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Welwyn Components designs and manufactures electronic components for customers across defense and aerospace, medical, transportation, energy and industrial electronics markets. Key applications are circuit protection, power and energy management, medical device equipment and signal conditioning. Products include: fixed resistors - current sense, high power, precision, fusible, flameproof, high voltage/value, surge/pulse, general purpose and dividers.
The Technology Showcase brings together TT electronics’ key products within selected vertical markets: medical, defence & aerospace, industrial, transportation and energy. Highlighting their latest and most innovative products, the Showcase helps you to choose the right products to develop your applications.
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Welwyn LRMA Low Resistance Metal Alloy Resistors offer metal element construction, good surge performance, low TCR down to 75ppm/°C, and are AEC-Q200 certified for automotive applications. Specific applications include power supplies, small motor control, medical PSU, and battery chargers.
TT electronics/Welwyn PCF Series Thin Film SMT Resistors are constructed from a thin-film material selectively deposited on a 96% alumina substrate with metallic contacts at each end and supplied with 100% Sn matte plated wrap-around terminations suitable for soldering. The wrap-around terminations supplied to the PCF Series Thin Film Resistor chips from TT electronics/Welwyn have an electroplated nickel barrier and tin coating that ensures excellent "leach" resistance properties and reliable contact to the PCB. These robust resistors can operate at a maximum temperature of 125ºC, and up to 155ºC for higher power grades. PCF Series Thin Film Resistors offer an extended ohmic range from 1R-3M and superior humidity performance at a passivated range.
TT electronics Welwyn WPRT Series Wirewound Resistors feature 10 - 50W power
range, up to 250W overload, quick connect or soldered tags, optional
mounting bracket, and flameproof construction. They are designed as a
high power resistor with high overload rating and optimized
surge energy capacity, and are designed for high power energy
conversion systems in such areas as electric vehicles and motor drives.
Ideal markets for TT Electronics Welwyn WPRT Series Wirewound Resistors include
industrial, automotive, and energy.
TT electronics Welwyn WHS Series Wirewound High Surge Resistors offer the industry’s highest surge energy ratings from 2W to 7W sizes. The WHS2, rated at 2W, is the smallest resistor of its type on the market and provides surge energy ratings of 0.9 to 5.8J. WHS Series Wirewound High Surge Resistors are available rated 3, 5 and 7W, in resistance values up to 330Ω and taking energy ratings up to 60J. Designers have greater flexibility with the additional options of radial, goalpost, lancet and SMD Z-form leads. All the WHS Series Wirewound High Surge Resistors benefit from UL94-V0 flameproof protection and operate over a wide -55º to +155ºC temperature range. Suitable for a wide range of pulse applications, the TT electronics WHS Series
Wirewound High Surge Resistors are flameproof, and are aimed at designers of power supplies requiring a line input resistor for inrush limiting and protection.
Welwyn's RC Series Precision Metal Film Resistors are CECC-released devices with low TCRs over a wide resistance range. Other features of Welwyn's RC Series resistors are resistance tolerance down to 0.05%, low noise and negligible voltage coefficient, and screened parts available for critical applications. Express delivery is available for this product.
The WH Series Aluminum Housed Wirewound Resistors from Welwyn have an all-welded construction and high-power dissipation up to 300W. Welwyn's WH Series wirewound resistors are suitable for severe environments and designed for excellent thermal conductivity to heatsinks. In addition, these resistors offer a spade terminal option and are RoHS compliant.
The HVC Series High-Voltage Chip Resistors from Welwyn offer continuous voltages up to 3kV and overload voltages up to 4kV. In addition, Welwyn's HVC Series high-voltage chip resistors have values up to 100M, tolerances to ±0.5%, ambient temperature range of -55 to +155ºC, and robust thick film construction.
Welwyn's DSC Series Double-Sided Chip Resistors have two parallel resistance elements in a single chip. Other features of the DSC Series chip resistors from Welwyn include excellent pulse withstand performance, operating temperature range of -55 to +155ºC, enhanced working voltage and power rating, and Pb-free terminations. The DSC Series is also laser trimmed up to 0.5% tolerance.
The PWC Series Chip Resistors from Welwyn offer excellent pulse withstand performance and improved working voltage. In addition, Welwyn's PWC Series Chip Resistors have standard chip sizes (0805 to 2512), improved power rating, operating temperature range of -55 to +155ºC, and custom designs available.
Welwyn's W20 Series Wirewound Resistors are CECC approved and offer high stability and reliability. Suitable for harsh environments, the W20 Series resistors from Welwyn have an impervious lead-free vitreous enamel coating. In addition, these resistors feature high-power dissipation for their size and overload characteristics ideal for protection circuits.
The Welwyn ULW Series UL Recognized Wirewound Resistors are fusable resistors with failsafe AC fusing at 120 / 240Vrms, inrush and surge withstanding. With a UL940V0 flameproof coating, the ULW Series offers power ratings of 2W, 3W, 4W, and 5W. The Welwyn ULW Series UL Recognized Wirewound Resistors are available SMD and are RoHS compliant.
Welwyn EMC Series Pulse Withstanding Resistors feature failsafe 240V AC fusing with good pulse handling capability. The flameproof (UL94-V0) metal film resistors are a small size for the 2W power rating. The Welwyn EMC Series Pulse Withstanding Resistors offer a resistance range of 4R7 - 68R Ohms and are UL1412 recognized.