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Klixon Prefixes: 1NT 2ACE 2AM 2BM 2MM 2TC 3AM 3BT 3CR 3HM 3MP 3NT 3P 3SB 3SP 3TC 4AM 4BA 4BT 4CR 4SP 4TM 5BT 5SP 5TC 5TM 6AP 6PS 6TC 7AM 7BT 7HT 8AM 8EA 8HT 8SP 9HT 9TC 10HT 12HT 14HT 15AA 15AM 15HM 15TC 16HM 17AM 20TC 30AA 31AA 32AA 31HM 32HM 33HM 34HM 35HM 37HM 40AA 41AA 42AA 1822 4344 4391 6752 6766 6790 7235 7236 7270 7271 7274 7277 7851 7854 7855 7895 8347 8348 9115 9660 9700K 215** 283** A* ACMP AT B* BE* BJE BR* BY* C* CA CDA CDLA CDLM CDM CE* CG* CLA CLM CM CR* CS* CW* CY* D* DP EXT FDL* KA KX LE* M1 M2 MA10 MAXI ME* MG* MJE MKA MR* MS* MW* MY* PDA PDLA PDLM PDM PS* PS80 RP SB SDL* SJA SKA SLA SL9 SL10 SL11 SOS SP TH |
Klixon **AA series electronic motor protector and PTC thermistors
Texes Instruments protection modules and PTC thermistors H.S. Numbers: 8533.40.80, 9030.33.10 Series Specification Sheets (pdf) · Replacement Modules Specifications (pdf) 
Used with Positive Temperature Coefficient (PTC) sensors the modules protect against locked rotor conditions, running overload and high ambient temperature. The innovative design offers additional functions as well, such as minimum off time delay, low voltage cutout and bearing temperature protection. Also the device is very safe and easy to calibrate for voltage (no jumper is required).
Price: $265.00 each
Parts 32AA100E, 42AA100E and 50A1C1A2 are obsolete with no direct replacement. Consider the 41AA1500E with uses 3 individual PTC thermistors instead of one triple thermistor.
Note: These modules are no longer manufactured by Klixon. We will supply NOS when available and replacement modules when not.
PTC Thermistors
3BA, 4BA, 7BA, 10BA: Series Specification Sheet (pdf)
For above modules and other uses. Klixon no longer makes the 3BA and 4BA flat foil style sensors and we have not been able to find another manufacturer. The below PTC sensors are bead style with nominal resistance 50-100Ω for singles and 150-300Ω for triples.
Price: $14.50 single or $24.50 triple
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