Lawson Fuse Comparison Chart

Cross Reference

Enter a part number from any manufacturer (e.g. TIA, TKF, SF5, AAO, NO9, FB3, Y - WB) — or use the dropdowns to narrow by fixing centres or rating. Lawson codes are highlighted as our primary stock.

Full Reference Table

The complete Lawson comparison chart. Click any row to pull it up in the cross-reference panel above — where we hold the dimensional data, the panel also shows fixing centres, current rating and BS88 size class.

About These Fuses

Quick notes on reading the chart and the BS88 industrial fuse range.

• The Lawson (F4P) reference in the first column is the code we order and stock against. Every other column is a legacy or competitor code that cross-references to it.
• BS88 (now BS EN 60269) is the British / European standard for high-breaking-capacity (HRC) industrial fuses used in distribution boards, control panels and motor circuits.
• Where a cell lists several codes, they are variants within the same family — usually different tag arrangements, body lengths or voltage ratings. Check the physical dimensions before ordering.
• Fixing centres (44.5 / 73 / 94 / 111 / 133 / 165 mm etc.) describe the bolt-hole spacing between tags. They are the key dimension when replacing a fuse in an existing fuse-holder. Off Set Tags have the tag offset from the body centreline; Central Tags have the tag on the body axis — the two are not interchangeable.
• The BS88 reference (A1, A2, A3, A4, B1–B4, C1–C3) groups fuses by physical size class. Most modern catalogues quote both the BS88 ref and the fixing centres.
• Letter codes (NIT, TIA, TIS, TCP, TF, TKF, TM, TTM, TLM…) are the long-standing GEC / Lawson naming. Dorman Bussmann (NITD, AAO, BAO, CEO…), MEM (SA2, SB2, SD5…), Hawker / Brush (F21, HO7, L14…), Fluvent, Reyrolle and EMP all have their own equivalents — this chart lines them up row by row.
• A dash (–) means no direct equivalent is listed in that range. Call us on 020 8853 0026 and we'll identify it from the fuse body.