TT Electronics L Series SIL Resistor Network Datasheet

Category: Electronics, Resistors, TT Electronics PLC

Overview and Features

The TT Electronics L Series SIL Resistor Network datasheet details a range of low-profile, thick film SIP conformal coated resistor networks that adhere to RoHS3 compliance as prescribed by EU Directives 2011/65/EU and 2015/863. These networks, consisting of resistors formulated from cermet material on an alumina substrate and encapsulated in conformal epoxy resin, are supplied as lead-free units suitable for an array of electronics applications.

Electrical Specifications

Standard resistance values for this series are available from 22Ω to 1MΩ with a tolerance of ±1%, for values ranging from 10Ω to 5MΩ with a tolerance of ±2%, and 10Ω to 10MΩ with a tolerance of ±5%. Custom resistance values and tolerances (+1% (F Tol) or +5% (J Tol)) are optionally provided. The components operate effectively across a wide temperature range of -55℃ to +125℃, with a power rating per resistor element between 125mW and 200mW at 70℃. Resistance variations due to temperature changes are minimized via a Temperature Coefficient of Resistance specified at ±100ppm/℃ for resistances under 50Ω and ±250ppm/℃ otherwise, with resistance tracking of ±50ppm/℃. The insulation resistance is notably high at 100,000 Megohms, establishing reliable performance even in demanding conditions.

Environmental and Mechanical Endurance

Environmental resilience of the L Series resistor networks is proven through rigorous assessments including thermal shock plus power conditioning resulting in a ΔR of only 0.70%, a low change in resistance even after short-time overload (ΔR 0.25%), and stable physical connections, evidenced by terminal strength tests (ΔR 0.25%). These units also boast strong resistance to moisture, mechanical shocks, vibrations, and extremities of low and high temperatures – demonstrating robustness through variances of ΔR as low as 0.25%. Even after exposure to substantial load for 1,000 hours, the ΔR remains within 1.00%.

Reliability and Compliance

Longevity and durability are further confirmed as the components can withstand a dielectric voltage of 200V for 1 minute and adhere to other reliability standards like MIL-STD-202 for resistance to solder heat and marking permanency. The flammeability is UL-94V-0 rated, denoting optimal fire safety, and backed by compliance with lead solderability protocols.

Construction Features

Construction-wise, the resistor networks feature a SnAgCu lead finish, and are offered in red or black color options. The datasheet provides a detailed list of standard resistance values as well as a power derating curve and configurations for various circuits including 3-circuit isolated resistors and multiple-circuit bussed resistors, detailing code references for ease of product identification and choice.

All specifications carry a caveat of subject to change without notice, affirming TT Electronics’ prerogative for product specification alterations without liability. Storage and operational guidelines indicate suitability across a considerable temperature range of -55℃ to +150℃.

Usage and Application

This datasheet presents essential information for engineers and professionals in electronic design, quality assurance, and procurement departments, allowing them to confidently integrate the L series resistor networks into diverse electronic systems requiring reliable and precise resistance control, with the assurance of environmental resilience and legislative compliance.