BOSCH KM 3300-T 054915-103 Ruggedized DC Bus Capacitor Module
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In demanding industrial environments — from automated assembly lines and CNC machining centers to conveyor systems and hoisting equipment — the reliability of every drive component directly determines production uptime. The INTORQ BFK458-12E fail-safe electromagnetic brake is a precision-engineered spring-applied, electromagnetically released holding and safety brake from INTORQ’s proven BFK458 Series. Sourced directly from authorized supply channels and manufactured in Germany, this unit delivers the dimensional accuracy, torque consistency, and thermal resilience that maintenance engineers depend on when every minute of downtime carries a cost.
Whether you are executing a scheduled overhaul, responding to an unplanned stoppage, or building a strategic spare-parts buffer for a critical production cell, the BFK458-12E represents a direct, drop-in replacement that preserves your existing drive system’s mechanical and electrical interface — no re-engineering, no re-commissioning delays.
| Part Number | BFK458-12E |
| Brand / Manufacturer | INTORQ (Kendrion Group) |
| Series | BFK458 Fail-Safe Electromagnetic Brake |
| Operating Principle | Spring-applied, electromagnetically released (fail-safe) |
| Nominal Torque | 12 Nm (rated static holding torque) |
| Supply Voltage | 24 V DC (standard); rectifier-ready for AC supply |
| Power Consumption | Approx. 18–22 W (holding coil, warm) |
| Bore / Shaft Interface | Per BFK458-12 dimensional standard; confirm shaft diameter before ordering |
| Ingress Protection | IP54 (standard); IP65 available on request |
| Insulation Class | Class F (155 °C) |
| Ambient Temperature | -20 °C to +40 °C operating |
| Weight | Approx. 900 g |
| Country of Origin | Germany |
| Compatibility | Direct replacement for BFK458-12E in servo drives, hoisting, conveyor, and CNC spindle applications |
| Maintenance Interval | Inspect air gap every 2,000 operating hours or per OEM schedule |
| Warranty | 12 Months from date of shipment |
A brake failure rarely occurs in isolation. In most industrial drive trains, the BFK458-12E operates as part of a tightly integrated electromechanical system, and a thorough maintenance cycle should address the entire assembly — not just the brake itself.
When replacing or inspecting the BFK458-12E, maintenance teams should simultaneously verify the condition of the servo drive or frequency inverter powering the motor, since brake release voltage is drawn directly from the drive’s 24 V DC auxiliary output. A degraded drive output can cause intermittent brake release failures that are easily misdiagnosed as a brake fault. Alongside the drive, the brake rectifier module (if an AC supply is used) should be tested for output ripple and voltage drop — a failing rectifier is a common root cause of premature brake coil burnout.
The motor encoder or resolver mounted on the same shaft should be inspected for contamination and bearing play during any brake service, since both components share the same mechanical interface and are typically replaced together during a major overhaul. Similarly, the motor terminal box and power cable assembly should be checked for insulation integrity and connector seating, as vibration-induced loosening at the terminal block is a frequent source of intermittent faults in high-cycle applications.
At the control cabinet level, the 24 V DC power supply module feeding the brake circuit should be load-tested to confirm it can sustain inrush current during brake release without voltage sag. Pairing this with an inspection of the safety relay or brake control relay — which governs the brake’s enable/disable logic — ensures the entire safety circuit is validated, not just the mechanical brake element. For systems using a PLC digital output module to command the brake relay, verifying output channel integrity and response time is equally important.
In conveyor and hoisting applications, the limit switch assembly and position sensor associated with the braked axis should be confirmed functional, as these provide the feedback signals that determine when the brake is commanded to engage. Finally, the terminal block strip within the control cabinet — where brake wiring is landed — should be inspected for oxidation, loose screws, and correct torque, since high-resistance connections at terminal blocks are a leading cause of nuisance brake faults in humid or vibration-prone environments.
Addressing all of these components during a single planned maintenance window dramatically reduces the probability of a repeat callout and extends the effective service life of the entire drive system.
The BFK458-12E is a well-established platform that has been deployed across multiple generations of servo-driven machinery. Many facilities still operate equipment originally commissioned in the 2000s and early 2010s, where the BFK458 Series brake was specified as the OEM safety brake. As these machines age, sourcing genuine replacement brakes becomes a critical supply chain challenge — particularly when the original equipment manufacturer no longer stocks the part or has discontinued the product line.
Stocking the BFK458-12E as a managed spare eliminates the most dangerous phase of any unplanned stoppage: the procurement lead time. A genuine INTORQ BFK458-12E sourced from a verified supply channel can be installed and commissioned in under two hours by a qualified technician, restoring full production capability without any modification to the existing motor, drive, or control system. The dimensional and electrical compatibility of the BFK458 Series means that no re-parameterization of the servo drive is required — the replacement unit behaves identically to the original from the moment power is applied.
For facilities managing multiple machines with BFK458-series brakes across different torque ratings — such as the BFK458-08E, BFK458-16E, or BFK458-20E — a consolidated spare-parts strategy that covers the full torque range of installed units significantly reduces the risk of a single-point-of-failure stoppage affecting an entire production line. Centralizing procurement through a single verified source also simplifies incoming inspection, documentation, and warranty tracking.
Q1: Is this a genuine INTORQ BFK458-12E or an aftermarket equivalent?
This is an original INTORQ BFK458-12E sourced through verified industrial supply channels. Each unit is inspected prior to shipment and covered by a 12-month warranty from the date of dispatch. We do not supply remanufactured or counterfeit components.
Q2: How do I verify compatibility with my existing motor and drive system?
Compatibility is confirmed by matching the shaft bore diameter, flange mounting pattern, nominal torque rating (12 Nm), and supply voltage (24 V DC) against your motor’s nameplate and the OEM brake specification sheet. If you can provide your motor model number or the original brake part number from your machine documentation, our technical team can confirm compatibility before you place an order.
Q3: What is the typical lead time and how is the unit tested before shipment?
In-stock units are dispatched within 1–3 business days. Prior to shipment, each BFK458-12E is visually inspected for mechanical integrity, coil resistance is measured against the INTORQ specification, and the air gap is verified within tolerance. A test report is available on request.
Q4: What does the 12-month warranty cover, and what is the claims process?
The 12-month warranty covers manufacturing defects in materials and workmanship under normal operating conditions. It does not cover damage resulting from incorrect installation, overvoltage, contamination, or operation outside the rated parameters. To initiate a warranty claim, contact us with your order number, a description of the fault, and photographic evidence. Replacement or refund is processed within 5–7 business days of claim approval.
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