HTR Resistors

Passive Components > HTR Hi-Tech Resistors

Hi-Tech Resistors (HTR)

htr Since inception in 1988, Hi Tech Resistors Pvt Ltd, popularly known as HTR in the electronics industry worldwide, has grown to become one of the leading resistor manufacturer in the world with presence in 35 countries through a network of representatives and distributors, worldwide. HTR’s state of the art manufacturing facility at Nagpur in India produces over a hundred thousand wire wound and low ohm current sense resistors everyday in a wide variety of mounting and housing configurations. Amongst the very few ISO/TS 16949:2009 certified resistive device manufacturers in the world, HTR has a strong presence in the automotive sector through its range of HVAC and ECS (Electronic Control Systems) resistive devices.

HiTech Resistors / HTR

– Passive Components

HTR produces over a hundred thousand wire wound and low ohm current sense resistors everyday in a wide variety of mounting and housing configurations. HTR resistors are used for office equipment and home appliances such as printers, copying machines and air conditioners. HTR Offers high resistance and small deviation values, HTR products enable reduced set circuit signal inconsistencies and more reliable final products.

Amongst the very few ISO/TS 16949:2009 certified resistive device manufacturers in the world, HTR has a strong presence in the automotive sector through its range of HVAC and ECS (Electronic Control Systems) resistive devices.

HTR is one for the first companies to use the automotive ‘Product Part Approval Process’ methodology for industrial applications in which quality is always ‘built in at source’.

HTR now has the ability to offer economic customised resistive devices for a wide range of applications.
IBS Electronics is an authorized distributor for HTR products, resistors provide both very high-surge power and high sustainable power handling capabilities. IBS Electronics resistor product offering includes standard bulk ceramic resistors, smd/smt & leaded resistors, power resistors, variable resistors, slab resistors, 10 & 16 pad isolated resistors, 8 pin dual terminator resistors, 16, 18 & 24 pin bussed resistors, chip resistors, high speed resistors, axial resistors, tubular resistors and resistor networks. Please contact IBS Electronics today for a quote or to speak with a Sales Representative at 1-800-717-6475.

Characteristics

HTR Wirewound resistors perform great in general usage applications. They have good stability, have a moderate resistance range and are produced in many wattage sizes. Wirewound resistors have been around for a long time. They enjoy a long life because they have some very important features not duplicated by new technology products. Wirewound resistors are generally classified as either power wirewounds or precision wirewounds. The wirewound resistor is usually made by winding insulated resistance wire of a specific diameter around a bobbin. Resistors that tolerate against pulse or surge are required to be used such as; precharge resistors in the circuit where large current is instantaneously applied or, resistors in the circuit where ESD is more likely to be applied. Thick film chip resistors(metal glaze film type) are generally stronger against pulse than metal film chip resistors.

The traditional method of encapsulating resistors through the vitreous enamelled route which was in vogue till about 30 years ago has now been largely replaced with Fire Retardant Silicon/Cement coating.

Further in order to meet the gap in cost between the Silicon/Cement coated Wire Wound resistors and Vitreous Enamelled resistors, some manufacturers of Vitreous enamelled resistors use a low melting temperature enamel which is contra in quality to High Quality Vitreous coating.In addition some vitreous coatings are not RoHS compliant and this must be examined in detail by the component user when their requirements are for RoHS compliance.

Techno/Economic Parameter Silicon/Cement Coating Vitreous Enamelled

 

Moisture Absorption Extremely limited Though in theory, these enamelled coatings are supposed to be moisture proof but in practice due to the nature of production process very often minute hairline cracks are observed, reducing its ability to be moisture proof.
Power to Size Ratio Excellent due to availability of thermally efficient raw materials. Comparable but Higher temperature may be observed.
Tight Tolerances Upto to even 0.05%. Limited to 0.5% at best.
TCR Very low TCR’s as low as 10 ppm/°C are possible. Due to the method of construction it is observed in practice that optimum TCR’s achievable would be at best 50 ppm/°C.
Load Life Extremely Robust due to reduced curing temperature. Some failures are possible due to the fact that the enamel has a melting point in excess of 600°C and during this process there is a possibility of weakening the weld joints due to differences in the thermal coefficients of expansion of the different metals involved.
Flammability Fire Retardant Coatings are available which now UL certified are. It is Flame proof.
Cost Average due to low curing temperature of Silicon/Cement coating. Very High due to large energy cost owing to high melting temperature of Vitreous Enamel.
Extreme Overload Condition Can withstand internal heat generation upto 350°C without significant deterioration of coating Can withstand internal heat generation upto 500°C without significant deterioration of coating, though hairline cracks have been observed.
Emission of Fumes Very limited fumes which are almost Nonexistent in the case of Fire Retardant coating. No Fumes
Production Process (From an Environmental angle) Good Poor due to nature of process.
HTR Product Catalogue 
 Cross Reference Chart
HTR’s Products
  • Categories
  • Wire Wound Resistors
    Wire Wound Resistors
    Silicone Coated Resistors
    Symmetry Resistors
    Ceramic Encased Resistor
  • Current Sense Resistors
    Ceramic Encased Resistor
    Current Sense Open Frame Resistor
  • Surface Mount Resistors
  • Fuse Type Resistors
    Automotive Resistors
    Customised Products
 

  • WIRE WOUND RESISTORS (Silicon Coated)
    • HIA – Axial Industrial grade – MIL Sizes.
    • HTA – Axial, Industrial grade – JSS / IEC Sizes.
    • VHIA – Axial, Industrial grade.
    • HFA – Axial, Commercial, F/Glass Core.
    • HIP – PCB style, Industrial grade.
    • HFP – Plug in style, F/Glass Core.
    • HIR – Lug style, large power dissipation
    • RSR – Lug style, low resistance / high current
    • HSR – Capacitor discharge symmetry resistors.
   HTR Wire wound Resistors - Passive Components Distributor
  • WIRE WOUND RESISTORS (Ceramic Encased)
    • HCA – Axial, Cement type, General Applications.
    • HCV – Vertical, Cement type, Fitted with heatsink mounting bracket.
    • HCW – Axial, Cement type, Industrial Applications, pulse applications.
    • HEA – Axial, Ceramic Square tube style, General application.
    • HSVA – Axial, Ceramic housing with slit.
    • HSVAU – Axial / Vertical dual style ceramic housing with slit.
    • HSV – Vertical, Ceramic Housing with Slit for mounting support.
    • HCP – Horizontal PCB style – Cement type.
    • HCL – Lug terminations, Cement type with bracket.
    • HMV – Flat Vertical mounting, with Ceramic stand – Off.
    • Fusible resistors
   HTR Wire wound Resistors - Passive Components Distributor
  • CURRENT SENSE RESISTORS (Ceramic Encased)
    • RL – Current-Sense Axial Round Ceramic Tube – Low inductance Resistors.
    • HCAL – Axial, Cement type, Low inductance.
    • HEAL – Axial, Ceramic square tube style, Low inductance.
    • HMVL – Flat vertical mounting, low inductance types.
    • BR – Current Sense Resistors: Slim type, Metal Plate, Low inductance type.
   HTR Wire wound Resistors - Passive Components Distributor
  • CURRENT SENSE RESISTORS (Open Frame)
    • OA – Open frame-Axial.
    • OP – Open Frame, PCB style.
   HTR Wire wound Resistors - Passive Components Distributor
  • SURFACE MOUNT RESISTORS (Ceramic Encased)
    • HSVAS – Surface Mount, High Power Wire Wound Ceramic encased.
    • HSVALS – Surface Mount, Current sense Ceramic encased.
    • RLS – Surface Mount, Round ceramic tube, low inductance.
    • HCAS – Surface Mount, Wire wound – 2W & 3W.
    • HCALS – Surface mount, Current Sense type – 2W & 3W.
   HTR Wire wound Resistors - Passive Components Distributor
  • SURFACE MOUNT RESISTORS (Silicon Coated)
    • HIAS – Surface Mount.
   HTR Wire wound Resistors - Passive Components Distributor
  • FUSIBLE RESISTORS (Silicon Coated)
    • FRS – Axial, flame retardant.
   HTR Wire wound Resistors - Passive Components Distributor
  • FUSIBLE RESISTORS (Ceramic Encased)
    • FRC – Cement bath tub fusible type.
    • Resistors of Series K, wound on fiber glass core, have a special internal direct contact to virtually eliminate resistance changes caused by varying, often high temperatures.

Datasheets:

APPLIDES WIRE WOUND RESISTORS
Coated Resistors HIA English
Current Sense Open Frame Resistors OP-English
OFSC Hi-power Current Sense Resistor
HFW FUSIBLE RESISTORS
HSE LOW OHM POWER RESISTORS
HTR India Products Current Sense Resistors Ceramic Encased HCAL-English
LOW OHM/LOW INDUCTANCE HTRLS00049-1
IBS-64 REV-00_110422
Product-Catalogue
HCAS CERAMIC ENCASED TYPE RESISTORS REEL
Silicon Coated Resistors HTA
Power Silicone “Thermo Coat” Wire Wound Resistors TAPING

Automotive Noise suppressor Resistor

Hi-Tech Resistors Pvt Ltd popularly known as HTR worldwide in the Electronic component industry was establish in 1988 with a mission to provide international quality wire wound resistors to the Indian Electronic Industry.

HTR has now transformed itself into a provider of resistive devices for multiple Applications. Equipped with an ISO/TS 16949:2009 qualification HTR provides a cost effective solution to Industries from Automotive to LED lighting to Industrial Applications and apart from wire wound resistors, HTR’s offerings now include low Ohm current sense shunt resistors & special purpose safety fusible resistors which conform to UL 1412.

HTR provides solutions to the Automotive sector through its range of multiple speed Ceramic resistors for HVAC & Engine cooling applications & special purpose punched out and SMD shunts for use in multiple applications such as electronic steering and braking applications, as well as a wide range of applications both for conventional petrol as well as hybrid car or electric vehicles.

HTR exports more than 75% of its production to 43 countries worldwide both directly to its customer and through its network of distributors. HTR main markets are Europe & China with Germany being its biggest single market.

HTR’s Design and QA laboratories are certified to ISO / TS 16949: 2009 to build and test quality at the source. HTR’s products are AEC – Q – 200 Qualified as per the latest Automotive industry standards.

Keeping the LED lighting industry & power supply industry in mind HTR is in a position to provide pulse resistors having the ability to with stand up to 15KV as per IEC 61000-4-5.

HANS

HANS Resistor: Noise Suppressor Resistor For RFI Reduction.

 HANS-S

HANS-S Resistor: HTR Noise suppressor wire wound resistor, Reduces RFI during electrical discharges on petrol engines in cars and in scooters / motorcycles
HANS-C

HANS-C Resistor: HTR Noise suppressor wire wound resistor Reduces RFI during electrical discharges on petrol engines in cars and in scooters / motorcycles

 HANS-F

HANS-F Resistor: HTR Noise suppressor wire wound resistor Reduces RFI during electrical discharges on petrol engines in cars and in scooters / motorcycles.

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