Siemens 3VA9978-0AA12 Auxiliary Switch, Type HQ (7mm) Changeover Contacts for 3VA4/5/6 Series Original Brand New
$99.24
High-quality (Type HQ) auxiliary switch with changeover contacts. Designed specifically as a 7mm space-saving accessory, it provides reliable remote status signaling for Siemens 3VA4, 3VA5, and 3VA6 molded case circuit breakers (MCCB).
Availability: In stock
Overview
The Siemens 3VA9978-0AA12 is an essential internal accessory for the 3VA series of molded case circuit breakers. This Type HQ (High Quality) auxiliary switch allows for the integration of the circuit breaker into automation and monitoring systems by signaling the mechanical position of the main contacts. Its compact 7mm width ensures it fits seamlessly into the designated accessory slots without compromising space.
Key Benefit
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Seamless Integration: Purpose-built for 3VA4, 3VA5, and 3VA6 frames.
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Space Efficient: The 7mm Type HQ design allows for multiple accessories to be installed in the breaker.
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Enhanced Monitoring: Provides real-time feedback on whether the breaker is “ON” or “OFF” to your control system or PLC.
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High Reliability: Manufactured by Siemens to meet rigorous industrial standards for long-term electrical durability.
Function & Application
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Remote Signaling: Uses changeover contacts (CO) to send signals to pilot lights, buzzers, or PLC inputs.
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Status Tracking: Enables remote monitoring of circuit breaker status in industrial switchboards and control panels.
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Versatile Compatibility: Works across the 3VA4 (125A), 3VA5 (125A-250A), and 3VA6 (150A-600A) global 3VA ranges.
Technical Specification
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Product Number: 3VA9978-0AA12
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Brand: Siemens
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Product Type: Auxiliary Switch
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Contact Type: Changeover Contacts
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Type: HQ
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Width: 7 mm
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Compatibility: Siemens 3VA4, 3VA5, 3VA6
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Application: Circuit breaker accessory
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| Weight | 0.027 kg |
|---|---|
| Dimensions | 175.00 × 100.00 × 8.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | auxiliary switch |
| Product version | Accessories for 3VA circuit breakers |
| Accessories | Auxiliary switch |
| Degree of pollution | 3 |
| Overvoltage category | III |
| rated insulation voltage Ui | 690 V |
| Tension assignée de tenue aux chocs | 4 kV |
| operating voltage / at AC / acc. to CSA and UL | 300 V |
| operating voltage / at DC / acc. to CSA and UL | 250 V |
| Rated operational voltage Ue at AC 50 Hz | 240 V |
| Rated operational voltage Ue with DC | 250 V |
| Thermal current limit Ith | 6 A |
| operational current | – |
| ● at AC-12 / at 12 V | 6 A |
| ● at AC-12 / at 24 V | 6 A |
| ● at AC-12 / at 48 V | 6 A |
| ● at AC-12 / at 125 V | 6 A |
| ● at AC-12 / at 220/240 V | 6 A |
| ● at DC-12 / at 12 V | 6 A |
| ● at DC-12 / at 24 V | 4 A |
| ● at DC-12 / at 48 V | 2 A |
| ● at DC-12 / at 110 V | 0.5 A |
| ● at DC-12 / at 250 V | 0.25 A |
| ● at DC-13 / at 12 V | 1 A |
| ● at DC-13 / at 24 V | 0.8 A |
| ● at DC-13 / at 48 V | 0.4 A |
| ● at DC-13 / at 110 V | 0.2 A |
| ● at DC-13 / at 250 V | 0.1 A |
| ● at AC-15 / at 12 V | 3 A |
| ● at AC-15 / at 24 V | 3 A |
| ● at AC-15 / at 48 V | 3 A |
| ● at AC-15 / at 125 V | 3 A |
| ● at AC-15 / at 220/240 V | 3 A |
| width / note | 1 slot (7 mm) |
| tightening torque / with screw-type terminals / minimum | 0.4 N·m |
| tightening torque / with screw-type terminals / maximum | 0.5 N·m |
| stripped length | 15 mm |
| AWG number / as coded connectable conductor cross section / for auxiliary contacts | – |
| ● minimum | 20 |
| ● maximum | 16 |
| stripped length [in] | 0.6 in |
| tightening torque [lbf·in] / with screw-type terminals / minimum | 3.5 lbf·in |
| tightening torque [lbf·in] / with screw-type terminals / maximum | 4.4 lbf·in |
| last modified: | 12/20/2020 |
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