Vitreous Enamelled

Wirewound Resistors

V700 (RB Style) Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

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

09. 11

L

f1

f2

6

6

10

f1 – f 2 ≤ 1.4 mm

Terminations

Material

Copper clad steel wire, nickel plated and

solder-coated.

Vitreous Enamelled

Wirewound Resistors

V700 (RB Style) Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

88

03. 08

Welwyn Components

Actual Performance

Maximum

Typical

Load at rated power: 1000 hrs

∆R%

5

3.5

Dry heat: 1000 hours at 200°c

∆R%

2

Shelf life: 12 mths at room temp

∆R%

0.03

0.02

Derating from rated power at 25°C

∆R%

See derating curve

Short term overload

∆R%

1.5

0.5

Climatic

∆R%

0.5

0.2

Climatic category

∆R%

55/200/56

55/200/56

Long term damp heat

∆R%

0.05

0.02

Temperature rapid change

∆R%

0.5

0.05

Resistance to solder heat

∆R%

0.25

0.03

Vibration

∆R%

0.25

0.05

Noise (µV/V in a decade of freqency)

zero

Shock

∆R%

0.2

0.05

Pulse handling

Data available by request

Strength

The terminations meet requirements of

IEC 68.2.21.

Solderability The terminations meet the requirements of IEC

115-1, Clause 4.17.3.2.

Performance Data

25

70

200

315

116

100

54

0

Ambient temperature

°C

Derating Curve

Packaging

For RB59 and RB61 the standard method of packaging is

taped and Ammo Packed.

For RB57, the standard method of packaging is taped and

reeled. RB58 and RB60 are loose packed in boxes.

Alternative packaging available by request.

Type

L

V759

63

V757

73

V761

73

Application Notes

The terminations should not be bent closer than 1.6mm from

the body, and the recommended minimum bend radius is

1.2mm. If resistors are to dissipate full rated power, the

terminations should not be soldered closer than 4mm from

the body.

When cold, vitreous enamel has excellent insulation

resistance. In common with all insulants the specific resistance

of the enamel decreases with increase in temperature.

Therefore, resistors operated at near maximum temperature

cannot be classed as insulated and should not be used in

contact with any conducting material.

Care must be taken when determining clearance distance

between the resistor body and the printed circuit board or

other components to ensure these are not over heated.

Resistance is measured 6mm from the body.

1

L

f1

f2

6

6

10

f1 – f 2 ≤ 1.4 mm

Terminations

Material

Copper clad steel wire, nickel plated and

solder-coated.

Vitreous Enamelled

Wirewound Resistors

V700 (RB Style) Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

88

03. 08

Welwyn Components

Actual Performance

Maximum

Typical

Load at rated power: 1000 hrs

∆R%

5

3.5

Dry heat: 1000 hours at 200°c

∆R%

2

Shelf life: 12 mths at room temp

∆R%

0.03

0.02

Derating from rated power at 25°C

∆R%

See derating curve

Short term overload

∆R%

1.5

0.5

Climatic

∆R%

0.5

0.2

Climatic category

∆R%

55/200/56

55/200/56

Long term damp heat

∆R%

0.05

0.02

Temperature rapid change

∆R%

0.5

0.05

Resistance to solder heat

∆R%

0.25

0.03

Vibration

∆R%

0.25

0.05

Noise (µV/V in a decade of freqency)

zero

Shock

∆R%

0.2

0.05

Pulse handling

Data available by request

Strength

The terminations meet requirements of

IEC 68.2.21.

Solderability The terminations meet the requirements of IEC

115-1, Clause 4.17.3.2.

Performance Data

25

70

200

315

116

100

54

0

Ambient temperature

°C

Derating Curve

Packaging

For RB59 and RB61 the standard method of packaging is

taped and Ammo Packed.

For RB57, the standard method of packaging is taped and

reeled. RB58 and RB60 are loose packed in boxes.

Alternative packaging available by request.

Type

L

V759

63

V757

73

V761

73

Application Notes

The terminations should not be bent closer than 1.6mm from

the body, and the recommended minimum bend radius is

1.2mm. If resistors are to dissipate full rated power, the

terminations should not be soldered closer than 4mm from

the body.

When cold, vitreous enamel has excellent insulation

resistance. In common with all insulants the specific resistance

of the enamel decreases with increase in temperature.

Therefore, resistors operated at near maximum temperature

cannot be classed as insulated and should not be used in

contact with any conducting material.

Care must be taken when determining clearance distance

between the resistor body and the printed circuit board or

other components to ensure these are not over heated.

Resistance is measured 6mm from the body.

1

L

f1

f2

6

6

10

f1 – f 2 ≤ 1.4 mm

Terminations

Material

Copper clad steel wire, nickel plated and

solder-coated.

Vitreous Enamelled

Wirewound Resistors

V700 (RB Style) Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

88

03. 08

Welwyn Components

Actual Performance

Maximum

Typical

Load at rated power: 1000 hrs

∆R%

5

3.5

Dry heat: 1000 hours at 200°c

∆R%

2

Shelf life: 12 mths at room temp

∆R%

0.03

0.02

Derating from rated power at 25°C

∆R%

See derating curve

Short term overload

∆R%

1.5

0.5

Climatic

∆R%

0.5

0.2

Climatic category

∆R%

55/200/56

55/200/56

Long term damp heat

∆R%

0.05

0.02

Temperature rapid change

∆R%

0.5

0.05

Resistance to solder heat

∆R%

0.25

0.03

Vibration

∆R%

0.25

0.05

Noise (µV/V in a decade of freqency)

zero

Shock

∆R%

0.2

0.05

Pulse handling

Data available by request

Strength

The terminations meet requirements of

IEC 68.2.21.

Solderability The terminations meet the requirements of IEC

115-1, Clause 4.17.3.2.

Performance Data

25

70

200

315

116

100

54

0

Ambient temperature

°C

Derating Curve

Packaging

For RB59 and RB61 the standard method of packaging is

taped and Ammo Packed.

For RB57, the standard method of packaging is taped and

reeled. RB58 and RB60 are loose packed in boxes.

Alternative packaging available by request.

Type

L

V759

63

V757

73

V761

73

Application Notes

The terminations should not be bent closer than 1.6mm from

the body, and the recommended minimum bend radius is

1.2mm. If resistors are to dissipate full rated power, the

terminations should not be soldered closer than 4mm from

the body.

When cold, vitreous enamel has excellent insulation

resistance. In common with all insulants the specific resistance

of the enamel decreases with increase in temperature.

Therefore, resistors operated at near maximum temperature

cannot be classed as insulated and should not be used in

contact with any conducting material.

Care must be taken when determining clearance distance

between the resistor body and the printed circuit board or

other components to ensure these are not over heated.

Resistance is measured 6mm from the body.

1

L

f1

f2

6

6

10

f1 – f 2 ≤ 1.4 mm

Terminations

Material

Copper clad steel wire, nickel plated and

solder-coated.

Vitreous Enamelled

Wirewound Resistors

V700 (RB Style) Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

88

03. 08

Welwyn Components

Actual Performance

Maximum

Typical

Load at rated power: 1000 hrs

∆R%

5

3.5

Dry heat: 1000 hours at 200°c

∆R%

2

Shelf life: 12 mths at room temp

∆R%

0.03

0.02

Derating from rated power at 25°C

∆R%

See derating curve

Short term overload

∆R%

1.5

0.5

Climatic

∆R%

0.5

0.2

Climatic category

∆R%

55/200/56

55/200/56

Long term damp heat

∆R%

0.05

0.02

Temperature rapid change

∆R%

0.5

0.05

Resistance to solder heat

∆R%

0.25

0.03

Vibration

∆R%

0.25

0.05

Noise (µV/V in a decade of freqency)

zero

Shock

∆R%

0.2

0.05

Pulse handling

Data available by request

Strength

The terminations meet requirements of

IEC 68.2.21.

Solderability The terminations meet the requirements of IEC

115-1, Clause 4.17.3.2.

Performance Data

25

70

200

315

116

100

54

0

Ambient temperature

°C

Derating Curve

Packaging

For RB59 and RB61 the standard method of packaging is

taped and Ammo Packed.

For RB57, the standard method of packaging is taped and

reeled. RB58 and RB60 are loose packed in boxes.

Alternative packaging available by request.

Type

L

V759

63

V757

73

V761

73

Application Notes

The terminations should not be bent closer than 1.6mm from

the body, and the recommended minimum bend radius is

1.2mm. If resistors are to dissipate full rated power, the

terminations should not be soldered closer than 4mm from

the body.

When cold, vitreous enamel has excellent insulation

resistance. In common with all insulants the specific resistance

of the enamel decreases with increase in temperature.

Therefore, resistors operated at near maximum temperature

cannot be classed as insulated and should not be used in

contact with any conducting material.

Care must be taken when determining clearance distance

between the resistor body and the printed circuit board or

other components to ensure these are not over heated.

Resistance is measured 6mm from the body.

1

OBSOLETE

(RB58 & RB60 ONLY)