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Wago
787-785Redundancy Module; 2 x 9 … 54 VDC input voltage; 2 x 40 A input current; 9–54 VDC output voltage; 76 A output current
Wago 787-821
Switched-mode power supply; Pro; 1-phase; 12 VDC output voltage; 10 A output current; TopBoost + PowerBoost; DC OK contact
- MPN
- 787-821
- Category
- Power Supplies
Price and lead time confirmed within 1 business day
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- 12-month warranty (new) · 3-month (used/refurbished)
- 30-day returns, no restocking fee on unused parts
- Ships via
What is the Wago 787-821?
Features:
Switched-mode power supply with PowerBoost and TopBoost
Switch off the output and minimize power consumption via stand-by input
Output monitoring via DC OK contact
Suitable for both parallel and series operation
Natural convection cooling when horizontally mounted
Encapsulated for use in control cabinets
Electrically isolated output voltage (SELV) per UL 60950-1; PELV per EN 60204
Specifications
Technical data - Input
| Phases | 1 |
| Nominal input voltage U<sub>i nom</sub> | 1 x 100 … 240 VAC |
| Input voltage range | 1 x 85 … 264 VAC; 120 … 300 VDC |
| Input voltage derating | -5 %/V (< 95 VAC) |
| Nominal mains frequency range | 50 … 60 Hz; 0 Hz |
| Input current I<sub>i</sub> | ≤ 0.97 A (240 VAC; 10 ADC) |
| Inrush current | ≤ 30 A (peak) |
| Power factor correction (PFC) | Passive |
| Mains failure hold-up time | ≥ 35 ms (230 VAC) |
Technical data - Output
| Nominal output voltage U<sub>o nom</sub> | 12 VDC (SELV) |
| Output voltage range | 11 … 18 VDC (adjustable) |
| Default setting | DC 12 V |
| Nominal output current I<sub>o nom</sub> | 10 A (12 VDC) |
| Nominal output power | 120 W |
| Deviation | ≤ 1 % |
| Residual ripple | ≤ 70 mV (peak-to-peak) |
| Current limitation | 1.1 x Io nom (typ.) |
| Overload behavior | TopBoost/PowerBoost/Constant current mode |
| PowerBoost | DC 20 A (4 s); DC 15 A (8 s) |
| TopBoost | 60 ADC (25 ms); 40 ADC (25 ms; Ui < 110 VAC) |
Technical data - Signaling and communication
| Signaling | 1 x DC OK LED (green), 1 x Error LED (red), 1 x Stand-by input, 1 x DC OK relay contact (changeover contact) |
| Operation status indicator | Green LED (DC OK), Red LED (error) |
Technical data - Efficiency/power losses
| Power loss P<sub>l</sub> | ≤ 0.5 W (standby); ≤ 5 W (no load); ≤ 14.6 W (nominal load) |
| Efficiency (typ.) | 87.8 % |
Technical data - Circuit protection
| Internal fuse | T 4 A / 250 VAC |
| Pre-fuse (required) | An external DC fuse is required for the DC input voltage. |
| Backup fuse (recommended) | Circuit breaker: 6 A, 10 A, 16 A; Tripping characteristic: B or C |
Safety and protection
| Isolation voltage (sec.-PE) | 0.7 kVDC |
| Protection class | I |
| Protection type | IP20; per EN 60529 |
| Resistance to reverse feed | ≤ 25 VDC |
| Overvoltage category | II |
| Pollution degree | 2 |
| Transient suppression (primary) | Varistor |
| Short-circuit-protected | Yes |
| Open-circuit-proof | Yes |
| Parallel operation | Yes |
| Series operation | Yes |
| MTBF | > 500,000 h (per IEC 61709) |
Connection data - Connection 1
| Connection type | Input/output |
| Connection technology | CAGE CLAMP® |
| WAGO connector | WAGO 231 Series |
| Solid conductor | 0.08 … 2.5 mm² / 28 … 12 AWG |
| Fine-stranded conductor | 0.08 … 2.5 mm² / 28 … 12 AWG |
| Strip length | 8 … 9 mm / 0.31 … 0.35 inches |
Connection data - Connection 2
| Connection type | Signaling |
| Connection technology | CAGE CLAMP® |
| WAGO connector | WAGO 733 Series |
| Solid conductor | 0.08 … 0.5 mm² / 28 … 20 AWG |
| Fine-stranded conductor | 0.08 … 0.5 mm² / 28 … 20 AWG |
| Strip length | 5 … 6 mm / 0.2 … 0.24 inches |
Physical data
| Width | 57 mm / 2.244 inches |
| Height | 163 mm / 6.417 inches |
| Depth from upper-edge of DIN-rail | 163 mm / 6.417 inches |
| Note (dimensions) | Height with connector |
Mechanical data
| Mounting type | DIN-35 rail |
Material data
| Weight | 1295 g |
Environmental requirements
| Ambient temperature (operation) | -25 … +70 °C (Device starts at -40 °C (type-tested)) |
| Ambient temperature (storage) | -25 … +85 °C |
| Relative humidity | 5 … 96 % (no condensation permissible) |
| Derating | −3 %/K (> 50 °C) |
| Climatic category | 3K3 (per EN 60721) |
Standards and specifications
| Conformity marking | CE |
| Standards/specifications | EN 61010-1, EN 61010-2-201, EN 61204-3, EN 61558-2-16, UL 60950, UL 508 |
Commercial data
| Product Group | 6 (INTERFACE ELECTRONIC) |
| PU (SPU) | 1 pcs |
| Packaging type | box |
| Country of origin | DE |
| GTIN | 4050821226482 |
| Customs tariff number | 85044083900 |
Product Classification
| UNSPSC | 39121004 |
| eCl@ss 10.0 | 27-04-07-01 |
| eCl@ss 9.0 | 27-04-07-01 |
| ETIM 9.0 | EC002540 |
| ETIM 10.0 | EC002540 |
| ECCN | NO US CLASSIFICATION |
Environmental Product Compliance
| RoHS Compliance Status | Compliant,No Exemption |
787-821: frequently asked questions
When can 787-821 be shipped?
787-821 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 787-821 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 787-821 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 787-821, subject to availability and destination.
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Wago 787-821Price and lead time confirmed within 1 business day
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