4.2V 40A 170W switching power supply

Brand : Cassspower
Product origin : Shenzhen, China
Delivery time : 30 days
Supply capacity : 50K

Industrial aluminum shell power supply

Single output switching power supply

170W 4.2V 40A switching power supply


·Wide range input from 100~240Vac .

·105℃ output capacitor.

·Built-in EMI filter, low ripple .

·Protections: Short circuit / Over current / Over voltage/Over load, it is reliability and stability.

·High efficiency is ≥88% .

·Complete protection function with high precision constant output current, low noise as well.

·The most economical & useful power supply with low wattage,100% full load burn-in test.

·Soft startup power supply, effectively reduce the impact degree of AC input.

·2 years warranty.

P.S: Constant voltage power supply for industrial using;


Environmental Requirement


Operating:-25ºC to +60ºC.

Note: the power can power on and work@-40 ºC

-40 ºC

Storage :-40 ºC to +85 ºC


Operating:From 10% to 90% relative humidity(non-condensing).

Storage:From 5% to 95% relative humidity(non-condensing).


Operating: -60 to 5000m

Storage: up to 5000m

Mounting Dimension:

9. Pictures:

Requirements for Burning in Test.

We recommend that the power supply should be mounted tightly with the heatsink described as the following heatsink drawing while the products burn in at 40ºC and 220Vac input.


- CE



- RoHS

- Fireproof DIN4102-1 class B1

Packaging and Transport :

Standard export carton. Each piece is packed by vacuum plastic bag into a inner box then 1pcs to a carton.

Delivery Detail: 5-15working days against payment.

Our Services

1. Any inquiries will be replied within 24 hours;

2. Professional manufacturer , welcome to visit our website;

3. OEM/ODM available:

a) Print logo on our products

b) Customized specification

c) Customized color package box

d) Any your idea on our products,we can help you to design and put it into production

4. High qulity,fashion design,reasonable&competitive price,fast lead time

5. After-sale service:

a) All products will have been strictly quality checked in test house before packing

b) All products will be well packed before shipping

c) All products have 1-2 years warranty, and we sure the products will be free from maintenance within warranty period

6. Faster delivery:

Sample order in stock, and 3-7days for bulk production

7. Payment term:

L/C T/T open account transaction, westion union & paypal


Q: Are our products durable ?

1).We offer 2-year-warranty

2).The tech support & parts replacement are offered for free

3).Our products are also used in our own office and workshop

4).The components used are of quality insurrance

5) .All the products must be tested before being shipped

6) .We own CE CCC RoHS ISO9001 IP67certificates

7) .Our company has been engaged in designing and manufacturing power supply for more then 10 years

Q:whether offer free samples?

A:yes,we offer free samples<5pcs,>5pcs need samples cost.

Q:How to order our product ?

A:1).Please tell us the model and quantity and other request you need.

2).We make the PI for you.

3).After you confirm the PI, we arrange the order for you after receiving your payment.

4).After the goods finished, we send the goods out to you and tell you the tracking number.

5).We will track your goods until you receive the goods.

Q: What's your shipment method?

A: We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide customer the most proper shipment method.

Q: What's about MOQ?

A: First order MOQ=1pcs

Q: If i want to release order, what's the payment method you accept ?

A: We accept T/T, Paypal, Western union, L/C.

Q: If i want to release order, what's the process?

A: Thanks. You can send inquiry to us by alibaba, or send us by email, we will reply within 24hrs.

Q: In use process if have a few bad products needs to be repaired, how to do?

A:you can send back to us,we offer free repair,and will resend to you with the next order.

Q:Could we return goods if we couldn't sell it out in our market?

A:yes,you can,as long as don't affect our secondary sales.

Q:How to contact us?

A:Send your Inquiry Details in the Below, Click "Send" Now !

Please feel free to give your inquiry in the form below. We will reply you in 24 hours.