Alpha MCTF Series

Alpha MATF/MCTF precision thin film resistor product image

Product Features

Precision thin film resistor (transfer moulded)
Resistance ranges from 200kΩ up to 10MΩ
Tolerances from ±0.01% up to ±0.01% (model dependant)
TCR of 0±1ppm/°C to 0±10ppm/°C (model dependant)
Pin pitch of 35.08±0.25mm
Lead length of 10±3mm
Working temperature range from -65°C up to +175°C

Applications

The MCTF precision thin film resistor series from Alpha Electronics offers a wide resistance range from 200kΩ up to 10MΩ with tight tolerances from ±0.01% up to ±0.1%, all in a small through-hole package with a pin pitch of 3.81 ±0.25mm.

Alpha’s Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements. 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.

Precision thin film resistor (transfer moulded)
Resistance ranges from 200kΩ up to 10MΩ
Tolerances from ±0.01% up to ±0.01% (resistance value dependent)
TCR from ±1ppm/°C up to ±10ppm/°C (resistance value dependent)
Maximum working voltage of 300V
Power rating of 0.2W (at +125°C)
Maximum rated operating temperature +125°C
Working temperature range from -65°C up to +175°C
Pin pitch of 5.08±0.25mm
Lead length of 10±3mm
Transfer moulded through-hole package
Inorganic element coating for moisture resistance

Typical applications for the MCTF precision thin film resistor series include:

Current sense / Voltage divider for precision instrumentation
Automated test equipment
Medical
Electric Scales

Alpha Electronics are a manufacturer of some of the most stable and precise resistors on the market. As part of the VPG group, the Alpha Electronics brand is globally rewarded for the accuracy and reliability of its Bulk Metal® Foil technology resistors. Alpha Electronics has been living the conviction globally known to engineers for consistently delivering the highly desirable characteristics of “Stability, Accuracy and Reliability”. Please visit https://www.alpha-elec.co.jp for more information.

Alpha MCTF Series

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Specifications

Dimensions	2.8 x 8.3 x 7.9mm
Lead Length	25±10mm
Maximum Resistance	10MΩ
Minimum Resistance	200kΩ
Package / Size	Through-hole
Pitch	3.81±0.25mm
Power Rating	0.2W
Product Type	Thin Film, Precision, Transfer Moulded, Resistor
Resistance Value	Custom (200kΩ – 1MΩ)
Series / Model	MxTF
Temperature Coefficient	±1 ppm/°C, ±2.5 ppm/°C, ±5 ppm/°C, ±10 ppm/°C
Temperature Range (°C)	-65 to +175°C
Tolerance	±0.01%, ±0.02%, ±0.05%, ±0.1%

Series / Model (MCTF)

MCTF

Temperature Coefficient (X)

C: ±10 ppm/°C
X: ±5 ppm/°C
Y: ±2.5 ppm/°C
Z: ±1 ppm/°C

Resistance Value (XXXXXX)

Resistance value, in ohm, is expressed by a series of 6 characters, 5 of which represent significant digits. K (kiloohms) or M (megaohms) is a dual-purpose letter that designates both the value range and the location of the decimal point.

Tolerance (X)

A: ±0.05%
B: ±0.1%
Q: ±0.02%
T: ±0.01%

Alpha Resistor Videos

We are pleased to provide you with a range of videos, please see below for the latest content available:

VIDEOS
	Resistor Stability Put to the Test (Demo Video) In this video, our host Richard Zuratt puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.
	Advantages of Using Bulk Metal® Foil Resistors in High-Humidity Environments All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.
	Comparison Testing of Chip Resistor Technologies Under High Vibration Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.

VIDEOS

Resistor Stability Put to the Test (Demo Video)

In this video, our host Richard Zuratt puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.

Advantages of Using Bulk Metal® Foil Resistors in High-Humidity Environments

All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.

Comparison Testing of Chip Resistor Technologies Under High Vibration

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.

VIDEOS

Resistor Stability Put to the Test (Demo Video In this video, our host Richard Zuratt puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.

Advantages of Using Bulk Metal® Foil Resistors in High-Humidity Environments All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.