HH Series Miniature Plug-in Intermediate Relay

Product Overview

The HH series miniature plug-in intermediate relay is a general-purpose electromagnetic control component widely used in low-voltage industrial control and automation systems. It functions as a signal amplifier, contact expander and logic switch between control circuits and power loads, enabling low-power control signals to switch multiple or higher-current loads. It is typically installed in control cabinets, PLC panels and machine electrical boxes.

The series covers 6 standard models from HH52P to HH64P, with 2, 3 and 4 contact pole options in both standard and high-current ratings. All models adopt high-quality silver alloy contacts for stable switching performance and long electrical life, and are equipped with transparent covers for visual operation status inspection. Each relay is used with a dedicated matching socket base with screw terminals, supporting direct 35mm DIN-rail mounting or panel screw fixing. With a wide selection of AC and DC coil voltages, it is flexibly adaptable to different control system voltages. It is widely applied in industrial automation production lines, machine tool control, power distribution, packaging machinery, conveyor systems and building automation.

Key Product Features

✅ Full Model Range & Multiple Contact Configurations 6 standard models: HH52P (2NO+2NC, 8-pin), HH53P (3NO+3NC, 11-pin), HH54P (4NO+4NC, 14-pin), HH62P, HH63P, HH64P high-current versions. Covers light signal control up to higher-current load switching, meets diverse control circuit requirements.

✅ High-Grade Silver Alloy Contacts Precision silver alloy contact material, low and stable contact resistance, excellent arc resistance and anti-welding performance. Reliably switches resistive, inductive and lamp loads, ensures long electrical life under frequent switching cycles.

✅ Transparent Cover with Visual Status Clear transparent plastic cover protects internal mechanism from dust and foreign objects, while allowing direct visual inspection of contact actuation and relay status. Enables quick on-site fault diagnosis without testing instruments.

✅ Matching Socket Base with DIN-Rail Mount Dedicated screw-terminal socket base for each model. Supports standard 35mm DIN rail snap-in installation as well as panel screw fixing. Reliable wiring connection and easy relay replacement without rewiring, reduces maintenance downtime.

✅ Wide Coil Voltage Selection Multiple coil voltage options available: AC 12V, 24V, 110V, 220V, 380V; DC 12V, 24V, 48V. Adapts to different regional control standards and system voltage requirements.

✅ Industrial-Grade Mechanical & Electrical Reliability Robust coil and magnetic circuit design, high mechanical shock and vibration resistance. Suitable for continuous operation in harsh industrial workshop environments, meets general IEC low-voltage control component standards.

Technical Specifications

Application Scenarios

• PLC output expansion and signal isolation in industrial automation systems
• Machine tool electrical control circuits and auxiliary control loops
• Distribution cabinet and switchgear auxiliary control and signal conversion
• Packaging machinery, conveyor systems and production line control
• Building automation, HVAC and fire alarm control systems
• Power supply, instrumentation and communication equipment control

Our Advantages

1. Full specification stock availability All 6 models with common coil voltages in sufficient stock. Support mixed batch orders for panel builders and automation contractors, with fast bulk shipment available.
2. Stable and reliable contact performance Genuine silver alloy contacts as standard, consistent contact resistance and long electrical life. Avoids contact oxidation, welding and false switching issues under long-term frequent operation.
3. Strict factory quality inspection Each relay undergoes pull-in/release voltage test, contact resistance test, insulation test and mechanical operation test before delivery to ensure stable out-of-box performance.
4. Universal interchangeability Industry-standard pin layout and mounting dimensions, fully compatible with mainstream HH series relays and sockets on the market. Can be directly replaced without modification to the base or wiring.
5. Complete technical support Provide dimension drawings, wiring diagrams, selection guides and coil voltage tables to support project design, tender bidding and on-site commissioning.

Custom Solution

We provide project-oriented custom solutions for intermediate relays:

• OEM Brand Customization: Custom logo printing on relay cover and socket base for distributor branded resale.
• Coil Voltage Customization: Special coil voltage and frequency according to target market and control system requirements.
• Contact Configuration Customization: Special contact forms and contact material upgrade for special load requirements.
• Export-grade Custom Packing: Neutral carton, customer-branded packaging and anti-static packaging for long-distance sea transportation.
• Large-order Priority Production: Priority production schedule for large automation project and OEM orders.

Share your required model, coil voltage and application scenario, our engineers will recommend the most suitable relay solution within 24 working hours.

FAQ

Q1: What is an intermediate relay used for?

A: An intermediate relay is used to amplify control signals, expand the number of contacts, isolate control circuits from power circuits, and implement logic control in automation systems. It allows low-power control signals to switch multiple or higher-current loads.

Q2: What do the model numbers mean?

A: HH is the series name. The first two digits indicate the number of contact poles: 52 = 2 poles, 53 = 3 poles, 54 = 4 poles. The last letter P indicates plug-in type. Models starting with 6 are high-current versions.

Q3: Does it come with the socket base?

A: The relay and the socket base are normally supplied as a set. They can also be ordered separately according to your requirements. The socket base supports both DIN-rail and panel mounting.

Q4: What coil voltages are available?

A: Standard options include AC 12V, 24V, 110V, 220V, 380V and DC 12V, 24V, 48V. Special voltages can be customized for bulk orders.

Q5: What is the advantage of silver alloy contacts?

A: Silver alloy contacts have low contact resistance, excellent arc resistance and anti-welding performance. They provide more reliable switching and longer service life compared to pure copper or brass contacts, especially for inductive loads.

Q6: Do you support OEM private label service?

A: Yes, we support custom logo printing on the relay cover and socket base. A certain minimum order quantity applies for OEM service.

Q7: Can it replace other brands of HH series relays?

A: Yes. Standard pin layout and mounting dimensions are compatible with all mainstream HH series relays on the market. It can be directly plugged into existing HH series sockets without wiring modification.

Package Content

1 × HH Series Intermediate Relay 1 × Matching Socket Base (optional)