WH50-22RJI - TT Electronics [Welwyn]

Aluminium Housed

Wirewound Resistors

WH 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.

07. 12

· High power dissipation up to 300W

· All welded construction

· Suitable for severe environments

· Designed for excellent thermal conductivity to heatsink

· Spade terminal option

· RoHS compliant

Aluminium Housed

Wirewound Resistors

WH Series

•High power dissipation up to 300W

•All welded construction

•Suitable for severe environments

•Designed for excellent thermal conductivity to heatsink

•Spade terminal option

•RoHS compliant

Electrical Data

WH5 WH10 WH25 WH50 Notes

Power rating at 25°Cwatts10 15 25 2 50 1, 2 On standard heatsink

Resistance range ohms 0R01 to 10K 0R01 to 20K 0R01 to 44K 0R015 to 120K

TCR (-55° to 200°C) ppm/°C <10R: ±75 ≥10R to <100R: ±50 ≥100R: ±25

Resistance tolerance % 1(F), 2(G), 5(J) and10(K)

Low value limits ohms 1R at 1% 0R5 at 2% 0R05 at 5% 0R01 at 10% WH50 0R015 at 10%

Isolation voltage volts 1500 1500 3000 3000 DC or AC peak

Note 1: For load at full rating mounton aluminium heatsink 30.5 cm x 30.5 cm x 1.5 mm Note 2: WH25T & WH50T are additionally rated at 15A

CECC 40203-006 Requirements * AA BA CA DA Notes

Power rating at 25°Cwatts10 15 25 40 On standard heatsink

Resistance range ohms 0R05 to 3K4 0R05 to 15K 0R05 to 33K 0R05 to 82K

TCR (-55° to 200°C) ppm/°C ≥5R to ≤10R: ± 100>10R: ±50

Resistance tolerance % 1(F), 2(G), and 5(J)

Low value limits ohms 1R at 1% 0R5 at 2% 0R05 at 5%

Isolation voltage volts 1000 1000 2000 2000 DC or AC peak

* This table indicates the CECC specification requirements which are met or exceeded by the corresponding WH series products.

Limiting element voltage volts 150 250 500 1250 DC or AC rms

Standard values E24 preferred range Other values to order

Thermal impedance °C/watt 16.0 10.0 6.0 3.5 On standard heatsink

Ambient temperature range °C -55 to 200

WH100 WH200 WH300 Notes

Power rating at 25°Cwatts100 200 300 On standard heatsink

Resistance range ohms 0R01 to 70K 0R01 to 50K 0R01 to 68K

TCR (-55° to 200°C) ppm/°C ≤1K0: ±100 >1K0: ±25

Resistance tolerance % Standard 5(J) and 10(K). also available : 1(F) and 2(G)

Low value limits ohms Typically ≥0R05: ±5% ≤0R047: ±10%

Isolation voltage volts 6360 7070 7070 DC or AC peak

Limiting element voltage volts 1900 1900 2500 DC or AC rms

Standard values E24 preferred range Other values to order

Thermal impedance °C/watt 1 0.7 0.6 On standard heatsink

Ambient temperature range °C -55 to 200

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 test data and is considered accurate at time of print.

Welwyn Components Limited

Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com

Aluminium Housed

Wirewound Resistors

WH 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.

07. 12

Aluminium Housed

Wirewound Resistors

Physical Data

Dimensions(mm) & Weight (g)

WH5, 10, 25 & 50

A B C E F G H L M N Dt Wt.

Type Max ±0.3 ±0.3 Min Max Max Dia ±0.2 Max ±0.5 Max Min Nom

WH5 30 12.4 11.3 1.9 17 9 2.4 17.0 4.3 1.8 2.5 3.6

WH10 36.5 15.9 14.3 1.9 21 11 2.4 21.0 5.2 2.2 2.9 5.6

WH25 51 119.8 18.3 2.8 28 15 3.3 29.0 7.2 2.6 4.3 13

WH50 72.5 221.4 39.7 2.8 30 16 3.3 51.0 7.9 2.6 5.1 29

WH100, 200 & 300

Max

±0.3

Max

Nom 3M

Max

Min

Wt.

Nom

WH100 47.5 88 24.1 27.3 65.2 35 37 11.8 15.4 3.7 4.4 - 7.0 115

WH200 72.5 145.7 41.8 45.5 89.7 70 57.2 20.5 10.4 5.5 5.1 103.4 15 475

WH300 72.5 184.4 41.8 45.5 127.7 104 59 20.5 12.4 5.5 6.6 141.4 15 700

Note 1: Amax for WH25T is 71.3 Note 2: Amax for WH50T is 95.5 Note 3: WH100: ±0.25, WH200 & 300: ±0.45

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 test data and is considered accurate at time of print.

Welwyn Components Limited

Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com

Construction

Cap and lead assemblies are fitted to a high purity

ceramic substrate. The resistive element is wound onto

the substrate and welded to the caps. The wound rod is

then moulded and fitted into aluminium housing to give

optimum stability and reliability.

Marking

The resistors are legend marked with type reference,

resistance value and tolerance which will withstand all

accepted industrial cleaning fluids. Values are marked

in accordance with IEC 62

End face tracking distance = Dt

WH100

WH200 &300

WH5

,10,25 &

Spade terminal on

WH25T & WH50T

Nominal dims in mm

Aluminium Housed

Wirewound Resistors

WH 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.

07. 12

Aluminium Housed

Wirewound Resistors

Performance Data

WH5, 10, 25 & 50 WH100, 200 & 300

ActualCECC 40203-006

Requirements Maximum Typical Maximum

Load at commercial rating: 1000hrs at 25°C∆R% 1 1 0.4 2

Load at CECC rating: 1000hrs at 25°C∆R% 1 1 0.4 N/A

Dry heat: 1000hrs at 200°C∆R% 1 1 0.4 2

Derating from 25°C Zero at 200°C, see derating graph

Short-term overload ∆R% 1 1 0.2

Climatic sequence ∆R% 1 1 0.4

Climatic category 55/200/56

Long-term damp heat ∆R% 1 0.5 0.2

Temperature rapid change∆R% 0.25 0.25 0.1 0.25

Resistance to solder heat ∆R% 0.25 0.25 0.05 WH100: 0.5

Vibration and bump ∆R% 0.25 0.25 0.025

Noise (in decade of frequency) µV/V Not specified 0 0 0

Insulation resistance ohms 1G min 10G min

Pulse and overload performance Not specified See graphs

Note: A 0.05 ohmaddition is to be added to the performance of all resistors < 10 ohms.

Application Notes

After soldering, care should be taken toensure that there are no flux residueson the end faces of the moulding

compound, otherwise insulation resistance will be reduced. The minimum surface tracking distances from termination

to casing are shown in the Physical Data tables as dimension Dt.

It is recommended that the resistor base should be coated thinly with heatsink compound before mounting to obtain

the stated operating characteristics. The heatsink compound increases thermal conductivity to the heatsink.

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 test data and is considered accurate at time of print.

Welwyn Components Limited

Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com

0.1 110 100 1000

Overload Duration (s)

Multiple of Rated Power

WH5&10

WH100-300

WH25-300

WH5-50

0.1

100

1000

10000

0.01 0.1 110 100 1000 10000 100000

Value (ohms)

Energy (joules)

WH5

WH10

WH25

WH50

WH100

WH200

WH300

Pulse and Overload Performance

For short durations of ≤0.1s the energy graph should

be used. For longer durations the overload graph

applies.

Terminations

WH5-100

Material Pb-free solder dipped, copper clad steel

Strength The terminations meet the requirements

of IEC 68.2.21

Solderability The terminations meet the requirements

of IEC 115-1, clause 4.17.3.2

WH25T & 50T

6.3

(

¼“)

spade terminal

WH200 &300

Material M6 threaded steel terminal with a

set of fournuts and washers

Strength Termination robustness 50N max

Tightening torque 5Nm max

Aluminium Housed

Wirewound Resistors

WH 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.

07. 12

Aluminium Housed

Wirewound Resistors

The standard aluminium heatsinks are defined in the table below. If smaller heatsinks are used then derating should

be applied as indicated in the graph below. If no heatsink is employed, use the ratings for 1cm2.

Packaging

WH5, 10, 25, 50 &100 resistors are packed in plastic bags and boxed. WH200 & 300 are individually boxed.

Ordering Procedure

Example: WH25 with spade terminals at 100 ohms with a 5% tolerance:

W H 2 5 T – 1 0 0 R J I

Type

Termination

Standard

T Spade terminal

Value (use IEC62 code)

Tolerance (use IEC62 code)

F 1% J 5%

G 2% K 10%

Packing

The following options apply to WH5, 10, 25 & 50 only:

For CECC released product state on order the CECC number and style. Example: WH25-3K3JI CECC40203-006 CA

For SnPb finish instead of Pb-free replace the packing suffix with PB. Example: WH25-3K3JPB

Type (CECC) Thickness (mm) Area (cm²)

WH5 (AA) 1 410

WH10 (BA) 1 410

WH25 (CA) 1 544

WH50 (DA) 1 544

WH50 @ 50W 1.5 930

WH100 3 1000

WH200 3 3800

WH300 3 5800

Reference heatsink dimension

100

1000

1 10 100 1000 10000

Heatsink Surface Area (cm

)

Ma ximum Dissipa tion (W )

WH10/BA 70

°C

WH10/BA 25

°C

WH5/AA 70

°C

WH5/AA 25

°C

WH25/CA 70

°C

WH25/CA 25

°C

DA 70

°C

DA 25

°C

WH50 25

°C

WH100 70

°C

WH100 25

°C

WH200 70°C

WH200 25

°C

WH300 70

°C

WH300 25

°C

1 0 0

1 2 0

0 1 0 0 20 0

A m b ie n t T e m p e ra tu r e (° C )

Proportion of Pr (%)

Derating for reduced heatsink dimensions

Derating for ambient temperature

IWH5, 10, 25, 50 Bulk 10/box Standard

WH100, 200, 300 1/box