Eaton Overload Relay – 1NO + 1NC, 2.4 → 4 A F.L.C, 4 A Contact Rating, 6 W, 500 Vac
- RS Stock No.:
- 4930387
- Mfr. Prt No.:
- 278438 ZB12-4
- Brand:
- Eaton
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
EU Directives 2011/65/EU and 2015/863 restrict the use of the 10 substances below in the manufacture of specified types of electrical equipment.
Whilst this restriction does not legally apply to components, it is recognised that component “compliance” is relevant to many customers.
RS definition of RoHS Compliance:
- The product does not contain any of the restricted substances in concentrations and applications banned by the Directive,
- and for components, the product is capable of being worked on at the higher temperatures required by lead–free soldering
The restricted substances and maximum allowed concentrations in the homogenous material are, by weight:
| Substance | Concentration |
| Lead | 0.1% |
| Mercury | 0.1% |
| PBB (Polybrominated Biphenyls) | 0.1% |
| PBDE ( Polybrominated Diphenyl Ethers) | 0.1% |
| Hexavalent Chromium | 0.1% |
| Cadmium | 0.01% |
| DEHP (Bis (2-Ethylhexl) phthalate) | 0.1% |
| BBP (Benzyl butyl phthalate) | 0.1% |
| DBP (Dibutyl phthalate) | 0.1% |
| DIBP (Diisobutyl phthalate) | 0.1% |
The supplier of the item listed below has informed RS Components that the product is "RoHS Compliant".
RS Components has taken all reasonable steps to confirm this statement. Information relates only to products sold on or after the date of this certificate.
| RS stock number | 4930387 |
| Product description | Eaton Overload Relay - 1NO + 1NC, 2.4 → 4 A F.L.C, 4 A Contact Rating, 6 W, 500 Vac |
| Manufacturer / Brand | Eaton |
| Manufacturer part number | 278438 ZB12-4 |
RS Components Ltd, Birchington Road, Corby, Northants, NN17 9RS, UK
Statement of Conformity
This statement confirms that the product detailed below complies with the specifications currently published in the RS media and has been subject to the strict quality conditions imposed by RS Components’ internal management systems. Furthermore and where applicable, it confirms that all relevant semiconductor devices have been handled and packed under conditions that meet the administrative and technical requirements of ANSI/ESD S20.20 and EN61340-5-1 electrostatics control standards.
| RS stock number | 4930387 |
| Product description | Eaton Overload Relay - 1NO + 1NC, 2.4 → 4 A F.L.C, 4 A Contact Rating, 6 W, 500 Vac |
| Manufacturer / Brand | Eaton |
| Manufacturer part number | 278438 ZB12-4 |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Dec 26, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Country of Origin: DE
Product Details
Eaton Contactor Overload Relay – ZB Series Thermal Overload Relays
The Eaton ZB series thermal overload relay with direct contactor mounting offers reliable motor protection and control in the event of a single-phase failure or overload within a multitude of environments. The auxiliary contacts disconnect the contactor and signal the fault when it overloads, meaning a reset can then take place. It works by cutting off the current to the motor when a high current situation occurs. As the relay receives the corresponding signal, it trips.
This Eaton product is predominantly designed for imitating the heating prototypes that are a staple for keeping your motor circuits healthy, which increases the motor lifetime. It provides an affordable and efficient way for you to protect your motors, whilst giving you peace of mind that you have sufficient motor protection and control.
Eaton’s ZB series overload relays offer reliable and high-quality electric motor control within a multitude of automation and control environments. The ZB series overload relays come with a 500 V ac control voltage, a contact voltage rating of up to 1000 V ac, a temperature range of -5 to +55 °C and 2 auxiliary contact points. Eaton offer a wide range of reliable contactor overload relays to protect machinery from overheating, keeping your business and its operations accessible. All Eaton ZB thermal overload relays can also be used for protecting EEx e motors whilst being an effective and sustainable way for you to protect your motors.
Features and Benefits
• Protects equipment against phase failure or electrical overload.
• Short circuit protection when fitted directly to a contact.
• Modular relay design for use with the DILM contactor range
• 1NO/1NC Auxiliary contacts
• Bimetallic tripping mechanism with trip response from 2 to 10 seconds
• Suitable for protection of Atex motors.
• Single phase failure sensitivity to IEC/EN 60947.
• Manual and automatic reset options.
• Class 10 A overload
When fitting overload relay remote from contactor or using more than one overload relay, use remote mounting base (stock no. 493-0488 - ZB32 only, stock no. 513-0336 - ZB65 only). Note: ZB12 have 5 pins, ZB32 have 4 pins.
Specifications
| Attribute | Value |
| Brand | Eaton |
| FLC Motor Rating | 2.4 → 4 A |
| Contact Current Rating | 4 A |
| Minimum Operating Temperature | -5 °C |
| Number Of Auxiliary Contacts | 2 |
| Reset Method | Automatic, Manual |
| Normal State Configuration | 1NO + 1NC |
| Series | ZB |
| Contact Voltage Rating | 690 V ac |
| Control Voltage | 500 Vac |
| Power Rating | 6 W |
| Mounting Style | Direct Contactor |
| Depth | 88 mm |
| Length | 120 mm |
| Width | 45 mm |
| Operating Temperature Range | -5 → +55 °C |
| Terminal Type | Screw |
| Maximum Operating Temperature | +55 °C |
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