SHIRE / Relays & controllers
12V/24V relay listings: what to confirm before a bulk order
Does a relay marked 12V/24V mean two versions or one unit? Compare actual catalog records and write voltage-specific quotation lines.
A slash in a catalog is not a wiring specification. When a relay entry says 12V/24V, the purchasing task is to establish what the supplier is offering: separate versions, a stated operating range, or a catalog note that still needs clarification. Do not treat the slash as permission to connect a component to either voltage. Three SHIRE records show why the answer belongs in the quotation, not in an assumption.
Read voltage alongside function and reference
SAP-C408 is listed as a relay with reference 8-94112911-0 and remark “4P 12V/24V”. SAP-C345 is a different relay record, reference 8972629330, marked “24V 5P”. SAP-C331 is listed as a delay relay with “12V/24V 40A” and no OE reference. These are three catalog descriptions, not an interchangeability table. The stated current on one line cannot be transferred to another, and a delay relay should not be quoted as an ordinary relay without checking the required function.
Ask whether the slash separates orderable versions
Request a written answer identifying the exact voltage rating and part marking of the unit being quoted. If 12V and 24V are separate versions, ask how they are distinguished on the item and package, and split the required quantities into separate order lines. If the supplier states that a single unit supports a voltage range, request documentation for that exact item and the applicable conditions. The catalog wording alone does not resolve this question. Do not change a pending voltage field to “confirmed” merely because a quotation repeats 12V/24V.
Get the diagram without guessing the connections
A buyer looking for relay connections needs documentation tied to the offered reference. Ask for its terminal diagram, contact arrangement, coil rating, relevant load ratings and any polarity or suppression requirements. A 4P or 5P note only states a pin count; this article deliberately provides no generic wiring diagram for these catalog records. Have a qualified technician check the supplied documentation against the intended circuit. For a delay relay, also request its timing behavior and confirmation method rather than borrowing a specification from another product.
Make the approved voltage visible through delivery
For each confirmed version, the purchase line should carry the supplier’s exact item code, voltage, quantity and the drawing or datasheet revision used for approval. Ask for the same distinction on individual packaging and carton labels when a shipment contains both voltages. At receiving, compare those markings with the approved line before releasing stock; any functional testing needs an agreed method and qualified personnel. This gives the buying and warehouse teams a shared record. Use the linked catalog items to start an inquiry, with unresolved ratings explicitly marked as questions.
Purchasing guidance, not installation or diagnostic instructions. Confirm compatibility and specifications with the supplier and a qualified technician.
Catalog examples — not confirmed substitutes
SAP-C408
Relay
OE references: 8-94112911-0
Catalog specifications ↗
SAP-C345
Relay
OE references: 8972629330
Catalog specifications ↗
SAP-C331
Delay relay
OE references: —
Catalog specifications ↗Compare the actual catalog records
These are current catalog examples, not an approved substitution list. OE references and remarks below are reproduced from the supplied records; they do not establish compatibility, stock or electrical performance.
Editorial basis: this guide uses the current SHIRE catalog records shown above. AI assisted the multilingual wording; model, OE and catalog-note fields were checked against the supplied records. No physical product test was performed.
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