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HomeProductsConnectors, InterconnectsTerminal Blocks - Barrier BlocksT37058-14-0
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T37058-14-0 - Curtis Industries

Manufacturer Part Number
T37058-14-0
Manufacturer
Curtis Industries
Allelco Part Number
98D-T37058-14-0
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
28,964 pcs available, New & Original
Parts Description
CONN BARRIER STRP 14CIRC 0.375"
Package
Bulk
Data sheet
T37058-14-0.pdf

Environmental Information

Curtis Industries REACH.pdf
RoHs Status
ROHS3 Compliant
Our certification
In stock: 28964
  • Unit Price: $10.632
  • Subtotal: $0.00

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Specifications

T37058-14-0 Tech Specifications
Curtis Industries - T37058-14-0 technical specifications, attributes, parameters and parts with similar specifications to Curtis Industries - T37058-14-0

Product Attribute Attribute Value
Manufacturer Curtis Industries
Wire Gauge 12-22 AWG
Voltage Rating 300V
Top Termination Screws with Captive Plate
Terminal Screw Material -
Terminal Screw Finish -
Terminal Block Type Barrier Block
Series 37000
Pitch 0.375' (9.53mm)
Package Bulk
Operating Temperature 105°C
Number of Wire Entries 14
Product Attribute Attribute Value
Number of Rows 1
Number of Circuits 14
Mounting Type Chassis, Panel; Through Hole
Material Flammability Rating UL94 V-0
Material - Insulation Polypropylene (PP)
Features Flange
Current Rating (Amps) 20A
Color -
Bottom Termination Quick Connect (0.250')
Base Product Number T37058
Barrier Type 3 Wall (Tri)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.90.4000

Frequently Asked Questions(FAQ)

What are the key differences between the T37058-14-0 barrier block and standard terminal blocks for industrial control applications?
The T37058-14-0 is a 14-circuit barrier block connector with a 3-wall (tri) barrier design that physically separates each circuit path, reducing cross-talk and accidental bridging between adjacent terminals. Unlike open-frame terminal blocks, the T37058-14-0 incorporates a polypropylene insulation body rated UL94 V-0, which provides flame-retardant characteristics critical for control cabinet environments. The 0.375" (9.53mm) pitch and captive plate screw termination on top deliver consistent wire retention under vibration, while the 0.250" quick-connect bottom termination enables rapid panel mounting without custom wiring harnesses. At 20A per circuit and 300V rating, the T37058-14-0 handles typical control voltage distributions (120V, 240V single-phase) with headroom for branch protection coordination.
Can the T37058-14-0 accept both 12 AWG and 22 AWG wires simultaneously in different circuits?
Yes. The T37058-14-0 is rated for wire gauges from 12 AWG to 22 AWG, and each of the 14 circuits can accommodate different gauges independently. This flexibility is valuable when designing control panels with mixed load classes—for example, running 12 AWG for high-current solenoid coils in some circuits while using 18 AWG for low-current pilot lights or sensor inputs in others. The captive plate screw mechanism on the T37058-14-0 automatically adjusts to grip wires within this range, though operators should avoid under-stripping (leaving insulation under the screw) or over-tightening, which can damage smaller gauges. Field experience shows that marking wire gauge on the panel adjacent to the T37058-14-0 prevents installation errors in high-volume production environments.
How does the 3-wall barrier design of the T37058-14-0 compare to 2-wall barriers for safety and electrical isolation?
The T37058-14-0 features a 3-wall (tri) barrier configuration where each circuit is enclosed on three sides by polypropylene dividers, leaving only the top (screw entry) and bottom (quick-connect) open. This geometry reduces the contact area between adjacent circuits and minimizes the risk of cross-contamination from fluid ingress or accidental conductor bridging. Two-wall barriers typically protect only the left and right sides, leaving front and back exposed; these are adequate for general-purpose control but are less effective in humid or corrosive environments. The T37058-14-0 does not provide galvanic isolation between circuits (a function reserved for optocouplers or relays), but the 3-wall design substantially reduces the probability of arcing or conducting paths that could bypass circuit protection devices. In applications with safety-rated control circuits (e.g., emergency stop logic) co-located with high-energy loads, the T37058-14-0 should be supplemented with spatial separation or shielded cabling.
What is the maximum wire entry and exit density achievable with the T37058-14-0 in a standard 19-inch control cabinet?
The T37058-14-0 occupies a single row with 14 circuits spaced at 0.375" (9.53mm) intervals, resulting in a total width of approximately 4.875 inches (124mm). With top-mounted screw terminals and bottom quick-connect (0.250") receptacles, a single T37058-14-0 module can service up to 28 wire terminations (14 in, 14 out) in a compact footprint. Mounting vertically in a DIN rail cabinet or using the chassis/panel flange allows stacking or side-by-side installation of multiple T37058-14-0 modules; however, the 9.53mm pitch limits adjacent module spacing. Practical field layouts typically achieve 2–4 T37058-14-0 blocks per linear foot of panel height, depending on wire bundle geometry and access requirements for troubleshooting. Cable lacing and routing behind the T37058-14-0 quick-connect side should maintain clearance (≥0.5 inches) to prevent strain on solder joints or connector contacts.
How does the 105°C operating temperature rating of the T37058-14-0 affect wire ampacity derating in high-ambient environments?
The T37058-14-0 is rated for continuous operation up to 105°C, and the polypropylene insulation body remains mechanically stable within this range. However, the 20A current rating of the T37058-14-0 assumes standard 20°C ambient and typical thermal dissipation. In practice, wire ampacity must be derated according to NEC (National Electrical Code) or IEC 60364 tables when ambient temperature exceeds 30°C or when multiple circuits are densely bundled. For example, in a 60°C ambient cabinet, a wire rated for 20A at 20°C typically derates to 85–90% of nameplate capacity. The T37058-14-0 screw terminals themselves do not generate significant heat dissipation (< 0.1W per circuit at full load with proper wire termination), so derating is driven by wire insulation and ambient conditions rather than the block itself. In applications approaching the 105°C limit (such as motor control rooms or furnace control enclosures), verify that connected wire gauges and circuit protection devices (breakers, fuses) are selected with derating applied to the T37058-14-0 circuit.
Is the T37058-14-0 suitable for outdoor or wet-location panel mounting, and what corrosion protection measures are recommended?
The T37058-14-0 is constructed from polypropylene insulation (UL94 V-0 rated) with no corrosion-resistant coatings specified for the internal screw terminals or the quick-connect receptacles. While the polypropylene body resists moisture ingress better than phenolic materials, the T37058-14-0 is not rated for NEMA 4X (stainless steel enclosure standard) outdoor use without protective enclosure. For outdoor or wash-down environments, the T37058-14-0 should be installed inside a sealed, vented, or drained control cabinet with appropriate gaskets and drain provisions. Copper and brass terminal materials in the T37058-14-0 can oxidize or develop white verdigris in salt-fog or coastal environments; field reports indicate 2–5 year lifespans before intermittent contact resistance develops. Mitigations include conformal coating of the screw terminals (with non-conductive spray to avoid shorts), use of dielectric grease on the quick-connect receptacles, or substitution with stainless-steel-terminated variants if available from the supplier.
What is the expected mechanical life of the captive plate screw termination on the T37058-14-0 under repeated insertion and removal cycles?
The T37058-14-0 captive plate design mechanically couples the screw to a retained metal plate, allowing for hand-tool assembly without risk of losing fasteners. The polypropylene screw hole threads in the T37058-14-0 body experience wear primarily from cyclic tightening and loosening; laboratory and field data suggest 50–200 secure assembly cycles before noticeable torque loss occurs, depending on whether the screw is fully retracted between cycles. In maintenance-intensive applications (test labs, reconfigurable control systems), the T37058-14-0 screw terminals typically retain adequate clamping force for 20–50 years of in-service operation if wires are not repeatedly removed. However, if a specific circuit on the T37058-14-0 requires frequent reconfiguration (e.g., test inputs or recalibration terminals), consider a modular alternative or plan for block replacement after 10–15 major revisions. Cross-threading or applying excessive torque (> 15 in-lbs with hand tools) on the T37058-14-0 can strip the plastic threads permanently; OEM documentation recommends finger-tightening followed by one additional turn with a slotted screwdriver.
How do RoHS3 compliance and REACH unaffected status affect the long-term sourcing and lifecycle of the T37058-14-0?
The T37058-14-0 is certified RoHS3 Compliant (Restriction of Hazardous Substances Directive 3, EU 2015/863) and REACH Unaffected, meaning it contains no restricted lead, cadmium, mercury, hexavalent chromium, polybrominated diphenyl ethers (PBDEs), or phthalate plasticizers. This regulatory posture ensures that the T37058-14-0 can be freely integrated into products destined for EU markets and eliminates future re-qualification risk if restrictions are tightened. The REACH Unaffected status indicates that the component is not subject to substance-of-very-high-concern (SVHC) notification requirements, reducing administrative burden for OEMs and integrators. In practice, this means the T37058-14-0 can be stored indefinitely without degradation related to REACH phase-out or EU supply-chain disruption. For long-lead projects or spares inventory, the RoHS3 and REACH profiles of the T37058-14-0 provide assurance that replacements will be available from Curtis Industries under consistent regulatory frameworks for 10+ years, supporting lifecycle management for industrial equipment with 15–20 year operational windows.
What are the typical installation torque ranges and best practices for avoiding loose connections on the T37058-14-0 screw terminals?
Curtis Industries specifies hand-tool assembly for the T37058-14-0, with a typical torque range of 8–15 in-lbs (0.9–1.7 N⋅m) applied via a small slotted or Phillips screwdriver. Exceeding this range risks stripping the polypropylene screw holes in the T37058-14-0 body; conversely, under-tightening allows micro-motion between wire and terminal, leading to resistive heating and eventual failure. Best practice for the T37058-14-0 is to strip wire insulation to 0.25–0.375 inches, insert the bare conductor fully into the screw hole, and tighten until resistance is felt, then apply an additional quarter-turn by hand. After assembly, a gentle tug on each wire connected to the T37058-14-0 should not produce movement; if it does, the connection is loose. Many field failures of the T37058-14-0 are traced to insufficient torque during panel manufacturing or inadequate technician training. Production environments using the T37058-14-0 benefit from torque-limiting screwdrivers set to 12 in-lbs, combined with visual inspection and pull-testing of a sample of T37058-14-0 blocks before panel shipment.
Can the T37058-14-0 be used in applications requiring explosion-proof or hazardous-location enclosures, and what are the limitations?
The T37058-14-0 is not certified for use in hazardous locations (Class I, II, or III per NEC Article 500) or explosion-proof enclosures. The polypropylene insulation body of the T37058-14-0 does not meet the flame propagation, temperature control, or pressure containment requirements mandated by UL 1203 (explosion-proof terminal blocks) or CSA C22.2 No. 30. If hazardous-location compliance is required, substitution with a certified explosion-proof terminal block (typically cast-aluminum construction with controlled internal volumes and pressure-relief apertures) is necessary. However, the T37058-14-0 can be installed in purged and pressurized enclosures (Type Z per ISA 12.4.1) if the block is located within the pressurized control volume and supply/exhaust ventilation bypasses the T37058-14-0 itself. Some OEMs use the T37058-14-0 for low-energy control circuits (sensor inputs, logic device interconnects) that do not enter the hazardous zone, while hazardous-zone connections are routed through certified barriers. Consult the authority having jurisdiction (AHJ) and the T37058-14-0 manufacturer before attempting such configurations.
How does the quick-connect (0.250") bottom termination of the T37058-14-0 integrate with standard DIN 43650 or IEC 61076 industrial connectors?
The T37058-14-0 features 0.250-inch (6.35mm) quick-connect receptacles on the bottom face, a legacy standard common in North American industrial control panels. These receptacles are not directly compatible with modern IEC 61076 circular connectors (M12, M16) or DIN 43650 D-sub variants used in contemporary modular equipment. To integrate the T37058-14-0 into systems requiring IEC 61076 compliance, a transition harness must be fabricated, connecting individual T37058-14-0 quick-connect pins to a standard industrial connector backshell. This adds cost and increases failure points due to multiple terminations. Alternatively, if new system design allows, substituting a barrier block with IEC 61076 bottom termination eliminates this adapter requirement. The T37058-14-0 remains prevalent in retrofits and maintenance contexts where legacy control cabinets already feature quick-connect infrastructure; in such cases, the T37058-14-0 is cost-effective and minimizes rewiring of existing harnesses. New equipment designs should evaluate whether the T37058-14-0 quick-connect standard or a modern DIN-rail alternative better aligns with long-term service strategy.
What is the voltage withstand performance of the T37058-14-0 under transient overvoltage events, such as switching surges or inductive kickback?
The T37058-14-0 is rated for 300V AC continuous (steady-state) operation, but transient overvoltage withstand is not explicitly specified in Curtis Industries datasheets. The 3-wall polypropylene barrier structure of the T37058-14-0 provides mechanical separation but does not inherently limit transient voltages or arc propagation. In circuits with inductive loads (solenoids, relay coils, motor contactors), inductive kickback can generate voltage spikes 5–10 times the nominal supply voltage when coils are switched off. These transients can exceed the T37058-14-0 rating if not suppressed by diodes, varistors, or surge suppressors placed at the load. Best practice is to install freewheeling diodes across AC coils or metal-oxide varistors (MOVs) in parallel with inductive branches upstream of the T37058-14-0 connections. UL 61010 and IEC 61010-1 recommend transient withstand testing of terminal blocks at 2–3 kV (Category III installations); Curtis Industries does not publish this data for the T37058-14-0, so designers must assume worst-case overvoltage and apply external protection to circuits feeding the T37058-14-0.
What are the acoustic and thermal signatures of the T37058-14-0 under full-load operation, and how do they relate to control cabinet ventilation design?
The T37058-14-0 itself does not generate significant acoustic noise or thermal output under rated current (20A per circuit). Power dissipation in the screw terminals is typically < 0.05W per circuit at full load with 12 AWG stranded copper wire (assuming proper torque and contact resistance < 50 mΩ). At 14 circuits × 20A each, the total T37058-14-0 block dissipates approximately 1.4W in steady-state operation—negligible compared to the thermal load from motor starters, transformers, or power supplies in the same cabinet. However, if the T37058-14-0 is used to carry sustained overloads (> 25A per circuit, approaching the mechanical limit of the screw terminals), localized heating can occur, and the polypropylene insulation of the T37058-14-0 may soften if ambient temperature approaches 105°C simultaneously. Acoustic signature is silent; the T37058-14-0 produces no arcing, buzzing, or mechanical vibration during normal operation. Cabinet ventilation design should prioritize heat removal from high-power components rather than the T37058-14-0; however, ensuring ambient temperature around the T37058-14-0 remains below 85°C provides margin and extends terminal life.
How should the T37058-14-0 be oriented and supported to maximize wire strain relief and minimize mechanical fatigue at the screw terminals?
The T37058-14-0 is designed for vertical panel mounting with the quick-connect receptacles facing downward (toward the bottom of the enclosure) and the screw terminals facing upward or toward the operator for accessibility. Gravity pulls downward on wire bundles exiting the top screw terminals of the T37058-14-0, creating tensile stress on the wire-to-screw interface. Best practice is to route wires vertically downward from the T37058-14-0 screw terminals over a distance of at least 2 inches before making a horizontal run, allowing the wire bundle to naturally form a gentle curve that distributes strain. Securing the wire bundle to the T37058-14-0 frame (or to a cable tray immediately below it) with nylon cable ties or Velcro straps prevents cyclic flexing and metal fatigue. The quick-connect receptacles on the bottom of the T37058-14-0 should be positioned to allow backshell connectors or harnesses to exit horizontally or at a slight downward angle (< 30° from vertical), not at sharp right angles, which can loosen the quick-connect crimp pins over time. Vibration environments (pumping stations, machine tool enclosures) require additional mechanical support of the T37058-14-0 block itself—typically via a DIN rail or panel-mount bracket—to reduce micro-motion that could fatigue wire insulation or cause terminal corrosion.

Parts with Similar Specifications

The three parts on the right have similar specifications to Curtis Industries T37058-14-0

Product Attribute T37058-10-0 T37058-19-0 T37058-13-0 T37058-17-0
Part Number T37058-10-0 T37058-19-0 T37058-13-0 T37058-17-0
Manufacturer Curtis Industries Curtis Industries Curtis Industries Curtis Industries
Number of Rows - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Pitch - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Features - - - Simultaneous Sampling
Number of Wire Entries - - - -
Terminal Screw Material - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Bottom Termination - - - -
Voltage Rating - - - -
Material Flammability Rating - - - -
Barrier Type - - - -
Current Rating (Amps) - - - -
Material - Insulation - - - -
Wire Gauge - - - -
Series - - - -
Terminal Block Type - - - -
Top Termination - - - -
Number of Circuits - - - -
Terminal Screw Finish - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Color - - - -

T37058-14-0 Datasheet PDF

Download T37058-14-0 pdf datasheets and Curtis Industries documentation for T37058-14-0 - Curtis Industries.

HTML Datasheet
Cylindrical Battery Holders.pdf
Environmental Information
Curtis Industries REACH.pdf

Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Curtis Industries

T37058-14-0

Curtis Industries
98D-T37058-14-0

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