EN 140401-804:2011/A2:2019

Overview

EN 140401-804:2011/A2:2019 is a CENELEC amendment to the European detail specification for fixed low power film high stability SMD resistors (rectangular) in stability classes 0,1 and 0,25. Published May 2019, this amendment (A2) clarifies dimensional requirements in Table 1 to resolve conflicts between the original document and real products. The standard is intended for precision, low-dissipation surface-mount resistors and is maintained by CLC/TC 40XB “Resistors”.

Key topics and technical requirements

• Product family: Fixed low-power film, high-stability SMD resistors, rectangular body style.
• Stability classes: 0.1 and 0.25, indicating high precision/low drift performance categories.
• Dimensional specification: Amendment A2 updates the metric/imperial dimensional limits (length, width, height), termination and maximum mass for several common rectangular styles. Modified values include:
  • RR1005M (RR0402): L 0.95–1.05 mm, W 0.45–0.55 mm, H 0.35–0.50 mm, Termination 0.05/0.1–0.35 mm, Mass ≤ 0.8 mg
  • RR1608M (RR0603): L 1.50–1.70 mm, W 0.70–0.90 mm, H 0.35–0.55 mm, Termination 0.10–0.50 mm, Mass ≤ 2.1 mg
  • RR2012M (RR0805): L 1.80–2.10 mm, W 1.10–1.40 mm, H 0.35–0.60 mm, Termination 0.15–0.60 mm, Mass ≤ 6.0 mg
  • RR3216M (RR1206): L 3.00–3.40 mm, W 1.45–1.75 mm, H 0.35–0.65 mm, Termination 0.25–0.75 mm, Mass ≤ 10.0 mg
  • RR5025M (RR2010): L 4.80–5.20 mm, W 2.30–2.70 mm, H 0.35–0.75 mm, Termination 0.35–0.85 mm, Mass ≤ 30.0 mg
• Regulatory implementation: National adoption deadlines and withdrawal dates are specified by CENELEC (implementation date and conflicting standards removal).
• Administrative notes: The amendment warns that some elements may be subject to patent rights.

Applications and who uses this standard

• Component manufacturers: to design and qualify rectangular high-stability SMD resistors that conform to European dimensions and stability classes.
• PCB designers and electronic system engineers: for specifying precision resistors in low-power, high-accuracy circuits (e.g., precision instrumentation, metrology, telecom).
• Procurement and quality teams: to verify component dimensional conformity, mass, and termination requirements before purchase and assembly.
• Test and calibration labs: for acceptance testing and verifying stability class performance against specified geometries.

Related standards

• Managed by CLC/TC 40XB (“Resistors”); consult CENELEC member national committees for up-to-date cross-references and translations. Note that the amendment A2 modifies EN 140401-804:2011 and should be used together with the base document.