Substrates and thick film resistive ink resistors

22 November 2000 Passive Components

Pecos (porcelain enamel coating on steel) is a revolutionary ceramic capability of insulating common steel with a patented ceramic material and process to produce substrates of large sizes and unique shapes. The manufacturer, Ohmite, says the steel core provides the strength and heat dissipation to enable the designer to incorporate structure and circuit in the same component. Typical examples are power resistors and snubber circuits.

The ability to produce large substrates (currently 30,8 by 38 cm) with heat dissipation of 2,33 W per square cm, in free air enables the designer to incorporate many smaller circuits together, with higher density, thus eliminating interconnects, mounting hardware and labour cost.

The ceramic process enables substrates to have through-holes with good dielectric insulation (500 V) to provide two-sided circuits, mechanical assembly and mechanical termination. It does not require the metal form to be flat; however, the circuit area must be flat if screen printing is required.

The resistors feature: wide resistance range (0,25 W-250 kW); low inductance (50 nH at 1 MHz); tight tolerance (1% standard - others available); PCB mountable, other terminations available; 11 different wattage sizes (8-100 W or higher); special shaps and sizes on special order.

Further reading:

SMT flat-wire inductor for automotive electronics
Würth Electronics South Africa Passive Components
Würth Elektronik introduces its new WE-SFIA series of flat-wire inductors in 2010, 2013, and 2016 packages.

Read more...

---

Nanocrystalline cores for cable assembly
Würth Electronics South Africa Passive Components
Conventional MnZn and NiZn ferrite cores for cable assembly are now complemented by nanocrystalline cable cores.

Read more...

---

Heat sinks for power-electronics and IC components
Würth Electronics South Africa Passive Components
Würth Elektronik introduces heat sinks for power-electronics and IC components.

Read more...

---

Cooling solutions for modern electronics
Future Electronics Passive Components
As electronic systems become more compact and powerful, effective thermal management has become a critical aspect of product design.

Read more...

---

DC-link capacitors with ultra-low inductance
Electrocomp Passive Components
TDK Corporation recently released its new series of MKP DC high-frequency film capacitors, a high-performance DC link capacitor platform for next-generation SiC-based power electronics.

Read more...

---

Generating negative voltages from a positive supply
Altron Arrow Editor's Choice Passive Components
It is common for IoT devices, industrial sensors, meters, and medical equipment to require both a positive and negative voltage, and this article explains the options available to produce a negative rail from a positive rail supply.

Read more...

---

High-precision thick-film resistors
Avnet Silica Passive Components
The new Panasonic ERJPC high precision thick-film resistors series deliver accuracy levels previously only achievable with thin film technology, offering customers higher power density and cost-effective performance.

Read more...

---

Semi-shielded power inductors
RS South Africa Passive Components
The SDCx family from Eaton includes the SDCL and SDCH series of semi-shielded power inductors designed for reliable performance in consumer, industrial, energy, and medical applications.

Read more...

---

Compact high-current power inductor
EBV Electrolink Passive Components
Vishay’s IHLP series power inductors deliver high current capability in an ultra-low profile, magnetically shielded design.

Read more...

---

Tiny noise suppression filters
RS South Africa Passive Components
TDK Corporation recently announced its latest noise suppression filters of the MAF0603GWY series, which measure only 0,6 x 0,3 x 0,3 mm.

Read more...

---