Littelfuse S4010D Sxx10x Serie...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$320.71
Littelfuse S4010D Sxx10x Series SCR Thyristor, 400V 10A

Littelfuse S4010D Sxx10x Series SCR Thyristor, 400V 10A

(No reviews yet) Write a Review

Model: S4010D

In Stock (leaves warehouse same day if ordered before 3pm ET)

$320.71
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Littelfuse S4010D Sxx10x Series SCR Thyristor, 400V 10A

The Littelfuse S4010D is part of the Sxx10xSx/Sxx10x Series of silicon controlled rectifiers (SCRs), engineered for uni-directional switch applications such as phase control, heating, motor speed controls, converters/rectifiers, and capacitive discharge ignitions. This device is rated for a 400V repetitive peak off-state voltage (VDRM) and a 10A on-state current (Itrms), and is housed in a compact TO-252 (D-Pak) package. Built with glass-passivated junctions and RoHS compliant, halogen-free construction, this SCR delivers reliable switching performance for demanding industrial and commercial electrical control circuits.

Key Features

  • Package Size: TO-252 (D-Pak) package for compact, surface-mount SCR designs.
  • Voltage Rating: 400V repetitive peak off-state voltage (VDRM), with series voltage capability up to 1000V.
  • Current Handling: 10A on-state current (Itrms) with a non-repetitive surge current (ITSM) rating up to 100A at 60Hz half cycle.
  • Low Gate Trigger Current: Gate current trigger level of 0.2 to 15 mA at approximately 1.5V (VGTMAX), with sensitive-gate versions of this series triggering below 500µA for use with sense coils, proximity switches, and microprocessors.
  • Glass-Passivated Junctions: Supports long-term reliability and consistent switching performance.
  • Halogen Free & RoHS Compliant: Meets environmental compliance requirements for modern electrical designs.
  • Switching Characteristics: On-state voltage (VTM) of 1.6V, gate trigger time (TGT) of 2µs, and turn-off time (Tq) of 35µs.

Certifications & Compliance

  • RoHS Compliant
  • Halogen Free

Technical Specifications

  • VTM (V): 1.6
  • TGT (µs): 2
  • di/dt @ 110°C (A/µs): 100
  • On-State Current (Itrms) (A): 10
  • IDRM@VDRM 125°C (mA): 0.5
  • Non-Repetitive Surge Current (ITSM 60Hz) (A): 100
  • Repetitive Peak Off-State Voltage (VDRM) (V): 400
  • Tq(µs): 35
  • dv/dt @ 125°C (V/µs): 250
  • Max Gate Trigger Current (IGTMAX) (mA): 15
  • Gate Trigger Voltage (VGTMAX) (V): 1.5

Typical Applications

  • Phase Control Circuits
  • Heating Control Systems
  • Motor Speed Controls
  • Converters and Rectifiers
  • Capacitive Discharge Ignition Systems
  • Sensitive-Gate Triggering via Sense Coils, Proximity Switches, and Microprocessors

Why Littelfuse?

Littelfuse engineers the Sxx10x Series SCR thyristors with glass-passivated junctions and RoHS compliant, halogen-free construction for dependable, code-compliant performance in professional electrical control applications. With a series voltage capability up to 1000V and surge current handling to 100A at 60Hz half cycle, the S4010D is built to hold up in demanding uni-directional switching environments where consistent, low-current triggering matters.

Product Specs

Product Type:
Thyristor
Series:
Sxx10x
Voltage Rating:
400V
Amperage Rating:
10A
Standards:
RoHS Compliant
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Parts & Accessories

Littelfuse S4010D – Frequently Asked Questions

1) Will a Littelfuse S4010D SCR handle a 240V AC phase control circuit?
Yes. The S4010D is rated 400V repetitive peak off-state voltage (VDRM), which covers the roughly 340V peak of a 240V AC line with margin, and it carries 10A on-state RMS current (Itrms). Phase control is one of the uni-directional switching applications this SCR is built for, along with heating control, motor speed control, and converters/rectifiers. Keep in mind an SCR conducts in one direction only, so for full-wave AC control you need two in inverse parallel or a triac.
2) Can I trigger the S4010D directly from a microcontroller output pin?
Not reliably. The standard S4010D needs a gate trigger current in the 0.2 to 15 mA range at about 1.5V gate trigger voltage, and the 15 mA worst case is more than most logic pins will source. Littelfuse makes sensitive-gate versions in the same Sxx10x family that trigger below 500 microamps, and those are the ones specified for sense coils, proximity switches, and microprocessor drive. Either use a sensitive-gate variant or add a driver stage.
3) Will a 10A SCR survive the inrush from a capacitive discharge ignition or a lamp load?
The S4010D is rated for 100A non-repetitive surge current (ITSM) on a 60Hz half cycle, well above its 10A continuous on-state rating, and its di/dt capability is 100 A/microsecond at 110C. Capacitive discharge ignition is one of the applications called out for this series. Size the inrush against that 100A single-cycle figure, not against the 10A number.
4) How much heat will the S4010D dissipate when it is conducting?
On-state voltage (VTM) is 1.6V. At the full 10A RMS rating that works out to roughly 16W of conduction loss at peak conduction, so a D-Pak at that current needs real copper area or a heat spreader under the tab. For phase-controlled loads the average dissipation drops with conduction angle.
5) Is the S4010D fast enough for a high frequency inverter or converter?
Turn-off time (Tq) is 35 microseconds and gate trigger time (TGT) is 2 microseconds. That suits line-frequency and moderate-speed converter and rectifier work, phase control, and heating. It is not a fast-recovery device for high kilohertz switching, where the 35 microsecond commutation window becomes the limit.
6) Will electrical noise or a fast voltage transient cause false turn-on?
Static dv/dt capability is 250 V/microsecond at 125C, and the junctions are glass passivated for stable blocking behaviour. Off-state leakage (IDRM at VDRM) is 0.5 mA at 125C. In noisy motor-control or heating cabinets, a snubber across the device keeps applied dv/dt under that 250 V/microsecond figure.
7) I need a higher blocking voltage than 400V. Does the Sxx10x series go further?
Yes. The S4010D itself blocks 400V VDRM, but the Sxx10x family extends up to 1000V series voltage capability at the same 10A on-state current class, so if your rail or line transient demands more standoff, move up within the series rather than derating this part.
8) Does the Littelfuse S4010D meet RoHS and halogen-free requirements for our builds?
Yes, it is RoHS compliant and halogen free, which is what most institutional and OEM electrical specs ask for on board-level components.
9) What is the exact part number to order for the 400V 10A D-Pak SCR?
Order Littelfuse S4010D. That is the single model in this configuration: 400V VDRM, 10A Itrms, TO-252 (D-Pak).
How fast can I get the Littelfuse S4010D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Littelfuse S4010D come with a warranty?
Absolutely. The Littelfuse S4010D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Littelfuse S4010D?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Littelfuse S4010D from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!