Impervious lead free vitreous enamel coating

Can be supplied with fixed, adjustable, tapped or

low inductance winding

Seven termination styles with choice of mounting arrangements

Manufactured RoHS compliant Pb-free terminations

Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

tapped or low inductance winding

mounting arrangements

Pb-free terminations*

* Check status of stock when ordering

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data, relates to current manufacture and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

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Electrical Data

09.09

A subsidiary of

TT electronics plc

Welwyn Components

Note See Figure 1 for curves of temperature rise / watts dissipation.

General Information

Vitreous enamelled wirewound resistors are capable of

withstanding a higher dissipation size for size, than any other

protected type; this is attributable to the higher operating

temperature which the wire and enamel can withstand.

Vitreous enamel provides exceptionally good protection to the

wire element and is essentially impervious to moisture. The

resistors can safely be used in harsh environmental conditions.

The Welwyn range is based on thirteen sizes of tube, each of

which has a recommended maximum dissipation which limits

operating surface temperature to a maximum of 375°C.

The stability and high reliability of Welwyn tubular vitreous

resistors is a direct result of the best quality materials being

used in their construction.

High purity ceramic tubes have been matched with nickel

chromium resistance wires and specially formulated enamel to

ensure that the resistors can withstand repeated heat cycling

without damage.

Connections between the resistance element and end

terminations are welded; other connections are brazed.

Mounting devices are available which permit resistors to be

mounted by both ends or by one end. Single ended mounting

is recommended for applications which do not subject the

resistor to shock or vibration.

Ferrules and the F type mounting plug are anchored into the

tubes with high temperature adhesive.

Special requirements, for types or styles not described

in this brochure, will be considered for economic

quantities.

Resistors

All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)

11.17

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

© TT Electronics plc

www.ttelectronics.com/resistors

BI Technologies IRC Welwyn