Alpha SLD Series

Product Features

Ultra precision, 2 element resistor network
Resistance range 50Ω and 30kΩ
Tolerance from ±0.05% to ±0.1% available
TCR of ±2.5 ppm/°C or ±5 ppm/°C
Power rating of 0.25W (at +70°C)
Temperature range from -25°C to +125°C

Datasheet

Resistance Value Element 1

Resistance Value Element 2

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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) *

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The SLD conformally coated ultra-precision resistor 1-2-3 network series from Alpha Electronics offers a 3 terminal, 2 element resistor network in a small through-hole package. Each resistive element can range from 50Ω up to 30kΩ all with tight tolerances down to +0.05% absolute and +0.02% matching (100Ω to 30kΩ). By utilising Alpha’s Bulk Metal® foil resistor technology, they are able to produce this resistor network series with low temperature coefficients (both absolute and tracking) as well as excellent long-term stability. The Alpha SLD series offers three pins with a standard pin pitch of 2.54 ±0.25mm.

2 element resistor network
Each resistor element is available in any resistance between 50Ω and 30kΩ
Through-hole conformally coated 3 pin package
Tight absolute tolerance of ±0.05% for resistances between 100Ω and 30kΩ with an even tighter matching tolerance of ±0.02% over the same resistance range available
Tight absolute TCR of ±2.5 ppm/°C (from -25°C up to +125°C)
Tight tracking TCR available of between ±0.5 ppm/°C and ±3 ppm/°C depending on resistance ratio between the two elements
Power rating of 0.25W per resistor package (at +70°C)
Maximum rated operating temperature +70°C
Temperature range from -25°C up to +125°C

The SLD through-hole, ultra-precision resistor 1-2-3 network series exhibits excellent high frequency characteristics thanks to Alpha’s Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Alpha’s SLD resistor network series are ideal for use in input and feedback resistors for amplifiers due to both the input and feedback resistors being incorporated into the same package, therefore amplification is not affected by temperature change.

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

* Symbols parenthesized are for part number composition
** Please contact us for resistance availability
TCR is from -25°C to +125°C for SLD Type

Specifications

Weight	0.00000 kg
Dimensions	7.50 x 2.20 x 7.50mm
Maximum Resistance	30kΩ
Minimum Resistance	50Ω
Package / Size	Through-hole, 3 Pin, Conformally Coated
Power Rating	0.25W
Product Type	Network, Ultra-Precision, Resistor
Resistance Value Element 1	Custom (50Ω – 100Ω), Custom (100Ω – 30kΩ), 1kΩ, 2kΩ, 10kΩ, 20kΩ
Resistance Value Element 2	Custom (50Ω – 100Ω), Custom (100Ω – 30kΩ), 1kΩ, 2kΩ, 5kΩ, 10kΩ, 20kΩ
Series / Model	Sx
Temperature Coefficient	±2.5 ppm/°C, ±5 ppm/°C
Temperature Range (°C)	-25 to +125°C
Tolerance	±0.05%, ±0.1%, ±0.5%

Product Variations

SKU	Resistance Value Element 1	Resistance Value Element 2
Alpha SLD1Y 1K000 BA	1kΩ	1kΩ
Alpha SLD1Y 10K00 BA	10kΩ	10kΩ
Alpha SLD1Y 20K00 BA	20kΩ	20kΩ
Alpha SLD1Y 2K000 BA	2kΩ	2kΩ
Alpha SLD1Y 5K000 BA	2kΩ	5kΩ
Alpha SLD2 (50Ω - 100Ω)/(100Ω - 30kΩ)	Custom (50Ω - 100Ω)	Custom (100Ω - 30kΩ)
Alpha SLD2 (100Ω - 30kΩ)/(100Ω - 30kΩ)	Custom (100Ω - 30kΩ)	Custom (100Ω - 30kΩ)
Alpha SLD2 (50Ω - 100Ω)/(50Ω - 100Ω)	Custom (50Ω - 100Ω)	Custom (50Ω - 100Ω)
Alpha SLD2 (100Ω - 30kΩ)/(50Ω - 100Ω)	Custom (100Ω - 30kΩ)	Custom (50Ω - 100Ω)

Sx Series Products

Product name	SKU
Alpha SC Series	Alpha SC Series	View Product
Alpha SE Series	Alpha SE Series	View Product
Alpha SF Series	Alpha SF Series	View Product
Alpha SLD Series	Alpha SLD Series	View Product
Alpha SM Series	Alpha SM Series	View Product
Alpha SS Series	Alpha SS Series	View Product

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.

Resources

Product Datasheet

Alpha SLD & SM Series Datasheet
Alpha Electronics SLD and SM ultra-precision 1-2-3 network resistor series datasheet

Supporting Product Information

Alpha Resistor Networks Additional Information
Alpha Electronics ultra-precision resistor network circuit layouts, number of possible elements per layout and TCR 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
Alpha Electrinics (VPG) PCN External Marking Change
Change of marking on Alpha Ultra Precision Resistor to laser marking from ink marking

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

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Sx Series Products

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