C&H Technology RSSD User Manual

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Suite 108
Minnetonka, MN 55345

www.chtechnology.com

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Fax [phone]

1-800-274-4284

Thank you for downloading this document from C&H Technology, Inc.

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Technical

Application

Assembly

Availability

Pricing

Phone – 1-800-274-4284

E-Mail – [e-mail]

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RSSD

Vishay Sfernice

Adjustable Wirewound Vitreous Resistors

Low Ohmic Values (0.10 Ω available)

FEATURES

• High power rating: 16 W to 600 W at 25 °C

• Heavy overloads 10 Pn 15 s ≤ 1 %

• Low ohmic values 0.10 Ω available

• High long term stability drift < 1.5 % after 1000 h

• Excellent withstanding of thermal shock

• Mechanical strength

CS collars

RSSD medium and high power resistors are noted for their ability to withstand heavy transient and severe shock and vibration
conditions. They complement the ohmic range of Vishay styles RW, RWST and RA in the low value area, and can be tapped by
means of adjustable collars. Standard RSSD resistors have a single adjustable collar.

DIMENSIONS

WELDED STAINLESS STEEL 304 L COLLARS “AN” TYPE 1

Ty pe 1

Solded

¯ C

P

¯ Q

ZF

¯ B

A

F

R

D

SCREWED STAINLESS STEEL 304 L COLLARS “CS” TYPE 1

A

J

¯ B

26

G

H

15

L

SCREWED STAINLESS STEEL 304 L COLLARS “CS” TYPE 2

A

23

¯ B

G

H

58

15

L

Ty pe 2

Screwed

¯ C

E

¯ C

K

M

J

K

P

¯ C

M

• Fire proof

DIMENSIONS in millimeters

RSSD STYLE 8 × 34 10 × 50 13 × 70 16 × 94 20 × 117

Connection

A ± 2 34 50 70 94 117
Ø B max. 10 11.5 14.5 18 22
Ø C min. 4.1 5 6.7 9.2 12.6
D 27 ± 2 40 ± 2 56 ± 2 78 ± 2 98 ± 2
E 20 ± 05 22 ± 0.5 24 ± 0.5 26.5 ± 0.5 31 ± 0.7
F+ 0.5

+ 0
P 28 ± 1 31 ± 1 34 ± 1 38 ± 1 42 ± 1
Ø Q 3.2 4.2 4.2 4.2 4.2
R 16 ± 0.5 18 ± 0.5 20 ± 0.5 21 ± 0.5 24 ± 0.7
Z approx. 1 1.5 3.5 4 5
Average unit AN

weight in g

* CS connections on request

AN

type 1ANtype 1

5 6.35 6.35 6.35 6.35

10 22 38 55 80

AN

type 1

CS*

AN

type 1ANtype 1

DIMENSIONS in millimeters

RSSD STYLE 25 × 138 25 × 168 30 × 250 40 × 370 50 × 373

Connection

A ± 2 138 168 250 370 373
Ø B max. 27 27 32 43 53
Ø C min. 16.4 16.4 21.3 22.3 27.1
D 117 ± 2 147 ± 2 227 ± 2.5 332 ± 3 332 ± 3
E 33.5 ± 1 33.5 ± 1 36 ± 1 57 ± 1.5 63 ± 1.5
F + 0.5

+ 0
G- 4

- 0

H- 4

- 0
J 50 ± 1.5 50 ± 1.5 60 ± 1.5 69 max. 80 max.
K 27 ± 1 27 ± 1 30 ± 1 45 ± 1 51 ± 1.5
L ± 0.5 6.5 6.5 9 9 9
M ± 0.5 2424253030
P 51 ± 1.5 51 ± 1.5 55 ± 1.5 81.5 max. 92.5 max.
Ø Q 5.7 5.7 5.7 9.2 9.2
R 28.5 ± 1 28.5 ± 1 31 ± 1 45 ± 1.5 51 ± 1.5
Z approx. 6 6 5 10 11.5
Average unit

weight in g

AN

type 1ANtype 1ANtype 1ANtype 2ANtype 2

CS

type 1CStype 1CStype 1CStype 2CStype 2

9 9 13 18 18

199 229 317 432 432

169 199 287 405 405

AN 90 115 240 845 1270
CS 135 160 290 925 1350

www.vishay.com For technical questions, contact: [e-mail] Document Number: 50020
70 Revision: 24-Jan-07

RSSD

Adjustable Wirewound Vitreous Resistors

Vishay Sfernice

Low Ohmic Values (0.10 Ω available)

MECHANICAL SPECIFICATIONS

Mechanical Protection
Resistive Element nickel alloy wire
Connections AN collars

Average Unit Weight 10 to 1350 g

Vishay Sfernice Special cement

CS supporting collars

ENVIRONMENTAL SPECIFICATIONS

Temperature Limits - 55 °C + 450 °C
Climatic Category - 55 °C/+ 200 °C/56 days

PERFORMANCE

TESTS CONDITIONS REQUIREMENTS

Short Time Overload 10 Pr during 5 s 2 % 1 %

Climatic Sequence

Thermal Shock

Load Life

- 55 °C + 200 °C
5 cycles

Load at 100 % Pr

followed by cold - 55 °C/15

90/30 cycle

1000 h at Pr at + 25 °C

ELECTRICAL SPECIFICATIONS

Resistance Range

Standard Resistance R ≥ 10 Ω ± 5 %

Tol erance

Power Rating 14 W to 600 W at 25 °C

Temperature Coefficient + 75 ppm/°C (typical)

3 % 1 %

2 %

or 0.05 Ω

5 % 1.5 %

0.12 Ω to 560 Ω
(E12 series)

1 Ω ≤ R ≤ 10 Ω ± 10 %

0R1 ≤ R < 1 Ω ± 20 %

TYPICAL

VAL UE S

AND DRIFTS

1 %

SPECIAL FEATURES

RSSD TYPE 8 × 34 10 × 50 13 × 70 16 × 94 20 × 117 25 × 138 25 × 168 30 × 250 40 × 370 50 × 373

Powe r Ratin g
at 25 °C

Resistance Ohmic Range
(E12, E24 Series)
with 1 Tapping

Maximum Number
of Additional
Tapping

Reduction % of Ohmic
Value by Tapping

Continuous 16 W 25 W 42 W 70 W 100 W 140 W 200 W 280 W 450 W 600 W

Reduced 14 W 22 W 38 W 62 W 90 W 125 W 170 W 240 W 360 W 450 W

0.12 Ω
10 Ω

23 21 14 11 10 8 6.5 6 5.7 5.7

0.12 Ω
22 Ω

0 1 1 1 1 1 2 2 4 4

0.12 Ω
43 Ω

0.33 Ω
75 Ω

0.22 Ω
100 Ω

0.10 Ω
150 Ω

0.12 Ω
220 Ω

0.22 Ω
360 Ω

0.47 Ω
470 Ω

0.68 Ω
560 Ω

ADDITIONAL TAPPINGS

Are supplied with their adjustable collars fastened but not set to any specifi c value. Please note that, on request, all tappings can
be adjusted by VISHAY SFERNICE. For adjustment purposes we would need to be advised of the ohmic values, and tolerances
of the sections in successive order in addition to their sum Rn.

The permissible maximum value for an adjustment should take into account the possible negative tolerance of Rn.

Please consult VISHAY SFERNICE regarding the acceptable tolerance.

RECOMMENDATIONS FOR USE

Maximum Current Strength:

The ohmic value and the power decrease as the connections are brought together. To avoid overload, the maximum current
strength that is permissible for Rn should never be exceeded:

I

=

Pr/Rn

max

Document Number: 50020 For technical questions, contact: [e-mail]
Revision: 24-Jan-07 71

www.vishay.com

RSSD

Vishay Sfernice

POWER RATING CHART

TEMPERATURE RISE

Adjustable Wirewound Vitreous Resistors

Low Ohmic Values (0.10 Ω available)

100

80

60

% RATED POWER

40

0

0 100 200 300 400 450

AMBIENT TEMPERATURE IN DEGREES CELSIUS

7

8

1

3

0

4

5

400

C
°

N
I
ERUT

300

A
REPM

200

ET T

OP
S

TOH

100

3

x

x

0

8

1

D

D

S

S

S

S

R

R

R

4

07

1

9

x

x

x

0

31

D

D

S

SS

S

R

5

6

2

2

1

D

SD

S

S

S

R

R

S

R

0

8

1

5

6

2

1

x

x

x

0

5

3

2

D

D

S

S

S

S

S

R

R

0

3

7

7

3

3

x

0

0x

4

5

D

D

S

S

R

0

10 100 1000

RATED POWER IN WATTS

MARKING

SFERNICE trademark, model, style, nominal resistance (in Ω), tolerance (in %), manufacturing date.

ORDERING INFORMATION

RSSD 10 × 50 AN 10U 5 % BA25 e

MODEL STYLE SPECIAL

CONNECTIONS

TOLERANCE PACKAGING LEAD

DESIGN

Method N°

Optional

Custom items are subject to
extra charge and min. order.

Please see price list.

SAP PART NUMBERING GUIDELINES

RSSD 10 × 50 A 10R0 J S06

MODEL STYLE CONNECTIONS OHMIC VALUE TOLERANCE PACKAGING

(Pb)-FREE

www.vishay.com For technical questions, contact: [e-mail] Document Number: 50020
72 Revision: 24-Jan-07