MTL Instruments MTL5553 Zener Barrier Isolator Power Supply | Replacement, Equivalent & Selection Guide
The MTL Instruments MTL5553 is a DIN-rail-mounted Zener barrier isolator power supply engineered for intrinsically safe (IS) circuits in hazardous area installations. It delivers a stable, regulated 24 V DC supply to field-mounted instruments while maintaining the energy limitation mandated by ATEX and IECEx standards. Konmask.com supplies genuine MTL5553 units and verified compatible alternatives for MRO, system integration, and panel-build projects worldwide.
Technical Specifications
- Part Number / SKU: MTL5553
- Manufacturer: MTL Instruments (Eaton MTL)
- Series: MTL5000 Zener Barrier Series
- Function: Isolator / Power Supply for IS circuits
- Output Voltage: 24 V DC (nominal)
- Mounting: DIN rail (TS-35)
- Hazardous Area Certification: ATEX / IECEx — Zone 0, 1, 2 (Gas); Zone 20, 21, 22 (Dust)
- Protection Concept: Intrinsic Safety [Ex ia/ib]
- Operating Temperature: −20 °C to +60 °C
- Weight: 220 g
- Housing: Plug-in module, colour-coded per MTL5000 series convention
- Standards: EN 60079-11, IEC 60079-11
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as direct or functional replacements for the MTL5553. Always verify electrical parameters and certification requirements before substitution.
- MTL4553 — MTL4000 series functional equivalent (galvanic isolator variant)
- MTL5553-SR — MTL factory-designated service replacement
- Pepperl+Fuchs KFD2-STV4-Ex1 — P+F equivalent isolator power supply
- R. Stahl 9160 Series — Comparable Zener barrier power supply
- Turck IM Series — Alternative IS power supply for 24 V field devices
Contact Konmask.com for cross-reference verification and datasheet comparison.
Why Choose the Original MTL5553
- Factory-certified ATEX/IECEx compliance — no re-certification required on replacement
- Plug-in module design enables hot-swap without rewiring the backplane
- Proven reliability in oil & gas, chemical, and pharmaceutical plants globally
- Full traceability and OEM documentation available on request
- Backward compatible with existing MTL5000 series backplanes and termination assemblies
Typical Applications
- Power supply to 2-wire 4–20 mA transmitters in Zone 0/1 hazardous areas
- IS loop power for pressure, temperature, and flow transmitters
- DCS and PLC I/O marshalling panels with intrinsic safety requirements
- Offshore platform and onshore refinery control systems
- Pharmaceutical cleanroom and ATEX-rated process areas
System Compatibility
- DCS Platforms: Honeywell Experion, Emerson DeltaV, ABB 800xA, Yokogawa CENTUM
- PLC Platforms: Siemens S7-300/400/1500, Rockwell ControlLogix, Schneider Modicon
- Backplane: MTL5000 series DIN-rail backplane assemblies
- Field Devices: Any 2-wire IS-rated transmitter drawing ≤ 20 mA at 24 V DC
Selection Guide
Use the checklist below to confirm the MTL5553 is the correct model for your application:
- Need galvanic isolation? → Consider MTL4553 (galvanic isolator series)
- Zone 0 gas atmosphere? → MTL5553 is certified; confirm entity parameters with field device datasheet
- Multiple channels required? → Evaluate MTL5500 multi-channel backplane assemblies
- HART pass-through needed? → MTL5553 is passive-compatible; verify HART transparency with your DCS
- Replacing a failed unit? → MTL5553 is plug-in; no rewiring required if backplane is intact
Quality Assurance & Sourcing
- All MTL5553 units supplied by Konmask.com are sourced from authorised distributors or verified surplus channels
- Each unit undergoes visual inspection and documentation verification before dispatch
- Certificate of conformity and original datasheet provided on request
- Traceability records maintained for MRO and EPC project requirements
How to Order
- Part Number: MTL5553
- Manufacturer: MTL Instruments (Eaton MTL)
- Lead Time: Contact us — ex-stock and short lead-time options available
- Minimum Order: 1 unit
- Enquiry: support@konmask.com | +0086 19859288691
- Quote Request: Include project name, required quantity, and delivery location
Replacement & Compatibility FAQ
Q: Can the MTL4553 replace the MTL5553 directly?
A: The MTL4553 is a galvanic isolator and offers superior noise immunity, but uses a different backplane slot. Confirm mechanical and electrical compatibility before substitution.
Q: Is the MTL5553 still in production?
A: MTL periodically revises its product range. Contact Konmask.com to confirm current production status and available stock.
Q: What certifications does the MTL5553 carry?
A: ATEX and IECEx for intrinsic safety; specific certificate numbers are available on the MTL datasheet provided with each unit.
Q: Can I use the MTL5553 in a Zone 2 area only?
A: Yes — Zone 0/1/2 certified units may be used in Zone 2 without restriction.
Q: Do you supply the MTL5000 backplane separately?
A: Yes. Contact us with your channel count and layout requirements.
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Contact: support@konmask.com | +0086 19859288691
