Cement Resistors (SQ)

Ceramic Housed Cement Resistors (SQ) Introduction

Low-cost Ceramic Encased Cement Resistors Suit High Volumes and High Temperatures

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  • Cement Resistors - SQ Series

Token electronics offers commercial grade ceramic-housed power wirewound and film resistors. For medium to high rated power (2W...50W), SQ resistors provide full electrical insulation mounted in a ceramic case.

Axial, radial, vertical styles and several mounting techniques of wire leads or quick disconnects are available from Token's SQP, SQM, SQZ, and SQH.

The SQ series power resistors feature ideal specifications for high volume and high-temperature applications. Frequently used in power supplies, motor controllers, and automotive applications, these products can be custom tailored to individual needs.

With the extended resistance range and high-temperature rating, the resistors can be specified for operation in harsh environments. The SQ series wirewound resistors feature a resistance range from 0.1Ω to 3KΩ, while the SQ series power film resistors have a resistance range of 80Ω to 150KΩ.

Standard tolerances for both devices are to ±5%, with TCRs of ±300ppm/°C and above. Token is equipped to design and produce custom components to meet many design and reliability demands. Contact us with your specific needs.

Download complete (SQ) specification - Ceramic Encased Cement Resistors.

Features :
  1. Low cost, space saving, RoHS compliant with 100% lead free.
  2. Direct mounting on printed circuit board, Circuit board lock-in mounting tabs available.
  3. High performance for power required applications. High power to size ratio, Special inorganic potting compound.
  4. Ceramic case provide high thermal conductivity in a fireproof package.
Applications :
  1. Power supplies, Voltage dividers, Motor controllers, Automotive applications,
  2. Power electronics circuits.

Dimensions (SQP)

Cement Ceramic Housed (SQP) Dimensions
Cement Ceramic Housed (SQP) Dimensions
Type Dimension (mm) Resistance Range (Ω)
SQP W±1 H±1 L±1.5 d±0.05 SQP RS+SQP
2W 7 7 18 0.5~0.6 0.1~82
3W 8 8 22 0.7~0.8 0.1~180 181~33K
5W 10 9 22 0.7~0.8 0.1~180 181~50K
7W 10 9 35 0.7~0.8 0.1~430 431~50K
10W 10 9 48 0.7~0.8 0.1~470 471~50K
15W 12.5 11.5 48 0.7~0.8 0.5~600 601~150K
20W-25W 14 13.5 60 0.7~0.8 0.8~1K 1.1~150K

Dimensions (SQM)

Ceramic Housed (SQM) Dimensions
Ceramic Housed (SQM) Dimensions
Type Dimension (mm) Resistance Range (Ω)
SQM H±1.5 W±1 S±1 SQM RS+SQM
2W 20 12 8 0.1-8.0 81-50K
3W 25 12 8 0.1-180 181-50K
5W 25 13 9 0.1-180 181-50K
7W 39 13 9 0.1-430 431-47K
10W 51 13 12 0.1-470 471-47K
10WS 35 16 12 0.1-430 431-47K

Dimensions (SQT)

Cement Ceramic Encased (SQT) Dimensions
Cement Ceramic Encased (SQT) Dimensions
Type Dimension (mm) Resistance Range (Ω)
SQT H±1.5 W±1 L±1 t±1 SQT RS+SQM
3W 9 10 22 1.5 0.1-180 181-50K
5W 9 10 22 1.5 0.1-180 181-50K
7W 9 10 35 3.0 0.1-430 431-47K
10W 9 10 48 3.0 0.1-470 471-47K

Dimensions (SQH)

Cement Ceramic Encased (SQH) Dimensions
Cement Ceramic Encased (SQH) Dimensions
Type Dimension (mm) Resistance Range (Ω) Max
Working
Voltage
SQH W±1 H±1 L±1.5 P±1 H1±1 D±0.5 P1±0.2 P2±0.2 SQH RS+SQH
10W 10 9 48 32 21 5 2.5 2 0.1~500 500~50K 500V
15W 12.5 11.5 48 32 21 5 2.5 2 1~1K 1K~150K 600V
20W 14.5 13.5 60 43 24 6 3.0 2.5 1~2K 2K~150K 700V
30W 19 19 75 56 29 6 3.0 2.5 1~2K   700V
40W 19 19 90 67 29 6 3.0 2.5 2~3K   700V
50W 19 19 90 67 29 6 3.0 2.5 2~3K   700V

Dimensions (SQZ)

Cement Ceramic Encased (SQZ) Dimensions
Cement Ceramic Encased (SQZ) Dimensions
Type Dimension (mm) Resistance Range (Ω)
SQZ L±1.5 W±1 H±1 P±1.5 P1 P2 P3 P4 H1±1 H2±1 SQZ RS+SQZ
5W 25(28) 10 10 9.5(15) 4.2 2 5 1.5 25 10.5 0.1-130 131-50K
7W 36 10 10 20 4.2 2 5 1.5 25 10.5 0.1-430 431-50K
10W 48 10 10 32 4.2 2 5 1.5 25 10.5 0.2-470 471-50K
15W 48 12.5 12 32 4.2 2 5 1.5 26 10.5 1-600 601-150K
20.25W 60 15 13 42 7 6 10 2.7 36 15.0 1-1K 1.1K-150K

Electrical Performance (SQ)

TEST ITEMS CONDITION SPEC.
Resistance Temp Coeff. -30°C~ 200°C ±300ppm / °C
Short Time Over Load 2.5 times of rated wattage for 5 sec. ±2 %
Rated Load Rated wattage for 30 min. ±1 %
Voltage Withstanding 800 v AC 1 min. no charge
Temp. Cycle -30°C~ 85°Cfor 5 cycles ±1 %
Load Life 70°Con-off cycle 1000hrs. ±5 %
Moisture-proof Load Life 40°C95% RH on-off cycle 500 hrs. ±5 %
Incombustibility 16 times of rated wattage for 5 min. not flammed

Material Specifications (SQ)


  1. Core :
    High purity grade alumina ceramic rod.

  2. Terminals :
    Tin/lead plated (Lead (Pb)-free will be 100 % tin).

  3. Body :
    Steatite ceramic case with inorganic potting compound.

  4. Element :
    Copper-nickel alloy, nickel-chrome alloy, resistive wirewound or power film depending on resistance value.

Order Codes (SQ)

SQP 5W 100R J Bulk
Part Number
SQP
SQM
SQT
SQH
SQZ
Rated Power (W)
Resistance Value (Ω)
0R1 0.1Ω
100R 100Ω
1K 1KΩ
100K 100KΩ
Resistance Tolerance (%)
J ±5%
Package