We will arrange delivery within 3-5 days after receiving the payment.

Our express delivery: DHL and FedEx.

Quality packing for each product

Destination country all taxes & duty to be paid by buyer

Only part of the brand and model, if you have other product needs, please contact us.

ABB DSSS170 Diode Unit 

1. Key Parameters

• Product Model: DSSS170
• Product Series: ABB AC500 Series Industrial Diode Units (Circuit Protection & Isolation)
• Core Function: Provides reverse polarity protection for DC circuits; suppresses inductive load voltage transients (freewheeling); enables one-way current flow to isolate sensitive components; protects AC500 PLC I/O modules, power supplies, and field devices from reverse voltage/current damage; supports DIN rail mounting for industrial cabinet integration
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Diode Characteristics	- Diode Type: Silicon rectifier diodes (hermetically sealed) - Rated Current (Continuous): 20A (per diode; 2 diodes in parallel for 40A total) - Peak Forward Current (10ms): 100A - Reverse Voltage Rating (V₀ᵣ): 100V DC - Forward Voltage Drop (Vբ): ≤0.8V DC (at 20A)	Parallel diode configuration delivers 40A continuous current capacity, covering high-load applications (e.g., 24V DC motors, large solenoids); 100V reverse rating protects against common industrial DC voltage spikes; low forward drop minimizes power loss (≤16W at 20A)
  Circuit Protection Performance	- Reverse Polarity Protection: Blocks current flow when input polarity is reversed (≤1μA leakage current at 100V reverse bias) - Freewheeling Function: Absorbs inductive kickback transients (up to 100V) from loads like motors/solenoids - Isolation: One-way current flow isolates downstream components (e.g., AC500 I/O modules) from upstream voltage anomalies	≤1μA leakage current ensures minimal power waste in standby; inductive transient suppression prevents voltage spikes (common in motor shutdown) from damaging PLC modules; one-way isolation avoids backfeeding from backup batteries

• Mechanical & Environmental Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 60mm (W) × 90mm (H) × 110mm (D) - Mounting Type: DIN rail mount (EN 50022, 35mm, tool-less snap-on) - Housing Material: Flame-retardant thermoplastic (UL 94 V0) with heat-dissipating aluminum insert - Weight: Approximately 250g - Indicators: 2× LED status lights (green = forward current flowing; off = reverse bias/no current)	Compact DIN rail design saves cabinet space (fits in narrow panels); aluminum insert enhances heat dissipation for 40A current; LED indicators enable quick on-site verification of current direction (critical for troubleshooting reverse polarity issues)
  Environmental Ratings	- Operating Temperature Range: -40℃~+85℃ (-40℉~185℉) - Storage Temperature Range: -55℃~+125℃ (-67℉~257℉) - Humidity Tolerance: 5%~95% RH (non-condensing/condensing, up to 60℃) - Vibration Resistance: 10~500Hz, 1.5g acceleration (IEC 60068-2-6) - Shock Resistance: 30g (11ms half-sine, IEC 60068-2-27) - EMC Compliance: EN 61000-6-2 (immunity: Level 4); EN 61000-6-3 (emission: Class B)	-40℃~+85℃ range suits extreme environments (arctic substations, desert factories); condensing humidity tolerance eliminates dehumidifiers in damp areas (e.g., water treatment plants); 1.5g vibration resistance prevents loose connections in high-motion systems (e.g., near conveyors)

• Compliance Specifications:

  Parameter	Details	Performance Metrics
  Safety & Compliance	- Safety Standards: CE, UL 508, CSA C22.2 No.14, IEC 61010-1 (electrical safety) - Flame Retardancy: Housing (UL 94 V0); internal wiring (UL 1015, 105℃) - RoHS Compliance: EU RoHS 2.0 (Restriction of Hazardous Substances) - EMC Standards: IEC 61000-6-2 (immunity), IEC 61000-6-3 (emission)	UL 508/CSA certification ensures compliance with North American industrial safety requirements; flame-retardant design reduces fire risk in dense rack configurations; RoHS compliance meets global environmental regulations

2. Core Features

• High-Current Reverse Polarity Protection: 40A continuous current capacity (2× 20A diodes in parallel)—protects high-load DC circuits (e.g., 24V DC motors, large solenoids) from reverse polarity damage (common in battery wiring or power supply swaps); ≤1μA reverse leakage current minimizes power waste in standby mode.
• Inductive Transient Suppression (Freewheeling): Absorbs voltage kickbacks from inductive loads (e.g., motor windings, solenoid coils) during shutdown—prevents transient spikes (up to 100V) from damaging AC500 PLC I/O modules (e.g., DSMB178 digital outputs) or power supplies (e.g., DSSA165); eliminates the need for separate freewheeling diodes for each load.
• One-Way Circuit Isolation: Enforces unidirectional current flow—isolates sensitive downstream components (e.g., AC500 analog I/O modules, precision sensors) from upstream voltage anomalies (e.g., battery overcharge, power supply fluctuations); prevents backfeeding from backup systems (e.g., batteries) into mains-powered circuits.
• Industrial-Grade Durability: UL 94 V0 flame-retardant housing + -40℃~+85℃ operating range—withstands extreme temperatures, humidity, and vibration in harsh industrial environments; hermetically sealed diodes resist dust, moisture, and chemical exposure (e.g., oil mist in manufacturing), extending service life to 10+ years.
• Efficient Heat Dissipation: Aluminum insert in the housing—enhances passive heat dissipation for high-current operation (40A continuous); avoids overheating (critical for diode reliability, as excess heat degrades reverse voltage ratings); eliminates the need for active cooling (fans), reducing maintenance needs.
• Simplified Installation & Troubleshooting: Tool-less DIN rail mounting + 2-color LEDs—installs in <1 minute (no custom brackets); green LEDs confirm forward current flow, enabling technicians to quickly verify correct wiring (e.g., no reverse polarity) without multimeters; standard terminal blocks accept 10AWG~14AWG wires for high-current connections.
• Seamless AC500 Integration: Designed for compatibility with AC500 PLC systems, power supplies, and I/O modules—connects between DC power sources (e.g., DSSA165) and loads (e.g., DSMB-controlled actuators); no configuration or calibration required, ensuring plug-and-play deployment in automation networks.

3. Application Fields

• Manufacturing Automation: Motor/Solenoid Protection:
  • Automotive Assembly Lines: Protects AC500 I/O modules from inductive transients—installed between DSMB178 digital outputs and 24V DC robotic gripper motors; freewheeling function absorbs voltage kickbacks during motor shutdown, preventing damage to PLC output channels; 40A capacity covers high-torque gripper loads.
  • Electronics SMT Factories: Provides reverse polarity protection for 24V DC conveyor motors—blocks reverse current if power supply wiring is reversed (common during maintenance); aluminum insert dissipates heat from 20A continuous motor current; LEDs confirm correct current flow, reducing troubleshooting time.
• Process Control: Valve & Pump Protection:
  • Chemical Plants: Suppresses inductive transients from 24V DC solenoid valves (reactor control)—prevents voltage spikes from damaging AC500 analog I/O modules (e.g., DSMB340) that monitor reactor pressure; -40℃~+85℃ range suits unconditioned control rooms near reactors; condensing humidity tolerance avoids diode degradation in damp areas.
  • Water Treatment Facilities: Protects 48V DC submersible pump circuits—reverse polarity protection prevents damage if pump wiring is reversed; 40A capacity handles pump startup current (up to 30A); EMC immunity resists interference from variable-speed drives (VFDs) in pump stations.
• Energy & Utilities: Battery & Inverter Protection:
  • Power Substations: Isolates AC500 PLC backup battery circuits—prevents backfeeding from 24V DC batteries into mains-powered AC500 systems; reverse polarity protection avoids damage if battery cables are connected incorrectly; 100V reverse rating withstands substation voltage transients.
  • Solar PV Plants: Protects 48V DC inverter auxiliary circuits—freewheeling function absorbs transients from inverter cooling fans; aluminum insert dissipates heat from 15A continuous fan current; -40℃~+85℃ range suits desert solar farm enclosures.
• Transportation: Mobile Equipment Protection:
  • Railway Signaling: Protects 24V DC signal solenoid circuits—reverse polarity protection prevents damage from incorrect battery wiring; vibration resistance (1.5g) withstands train-induced shocks; LEDs confirm signal solenoid current flow, aiding in remote troubleshooting.
  • Electric Vehicle (EV) Charging Stations: Isolates AC500 PLC control circuits from 48V DC charger power—prevents voltage anomalies from chargers damaging PLC I/O modules; 40A capacity covers high-current auxiliary loads (e.g., charging cable locks); flame-retardant housing meets EV safety standards.

The structure and details of the product：

 Please make an inquiry for more models

ABB DSQC323 3HAB5956-1

ABB DSQC327A 3HAC17971-1

ABB DSQC328A 3HAC1790-1

ABB DSQC351B 3HNE00006-1

ABB DSQC352 3HNE00009-1/11

ABB DSQC352B 3HNE00009-1

ABB DSQC373 3HAC3180-1 8.16

ABB DSQC377B 3HNE01586-1

ABB DSQC378B 3HNE00421-1

ABB DSQC400E 3HAC058424-001

ABB DSQC401 3HAC032243-001

ABB TAE 50-30-11-52

ABB ACS880-01-07A2-3 

ABB ACS880-01-12A6-3

ABB 1SBH141001R8031

ABB 3BSE052605R1

ABB DCS800-S01-0125-05

ABB DSQC417 3HAC035381-001

ABB DSQC431 3HAC036260-001/04

ABB DSQC462 3HAC047960-001

ABB DSQC504 3HAC5689-1

ABB DSQC539 3HAC14265-1

ABB DSQC540 3HAC14279-1/03

ABB DSQC562 3HAC16014-1

ABB DSQC601 3HAC12815-1

ABB DSQC601 3HAC12815-1/09

ABB DSQC612 3HAC15639-1/05

ABB DSQC633

ABB DSQC639 3HAC025097-001

ABB DSQC643 3HAC024488-001/01

ABB DSQC651 3HAC025784-001

ABB DSQC655 3HAC025562-001

ABB DSQC658 3HAC025779-001

ABB DSQC662 3HAC026254-001

ABB DSQC662 3HAC026254-001/11

ABB DSQC663 3HAC029818-001/08

ABB DSQC667 3HAC026840-001/00

ABB DSQC668 3HAC029157-001

ABB DSQC668 3HAC029157-001/06

ABB DSQC676 3HAC031612-004

ABB DSQC688 3HAC031670-001/02

ABB DSSB-01C 68300746

ABB DSSB01C 3AFE68300746

ABB DSSR170

ABB DSTA001B 3BSE018316R1

ABB DSTA131 57120001-CV/1

ABB DSTA131 57120001-CV

ABB DSTA145 57120001-HP

ABB DSTA145 57120001-HP

ABB DSTA155 EXC57120001-KD

ABB DSTA156 57120001-KH/3

ABB DSTA156B 3BSE018310R1

ABB DSTA160 57120001-AH

ABB DSTD110A 57160001-TZ/1

ABB DSTD108L 57160001-abw 

ABB DSTD108P 3BSE018333R1

ABB DSTD110A  57160001-tz/1

ABB DSTD130 57160001-AU/1

ABB DSTD150A 57160001-UH

ABB DSTD160 YB161102-AM/1

ABB DSTD306 57160001-SH

ABB DSTDW150 57160001-AAK

ABB DSTX170 57160001-ADK

ABB DSTXW110 57160001-AAP

ABB DSXS001 57170001-A

ABB DVC500 R05

ABB ECS086329-003

ABB EH800 EI803F 3BDH000017R1

ABB EI803F 3BDH000017R1

ABB ENTEK6600v3

ABB ENTEK6622LS

ABB ENTEK6652

ABB EQS104A0

ABB FAU800

ABB FDIV8CH

Other best-selling products：