The SIOV-CT 0603 M 4 G is a clamped diode produced by EPCOS company. It features multilayer technology, ESD protection, surge current up to 1200 A, bidirectional clamping, working temperature up to 125 °C, controllable capacitance models, good solderability, and PSpice models.
This handbook describes the EPCOS multilayer (MLV) standard series of surface‑mount device (SMD) varistors. It covers construction details such as multilayer technology and termination options, features like bidirectional clamping and ESD protection, and packaging formats including tape and reel dimensions.
The document lists maximum ratings, characteristic curves, dimensional data, and ordering codes for a wide range of sizes (0402‑2220) and termination types (nickel barrier or silver‑palladium). It also includes recommended solder‑pad layouts, weight specifications, and regulatory notes.
| Termination types | nickel barrier (CT) or silver palladium (CN) |
|---|---|
| Maximum operating temperature | up to 125 °C (for 0805 … 2220 sizes) |
| Response time | <0.5 ns |
| Solderability | 235 °C, 2 s |
| Weight per device | <0.2 g |
EPCOS SMD varistors can be terminated with either a nickel barrier (CT) or a silver‑palladium (CN) termination.
The varistors are rated for continuous operation up to 125 °C for sizes 0805 to 2220.
For a 0603 varistor (CTO603) the recommended pad dimensions are 0.6 mm × 1.7 mm.