SINOFUSE RS306-2-W1Z High-Speed Fuse Series, 400–1250 A, AC 690 V
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The SINOFUSE RS306-2-W1Z is a size-2 high-speed fuse family in the RS306 line, with 11 verified model ratings from 400 to 1250 A. The supplied manufacturer sheet identifies the W1Z family at AC 690 V under IEC and AC 700 V under UL, and provides per-model I²t values at 690 V together with power-loss data. All included RS306-2-W1Z variants use size code 2 and share the same published dimensional set and M10 mounting recommendation. This series page is structured for procurement teams that need to compare exact models by current rating and performance data while keeping common voltage and mechanical information separate from variant-specific values.
RS306-2-W1Z Series Overview
The verified RS306-2-W1Z subset covers 400 A, 450 A, 500 A, 550 A, 630 A, 700 A, 800 A, 900 A, 1000 A, 1100 A, and 1250 A ratings. Each model uses the same size-code-2 mechanical format shown in the manufacturer sheet. The published comparison data differentiates the models by rated current, pre-arcing I²t, fusing I²t, and power loss, allowing technical buyers to review electrical performance without mixing variant values into the shared series specifications.
Technical Specifications
| Specification | Series Data |
|---|---|
| Product type | High-speed fuse |
| Included rated-current range | 400–1250 A |
| Rated voltage | AC 690 V (IEC); AC 700 V (UL) |
| Size code | 2 |
| Published dimensions | A 50 ±2 mm; B 107 ±2 mm; C 139 ±2.5 mm; D 60 ±2 mm; F 32 ±0.5 mm; H 11 ±0.5 mm; M 27.5 ±1 mm; N 16 ±1 mm |
| Recommended mounting | M10 bolts and nuts; recommended tightening torque 21 N·m |
| I²t reference voltage | 690 V |
Technical data reference: SINOFUSE RS306 快速熔断器 (High-Speed Fuse) technical sheet, page 3.
RS306-2-W1Z Model Selection
The series provides 11 verified current ratings from 400 A through 1250 A. Select the required model first by rated current, then compare the published pre-arcing I²t, fusing I²t, and power-loss values where those parameters matter to the protected circuit. All models listed below use size code 2, but electrical and mechanical requirements should still be confirmed against the equipment design. Verify the complete MPN before ordering or replacement review.
| Exact MPN | Rated Current | Pre-arcing I²t @ 690 V | Fusing I²t @ 690 V | Power Loss |
|---|---|---|---|---|
| RS306-2-W1Z-400A690V | 400 A | 11,800 A²s | 74,000 A²s | 60 W |
| RS306-2-W1Z-450A690V | 450 A | 18,000 A²s | 105,000 A²s | 64 W |
| RS306-2-W1Z-500A690V | 500 A | 25,000 A²s | 143,000 A²s | 69 W |
| RS306-2-W1Z-550A690V | 550 A | 31,500 A²s | 190,000 A²s | 74 W |
| RS306-2-W1Z-630A690V | 630 A | 42,800 A²s | 275,000 A²s | 79 W |
| RS306-2-W1Z-700A690V | 700 A | 60,800 A²s | 403,000 A²s | 90 W |
| RS306-2-W1Z-800A690V | 800 A | 87,000 A²s | 563,000 A²s | 106 W |
| RS306-2-W1Z-900A690V | 900 A | 126,000 A²s | 805,000 A²s | 110 W |
| RS306-2-W1Z-1000A690V | 1000 A | 175,000 A²s | 1,080,000 A²s | 115 W |
| RS306-2-W1Z-1100A690V | 1100 A | 227,000 A²s | 1,430,000 A²s | 120 W |
| RS306-2-W1Z-1250A690V | 1250 A | 355,000 A²s | 2,150,000 A²s | 128 W |
Verified Applications
The supplied RS306 W1Z technical material does not state specific end-use applications for the RS306-2-W1Z subset. For procurement and replacement review, suitability should therefore be evaluated from the documented electrical ratings, I²t values, power loss, size code, dimensions, and mounting requirements rather than from an assumed application label.
B2B Sourcing and Replacement Support
Apexon Supply provides independent B2B sourcing support for the SINOFUSE RS306-2-W1Z series, including exact-model identification and difficult-to-find part sourcing. For replacement work, confirm the required current rating, voltage requirement, mechanical fit, and complete manufacturer MPN before approving a substitute or replacement path.
Submit the complete MPN, selected current rating, required quantity, and application or equipment requirements for RFQ review. Apexon Supply can support technical alignment and sourcing options without implying interchangeability until the electrical and mechanical requirements have been checked.
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