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Brand

HELLA

Vehicle parts, and the only standard on the shelf

One of these two listings is the only product in its whole lot to cite a standard.

The isolator

DIN/ISO 40050-IPX2. And a table nobody else prints: 35 mm² at 100 A, 70 mm² at 250 A, 250 mm² at 500 A.

Three pairs of numbers saying both what the switch carries and what to bring it in on. Undersized tails are how a correctly rated switch ends up hot, and this is the only listing in the catalogue that addresses it.

The key

Red, removable in the off position. That makes it a lock-off rather than a switch: the circuit cannot be brought back by someone leaning on it. A replacement key part number is published too.

The surge

Maximum 1000 A for 10 seconds at 12 V. A figure with a duration and a voltage, which is the honest form.

The other listing

A fuse holder set whose bullets describe the maker’s range rather than the part — every one of the seven specification lines on that shelf is absent.

The part number is real and resolves in a proper catalogue. That is a different purchase from an unbranded holder with the same silence, and the page says so.

Everything HELLA puts on these shelves, one page each

  • HELLA S33 battery isolator with a red key

    HELLA S33 key-operated isolator, 1000 A for 10 s at 12 V, DIN/ISO 40050-IPX2

    A key-operated battery isolator for positive or negative lines, rated 1000 A for ten seconds at 12 V, built to DIN/ISO 40050-IPX2 with two screw terminals.

    Continuous
    Not published as a single figure — instead the listing gives the supply cross-section for each continuous current: 35 mm² at 100 A, 70 mm² at 250 A, 250 mm² at 500 A, fourth bullet
    Intermittent current
    Maximum 1000 A for 10 seconds at 12 V, sixth bullet
    DC voltage rating
    12 V, sixth bullet
    Load-switching capability
    Nowhere in the listing; it switches battery and ignition current, first bullet
    Terminals
    Two screw studs, two nuts supplied per stud, third bullet
    Mounting
    Panel-mounted, rotary operation, from the title
    Operation
    A red key, removable in the off position; either the positive or the negative line can be switched, first and second bullets. DIN/ISO 40050-IPX2, seventh bullet
    Amazon reference
    B004K1ND2C (same reference on 6 Amazon marketplaces)
    EAN
    4082300002508
    • The only switch in this catalogue to cite a standard: DIN/ISO 40050-IPX2
    • Supply cross-sections published against three current levels — it tells you what to wire it with
    • No single continuous rating, so the figure has to be read off the cross-section table

    Best for: A workshop or commercial vehicle where the isolator has to be locked off.

    ≈ $22 / €15
    Check price on Amazon
  • HELLA fuse holder set of two in packaging

    HELLA Pair of fuse holders, original-equipment quality

    A set of two fuse holders described as original-equipment quality, intended for small retrofits and additions to vehicle wiring.

    Fuse standard
    Nowhere in the listing
    Current
    Nowhere in the listing
    Voltage ratings including DC
    Nowhere in the listing
    Terminals
    Nowhere in the listing
    Mounting
    Nowhere in the listing
    Ingress rating
    Nowhere in the listing
    Supplied fuses
    Two holders in the set, from the title; no fuse is mentioned
    Amazon reference
    B00H8WLHIC (same reference on 6 Amazon marketplaces)
    EAN
    4082300100556
    • A genuine vehicle-parts number, which a supplier catalogue can be searched against
    • Original-equipment quality, stated by a maker that supplies vehicle manufacturers
    • Every one of the seven specification lines is absent from the listing

    Best for: Someone who will look the part number up in a proper catalogue before ordering.

    ≈ £3 / €4
    Check price on Amazon

A price quoted in the text of a PowerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.