Cement Shell and Wire Wound Resistor with 1,000V Withstand Voltage,
Available in Various Size
Quick details
• Temperature Range: -55°C ~ +155°C
• 5% tolerance
• Exceptionally small, sturdy, and reliable
• Sealed with a special cement
• Excellent moisture resistance
• High temperature stability
• Ceramic flame retardant package
• Recommended wash method is alcohol
Application
• Temperature Range: -55°C ~ +155°C
• 5% tolerance
• Exceptionally small, sturdy, and reliable
• Sealed with a special cement
• Excellent moisture resistance
• High temperature stability
• Ceramic flame retardant package
• Recommended wash method is alcohol
Specification
Company Name | JACKCON (HK) INDUSTRIAL LIMITED |
Product Name | Cement Resistors |
1.General 1.1 Scope This specification is available for Cement Resistors manufactured
by JACKCON (HK) INDUSTRIAL LIMITED,it accords with RoHS test of Environment related substance
requirement.
1.2 Type designation (example) The type designation shall be in the following form and as
specified.   CR-(?) 5W 10K J
Type | CR-L | CR-M | CR-YA | CR-YB | CR-YC | CR-YD | CR-YD1 | CR-YE | CR-YG | CR-V |
Rated power | 2W | 3W | 5W | 7W | 10W | 15W | 20W | 30W | 40W |
Nominal resistance value | E-12 Series | E-24 Series |
Resistance tolerance | K | ±10% | J | ±5% | G | ±2% |
1.3 Rated power Rated power is maximum power which can be continuously loaded at
specified ambient temperature 70℃,as Table-1;however when the ambient temperature exceeds
70℃,rated power should be determined from the derating curve of Fig.1.
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www.jackconindustrial.com Email: info@jackconindustrial.com Table-1 Rated power
| Maximum working voltage | Maximum overload voltage | Dielectric withstanding voltage | Max Intermittence Overload Voltage | 1W | 350V | 700V | 1000V | 1500V | 2W | 350V | 700V | 1000V | 1500V | 3W | 500V | 1000V | 1000V | 1500V | 5W | 750V | 1500V | 1000V | 1500V | 7W | 1000V | 1500V | 1000V | 1500V | 10W | 1000V | 1500V | 1000V | 1500V | 15W | 1000V | 15000V | 1000V | 1500V | 20W | 1000V | 1500V | 1000V | 1500V | 30W | 1000V | 1500V | 1000V | 1500V | 40W | 1000V | 1500V | 1000V | 1500V |
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1.4 Rated voltage
The rated voltage shall be the D.C. or A.C.(R.M.S. at power
frequency) voltage which corresponds the rated power and the value of which is calculated from the
formula below.
E=√(P×R) Where E: Rated voltage(V) P: Rated power(W) R: Nominal resistance(Ω)
Operating Temperature Range:-55℃～+250℃
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2. Construction 2.1 External dimensions
The dimensions shall be satisfied with [5. External dimensions]. 2.2 Structure diagram The construction of resistor Cement Type Resistors shall be as
follow:
NO | Item | Material | 1 | Ceramic core | High alumina ceramic is used. | 2 | Resistor element | The resistor element shall consist of metal oxide film or
Resistance wire (Exemple:CN49W Φ1.0mm) . | 3 | Terminal | Tinned iron cap. | 4 | Connection | The lead wire,which is plated with solder,shall be mounted to the
caps by welding process. | 5 | Lead wire t | Soldered or tinned annealed wire. | 6 | Silicon cement | Silicon resin is used. Accord with UL-94V-0 Nonflammable
specification | 7 | Ceramic case | High thermal conductivity |
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3. Characteristics
Table-2 Item | Performance | Test methods(Conform to JIS C 5202) | Temperature Coefficient | Metal Oxide Film:±350PPM/℃ Resistor Wire:±260PPM/℃
| Comply with 5.2
R1-R0/R0(T1-T0)×106(PPM/℃)
R0:Resistance value at room temp.( T0). R1:Resistance value at room temp.plus 100℃ (T1) | Short time overload | Within ±(2%+0.05Ω). No evidence of mechanical damage. | Comply with 5.5
Rated power×10 times,5s But not to exceed maximum overload voltage. (See table-1) | Insulation Resistance | 103MΩ or more. | Comply with 5.6
Resistor shall be tested at DC 500V for 60 seconds. | Dielectric Withstanding Voltage |
No evidence of flashover mechanical damage,arcing or insulation breakdown. | Comply with 5.7 Resistor shall be tested at AC potential respecticely for 60
seconds. (See table-1) | Pulse overload | Within ±(2%+0.05Ω) | Comply with 5.8 Rated voltage X 4 times, 10000 cyc.(1s ON, 25s OFF) But not to exceed maximum pulse voltage. (See table-1) |
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Item | Performance | Test methods(Conform to JIS C 5202) | Resistance to soldering heat | Within ±(1%+0.05Ω) No evidence of mechanical damage. | Comply with 6.4 350±10℃, 3±1s After test leave for 0.5h. | Solderability | Covered with new solder by 95% at least. | Comply with 6.5 Test temperature of solder: 255±5℃ Dipping time in solder:3±1 s | Temperature cycle | Within ±(2%+0.05Ω) No evidence of mechanical damage. | Comply with 7.4 Low side:-55℃/30min, Room temp.:10 to 15min High side:80℃/30min, Room temp.:10 to 15min 5 cycles | Load life in humidity | Within ±(5%+0.05Ω) | Comply with 7.9 40±2℃, 90 to 95%RH, 1000h Rated voltage (90 min ON, 30 min OFF) | Load life | Within ±(5%+0.05Ω) | Comply with 7.10 70±3℃, 1000h Rated voltage (90 min ON, 30 min OFF) |
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4. Indication (1) Rated Power (2) Resistance (3) Tolerance Sample
5. External dimensions 5.1 CR-H type
Unit:mm
Watt | Dimensions(mm) | Resistance Range(Ω) | L1 | L2±1.0 | W3±0.2 | P2 | P3 | t2 | h2 | W1 | W2 | H1 | H2 | 10 | 48±1.5 | 23 | 12 | 6 | 8 | 0.6 | 4 | 9.5±1.0 | 5 | 9.5±1.0 | 6±1.5 | 1-680 | 15 | 48±1.5 | 23 | 12 | 7 | 8 | 0.8 | 4 | 12.5±1.2 | 6 | 12.5±1.2 | 7.5±2.0 | 10-820 | 20 | 63±2.0 | 23 | 12 | 7 | 10 | 0.8 | 4 | 12.5±1.2 | 6 | 12.5±1.2 | 7.5±2.0 | 1-1K | 30 | 75±2.5 | 56 | 18 | 9 | 10 | 0.8 | 4.2 | 19±1.5 | 7.5 | 19±1.5 | 10±2.0 | 1-1K | 40 | 88±2.5 | 68 | 18 | 9 | 10 | 0.8 | 4.2 | 19±1.5 | 7.5 | 19±1.5 | 10±2.0 | 1-1K |
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