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Home > Technology List > Thin Film MELF Resistors enable precise current measurement.

Thin Film MELF Resistors enable precise current measurement.

Update Time: 2019-12-20 00:00:00

MALVERN, Pa. — Vishay Intertechnology, Inc. (NYSE: VSH) 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.

The 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

Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader.

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