# Power Supply Dell 240W SFF EPA HF (Model HNJC4-RFB) — 240W small form factor internal PSU

**URL:** https://aio.lv/en/product--dell-hnjc4-rfb--11090774
**Data updated:** 2026-01-12 19:33 (EET)
**Category:** Computer Component Accessories
**Manufacturer:** Dell
**Manufacturer code:** HNJC4-RFB
**EAN:** 5715063002940
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 101.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 84.29 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dell-hnjc4-rfb--11090774

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Dell 240W SFF EPA HF power supply (model HNJC4-RFB) is a small form factor internal PSU delivering up to 240 watts for compatible Dell systems. Designed for compact desktops and workstations, it provides standard DC outputs, EPA high-efficiency operation and HF filtering for reduced interference. Use for replacing or upgrading existing SFF units to restore reliable power and ensure system stability.

## Long description

Dell 240W SFF EPA HF (Model HNJC4-RFB) — 240W small form factor internal PSU is a compact internal power supply designed for compatible Dell small form factor desktops and workstations. The unit provides up to 240 watts of DC output with EPA high-efficiency operation and HF (high-frequency) filtering to reduce electromagnetic interference. Intended as a direct replacement or upgrade for existing SFF power modules, the Dell HNJC4-RFB restores reliable power delivery and helps maintain system stability in space-constrained systems.
Advantages
The Dell 240W SFF EPA HF (HNJC4-RFB) offers a balanced combination of power density and energy efficiency. EPA high-efficiency operation reduces power loss and can contribute to lower operating costs in continuous-use environments. HF filtering reduces electrical noise that can affect sensitive components, and the small form factor design enables installation in compact chassis without major modification. This unit follows Dell compatibility and mounting standards for straightforward replacement in supported models.
Suitable for
 Replacing a faulty or aging SFF power supply in compatible Dell small form factor desktops
 Upgrading an existing SFF PSU to restore full 240W capacity for workstation-class components
 Compact office PCs, point-of-sale systems, and space-limited workstations requiring a reliable internal PSU
 Environments where reduced electromagnetic interference is desired due to HF filtering
Key specifications
 Manufacturer: Dell
 Model / MPN: HNJC4-RFB
 EAN: 5715063002940
 Output power: 240W maximum
 Form factor: Small Form Factor (SFF) internal PSU
 Features: EPA high-efficiency operation, HF filtering for reduced interference
 Application: Compatible Dell SFF desktops and workstations (check chassis compatibility)
How to use
Power off the computer and disconnect all external power and peripherals before beginning. Open the SFF chassis following the system manufacturer’s service instructions. Remove the failed or original SFF power supply by disconnecting internal power cables and any retaining screws or brackets. Install the Dell 240W SFF EPA HF (HNJC4-RFB) in the same orientation, secure with the original mounting hardware, and reconnect the internal power connectors to the motherboard and drives. Close the chassis, reconnect external power, and perform a power-on and system check to confirm proper operation.
Usage recommendations
Verify chassis and connector compatibility with your Dell system model before purchase. Use only Dell-recommended installation procedures and anti-static precautions when handling the PSU. For systems that draw near the 240W limit, confirm the combined power requirements of installed components to ensure adequate headroom. If uncertain about installation, consult Dell technical documentation or a qualified technician.

## FAQ

### How much does the Dell Power Supply 240W SFF HNJC4-RFB cost, and is it available for purchase?

The price is 101.99 € (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 09.07.2026 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. 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.

### What is the warranty period?

All Dell products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Dell service centers and through AiO.lv

### 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