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Semtech Corporation TCLAMP0882S.TCT
- Part No.:
- TCLAMP0882S.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
TCLAMP0882S.TCT.pdf
- Description:
- TVS DIODE 8VWM 9.5VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
TClamp0882S.TCT from Semtech is an 8V-rated low-capacitance transient voltage suppressor (TVS) array designed for secondary ESD and surge protection in G.Fast and DSL line drivers. It delivers 30kV IEC 61000-4-2 contact ESD immunity, 30A 8/20µs lightning surge capability, and 2.5pF max junction capacitance - enabling clean signal integrity on high-speed xDSL interfaces.
For engineers reviewing the TClamp0882S.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include its snap-back clamping behavior (9.5V VC at 30A), bias-enabled capacitance stabilization, SOT-23-6L flow-through layout compatibility, and compliance with ITU-T K.20/K.21/K.44 when paired with GDTs.
Technical Context
The TClamp0882S.TCT integrates steering diodes and a high-power silicon-avalanche TVS in a single SOT-23-6L package, using a biased bridge architecture to minimize dynamic capacitance variation across 1–8V reverse bias. Its snap-back (crow-bar) triggering ensures low clamping voltage during transients while maintaining high impedance under normal operation.
It supports both single-ended (e.g., G.Fast CPE with Pin 2 grounded) and dual-voltage (e.g., VDSL Class-H with Pin 2 connected to negative bias) configurations. Pin 5 accepts external positive bias to pre-charge the TVS junction, eliminating initial signal distortion caused by uncharged capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 8 V - Maximum continuous DC operating voltage before leakage exceeds 0.1 µA; defines safe interface voltage range for ADSL/VDSL line drivers. |
| Clamping Voltage (VC) | 9.5 V at 30 A (8/20 µs) - Peak voltage seen by protected circuit during worst-case lightning surge; enables robust downstream IC survival. |
| Junction Capacitance (CJ) | 2.5 pF max at 0 V, 1 MHz - Ultra-low signal loading on differential DSL pairs; preserves >30 MHz bandwidth without equalization. |
| ESD Rating | ±30 kV contact per IEC 61000-4-2 - Full system-level ESD immunity without additional board-level shielding or layout constraints. |
| Surge Current (IPP) | 30 A (8/20 µs) - Withstands telecom-grade lightning-induced surges when used with 220 V GDT primary protection per ITU-T K.21. |
| Package | SOT-23-6L - Flow-through pinout (Pin 1→6, Pin 3→4) enables symmetrical PCB trace routing and eliminates stubs on high-speed differential lines. |
Pinout & Package
Package: JEDEC-standard SOT-23-6L, Pb-free matte tin finish, UL 94V-0 molding compound, tape-and-reel (3000 pcs/reel). Flow-through design allows Line 1A trace to enter at Pin 1 and exit at Pin 6 (NC), and Line 1B at Pin 3 to Pin 4 (NC), preserving differential pair symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1A Anode / Input | Differential signal path input for Line 1A; connects directly to line driver output or transformer secondary. |
| Pin 2 | GND / Negative Bias | Ground reference for single-ended use; connects to negative supply in dual-voltage VDSL configurations. |
| Pin 3 | Line 1B Cathode / Input | Differential signal path input for Line 1B; complements Pin 1 for full-duplex DSL signaling. |
| Pin 4 | No Connect (NC) | Internally unconnected; allows trace routing continuity from Pin 3 without stub or via. |
| Pin 5 | +Bias Supply Input | Accepts external positive bias (e.g., +8V) to pre-charge TVS junction and eliminate startup signal distortion. |
| Pin 6 | No Connect (NC) | Internally unconnected; enables uninterrupted Line 1A trace routing beneath device body. |
Key Features
| Feature | Design Value |
|---|---|
| Snap-back clamping | 9.5 V clamping at 30 A enables lower voltage stress on protected line drivers than standard avalanche TVS devices. |
| Bias-enabled capacitance stability | 0.15 pF capacitance variation from 1 V to 8 V reverse bias ensures consistent signal transmission across full operating range. |
| Flow-through SOT-23-6L layout | Pins 1→6 and 3→4 allow straight-line differential trace routing, minimizing skew and impedance discontinuities on G.Fast/VDSL lines. |
| IEC 61000-4-5 compliant secondary protection | Validated with 220 V GDT primary stage to meet ITU-T K.21 surge immunity requirements for central office and CPE equipment. |
| Low leakage current | <0.1 µA at 8 V and 85°C prevents bias network loading and maintains signal DC balance in long-haul DSL links. |
Applications
| G.Fast Customer Premise Equipment | ADSL/VDSL Modem Line Drivers |
|---|---|
|
Use Scenario: Protecting G.Fast line drivers in residential gateways exposed to ESD events during installation or maintenance. IC Role / Device Role / Timing Role: Secondary transient protector placed between line driver output and transformer, triggered only after primary GDT conduction. Use Value: 2.5 pF capacitance avoids signal degradation at 106 MHz G.Fast frequencies, while ±30 kV ESD rating eliminates field returns due to handling damage. |
Use Scenario: Securing analog front-end outputs of ADSL2+ or VDSL2 line drivers in broadband modems deployed in electrically noisy environments. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS array providing snap-back clamping to limit transient overvoltage to 9.5 V during lightning-induced surges. Use Value: Biasable architecture (Pin 5) eliminates startup distortion, ensuring reliable bit-error-rate performance during first power-up after surge exposure. |
| VDSL2 Class-H Central Office Line Cards | G.Fast Access Network Equipment |
|
Use Scenario: Protecting high-voltage VDSL2 Class-H line drivers in DSLAMs where dual-polarity bias (±12 V) is applied to maintain common-mode rejection. IC Role / Device Role / Timing Role: Dual-rail TVS configured with Pin 2 tied to –12 V and Pin 5 to +12 V, enabling symmetric clamping on differential pairs. Use Value: 30 A surge rating and 9.5 V clamping ensure sustained operation under repeated K.21-compliant 10/700 µs surges without parameter drift or failure. |
Use Scenario: Safeguarding G.Fast line drivers in street cabinet equipment subjected to induced surges from nearby AC power lines per ITU-T K.44. IC Role / Device Role / Timing Role: Secondary protector coordinated with 220 V GDT to absorb residual energy after primary diversion, limiting let-through voltage to protected ICs. Use Value: Solid-state silicon-avalanche construction provides sub-100 ns response time and no wear-out mechanism, supporting 15+ year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-08HTG | Higher VRWM (12 V), 3.5 pF max capacitance, SOD-323 package - lacks bias pins and flow-through routing. | Targeted at lower-frequency ADSL2+ only; unsuitable for G.Fast >100 MHz due to higher capacitance and non-symmetrical layout. | Select only if working voltage margin requires ≥12 V standoff and G.Fast bandwidth is not required. |
| SRV05-4 | 5 V VRWM, 0.8 pF typical capacitance, SOT-23-6 package - uses standard avalanche (not snap-back) clamping with 15 V VC at 24 A. | Optimized for USB/Ethernet ESD protection; lacks IEC 61000-4-5 surge rating and bias architecture for DSL line drivers. | Choose for cost-sensitive consumer electronics with <5 V interfaces; avoid for telecom line driver secondary protection. |
Compared with SP1003-08HTG and SRV05-4, the TClamp0882S.TCT uniquely combines 8 V working voltage, snap-back clamping, bias-controlled capacitance stability, and flow-through SOT-23-6L routing - making it the only option qualified for G.Fast and VDSL2 Class-H secondary protection per ITU-T K-series standards.
Availability
TClamp0882S.TCT is available at Aetrix Electronics and suitable for G.Fast access equipment, DSL modem production, and central office line card manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TClamp0882S.TCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal semiconductors for precision sensing, protection, and signal integrity.
The TClamp® family was developed specifically for secondary surge and ESD protection in high-speed wired communication interfaces - with emphasis on DSL, G.Fast, and Ethernet physical layers where low capacitance and fast clamping are critical.
FAQ
What is the maximum clamping voltage of the TClamp0882S.TCT during a 30A 8/20µs surge?
The TClamp0882S.TCT clamps to a maximum of 9.5 V when subjected to a 30 A, 8/20 µs surge current waveform, measured across Pins 1 and 3. This snap-back clamping voltage is guaranteed per the datasheet's combination waveform test (1.2/50 µs voltage + 8/20 µs current, RS = 2 Ω), ensuring downstream line drivers experience minimal overvoltage stress.
How does the bias functionality of the TClamp0882S.TCT improve signal integrity in G.Fast applications?
The TClamp0882S.TCT uses internal bias diodes connected to Pin 5 (+Bias) and Pin 2 (GND or –Bias) to pre-charge its TVS junction capacitance before signal transmission begins. This eliminates the initial charging transient that would otherwise distort the first few symbols of a G.Fast burst, ensuring stable BER performance from power-up - a feature confirmed in Semtech's SI16-03 application note.
Can the TClamp0882S.TCT be used in VDSL2 Class-H line drivers with ±12V supplies?
Yes - the TClamp0882S.TCT supports dual-voltage biasing: Pin 5 connects to the positive rail (+12 V) and Pin 2 to the negative rail (–12 V), enabling symmetric clamping on differential VDSL2 Class-H line pairs. Its 8 V VRWM is compatible with the ±12 V peak-to-peak swing, and its 30 A surge rating meets ITU-T K.21 requirements when paired with a 220 V GDT.
What is the junction capacitance specification of the TClamp0882S.TCT and why is it critical for DSL interfaces?
The TClamp0882S.TCT has a maximum junction capacitance of 2.5 pF (measured at 0 V, 1 MHz, Pins 1–3), with only 0.15 pF variation from 1 V to 8 V reverse bias. This ultra-low, stable capacitance prevents high-frequency signal attenuation and phase distortion on DSL differential pairs - essential for maintaining >30 MHz bandwidth in VDSL2 and >100 MHz in G.Fast without equalizer compensation.
Is the TClamp0882S.TCT RoHS and REACH compliant?
Yes - the TClamp0882S.TCT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its matte tin lead finish and UL 94V-0 molding compound are documented in the mechanical characteristics section of the Rev 2.0 datasheet.
TCLAMP0882S.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- TClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 9.5V (Typ)
- Current - Peak Pulse (10/1000µs):
- 30A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1.2pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TCLAMP0882S.TCT FAQ
1.How can I place an order for TCLAMP0882S.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TCLAMP0882S.TCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TCLAMP0882S.TCT reliable?
The price and inventory of TCLAMP0882S.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCLAMP0882S.TCT is usually 5 days.
3.What payment methods are accepted for TCLAMP0882S.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCLAMP0882S.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCLAMP0882S.TCT?
TCLAMP0882S.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCLAMP0882S.TCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TCLAMP0882S.TCT?
For technical support, including TCLAMP0882S.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCLAMP0882S.TCT requirements.
6.How does Aetrix verify that TCLAMP0882S.TCT is sourced from the original manufacturer or authorized distributors?
All TCLAMP0882S.TCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TCLAMP0882S.TCT meets industry standards.
7.What is the process for return or replacement of TCLAMP0882S.TCT?
All TCLAMP0882S.TCT units undergo pre-shipment inspection (PSI). If there is an issue with TCLAMP0882S.TCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TCLAMP0882S.TCT part is unused and in its original packaging.
Return procedure for TCLAMP0882S.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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