High Voltage Thick Film Resistors

VRW Series

High Voltage

Thick Film Resistors

SQP 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

05.08

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated voltage (1000hrs at 70˚C)

4

.

0

5*

.

1

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV)

5

1

.

0

1

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

1

.

0

5

.

1

%

R

Climatic sequence

2

.

0

5

.

1

%

R

Climatic category

55/155/56

Temperature rapid change

5

0

.

0

5

.

0

%

R

Resistance to solder heat

5

0

.

0

5

.

0

%

R

Vibration

5

0

.

0

5

.

0

%

R

n

i

m

0

0

7

s

tl

o

v

f

o

o

r

P

e

g

a

tl

o

V

71

Maximum peak voltage in accordance with “IEC 60065 chapter 14.1”

50 discharges from a 1nF capacitor charged to V max. 12 discharges/minute.

Application Notes

1. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An

estimate of the temperature rise to be expected at the center of the body can be calculated using the

thermal impedance figures given under Electrical Data.

2. VRW resistors can be supplied with radial, goalpost or lancet pre-formed leads. The VRW37 is also

available in ZI-form SMD format packed in blister tape - see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Packaging

Our standard packaging for VRW is taped and

boxed. The critical dimensions are shown in

Figure 1. The component wires will not

protrude beyond the outside edge of the

tapes. Alternative packaging is available by

request. Pre-formed resistors are supplied

loose packed in plastic bags or boxes.

Performance Data

Pulse Performace

VRW Series

Pulse Performance

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV or 10kV in air)

2

1

10

100

0.1

1

10

100

Value (megohms)

VRW25

VRW37

VRW68

Type

b

c

VRW25/37

52 ±2mm

5 ±0.5mm

VRW68

73 ±2mm

10 ±0.5mm

6

mm

2

f

1

f

6

mm

c

Body location f1-f2 1.4mm

b

* 2% for ohmic values above 24M

High Voltage

Thick Film Resistors

SQP 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

05.08

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated voltage (1000hrs at 70˚C)

4

.

0

5*

.

1

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV)

5

1

.

0

1

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

1

.

0

5

.

1

%

R

Climatic sequence

2

.

0

5

.

1

%

R

Climatic category

55/155/56

Temperature rapid change

5

0

.

0

5

.

0

%

R

Resistance to solder heat

5

0

.

0

5

.

0

%

R

Vibration

5

0

.

0

5

.

0

%

R

n

i

m

0

0

7

s

tl

o

v

f

o

o

r

P

e

g

a

tl

o

V

71

Maximum peak voltage in accordance with “IEC 60065 chapter 14.1”

50 discharges from a 1nF capacitor charged to V max. 12 discharges/minute.

Application Notes

1. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An

estimate of the temperature rise to be expected at the center of the body can be calculated using the

thermal impedance figures given under Electrical Data.

2. VRW resistors can be supplied with radial, goalpost or lancet pre-formed leads. The VRW37 is also

available in ZI-form SMD format packed in blister tape - see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Packaging

Our standard packaging for VRW is taped and

boxed. The critical dimensions are shown in

Figure 1. The component wires will not

protrude beyond the outside edge of the

tapes. Alternative packaging is available by

request. Pre-formed resistors are supplied

loose packed in plastic bags or boxes.

Performance Data

Pulse Performace

VRW Series

Pulse Performance

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV or 10kV in air)

2

1

10

100

0.1

1

10

100

Value (megohms)

VRW25

VRW37

VRW68

Type

b

c

VRW25/37

52 ±2mm

5 ±0.5mm

VRW68

73 ±2mm

10 ±0.5mm

6

mm

2

f

1

f

6

mm

c

Body location f1-f2 1.4mm

b

* 2% for ohmic values above 24M

High Voltage

Thick Film Resistors

SQP 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

05.08

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated voltage (1000hrs at 70˚C)

4

.

0

5*

.

1

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV)

5

1

.

0

1

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

1

.

0

5

.

1

%

R

Climatic sequence

2

.

0

5

.

1

%

R

Climatic category

55/155/56

Temperature rapid change

5

0

.

0

5

.

0

%

R

Resistance to solder heat

5

0

.

0

5

.

0

%

R

Vibration

5

0

.

0

5

.

0

%

R

n

i

m

0

0

7

s

tl

o

v

f

o

o

r

P

e

g

a

tl

o

V

71

Maximum peak voltage in accordance with “IEC 60065 chapter 14.1”

50 discharges from a 1nF capacitor charged to V max. 12 discharges/minute.

Application Notes

1. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An

estimate of the temperature rise to be expected at the center of the body can be calculated using the

thermal impedance figures given under Electrical Data.

2. VRW resistors can be supplied with radial, goalpost or lancet pre-formed leads. The VRW37 is also

available in ZI-form SMD format packed in blister tape - see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Packaging

Our standard packaging for VRW is taped and

boxed. The critical dimensions are shown in

Figure 1. The component wires will not

protrude beyond the outside edge of the

tapes. Alternative packaging is available by

request. Pre-formed resistors are supplied

loose packed in plastic bags or boxes.

Performance Data

Pulse Performace

VRW Series

Pulse Performance

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV or 10kV in air)

2

1

10

100

0.1

1

10

100

Value (megohms)

VRW25

VRW37

VRW68

Type

b

c

VRW25/37

52 ±2mm

5 ±0.5mm

VRW68

73 ±2mm

10 ±0.5mm

6

mm

2

f

1

f

6

mm

c

Body location f1-f2 1.4mm

b

* 2% for ohmic values above 24M

High Voltage

Thick Film Resistors

SQP 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

05.08

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated voltage (1000hrs at 70˚C)

4

.

0

5*

.

1

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV)

5

1

.

0

1

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

1

.

0

5

.

1

%

R

Climatic sequence

2

.

0

5

.

1

%

R

Climatic category

55/155/56

Temperature rapid change

5

0

.

0

5

.

0

%

R

Resistance to solder heat

5

0

.

0

5

.

0

%

R

Vibration

5

0

.

0

5

.

0

%

R

n

i

m

0

0

7

s

tl

o

v

f

o

o

r

P

e

g

a

tl

o

V

71

Maximum peak voltage in accordance with “IEC 60065 chapter 14.1”

50 discharges from a 1nF capacitor charged to V max. 12 discharges/minute.

Application Notes

1. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An

estimate of the temperature rise to be expected at the center of the body can be calculated using the

thermal impedance figures given under Electrical Data.

2. VRW resistors can be supplied with radial, goalpost or lancet pre-formed leads. The VRW37 is also

available in ZI-form SMD format packed in blister tape - see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Packaging

Our standard packaging for VRW is taped and

boxed. The critical dimensions are shown in

Figure 1. The component wires will not

protrude beyond the outside edge of the

tapes. Alternative packaging is available by

request. Pre-formed resistors are supplied

loose packed in plastic bags or boxes.

Performance Data

Pulse Performace

VRW Series

Pulse Performance

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV or 10kV in air)

2

1

10

100

0.1

1

10

100

Value (megohms)

VRW25

VRW37

VRW68

Type

b

c

VRW25/37

52 ±2mm

5 ±0.5mm

VRW68

73 ±2mm

10 ±0.5mm

6

mm

2

f

1

f

6

mm

c

Body location f1-f2 1.4mm

b

* 2% for ohmic values above 24M

2. VRW37 can be supplied with radial, goalpost or lancet pre-formed leads- see

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Application-Note/TN008-Resistors-Leadform-Capability.pdf

High Voltage

Thick Film Resistors

SQP 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

05.08

Welwyn Components

l

a

c

i

p

y

T

m

u

m

i

x

a

M

Load at rated voltage (1000hrs at 70˚C)

4

.

0

5*

.

1

%

R

C

˚

5

5

1

t

a

o

r

e

z

C

˚

0

7

t

a

r

e

w

o

p

d

e

t

a

r

m

o

r

f

g

n

it

a

r

e

D

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV)

5

1

.

0

1

%

R

Damp heat steady state (56 days, 40˚C, 90% RH)

1

.

0

5

.

1

%

R

Climatic sequence

2

.

0

5

.

1

%

R

Climatic category

55/155/56

Temperature rapid change

5

0

.

0

5

.

0

%

R

Resistance to solder heat

5

0

.

0

5

.

0

%

R

Vibration

5

0

.

0

5

.

0

%

R

n

i

m

0

0

7

s

tl

o

v

f

o

o

r

P

e

g

a

tl

o

V

71

Maximum peak voltage in accordance with “IEC 60065 chapter 14.1”

50 discharges from a 1nF capacitor charged to V max. 12 discharges/minute.

Application Notes

1. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An

estimate of the temperature rise to be expected at the center of the body can be calculated using the

thermal impedance figures given under Electrical Data.

2. VRW resistors can be supplied with radial, goalpost or lancet pre-formed leads. The VRW37 is also

available in ZI-form SMD format packed in blister tape - see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf

Packaging

Our standard packaging for VRW is taped and

boxed. The critical dimensions are shown in

Figure 1. The component wires will not

protrude beyond the outside edge of the

tapes. Alternative packaging is available by

request. Pre-formed resistors are supplied

loose packed in plastic bags or boxes.

Performance Data

Pulse Performace

VRW Series

Pulse Performance

Overload (10 x 5s at 6.25 x Pr not exceeding 2 x LEV or 10kV in air)

2

1

10

100

0.1

1

10

100

Value (megohms)

VRW25

VRW37

VRW68

Type

b

c

VRW25/37

52 ±2mm

5 ±0.5mm

VRW68

73 ±2mm

10 ±0.5mm

6

mm

2

f

1

f

6

mm

c

Body location f1-f2 1.4mm

b

* 2% for ohmic values above 24M

10.24

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

VRW37 is also available in ZI-form SMD format packed in blister tape- see

https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf