The MA ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 1Ω up to 200kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha’s Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.
Ultra-precision transfer moulded resistor
Available in any resistance between 1Ω and 200kΩ
Through-hole package with a pin pitch of 3.81 ±0.25mm
Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 200kΩ
Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω up to 200kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω up to 200kΩ)
Maximum working voltage of 300V
Power rating of 0.3W (at +125°C) or 0.2W (at 150kΩ or above)
Maximum rated operating temperature +125°C
Temperature range from -65°C up to +175°C
Alpha’s Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.
These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.
The below table gives the full specifications for each resistor model available including the Alpha MA series:
* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C
Alpha Manufacturing and Product Information
Alpha Electronics manufacturing process, adjustment of resistance value construction, and temperature characteristics of resistance information
Ultra-precision transfer moulded resistor,
Resistance range form 1Ω to 200kΩ,
Tolerance from ±0.005% to ±1%,
TCR from ±1 ppm/°C to ±15 ppm/°C,
Power rating of 0.3W (at 125°C),
Temperature range from -65°C up to +175°C.
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