Phoenix ST-OV/ST-OE Series: Industrial Overvoltage Protection & Signal Conversion Modules - Selection Guide
Product Overview
The Phoenix ST-OV (Overvoltage Protection) and ST-OE (Signal Conversion) Series encompass specialized industrial modules designed for overvoltage suppression and DC-DC signal conversion in automation systems. The ST-OV Series (3-channel OV3, 2-channel OV2) provides reliable overvoltage protection for DC/AC circuits, supporting input/output voltages from 5V DC to 400V AC and current ratings up to 5A. The ST-OE Series (3-channel OE3, 2-channel OE2) focuses on DC-DC signal conversion with fixed 48V DC output and 100mA current, ideal for standardizing sensor/actuator signals. Featuring 35mm DIN rail mounting, robust isolation, and industrial-grade durability, these modules ensure equipment safety and signal stability in manufacturing, process automation, and control cabinet applications.
Model Quick Reference Table
1. ST-OV3 Series (3-Channel Overvoltage Protection)
| Model No. |
Product Name |
Input Voltage |
Output Voltage |
Current Rating |
Key Features |
Application Scenarios |
| 2905417 |
ST-OV3-24DC/400AC/3 |
24V DC |
400V AC |
3A |
3-channel, AC output protection |
24V DC-controlled 400V AC circuit overvoltage suppression |
| 2903202 |
ST-OV3-24DC/220DC/1 |
24V DC |
220V DC |
1A |
3-channel, DC output protection |
24V DC to 220V DC circuit overvoltage protection |
| 2903176 |
ST-OV3-220DC/220DC/1 |
220V DC |
220V DC |
1A |
3-channel, same-voltage protection |
220V DC system overvoltage suppression |
| 2905174 |
ST-OV3-5DC/24DC/2 |
5V DC |
24V DC |
2A |
3-channel, DC-DC protection |
5V DC to 24V DC signal overvoltage protection |
| 2903228 |
ST-OV3-24DC/60DC/3 |
24V DC |
60V DC |
3A |
3-channel, high-current protection |
24V DC to 60V DC high-current circuit protection |
| 2905190 |
ST-OV3-24DC/24DC/2 |
24V DC |
24V DC |
2A |
3-channel, same-voltage protection |
24V DC control circuit overvoltage suppression |
2. ST-OV2 Series (2-Channel Overvoltage Protection)
| Model No. |
Product Name |
Input Voltage |
Output Voltage |
Current Rating |
Key Features |
Application Scenarios |
| 2905035 |
ST-OV2-24DC/60DC/1 |
24V DC |
60V DC |
1A |
2-channel, DC-DC protection |
24V DC to 60V DC small-signal overvoltage protection |
| 2905051 |
ST-OV2-110DC/60DC/1 |
110V DC |
60V DC |
1A |
2-channel, step-down protection |
110V DC to 60V DC circuit overvoltage suppression |
| 2905048 |
ST-OV2-60DC/60DC/1 |
60V DC |
60V DC |
1A |
2-channel, same-voltage protection |
60V DC system overvoltage protection |
| 2905491 |
ST-OV2-24DC/24DC/5 |
24V DC |
24V DC |
5A |
2-channel, high-current protection |
24V DC high-power circuit overvoltage suppression |
| 2905022 |
ST-OV2-12DC/60DC/1 |
12V DC |
60V DC |
1A |
2-channel, step-up protection |
12V DC to 60V DC signal overvoltage protection |
3. ST-OE3 Series (3-Channel DC-DC Signal Conversion)
| Model No. |
Product Name |
Input Voltage |
Output Voltage |
Current Rating |
Key Features |
Application Scenarios |
| 2911045 |
ST-OE3-60DC/48DC/100 |
60V DC |
48V DC |
100mA |
3-channel, step-down conversion |
60V DC to 48V DC sensor signal standardization |
| 2911074 |
ST-OE3-5DC/48DC/100 |
5V DC |
48V DC |
100mA |
3-channel, step-up conversion |
5V DC to 48V DC actuator signal conversion |
| 2911058 |
ST-OE3-24DC/48DC/100 |
24V DC |
48V DC |
100mA |
3-channel, step-up conversion |
24V DC to 48V DC industrial signal conversion |
4. ST-OE2 Series (2-Channel DC-DC Signal Conversion)
| Model No. |
Product Name |
Input Voltage |
Output Voltage |
Current Rating |
Key Features |
Application Scenarios |
| 2911728 |
ST-OE2-220DC/48DC/100 |
220V DC |
48V DC |
100mA |
2-channel, step-down conversion |
220V DC to 48V DC high-voltage signal standardization |
| 2911692 |
ST-OE2-24DC/48DC/100 |
24V DC |
48V DC |
100mA |
2-channel, step-up conversion |
24V DC to 48V DC sensor/actuator signal conversion |
Core Technical Specifications (Universal)
| Parameter |
ST-OV Series (Overvoltage Protection) |
ST-OE Series (Signal Conversion) |
Notes |
| Input Voltage Range |
5V DC~220V DC, 24V DC~400V AC |
5V DC~220V DC |
OV supports AC/DC; OE DC-only |
| Output Voltage |
Matches input (protection) or fixed 48V DC (conversion) |
Fixed 48V DC ±1% |
OE provides standardized 48V DC output |
| Current Rating |
1A~5A |
100mA (per channel) |
OV handles higher currents; OE for low-power signals |
| Protection Functions |
Overvoltage, transient surge, reverse polarity |
Overvoltage, short-circuit |
OV: ≤10ns surge response; OE: overload protection |
| Isolation Voltage |
4kV (input-output) |
2kV (input-output) |
Anti-interference for control systems |
| Operating Temperature |
-25℃~70℃ |
-25℃~70℃ |
Industrial-grade temperature tolerance |
| Mounting Type |
35mm DIN rail (NS 35/7.5) |
35mm DIN rail (NS 35/7.5) |
Compact space-saving installation |
| Protection Class |
IP20 (cabinet mounting) |
IP20 (cabinet mounting) |
Dust-proof for industrial control cabinets |
| Certifications |
CE, UL, CSA |
CE, UL, CSA |
Global industrial compliance |
| Conversion Accuracy |
N/A |
≤±0.5% FS |
OE ensures precise signal standardization |
Application Scenarios & Recommended Models
1. 24V DC High-Current Overvoltage Protection (5A)
- Requirement: 2-channel overvoltage suppression for 24V DC high-power circuits
- Recommended Model: 2905491 (ST-OV2-24DC/24DC/5)
- Key Reason: 5A high-current capacity; same-voltage protection for 24V DC systems
2. 24V DC to 48V DC Signal Conversion (3-Channel)
- Requirement: 3-channel step-up conversion for standardizing 24V DC sensor signals to 48V DC
- Recommended Model: 2911058 (ST-OE3-24DC/48DC/100)
- Key Reason: 3-channel density; 100mA output; ≤±0.5% conversion accuracy
3. 400V AC Circuit Overvoltage Protection (24V DC Control)
- Requirement: 3-channel overvoltage protection for 400V AC circuits controlled by 24V DC
- Recommended Model: 2905417 (ST-OV3-24DC/400AC/3)
- Key Reason: AC/DC cross-protection; 3A current rating; 4kV isolation
4. 60V DC System Overvoltage Protection (2-Channel)
- Requirement: 2-channel overvoltage suppression for 60V DC industrial systems
- Recommended Model: 2905048 (ST-OV2-60DC/60DC/1)
- Key Reason: Same-voltage protection; compact 2-channel design
5. 220V DC to 48V DC High-Voltage Conversion (2-Channel)
- Requirement: 2-channel step-down conversion for 220V DC high-voltage signals to 48V DC
- Recommended Model: 2911728 (ST-OE2-220DC/48DC/100)
- Key Reason: High-input voltage compatibility; 100mA standardized output
Core Advantages
- Dual Functional Series: OV (overvoltage protection) and OE (signal conversion) cover complementary system needs
- Wide Voltage Coverage: 5V DC~400V AC input/output fits diverse industrial circuits
- Channel Flexibility: 2-channel/3-channel options optimize space for small-to-medium scale applications
- Industrial-Grade Reliability: -25℃~70℃ operating temperature, 2kV~4kV isolation, and IP20 protection
- Precision Conversion: OE series with ≤±0.5% accuracy ensures standardized signal output
- High-Current Support: OV series up to 5A handles high-power circuit protection
- Easy Installation: 35mm DIN rail mounting and standardized wiring for quick deployment
- Global Compliance: CE/UL/CSA certifications enable international deployment
Installation & Usage Notes
- Voltage Matching: Ensure input/output voltage aligns with module ratings (OV supports AC/DC; OE is DC-only)
- Current Limitation: Do not exceed OV current rating (1A~5A) or OE 100mA per channel limit
- Wiring Specifications: Use 0.5~2.5mm² conductors for OV (high-current) and 0.14~0.75mm² for OE (low-current)
- Isolation Wiring: Separate input/output wiring by ≥10mm to maximize isolation effectiveness
- Mounting Spacing: Reserve ≥5mm between modules for heat dissipation, especially for OV high-current variants
- Surge Protection Placement: Install OV modules close to protected devices for optimal transient suppression
- Conversion Calibration: For OE models, verify 48V DC output post-installation (±1% tolerance)
- Environmental Protection: Install in dry, dust-free control cabinets (IP20 protection); avoid moisture/corrosive substances
