# Rectifier diode DO203AB 400V 40A

**URL:** https://aio.lv/en/product--rectifier-diode-do203ab-400v-40a--10554484
**Data updated:** 2026-02-12 21:59 (EET)
**Category:** Other Repair Parts
**Manufacturer code:** EB1736339894#
**EAN:** 3100001402265
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.02 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 8.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rectifier-diode-do203ab-400v-40a--10554484

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Single rectifier diode DO203AB rated for 400V reverse voltage and 40A forward current. Designed for power rectification in electronic circuits, power supplies, and industrial equipment. Through-hole package suitable for PCB mounting or chassis installation. Provides reliable current conduction and protection in DC power conversion and rectifier stages.

## Long description

Single rectifier diode DO203AB rated for 400V reverse voltage and 40A forward current. Designed for power rectification in electronic circuits, power supplies, and industrial equipment, this through-hole diode provides reliable conduction and stable performance in DC power conversion and rectifier stages. The DO203AB package allows secure PCB mounting or chassis installation where robust current handling and thermal dissipation are required.
Advantages
The diode combines a high maximum repetitive reverse voltage with a high average forward current rating to support demanding power applications. A through-hole package simplifies soldering and mechanical fixation on printed circuit boards or panel mounts. Thermal and electrical characteristics are suitable for continuous operation under rated conditions, offering dependable rectification with low maintenance requirements.
Suitable for
Power supply rectification in industrial and consumer electronics
DC power conversion and battery charging circuits
Bridge rectifier assemblies and single-diode rectifier stages
Chassis-mounted or PCB-mounted power modules
Key specifications
Maximum repetitive reverse voltage: 400 V
Average forward current: 40 A
Package type: through-hole DO203AB-style
Typical application: power rectification and DC conversion
Mounting: PCB soldering or chassis fixation
How to use
Install the rectifier diode on the PCB or chassis following the circuit schematic orientation, observing correct polarity for anode and cathode. Provide adequate copper area or heatsinking to dissipate power losses when operating near the maximum forward current. Ensure solder joints are solid and that the mounting method secures the component against vibration and mechanical stress. Verify that the working voltage in the circuit does not exceed the diode's maximum reverse voltage rating.
Usage recommendations
For reliable long-term operation, operate the diode within specified limits and allow sufficient cooling. When used in bridge configurations, consider current sharing, ambient temperature, and derating to extend component life. Follow standard safety practices for handling power semiconductors and avoid exceeding the maximum reverse voltage or forward current values.

## FAQ

### How much does the Rectifier diode DO203AB 400V 40A cost, and is it available for purchase?

The price is 10.02 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10554484/52717779_large.webp