Alpha MQP Series

Product Features

Ultra-precision surface-mountresistor
Resistance range from 30Ω to 40kΩ
Tolerance as low as ±0.01%
TCR of ±0.2 ppm/°C
Maximum working current of 0.35A
Power rating of 0.25W (at +70°C)
Temperature range from -65°C to +175°C

Applications

The MQP Z-foil resistor series from Alpha Electronics offers ultra high-precision including a TCR of ±0.2 ppm/°C (typical) as well as a wide resistance range from 30Ω up to 40kΩ, all in a small surface-mount package. By utilising Alpha’s Z-foil resistor technology, they are able to produce resistors with a temperature coefficient of almost zero and excellent long-term stability. Expanding on the standard Alpha MQ series, the MQP series offers double the power rating at +70°C and the same power rating up to +125°C. The J-lead terminals provide flexibility compared to standard fixed surface-mount resistors as the resistive element internally is mechanically isolated from the leads via gold wire-bonding.

Surface-mount ultra-precision resistor
Available in any resistance between 30Ω and 40kΩ
Surface-mount moulded package with J-lead terminations
The resistive element is mechanically isolated from the contact terminals
Tight tolerance of ±0.05% for resistances between 100Ω and 40kΩ
Tight TCR of ±0.2 ppm/°C (typical) thanks to Alpha’s Z-foil technology.
Maximum working voltage of 100V
Maximum working current of 0.35A
Power rating of 0.25W (at +70°C)
Maximum rated operating temperature +125°C
Temperature range from -65°C up to +175°C

Alpha’s MQP surface-mount, ultra high-precision resistor series exhibit excellent high frequency characteristics thanks to their new generation Z-foil technology, making them suitable for the most demanding precision applications.

These resistors are constructed using an outer coating of epoxy resin, which provides excellent resistance to moisture, heat and solvents. Internally, the resistive element is mechanically isolated from the lead frames using gold wire-bonding.

The below table gives the full specifications for each resistor model available including the Alpha MQP series:

* Please contact us for tighter tolerances

Alpha MQP Series

Resistance Value
Temperature Coefficient
Tolerance
Clear

Custom resistance value (Ω) *
Custom AT Range (AT) *
Custom Capacity (lbs) *
Custom Pressure (Bar/PSI) *
Custom Resistance Value Element 1 (Ω) *
Custom Resistance Value Element 2 (Ω) *
Custom lead length (mm) *
Custom lead length (inches) *

Quantity

Add to Compare

Calculators and Convertors

Work out what you need for your project. Go to calculators and convertors

Specifications

Weight	0.00000 kg
Dimensions	2.00 x 3.20 x 4.50mm
Current Rating	0.35A
Maximum Resistance	40kΩ
Minimum Resistance	30Ω
Package / Size	Surface-mount
Power Rating	0.125W, 0.25W
Product Type	Ultra-Precision Surface-Mount Resistor
Resistance Value	Custom (30Ω – 50Ω), Custom (50Ω – 100Ω), Custom (100Ω – 1kΩ), Custom (1kΩ – 40kΩ)
Series / Model	Mx
Temperature Coefficient	±0.2 ±1.8 ppm/°C, ±0.2 ±2.8 ppm/°C, ±0.2 ±3.8 ppm/°C
Temperature Range (°C)	-65 to +175°C
Tolerance	±0.01%, ±0.02%, ±0.05%, ±0.1%
Voltage Rating	100V

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.

Alpha MQP Series Resources

Product Datasheet

Alpha MPP & MQP Series Datasheet
Alpha Electronics MPP and MQP Z-foil moulded J-lead surface-mount ultra high precision resistor series datasheet

Supporting Product Information

Alpha Manufacturing and Product Information
Alpha Electronics manufacturing process, adjustment of resistance value construction, and temperature characteristics of resistance information
Alpha Custom Resistor Products Information
Alpha Electronics additional services and custom ultra-precision resistor information

Supporting Manufacturer Information

Alpha Standard Resistors Databook
Alpha Electronics complete standard resistor series information databook
Alpha Ultra-Precision Resistors Databook
Alpha Electronics complete ultra-precision resistor series information databook