HTA Series

P0WER SILICONE "THERMO COAT" WIRE WOUND RESISTORS 
  • Axial Termination 
  • Flame retardant coating compatible with UL standards 
  • 0.75 W to 12 Watts 
  • Tolerances as close as 2% 
  • R10 to 100 K 
  • TCR as low as ± 60ppm / °C [on request] 
APPLICABLE STANDARDS - JSS- 50402 [Pattern RFHT - 1], IS - 8909 [Type FRP3], IEC - Pub 266 and Pub 266 A [Type - 2E]

Physical configuration

HTR TYPE POWER RATING at 70°C DIMENSIONS (mm) RESISTANCE RANGE  WT. PER PC (gms)
L
(MAX) 		 D
(MAX) 		 d
+0.08/ -0.05		 I
±1.5 		 MIN MAX
H-1B  0.75W 9.0 3.5  0.8 38  R10 2K2 0.6
H-2B 2.5W 13.0 5.5 0.8 38 R10 10K 1.1
H-6 6W 23.0 8.0 0.8 38 R10 33K 3.2
H-9 9W 39.0 8.0 0.8 38 R10 68K 5.4
H-12  12W 54.0 8.0 0.8 38 R10 100K 6.3

NON INDUCTIVE RESISTORS
Low inductance Aryton - Perry winding type resistors are available in this series. For non-inductive types reduce maximum resistance values shown to 50% and the continuous working voltage to 70%.
PRE-FORMED LEADS
The resistor terminations can be bent and cut as per requirements for quick PCB mounting. Please send detailed drawings for the type of preforming required.
TAPING
Types H-1B, H-2B, & H-6 can be supplied in taped form.Please refer Taping Specification
 
 
 
ELECTRICAL DATA

Resistance Tolerances Available
± 10% [K], ± 5% [J], ± 3% [H]
+ 2% [G].
[Test method no. 13.2 of JSS - 50402 and 50400]

Voltage rating
The resistors shall have a rated DC, continuous working voltage or an approximate sine-wave root mean square (rms.) working voltage at commercial line frequency corresponding to the power rating, as determined by the following formula

E = ÖPR 
where,
E = rated DC or rms. continuous working voltage.
P = Power rating in watts.
R = Nominal resistance in ohms.

Rated ambient temperature - 70°C
Full power dissipation at upto 70°C and linearly derated down to zero dissipation at 350°C.
[See derating curve below]

Short time overload
Max..DR ± (2% + 0.05ohms)       Test No.13.19 of JSS - 50402 ansd JSS - 5040
 

Voltage proof - dielectric withstanding voltage
[applicable to insulated styles only]
No breakdown or flashover        [Test No. 13.3.1 of JSS - 50400]

Insulation Resistance
1000M(Dry)                  (Test No. 13.4 of JSS-50402 and JSS -50400
 

 
MECHANICAL SPECIFICATIONS
Pull test
No mechanical damage
[Force applied from 2 to 4.5 Kgs depending on size]		 Solderability
Continuous and satisfactory
[Test method No. 19 of JSS 50101]
ENVIRONMENTAL SPECIFICATIONS
Temperature cycling
Max..DR ± (2% + 0.05ohms).
[Test No.13.14 of JSS - 50402 and JSS - 50400]		 Life (Electrical)
Max..DR ± (5% + 0.05ohms).
[Test No.13.17 of JSS - 50402 and JSS - 50400]
Climatic and damp heat
Max ..DR ± (<5%). No physical damage.
[Test No.13.15 and 13.16 of JSS - 50402 and
JSS - 50400] [Severity H - 13]		 Flammability
Within the specified limits.
[Test No. 10 of JSS - 50101]

NOTE:
1) In case non inductive type is required please prefix HTR type with "N" eg: NH--6

 

Eurocap International Limited.   138 High Street,  Cheshunt,  Herts,  EN8 0AP  England.
Tel    +44 (0)1992 625407      Fax   +44 (0)1992 625420
Email eurocap@dial.pipex.com