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HomeProductsSensors, TransducersTemperature Sensors - Thermostats - Mechanical67L120P
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67L120P - Sensata-Airpax

Manufacturer Part Number
67L120P
Manufacturer
Airpax / Sensata Technologies
Allelco Part Number
98D-67L120P
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
36,880 pcs available, New & Original
Parts Description
THERMOSTAT 120DEG C NC TO220-2
Package
TO-220-2
Data sheet
67L120P.pdf
RoHs Status
RoHS Compliant
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Our certification
In stock: 36880
  • Unit Price: $14.83
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $14.83 $14.83
200+ $5.92 $1,184.00
500+ $5.72 $2,860.00
1000+ $5.62 $5,620.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

67L120P Tech Specifications
Sensata-Airpax - 67L120P technical specifications, attributes, parameters and parts with similar specifications to Sensata-Airpax - 67L120P

Product Attribute Attribute Value
Manufacturer Airpax / Sensata Technologies
Tolerance ±9°F (±5°C)
Termination Style PC Pins
Switching Temperature 248°F (120°C)
Switching Cycles 20K
Series 6700
Reset Temperature 185°F (85°C)
Product Attribute Attribute Value
Package / Case TO-220-2
Package Tube
Mounting Type Through Hole
Current Rating - DC 0.5A (48V)
Current Rating - AC -
Circuit SPST-NC
Base Product Number 67L120

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8536.50.9065

Frequently Asked Questions(FAQ)

What are the key performance differences between the 67L120P thermostat and similar temperature-sensing components with comparable switching thresholds, particularly in high-current industrial applications?
The 67L120P provides a switching temperature of 120°C (248°F) with a reset point at 85°C (185°F), offering a hysteresis of approximately 35°C. This hysteresis helps prevent rapid cycling in environments with minor temperature fluctuations. Compared to solid-state thermistors or digital sensors, it delivers mechanical reliability under sustained current loads—up to 0.5A DC at 48V—without signal drift. However, unlike programmable IC-based solutions, it lacks dynamic calibration and responds only to thermal expansion of its bimetallic element, making it less suitable for precision control but more robust in harsh, high-vibration settings common in motor drives or power conversion systems.
How does the 67L120P compare thermally and electrically to other members of the 6700 series, such as the 67L85P or 67L150P, when used in overheat protection circuits for DC motors?
While all devices in the 6700 series share the same TO-220-2 package and SPST-NC configuration, the 67L120P activates at a higher threshold than the 67L85P (85°C) but lower than the 67L150P (150°C). In a 48V DC motor application drawing 400mA, the 67L120P would disconnect the load once winding temperatures exceed 120°C, whereas the 67L85P would trip much earlier—potentially during normal warm-up phases—leading to nuisance tripping. Conversely, the 67L150P might not trigger until critical insulation limits are approached, increasing fire risk. Thus, the 67L120P strikes a middle ground suitable for moderate-duty motors where precise thermal staging is needed without sacrificing response time.
Can the 67L120P be used interchangeably with surface-mount equivalents from competing manufacturers for retrofitting legacy through-hole designs?
Interchangeability depends on thermal management and mounting compatibility. The 67L120P uses PC pins compatible with standard TO-220 footprints, allowing drop-in replacement in existing boards. However, surface-mount versions often feature lower thermal mass and different contact geometry, which can alter heat transfer dynamics and affect actual operating temperature by several degrees. Additionally, the 67L120P’s ±5°C tolerance means its behavior may vary outside the range expected by adjacent components if replaced with a tighter-tolerance alternative. Therefore, while physically feasible, electrical performance should be verified through thermal simulation or prototype testing before full-scale redesign.
What environmental and regulatory considerations apply to integrating the 67L120P into end products intended for global markets?
The 67L120P is RoHS compliant and carries an MSL rating of 1, indicating unlimited shelf life and no special handling requirements during assembly. Its ECCN classification is EAR99, meaning export controls are minimal under U.S. regulations. HTSUS code 8536.50.9065 confirms its status as a temperature-actuated switch. These attributes simplify compliance documentation for CE, FCC, and international trade, especially in consumer electronics or white goods where halogen-free materials and lead-free soldering processes are standard. No additional shielding or isolation is mandated due to its low-power operation and non-switching nature beyond the relay function.
How reliable is the 67L120P over long-term operation, and what design precautions mitigate failure modes in mission-critical systems?
With a rated switching cycle life of 20,000 operations, the 67L120P is engineered for intermittent use rather than continuous cycling. In steady-state overheat protection—where it trips once and remains open until manually reset or power-cycled—its lifespan far exceeds typical service intervals. However, repeated short-duration overloads causing frequent actuation accelerate contact erosion. To enhance reliability, designers should avoid routing high-inductance loads across the switch terminals and ensure adequate airflow or heatsinking near the sensor body to reduce thermal stress. Derating below its 0.5A/48V maximum also prolongs contact integrity.
What are the implications of the ±5°C tolerance in the 67L120P for safety-certified equipment requiring strict thermal cutoff thresholds?
The ±5°C variation implies that actual switching could occur anywhere from 115°C to 125°C, introducing uncertainty into fault detection margins. For safety standards like UL 508 or IEC 60730, this tolerance necessitates margin planning: if certification requires disconnection below 125°C, the nominal setpoint must be derated to 120°C to guarantee worst-case compliance. This may involve adjusting placement sensitivity or combining multiple sensors. Unlike calibrated digital thermostats, the 67L120P cannot be field-adjusted, so initial selection must account for this statistical spread through conservative system design.
Is the reset temperature of 85°C in the 67L120P sufficient for preventing thermal runaway in compact power supplies using aluminum electrolytic capacitors rated for 105°C?
Yes, the 85°C reset point provides a safe cooldown window before capacitor life degradation accelerates near their upper limit. Since the 67L120P recloses only after dropping below 85°C, it allows natural cooling without immediate restart, reducing cumulative stress. In contrast, a thermostat with a higher reset point (e.g., 100°C) might cause premature reconnection during transient peaks, shortening capacitor endurance. Given that many aluminum caps exhibit 2,000–5,000 hour lifespans at 105°C, maintaining average case temperatures well below that threshold is crucial—and the 67L120P’s hysteresis supports this by avoiding chatter during mild overheating events.
How does the TO-220-2 packaging of the 67L120P influence thermal coupling and response speed compared to smaller form factors like TO-92?
The TO-220-2 package features a larger exposed metal base and PC pins that facilitate direct mounting onto heatsinks or copper planes, improving thermal conductivity from ambient to the bimetallic element. This results in faster response times—typically within seconds of reaching threshold—compared to encapsulated TO-92 types where internal leads act as thermal insulators. However, the increased size may complicate layout in space-constrained designs. For applications where response latency must be minimized, such as fan control loops, the 67L120P’s architecture ensures accurate detection without external amplification, though PCB trace resistance to the pin must be kept low to avoid false triggering from localized heating.

Parts with Similar Specifications

The three parts on the right have similar specifications to Sensata-Airpax 67L120P

Product Attribute 67L120 67L120-0144 67L120-0378 67L120-0287
Part Number 67L120 67L120-0144 67L120-0378 67L120-0287
Manufacturer Sensata-Airpax Sensata-Airpax Sensata-Airpax Sensata-Airpax
Tolerance - - - -
Current Rating - DC - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Reset Temperature - - - -
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Current Rating - AC - - - -
Switching Temperature - - - -
Circuit - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Switching Cycles - - - -
Termination Style - - - -

67L120P Datasheet PDF

Download 67L120P pdf datasheets and Sensata-Airpax documentation for 67L120P - Sensata-Airpax.

Datasheets
Cylindrical Battery Holders.pdf

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
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  • Packaging
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QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
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  • ISO 14001: 2015
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  • IPC
  • ESD
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67L120P Image

67L120P

Sensata-Airpax
98D-67L120P

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