Vishay’s Reliable Thin Film MELF Resistors for Precise Current Measurement

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Devices Feature Extended Resistance to Lower Ohmic Values < 1 Ω, Tighter
Tolerance, and Low Temperature Coefficient

Vishay Intertechnology’s Professional Thin Film MELF Resistors Provide High Stability and Reliability for Precise Current Measurement in Lighting, Industrial, and Automotive Applications

Vishat InterTEchVishay Intertechnology today announced that it has extended its AEC-Q200-qualified Professional Thin Film MELF resistors to tighter tolerance in the low-ohmic range below 1 Ω for the 0204 and 0207 case sizes. In addition to providing a low temperature coefficient, the improved Vishay Beyschlag MMA 0204 and MMB 0207 allow for more precise current measurement in LED lighting, industrial, automotive, and renewable energy applications with high stability and reliability requirements than previous-generation devices.

Built on an advanced metal film technology, the devices released today offer an extended resistance range down to 0.22 Ω with tolerance of ± 1 %, low TCR of ± 50 ppm/K, and rated power dissipation to 1 W at +70 °C. The professional thin film MELF resistors, available in 0102, 0204, and 0207 case sizes, feature a robust design, intrinsic sulfur resistance, and excellent overall stability that exceeds class 0.25.

Thin Film MELF ResistorsThe MMU 0102, MMA 0204, and MMB 0207 provide proven reliability for current sensing in DC/DC conversion and pulse-width modulation in LED drivers, solar inverters, industrial electronics, and battery management systems for electric and hybrid vehicles, in addition to telecom and medical equipment. The devices are backed by Vishay’s more than 30 years of experience developing thin film MELF resistors.

Suitable for processing on automatic SMD assembly systems, the lead (Pb)-free devices are RoHS-compliant, halogen-free, and Vishay Green.

Device Specification Table:

Part #

MMU 0102

MMA 0204

MMB 0207

Case size

0102

0204

0207

Resistance range (Ω)

0.22 to 2.21 M

0.22 to 10 M

0.1 to 15 M

Tolerance (%)

± 5; ± 2; ± 1; ± 0.5

± 5; ± 1; ± 0.5

± 5; ± 2; ± 1; ± 0.5

TCR (ppm/K)

± 50; ± 25

± 50; ± 25

± 100; ± 50; ± 25

Rated dissipation P70 (W)

0.3

0.4

1.0

Operating voltage (V)

150

200

350

Operating temp. range (°C)

-55 to +155

Samples and production quantities of the MMU 0102, MMA 0204, and MMB 0207 are available now, with lead times of six to eight weeks for larger orders. For more info, visit: http://www.vishay.com/docs/28713/melfprof.pdf

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