TDK EPCOS Screw Terminal Aluminum Electrolytic Capacitors
Apexon Supply supports industrial buyers sourcing EPCOS and TDK EPCOS screw terminal aluminum electrolytic capacitors for DC-link circuits, frequency converters, inverters, motor drives, UPS systems, professional power supplies, and industrial repair projects. This focused page covers large can capacitors with screw-terminal electrical connections, including selected B43564, B43586, B43456, B43457, B43458, B43570, and B43701 models represented by the reviewed product pages.
The models used as examples here span multiple capacitance, voltage, case, and mounting configurations. They are not interchangeable simply because they share the EPCOS name or have similar electrical markings. Procurement and replacement decisions should begin with the complete ordering code, followed by model-specific comparison of voltage, capacitance, ripple current, ESR, dimensions, terminal hardware, mounting arrangement, temperature limits, and useful-life conditions.
EPCOS and TDK Markings on Industrial Capacitors
TDK Electronics is the successor company to EPCOS, and industrial equipment may contain components marked EPCOS, TDK EPCOS, or TDK. TDK Electronics announced that implementation of the EPCOS-to-TDK marking change would begin in April 2026 for affected passive components and sensors. During the transition, products may carry either the previous EPCOS marking or the newer TDK marking, while existing stock may retain its original EPCOS identification.
For sourcing purposes, the logo alone should not determine compatibility. Record the complete ordering code, capacitance, rated voltage, tolerance code, terminal and mounting details, case dimensions, date or batch information, and any additional label markings. A change in brand marking does not remove the need to confirm the exact technical identity and commercial status of the requested part.
TDK EPCOS Screw Terminal Capacitor Families
B43564 Industrial Aluminum Electrolytic Capacitors
B43564 is the most frequently represented family in the reviewed product group. These are polarized aluminum electrolytic capacitors with screw-terminal connections for industrial power electronics. The supplied listings include several 400 VDC configurations: B43564-S9378-M1 at 3,700 µF, B43564-S9488-M1 at 4,800 µF, B43564-S9528-M1 at 5,200 µF, B43564-S9578-M2 at 5,700 µF, and B43564-S9588-M1 at 5,800 µF.
Additional versions include B43564-S9588-M003 at 5,800 µF and 400 VDC and B43564-S9658-M2 at 6,500 µF and 400 VDC. Suffix differences must be preserved because they can identify tolerance, terminal, insulation, mounting, or customer-specific configurations. Do not shorten one order code to another or assume that M1, M2, M3, M003, and Q1 versions are equivalent.
B43586 and B43570 Long-Life Industrial Models
The reviewed B43586 models cover several voltage and capacitance combinations used in power conversion and energy-storage functions. Examples include B43586-S4478-Q2 at 4,700 µF and 350 VDC, B43586-S3468-Q3 at 4,600 µF and 385 VDC, B43586-S9418-Q3 at 4,100 µF and 400 V, and B43586-S9578-Q3 at 5,700 µF and 400 V.
The B43570-C4608-Q adds a 6,000 µF, 350 VDC screw-terminal option. These older or specialized ordering codes should be checked against the exact datasheet or equipment documentation because series-level descriptions cannot establish the dimensions, ripple-current rating, ESR, terminal layout, or useful life of an individual model.
B43456, B43457, and B43458 High-Voltage Models
The B43456, B43457, and B43458 families are represented by high-voltage, high-capacitance screw-terminal products. Reviewed examples include B43456-S9638-M1 at 6,300 µF and 400 VDC, B43456-S9758-M1 at 7,500 µF and 400 VDC, B43456-S5129-M1 at 12,000 µF and 450 VDC, and B43456-S7338-M1 at 3,300 µF and 550 VDC.
Other examples are B43457-S5338-M9 at 3,300 µF and 450 VDC and B43458-S9708-Q1 at 7,000 µF and 400 VDC. Screw terminals describe the electrical connection; they do not by themselves identify whether the can uses clamp mounting, a base stud, or another mechanical arrangement. Confirm both connection and mounting details.
B43701 Ultra-Compact Screw Terminal Models
TDK documentation identifies B43701 as an +85°C screw-terminal family covering multiple 350 to 450 VDC configurations. The reviewed B43701-S9338-M1 is listed at 3,300 µF and 400 VDC. Even when a family is described as compact, verify the exact diameter, length, terminal spacing, clamp or mounting hardware, and required cabinet clearance for the selected order code.
Representative Models for Technical Review
These examples show the range of verified product-page configurations used for this focused page. They are not a complete EPCOS portfolio, availability list, or replacement matrix.
| Series | Ordering code | Capacitance | Rated voltage | Connection |
|---|---|---|---|---|
| B43564 | B43564-S9378-M1 | 3,700 µF | 400 VDC | Screw terminal |
| B43564 | B43564-S9488-M1 | 4,800 µF | 400 VDC | Screw terminal |
| B43564 | B43564-S9658-M2 | 6,500 µF | 400 VDC | Screw terminal |
| B43586 | B43586-S4478-Q2 | 4,700 µF | 350 VDC | Screw terminal |
| B43586 | B43586-S3468-Q3 | 4,600 µF | 385 VDC | Screw terminal |
| B43456 | B43456-S5129-M1 | 12,000 µF | 450 VDC | Screw terminal |
| B43456 | B43456-S7338-M1 | 3,300 µF | 550 VDC | Screw terminal |
| B43458 | B43458-S9708-Q1 | 7,000 µF | 400 VDC | Screw terminal |
| B43570 | B43570-C4608-Q | 6,000 µF | 350 VDC | Screw terminal |
| B43701 | B43701-S9338-M1 | 3,300 µF | 400 VDC | Screw terminal |
Selection Considerations
- Preserve the complete ordering code. Hyphens, prefixes, suffixes, tolerance letters, and terminal or mounting extensions can distinguish technically different products.
- Confirm rated capacitance and DC voltage. Do not confuse a DC-link aluminum electrolytic capacitor with an AC film or power-factor-correction capacitor. Surge voltage is not the continuous operating rating.
- Compare ripple current, ESR, and impedance. Use values measured at the frequencies and temperatures relevant to the application. These parameters influence heating, voltage ripple, and expected service life.
- Verify the mechanical envelope. Compare can diameter and length, terminal spacing and thread, clamp requirements, base-stud arrangement, insulation, pressure-relief clearance, busbar geometry, and cabinet space.
- Review temperature and useful-life conditions. A published life value applies only under its stated voltage, ripple-current, temperature, and cooling conditions. Application life should be assessed for the actual load profile.
- Confirm installation and safety requirements. Aluminum electrolytic capacitors are polarized and can retain hazardous energy. Design, discharge, replacement, and commissioning work should be performed by qualified personnel using the manufacturer's current instructions.
Industrial Applications
- DC-link energy storage and smoothing in industrial frequency converters and variable-speed drives
- High-power inverter and rectifier stages
- Uninterruptible power supplies and professional industrial power supplies
- Solar and wind power conversion equipment where the individual series documentation supports the duty
- Industrial maintenance, repair, and refurbishment of installed power-electronic equipment
Final suitability depends on the complete circuit and installation. Bank configuration, balancing, ripple spectrum, inrush current, discharge time, ambient temperature, cooling, vibration, altitude, enclosure design, and protective devices may all affect capacitor selection.
Replacement and Obsolete EPCOS Capacitor Sourcing
Older equipment may reference EPCOS ordering codes that are no longer shown in current product selectors or may carry labels from a previous branding period. Start with clear photographs of the full capacitor marking, terminal end, mounting base, and surrounding installation. Where possible, provide the original datasheet, equipment BOM, schematic reference, former supplier code, and measured case dimensions.
Apexon Supply can support identification and sourcing review for standard, legacy, obsolete, and difficult-to-find EPCOS or TDK EPCOS screw terminal capacitors. When the requested original can be sourced, the quotation should confirm the exact ordering code, condition, quantity, documentation, and commercial terms. If the original is unavailable, an alternative should be treated only as a candidate until capacitance, voltage, ripple current, ESR, dimensions, terminals, mounting, temperature, useful life, and application requirements have been technically approved.
Matching only the headline capacitance and voltage is not sufficient, and a cross-reference does not guarantee form, fit, function, useful life, or regulatory suitability. Final approval belongs with the equipment owner, engineer, or other qualified technical authority.
Why Work With Apexon Supply
- Part-number review: Organization of complete ordering codes, legacy markings, and product-page evidence before quotation.
- Datasheet-led sourcing: Comparison of the electrical, mechanical, thermal, and application fields relevant to the request.
- Difficult-to-find support: Sourcing coordination for current, obsolete, discontinued, or locally unavailable industrial components.
- Global B2B coordination: Support for quantities, documentation requirements, delivery country, and procurement communication.
Apexon Supply is an independent sourcing supplier and is not presented as an authorized TDK or EPCOS distributor or brand affiliate. Current availability, marking, lead time, and documentation must be confirmed for each quotation.
Frequently Asked Questions
What is the difference between a screw terminal and a mounting stud?
Screw terminals are the electrical connection points. A mounting stud is a separate mechanical feature on the base of some cans. Two capacitors can both use screw terminals but require different clamps, studs, or installation hardware.
Can a TDK-marked capacitor replace an EPCOS-marked capacitor?
The marking change alone does not establish interchangeability. TDK Electronics has begun transitioning affected EPCOS product markings, but buyers must still match the complete ordering code and all model-specific electrical and mechanical requirements.
Are B43564 suffixes such as M1, M2, M3, M003, and Q1 equivalent?
No equivalence should be assumed. Preserve the full suffix and verify its meaning in the applicable ordering data or manufacturer documentation before purchase or installation.
Can the same capacitance and voltage guarantee a replacement?
No. Ripple-current capability, ESR, case dimensions, terminal geometry, mounting, temperature rating, useful life, and system duty can differ even when capacitance and rated voltage match.
What should I send for an EPCOS capacitor RFQ?
Provide the complete ordering code, quantity, destination country, required timing, label and terminal photos, capacitance, voltage, dimensions, mounting details, application, equipment information, and any available datasheet or BOM reference.
Does a linked product page confirm stock?
No. The links identify models relevant to this technical sourcing page. Availability, quantity, condition, marking, documentation, price, and lead time require confirmation through a current quotation.
Where can I find other EPCOS product types?
Use the EPCOS product collection for the broader range. The EPCOS capacitor supplier page also covers film capacitors, power-factor-correction products, and power line or EMC filters outside this screw-terminal aluminum electrolytic category.
Request a Quote
Send Apexon Supply the complete EPCOS or TDK EPCOS ordering code, required quantity, destination country, and requested delivery timing. For replacement work, include photos of the full label, terminals, mounting base, and installed position together with the original datasheet, equipment model, application details, and critical dimensions where available.