eTM1003 Compliance Testing Guide: IEC 61010-1, IEC 61326-1 & FCC Class B RFQ Checklist

Why Compliance Planning Matters for 100 V / 3 A DC Power Supplies

For system integrators, panel builders, electrical engineers, and procurement teams, a compact DC power supply is often treated as a component. In real projects, however, it behaves like a compliance-sensitive subsystem. It connects to AC mains, powers customer electronics, sits near measurement lines, and may be operated by technicians in production or laboratory environments. That makes supplier selection a BoFu decision: the question is not only “Does it output 100 V?” but “Can this product fit our safety file, EMC plan, assembly layout, and final customer documentation?”

The eTM1003 family gives project teams a focused 100 V / 3 A / 300 W option for DC test power, board validation, mobile device service benches, small equipment test fixtures, and engineering labs. TPS can provide the standard eTM1003, the higher-display-resolution eTM1003F, and the programmable eTM1003P as part of a broader project discussion, including model selection, documentation requests, and integration guidance. The most efficient RFQ packages usually clarify application voltage range, operating duty cycle, communication expectations, installation environment, target market, and required evidence before quoting begins.

For compliance planning, IEC 61010-1 is relevant when the supply is used with measurement, control, or laboratory equipment. IEC 61326-1 is relevant when EMC requirements for measurement, control, and laboratory equipment must be addressed. FCC Part 15 Subpart B becomes important for US projects involving unintentional radiators and digital devices, especially where Class B limits are preferred to reduce market and installation risk. These standards do not replace project-level testing, but they help engineers define the acceptance logic and evidence package expected from a supplier.

How IEC 61010-1, IEC 61326-1, and FCC Class B Fit the RFQ

IEC 61010-1 covers general safety requirements for electrical equipment intended for measurement, control, and laboratory use. For a DC power supply project, the standard helps teams think through hazards such as accessible parts, protective bonding, thermal behavior, abnormal operation, markings, and instructions. In an RFQ, this becomes a request for safety-related documentation, nameplate information, user instructions, protective earth guidance, fuse or input protection information, and any limits that affect installation.

IEC 61326-1 addresses EMC requirements for measurement, control, and laboratory electrical equipment. For practical projects, it should trigger questions about conducted emissions, radiated emissions, electrostatic discharge, EFT, surge, voltage dips, and immunity behavior in the final assembly. The power supply alone is not the complete system; cable routing, grounding, enclosure openings, input filtering, load characteristics, and communication cables can all change the EMC result. This is why TPS encourages customers to discuss the complete use case instead of only sending a model number.

FCC Part 15 Subpart B applies to unintentional radiators in the US market. Class B limits are often preferred when equipment may operate in light industrial, commercial, educational, service, or mixed-use areas where stricter emissions control helps reduce installation risk. Even when a component-level supply is selected carefully, the final product or test station may still need system-level confirmation. RFQ documents should therefore define whether the project needs supplier documentation for component screening, pre-compliance guidance, or support for final system evidence.

For official reference, project teams can review the IEC overview pages for IEC 61010-1 and IEC 61326-1, plus the official eCFR text for 47 CFR Part 15 Subpart B. In addition, TPS has related practical resources on industrial power supply compliance selection, when an EMC pre-compliance lab is needed, and electrical safety checks before certification.

Selecting eTM1003, eTM1003F, or eTM1003P

The three target models share the same core output class: 0-100 V, 0-3 A, and 300 W. They also share the compact desktop form factor used across the eTM small-chassis family. For engineering buyers, the decision is usually driven by display resolution, operating workflow, and whether the power supply must be controlled or programmed as part of a repeatable test sequence.

For procurement, the practical difference is quote clarity. If the application is a technician-operated bench, the standard eTM1003 or eTM1003F may be sufficient. If the application is a repeatable fixture, the eTM1003P programmable DC power supply can reduce operator variation and simplify validation records. If the project may later scale from engineering samples to production benches, ask TPS to review whether the programmable version should be quoted from the start or reserved as an upgrade path.

Integration and Pre-Compliance Testing Considerations

Safety and Installation Details

Before placing the unit into a bench, cabinet, or portable test station, engineers should confirm how AC input selection, protective earth, fuse access, ventilation, output terminals, and load wiring will be managed. The eTM small-chassis form factor uses a rear fan and AC inlet area, so enclosure clearance and airflow should be considered in any custom rack, cart, or panelized installation. If the supply is not used as a standalone desktop instrument, the final assembly may need additional guarding, labeling, or instructions.

EMC, Cabling, and Grounding

EMC performance is strongly influenced by the customer system. Long output leads, poorly bonded metalwork, unshielded communication cables, ground loops, and high dI/dt loads can create emissions or immunity problems that are not visible in a simple bench trial. During RFQ, identify whether the eTM unit will sit near sensitive analog measurement circuits, wireless devices, motor drives, switching loads, or USB/RS485/RS232 communication paths. TPS can help customers review power supply selection in relation to the system architecture and can direct teams to practical resources such as EMC testing for typical power supplies, conducted emissions setup mistakes, and grounding and bonding failure modes.

Programmable Test Sequences

For validation and production checks, the programmable eTM1003P is the stronger candidate when the user needs sequence output, stored parameters, and software-driven settings. Typical examples include power ramp testing, DUT startup checks, current-limit verification, aging cycles, and repeated functional tests. A clear RFQ should define the number of sequence steps, dwell times, expected control interface, logging method, and whether the final station must generate traceable test records.

RFQ Checklist for Engineering and Procurement

A strong RFQ reduces back-and-forth and helps TPS recommend the correct product or equivalent solution quickly. It also helps procurement compare offers on technical evidence, not only unit price. For eTM1003-class projects, include the following items when contacting TPS:

• Target model and use case: Specify whether you are considering eTM1003, eTM1003F, or eTM1003P, and describe whether it is for a bench, rack, cabinet, cart, laboratory instrument, or production test fixture.
• Electrical requirement: Confirm output voltage range, current range, maximum power, load type, transient behavior, duty cycle, ripple sensitivity, and whether constant-voltage or constant-current operation dominates.
• Compliance target: State whether the project needs planning support for IEC 61010-1, IEC 61326-1, FCC Part 15 Subpart B Class B, or a customer-specific compliance matrix.
• Integration details: Provide enclosure type, airflow limitations, cable lengths, communication interface expectations, input voltage configuration, grounding strategy, and surrounding noise sources.
• Documentation needs: Ask for datasheet, user instructions, labeling information, available declarations or test summaries, and any documents required by the final customer or inspector.
• Commercial needs: Include project quantity, target delivery schedule, region of use, packaging preference, sample approval process, and whether customization or private project support is needed.

If the final application is a control panel or customer-facing equipment, also review TPS resources on factory acceptance test records, wire labeling best practices, and documentation and markings that prevent inspection delays. These resources help teams turn a component purchase into an audit-ready project package.

How TPS Supports Global B2B Projects

TPS ELECTRIC supports global B2B customers that need reliable power products, project-level selection support, and practical compliance discussions. For the eTM1003 family, TPS can help identify whether the buyer needs a standard bench supply, a 4-digit display version, or a programmable unit for repeatable test sequences. TPS can also support discussions around equivalent solutions, custom integration, documentation expectations, and how the supply will be used in the customer’s final equipment or test environment.

This matters because many RFQ delays are caused by incomplete assumptions: the buyer asks for a 100 V / 3 A supply, the supplier quotes a part number, and only later does the project team discover that the final customer expects Class B emissions planning, IEC 61010-1 safety documentation, or a repeatable programmable test routine. A better process is to bring TPS into the selection stage with the compliance target, installation details, and evidence requirements clearly stated.

To start the discussion, review the target product pages for eTM1003, eTM1003F, and eTM1003P, then send TPS your application notes, quantity estimate, region of use, and documentation checklist. For teams building broader compliance programs, the related TPS guide on repeatable compliance and documentation for integrated power systems is also a useful next read.

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