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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) - TVS Diodes > SP1021-01WTG
Littelfuse Inc.
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SP1021-01WTG

In Stock 65300 pcs Reference Price(In US Dollars)
1+
$0.0803
200+
$0.0311
500+
$0.03
1000+
$0.0295
Manufacturer Part Number:
SP1021-01WTG
Manufacturer / Brand
Littelfuse Inc.
Part of Description:
TVS DIODE 6VWM 11.2VC 2FLIPCHIP
Datasheets:
SP1021-01WTG.pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 65300 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number SP1021-01WTG
Manufacturer / Brand Littelfuse Inc.
Stock Quantity 65300 pcs Stock
Category Circuit Protection > Transient Voltage Suppressors (TVS) - TVS Diodes
Description TVS DIODE 6VWM 11.2VC 2FLIPCHIP
Lead Free Status / RoHS Status: ROHS3 Compliant
Voltage - Reverse Standoff (Typ) 6V (Max)
Voltage - Clamping (Max) @ Ipp 11.2V
Voltage - Breakdown (Min) -
Type Zener
Supplier Device Package 2-FlipChip
Series SP1021, SPA®
Power Line Protection No
Power - Peak Pulse -
Package / Case 01005 (0402 Metric)
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Current - Peak Pulse (10/1000µs) 2A (8/20µs)
Capacitance @ Frequency -
Bidirectional Channels 1
Applications General Purpose

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can SP1021-01WTG be used to protect a 3.3 V GPIO, sensor input, or MCU I/O line on a compact PCB?
Yes. SP1021-01WTG is generally a good fit for 3.3 V logic and low-voltage control lines when the normal signal swing stays comfortably below its 6 V reverse-standoff level. In practice, it is usually placed at the board edge or near the connector to shunt transients before they travel across the trace. For longer traces or noisy environments, combine SP1021-01WTG with good return-path layout and, if needed, a small series resistor to reduce surge current and ringing.
Is SP1021-01WTG suitable for protecting a 5 V interface, or should I choose a higher-voltage TVS instead?
SP1021-01WTG can be used on some 5 V interfaces, but only when the line’s steady-state voltage, tolerance, and overshoot remain below its 6 V standoff level. If the line can sit near 5 V with significant tolerance, hot-plug transients, or inductive overshoot, a TVS with more voltage margin may reduce leakage risk and unintended clamping during normal operation. For design-in, SP1021-01WTG is usually chosen after checking the worst-case high level, not just the nominal 5 V value.
Where should SP1021-01WTG be placed on the PCB for ESD or cable-entry protection?
SP1021-01WTG should be placed as close as practical to the connector, exposed pad, or entry point that first sees the transient. The goal is to keep the trace from the connector to the TVS short and low-inductance so the pulse is diverted before it couples into the rest of the circuit. A short path to the ground return is also needed; otherwise, the clamping voltage at the protected IC can be higher than expected even if SP1021-01WTG is present.
Can SP1021-01WTG be used for power-rail protection or load-dump-style transients?
SP1021-01WTG is not a power-line protection device. Its 2 A peak-pulse rating and small 01005 footprint are aimed at signal-line transient suppression, not sustained surge or high-energy rail events. For a supply rail, battery input, or automotive-style energy pulse, a different protection network is usually used, often with a higher-power TVS, fuse, or current-limiting element. SP1021-01WTG is better suited to low-energy, fast transients on signal nets.
How well does SP1021-01WTG work for IEC ESD events on exposed user interfaces?
SP1021-01WTG can help with IEC 61000-4-2-type ESD on buttons, ports, and short external traces, but the board layout determines the final result. The TVS must have a low-impedance path to the discharge return, and the protected IC should not sit directly in the surge current loop. For ports with frequent user contact, SP1021-01WTG is often paired with chassis grounding, spacing, and sometimes a series resistor or ferrite to reduce the residual stress seen by the IC.
What are the best drop-in or near-drop-in replacement options for SP1021-01WTG from Littelfuse?
The closest migration candidates to SP1021-01WTG include SP1043-01WTG, SP1053-01UTG, and SP1014-01WTG, but they should be treated as engineering alternatives rather than automatic drop-ins. Even within the same Littelfuse family, the working voltage, clamp behavior, and package variant can differ. Before changing to one of these parts, verify the standoff voltage, peak-pulse handling, footprint, and whether the replacement still matches your normal signal level and board assembly process.
Can SP1021-01WTG replace a 0402 TVS from another brand on an existing design?
SP1021-01WTG can replace another 0402-class TVS if the footprint, standoff voltage, clamp level, and surge rating line up with the original design target. The package size alone is not enough for a safe substitution, because two parts with the same footprint can behave differently under fast transients or in leakage-sensitive circuits. When evaluating SP1021-01WTG as a cross-reference, check the normal operating voltage, expected surge current, and whether the original circuit depends on very low capacitance or specific clamping behavior.
Is SP1021-01WTG a good choice for industrial equipment that runs from -40°C to 125°C?
SP1021-01WTG is compatible with industrial temperature ranges at the junction level, and its RoHS3 and MSL 1 status simplify storage and assembly. For long-term industrial use, the main checks are repetitive transient exposure, solder-joint robustness, and contamination control around such a small 01005 part. If the line sees frequent bursts, relay kicks, or cable disconnections, SP1021-01WTG should be evaluated under the actual waveform repetition rate rather than only with a single-pulse test.
Are there assembly or yield risks when using SP1021-01WTG in 01005 package form?
Yes, the SP1021-01WTG package is very small, so paste volume, placement accuracy, and stencil design affect yield. In 01005 assembly, excessive solder can increase tombstoning or bridging risk, while too little solder can reduce mechanical retention and thermal consistency. For production, SP1021-01WTG usually benefits from tight pick-and-place control, well-tuned reflow profiling, and inspection rules that account for the tiny 2-FlipChip style footprint.
Is SP1021-01WTG appropriate for high-speed data lines such as USB, MIPI, or fast differential interfaces?
SP1021-01WTG may be usable on some fast lines only after checking the interface’s signal integrity budget, because package parasitics and TVS capacitance can affect edge rate and insertion loss. Since the capacitance for SP1021-01WTG is not specified in the summary data, it is safer to validate it on the actual interface rather than assume it is low enough for every high-speed protocol. For very fast differential links, designers often compare SP1021-01WTG against a lower-capacitance TVS family and verify eye diagram or TDR results before finalizing the layout.

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SP1021-01WTG

SP1021-01WTG

Littelfuse Inc.

TVS DIODE 6VWM 11.2VC 2FLIPCHIP

In Stock: 65300

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