SDR01 MZP High Anti-Surge Chip Resistors

Introduction

ROHM Semiconductor’s SDR01 MZP series is a range of thick-film chip resistors designed for circuits where transient electrical stress is a significant concern. The series combines high anti-surge performance with a 0.33 W power rating in a compact 1005 (0402) package, while also carrying AEC-Q200 qualification.

Its proprietary resistive-element structure is intended to improve surge tolerance compared with conventional chip resistors. This makes the series relevant where small surface-mount resistors must withstand conditions such as transient voltages, inrush current, or electrostatic discharge.

What it does

SDR01 MZP resistors provide standard resistance functions while targeting improved robustness against surge-related stress. They are thick-film devices available across a wide resistance range, from 1 Ω to 10 MΩ.

The series supports two tolerance options:

• ±1% (F)
• ±5% (J)

Devices are specified for operation from -55°C to +155°C, supporting use across broad temperature environments. A 0.33 W rating in the 1005 (0402) footprint is a notable characteristic for designs that need a compact resistor while accounting for electrical transients.

AEC-Q200 qualification further identifies the series as suited to applications where passive-component qualification requirements are relevant.

Applications

Potential uses that follow from the stated characteristics include:

• Automotive electronic circuits requiring AEC-Q200-qualified resistors
• Input, sensing, or protection networks exposed to transient voltages
• Circuits subject to inrush-current events
• Compact surface-mount designs requiring resistance values from low-ohm to megohm ranges
• Electronics operating across extended temperature ranges
• ESD-exposed signal or interface circuitry where resistor surge robustness is a design consideration

Design considerations

The SDR01 MZP is supplied in a 1005 (0402) chip package, so PCB land pattern design, assembly capability, and placement accuracy should be considered alongside its electrical ratings.

Resistance selection spans 1 Ω to 10 MΩ, with either ±1% or ±5% tolerance available. Designers should select the appropriate tolerance according to the accuracy required by the circuit rather than assuming all values are offered at the same tolerance.

For circuits exposed to surge, inrush, or ESD conditions, the resistor should be evaluated in the context of the complete transient environment, including expected voltage and current stress, pulse conditions, and surrounding protection components. The stated -55°C to +155°C operating range should also be considered against the intended board and enclosure temperature conditions.

Availability and further information

Further product details are available through the Mouser Electronics source link and the datasheet link provided on this page.