VFR FRSM1206 Series

Product Features

Ultra high precision FRSM wrap-around chip resistor
1206 package size
Voltage rating of 87V
Excellent stability, noise and ESD withstanding properties
Non-inductive: 0.08µH
Available with lead(Pb) free or tin/lead alloy terminations

Applications

The FRSM ultra high precision resistor series from VFR offers a resistance range between 5Ω and 25kΩ, all in a small 1206 surface-mount package with wrap-around terminations. These resistors utilise VFR’s newest Z-1 Bulk Metal® foil resistor technology for improved load life stability (up to 25ppm) and higher working temperatures (balanced temperature characteristics over a range from -55°C to more than 175°C). They have nominal temperature coefficients of resistance of ±0.05ppm/°C typical between 0°C to +60°C and ±0.2ppm/°C typical between -55°C to +125°C (+25°C reference) with tolerances available down to ±0.01% between 250Ω and 25kΩ.

Ultra high precision wrap-around bulk foil chip resistor
Available in any resistance between 5Ω and 25kΩ
1206 package
Tolerances as low as ±0.01% over the resistance range of 250Ω up to 25kΩ
TCR as low as ±0.2ppm/°C between -55° and +125°C, +25°C ref.
Voltage rating 87V
Power rating of 0.3W at +70°C
Load life stability of 25ppm typical at 70°C, 2000h at rated power (50 ppm typical at 70°C, 10000h at rated power)
Thermal stabilization time <1s (nominal value achieved within 10ppm of steady state value)
Electrostatic discharge (EDS) of at least to 25kV
Short time overload of ≤0.005% typical
Rise time as low as 1ns, effectively no ringing
Current noise of <0.010µV_RMS/V of applied voltage (<-40dB)
Non-hot spot design
Terminal finishes available: lead (Pb) free, tin/lead alloy

The FRSM Z1 ultra high precision resistor series is also available as EEE-INST-002 compliant for space use. Please see the separate FRSM EEE (space qualified) product pages for further information.

Non-standard technical requirements such as resistance outside of standard range, lower tolerance or TCR are available upon request. Please contact us for further information and availability.

The below table gives full specifications for each resistor model available including the FRSM1206 series:

⁽¹⁾ For tighter TCR and/or resistance values up to 150k, please contact Application Engineering.

VFR FRSM1206 Series

Packaging
Resistance Value
Termination / Connection
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

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Calculators and Convertors

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Specifications

Weight	0.01100 kg
Dimensions	0.64 x 1.57 x 3.20mm
Maximum Resistance	25kΩ
Minimum Resistance	5Ω
Package / Size	Surface-mount
Packaging	Tape & Reel, Waffle Pack
Power Rating	0.3W
Resistance Value	Custom (5Ω – 10Ω), Custom (10Ω – 25Ω), Custom (25Ω – 50Ω), Custom (50Ω – 100Ω), Custom (100Ω – 250Ω), Custom (250Ω – 25kΩ)
Series / Model	FRSM
Temperature Coefficient	±0.05 ppm/°C, ±0.2 ppm/°C
Termination / Connection	Pb (Lead) free, Standard
Tolerance	±0.01%, ±0.02%, ±0.05%, ±0.1%, ±0.25%, ±0.5%, ±1%

VFR Video Library

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

VIDEOS
	Bulk Metal® Foil Resistors Bulk Metal® Foil resistors, developed by Dr. Felix Zandman in 1962, are the gold standard for the electronic industry. With essentially zero TCR, zero PCR and extremely robust construction, they are the logical choice for all applications requiring unquestioned reliability and stability.
	Resistor Stability Put to the Test (Demo Video) In this video, host Richard Zuratt from VPG 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.
	A head to head comparison of the survival rates of precision thin film nichrome (NiCr) resistors versus VFR Bulk Metal Foil resistors in a high humidity environment. 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.

VIDEOS

Bulk Metal® Foil Resistors

Bulk Metal® Foil resistors, developed by Dr. Felix Zandman in 1962, are the gold standard for the electronic industry. With essentially zero TCR, zero PCR and extremely robust construction, they are the logical choice for all applications requiring unquestioned reliability and stability.

Resistor Stability Put to the Test (Demo Video)

In this video, host Richard Zuratt from VPG 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.

A head to head comparison of the survival rates of precision thin film nichrome (NiCr) resistors versus VFR Bulk Metal Foil resistors in a high humidity environment.

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.

VIDEOS

Bulk Metal® Foil Resistors Bulk Metal® Foil resistors, developed by Dr. Felix Zandman in 1962, are the gold standard for the electronic industry. With essentially zero TCR, zero PCR and extremely robust construction, they are the logical choice for all applications requiring unquestioned reliability and stability.

Resistor Stability Put to the Test (Demo Video) In this video, host Richard Zuratt from VPG 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.

A head to head comparison of the survival rates of precision thin film nichrome (NiCr) resistors versus VFR Bulk Metal Foil resistors in a high humidity environment. 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.