Why Choose the Finder 7P.62.9.036.0005 Type 2+3 Data and Signal Surge Protection Device?
The Finder 7P.62.9.036.0005 is a compact Type 2+3 surge protection device (SPD) designed to protect two-wire data lines, telecommunications interfaces, fire detection systems and low-voltage signalling circuits against transient overvoltages. Part of the Finder 7P Series, this specialist surge arrester combines coarse and fine surge suppression to help safeguard sensitive electronic equipment from electrical disturbances.
Designed for 24 V DC nominal signal circuits, the Finder 7P.62.9.036.0005 has a maximum continuous operating voltage (Uc) of 36 V DC and a nominal load current of 0.5 A. These characteristics make it suitable for compatible low-voltage signalling and communications applications where conventional mains surge protection devices would not provide the required protection characteristics.
The device provides a 5 kA nominal discharge current between signal cores and a 10 kA total discharge current between the combined cores and protective earth, measured using the 8/20 µs waveform. Its combined Type 2+3 protection provides both coarse and fine suppression, helping reduce transient voltage exposure on connected signal and data equipment.
With a slim 6 mm housing width, the Finder 7P.62.9.036.0005 is particularly well suited to control panels and communications cabinets where DIN rail space is limited. The device supports serial connection of two-wire signal circuits, helping protect against both line-to-line and line-to-earth transient overvoltages while allowing continuity of the cable shield.
Its combination of fast response, compact construction and specialist data-line protection makes the Finder 7P.62.9.036.0005 a practical choice for electrical contractors, fire detection engineers, industrial panel builders and telecommunications maintenance professionals.
Key Advantages
- Combined Type 2+3 surge protection: Provides coarse and fine suppression for compatible data and signal circuits.
- Designed for two-wire systems: Suitable for protecting low-voltage telecommunications and signalling lines.
- 36 V DC maximum continuous operating voltage: Intended for compatible 24 V DC nominal circuits.
- 5 kA nominal discharge current: Provides protection against line-to-line transient surges.
- 10 kA total discharge current: Supports protection against common-mode surges to protective earth.
- Fast 1 ns response time: Helps limit rapidly developing transient overvoltages.
- Low voltage protection levels: Helps reduce electrical stress on sensitive signal interfaces.
- Compact 6 mm width: Saves valuable DIN rail space in densely populated control cabinets.
- Serial signal-line connection: Allows the protective device to be integrated into the signal path.
- Line-to-line protection: Helps protect against differential-mode transient overvoltages.
- Line-to-earth protection: Helps protect against common-mode transient overvoltages.
- Cable shield continuity: Supports shielded signalling and telecommunications wiring arrangements.
- Fire detection system applications: Suitable for compatible low-voltage fire alarm signalling circuits.
- 35 mm DIN rail mounting: Enables convenient installation inside electrical and communications enclosures.
- Wide operating temperature range: Suitable for operation from -40 °C to +70 °C.
- IP20 construction: Intended for installation within appropriately rated electrical enclosures.
Key Features
- Finder 7P Series data and signal surge protection device.
- Manufacturer part number: 7P.62.9.036.0005.
- Alternative part number: 7P6290360005.
- SPD classification: Type 2+3.
- Application: Two-wire data, telecommunications and signalling circuits.
- Nominal voltage (Un): 24 V DC.
- Maximum continuous operating voltage (Uc): 36 V DC.
- Nominal load current (IL): 0.5 A.
- C2 nominal discharge current, core-to-core: 5 kA.
- C2 total discharge current, cores-to-PE: 10 kA.
- Surge current waveform: 8/20 µs.
- C2 voltage protection level, core-to-core: 50 V.
- C2 voltage protection level, core-to-PE: 65 V.
- C3 voltage protection level, core-to-core: 45 V.
- C3 voltage protection level, core-to-PE: 45 V.
- Response time: 1 ns.
- Series resistance per core: 1.6 Ω.
- Specified threshold frequency: 4 MHz.
- Two-wire serial connection with shield continuity.
- DIN rail mounting: 35 mm rail according to EN 60715.
- Housing width: 6 mm.
- Ingress protection: IP20.
- Operating temperature: -40 °C to +70 °C.
- Product standard: EN 61643-21.
- EAN / GTIN: 8012823401256.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Series
- Product family: 7P.62
- Manufacturer part number: 7P.62.9.036.0005
- Alternative code: 7P6290360005
- EAN / GTIN: 8012823401256
- Product type: Data and signal surge protection device
- SPD classification: Type 2+3
- Protection arrangement: Two-wire signal circuit
- Nominal voltage (Un): 24 V DC
- Maximum continuous operating voltage (Uc): 36 V DC
- Nominal load current (IL): 0.5 A
- C2 nominal discharge current, core-to-core (In): 5 kA
- C2 total discharge current, cores-to-PE: 10 kA
- Discharge current waveform: 8/20 µs
- C2 voltage protection level, core-to-core at In: 50 V
- C2 voltage protection level, core-to-PE at In: 65 V
- C3 voltage protection level, core-to-core at 1 kV/µs: 45 V
- C3 voltage protection level, core-to-PE at 1 kV/µs: 45 V
- Response time, core-to-core: 1 ns
- Response time, core-to-PE: 1 ns
- Series resistance per core: 1.6 Ω
- Threshold frequency, core-to-core: 4 MHz
- Signal connection: Serial / in-line
- Protection modes: Core-to-core and core-to-protective-earth
- Shield continuity: Supported
- Mounting: 35 mm DIN rail, EN 60715
- Height: 91 mm
- Width: 6 mm
- Depth: 58 mm
- Maximum solid conductor size: 4 mm²
- Maximum stranded conductor size: 2.5 mm²
- Ingress protection: IP20
- Operating temperature range: -40 °C to +70 °C
- Applicable surge protection standard: EN 61643-21
- Approximate net weight: 33.6 g
- Country of origin: Czechia
- Typical applications: Fire detection systems, telecommunications interfaces and two-wire data lines
Specialist Protection for Two-Wire Data and Telecommunications Circuits
Low-voltage data and signalling circuits can be particularly vulnerable to transient overvoltages. Long cable runs, connections between different areas of a building and wiring installed near electrical power equipment can expose sensitive signal interfaces to disturbances caused by switching operations and nearby lightning activity.
The Finder 7P.62.9.036.0005 is designed to help reduce these risks by providing combined Type 2+3 surge protection for compatible two-wire circuits. Its protection arrangement addresses both differential-mode and common-mode transient overvoltages.
Differential-mode protection operates between the two signal conductors, helping limit excessive voltage differences that could damage connected electronic interfaces. Common-mode protection operates between the signal conductors and protective earth, helping divert surges that affect both conductors relative to earth.
The device is designed for serial installation within the signal path, providing protection at the point where the cable enters or connects to sensitive equipment. Its connection arrangement also allows continuity of the cable shield, an important consideration for compatible shielded telecommunications and signalling systems.
With a 24 V DC nominal voltage and 36 V DC maximum operating voltage, the device is suitable for selected low-voltage signalling applications. However, compatibility must be assessed using the actual operating voltage, current, signal frequency and electrical characteristics of the protected interface.
The 0.5 A nominal load current and 1.6 Ω series resistance per core are particularly important when protecting powered signalling circuits. These values should be considered when assessing permissible voltage drop and the effect of the SPD on normal signal transmission.
The Finder 7P.62.9.036.0005 combines coarse and fine surge suppression to provide protection against transient overvoltages in compatible data and signalling circuits.
Under the C2 test classification, the device provides a 5 kA nominal discharge current between the signal cores and a 10 kA total discharge current between the combined cores and protective earth, using the 8/20 µs waveform.
The specified C2 voltage protection level is 50 V core-to-core and 65 V core-to-PE at the nominal discharge current. These figures help engineers assess the transient voltage exposure of connected equipment under the relevant test conditions.
Under the C3 test classification, the device provides a 45 V voltage protection level for both core-to-core and core-to-PE modes at a voltage rise rate of 1 kV/µs.
The specified 1 ns response time supports rapid reaction to transient overvoltages. Effective protection also depends on installation wiring, protective earthing, cable routing and the impulse withstand capability of connected equipment.
The Finder 7P.62.9.036.0005 is a signal-line SPD, not a replacement for a mains power surge protector. Where equipment has both power and communications connections, each relevant connection may require appropriately coordinated protection.
Space-Saving DIN Rail Installation and Signal-Line Integration
The Finder 7P.62.9.036.0005 mounts onto a standard 35 mm DIN rail according to EN 60715. With a housing width of only 6 mm, it can be incorporated into densely populated electrical control panels, fire detection cabinets and telecommunications enclosures.
The device is designed for in-line connection of a two-wire circuit. The incoming and outgoing signal conductors must be connected according to Finder's terminal diagram, with the protective earth and cable shield connections arranged as specified by the manufacturer.
Correct earthing is essential for effective common-mode surge protection. The protective earth connection should provide a suitable low-impedance path for transient surge current, with wiring kept as short and direct as practicable.
When selecting the device, engineers should verify that the protected circuit does not exceed the 36 V DC maximum operating voltage or the 0.5 A nominal load current. The 1.6 Ω series resistance per core and 4 MHz threshold frequency must also be considered to ensure compatibility with the intended signalling protocol.
The device accepts conductors up to 4 mm² solid or 2.5 mm² stranded, subject to the manufacturer's connection requirements. Its IP20 rating means it must be installed within a suitable enclosure.
Installation and maintenance should be carried out by a competent professional following the manufacturer's instructions and applicable electrical, telecommunications or fire detection system standards.
Typical Applications
- Fire detection system signalling circuits.
- Compatible fire alarm communications interfaces.
- Two-wire telecommunications lines.
- Low-voltage data transmission circuits.
- Industrial signalling networks.
- Building automation communication interfaces.
- Remote monitoring and telemetry circuits.
- Industrial instrumentation signal lines.
- Compatible 24 V DC control and signalling circuits.
- Electrical control panels with sensitive data interfaces.
- Telecommunications distribution cabinets.
- Long-distance low-voltage signal cabling.
- Data and signalling lines entering electrical enclosures.
- Infrastructure monitoring and alarm circuits.
- Compatible two-wire bus systems operating within the device's electrical limits.
