HW-140 DC-DC Buck Boost Converter Step Up/Down, LCD display
📦 Location of the warehouse: China
Free shipping for you
Free Shipping from 30€ in Germany, 50€ in the EU!
Trustpilot rating: 4.4/5.0
Thank you for your support - rate us on Trustpilot!
HW-140 DC-DC Buck Boost Converter Step Up/Down, LCD display
HW-140 DC-DC Buck Boost Converter Step Up/Down
The HW-140 power supply module is a multi-functional product that displays the input and output voltage, current or power in real time, switching via the IN/OUT buttons.The ON/OFF button is used to turn off the display or the output and to indicate the output status via LEDs. Voltage and current are adjusted by independent trimmers accurate to 0.01V and 0.001A respectively, and the CC lamp will light up when the current reaches the set value. The modules have a soft start and a built-in anti-reflow diode for a wide range of applications, especially to prevent reverse current flow and provide reverse connection protection during charging.
Specifications:
-
Input voltage: 5.5-30V
-
Output voltage: 0.5-30V
-
Output current: 3a constant, with additional cooling up to 4a
-
Efficiency: ~ 88%
-
Switching frequency: 180kHz
-
Measurement accuracy: +-5%
-
Dimensions: 66x48x22mm
-
Weight: 47g
1. General Shipping Information
- We provide premium shipping methods with a tracking number for each order.
-
Shipping address should be input in English without any special symbols to help the courier company recognize your address in the system. We will ship according to the shipping address you provided. Please notify us of any address change before your order is marked "Shipped" to avoid parcel loss.
-
Please contact our customer service staff immediately if you need to cancel or change an order. Once your order has reached "Shipped" status, it can no longer be canceled or changed in any way. To avoid complications, please recheck your shopping cart before checkout.
-
We can ship all in-stock orders within 1 business day as your order has been confirmed.
-
All items are inspected before dispatch and are carefully hand-packed.
-
With standard courier practice, you need to check the contents of the parcel before signing for your goods. Otherwise, we will not be held responsible for any damage that may have occurred in transit.
2. Shipping Options for Germany and EU* countries
(For Products in Munich Warehouse)
2.1 Shipping options for an order value of up to €30 inside Germany or €50 inside the EU*
Shipping Options:
| Shipping Options | Germany | EU* |
|---|---|---|
|
Deutsche Post |
€3.5 Arrive in 3-4 Business Days |
€6 Arrive in 5-9 Business Days |
|
DHL Paket |
€6 Arrive in 2-3 Business Days |
€15 Arrive in 3-7 Business Days |
|
DHL Express |
€14 Arrive in 1-2 Business Day |
€65 Arrive in 2-3 Business Days |
2.2 Free shipping options for an order value of above €30 inside Germany or €50 inside the EU*:
| Free Shipping Options | Germany | EU* |
|---|---|---|
|
Deutsche Post |
Free Above €30 | Free Above €50 |
|
DHL Paket |
+ €2 for Above €30 / Free Above €60 | + €8 for Above €50 / Free Above €80 |
|
DHL Express |
+ €10 for Above €30 | + €60 for Above €50 |
-
Certain EU Countries are not included in our EU Zone definition: United Kingdom (excluding Ireland), Switzerland, Liechtenstein, Vatican City, Albania, Belarus, Norway, Ukraine, and Iceland. For the above countries, the International Shipping Rule applies.
2.3 Shipping Options for International Countries:
(via Deutsche Post or YunExpress)
| Order Amount | International |
|---|---|
| €0 - €15 | €8 |
| €15 - €30 | €7 |
| €30 - €50 | €6 |
| €50 and above | €4 |
Important Notice:
- Please verify the inventory location on the product page before placing your order to confirm delivery timeframes.
- For products in the Shenzhen warehouse, we will typically first ship the products from the Shenzhen warehouse to our Munich warehouse, which will take around 1.5 weeks. After we receive the shipment in Munich, we will send the items to you. We will only arrange YunExpress shipping from Shenzhen for orders with products in the Shenzhen warehouse worth more than €50.
- If you place an order with products from both Munich and Shenzhen warehouses, we will first ship the products in the Munich warehouse, and then send the remaining products to you when we receive them from Shenzhen.
3. International Warehouse
3.1 German Warehouse
3.2 Chinese Warehouse
4. Customs and Taxes
4.1 How are customs handled by OpenELAB for import or export?
4.2 How is VAT charged when the Customer places an order from OpenELAB?
4.3 What kind of fee will be charged except VAT?
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
1. Warranty Disclaimer
Unless explicitly stated in a specific agreement or purchase order, OpenELAB makes no warranties—express or implied—regarding the fitness, suitability, or merchantability of any product for a particular purpose or special use.
2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
- Unauthorized repair attempts by the customer.
- The product is not defective but has been opened and is non-returnable by policy.
3. Returns & Refunds
If you're not satisfied with your purchase, you may be eligible for a return or exchange:
- Return for Refund: Within 15 days of receipt (unopened).
- Return for Replacement: Within 30 days of receipt (damaged or defective).
- Exchange Window: Up to 30 days from receipt.
Please email us at info@openelab.io for a return authorization before sending anything back.
Return Conditions
- Items must be in original, clean, and mint condition with packaging intact.
- Returns of damaged, used, scratched, modified, or programmed items will not be accepted.
- Include the receipt, a brief note with your name, order number, and reason for return.
Shipping & Fees
- Customers are responsible for return shipping to our warehouses in Europe, the US, or China.
- Refunds may be subject to additional shipping fees unless the return is due to our error.
- A flat €8 shipping fee will be deducted for returned items that originally qualified for free shipping.
Payment Platform Fees
For refunds processed through third-party platforms such as PayPal or Braintree, a standard 3.5% service fee may be deducted to cover payment processing costs.
