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FAQs

A mini relay has reduced body dimensions (typical 28mm × 25mm vs ~36mm × 28mm for a standard ISO relay) and reduced pin spacing — designed for fuse-box-integrated relay banks and tight-fitment applications where the standard ISO body footprint is too large. The pin pattern follows ISO 7588-2 and is not interchangeable with standard ISO 7588-1 relays. Sockets are mini-specific — a standard relay won't fit a mini-relay socket and vice versa.

Use a maxi relay where the circuit current exceeds 30-40A continuous — typical applications include starter motor circuits (where the relay cycles a high-current solenoid), large electric heaters (cab heaters, fuel heaters, glow-plug circuits), and large work-light banks. Maxi relays use heavier-gauge contacts and larger pin terminations to handle the current without overheating. The contact rating is listed on every product page.

Within the same pin pattern (mini for mini, maxi for maxi, standard for standard), a higher contact-rated relay is typically a safe substitute for a lower-rated one — the relay will still close on the original coil voltage and switch the original load with margin to spare. The opposite (lower-rated relay in a higher-current circuit) is unsafe and will overheat the contacts. Always check the pin pattern matches before substituting.

Yes. Sealed mini and maxi relays with IP65+ ratings are available for outdoor and harsh-environment applications — engine-bay-mounted, agricultural-equipment-mounted, and any installation exposed to wet, dust, or temperature extremes. Sealed relays are typically slightly larger than non-sealed equivalents but otherwise have the same pin pattern. The IP rating is listed on every sealed relay's product page.

Every product is backed by our Fit Guarantee. If a part is incompatible with your machine, you can return it hassle-free. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will arrange collection. For other returns, email us first to obtain a Return Merchandise Number before sending. Returns are accepted within 30 days of purchase, in original packaging, on UK orders. A restocking fee may apply on returns where the buyer has changed their mind. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and "Check where we deliver" confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Mini & Maxi Relay

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Within Relay, Mini & Maxi Relay covers the compact and high-current automotive relay variants used in plant, agricultural, and commercial-vehicle electrical systems — Mini Relays (compact ISO-pattern relays with reduced footprint, used in tight-space fitments and modern fuse-box-integrated relay banks) and Maxi Relays (higher-current relays sized for power applications such as starter circuits, electric heaters, and large work-light banks).

Parts for Machines supplies mini and maxi relays for the majority of plant, agricultural, and commercial-vehicle electrical-system applications. Mini relays follow the ISO 7588-2 standard pattern with reduced pin spacing and compact body dimensions; maxi relays follow the ISO 7588-3 high-current pattern with larger contacts and heavier-gauge pin terminations.

Product pages list the operating voltage (12V or 24V to match the system), the contact current rating (typical 20-30A for mini; 40-70A+ for maxi), the contact configuration (SPST single-throw or SPDT double-throw), the pin count and pin pattern (4-pin or 5-pin in the ISO mini and maxi standards), the coil current draw, the body dimensions (mini relays are typically 28mm × 25mm; maxi relays 36mm × 28mm or larger), and any sealing rating (IP65+ for sealed variants).

For replacement of an existing mini or maxi relay, match by the OEM part number stamped on the body where available, or by voltage, current rating, and pin pattern. Mini and maxi relay sockets and bases are not interchangeable with standard ISO relay sockets — the pin spacing and body dimensions differ. Mini relays are increasingly common in modern equipment as fuse-box-integrated relay banks reduce the available footprint per relay. Maxi relays are used in dedicated power circuits where the higher contact rating and heavier-gauge connections are needed. Trade pricing on bulk and fleet orders is available; contact the team via WhatsApp 07754288583.

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FAQs

A mini relay has reduced body dimensions (typical 28mm × 25mm vs ~36mm × 28mm for a standard ISO relay) and reduced pin spacing — designed for fuse-box-integrated relay banks and tight-fitment applications where the standard ISO body footprint is too large. The pin pattern follows ISO 7588-2 and is not interchangeable with standard ISO 7588-1 relays. Sockets are mini-specific — a standard relay won't fit a mini-relay socket and vice versa.

Use a maxi relay where the circuit current exceeds 30-40A continuous — typical applications include starter motor circuits (where the relay cycles a high-current solenoid), large electric heaters (cab heaters, fuel heaters, glow-plug circuits), and large work-light banks. Maxi relays use heavier-gauge contacts and larger pin terminations to handle the current without overheating. The contact rating is listed on every product page.

Within the same pin pattern (mini for mini, maxi for maxi, standard for standard), a higher contact-rated relay is typically a safe substitute for a lower-rated one — the relay will still close on the original coil voltage and switch the original load with margin to spare. The opposite (lower-rated relay in a higher-current circuit) is unsafe and will overheat the contacts. Always check the pin pattern matches before substituting.

Yes. Sealed mini and maxi relays with IP65+ ratings are available for outdoor and harsh-environment applications — engine-bay-mounted, agricultural-equipment-mounted, and any installation exposed to wet, dust, or temperature extremes. Sealed relays are typically slightly larger than non-sealed equivalents but otherwise have the same pin pattern. The IP rating is listed on every sealed relay's product page.

Every product is backed by our Fit Guarantee. If a part is incompatible with your machine, you can return it hassle-free. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will arrange collection. For other returns, email us first to obtain a Return Merchandise Number before sending. Returns are accepted within 30 days of purchase, in original packaging, on UK orders. A restocking fee may apply on returns where the buyer has changed their mind. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and "Check where we deliver" confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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