Cosel PBA1500F-24 – 1500W 24VDC Industrial Switch Mode Power Supply | PBA Series Platform
Engineering Background: The Cosel PBA Series represents Cosel’s flagship open-frame, high-power density switch mode power supply platform, engineered specifically for demanding industrial automation, semiconductor equipment, and medical-adjacent applications. Cosel, headquartered in Japan, has been a benchmark supplier for mission-critical power conversion since 1969, with ISO 9001-certified manufacturing and global safety approvals.
Product Positioning: The PBA1500F-24 delivers 1500W of continuous output at 24VDC, targeting system integrators and OEM equipment builders who require a compact, high-reliability PSU with universal AC input, active PFC, and full safety certification. It is the preferred choice for procurement engineers replacing legacy linear supplies or upgrading from lower-wattage SMPS in control panel builds.
Complete Technical Specifications
- Model: PBA1500F-24
- Manufacturer: Cosel Co., Ltd. (Japan)
- Series: PBA Series
- Output Power: 1500W (continuous)
- Output Voltage: 24VDC (adjustable ±10%)
- Output Current: 62.5A
- Input Voltage: 85–264VAC, 47–63Hz (universal input)
- Input Current: ≤20A @ 115VAC / ≤10A @ 230VAC
- Power Factor: ≥0.98 @ full load (active PFC)
- Efficiency: ≥89% typical @ 230VAC full load
- Inrush Current: ≤60A peak @ 230VAC cold start
- Hold-up Time: ≥20ms @ full load, 200VAC
- Output Ripple & Noise: ≤240mVp-p (20MHz BW)
- Line Regulation: ±0.5%
- Load Regulation: ±1.0%
- Operating Temperature: -10°C to +70°C (derating above 50°C)
- Storage Temperature: -30°C to +85°C
- Humidity: 20–90% RH non-condensing
- Cooling: Built-in variable-speed fan (forced air)
- Protections: OVP, OCP, OTP, short-circuit (auto-recovery)
- Isolation: Input–Output 3000VAC; Input–FG 2000VAC; Output–FG 500VAC
- Safety Certifications: UL 60950-1, CSA C22.2 No.60950-1, EN 60950-1, CE Marking
- EMC: EN 55032 Class B (conducted & radiated), EN 61000-4 series
- MTBF: ≥300,000 hours (MIL-HDBK-217F, 25°C)
- Dimensions (W×H×D): 127 × 63.5 × 279mm (open frame)
- Weight: Approx. 3.06 kg
- Mounting: Chassis / panel mount (screw terminals)
- Remote Sense: Yes
- Remote ON/OFF: Yes
- DC OK Signal: Yes (open collector)
- Parallel Operation: Yes (current sharing)
Proven Application Environments
- Industrial automation control panels and PLC power rails
- Semiconductor wafer handling and inspection equipment
- Robotics and servo drive auxiliary power
- Medical imaging and laboratory instrumentation (non-patient contact)
- Broadcast and telecommunications infrastructure
- Test & measurement systems requiring stable 24V bus
- Factory automation lines with 24/7 continuous duty cycles
Engineering Advantages
- Active PFC ≥0.98 — minimizes harmonic distortion, compliant with IEC 61000-3-2 Class A
- Universal AC Input (85–264VAC) — single SKU for global deployment without input voltage switching
- High Power Density — 1500W in a compact open-frame chassis reduces panel footprint
- Parallel Current Sharing — N+1 redundancy configurations supported without external load-sharing modules
- Variable-Speed Fan — acoustic and thermal optimization; extends fan MTBF under partial load
- Wide Adjustment Range (±10%) — output trimmed 21.6–26.4VDC to match system bus tolerance
- Comprehensive Signal Interface — Remote sense, Remote ON/OFF, DC OK for integration with supervisory PLCs
- Full Safety Suite — UL/CSA/CE certified; accepted by panel builders for UL 508A listed enclosures
System Architecture & Signal Flow
The PBA1500F-24 employs a two-stage conversion topology: Stage 1 — bridgeless active PFC boost converter rectifies and conditions the AC input to a regulated ~400VDC bus. Stage 2 — phase-shifted full-bridge LLC resonant converter steps down to 24VDC with high efficiency and low switching losses. Output is post-regulated via synchronous rectification. The DC OK open-collector signal asserts HIGH when output voltage is within ±10% of set point, enabling direct interface to PLC digital input cards or supervisory relay logic. Remote sense terminals compensate for up to 0.5V cable drop at the load point.
Sourcing & Quality Verification
- Origin: Manufactured by Cosel Co., Ltd., Japan — ISO 9001 certified facility
- Authenticity: All units sourced through authorized distribution channels; serial numbers traceable to Cosel factory records
- Condition: New-in-box (NIB) or factory-refurbished clearly stated per listing
- Inspection: 100% functional burn-in test prior to shipment; output voltage, ripple, and protection circuits verified
- Documentation: Cosel datasheet, test report, and CE Declaration of Conformity available on request
Procurement Process
- Lead Time: In-stock units ship within 1–3 business days; ETA confirmed at order
- MOQ: 1 unit (volume pricing available for ≥5 units — contact sales)
- Payment: T/T, PayPal, credit card; Net-30 available for qualified accounts
- Export: HTS 8504.40 — power supply units; export documentation provided for cross-border shipments
- Warranty: 12 months from shipment date; DOA replacement within 7 days
- RFQ / Bulk Orders: Email support@konmask.com with quantity, delivery address, and required delivery date
Technical FAQ
Q: Can two PBA1500F-24 units be paralleled for 3000W output?
A: Yes. Cosel supports parallel current sharing on the PBA Series. Connect the current-share bus terminals and ensure identical output voltage trim settings. Maximum 2 units in parallel per Cosel application note.
Q: Is the PBA1500F-24 suitable for 48VDC bus applications?
A: No. The -24 suffix denotes a fixed 24VDC nominal output. For 48VDC, specify the PBA1500F-48 variant.
Q: What derating applies above 50°C ambient?
A: Output power must be linearly derated from 100% at 50°C to 50% at 70°C. Consult the Cosel PBA1500F derating curve (available in the datasheet) for intermediate values.
Q: Does the DC OK signal require an external pull-up resistor?
A: Yes. The DC OK output is open-collector; connect a 4.7kΩ–10kΩ pull-up resistor to a 5–24VDC logic supply referenced to the output common.
Q: Is this unit approved for use in UL 508A listed control panels?
A: Yes. The PBA1500F-24 carries UL 60950-1 recognition, which is accepted by most AHJs for use inside UL 508A listed industrial control panels. Verify with your panel shop’s UL inspector for jurisdiction-specific requirements.
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