Multi-function DIN-rail time relays with 0.1 s to 600 h range, 16 A contact rating, and AC/DC 12-240 V coils remain the volume SKU on 2026 sourcing platforms, with 12 V/24 V DC automotive-grade units shipping at roughly US$6 per piece MOQ 1 and CE/CB-marked GRT8-B type delay-off units listing at US$17.29-25.94 MOQ 29 [S1][S3].
For control-panel engineers, the buying decision still comes down to four binding gates: timing function, time range, contact configuration, and supply voltage. Pick those four correctly, and the rest — brand, terminal type, mounting width — is a secondary filter.
Time Relay Function Classes Available in 2026
Eight timing functions appear in mainstream 2026 catalogues, mapped to IEC 61812-1 function codes: on-delay (A), off-delay (B), interval (C), flicker-start-on (D), flicker-start-off (E), pulse (F), one-shot / pulse generator, and star-delta [S5]. The most quoted single-function SKU in the Made-in-China 2026 index is the on-delay relay at roughly US$6 per piece MOQ 1 in the 12 V/24 V DC automotive grade [S3].
Multi-function units — the "8-in-1" or "10-in-1" category typified by the GRT8-B delay-off switch — let the user select the function via a front-panel rotary switch instead of ordering eight part numbers [S1]. For panel builders maintaining spares stock, that consolidation matters more than a 20 % price premium.
Time Range, Contact Class, and Coil Voltage Envelopes
The working envelope that covers 90 % of industrial panel builds in 2026: 0.1 s minimum step, 600 h (≈ 25 days) maximum range, 16 A resistive contact rating (AC-1 / 250 V), and a universal AC/DC 12-240 V supply input on the higher-end multi-function SKUs [S1]. Dedicated 12 V/24 V DC automotive time-delay relays sit at the low end at roughly US$6.00-6.60 per piece, while the universal-coil CE/CB-marked delay-off unit lists at US$17.29-25.94 per piece MOQ 29 [S1][S3].
Below the 16 A contact class, two narrower niches dominate: 8 A PCB-mount or socket-mount relays for OEM machine builders, and 30 A-40 A plug-in industrial relays for HVAC and motor-starting. For deeper context on relay contact families, see the industrial relay reference page.
Pinout, Mounting, and Standards: What 2026 Buyers Verify
Three pin patterns cover the volume market: 8-pin octal (35 mm socket), 11-pin octal (35 mm or 45 mm socket), and blade/DIN-rail direct-mount like the GRT8-B. Verify the socket footprint against existing panel stock before quoting a substitution — the 8-pin and 11-pin octal patterns are not interchangeable. Supply-side safety evidence asked for on 2026 European and Middle-East RFQs is CE (LVD + EMC) plus a third-party CB scheme certificate; for North America, look for UL 508 recognition on the specific part number, not just the family. [S2]
Two pitfalls repeat on 2026 RFQs. First, the function code "A" / "B" / "C" / "D" varies between vendors — confirm against the timing diagram in the datasheet, not the catalogue shorthand. Second, a "16 A" rating on a Chinese-factory listing often means AC-1 / 250 V resistive; the same relay on a 3-phase motor contactor coil may only deliver 3 A. For applications that demand a proven safety-rated timing function — elevator doors, press guards, e-stops — step up to a dedicated safety relay instead of a general-purpose time relay.
Who Should Pick a Time Relay — and Who Should Not
Time relays are the right call when the load is a contactor coil, a solenoid valve, a small heating element, or an indicator lamp, and the logic is "wait, then act". They are also the right call when timing must survive a control-power blip, since on-delay units reset cleanly on voltage dip. If the requirement is sub-100 ms precision, retriggerable logic, or counting events, a PLC timer function block beats a time relay on cost and flexibility. If the requirement is a guaranteed safe stop with a Category 1 / PL c architecture, a safety relay or a safety timer module is the correct category — a general-purpose time relay does not carry the safety integrity claim. [S2]
For OEM machine builders, the volume play in 2026 is the 8-pin octal socket-mounted, multi-function, universal-coil SKU at roughly US$10-25 per piece depending on certification pack. For facility and panel-maintenance buyers maintaining mixed-vintage panels, the GRT8-B-style DIN-rail delay-off switch at US$17.29-25.94 MOQ 29 is a workable replacement for legacy delay-on-make / delay-on-break timers, with the 1-day lead time cited for stock SKUs helping on emergency spares calls [S1].
Comparison: Function Class vs Timing Range vs Typical Use
Four realistic SKUs cover most 2026 sourcing requests. (1) On-delay, 0.1 s-100 h, AC/DC 12-240 V, 16 A, 8-pin octal — the workhorse for motor starters and HVAC staging, listed around US$6 for the 24 V DC automotive variant and US$10-15 for the universal-coil variant [S3][S5]. (2) Off-delay / delay-on-break, 0.1 s-600 h, AC/DC 12-240 V, 16 A, DIN-rail — the GRT8-B class, US$17.29-25.94 MOQ 29 with CE/CB [S1]. (3) Star-delta, fixed or adjustable transition, 8-pin octal, 10 A-16 A — for reduced-voltage motor starting; verify the adjustable dwell window against the contactor drop-out time. (4) Recycle / flicker, 0.1 s-100 h, multi-function rotary, DIN-rail — duty-cycle timers for irrigation, signage, and ventilation cycling.
For decision logic, the 8-pin octal universal-coil on-delay covers the largest single slice of 2026 RFQs. If the load is a contactor coil under 5 A and the timing is on-delay, this is the shortlist default. The DIN-rail delay-off SKU becomes the default when the existing panel has no socket rail and the application is "keep running for N seconds after a stop signal" — fan overrun, lamp cool-down, valve closure. For OEM cabinet builders, see Time Relay Selection: Four Binding Gates, 0.1 s to 600 h for the full decision tree.
Sourcing Realities on 2026 Platforms and Lead-Time Signals
Two price bands are visible on 2026 B2B platforms. The US$4-7 band covers 12 V/24 V DC automotive-grade time-delay relays, MOQ 1-10 pieces, often private-label [S3][S5]. The US$17-26 band covers CE/CB-marked universal-coil DIN-rail units like the GRT8-B, MOQ typically 29 pieces, with a 1-day lead time on stock SKUs [S1]. Anything quoted below US$4 with a CE mark is a red flag — third-party CB certification and LVD+EMC test reports carry real cost, and a sub-US$4 price usually means self-declared compliance only.
Two follow-on signals worth tracking into late 2026: (1) the cost of UL 508-listed multi-function time relays versus the CE/CB-only equivalent — for North American OEM builds this delta often dictates the part number; (2) the availability of IO-Link or Modbus-RTU timing modules as the digital-control alternative to electromechanical time relays, which start to displace 16 A time relays on new machine builds where a PLC or remote I/O is already in the cabinet. For related module-side decision logic, see Fieldbus Gateway Buying Guide 2026: Protocol, Zone, and Segment Match and the relay module reference page.
