SUL181h Timer

About the SUL181h Timer

The SUL181h Timer is part of the ELEHPD Timer range. CLASSIFCATION TIMER MODEL SUL181h CONTACT CAPACITY AC220V 16A FULL TIMING RANGE 24h CONTACT RESISTANGE ≤50mΩ INSULATION RESISTANCE ≥100mΩ COIL VOLTAGE 220V AC LIFE ELECTRICAL 10 7times MECHANICAL 10 5times OPERATING TEMPERATURE -40℃ ～＋55℃ STO NAGE BATTERY time 150h SET UP TIMES 30 m/per times 48 times REMARKS - ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right Timer

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

Timer

CLASSIFCATION	TIMER
MODEL	SUL181h
CONTACT CAPACITY	AC220V 16A
FULL TIMING RANGE	24h
CONTACT RESISTANGE	≤50mΩ
INSULATION RESISTANCE	≥100mΩ
COIL VOLTAGE	220V AC
LIFE	ELECTRICAL	10^7times
MECHANICAL	10^5times
OPERATING TEMPERATURE	-40℃～＋55℃
STO NAGE BATTERY	time 150h
SET UP TIMES	30 m/per times 48 times
REMARKS	-

Frequently asked questions about the SUL181h Timer

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.