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STMicroelectronics DSL05-012SC6
- Part No.:
- DSL05-012SC6
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
DSL05-012SC6.pdf
- Description:
- TVS DIODE 10VWM SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
DSL05-012SC6 from STMicroelectronics is a low-capacitance bidirectional TVS diode array designed for secondary surge protection of VDSL2 and G.FAST line drivers. It features a 12 V stand-off voltage (VRM), 12.8 V breakdown voltage (VBR), 0.95 pF typical capacitance, 30 A peak pulse current (8/20 µs), and SOT23-6L package - enabling high-speed DSL signal integrity in telecom CPE and infrastructure equipment.
For engineers reviewing the DSL05-012SC6 datasheet, DSL05-012SC6 pinout, DSL05-012SC6 application, or DSL05-012SC6 equivalent, key selection criteria include clamping voltage at 10 A (≤25 V), leakage current ≤50 nA at 25 °C, thermal stability up to +150 °C junction temperature, and compliance with GR-1089, ITU-T K20/21/45, and IEC 61000-4-2/4-5.
Technical Context
This device implements a monolithic silicon avalanche diode structure optimized for fast transient response and low parasitic capacitance across differential DSL line pairs. Its dual-channel architecture protects both I/O1–I/O2 and ±VLD terminals independently while maintaining sub-1 pF inter-terminal capacitance at 2 V bias.
The SOT23-6L layout supports direct placement across twisted-pair lines without degrading signal rise time; clamping begins at 12 V and limits to ≤25 V under 10 A 8/20 µs surge, preserving downstream driver ICs during AC power fault and lightning-induced surges per Telcordia GR-1089.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 12 V - Maximum continuous operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 12.8 V min @ 1 mA - Ensures reliable triggering before line driver overvoltage damage |
| Clamping Voltage (VC) | ≤25 V @ 10 A, 8/20 µs - Limits transient energy delivered to protected IC |
| Junction Capacitance (CJ) | 0.95 pF typ @ 2 V - Enables support up to G.FAST (212 MHz) without signal distortion |
| Peak Pulse Current (IPP) | 30 A @ 8/20 µs - Meets GR-1089 Level 3 surge immunity requirements |
| Leakage Current (IR) | ≤50 nA @ 25 °C - Prevents DC loading on high-impedance line drivers |
| Operating Junction Temp | −55 to +150 °C - Supports deployment in uncontrolled outdoor cabinets and DSLAMs |
Pinout & Package
DSL05-012SC6 is housed in a RoHS-compliant, lead-free SOT23-6L package (ECOPACK® grade), measuring 2.8–3.05 mm × 1.5–1.75 mm × 1.3–1.6 mm, with gull-wing leads and tape-and-reel delivery (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No connect | Unused terminal; must remain floating or grounded per layout guidelines |
| Pin 2 (+VLD) | Positive line driver supply rail | Provides transient path from +VLD to I/O1/I/O2 during overvoltage events |
| Pin 3 (NC) | No connect | Unused terminal; must remain floating or grounded per layout guidelines |
| Pin 4 (I/O1) | Differential data line 1 | Primary protected signal path for xDSL/G.FAST transmit/receive pair |
| Pin 5 (−VLD) | Negative line driver supply rail | Provides transient path from −VLD to I/O1/I/O2 during overvoltage events |
| Pin 6 (I/O2) | Differential data line 2 | Complementary protected signal path completing full-duplex line protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional differential protection | Simultaneous clamping across I/O1–I/O2 and ±VLD rails preserves signal symmetry in full-duplex DSL links |
| 0.95 pF typical capacitance | Minimizes insertion loss and group delay variation up to 212 MHz (G.FAST), avoiding equalizer recalibration |
| 30 A 8/20 µs surge rating | Withstands repeated Telcordia GR-1089 Level 3 surges without parameter drift or bond-wire failure |
| Thermal derating support | Maintains ≥25 V clamping performance at +125 °C junction temperature, critical for sealed DSLAM enclosures |
| RoHS-compliant SOT23-6L | Enables automated pick-and-place assembly and reflow compatibility with IPC/JEDEC J-STD-020 Class 3 profiles |
Applications
| VDSL2 Customer Premises Equipment (CPE) | G.FAST Fiber Node Terminal |
|---|---|
Use Scenario: Protection of analog front-end (AFE) line drivers in residential VDSL2 modems exposed to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Secondary surge suppressor placed between transformer center-tap and line driver IC input pins. Use Value: Prevents latch-up and gate oxide rupture in ADI/Maxim DSL transceivers by limiting transient voltage to ≤25 V at 10 A. | Use Scenario: Surge hardening of G.FAST line cards in street cabinet fiber nodes subject to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Differential-mode protector across twisted-pair outputs of TI/ST G.FAST PHY ICs. Use Value: Maintains <1.0 pF inter-line capacitance to avoid return loss degradation above 106 MHz, ensuring full 212 MHz bandwidth compliance. |
| xDSL Central Office Line Card | Multi-Service Access Node (MSAN) |
Use Scenario: Secondary protection stage following gas discharge tube (GDT) primary protectors in DSLAM line cards. IC Role / Device Role / Timing Role: Fast-response clamp that activates after GDT ionization, handling residual energy and oscillatory ringing. Use Value: Survives downgraded GDT operation with <100 ns response time, eliminating need for series impedance matching networks. | Use Scenario: Integrated protection for multi-port ADSL2+/VDSL2/G.FAST combo line cards in carrier-grade MSAN platforms. IC Role / Device Role / Timing Role: Per-port bidirectional TVS array sharing common ±VLD rails across eight differential line pairs. Use Value: Reduces BOM count by 50% vs discrete diode solutions while maintaining channel-to-channel isolation >60 dB at 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DSL line protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Semtech RCLAMP0524P.TCT | Unidirectional, 5.5 V VRM, 0.3 pF CJ, 12 A IPP | Requires separate devices per polarity; unsuitable for ±VLD rail protection | Select only for single-ended low-voltage (≤6 V) interfaces like USB or Ethernet PHYs |
| ON Semiconductor ESD7L5.0DGT7G | Unidirectional, 5.0 V VRM, 0.65 pF CJ, 12 A IPP, SOD-523 | Lacks ±VLD terminals; incompatible with dual-rail DSL driver topologies | Use only for basic ESD protection on low-speed control lines, not telecom line surge |
Compared with RCLAMP0524P.TCT and ESD7L5.0DGT7G, DSL05-012SC6 uniquely integrates bidirectional differential + dual-rail protection in one SOT23-6L device, delivering verified 30 A surge handling and G.FAST-compatible capacitance - making it the only drop-in solution for VDSL2/G.FAST line driver secondary protection.
Availability
DSL05-012SC6 is available at Aetrix Electronics and suitable for VDSL2 CPE design, G.FAST node deployment, and MSAN line card manufacturing requiring stable component supply and long-term lifecycle assurance.
Supply support for DSL05-012SC6 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and automotive ICs with focus on industrial and communications reliability.
DSL05 belongs to ST's telecom protection product line, engineered specifically for secondary surge suppression in xDSL and G.FAST infrastructure where low capacitance, high surge robustness, and dual-rail compatibility are mandatory.
FAQ
What is the maximum clamping voltage of DSL05-012SC6 under a 10 A 8/20 µs surge?
The maximum clamping voltage (VC) is 25 V when subjected to a 10 A 8/20 µs transient pulse, measured between I/O1 and I/O2 terminals. This value is guaranteed across the full operating temperature range (−40 to +125 °C) and ensures safe operation of downstream line driver ICs rated for ≤30 V absolute maximum.
Can DSL05-012SC6 be used in G.FAST systems operating at 212 MHz?
Yes - its 0.95 pF typical junction capacitance (measured at 2 V, 1 MHz) and <0.25 pF variation across reverse voltage ensure minimal return loss degradation and phase distortion up to 212 MHz. Layout best practices (short traces, symmetric routing) maintain this performance in actual G.FAST PCB designs.
Does DSL05-012SC6 require external current-limiting resistors?
No - it is designed for direct connection across DSL line pairs and ±VLD rails without series impedance. Its low dynamic resistance (<0.3 Ω during clamping) and 30 A surge rating eliminate the need for external current-limiting components in standard GR-1089-compliant installations.
How does DSL05-012SC6 interface with primary gas discharge tube (GDT) protectors?
It operates as a secondary protector downstream of a GDT, absorbing residual energy and suppressing high-frequency oscillations after GDT ionization. The device's fast response (<1 ns) complements the GDT's slower turn-on, forming a coordinated two-stage protection network validated per ITU-T K21 contact surge tests.
DSL05-012SC6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-23-6
- Series:
- DSL
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 12.8V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- 30A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
DSL05-012SC6 FAQ
1.How can I place an order for DSL05-012SC6 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSL05-012SC6 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 DSL05-012SC6 reliable?
The price and inventory of DSL05-012SC6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSL05-012SC6 is usually 5 days.
3.What payment methods are accepted for DSL05-012SC6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSL05-012SC6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSL05-012SC6?
DSL05-012SC6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSL05-012SC6 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 DSL05-012SC6?
For technical support, including DSL05-012SC6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSL05-012SC6 requirements.
6.How does Aetrix verify that DSL05-012SC6 is sourced from the original manufacturer or authorized distributors?
All DSL05-012SC6 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 DSL05-012SC6 meets industry standards.
7.What is the process for return or replacement of DSL05-012SC6?
All DSL05-012SC6 units undergo pre-shipment inspection (PSI). If there is an issue with DSL05-012SC6, 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 DSL05-012SC6 part is unused and in its original packaging.
Return procedure for DSL05-012SC6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DSL05-012SC6 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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