Frequently Asked Questions |Sanken Electric


Frequently Asked Questions

Regarding This Website

Q:What does the "product status" indicated in the product list represent?

A: The "status" indicated next to each product is defined as follows:

Under Development Product is currently under development. Please contact us for further information on these products.
In production (NEW) New product which have just began production.
In production Product is currently in production.
Not Recommended for New Design (NRND) Product may become discontinued. Please do not use these products in new models.
Discontinued We have ceased production and is no longer available.
Click here to search for replacement parts.

Before Purchasing

Q:How can I check if the product is RoHS compliant?

A: Please click here for details on our RoHS compliance policy.

Q:What types of taping specifications for Diodes are available? How can I specify the type at the time of order?

A: Please refer to the "Taping Specifications for Diodes” for details and specify the type at the time of order.

After Purchasing

Q:What are the precautions on handling the products?

A: Please see the Reliability Information page to learn about precautions on handling our semiconductor products.
Please refer to the "Precautions for use " in section 4.

Q:What do the Lot numbers on the packages represent?

A: The lot numbers (4 digits, combination of letters and numbers) represent the manufacturing date of the product.
Please refer to below:
(Position of the branding may vary depending on the product. Some do not have branding marks)
    Digit1:       Year (last digit of the year of manufacture)
    Digit2:       Month ... 1 to 9 = Represents Jan to September, O= October, N= November, D= Decemeber
    Digit 3, 4:   Day

    example: 3212= manufacturing date is year xxx3, Februay 12

Q:How can I find a replacement part?

A: Information of "Not Recommended for New Design" and "Discontinued" products can be found on our Discontinued Product page.
Products with equal or similar specs and functions are available as replacements.
If there is no product name indicated in the "alternative" column, there is no replacement part for the product.

Q:What does a suffix, such as “V”, “V0”, “VL”, “WS”, etc, to the product name indicate?

A: The suffix “V”, “V1”, “V0”, “VL”, “VR”, “W”, “WS”, “WK” attached to a part number on a purchased product indicates taping specifications. Please refer to the "Taping Specifications for Diodes” for details.

Technical Questions

Q:Are there any precautions when mounting the semiconductor on to the PCB substrate?

A: When not handled properly, the characteristics and reliability of the product may be affected.
For details, please refer to the "Precautions for parts mounting "posted in the Quality and Reliability data.

Q:Are there any precautions when conducting substrate test or mounting test?

A: Breakdowns occur during function tests (FT) due to electrial over stress (i.e. over voltage), and therefore must be handled with caution.
For details, please refer to the "Precautions for substrate test and mounting test" posted in the Quality and Reliability data.

Q:How can I protect the semiconductor from electrostatic breakdown?

A: Since semiconductors can be damaged by static electricity, it must be handled with much caution.
When using the product please take the necessary actions to eliminate static electricity.
For details, please refer to the "Measures against static electricity" posted in the Quality and Reliability Information

Q:How do I estimate the junction temperature?

A:Junction temperature of the semiconductor can be estimated by measuring its temperature (case temperature, ambient temperature) and its loss during operation. Junction temperature can be calculated with the following equation.
● Estimating junction temperature from the case temperature
    TJ = P × R(J-C) + TC
    P: Total loss of the semiconductor(1)
    R(J-C) : Thermal resistance (junction to case)
    TC: Case temperature (measured value)(2)

● Estimating junction temperature from the ambient temperature
    TJ = P × R(J-A) + TA
    P: Total loss of the semiconductor(1)
    R(J-A) : Thermal resistance (junction to ambient)
    TA: Ambient temperature (measured value)

(1) Because the total loss of a semiconductor depends on the product, please be sure to calculate according to the condition of each product.
(2) Because the measurement point of the case temperature that defines the thermal resistance depends on the product, please refer to the datasheet of each product for details.

About Sanken Electric

Q:Where can I find information on Sanken Electric?

A: Click here for Sanken Electric's corporate profile and investor relations page.

Q:What kinds of products do you carry besides semiconductors?

A: Sanken Electrics also manufactures LED lighting, UPS, large-size power supplies, switching power supplies, adapters, etc.
Click here for additional information.

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