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4.5 (2 reviews)

Enhance relay testing precision with the RB10 Resistor Box. Versatile and reliable, it offers controlled current and multiple resistance ranges.

  • 0.5 ohms to 1666.5 ohms in 8 steps
  • Maximum current 0.2-10A
  • Improves current control into low impedance loads
  • Particularly suitable for solid state relays
  • Can be used as swamping impedance for non-linear loads
  • Thermal cut out


The RB10 Resistor Box works alongside a current injection unit to enable precise testing of low impedance relays and trips. It provides finer control of the current, ensuring accurate results. Designed for use with the 100ADM mk1-5 and 200ADM-P, it can also be used with other suitable current sources.

Featuring eight resistance ranges, the RB10 Resistor Box dissipates a maximum power of 50W per resistor. Its durable aluminium case ensures robustness, while the front panel’s industry-standard 4mm safety sockets facilitate easy connections.

The RB10 Resistor Box operates within a wide temperature range of 0°C to 45°C, ensuring reliable performance in various environments. It includes over-temperature protection and a fused common terminal (T10A fuse) for added safety.

In summary, the RB10 Resistor Box is an indispensable tool for engineers and technicians conducting accurate and controlled testing of low impedance relays and trips. With its compatibility, resistance range options, durable construction, and safety features, it proves ideal for various industries.

This product is available in the United Kingdom through our esteemed partners, such as Acutest, Alpha Electronics, Cuthbertson Laird, Norwich Instrument Services, and PASS Ltd. For customers outside of Great Britain, the product can be conveniently ordered from our extensive global distribution network.

RB10 Resistor Box Datasheet


Additional information

Weight2 kg
Dimensions220 × 163 × 330 mm
Supplied Accessories

Calibration certificate
Low current leads

2 reviews for RB10 RESISTOR BOX

  1. Youssef Mahmoud

    I won one of these long time ago, didn’t think much about it at first. 20 years later and it is still a part of my kit.

  2. Aiden O’Connor

    Same old resistor box, doesn’t look fancy in any way but performs whenever you need it to.

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