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| Current Rating | Fixing Centres | BS88 Dim. Ref. | Part Number | Equivalent Bussmann | Equivalent Lawson | Equivalent MEM |
| 20M25 . 20M32 . 32M40 . 32M50 . 32M63 . | 44,5mm 44,5mm 44,5mm 44,5mm 44,5mm | A1 A1 - - - |
NIT20M25 NIT20M32 NET32M40 * NET32M50 * NET32M63 * | NITD20M25 NITD20M32 NITD32M40 NITD32M50 NITD32M63 | NIT20M25 NIT20M32 - - - |
20SA2M25 20SA2M32 32SA2M40 32SA2M50 32SA2M63 |
| 32M35 32M40 32M50 32M63 |
73mm 73mm 73mm 73mm |
A2 A2 A2 A2 |
TIA32M35 TIA32M40 TIA32M50 TIA32M63 | - - - - |
- - - - |
- - - - |
| 63M80 63M100 | 73mm 73mm |
A3 |
TIS63M80 TIS63M100 | - - |
- - |
- - |
| 100M125 100M160 100M200 | 94mm 94mm 94mm |
A4 A4 A4 |
TCP100M125 TCP100M160 TCP100M200 | - - - |
- - - |
- - - |
| 100M125 100M160 100M200 | 111mm 111mm 111mm | B1 B1 B1 |
TC100M125 TC100M160 TC100M200 | - - - |
- - - |
- - - |
| 200M250 200M315 | 111mm 111mm | B2 B2 |
TF200M250 TF200M315 | - - |
- - |
- - |
| 315M355 | 111mm | B3 | TKF315M355 | - | - | - |
| 400M450 | 111mm | B4 | TMF400M450 | - | - | - |
| 400M450 | 133mm | C1 | TM400M450 | - | - | - |
| 630M670 | 133mm | C2 | TTM630M670 | - | - | - |
Note: The comparative types listed are a guide to interchangeability. There are some minor dimensional differences between manufacturers. The above cross-reference chart is based on comparable voltage and current ratings. It is essential that other performance characteristics are checked to ensure compatibility.
(Information from Red Spot catalogue.)
