Bussmann EVH Series 70VDC Fuses - Selection Guide
The Eaton Bussmann EVH series is a range of UL certified bolt-down DC fuses rated 70 VDC from 60 A to 500 A, all with a 6,000 A interrupting rating. They are built to the ISO 20934 Type SF51 footprint — the same 50.9 mm bolt spacing as a conventional MEGA fuse — so they drop into existing MEGA positions while more than doubling the voltage rating and tripling the breaking capacity.
Use the selection table below to pick a rating, then order the individual fuse. We stock the M8 bolt version (EVH-XXX part numbers).
Why the 70 VDC rating matters
Most MEGA-format fuses are rated 32 VDC. A 48 V nominal LiFePO₄ bank charges to 58.4 V — well above that rating. DC faults have no zero-crossing to help quench the arc, so a fuse asked to interrupt above its rated voltage may not clear the fault. A 32 V MEGA on a 48 V bank is one of the most common quiet mistakes in DIY lithium installs. The EVH's 70 VDC rating covers 12 V, 24 V and 48 V nominal systems with margin.
We wrote this up in more detail here: Your 48V Lithium System Probably Has a 32V Fuse In It.
Sizing interrupting capacity for lithium
The 2025 revision to ABYC E-11 sets the interrupting-capacity requirement for lithium-ion batteries at 5,000 A for every 100 Ah of capacity, and calls for overcurrent protection at each individual battery on banks above 500 Ah. On that basis a 6,000 A device covers a single battery of roughly 120 Ah or less, and the EVH is well suited to that per-battery position inside a larger bank. Main protection on a large bank still belongs to a Class T fuse sized to the whole bank.
Ampere rating and interrupting rating are separate questions. A 500 A EVH still only interrupts 6,000 A — picking a bigger fuse does not buy you more fault-clearing capacity.
These figures reflect our reading of the 2025 revision and are given for general guidance. Confirm the requirement against the current published standard for your application.
Selection table
| Rating | Conductor | Max V-drop | Pre-arcing I²t | Total I²t |
|---|---|---|---|---|
| 60 A | 6 mm² (10 AWG) | 110 mV | 7,000 | 8,400 |
| 80 A | 10 mm² (8 AWG) | 110 mV | 19,000 | 22,800 |
| 100 A | 10 mm² (8 AWG) | 110 mV | 25,000 | 30,000 |
| 125 A | 16 mm² (6 AWG) | 110 mV | 57,000 | 68,400 |
| 150 A | 25 mm² (4 AWG) | 110 mV | 95,000 | 114,000 |
| 175 A | 25 mm² (4 AWG) | 110 mV | 169,000 | 202,800 |
| 200 A | 35 mm² (2 AWG) | 110 mV | 230,000 | 276,000 |
| 225 A | 35 mm² (2 AWG) | 110 mV | 264,000 | 316,800 |
| 250 A | 50 mm² (1/0 AWG) | 110 mV | 359,000 | 430,800 |
| 300 A | 50 mm² (1/0 AWG) | 80 mV | 331,000 | 397,200 |
| 350 A | 50 mm² (1/0 AWG) | 80 mV | 762,000 | 914,400 |
| 400 A | 70 mm² (2/0 AWG) | 80 mV | 278,000 | 333,600 |
| 450 A | 70 mm² (2/0 AWG) | 80 mV | 469,000 | 562,800 |
| 500 A | 70 mm² (2/0 AWG) | 80 mV | 762,000 | 914,400 |
I²t values in A²s. Conductor sizes are Eaton's recommendation; AWG equivalents are nearest standard size and should be checked against your ampacity and voltage-drop calculation.
Common specifications across the range
- Rated voltage 70 VDC; interrupting rating 6,000 A @ 70 VDC (TC = 2 ± 0.5 ms)
- UL certified
- Operating temperature −40 °C to +125 °C
- Housing PPA; terminals matt tin-plated copper
- Bolt centres 50.9 mm, overall length 68 mm, body height 9.9 mm; M8 bolts (8.55 mm holes)
- Torque 20 N·m ±1
- ISO 20934-2019 Type SF51; RoHS and ELV compliant
- Continuous current: the 60–250 A ratings hold 100% of rating for at least 4 hours; the 300–500 A ratings are characterised at 75%. Size against actual continuous load.
In stock
EVH-125 · EVH-150 · EVH-300 · EVH-350 · EVH-400 · EVH-500
Ratings not listed above are available to order. Jonsson Tech designs, installs and commissions these systems — send us your one-line and we will size the protection with you.