms like the Scania 2 series and Mercedes-Benz T2, a history of jump-starting or battery changes makes rectifier failure almost inevitable without regular inspection.

So, before fitting the Hitachi 139114, always verify the battery condition and charging system voltage. Fitting a new rectifier into an alternator still connected to a weak battery simply repeats the fault.

Why This Repair Makes Financial Sense on Both Platforms

A replacement alternator for a Scania 2 series or Mercedes-Benz T2 costs significantly more than £29.49. However, when the rectifier is the only failed component, replacing the complete unit wastes money and time your operation cannot afford.

The Hitachi 139114 gives you a direct OE Bosch-type diode pack at a fraction of the cost of a full alternator replacement. Therefore, for workshops servicing both Scania 2 series and Mercedes-Benz T2 vehicles, stocking this single part number covers rectifier failures across two commercial platforms simultaneously. As a result, your response time when a vehicle goes down with a charging fault stays fast and your parts cost stays controlled.

Order Today — £29.49, In Stock, Ready to Dispatch

The Hitachi 139114 rectifier Scania 2 series and Mercedes-Benz T2 is in stock now at just £29.49 — brand new, OE Bosch-type specification, 114mm, 50A rated, and ready to dispatch today. So, stop the charging fault, protect your battery, and get both platforms back on the road. Check out BOSCH 1 125 045 107 Stator, alternator

Add to cart now and restore your alternator to full factory output today.