BENDER VMD420-D-2 Voltage Relay – Symmetrical Component Relay
BENDER VMD420-D-2 Voltage Relay: Global Sourcing Strategy & Asset Return Value The BENDER VMD420-D-2 is a symmetrical component relay engineered…
Model: IRDH275B-435
Product Overview
Commercial availability is handled through direct RFQ, model verification and export-oriented follow-up rather than public cart checkout.
Datasheet Preview
Use attached product manuals when available. If the manual is not public yet, request the full file directly through RFQ.
Commercial Path
Product pages on DRIVEKNMS are designed to verify model, brand and series first, then move the buyer into one clean quotation path.
Technical Dossier
The BENDER IRDH275B-435 is a high-precision insulation monitoring device from BENDER's isoPV series, engineered for ungrounded IT systems and photovoltaic installations operating up to 1000 V DC. In sectors where electrical insulation failure triggers unplanned shutdowns — renewable energy, marine, oil & gas, and industrial automation — this device is not a commodity. Its combination of wide voltage range, adaptive measurement technology, and compliance with IEC 61557-8 makes it a specification-locked component in many plant designs.
For procurement managers sourcing this model: availability is intermittent through standard distribution channels. DriveKNMS maintains a dedicated sourcing network for BENDER products, including discontinued and low-volume variants, enabling faster lead times than waiting on OEM backorder queues.
| Brand | BENDER |
| Model / Part Number | IRDH275B-435 |
| Series | isoPV |
| Function | Insulation Fault Monitoring for Unearthed IT Systems |
| Rated Voltage | AC/DC up to 1000 V |
| Measuring Voltage | ≤ 12 V DC (non-intrusive adaptive measurement) |
| Response Value | 1 kΩ – 10 MΩ (adjustable) |
| Standards Compliance | IEC 61557-8, IEC 60364-6 |
| Output | 2 relay outputs + RS-485 / Modbus RTU |
| Operating Temperature | -25 °C to +70 °C |
| Protection Class | IP30 (panel mount) |
| Country of Origin | Germany |
| Inventory Status | Sourced on request — typical lead time 3–10 business days |
| Condition | New, original packaging (surplus / authorized channel) |
Note: The IRDH275B-435 has reached end-of-active-production in some regional markets. DriveKNMS specializes in sourcing verified surplus and authorized new-old-stock (NOS) units. All units are tested for functionality and supplied with traceable documentation.
Procurement decisions for insulation monitoring devices are rarely about unit price alone. The true cost calculus involves three variables: spare parts turnover rate, downtime risk per failure event, and total cost of ownership (TCO) over the asset lifecycle.
Spare Parts Turnover Rate: The IRDH275B-435 is a low-turnover, high-criticality component. Plants typically hold one to two units as cold standby. Sourcing from a single OEM channel creates a single point of failure in your MRO supply chain. DriveKNMS provides a secondary sourcing layer, reducing your exposure to OEM lead time volatility — which for BENDER specialty devices can exceed 12–16 weeks through standard distributors.
Downtime Cost Benchmark: In photovoltaic and industrial IT systems, an undetected insulation fault can trigger a full system shutdown. Depending on plant capacity, downtime costs range from USD 5,000 to USD 80,000 per hour. A replacement unit sourced within 3–5 days versus 12+ weeks represents a measurable risk reduction — not a procurement luxury.
TCO Advantage with DriveKNMS: Our pricing is structured to be competitive against both OEM list price and grey-market alternatives, while maintaining full traceability. You avoid the hidden costs of unverified sources: failed incoming inspection, warranty voids, and customs compliance penalties. One verified unit from DriveKNMS costs less in total than two units from an unvetted supplier.
Sourcing Network Depth: We maintain relationships with authorized BENDER distributors, certified surplus dealers, and OEM service channels across Europe, North America, and Asia. When a model is listed as discontinued or long lead time by your primary supplier, our network is the next call to make.
Part Number Verification & Cross-Reference: Misidentified part numbers are a leading cause of procurement errors for complex devices like insulation monitors. Our technical team verifies every order against the original BENDER catalog, checks for hardware revision compatibility, and flags potential substitution risks before shipment.
Financial Compliance: We issue VAT-compliant invoices, support split-payment structures for budget-period procurement, and provide all documentation required for asset capitalization and audit trails. Our export records are maintained for 7 years in compliance with international trade regulations.
Repeat Buyer Program: Customers with recurring MRO needs receive priority allocation, volume pricing, and dedicated account management. If you manage a multi-site plant portfolio with BENDER-specified equipment, contact us to discuss a framework agreement.
Q: What are your payment terms?
A: Standard terms are 100% T/T in advance for first orders. For verified corporate buyers, we offer Net 30 or 50% deposit / 50% before shipment. L/C at sight is accepted for orders above USD 5,000.
Q: What is your warranty policy if the unit is DOA or fails within the warranty period?
A: We offer full replacement or refund for DOA units confirmed within 7 days of receipt. For in-warranty failures (within 12 months), we provide a replacement unit after fault verification. Return shipping costs are covered by DriveKNMS for confirmed warranty claims.
Q: Can I get a volume discount for multiple units?
A: Yes. Quantity pricing is available for orders of 3+ units. Contact us with your RFQ and target quantity for a tiered price schedule.
Q: Is this a genuine BENDER product?
A: All units are sourced from traceable supply chains — authorized distributors, certified surplus, or OEM service stock. We do not deal in counterfeit or remanufactured goods. Documentation is provided upon request.
Q: What if I need a compatible alternative because the IRDH275B-435 is unavailable?
A: Our technical team can recommend compatible BENDER models (e.g., IRDH375, isoPV425) or equivalent devices from other manufacturers that meet your system specifications. We will not recommend a substitute without confirming electrical and protocol compatibility first.