Terminal Box / Connection Head for Heating Jackets

Product Specifications

Technical details and manufacturing context for Terminal Box/Connection Head

Definition

A terminal box, also referred to as a connection head, is a protective enclosure that houses electrical terminals and connections. It serves as the interface between the heating element of a heating jacket and external power or control systems. The primary function is to ensure secure electrical connections while providing environmental protection against dust, moisture, and mechanical impact. The enclosure is typically made from thermoplastic materials such as polycarbonate or ABS, stainless steel, or aluminum alloy, depending on the application requirements. The terminal box may feature screw terminals, quick-connect terminals, or plug connectors to facilitate installation and maintenance. It is designed to accommodate cable entries with thread sizes ranging from M16 to M32, and terminals that accept wire cross-sections from 1.5 to 6 mm². The rated voltage can range from 250 to 690 V AC, and the rated current from 10 to 63 A, depending on the model. The ingress protection rating is typically IP54 to IP65, indicating dust-tight and water-resistant properties. The operating temperature range is -40 to 85°C, and the insulation resistance is at least 100 MΩ at 500 V DC. The terminal box may be constructed from die-cast aluminum alloy ADC12, with an epoxy-polyester surface treatment for corrosion protection. The flame retardant class is UL94 V-0, and the tightening torque for terminal screws is 1.5 to 3.0 N·m. The weight varies from 0.3 to 1.2 kg depending on size. This component is essential for safe and reliable operation of heating jackets in industrial applications. When selecting a terminal box, it is important to verify model-specific parameters and compliance with relevant standards such as IEC 60529, IEC 60068-2, EN 50262, IEC 60947-7-1, GB/T 15115, ISO 12944-6, UL 94, IEC 60947-1, and IEC 60243-1 with the legal manufacturer or supplier.

Working Principle

The terminal box provides a sealed or protected housing for electrical terminals where power cables from the heating element are connected to external wiring. It typically features screw terminals, quick-connect terminals, or plug connectors to facilitate installation and maintenance. The enclosure prevents electrical hazards by insulating live parts and protecting against ingress of dust and water. The design allows for secure mechanical connections and proper strain relief for cables, ensuring reliable operation over the specified temperature range.

Common Materials

Thermoplastic (e.g., polycarbonate, ABS), Stainless steel, Aluminum alloy

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Voltage	250–690 V AC	Max voltage for safe operation
Rated Current	10–63 A	Continuous current capacity
Ingress Protection	IP54–IP65	Dust-tight and water-resistantIEC 60529
Operating Temperature	-40–85 °C	Continuous operation rangeIEC 60068-2
Cable Entry Size	M16–M32 mm	Thread size for cable glandsEN 50262
Terminal Cross-Section	1.5–6 mm²	Wire range for terminalsIEC 60947-7-1
Material	ADC12	Die-cast aluminum alloyGB/T 15115
Surface Treatment	Epoxy–Polyester	Corrosion protectionISO 12944-6
Weight	0.3–1.2 kg	Depends on size
Flame Retardant Class	UL94 V-0	Self-extinguishingUL 94
Tightening Torque	1.5–3.0 N·m	For terminal screwsIEC 60947-1
Insulation Resistance	≥100 MΩ	At 500 V DCIEC 60243-1

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Terminal Block
Provides screw or spring-clamp terminals for secure wire connections

Material: Thermoplastic with brass or copper alloy contacts
Enclosure Cover Part
Protects internal components and provides environmental sealing

Material: Thermoplastic or metal with gasket
Cable Gland
Secures and seals incoming/outgoing cables

Material: Nylon, brass, or stainless steel
Mounting Bracket Part
Allows secure attachment to heating jacket or mounting surface

Material: Stainless steel or galvanized steel
Terminal Box Housing
The box itself — it is what encloses the terminals and keeps dust and water out.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Heating Jacket

View system integration details

Manufacturers of Terminal Box/Connection Head

Manufacturer profiles associated with Terminal Box/Connection Head.

Sourcing Terminal Box/Connection Head from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the purpose of a terminal box in a heating jacket?

The terminal box provides a protective enclosure for electrical connections between the heating element and external power or control systems. It ensures secure connections and protects against environmental factors like dust and moisture.

What are the typical ingress protection ratings for these terminal boxes?

Typical ingress protection ratings are IP54 to IP65, meaning they are dust-tight and resistant to water splashes. The exact rating depends on the model and should be verified with the manufacturer.

What voltage and current ranges are available?

The rated voltage ranges from 250 to 690 V AC, and the rated current from 10 to 63 A. These values are reference ranges; the specific model must be checked for exact ratings.

What materials are used for the enclosure?

Common materials include thermoplastic (polycarbonate, ABS), stainless steel, and aluminum alloy. Some models use die-cast aluminum alloy ADC12 with epoxy-polyester surface treatment for corrosion protection.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Terminal Box/Connection Head

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Atmospheric (non-pressurized enclosure)
other spec:	IP66/IP67 ingress protection, 600V max voltage rating, 20A max current per terminal
temperature:	-40°C to +120°C (operational), up to +150°C (peak)

Terminal Box/Connection Head

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards