Logo
Contact Us
Cookies Policy
Terms of Use
Privacy Policy
phone
Vivi (Sales)
phone
Lucy (Sales)
phone
Ban (Sales)
phone
+86 755-2845-3125
RFQ List
  • open navigation menu
    • Logo
    • RFQ List
      • Manufacturers
      • Hot Products
      • RFQ
      • Blog
      • Tools
      • Sourcing Solutions
      • PCB/SMT
      • About Us
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    CONTACT US
    Customer Support:
    +86 755-2845-3125
    Room 2709B, 5A Office Building, Longguang Jiuzuan, Hongshan, Longhua District, Shenzhen, China
    [email protected]
    Company
    • Blog
    • About Us
    • Contact Us
    Resources
    • Categories
    • Manufacturers
    • Tools
    • RFQ
    Quick link
    • Privacy Policy
    • Terms of Use
    • Cookies Policy
    • Refund & Return Policy
    • Shipping & Delivery Policy
    Payment
    • Payment method
    • Payment method
    • Payment method
    • Payment method
    Logistics
    • Logistics partner
    • Logistics partner
    • Logistics partner
    • Logistics partner

    © 2026 Copyright. All Rights Reserved. Made by ICAllIn

    Part number
    Part number
    1. Home/
    2. All Categories/
    3. Electromechanical/
    4. Relays, Contactors & Solenoids/
    5. KSPSA21FT Littelfuse

    KSPSA21FT [Littelfuse]

    KSPSA21FT
    KSPSA21FT

    Part No:

    KSPSA21FT

    Category:

    Relays, Contactors & Solenoids

    Manufacturer:

    Littelfuse

    Description:

    The KSPS Series is a factory programmed module available in any 1 of 14 standard functions. The KSPS Series offers a single, fixed, externally or onboard adjustable time delay.

    Datasheet:

    Stock Status:

    Available for RFQ

    Pricing:

    Request Volume Pricing

    Quote Response:

    Within 24 Hours

    Shipping:

    In-stock parts ship in 1–2 business days

    Specification

    Type
    Parameter
    Insulation Resistance
    ≥ 100MΩ
    Operating Humidity
    95% relative, non-condensing
    Operating Temperature
    -40°C ~ 60°C
    Weight
    2.4 oz (68 g)
    Storage Temperature
    -40°C ~ 85°C
    Ac Line Frequency
    50/60Hz
    Dc Ripple
    ≤ 10%
    Depth
    30.7 mm
    Dielectric Breakdown
    ≥ 2000V RMS
    Height
    50.8 mm
    Initiate Time
    ≤ 20ms
    Input Voltage Ac
    24VAC ~ 240VAC
    Input Voltage Dc
    12VDC ~ 120VDC
    Input Voltage Tolerance
    ≤ ±15%
    Inrush Duration
    16ms
    Leakage Current Ac
    5mA @ 240VAC
    Leakage Current Dc
    1mA
    Mounting Type
    Surface mount with one #10 screw
    Operations Per Minute
    ≤ 1500
    Output Current Inrush
    10A
    Output Current Steady
    1A
    Output Type
    Solid-state
    Polarity Protection
    Reverse polarity protected (DC units)
    Power Consumption Ac
    ≤ 2VA
    Power Consumption Dc
    ≤ 1W
    Repeat Accuracy
    ±0.5% or 20ms, whichever is greater
    Reset Time
    ≤ 150ms
    Terminations
    0.25 in. (6.35 mm) male quick connects
    Time Delay Range Max
    1000h
    Time Delay Range Min
    0.1s
    Time Delay Type
    Microcontroller circuitry
    Time Delay Variation
    ≤ ±2%
    Tolerance
    ≤ ±2%
    Voltage Drop Ac
    2.5V @ 1A
    Voltage Drop Dc
    1V @ 1A
    Width
    50.8 mm

    Products Detail

    The KSPS Series is a factory programmed time delay relay module available in 14 standard functions. It features a solid-state output rated at 1A steady and 10A inrush, providing 100 million operations typical. The microcontroller-based timing circuit ensures excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. It offers a cost-effective solution for OEM applications requiring small size and solid-state reliability. The series includes adjustable time delays from 0.1s to 1000h across multiple ranges.

    Key Features

    • Microcontroller based
    • Compact design
    • 1A steady, 10A inrush solid-state output
    • Totally solid state and encapsulated
    • Factory programmed with 14 standard functions
    • Adjustable time delay (external/onboard)
    • 100 million operations typical
    • Repeat accuracy ±0.5%
    • Protection against shock, vibration, and humidity
    • DIN rail mountable

    Application scenarios

    • OEM applications
    • industrial control
    • time delay control

    Documents

    Datasheets:

    KSPS Series Datasheet
    Product FAQ

    1. Is KSPSA21FT available for RFQ?

    Yes. KSPSA21FT by Littelfuse is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

    2. Why is there no fixed price for KSPSA21FT?

    Pricing for KSPSA21FT can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

    3. What are the key specifications of KSPSA21FT?

    KSPSA21FT is a Littelfuse Relays, Contactors & Solenoids with Input Voltage Tolerance: ≤ ±15% and Insulation Resistance: ≥ 100MΩ. Review the product details or submit an RFQ if you need confirmation before purchase.

    4. How fast can I get a quote for KSPSA21FT?

    Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

    5. How soon can KSPSA21FT be shipped?

    If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

    6. Can you suggest alternatives to KSPSA21FT?

    Yes. If KSPSA21FT is unavailable, obsolete, or does not meet your required lead time, we can help check similar Littelfuse Relays, Contactors & Solenoids parts or compatible alternatives.

    RFQ

    Part Number:

    KSPSA21FT

    Manufacturer:

    Littelfuse

    Looking for Pricing? Contact us for volume pricing.

    Shipping & Warranty

    Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)

    Unishop Global Export: 1-7 days, $40.00

    Guaranteed Delivery: Door-to-door in 30 days

    Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.

    Feature

    • 30-Day Guarantee
      30-Day Guarantee
    • Fasted Delivery
      Fasted Delivery
    • Hassle-Free Returns
      Hassle-Free Returns
    • Secure payment method
      Secure payment method

    IMPORTANT NOTICE

    Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

    Featured Product

    BEST SELL
    H5CG46MEBDX015N

    H5CG46MEBDX015N

    SK HYNIX

    BEST SELL
    MT41K512M16VRN-107 IT:P

    MT41K512M16VRN-107 IT:P

    Micron

    BEST SELL
    MT48H32M16LFB4-6 IT:C

    MT48H32M16LFB4-6 IT:C

    Micron

    BEST SELL
    TMS320F28379DZWTT

    TMS320F28379DZWTT

    Texas Instruments

    BEST SELL
    ADS1248IPWR

    ADS1248IPWR

    Texas Instruments

    BEST SELL
    MT25QU256ABA1EW7-0SIT

    MT25QU256ABA1EW7-0SIT

    Micron

    BEST SELL
    PI7C9X2G1616PRAHSBE

    PI7C9X2G1616PRAHSBE

    DIODES

    BEST SELL
    H9TQ64A8GTDCUR-KUM

    H9TQ64A8GTDCUR-KUM

    SK HYNIX

    BEST SELL
    MT47H128M16RT-25E IT:C

    MT47H128M16RT-25E IT:C

    Micron

    BEST SELL
    K4AAG085WA-BIWE

    K4AAG085WA-BIWE

    SAMSUNG

    Related Information
    • Part Number
      Manufacturer
      Stock Status
      Pricing
      RoHS/Datasheet
    • FS162-30
      Littelfuse
      Available for RFQ
      Request Volume Pricing
      -
    • CPC1563G
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • LAA125P
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • 777-LR-HRG-P2
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • FS127
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • CPC1335P
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • LAA127S
      Littelfuse
      Available for RFQ
      Request Volume Pricing
    • CON-1/240/40
      Littelfuse
      Available for RFQ
      Request Volume Pricing
      -
    • DCNEV150-MN
      Littelfuse
      Available for RFQ
      Request Volume Pricing
      -
    • KSD2220
      Littelfuse
      Available for RFQ
      Request Volume Pricing
      -

    10827900

    10827900

    Littelfuse

    CPC1986J

    CPC1986J

    Littelfuse

    24106

    24106

    Littelfuse

    DCNLB200NB60

    DCNLB200NB60

    Littelfuse

    ISS-102ACI-MC

    ISS-102ACI-MC

    Littelfuse

    HRDR121A4R

    HRDR121A4R

    Littelfuse

    LAA126STR

    LAA126STR

    Littelfuse

    DCNEV250-G

    DCNEV250-G

    Littelfuse

    EL731-13-00

    EL731-13-00

    Littelfuse

    90290

    90290

    Littelfuse

    Switches(351261)Printers(0)Motors & Drives(12643)Audio Devices(11053)Knobs & Dials(2711)Circuit Breakers(0)Hardware(25618)Industrial Automation(23025)Valves(1109)Fans & Blowers(30969)Heat Exchangers(533)Liquid Cooling & Heat Pipes(161)Liquid Cooling Connectors & Accessories(0)Thermal Interface Products(784)

    No recently viewed products