140MT-C3E | Surge Suppressor Module for 100-240V AC Coils
140MT-C3E RC surge suppressor / varistor module. For Bulletin 100-C/140M contactors 24-500A, 100-240V AC coil protection, clips onto coil terminals.
Product Overview
The 140MT-C3E is a surge protective device (RC snubber / varistor module) designed to be clipped directly onto the coil terminals of Bulletin 100-C (IEC) and 140M (Motor Protector) contactors in the 24–500 A frame size range. It suppresses voltage spikes (inductive kickback) generated when the contactor coil is de-energized, protecting adjacent solid-state outputs (PLC transistors, SSRs) and extending contactor life. This variant is rated for 100–240 V AC coil voltages.
Technical Specifications (Electrical & Performance)
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Parameter
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Specification
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Catalog Number
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140MT-C3E
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Product Type
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Surge Suppressor Module (RC / Varistor Type)
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Compatible Devices
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Bulletin 100-C (24–500 A) & 140M Motor Protectors
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Rated Coil Voltage Range
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100 … 240 V AC (50/60 Hz)
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Suppression Type
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Metal Oxide Varistor (MOV) — absorbs transient energy on coil drop-out
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Max. Continuous Voltage (MCOV)
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~320 V AC (typical for 240V AC coil MOV)
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Energy Absorption
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Matched to contactor coil inductance (per AB publication 100-C/T datasheet)
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Response Time
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< 1 ns (typical MOV characteristic)
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Mounting
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Snap-on to Contactor Coil Terminals (A1/A2) — no wiring required
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Technical Specifications (Mechanical & Environmental)
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Parameter
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Specification
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Attachment Method
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Integrated spring clip — snaps onto contactor top (A1/A2 terminal block area)
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Housing Material
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Self-extinguishing Thermoplastic (UL 94 V-0)
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Operating Temperature
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-25 … +60 °C
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Standards / Approvals
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UL Listed, CSA Certified, CE, RoHS
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Weight (Approx.)
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~15 g
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Note
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Not for use on DC coil contactors — see 140MT-C3D (24V DC) or 140MT-C3F (380-480V AC)
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Key Features
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Tool-Free Installation: Snaps directly onto the contactor's coil terminal block — no extra wiring, DIN rail space, or fly-lead required.
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Coil-Specific Voltage Match: The -C3E is optimized for 100–240V AC coils; using the correct voltage version ensures proper clamping without overheating.
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Protects Control Electronics: Prevents high-voltage inductive spikes from damaging PLC transistor outputs or causing nuisance EMI in sensitive circuits.
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Seamless Integration: Low-profile design does not interfere with top-mounted auxiliary contact blocks (CA5/CA7 series) on compatible 100-C contactors.
Applications
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PLC-Controlled Contactor Banks: Protecting solid-state PLC outputs (sourcing/sinking) that switch 120/230V AC contactor coils.
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Retrofit Surge Protection: Adding coil suppression to existing 100-C / 140M installations where no suppressor was originally fitted.
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Reduced EMI: Minimizing electrical noise on the control circuit that could affect neighboring low-voltage electronics.
Note: For 24V DC coil contactors use 140MT-C3D (diode module — must observe polarity), for 380–480V AC coils use 140MT-C3F, and for 480–600V AC use 140MT-C3G. Installing the wrong voltage suppressor can result in overheating (undersized MOV) or insufficient spike suppression (oversized). Verify your contactor coil voltage marking before ordering.
About ACH
Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.
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Frequently Ask & Questions
Are preferential prices available?
Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.
Are the Products Genuine OEM Units?
Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.
How will you arrange shipment?
We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.
What is the warranty of goods?
One-year Warranty.
How long is the logistics cycle of the product?
Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.
