.svg&w=240){kind=small}
Wago
857-420Isolation amplifier; Current input signal; Current and voltage output signal; Supply voltage: 24 VDC; 6 mm module width; 2,50 mm²
Wago 857-451
Passive isolator, 1-channel; Current input signal; Current output signal; Power via input; 6 mm module width; 2,50 mm²
- MPN
- 857-451
Price and lead time confirmed within 1 business day
Request a Quote
- 12-month warranty (new) · 3-month (used/refurbished)
- 30-day returns, no restocking fee on unused parts
- Ships via
What is the Wago 857-451?
Short description:
WAGO's passive isolator (1‐channel) electrically isolates and filters 0(4) … 20 mA standard analog signals, while drawing power for signal transmission from the input circuit. The connected sensor supplies the passive isolator with the required power to energize the connected load.
Features:
No additional supply voltage required
3-way electrical isolation with 2.5 kV test voltage
Specifications
Notes
| Safety Information | Outputs must not be left open! |
| Note | Use shielded signal cables!Only use shielded signal cables for analog input and output signals.This ensures the device maintains its specified accuracy and immunity to interference, even when external disturbances affect the signal cable. |
Technical data - Configuration
| Configuration options | Pre-configured |
Technical data - Input
| Input signal type | Current, Current |
| Input signal (current) | 0 … 20 mA, 4 … 20 mA |
| Input current (max.) | 40 mA |
| Input voltage (max.) | 20 V |
| Response threshold | 200 µA |
Technical data - Output (analog)
| Output signal type | Current, Current |
| Output signal (current) | 0 … 20 mA, 4 … 20 mA |
| Load impedance (current output) | ≤ 600 Ω Temperature range restrictions may occur. |
Technical data - Output (voltage tap)
| Voltage drop | ≤ 2.5 V (at 20 mA at the output) |
Technical data - Signal processing
| Limit frequency | 100 Hz |
| Step response (typ.) | 3.5 ms |
Technical data - Measurement error
| Transmission error (typ.) | ≤ 0.1 % of upper-range value |
| Load error | ≤ 0.05 % of upper-range value; per 100 Ω load |
| Temperature coefficient | ≤ 0.01 %/K |
Technical data - Power supply
| Power supply type | Passive (via input) |
Safety and protection
| Rated voltage | 300 V |
| Measurement category per EN/UL 61010-2-030 | CAT II (input) |
| Overvoltage category | II |
| Pollution degree | 2 |
| Protection type | IP20 |
Safety and protection - Test voltage
| Test voltage (input/output) | AC 3 kV; 50 Hz; 1 min |
Safety and protection - Insulation coordination (UL)
| Insulation type (input/analog output) | Reinforced insulation (safe isolation) |
Connection data
| Connection technology | Push-in CAGE CLAMP® |
| Solid conductor | 0.08 … 2.5 mm² / 28 … 14 AWG |
| Fine-stranded conductor | 0.34 … 2.5 mm² / 22 … 14 AWG |
| Strip length | 9 … 10 mm / 0.35 … 0.39 inches |
| Cable type | Shielded cable |
Physical data
| Width | 6 mm / 0.236 inches |
| Height | 94 mm / 3.701 inches |
| Depth from upper-edge of DIN-rail | 97.8 mm / 3.85 inches |
Mechanical data
| Mounting type | DIN-35 rail, DIN-35 rail |
Material data
| Insulation material (main housing) | Polyamide (PA66) |
| Flammability class per UL94 | V0 |
| Fire load | 0.363 MJ |
| Weight | 24.7 g |
Environmental requirements
| Ambient temperature (operation) | -25 … +70 °C |
| Ambient temperature (storage) | -40 … +85 °C |
| Temperature range of connection cable | ≥ (Tambient + 15 K) |
| Temperature range of the connection cable (UL) | 70 °C |
| Relative humidity | 5 … 95 % (no condensation permissible) |
| Operating altitude (max.) | 2000 m |
Standards and specifications
| Conformity marking | CE |
| EMC immunity to interference | EN 61000-6-2 |
| EMC emission of interference | EN 61000-6-3 |
| Standards/specifications | EN 61010-1, DNV |
Commercial data
| Product Group | 6 (INTERFACE ELECTRONIC) |
| PU (SPU) | 1 pcs |
| Packaging type | Bag |
| Country of origin | DE |
| GTIN | 4045454471323 |
| Customs tariff number | 85437090300 |
Product Classification
| UNSPSC | 39121008 |
| eCl@ss 10.0 | 27-21-01-20 |
| eCl@ss 9.0 | 27-21-01-20 |
| ETIM 9.0 | EC002653 |
| ETIM 10.0 | EC002653 |
| ECCN | NO US CLASSIFICATION |
Environmental Product Compliance
| RoHS Compliance Status | Compliant,No Exemption |
857-451: frequently asked questions
When can 857-451 be shipped?
857-451 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up 857-451 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for 857-451 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 857-451, subject to availability and destination.
More Wago parts
Wago
857-423Isolation amplifier; Current and voltage input signal; 2 x current output signal; Supply voltage: 24 VDC; 6 mm module width; 2,50 mm²
Wago
857-424Isolation amplifier; Current and voltage input signal; Supply voltage: 24 VDC; 6 mm module width
Wago
857-450Loop-powered isolation amplifier; Bipolar current and voltage input signal; Current output signal; Configuration via DIP switch; Power supply via output; 6 mm module width; 2,50 mm²
Wago
857-452Passive isolator, 2-channel; 2 x current input signal; 2 x current output signal; Power via input; 6 mm module width; 2,50 mm²
Wago
857-500Frequency signal conditioner; Current and voltage output signal; Configuration via software; Supply voltage: 24 VDC; 6 mm module width
Wago
857-531Threshold value switches; Analog values; 1 changeover contact; Digital output; Configuration via software; Supply voltage: 24 VDC; 6 mm module width; 2,50 mm²
Wago
857-550Current signal conditioner; Current input signal; Current and voltage output signal; Digital output; Configuration via software; Supply voltage: 24 VDC; 6 mm module width; 2,50 mm²
Wago 857-451Price and lead time confirmed within 1 business day
Request a Quote