Eaton MTL5544D
Product Overview
This blue module is an isolated safety barrier within Eaton’s MTL5500 series. The complete model number is MTL5544D. Words marked “Repeater Power Supply” on the housing tell you its role: a repeater power supply.
When we talk about Eaton’s MTL5500 range, the MTL5544D stands out as one of the most practical repeater power safety barriers in the lineup. It is built specifically for hazardous working conditions like chemical and petrochemical sites, where flammable and explosive gases exist.
Eaton MTL5544D actual photo, product packaging picture

This blue module is an isolated safety barrier within Eaton’s MTL5500 series. The complete model number is MTL5544D. Words marked “Repeater Power Supply” on the housing tell you its role: a repeater power supply.

Take a look at this fresh batch of inventory we just received! Eaton MTL5544D Repeater Power Supplies, all in original packaging and neatly stacked.
♦This model is an absolute superstar in the chemical and petrochemical industries. It’s consistently one of our top sellers—clients love it, and it flies off the shelves.
Eaton MTL Series
| MTL5544D | 1 In / 2 Out | Standard version, HART supported. | 2/3-wire transmitters. |
| MTL4544D | 1 In / 2 Out | Parallel version, same function. | Direct replacement for 5544D. |
| MTL5544 | 2 In / 2 Out | Dual-channel basic version. | Saving cabinet space. |
| MTL5544S | 2 In / 2 Out | Dual-channel, Current Sink output. | Specific DCS input cards. |
| MTL5544A/AS | 1 or 2 In | No power supply for field. | 4-wire transmitters. |
| MTL5575 | 1 In / 2 Out | HART pass-through for 4-wire. | 4-wire smart transmitters. |
⚡ Eaton MTL5544D Key Specifications
Channels: 1 In / 2 Out (1 input, 2 independent outputs)
Signal: 4-20mA, HART supported (2-wire transmitters only)
Power Supply: 20-35V DC
Safety & Approvals: Zone 0, SIL 2/3 certified
To sum up: It works as a 1-in 2-out isolated safety barrier. It supplies power to instruments inside hazardous zones, isolates signals and replicates the current signal.
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