JULABO SC2500a SemiChill Circulating Chiller

Overview

The JULABO SC2500a SemiChill Circulating Chiller is an air-cooled, high-precision temperature control system engineered specifically for demanding thermal management applications in semiconductor manufacturing, electronics R&D, automotive testing, and advanced energy systems. Based on Julabo’s proven SemiChill platform, the SC2500a implements a closed-loop refrigeration architecture utilizing a hermetically sealed scroll compressor, high-efficiency microchannel condenser, and PID-controlled electronic expansion valve. It operates across a wide temperature span of −20 °C to +80 °C with exceptional stability (±0.1 °C), enabling precise thermal conditioning of process fluids—such as deionized water, aqueous glycol mixtures, Thermal G®, or other non-conductive dielectric coolants—without reliance on municipal tap water. Its compact footprint (49 × 62 × 105 cm) and modular internal layout support integration into cleanroom environments, wafer probe stations, laser diode test benches, and automated reliability test chambers.

Key Features

• Robust stainless-steel and chemically resistant polymer wetted components compliant with semiconductor-grade fluid compatibility requirements (e.g., ASTM F2217 for ultra-pure coolant handling)
• High-performance circulation pump delivering up to 33 L/min at 3.5 bar, with stepwise adjustable flow and pressure settings via front-panel keypad and real-time bar-graph display
• Integrated external Pt100 sensor input for remote bath or process-point feedback, supporting cascade control configurations per IEC 61508 functional safety principles
• Dual-stage overtemperature, low-level, and overpressure protection circuits for both refrigeration and pumping subsystems
• RS232 serial interface supporting ASCII command protocol for integration into SCADA, MES, or LabVIEW-based automation frameworks; compatible with MODBUS RTU upon firmware upgrade
• LED-display interface with 0.1 °C resolution, programmable ramp/soak profiles (1×10 segments), and event logging with time-stamped error codes
• Low-noise operation (≤65 dB[A] at 1 m) meeting DIN 45635-16 acoustic emission limits for laboratory and controlled industrial spaces

Sample Compatibility & Compliance

The SC2500a is validated for continuous-duty operation with electrically non-conductive heat transfer media essential in semiconductor equipment cooling—including ultrapure water (UPW), 30/70 v/v ethylene glycol/water blends, and proprietary dielectric fluids meeting SEMI F57 specifications. All fluid-contact surfaces conform to USP Class VI and FDA 21 CFR Part 11 material traceability standards where applicable. The unit complies with EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions), carries CE marking under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, and meets DIN 12876-1 Class III (FL) classification for laboratory refrigeration equipment. Optional IQ/OQ documentation packages are available to support GLP/GMP validation protocols.

Software & Data Management

While the SC2500a operates autonomously via its embedded controller, its RS232 interface enables bidirectional communication for remote parameter setting, real-time data streaming (temperature, flow, pressure, compressor status), and alarm acknowledgment. Julabo’s optional WinTherm software (v4.0+) supports multi-unit monitoring, trend analysis, and export to CSV or PDF formats compliant with ISO/IEC 17025 reporting requirements. Audit trail functionality—including user login history, parameter change logs, and calibration event records—is implemented in accordance with FDA 21 CFR Part 11 Annex 11 principles when used with validated IT infrastructure.

Applications

• Thermal stabilization of photolithography steppers, e-beam writers, and metrology tools requiring sub-0.1 °C thermal drift control
• Cooling of high-power laser diodes, RF amplifiers, and power electronics modules in EV battery testing and 5G infrastructure development
• Temperature conditioning of thermal interface material (TIM) testers and die-attach process simulators
• Supporting environmental stress screening (ESS) chambers and HALT/HASS test systems per MIL-STD-810 and JEDEC JESD22-A108
• Integration into automated wafer-level testing platforms where ESD-safe, non-conductive coolant delivery is mandatory

FAQ

What types of heat transfer fluids are certified for use with the SC2500a?
Deionized water, 20–50% ethylene glycol/water solutions, Thermal G®, and other non-conductive, low-conductivity (<5 µS/cm) coolants meeting SEMI F57 purity criteria.
Does the SC2500a support external temperature feedback for closed-loop process control?
Yes—it features a dedicated Pt100 input channel enabling external sensor integration for cascade or master-slave control architectures.
Is the unit suitable for cleanroom Class 100 (ISO 5) environments?
The SC2500a meets particle emission requirements per ISO 14644-1 when installed with appropriate filtration and venting; full cleanroom qualification requires site-specific validation.
Can the chiller be integrated into a centralized facility monitoring system?
Via RS232 ASCII protocol or optional RS485/MODBUS RTU module, it supports integration with BMS, MES, and PLC-based infrastructure.
What maintenance intervals are recommended for continuous 24/7 operation?
Compressor oil and refrigerant integrity checks every 12 months; filter replacement and system flush every 24 months—per Julabo Service Bulletin SB-SC2500a-2023.