TOKEN
GENERAL
PURPOSE
RESISTORS
General Purpose Wire Wound / Fusible Resistors
Token Electronics Industry Co., Ltd
.
Taiwan:
No. 137, Sec. 1, Chung Shin Rd., Wu Ku Hsiang, Taipei Hsien, Taiwan, R.O.C
TEL: 886-2-2981 0109; FAX: 886-2-2988 7487
China:
12F, Zhongxing Industry Bld., Chuangye Rd., Nanshan District, Shenzhen, Guangdong
TEL: 86-755-2605 5363, 2605 5364; FAX: 86-755-2605 5365
http://www.token.com.tw
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Product Index
Information
General Information ----------------------------------------------------------------------------- 01
Terminology & Glossary ----------------------------------------------------------------------- 03
Selecting The Optimum Resistor ----------------------------------------------------------- 05
Wire Wound Resistors
BWW Series - High Precision Wirewound Resistor ---------------------------------- 07
KNP-R Series - Power Precision Wirewound Resistor ------------------------------ 10
KNP-VE Series - Vitreous Enamel Coated Wirewound Resistor ----------------- 13
KNP Series - General Purpose Wirewound Resistor --------------------------------- 16
KNPN Series - Non-Inductive Wirewound Resistor ----------------------------------- 19
Fusible Resistors
FRN Series - Precision Fusible Resistor ------------------------------------------------- 22
FKN Series - Wirewound Fusible Resistor ---------------------------------------------- 22
FSQ Series - Thermal Dissipation Fusible Resistor ---------------------------------- 22
FKU, FRU Series - Cement Resistor with Thermal Cut-offs ------------------------ 26
General Purpose Resistors
PGM Series - Light Dependent / CdS Photoresistor --------------------------------- 29
RCR Series - Pulse Load Anti-Surge Resistor ----------------------------------------- 36
CCR Series - Carbon Composition Resistor ------------------------------------------- 39
MF Series - Precision Resistor -------------------------------------------------------------- 42
RSS, RSN Series - Power Film Resistor -------------------------------------------------- 45
CF Series - General Purpose Carbon Film Resistor --------------------------------- 48
ZO, JW Series - Zero Ohm and Jumper Wire ------------------------------------------- 51
SQ Series - Thermal Dissipation Ceramic Housed Cement Resistor ---------- 54
Notice:
Specification Changed or Version Updated will be posted at irregular intervals.
All Updated and Final Specifications, Please Confirm with TOKEN ELECTRONICS
REPRESENITIVES.
:
:
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TOKEN
Power Resistors General Information
Information of
General Purpose
Resistors
General Purpose Resistors With Customized Service
Token Electronics is expanding business to include a broad range of General Purpose Resistor
products designed for high volume applications. This expanded range of commercial resistor
presents a more comprehensive product offering for Customer Experience Management (CEM)
and other high volume customers that require quality products at competitive pricing.
Backed by the same customer service, technical support and quality assurance that Token has
always provided, these new commercial products enable you the opportunity to source a wider
range of resistors from a trusted supplier.
General Use
When an ambient temperature exceeds a rated ambient temperature, resistor shall be applied on the
derating curve by derating the load power. General purpose resistor under overloads is not combustion
resistant and is likely to emit, flame, gas, smoke, red heat, etc. Flame retardant resistor generally emit
smoke and red heat in a certain power and over but do not emit fire or flame.
When resistors are shielded or coated with resin etc., stress from the storage heat and the resin are
applied. So, performance and reliability should be checked well before use.
When a voltage higher than rated is applied in a short time (single pulse, repeated pulses, surge, etc.),
it does not necessarily ensure safety that an effective wattage is not higher than a rated wattage. Then
consult with us with your specified pulse wave shape. Resistors shall be used in a condition causing
no dew condensation.
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TOKEN
Resistors General Information
Keep temperature from rising by choosing resistor with a higher rated capacity; do not use a
component having the exact load value required. For considerations of safety in extended period
applications, the rating should be more than four times higher than the actual wattage involved,
but never use resistors at less than 25% of its rated power.
In applications where resistors are subject to intermittent current surges and spikes, be sure in
advance that the components selected are capable of withstanding brief durations of increased load.
Do not exceed the recommended rated load. Resistor must used within the rated voltage range to
prevent the shortening of service life and/or failure of the wound resistance elements.
Minimum load: Resistor must be utilized at 1/10 or more of the rated voltage to prevent poor
conductance due to oxidation build-up. For basic particulars for cautions, refer to EIAJ Technical
Report RCR-2121 “Guidance for care note on fixed-resistors”.
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Resistors Glossary Terminology
Glossary Terminology
of General Purpose
Resistors
Fusible Resistor (Fuse Resistor, Circuit Protect Resistor)
A resistor designed to protect a circuit against overload; its resistance limits current flow and thereby
protects against surges when power is first applied to a circuit; its fuse characteristic opens the circuit
when current drain exceeds design limits.
Thermal Cutoff Resistor
The maximum nominal resistance value at which the rated power can be applied continuously without
exceeding the maximum working voltage is the critical resistance value. The rated voltage is equal to
the maximum working voltage in the critical resistance value. If the circuit designs permits, the choice
of a high ohmic value resistor or divider network will eliminate this consideration.
A thermal fuse is a cutoff which uses a one-time fusible link. Unlike the thermostat which automatical-
ly resets itself when the temperature drops, the thermal fuse is more like an electrical fuse: a single-use
device that cannot be reset and must be replaced when it fails or is triggered. A thermal fuse is most
useful when the overheating is a result of a rare occurrence, such as failure requiring repair (which
would also replace the fuse) or replacement at the end of service life.
Token offers “Thermal Cut-off Resistor”, a thermal Cut-offs is a fusible alloy and a resistor is a volt-
age divider, both are surrounded by a ceramic cement with special resin. Under normal operating tem-
peratures the fusible alloy joins the two lead wires within the body of the cutoff and the power resistor
acts as a normal function resistor. When the preset temperature of the cutoff is reached, the fusible
alloy melts and with the aid of the special resin, complete cutoff is ensured.
Thermal fuse resistors are usually found in heat-producing electrical appliances such as coffeemak-
ers and hair dryers. They function as safety devices to disconnect the current to the heating element in
case of a malfunction (such as a defective thermostat) that would otherwise allow the temperature to
rise to dangerous levels, possibly starting a fire.
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