Overview
The FSP350-70PFL (SK) is a 350 W ATX industrial switching power supply designed for IPC, server, workstation, automation, and communication applications.
In industrial environments, unexpected power interruptions can lead to system downtime, data loss, or service interventions. This model is specified to support stable long-term operation in such use cases.
Key characteristics include:
- 350 W total output power
- 80 PLUS Bronze efficiency class
- Active PFC (Power Factor Correction)
- Full-range 90–264 VAC input (47–63 Hz)
- Industrial qualification screening (burn-in and Hi-pot testing)
- Specified MTBF of 100,000 hours (25°C, per MIL-HDBK-217)
Ripple & Noise Performance
For industrial computing systems that integrate storage, I/O modules, and communication cards, output stability is a relevant design parameter.
The specification defines ripple and noise limits of:
- 50 mV p-p on +3.3 V and +5 V
- 120 mV p-p on +12 V rails
These values are intended to support stable operation under dynamic load conditions typically seen in IPC and embedded applications.
Protection Features & Fault Behavior
The protection concept includes:
- Output over-voltage protection (OVP)
- Short-circuit protection (SCP) on all outputs
- Resettable power shutdown behavior
In the event of a fault condition, the shutdown mechanism is designed to allow recovery after the issue has been resolved. This can support maintenance workflows in distributed or cabinet-based installations.
Reliability & Qualification Screening
For 24/7 industrial environments, the datasheet specifies the following qualification measures:
- 100% burn-in at 50°C
- 100% Hi-pot testing
The reliability reference is:
- MTBF: 100,000 hours
- Based on MIL-HDBK-217
- At 25°C
- At maximum load
- Nominal AC input
As with all MTBF figures, this represents a statistical reference value under defined conditions rather than a guaranteed service life.
Mechanical Dimensions
The mechanical format corresponds to standard PS/2 ATX dimensions:
- 140 mm (L) × 150 mm (W) × 86 mm (H)
This supports integration into common industrial ATX and IPC chassis designs.
Where the FSP350-70PFL (SK) Fits Best
- IPC PSU upgrades where universal input and predictable protection behavior reduce support effort across sites.
- Automation and communication equipment needing low ripple and noise output for stable I/O and storage operation.
- Server and workstation power system builds that value 80 Plus Bronze efficiency, active PFC circuit, and documented reliability screening.
Typical Application Areas
The FSP350-70PFL (SK) may be suitable for:
- Industrial PC (IPC) platforms
- Automation control cabinets
- Communication systems
- Entry-level server or workstation builds
- Retrofit or PSU replacement projects requiring universal AC input
Final suitability should always be verified against the system’s load profile and environmental conditions.
FAQ
Is the FSP350-70PFL (SK) suitable for global installations?
Yes. The specified 90–264 VAC input range (47–63 Hz) allows deployment across regions without changing PSU variants.
How does it differ from a consumer ATX PSU?
According to the documentation, the unit is positioned as an industrial switching power supply and includes defined qualification screening (50°C burn-in, Hi-pot testing) and a specified MTBF reference value. These parameters are typically relevant in industrial IPC environments.
Which protection mechanisms are included?
The PSU includes OVP and SCP on all outputs, along with a resettable shutdown behavior designed to support recovery after fault clearance.
How does it support stable operation for sensitive loads?
The specification defines ripple and noise limits of 50 mV p-p (3.3 V / 5 V) and 120 mV p-p (12 V rails), which are relevant parameters for storage devices, communication cards, and control electronics.
Support for System Integration
When qualifying the FSP350-70PFL (SK) for an IPC, server, or industrial controller project, technical documentation review and integration planning are recommended to ensure compatibility with load profiles, thermal conditions, and compliance requirements.
TPS Elektronik can provide support during PSU selection and documentation alignment within industrial system designs.
