This document describes fusible resistors that are designed to fuse or blow if subjected to abnormal voltage/current spikes or circuit malfunctions. It provides details on product specifications, performance testing requirements, applications, ordering information, and precautions. Fusible resistors function normally as resistors but act as fuses during overloads/faults to provide safety. The document recommends testing any fusible resistor's suitability for the specific application before bulk ordering.
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: UL 1412 approved, Safety fusing at 110/120 V. This products is consumable for Consumer, Telecommunication and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hfw/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: UL 1412 approved, Safety fusing at 220/240 V, Tailor made fusing options available. This products is consumable for Consumer, Telecommunication and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/frs/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: Fiber glass core, UL approved flame retardant coating. This products is consumable for Low cost solution for Consumer Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hfa/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: Ceramic core, PCB pluggable style, UL approved flame retardant coating. This products is consumable for Commercial and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hip/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: UL 1412 approved, Safety fusing at 110/120 V. This products is consumable for Consumer, Telecommunication and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hfw/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: UL 1412 approved, Safety fusing at 220/240 V, Tailor made fusing options available. This products is consumable for Consumer, Telecommunication and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/frs/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: Fiber glass core, UL approved flame retardant coating. This products is consumable for Low cost solution for Consumer Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hfa/
This product is a type of Silicone Coated Resistors, which is a type of Wire Wound Resistors. Features of this product are: Ceramic core, PCB pluggable style, UL approved flame retardant coating. This products is consumable for Commercial and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hip/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: High stability vertical mounting bracket available, Fibre glass and ceramic core available, Ceramic encased for high degree of insulation and low surface temperature, Impulse types available, Non inductive type available. This products is consumable for Industrial and Consumer Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hcv-bracket/
This product is a type of Symmetry Resistors, which is a type of Wire Wound Resistors. Features of this product are: Wire wound symmetry resistors, UL approved flame retardant coating, Stainless steel terminals. This products is consumable for Capacitor Charging and Discharging Resistors.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsr/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Choice of fibre glass or ceramic core, Choice of mounting pillars for additional stability, Non inductive type available. This products is consumable for Space saving, Vertical Mounting Resistors, Consumer and Industrial applications.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsv/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Fibre glass & ceramic core available, Ceramic encased for high power dissipation, Radial terminations for Amp 187 & Amp 250 connectors available, Available with mounting bracket which also serves as heat sink. This products is consumable for Commercial and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hcl/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Choice of fibre glass or ceramic core, Dual purpose HSVAU series is an useful inventory reducer for broad line distributor. This products is consumable for Both axial and space saving, Vertical Mounting Resistors, Consumer and Industrial applications.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsvau/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: High stability vertical mounting bracket available, Fibre glass and ceramic core available, Ceramic encased for high degree of insulation and low surface temperature, Impulse types available, Non inductive type available. This products is consumable for Industrial and Consumer Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hcv-bracket/
This product is a type of Symmetry Resistors, which is a type of Wire Wound Resistors. Features of this product are: Wire wound symmetry resistors, UL approved flame retardant coating, Stainless steel terminals. This products is consumable for Capacitor Charging and Discharging Resistors.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsr/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Choice of fibre glass or ceramic core, Choice of mounting pillars for additional stability, Non inductive type available. This products is consumable for Space saving, Vertical Mounting Resistors, Consumer and Industrial applications.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsv/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Fibre glass & ceramic core available, Ceramic encased for high power dissipation, Radial terminations for Amp 187 & Amp 250 connectors available, Available with mounting bracket which also serves as heat sink. This products is consumable for Commercial and Industrial Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hcl/
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Choice of fibre glass or ceramic core, Dual purpose HSVAU series is an useful inventory reducer for broad line distributor. This products is consumable for Both axial and space saving, Vertical Mounting Resistors, Consumer and Industrial applications.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hsvau/
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
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https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
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DevOps and Testing slides at DASA ConnectKari Kakkonen
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Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
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1. All Welded Cap
And Lead Assembly
In order to meet the growing
demand worldwide for resistors
to fuse or blow as a safety mea-
sure, HTR can provide fusible
resistors which fuse or blow if
they are subjected to an abnor-
mal spike of voltage / current or
in the event of malfunction of
the circuit.
UL RECOGNIZED
As per UL 1412 Fusing Resistors and Temperature-Limited Resistors
UL file # E 342534
Alloy Resistance Wire, Wound
to Specific
Parameters On High
Thermal Conductivity
Ceramic Core
UL approved
Flame Retardant
Thermocoat
FUSIBLE RESISTORS
SILICONE / CEMENT COATED
FRS
SERIES
FUSIBLE RESISTORS
• Flame Retardant Silicone Coated
•Safety Version Available
• 1W to 5W
• 10R to 100R
e : info@htr-india.com
www.htr-india.com
Rev Date : 04/01/2022
AEC-Q200Qualified
2. HTR
TYPE
POWER
RATING
at 40°C
(Ambient)
*
L
(max)
D
(max)
DIMENSIONS (mm) RESISTANCE
RANGE
TYPICAL
WEIGHT
PER PC
(gms)
min max
l
±1.5
d
±0.05
* Coating overflow on each lead not to exceed half of‘D’.
• Resistance values below the minimum range can be supplied on request.
+ Certified to UL 1412
A-1F*/ A1FS* 1W 6.75 4.50 38 0.6 10R 100R 0.60
H-1F*/ H1FS* 1W 9.5 4.5 38 0.8 10R 100R 0.7
A-2F* / A-2FS*+
2W 9.2 3.6 38 0.8 10R 100R 0.55
H-2F* / H-2FS* 2W 11.5 4.5 38 0.8 10R 100R 0.75
D-2F* / D-2FS* 2W (700
C) 14.5 6.0 38 0.8 10R 100R 1.2
H-3AF* / H-3AFS*+
3W 11.5 5.5 38 0.8 10R 100R 1.1
H-3F* / H-3FS* 3W 15.5 6.0 38 0.8 10R 100R 1.4
H-4F* / H-4FS*+
4W 16.0 6.0 38 0.8 10R 100R 1.4
5ACF* / 5ACFS*+
5W 16.8 7.5 38 0.8 10R 100R 1.8
A-5F* / A-5FS* 5W 15.7 5.9 38 0.8 10R 100R 1.35
PHYSICAL CONFIGURATION FUSIBLE
RESISTORS
SILICONE /
CEMENT
COATED
FRS
Power Rating (Rated Ambient Temperature) Full Power dissipation at 40°C and linearly derated
to zero at +350°C - Refer Derating Curve above
Resistance Tolerances Available ±10% (K); ±5% (J); ±3% (H); ±2%(G); ±1% (F)
Temperature Range -55°C to +350°C with suitable derating as per derating curve.
Voltage Rating / Limiting Voltage / Max. Working Voltage V= PxR
Dielectric Withstanding Voltage / Voltage Proof ∆R ± (1% + R05) - No flashover, mechanical
(based on limiting voltage x 2 for 60 secs) damage, arcing or insulation breakdown
Short Time Overload (5 x Rated Power for 5 secs) ∆R ± (2% + R05)
Temperature Co-efficient of Resistance ±60 ppm /°C for <10R - Average
± 90 ppm /°C or ± 30 ppm /°C for >10R depending on wire selected
Insulation Resistance >1000MΩ (Min)
Temperature Cycling ∆R ± [2% + R05]
(Room temperature -55°C Room Temperature
200°C Room Temperature for 5 cycles)
Damp Heat (Steady State) ∆R ± [≤5% + R05] - Average
(40°C at 93% R.H for 1000 hours - no load applicable)
Endurance - Load Life ∆R ± [≤5% + R05 ] - Average
(70°C with limiting voltage - 1.5 hours on /
0.5 hours off for 1000 hours)
Solvent Resistance No effect on coating / marking
(IPA for 60 secs ±10 secs )
PARAMETER/PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS
ELECTRICAL AND ENVIRONMENTAL
CHARACTERISTICS / DATA
e : info@htr-india.com
www.htr-india.com
Rev Date : 04/01/2022
3. MECHANICAL SPECIFICATIONS
Terminal Tensile Strength 50 Newtons
Resistance To Soldering Heat (260°C - 270°C for 10 secs) ∆R ± [0.5% + R05] - Typical
Solderability (As per IEC pub. 60068 - 2 - 20 Ta) Must meet the requirements laid down
Marking As per IEC Pub. 60062
PARAMETER/PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS
As mentioned previously, a fusible resistor is a tailormade dual purpose component –
a. In normal conditions it functions as a resistor.
b. In high overload / fault conditions it acts as a fuse / safety device.
TYPICAL APPLICATIONS
Note : Contrary to popular belief, fusible resistors are not standard resistor types and each type of fusible resistor must be tailor designed
to suit a particular application.
FUSIBLE
RESISTORS
SILICONE /
CEMENT
COATED
FRS
FOR EXAMPLE
1. For Tape & Ammo packing - H2F*T / H2FS*T
2. For Tape & Reel - H2F*TR / H2FS*TR
ORDERING INFORMATION
Series Type Packing Resistance Value Tolerance
FRS H2F*/ H2FS* Bulk H2F*/ H2FS* 15R K
Tape & Ammo H2F*T / H2FS*T
Tape & Reel H2F*TR / H2FS*TR
ORDERING INFORMATION
AT HTR, A SPECIAL“SAFETY VERSION”IS AVAILABLE IN FRS SERIES FOR RESISTANCE VALUES ≥10R
WHERE THE RESISTOR WILL FUSE INSTANTANEOUSLY WHEN MAINS VOLTAGE 220 / 240V IS APPLIED WITH NO FLAME OR EXPLOSION. THE
SAFETY VERSION OF THIS TYPE IS DENOTED BY ALPHABET‘S’AFTER THE NAME OF THE SERIES e.g. for the type H-1F, the safety version will
be termed as H-1FS.
For resistance values <10R the fusing timing and suitability must be tested for each individual application.
Precautions to be taken : Before conducting this test, the voltage must be correctly set / adjusted by first using a dummy piece which
should then be discarded.
NOTE: THE CUSTOMER IS STRONGLY ADVISED TO ASCERTAIN THE SUITABILITY OF THE RESISTOR FOR HIS
PARTICULAR APPLICATION BEFORE ORDERING IN BULK.
e : info@htr-india.com
www.htr-india.com
Rev Date : 04/01/2022