Designed for oil and gas markets, AVX has increased the temperature range of its HTMC series of tantalum capacitors from 125°C to 175°C

By Heather Hamilton, contributing writer

AVX Corp. has
extended the operating temperature range of its TWD High-Temp
Max-Cap (HTMC) Series
of axial-leaded, hermetically sealed
wet tantalum capacitors from 125°C
to 175°C. These capacitors
are designed for use in oil and gas markets that require extreme temperatures,
including use in down-hole drilling equipment. Other applications include DC
hold-up and low-frequency pulse circuitry for avionics, defense, and
specialized industrial thanks to their high capacitance, high operating
temperature, and longer lifetimes than electric double-layer supercapacitors.

The improved capacitors offer the highest
DC capacitance and operating temperature for any T4-case capacitor, according
to AVX. The operating temperature range is –55°C to 175°C. The HTMC capacitors
are available in two ratings (50 mF/6.3V and 25 mF/10V with a ±10% and ±20% capacitance tolerance), offering capacitance values that were
previously only available via supercapacitors.


Key specifications:

  • Operating temperature range of –55°C to 175°C
  • Ratings of 50 mF/6.3 V and 25 mF/10 V
  • Tolerance
    values of ±10% and ±20%
  • RoHS-
    and lead-free-compliant

The capacitors also promise exceptional electrical
and mechanical stability for extended lifetimes of up to 10,000 hours at 105°C
and rated voltage. For the 25-mF/10-V parts, they offer stability up to 2,000
hours at 175°C and de-rated voltage.

The capacitors are available in DSCC size
T4/AVX size E. Options include with or without an insulating sleeve and either
Sn/Pb (60/40) plated or pure matte tin terminations. The case sizes measure
26.97 mm (+0.79 mm or –0.41 mm) in length, 10.31 mm in diameter with an
insulating sleeve or 9.52 mm (±0.41 mm) without the sleeve. Terminals measure
57.15 mm (±6.35 mm). The capacitors are RoHS-compliant, lead-free-compliant,
and can be used in automatic mounting and soldering.

The capacitors are available through AVX’s
distributors: Digi-Key
and Mouser Electronics. Lead time is 12 weeks.