Bender · Industrial Automation
Bender Parts & Automation Components
Bender was founded in 1946 in Grünberg, Hesse, Germany, by engineering graduate Walther Hans Bender, who patented the ISOMETER — the world's first insulation monitoring device — based on an idea he'd developed in 1937 for improving electrical safety in mining operations. Still family-owned four generations later, Bender celebrated its 80th anniversary in July 2026 and now employs nearly 1,100 people across subsidiaries on four continents. The company remains a global pioneer in electrical safety, insulation monitoring, ground-fault detection and residual current monitoring, with particular strength in hospitals, industrial power systems and electro-mobility charging infrastructure.
34 parts listed · independent supplier, not an authorised Bender distributor
ISOMETER Insulation Monitoring
Continuous insulation resistance monitoring devices for ungrounded (IT) electrical systems, Bender's founding product line.
RCM Residual Current Monitoring
Leakage current monitoring relays for grounded AC and DC power and control circuits.
Live catalogue
Bender parts we supply
| Part / Type Number | Description | Availability | |
|---|---|---|---|
| SUD142 | Bender SUD142 — genuine Bender insulation fault location component. | Contact us | View & Enquire |
| BENDER W35ABP | Bender BENDER W35ABP — Bender W-series insulation monitoring relay. | Contact us | View & Enquire |
| RCMA423 | Bender RCMA423 — RCM series residual current monitoring relay, part of Bender's ground-fault and leakage current detection range. | Contact us | View & Enquire |
| SED140 | Bender SED140 — genuine Bender insulation fault location component. | Contact us | View & Enquire |
| USGG151RY | Bender USGG151RY — genuine Bender ground-fault monitoring component. | Contact us | View & Enquire |
| VME421H-D-2 | Bender VME421H-D-2 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| VME421H-D-1 | Bender VME421H-D-1 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| VMD421H-D-3 | Bender VMD421H-D-3 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| RCMA472LY-21 | Bender RCMA472LY-21 — RCM series residual current monitoring relay, part of Bender's ground-fault and leakage current detection range. | Contact us | View & Enquire |
| W35ABP | Bender W35ABP — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| RCMA423-D-1 | Bender RCMA423-D-1 — RCM series residual current monitoring relay, part of Bender's ground-fault and leakage current detection range. | Contact us | View & Enquire |
| irdh375b-427 | Bender irdh375b-427 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| IRDH575 IRDH575B1-435 | Bender IRDH575 IRDH575B1-435 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| VMD421 VMD421 H-D-3 | Bender VMD421 VMD421 H-D-3 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| VMD421 VMD421 H-D-1 | Bender VMD421 VMD421 H-D-1 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| VMD421 VMD421 H-D-2 | Bender VMD421 VMD421 H-D-2 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| ir420-d4-1 | Bender ir420-d4-1 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ir425-d4-2 | Bender ir425-d4-2 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| eds490-dw-2 | Bender eds490-dw-2 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| agh204s-4 | Bender agh204s-4 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ir125y-4 | Bender ir125y-4 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ir470ly2-6013 | Bender ir470ly2-6013 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ir470ly-4021 | Bender ir470ly-4021 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| 7204-1321 | Bender 7204-1321 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ir425-d4-1 | Bender ir425-d4-1 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| vmd421h-d-2 | Bender vmd421h-d-2 — VME/VMD series insulation monitoring relay from Bender's ISOMETER product range. | Contact us | View & Enquire |
| ireh-150 | Bender ireh-150 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| ag150 | Bender ag150 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| pgh471 | Bender pgh471 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| irdh265-421 | Bender irdh265-421 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| irdh365-4 | Bender irdh365-4 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| e307 | Bender e307 — genuine Bender insulation monitoring or electrical safety component. | Contact us | View & Enquire |
| rcm465yn | Bender rcm465yn — RCM series residual current monitoring relay, part of Bender's ground-fault and leakage current detection range. | Contact us | View & Enquire |
| rcm460dy | Bender rcm460dy — RCM series residual current monitoring relay, part of Bender's ground-fault and leakage current detection range. | Contact us | View & Enquire |