Siemens SIRIUS 3RV2421 size S0 protection device for transformer protection (high instantaneous trip), transformer protection, class 10, without auxiliary switches. Available for rated currents 0.16–25 A with adjustable thermal overload release and fixed instantaneous (short-circuit) release.
Technical data
| Series | 3RV2421 |
|---|---|
| Size | S0 |
| Application | Transformer protection (high instantaneous trip) |
| Trip class | 10 |
| Auxiliary switch | none |
| Rated current range | 0.16–25 A |
| Mounting | Screw or snap-on mounting on TH35 DIN rail |
| Connection | Screw or spring-loaded terminals |
| Standard | IEC 60947-2, IEC 60947-4-1 |
Article numbers
| In (A) | Setting range (A) | Instantaneous release (A) | Icu 400 V (kA) | Version | Screw | Spring-loaded |
|---|---|---|---|---|---|---|
| 0.16 | 0.11–0.16 | 3.3 | 100 | – | 3RV2421-0AA10 | – |
| 0.2 | 0.14–0.2 | 4.2 | 100 | – | 3RV2421-0BA10 | – |
| 0.25 | 0.18–0.25 | 5.2 | 100 | – | 3RV2421-0CA10 | – |
| 0.32 | 0.22–0.32 | 6.5 | 100 | – | 3RV2421-0DA10 | – |
| 0.4 | 0.28–0.4 | 8.2 | 100 | – | 3RV2421-0EA10 | – |
| 0.5 | 0.35–0.5 | 10 | 100 | – | 3RV2421-0FA10 | – |
| 0.63 | 0.45–0.63 | 13 | 100 | – | 3RV2421-0GA10 | – |
| 0.8 | 0.55–0.8 | 16 | 100 | – | 3RV2421-0HA10 | – |
| 1 | 0.7–1 | 21 | 100 | – | 3RV2421-0JA10 | – |
| 1.25 | 0.9–1.25 | 26 | 100 | – | 3RV2421-0KA10 | – |
| 1.6 | 1.1–1.6 | 33 | 100 | – | 3RV2421-1AA10 | – |
| 2 | 1.4–2 | 42 | 100 | – | 3RV2421-1BA10 | – |
| 2.5 | 1.8–2.5 | 52 | 100 | – | 3RV2421-1CA10 | – |
| 3.2 | 2.2–3.2 | 65 | 100 | – | 3RV2421-1DA10 | – |
| 4 | 2.8–4 | 82 | 100 | – | 3RV2421-1EA10 | – |
| 5 | 3.5–5 | 104 | 100 | – | 3RV2421-1FA10 | – |
| 6.3 | 4.5–6.3 | 130 | 100 | – | 3RV2421-1GA10 | – |
| 8 | 5.5–8 | 163 | 100 | – | 3RV2421-1HA10 | – |
| 10 | 7–10 | 208 | 100 | – | 3RV2421-1JA10 | – |
| 12.5 | 9–12.5 | 260 | 100 | – | 3RV2421-1KA10 | – |
| 16 | 10–16 | 286 | 55 | – | 3RV2421-4AA10 | 3RV2421-4AA20 |
| 20 | 13–20 | 325 | 55 | – | 3RV2421-4BA10 | 3RV2421-4BA20 |
| 22 | 16–22 | 364 | 55 | – | 3RV2421-4CA10 | 3RV2421-4CA20 |
| 25 | 18–25 | 400 | 55 | – | 3RV2421-4DA10 | 3RV2421-4DA20 |
| 16 | 10–16 | 286 | 55 | without phase failure detection (1-, 2-, 3-phase loads) | – | 3RV2421-4AA20-0DA0 |
| 20 | 13–20 | 325 | 55 | without phase failure detection (1-, 2-, 3-phase loads) | – | 3RV2421-4BA20-0DA0 |
| 20 | 13–20 | 325 | 55 | special conditions down to −50 °C | 3RV2421-4BA10-0BA0 | – |
Versions for special conditions down to −50 °C have limited mechanical endurance and no UL/CSA, ATEX or IECEx approval (catalog footnote). Auxiliary switches and other accessories are ordered separately.
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 7, protection equipment) and are for information only. Image is representative.
For price, stock and lead time, use the Request a Quote button or call +90 533 945 27 94. Sending the article number is enough.
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