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V1.0

05/01/21

Cement Fixed Resistors

Axial Leaded

Newark.com/multicomp-pro

Farnell.com/multicomp-pro

Element14.com/multicomp-pro

Construction

Cement: Wire Wound Type

Cement: Power Film Type

List of Material

No. Subpart Name

Material

Material Generic Name

1

Body

Rod Type Ceramics

Al2O3, SiO2

2

End Cap

Tin plated iron surface

Tin: 5%, Iron: 95%

3

Lead

Annealed copper wire

Tin-Plated Copper wire

4

Ceramic Case

Ceramic

Al2O3, SiO2

5

Resistance wire

Resistance film

Cu-Ni Alloy / Ni-Cr Alloy

Metal Oxide Film

Cu-Ni Alloy / Ni-Cr Alloy

Metal Oxide Film

6

Filling Materials

Quartz mixed sand

SiO2

Characteristic

Characteristics

Limits

Test Methods

(JIS C 5201-1)

Dielectric withstanding

voltage

No evidence of flashover, mechanical

damage, arcing or insulation break down

Resistors shall be clamped in the trough of a 90°

metallic V-block and shall be tested at AC potential

respectively for 60 +10/ -0 secs.

Temperature coefficient

﹤20Ω: ± 400 PPM/°C

≥ 20Ω: ± 350 PPM/°C

Natural resistance change per temp.

degree centigrade.

R2-R1

× 106 (PPM/°C)

R1(t2-t1)

R1: Resistance value at room temperature (t1)

R2: Resistance value at room temp. plus 100°C (t2)

Short time overload

Resistance change rate is ±(5% + 0.05Ω)

Max. with no evidence of mechanical

damage

Permanent resistance change after the application of

a potential of 2.5 times RCWV for 5 seconds

Terminal strength

No evidence of mechanical damage

Direct load:

Resistance to a 2.5 kgs direct load for 10 secs. in the

direction of the longitudinal axis of the terminal leads

Twist test:

Terminal leads shall be bent through 90° at a point

of about 6mm from the body of the resistor and shall

be rotated through 360° about the original axis of the

bent terminal in alternating direction for a total of 3

rotations