Contactors for Data Center PDU and UPS Systems: Selection Guide
AC-1 and AC-6a contactors for data center PDU and UPS systems: sizing, harmonic derating, coil selection, and endurance guidance for engineers. Shop at Stoklink.
- Part number
- CA2KN31E7
- Model no
- CA2K
- UL
- CSA
- CE
- UKCA
- CCC
- EAC
- CB Scheme
Schneider TeSys KSchneider Electric CA2KN31E7 TeSys K Control Relay 3NO 1NC 48 V AC Coil Screw Clamp Auxiliary Contactor
TeSys K control relay, 3NO+1NC, 10 A Ith, 48 V AC coil, screw clamp terminals, DIN rail or panel mount.
Description
About the CA2K
About the CA2K
The Schneider Electric CA2KN31E7 is a TeSys K control relay with 3NO+1NC contact composition and a 48 V AC coil, rated 10 A conventional thermal current (Ith) at up to 690 V. It switches AC-15 and DC-13 electromagnetic loads for pilot-circuit control, interlocking and signal duplication, with screw clamp terminals for DIN rail or panel mounting.
Certifications & Standards
- CE
- UKCA
- UL
- CSA
- CCC
- EAC
- IEC 60947-5-1
Selection Notes
The 3NO+1NC contact composition gives three make contacts for parallel command signals alongside one break contact for interlocking or indication. Pick the 48 V AC coil when the control circuit already runs at that voltage; using a coil voltage matching the existing control transformer tap avoids an extra step-down winding. The AC coil pulls in within 10–20 ms and draws 30 VA at inrush, dropping to 4.5 VA hold-in, which is the standard figure to size a shared control transformer against when several of these relays switch together.
Specification
Full specification
Main 10
| Range | TeSys |
|---|---|
| Product name | TeSys CAK |
| Product or Component Type | Control relay |
| Device short name | CA2K |
| Contactor application | Control circuit |
| Utilisation category | AC-15, DC-13 |
| Pole contact composition | 3 NO + 1 NC |
| [Ue] rated operational voltage | <= 690 V <= 400 Hz |
| Control circuit type | AC 50/60 Hz |
| [Uc] control circuit voltage | 48 V AC 50/60 Hz |
Complementary 23
| [Ith] conventional free air thermal current | 10 A (at 122 °F (50 °C)) |
|---|---|
| Irms rated making capacity | 110 A IEC 60947 |
| Associated fuse rating | 10 A gG conforming to IEC 60947, 10 A gG conforming to VDE 0660 |
| [Ui] rated insulation voltage | 690 V IEC 60947, 750 V VDE 0110 group C, 690 V BS 5424, 600 V CSA C22.2 No 14 |
| Mounting Support | Plate, Rail |
| Connections - terminals | screw clamp terminals 1 0.002…0.006 in² (1.5…4 mm²)solid, screw clamp terminals 2 0.002…0.006 in² (1.5…4 mm²)solid, screw clamp terminals 1 0.001…0.006 in² (0.75…4 mm²)flexible with cable end, screw clamp terminals 2 0.001…0.006 in² (0.75…4 mm²)flexible without cable end, screw clamp terminals 1 0.0005…0.002 in² (0.34…1.5 mm²)flexible with cable end, screw clamp terminals 2 0.0005…0.002 in² (0.34…1.5 mm²)flexible without cable end |
| Tightening torque | 11.5 lbf.in (1.3 N.m) screw clamp terminals flat Ø 6 mm, 11.5 lbf.in (1.3 N.m) screw clamp terminals Philips No 2 0.2 in (6 mm), 11.5 lbf.in (1.3 N.m) screw clamp terminals pozidriv No 2 |
| Control circuit voltage limits | Drop-out: 0.2...0.75 Uc (at <122 °F (50 °C)), Operational: 0.8...1.15 Uc (at <122 °F (50 °C)) |
| Operating time | 10...20 ms coil de-energisation and NO opening, 10...20 ms coil energisation and NO closing, 15...25 ms coil de-energisation and NC closing, 5...15 ms coil energisation and NC opening |
| Mechanical durability | 10 Mcycles |
| Maximum operating rate | 10000 cyc/h |
| Immunity to microbreaks | 2 ms |
| Inrush power in VA | 30 VA (at 68 °F (20 °C)) |
| Hold-in power consumption in VA | 4.5 VA (at 68 °F (20 °C)) |
| Heat dissipation | 1.3 W |
| Minimum switching voltage | 17 V |
| Minimum switching current | 5 mA |
| Non overlap distance | 0.02 in (0.5 mm) |
| Insulation resistance | > 10 MOhm |
| Height | 2.3 in (58 mm) |
| Width | 1.8 in (45 mm) |
| Depth | 2.2 in (57 mm) |
| Net Weight | 0.40 lb(US) (0.18 kg) |
Environment 9
| Standards | EN/IEC 60947-5-1, GB/T 14048.5, UL 60947-5-1, CSA C22.2 No 60947-5-1, JIS C8201-5-1 |
|---|---|
| Product Certifications | CB Scheme, CCC, UL, CSA, EAC, CE, UKCA |
| IP degree of protection | IP2X |
| Protective treatment | TC IEC 60068 |
| Ambient Air Temperature for Operation | -13…122 °F (-25…50 °C) |
| Ambient Air Temperature for Storage | -58…176 °F (-50…80 °C) |
| Operating altitude | 6561.68 ft (2000 m) without derating |
| Flame retardance | V1 conforming to UL 94, Requirement 2 conforming to NF F 16-101, Requirement 2 conforming to NF F 16-102 |
| Mechanical robustness | Vibrations contactor open2 Gn, 5...300 Hz IEC 60068-2-6, Vibrations contactor closed4 Gn, 5...300 Hz IEC 60068-2-6, Shocks contactor open10 Gn for 11 ms IEC 60068-2-27, Shocks contactor closed15 Gn for 11 ms IEC 60068-2-27 |
Show all 56 specifications ↓ Show less ↑14 more values in Identification, Contractual warranty, Logistics.
Identification 8
| Part number | CA2KN31E7 |
|---|---|
| Type designation | CA2K |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 3389110500356 |
Contractual warranty 1
| Warranty (in months) | 18 |
|---|
Logistics 5
| Country of origin | ID |
|---|---|
| Shipping weight | 0.18 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
Documents
Documents for CA2KN31E7
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- UL
- CSA
- CE
- UKCA
- CCC
- EAC
- CB Scheme
- EN/IEC 60947-5-1
- GB/T 14048.5
- UL 60947-5-1
- CSA C22.2 No 60947-5-1
- JIS C8201-5-1
Quick answers
Questions about the CA2K
What is the rated current of CA2K?
The rated current of CA2K is 10 A.
Which supply voltage is CA2K rated for?
The rated operational voltage of CA2K is 48 V AC.
What is the HS code of CA2K for customs?
The tariff (HS) code on file for CA2K is 853650.
What is the EAN of CA2K?
The EAN (GTIN) of CA2K is 3389110500356.
Where does CA2K ship from, and how fast?
CA2K ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
Guides for contactors
NEMA vs IEC Contactor Standards: Key Differences and Size Comparison
Compare AC3 rating IEC contactors versus NEMA size codes, with cross-reference tables, derating formulas, and selection tips for engineers. Shop at Stoklink.
How to Select the Right Contactor for Your Application: Complete Checklist
Master AC3 rating selection with our complete contactor checklist covering load sizing, utilization categories, derating, and coordination. Shop at Stoklink.
Reviews
Customer reviews
Series
Schneider Electric Schneider TeSys K
- Brand
- Schneider Electric
- Series
- Schneider TeSys K
