Littelfuse Smart Thermostat Solutions

1. Chip fuse (24V_AC): 437, 468
    PPTC: 290L, SMDC
    TVS diode: SACB, SMAJ, SMF3.3
    Latching relay driver: CPC1600
2. TVS diode, MLV: MLA, SMF
    PPTC: femtoSMD, nanoSMD, picoSMD
    Strap PPTC: MXP, SL
3. TVS array: SESD, SPXX
    PPTC: 0402L, femtoSMD
4. TVS array: SACB, SMAJ, SMBJ
5. TVS array: PESD, SP3213-01UTG
6. TVS array: SP3213-01UTG
    Polymer ESD: PESD
7. TVS array: SM712
8. TVS diode, MLV: MLA, PLED, SMF
9. NTC: SMA Series, RB, DO-35

Applicable Standard for Smart Thermostats

• The basic standard used to investigate products in this category is UL 873, "Temperature-Indicating and -Regulating Equipment," or ANSI/UL 60730-1, "Automatic Electrical Controls - Part 1: General Requirements"
• ANSI/UL 60730-2-9, "Automatic Electrical Controls - Part 2-9: Particular Requirements for Temperature Sensing Controls"
• UL60730-2-1A, "Automatic Electrical Controls for Household and Similar Use; Part 2: Particular Requirements for Energy Regulator"
• Surge protective devices, including MOVs shall comply with the requirements in the Standard for Surge Protection Devices, UL 1449
• (NTC) Thermistor shall comply with Standard for Thermistor-Type Devices, UL 1434
• Fuseholders shall comply with Standards for Fuseholders – UL 4248-9
• IEC 60335-2-30 Ed. 5.1 b:2016. Household and similar electric appliances - Safety – Part 2-30: Particular requirements for room heaters
• UL 1642: Lithium Batteries
• UL 2054: Household and Commercial batteries
• IEC 62281: Safety of Primary and Secondary Lithium Cells and Batteries during transport