Safety relay from Siemens
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Safety relay from Siemens
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 Siemens 3LD22540TK53 main emergency Schallter 3-pole, 3LD2254-0
SENTRON, load disconnector 3LD, emergency stop switch, 3-pole, Iu: 32 A, operating power / at AC-23 A at 400V: 11.5 kW, front-mounted, rotary drive, red/yellow, central mounting 22.5 mm of the handle ...Lieske Part No.: 954269 Mfg Part No: 3LD22540TK53 Type: 3LD2254-0TK53 |
56,86 EUR
 ≈ £48.50 | ≈ $64.76
Delivery time from supplier's stock (ca.) 1 workdaysinfo_outline
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Siemens 3RB30161NB0 Overload Relay 0.32 ... 1.25 A, 3RB3016-1N
Overload relay 0.32...1.25 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay ... Lieske Part No.: 469620 Mfg Part No: 3RB30161NB0 Type: 3RB3016-1NB0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161NE0 3RB3016-1NE0 overload relay 0.32 to 1, S00
Overload relay 0.32...1.25 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: Spring-loaded terminal Auxiliary circuit: Spring-loaded terminal Manual-automatic ... Lieske Part No.: 599486 Mfg Part No: 3RB30161NE0 Type: 3RB3016-1NE0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161PB0 Overload Relays 1 .. 4 A, 3RB3016-1PB0
Overload relay 1...4 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS ... Lieske Part No.: 973027 Mfg Part No: 3RB30161PB0 Type: 3RB3016-1PB0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161PE0 3RB3016-1PE0 overload relay 1-4A Mon, Clas
Overload relay 1...4 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: Spring-loaded terminal Auxiliary circuit: Spring-loaded terminal Manual-automatic RESET ... Lieske Part No.: 712503 Mfg Part No: 3RB30161PE0 Type: 3RB3016-1PE0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161RE0 3RB3016-1RE0 Overload Relay 0.1-0.4, Class
Overload relay 0.1...0.4 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: Spring-loaded terminal Auxiliary circuit: Spring-loaded terminal Manual-automatic ... Lieske Part No.: 334992 Mfg Part No: 3RB30161RE0 Type: 3RB3016-1RE0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161SB0 Overload Relays 3 .. 12 A, 3RB3016-1SB0
Overload relay 3...12 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS ... Lieske Part No.: 997514 Mfg Part No: 3RB30161SB0 Type: 3RB3016-1SB0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161SE0 3RB3016-1SE0 Overload Relay 3-12A M, Class
Overload relay 3...12 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: Spring-loaded terminal Auxiliary circuit: Spring-loaded terminal Manual-automatic RESET ... Lieske Part No.: 108830 Mfg Part No: 3RB30161SE0 Type: 3RB3016-1SE0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30161TB0 Overload Relays 4 .. 16 A, 3RB3016-1TB0
Overload relay 4...16 A electronic for motor protection Size S00, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS ... Lieske Part No.: 100877 Mfg Part No: 3RB30161TB0 Type: 3RB3016-1TB0 |
115,83 EUR
≈ £98.80 | ≈ $131.93
Delivery time on requestinfo_outline
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Siemens 3RB30261QB0 Overload Relay 6 .. 25 A, 3RB3026-1QB0
Overload relay 6...25 A electronic for motor protection Size S0, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS ... Lieske Part No.: 377146 Mfg Part No: 3RB30261QB0 Type: 3RB3026-1QB0 |
130,68 EUR
≈ £111.47 | ≈ $148.84
Delivery time on requestinfo_outline
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Siemens 3RB30261VB0 Overload Relays 10 - 40 A, 3RB3026-1VB0
Overload relay 10...40 A electronic for motor protection Size S0, CLASS 10E Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS ... Lieske Part No.: 237391 Mfg Part No: 3RB30261VB0 Type: 3RB3026-1VB0 |
194,04 EUR
≈ £165.52 | ≈ $221.01
Delivery time on requestinfo_outline
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Siemens 3RU21160EB0 Overload Relay 0.28 to 0.40, 3RU2116-0EB0
Overload relay 0.28...0.40 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 350552 Mfg Part No: 3RU21160EB0 Type: 3RU2116-0EB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21160FB0 Overload Relays from 0.35 to 0.50, 3RU2116
Overload relay 0.35...0.50 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 282280 Mfg Part No: 3RU21160FB0 Type: 3RU2116-0FB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21160GB0 Overload Relay 0.45 to 0.63, 3RU2116-0GB0
Overload relay 0.45...0.63 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 232301 Mfg Part No: 3RU21160GB0 Type: 3RU2116-0GB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21160HB0 Overload Relay 0.55 to 0.80, 3RU2116-0HB0
Overload relay 0.55...0.80 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 272217 Mfg Part No: 3RU21160HB0 Type: 3RU2116-0HB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21160JB0 Overload Relay 0.70 to 1.0 A, 3RU2116-0JB0
Overload relay 0.70...1.0 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 206149 Mfg Part No: 3RU21160JB0 Type: 3RU2116-0JB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time from supplier's stock (ca.) 1 workdaysinfo_outline
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Siemens 3RU21160KB0 Overload Relay 0.90 to 1.25, 3RU2116-0KB0
Overload relay 0.90...1.25 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 938032 Mfg Part No: 3RU21160KB0 Type: 3RU2116-0KB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21161AB0 Overload Relay 1.1 to 1.6 A, 3RU2116-1AB0
Overload relay 1.1...1.6 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 130615 Mfg Part No: 3RU21161AB0 Type: 3RU2116-1AB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time from supplier's stock (ca.) 1 workdaysinfo_outline
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Siemens 3RU21161BB0 Overload relay 1.4 - 2.0 A, 3RU2116-1BB0
Overload relay 1.4...2.0 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 865942 Mfg Part No: 3RU21161BB0 Type: 3RU2116-1BB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21161BB1 Overload Relay 1.4-2.0 A, 3RU2116-1BB1 for
Overload relay 1.4...2.0 A thermal for motor protection Size S00, CLASS 10 Stand-alone installation Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS ... Lieske Part No.: 786521 Mfg Part No: 3RU21161BB1 Type: 3RU2116-1BB1 |
97,52 EUR
≈ £83.18 | ≈ $111.08
Delivery time on requestinfo_outline
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Siemens 3RU21161CB0 Overload Relay 1.8 to 2.5 A, 3RU2116-1CB0
Overload relay 1.8...2.5 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 408825 Mfg Part No: 3RU21161CB0 Type: 3RU2116-1CB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21161DB0 Overload Relay 2.2 to 3.2 A, 3RU2116-1DB0
Overload relay 2.2...3.2 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 678120 Mfg Part No: 3RU21161DB0 Type: 3RU2116-1DB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time from supplier's stock (ca.) 1 workdaysinfo_outline
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Siemens 3RU21161EB0 Overload Relay 2.8 to 4.0 A, 3RU2116-1EB0
Overload relay 2.8...4.0 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 650723 Mfg Part No: 3RU21161EB0 Type: 3RU2116-1EB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time on requestinfo_outline
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Siemens 3RU21161FB0 Overload relay 3,5 - 5,0 A, 3RU2116-1FB0
Overload relay 3.5...5.0 A thermal for motor protection Size S00, CLASS 10 Contactor attachment Main circuit: screw Auxiliary circuit: screw Manual-automatic RESET Thermal overload relay SIRIUS 3RU2 ... Lieske Part No.: 378059 Mfg Part No: 3RU21161FB0 Type: 3RU2116-1FB0 |
76,43 EUR
≈ £65.19 | ≈ $87.05
Delivery time from supplier's stock (ca.) 1 workdaysinfo_outline
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Standards and Directives for Safety Relays
The selection and use of safety switching devices is clearly governed by international standards and EU directives.
| ISO 13849-1 – Performance Level Defines requirements for safety-related parts of control systems (SRP/CS). The standard specifies 5 Performance Levels (PL a to PL e) and describes how to calculate them using category, MTTF, DC and CCF. The primary standard for machine builders in the EU. | IEC 62061 – Safety Integrity Level Standard for safety-related electrical control systems in industry. Assesses safety functions via Safety Integrity Level (SIL 1 to 3) based on PFH values (probability of dangerous failure per hour). Used alongside or as an alternative to ISO 13849. | EN 60947-5-1 – Low-Voltage Switchgear Product standard for electromechanical control devices. Governs technical requirements for control and signalling circuits, switching devices and positively guided contacts. Basis for CE marking of safety relays. | ||
| Machinery Directive 2006/42/EC EU directive establishing essential health and safety requirements for machinery. Safety relays are frequently part of the evidence for the declaration of conformity. From 2027 it will be replaced by the Machinery Regulation (EU) 2023/1230. | IEC 61810-3 – Positively Guided Contacts Defines requirements for electromechanical elementary relays with positively guided contacts. The positive guidance ensures that NC and NO contacts can never be closed simultaneously – the fundamental principle of relay safety. | EN 574 – Two-Hand Controls Safety standard specifically for two-hand controls. Defines three types (I, II, III) with different levels of protection. Type III C (simultaneous actuation, anti-defeat) is the highest level and is required for presses and stamping machines. | ||
Performance Level vs. Safety Integrity Level
Both metrics describe the ability of a safety function to prevent a dangerous failure – calculated according to different standards.
| PL (ISO 13849) | SIL (IEC 62061) | PFH Range (failures/h) | Typical Application |
| PL a | – | ≥ 10⁻⁵ to < 10⁻⁴ | Simple guards, low risk categories |
| PL b | SIL 1 | ≥ 10⁻⁶ to < 10⁻⁵ | Simple guards, minor injury risk |
| PL c | SIL 1 | ≥ 10⁻⁷ to < 10⁻⁶ | Safety gates, simple guard rails, medium risks |
| PL d | SIL 2 | ≥ 10⁻⁸ to < 10⁻⁷ | Emergency stop, interlocked safety gates, light curtains |
| PL e | SIL 3 | ≥ 10⁻⁹ to < 10⁻⁸ | Highest requirements: presses, robot cells, ATEX zones |
Single-Channel vs. Dual-Channel Evaluation
The number of channels is decisive for the achievable Performance Level and fault tolerance of the safety function.
► Single-Channel Evaluation (Category B, 1, 2)
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⚠ Dual-Channel Evaluation (Category 3, 4)
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Related Categories in the Shop
Further products from the Industrial Relays and Contactors range at Industry-Electronics.
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► Industrial Relays Standard switching relays and coupling relays for general switching tasks in automation and control engineering. |
► Industrial Timing Relays Timing relays for start-up delays, run-down functions and cyclic control tasks in automation technology. |
► Contactors Power contactors and motor protection switches for safe switching of drives, motors and loads up into the kW range. |
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► Isolating Switches / Measuring Relays Transducer relays, monitoring relays and isolating amplifiers for process automation and plant engineering. |
► Electronic Components Electronic control and regulation modules, voltage monitors and control relays for industrial control tasks. |
► All Industrial Relays & Contactors To the complete range of the Industrial Relays and Contactors category with all sub-sections. |
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⚠ Safety Relay Technical Support
Uncertain about which safety relay is right for your application? Our technical team advises on device selection, Performance Level, wiring concepts and standards compliance – personally and without detours. +49 (0)7666 / 88499-0 | sales@industry-electronics.com |