Z300-Cxx

www.vishay.com

Vishay Draloric

Revision: 14-Mar-2019

3

Document Number: 21027

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DESCRIPTION

Wirewound resistors are best suited for use in high power,

high current applications. The silicon cement lacquer

coating enables Z300-Cxx to withstand challenging high

voltage surge conditions.

Suitable ohmic value with desired surge voltage handling

can be selected using table “Minimum Resistance Value for

Handling Surge Voltage as per IEC 61000-4-5 (1.2 / 50 μs

Pulse)” on page 2. The ceramic meets the highest

requirements

against

mechanical

resistance,

thermal

shocks, dielectric strength, and insulation resistance at high

temperatures. With different diameters and turn spacing's, a

large ohmic value range can be covered. The coating is

The resistors are marked with resistance and tolerance.

Product quality is verified by testing procedures, performed

on all individual resistors. Resistance is measured on the

lead wires at a distance of 6 mm from the resistor body. If a

greater length of lead wire is used in the application, the user

may need to consider the additional wire resistance,

particularly with low resistance products.

MATERIALS

Vishay acknowledges the following systems for the

regulation of hazardous substances:

• IEC 62474, Material Declaration for Products of and for the

Electrotechnical Industry, with the list of declarable

• The

Global

Automotive

Declarable

Substance

List

• The REACH regulation (1907/2006/EC) and the related list

supply chain

The products do not contain any of the banned substances

as per IEC 62474, GADSL, or the SVHC list, see

comply with the following directives:

• 2000/53/EC End-of-Life Vehicle Directive (ELV) and

Annex II (ELV II)

• 2011/65/EU

Restriction

of

the

Use

of

Hazardous

Substances

Directive

(RoHS)

with

amendment

2015/863/EU

• 2012/19/EU Waste Electrical and Electronic Equipment

Directive (WEEE)

Vishay pursues the elimination of conflict minerals from its

supply

chain,

see

the

Conflict

Minerals

Policy

at

ASSEMBLY

The resistors are axial leaded for soldering. The terminals of

the resistors are completely lead (Pb)-free, the special tin

plating provides compatibility with lead (Pb)-free and

lead-containing soldering processes.

Special lead forms may be available on request, please

These components are high dissipation power resistors,

customers are advised to use a high melting point solder.

APPLICATION INFORMATION

The

power

dissipation

of

the

resistor

generates

a

temperature rise with respect to the ambient. The

permissible dissipation is derated for temperatures above

40 °C, as shown in the derating diagram, in order to avoid

overheating of the resistor. The heat dissipated from the

resistor may affect adjacent components, hence proper

clearance will be required in order to avoid overheating. The

resistive wire is hermetically encapsulated.

All materials used are non-flammable and inorganic. These

resistors do not feature a limited lifetime when operated

within the permissible limits. However, resistance value drift

increasing over operating time may result in exceeding a

limit acceptable to the specific application, thereby

establishing a functional lifetime.

RELATED PRODUCTS

In similar continuous power applications and challenging

environmental conditions, see the datasheets:

• AC Series - Cemented Wirewound Resistors



www.vishay.com/doc?28730

• Z300-C00 - Commercial Axial Cemented Wirewound

Resistors



www.vishay.com/doc?21047

For precision applications, there is the cement coated PAC

series, see the datasheet:

• PAC Series - Cemented Wirewound Precision Resistors



www.vishay.com/doc?28731

Notes