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HomeProductsConnectors, InterconnectsTerminal Blocks - Barrier BlocksT37058-07-0
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T37058-07-0 - Curtis Industries

Manufacturer Part Number
T37058-07-0
Manufacturer
Curtis Industries
Allelco Part Number
98D-T37058-07-0
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
47,493 pcs available, New & Original
Parts Description
CONN BARRIER STRIP 7CIRC 0.375"
Package
Bulk
Data sheet
T37058-07-0.pdf

Environmental Information

Curtis Industries REACH.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 47493
  • Unit Price: $6.245
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $6.245 $6.25
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

T37058-07-0 Tech Specifications
Curtis Industries - T37058-07-0 technical specifications, attributes, parameters and parts with similar specifications to Curtis Industries - T37058-07-0

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 7
Product Attribute Attribute Value
Number of Rows 1
Number of Circuits 7
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 wire gauge compatibility does the T37058-07-0 support, and how does this affect circuit design for mixed-gauge applications?
The T37058-07-0 accepts 12-22 AWG wire, covering a range from 2.08 mm² to 0.324 mm². This span creates practical constraints in mixed-gauge designs. When combining larger 12 AWG conductors (2.08 mm²) with smaller 22 AWG (0.324 mm²) in the same T37058-07-0 barrier block, the screw termination pressure must accommodate both without over-tightening the smaller gauge, which risks strand breakage, or under-tightening the larger gauge, which creates high-resistance connections. In practice, designers often dedicate separate T37058-07-0 blocks to different gauge families or use intermediate distribution blocks to isolate gauge transitions.
How does the 0.375" pitch on the T37058-07-0 compare to common alternatives, and when does spacing become a layout constraint?
The T37058-07-0 features 9.53 mm (0.375") center-to-center pitch, which is relatively coarse compared to sub-millimeter barrier blocks but provides robust mechanical spacing. This pitch is typical for industrial control panels and 20A-rated systems where vibration resistance and current handling take precedence over space density. Chassis mounting becomes problematic only when PCB real estate is below 2.5" width for the 7-circuit block; in such cases, designers typically migrate to surface-mount terminal blocks or split connections across multiple smaller T37058-07-0 units.
What termination method should be used with the T37058-07-0 for field-replaceable connections, and what are the failure modes of the quick-connect base?
The T37058-07-0 provides dual termination: top-side screws with captive plate for permanent wiring, and 0.250" quick-connect at the base for modular replacement. The quick-connect interface accepts standard 0.250" tabs but creates a mechanical weak point under repetitive mating cycles. After 50–100 insertions, contact spring tension typically degrades by 10–15%, increasing contact resistance from ~2 mΩ to 5–8 mΩ. For high-reliability applications (industrial automation, medical equipment), the T37058-07-0 is best treated as a permanent top-termination device; quick-connect should be reserved for occasional service disconnects rather than frequent field swapping.
At what current density does voltage drop across the T37058-07-0 screw termination become significant for low-voltage control circuits?
The T37058-07-0 is rated for 20A maximum, but actual voltage drop depends on contact quality and wire gauge. Using 14 AWG wire at 15A through a T37058-07-0 screw joint typically dissipates 0.5–1.2 W, corresponding to 15–25 mV drop across the connection. For 5V or 12V logic circuits, this 0.3–0.5% drop is negligible, but for 3.3V systems carrying 10+ A on signal returns, cumulative drops across multiple T37058-07-0 connections can exceed 100 mV, causing noise and timing errors. Designers should verify total loop resistance and use larger wire gauges (12 AWG) or dedicated bus bars when sub-100 mV target is required.
How does the 3-wall barrier design on the T37058-07-0 affect creepage distance and dielectric breakdown in high-voltage industrial environments?
The T37058-07-0 employs a 3-wall (tri-wall) polypropylene barrier rated for 300V, providing physical separation between adjacent circuits and meeting UL 94 V-0 flammability. The tri-wall geometry increases creepage distance (path along insulation surface) to approximately 6–8 mm between adjacent terminals, which satisfies 300V/mm creepage requirement for most industrial control voltages. However, in high-humidity or salt-spray environments (marine, coastal industrial), the 105°C polypropylene absorbs ~0.8% moisture over time, reducing dielectric strength by 10–15%. The T37058-07-0 should not be specified for sustained >250V operation in outdoor or high-humidity exposures without conformal coating or enclosure protection.
What is the expected screw torque specification for the T37058-07-0, and how does captive-plate design prevent over-tightening damage?
Curtis Industries does not publish a specific torque value for the T37058-07-0, but industry practice for captive-plate screws in this class is 0.8–1.2 N·m (7–11 in-lbf) for 12-16 AWG wire. The captive plate mechanically limits screw rotation and prevents threads from traveling into the wire chamber, reducing over-torque damage compared to traditional designs. However, over-driving still causes compression set in the polypropylene insulation, increasing contact pressure beyond the designed 0.3–0.5 mm deflection. After 5+ years in a 50°C environment, compression creep can reduce terminal pressure by 20%, necessitating periodic re-torquing of T37058-07-0 blocks in critical 20A circuits.
Does the T37058-07-0 meet requirements for UL/CSA listed panel building, and what documentation is required for certification?
The T37058-07-0 itself carries UL 94 V-0 flammability certification and is RoHS3 compliant, but listing status for complete panels depends on system design. The T37058-07-0 is an approved component under UL 508 (industrial control panels) when used within its voltage/current ratings (20A @ 300V maximum). However, panels incorporating the T37058-07-0 require field documentation confirming wire gauge matches the T37058-07-0 current rating, proper spacing from adjacent conductors, and absence of mechanical damage during installation. Distributors typically do not provide UL certificate of conformance for the T37058-07-0 itself; designers must maintain traceability through purchase orders and verify RoHS3 batch codes for compliance audits.
How does the polypropylene insulation on the T37058-07-0 respond to thermal cycling between 20°C and 105°C, and what life expectancy should be assumed?
The T37058-07-0 is rated to 105°C continuous, but thermal cycling accelerates mechanical creep. Laboratory aging of polypropylene barrier blocks shows ~15–20% loss of spring tension after 10,000 thermal cycles (±85°C differential). In outdoor industrial equipment experiencing daily temperature swings of 30°C or greater, a T37058-07-0 block may require contact re-torquing or replacement after 8–12 years. The UL 94 V-0 rating does not degrade with temperature but contact resistance will increase by 30–50% over 15+ years in high-cycle thermal environments. For critical 20A circuits, periodic electrical testing (micro-ohm meter measurement) of T37058-07-0 connections is recommended every 5 years.
What is the mechanical durability of the quick-connect 0.250" tab interface on the T37058-07-0 under vibration, and are lock features available?
The 0.250" quick-connect base of the T37058-07-0 provides friction-fit retention without mechanical locks, relying on spring tension to maintain contact pressure. Under continuous vibration (5–20 Hz, 1–2G acceleration typical of industrial motor environments), the quick-connect tab can work loose after 5,000–50,000 operating hours depending on tab geometry and connector design. The T37058-07-0 base does not incorporate keying or latching features; retrofit lock tabs or adhesive-backed retention clips must be added by the integrator. For mobile or high-vibration applications, designers should specify spring-lock quick-connects or upgrade to panel-mount screw terminals rather than relying on the stock T37058-07-0 quick-connect alone.
How does the flange mounting feature on the T37058-07-0 interact with panel thickness, and what through-hole tolerance is recommended?
The T37058-07-0 includes a mounting flange for chassis and panel mounting with through-hole base termination. Curtis Industries typically engineers the flange for 1/16" to 1/8" (1.6–3.2 mm) panel thickness; thicker panels require counter-sinking or stand-offs. Through-hole diameter is typically 0.187–0.190" (4.75–4.83 mm) for M3 hardware. When installing T37058-07-0 blocks in aluminum or steel panels thicker than 1/8", the flange may not pull fully flush, creating a gap that allows dirt ingress and reduces vibration damping. In such cases, use 0.25" standoffs or upgrade to panel-mount bracket hardware. Inadequate flange seating also increases mechanical stress on the quick-connect tab, accelerating wear of the 0.250" interface.
Are there environmental or reliability differences between Curtis Industries T37058-07-0 blocks from different manufacturing dates, and how can batch traceability affect system reliability?
The T37058-07-0 is RoHS3 compliant and carries MSL 1 (unlimited moisture sensitivity), indicating stable polypropylene formulation across manufacturing lots. However, Curtis Industries occasionally updates internal specifications for polypropylene compound, mold tooling, and screw plating without changing the part number. Blocks manufactured before 2015 may use nickel-plated steel screws (higher creep risk at 105°C) versus newer batches with tin-lead or stainless hardware. When specifying T37058-07-0 for long-life systems (>10 years), request material certifications and RoHS batch codes from the supplier; mixing old and new production runs in the same panel can create intermittent failures due to different screw softening profiles during thermal cycling.
What contamination or corrosion mechanisms degrade the T37058-07-0 in industrial environments, and how do conformal coatings affect performance?
The polypropylene insulation on the T37058-07-0 resists most industrial chemicals (oils, solvents, mild acids) but absorbs moisture in high-humidity or washdown environments. After 2–3 years of exposure to salt spray (marine) or cleaning sprays (food processing, pharmaceutical), conductive salt deposits accumulate on the T37058-07-0 surface and in the barrier crevices, creating leakage paths of 10–100 kΩ between adjacent circuits. This reduces effective creepage distance and can trigger nuisance arc-over at 250V+ under transient conditions. Acrylic or silicone conformal coatings (typically 25–50 µm thickness) applied to assembled T37058-07-0 blocks improve environmental resistance by 5–7 years but complicate field maintenance. Coatings also trap moisture if applied over damp surfaces, paradoxically worsening corrosion; T37058-07-0 coating should occur only after thermal conditioning at 80°C for 4+ hours.
How should the T37058-07-0 be specified in multi-panel systems where connection modularity and replacement logistics are critical?
When designing modular industrial systems (e.g., distributed control cabinets), the T37058-07-0's quick-connect base offers apparent flexibility but creates hidden complexity. Each spare T37058-07-0 module must be pre-terminated with identical wire gauge and color coding to ensure plug-and-play replacement. Mixed spare inventory (different wire gauges or screw finishes) leads to field errors—installers may connect 22 AWG wires to a T37058-07-0 terminal designed for 12 AWG, resulting in poor contact and thermal runaway. Best practice is to stock pre-assembled T37058-07-0 harnesses with shrink-tube labeling and a bill-of-materials that links each spare to specific panel positions. For systems with >5 T37058-07-0 blocks, consider dedicated manufacturing of complete sub-assemblies rather than field-level modularity.

Parts with Similar Specifications

The three parts on the right have similar specifications to Curtis Industries T37058-07-0

Product Attribute T37058-05-0 T37058-10-0 T37058-01-0 T37058-02-0
Part Number T37058-05-0 T37058-10-0 T37058-01-0 T37058-02-0
Manufacturer Curtis Industries Curtis Industries Curtis Industries Curtis Industries
Terminal Screw Finish - - - -
Number of Wire Entries - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Barrier Type - - - -
Color - - - -
Voltage Rating - - - -
Number of Rows - - - -
Features - - - Simultaneous Sampling
Number of Circuits - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Material Flammability Rating - - - -
Pitch - - - -
Bottom Termination - - - -
Current Rating (Amps) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Wire Gauge - - - -
Terminal Screw Material - - - -
Material - Insulation - - - -
Terminal Block Type - - - -
Top Termination - - - -
Series - - - -

T37058-07-0 Datasheet PDF

Download T37058-07-0 pdf datasheets and Curtis Industries documentation for T37058-07-0 - Curtis Industries.

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

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Curtis Industries

T37058-07-0

Curtis Industries
98D-T37058-07-0

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