1. Automation/Motion Controls For Sale
  2. sku: 15761872874692602
  3. SIEMENS 18HSK92NF51

SIEMENS 18HSK92NF51 Combination Starter Disconnect Nema Starter/disconnect 100AMP 3PH 600VAC 12/4

18hsk92nf51 Siemens Combination Starter/disconnect 100amp 3ph 600vac Nema 12/4

( Brand: Siemens ), ( Manufacturer Part Number: 18HSK92NF51 ), ( Part Type: Starter ), ( Custom Bundle: No ), ( Country Of Manufacture: United States ), ( Modified Item: Yes )

Review SIEMENS Combination Starter/disconnect 100amp 3ph 600vac Nema 12/4

The **Siemens 18HSK92NF51 Combination Starter/Disconnect** is a robust, high-performance electrical control device engineered for demanding industrial, commercial, and heavy-duty applications requiring reliable motor protection, phase monitoring, and remote control capabilities. Designed with Siemens signature precision and durability, this **100-ampere, three-phase (3P) combination starter** integrates a **NEMA 12/4-rated enclosure**, ensuring superior protection against dust, dirt, and light corrosive environments while maintaining operational efficiency in temperatures ranging from -20 C to 55 C. The unit is rated for **600V AC operation**, making it suitable for a wide array of motors, compressors, pumps, and other high-power machinery where consistent performance and safety are critical.

At its core, this starter combines a **disconnect switch and motor starter** into a single compact unit, streamlining installation and reducing panel space requirements. The **magnetic contactor** within the assembly provides fast, reliable motor starting and stopping, while the **integrated overload relay** offers thermal protection against overcurrent conditions, preventing motor damage from sustained overloads or short circuits. Siemens advanced **phase failure protection** ensures the motor remains protected from single-phasing, a common issue that can lead to premature failure and costly downtime. The **auxiliary contacts** (typically two sets of normally open and normally closed contacts) enable flexible control signaling for interlocking, alarming, or additional automation functions, enhancing system integration.

The **NEMA 12 enclosure** provides basic protection against falling dirt and dripping non-corrosive liquids, making it ideal for indoor or lightly exposed outdoor applications where environmental resilience is necessary. The **NEMA 4-rated cover** (when installed) further elevates protection against splashing water, hosing, and corrosion, ensuring longevity in harsh industrial settings. The starter s **compact yet sturdy construction** features a **front-accessible terminal block**, allowing for easy wiring and maintenance without disrupting the system. Siemens **modular design** also accommodates future upgrades or modifications, ensuring adaptability as operational requirements evolve.

For enhanced safety and operational efficiency, the **18HSK92NF51** includes a **manual reset overload relay**, allowing for quick troubleshooting and restarting after minor faults. The **magnetic contactor s silver-plated contacts** provide superior conductivity and longevity, reducing arcing and wear over time. Additionally, the unit s **low-profile design** optimizes space utilization in control panels, making it an ideal choice for applications where panel density is a concern. Whether deployed in manufacturing plants, HVAC systems, water treatment facilities, or material handling equipment, this Siemens combination starter delivers **unmatched reliability, efficiency, and protection**, ensuring seamless motor control while minimizing maintenance demands.

### **Pros and Cons of buying a Siemens 18HSK92NF51 Combination Starter/Disconnect (100A, 3-Phase, 600VAC, NEMA 12/4)**

#### **Pros**

1. **Reliability and Brand Reputation** Siemens is a well-established manufacturer known for high-quality electrical components, offering durable and dependable performance in industrial and commercial applications.

2. **Combination Functionality** This unit serves as both a disconnect switch and a motor starter, eliminating the need for separate components. This simplifies wiring, installation, and space requirements.

3. **NEMA 12/4 Enclosure Rating** The NEMA 12 enclosure provides basic protection against dust, dirt, and dripping water, while the NEMA 4 rating (when applicable) offers additional protection against splashing water and hose-directed streams. This makes it suitable for indoor and outdoor environments with moderate exposure.

4. **100A Rating for Heavy-Duty Applications** The 100-ampere rating allows it to handle substantial motor loads, making it suitable for industrial machinery, pumps, compressors, and other high-power equipment.

5. **Three-Phase Compatibility** Designed for 3-phase systems, it ensures proper operation in facilities where three-phase power is standard.

6. **600VAC Voltage Rating** Supports standard industrial voltage levels, ensuring compatibility with most commercial and industrial electrical systems.

7. **NEMA Standardization** The NEMA 12/4 designation ensures compatibility with other NEMA-rated equipment, making integration and maintenance easier.

8. **Potential Long-Term Cost Savings** A high-quality starter can reduce downtime due to failures, lowering maintenance costs over time.

9. **Compatibility with Siemens Ecosystem** If your facility already uses Siemens components, this starter will integrate seamlessly with existing systems, reducing compatibility issues.

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#### **Cons**

1. **Higher Upfront Cost** Compared to generic or lower-brand alternatives, Siemens products typically come at a premium price, which may be a barrier for budget-conscious buyers.

2. **Potential Overkill for Light-Duty Use** If the application requires significantly less than 100 amps, a lower-rated starter may suffice, making this unit unnecessarily expensive.

3. **Installation Complexity** Combination starters require careful wiring and setup. Improper installation can lead to safety hazards or reduced performance, which may necessitate professional electrical work.

4. **Space Requirements** While it combines two functions, the NEMA 12/4 enclosure is still larger than some compact alternatives, which may be a constraint in tight spaces.

5. **Maintenance Considerations** Like all electrical components, this starter will require periodic inspections, testing, and potential replacements of contacts or other wear-and-tear parts.

6. **Limited Customization** Siemens offers a range of standard models, but customization options (e.g., specific control schemes, additional protections) may require additional accessories or modifications.

7. **Potential for Overrating** If the motor or load is significantly smaller than 100 amps, the starter may be overrated, leading to inefficiencies or unnecessary wear.

8. **Availability and Lead Times** Depending on the region, Siemens parts may have longer lead times compared to more widely stocked brands, which could delay projects.

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### **Conclusion**

The **Siemens 18HSK92NF51 Combination Starter/Disconnect** is a robust, high-quality choice for industrial or commercial applications requiring a reliable 100-ampere, three-phase disconnect and starter. Its combination functionality, brand reputation, and NEMA-rated enclosure make it a strong option for environments where durability and ease of integration are priorities. However, the higher cost and potential overkill for smaller applications may not justify the purchase for every use case.

### **Recommendation**

- **Buy this unit if:**

- You need a dependable, long-lasting starter for heavy-duty or critical applications.

- Your facility already uses Siemens components, ensuring compatibility.

- You require a NEMA 12/4-rated enclosure for moderate environmental protection.

- The 100-ampere rating aligns with your motor or load requirements.

- **Consider alternatives if:**

- Your budget is tight, and you can find a similarly rated generic or mid-tier brand starter at a lower cost.

- The application requires significantly less than 100 amps, making a lower-rated starter more cost-effective.

- Space is extremely limited, and a more compact starter would be preferable.

- You need additional features (e.g., overload protection, variable speed control) that this standard model does not provide.

For most industrial settings where reliability and brand trust are paramount, this Siemens starter is a solid investment. However, always verify the exact amperage and voltage requirements of your application to ensure it is the optimal choice.

Details:

Cabinet is 24 inches long plus 1.25 each top and bottom for wall mount brackets. 100 amp, 3 phase, 600VAC, NEMA 12/4. Depth of cabinet is 8 3/4 and width 20. Works as it should.

Siemens Combination Starter/Disconnect catalog # 18HSK92NF51. Removed from service and replaced with VFD.

part #: 18hsk92nf51 price

  • $600.00

specifications automationjack:

  • brand: Siemens
  • mpn: 18hsk92nf51
  • part type: Starter
  • custom bundle: No
  • country of manufacture: United States
  • modified item: Yes

seller automationjack:

  • # reviews: 929
  • rating: 100.0%
  • city: Rebersburg, Pennsylvania

returns automationjack:

  • paid by: Buyer
  • time: 30 Days
  • method: Money back
  • policy: Returns Accepted

shipping automationjack:

  • transit: 5-10 Days
  • type: Calculated
  • service: FedEx Ground Economy, UPS Ground Saver
  • class: Economy
  • carrier: FedEx, UPS
  • cost: $51.00

offer automationjack:

  • options: Ship-to-home
  • best offers: True
  • availability: In Stock
  • started: May 24, 2026
  • sold: 0
  • quantity: 1

payments automationjack:

  • wallet: Paypal
  • credit card: Mastercard
  • other

general automationjack:

  • Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
  • condition: Used
part type: starter, custom bundle: no, country of manufacture: united states, modified item: yes,
category: business & industrial > industrial automation motion controls > automation equipment, sku: 15761872874692602,
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1 offer $600.00 USD
  • Used. Offer #1 priced at $600.00 + $51.00 shipping estimate = $651.00* total. Depth of cabinet is 8 3/4" and width is 20". 100 amp, 3 phase, 600VAC, NEMA 12/4.+$51.00 shipping

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