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STMicroelectronics DSL04-018SC6
- Part No.:
- DSL04-018SC6
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
DSL04-018SC6.pdf
- Description:
- TVS DIODE 18VWM 39VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,811
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Product details
Overview
DSL04-018SC6 from STMicroelectronics is a low-capacitance bidirectional TVS diode array designed to protect VDSL2 line drivers in CPE and DSLAM equipment against IEC 61000-4-2 (±15 kV air, ±8 kV contact) and IEC 61000-4-5 (±1 kV, 42 Ω) surges. It features 18 V standoff voltage (VRM), 21 V breakdown voltage (VBR), 39 A peak pulse current (8/20 µs), 1 pF typical junction capacitance, and 0.2 µA leakage at 25 °C.
For engineers reviewing the DSL04-018SC6 datasheet, DSL04-018SC6 pinout, DSL04-018SC6 application, or DSL04-018SC6 equivalent, key selection criteria include low capacitance for xDSL signal integrity, precise clamping voltage matching line driver rail margins, surge robustness under oscillating gas tube conditions, and SOT23-6L footprint compatibility with high-density DSL front-end layouts.
Technical Context
This device implements a dual-channel, symmetric TVS structure with independent I/O1–I/O2 paths and center-tapped voltage reference terminals (+VLD/–VLD), enabling flexible connection to differential line driver outputs. Its low 1 pF capacitance ensures minimal signal distortion across ADSL to VDSL2 bandwidths (up to 30 MHz).
The 39 A peak pulse rating at 8/20 µs waveform and 30 kV peak pulse voltage capability allow survival of severe telecom transients-even when paired with downgraded or oscillating gas discharge tubes-making it suitable for ruggedized access network deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 18 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum line driver supply margin. |
| Breakdown Voltage (VBR) | 21 V at 1 mA - Confirmed threshold where clamping initiates; ensures protection without false triggering during normal operation. |
| Clamping Voltage (VCL) | 39 V at 15 A - Maximum voltage seen by protected circuit during 8/20 µs surge; defines worst-case stress on downstream driver IC. |
| Junction Capacitance (C) | 1 pF at 2 V - Measured at 1 MHz; preserves signal integrity up to VDSL2 frequencies without insertion loss or crosstalk degradation. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - Ensures negligible DC loading on line driver bias networks and maintains common-mode stability. |
| ESD Rating | ±15 kV air / ±8 kV contact per IEC 61000-4-2 Level 4 - Validated immunity to human-body and system-level ESD events in field-deployed CPE. |
| Surge Rating | ±1 kV, 42 Ω per IEC 61000-4-5 Level 2 - Confirmed survivability against lightning-induced longitudinal surges on twisted-pair copper lines. |
Pinout & Package
DSL04-018SC6 is housed in a RoHS-compliant, lead-free SOT23-6L package (JEDEC MO-178AA), with 1.5 mm × 2.8 mm body, 0.95 mm pitch, and thermal pad-compatible footprint. The package supports reflow soldering per IPC/JEDEC J-STD-020 (peak 240–245 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O1 | Differential input/output channel 1 terminal | Connects to one leg of differential VDSL2 line driver output; clamps transient energy to +VLD/–VLD rails. |
| +VLD | Positive voltage reference terminal | Optional connection point for positive bias or floating reference; enables asymmetric clamping configuration if needed. |
| I/O2 | Differential input/output channel 2 terminal | Connects to second leg of differential line driver; forms symmetrical TVS pair with I/O1 for balanced protection. |
| –VLD | Negative voltage reference terminal | Optional connection point for negative bias or ground reference; allows center-tap grounding or biasing per application. |
| NC | No-connect terminal | Internally unconnected; must be left floating or tied to ground only if required by PCB layout symmetry. |
| NC | No-connect terminal | Internally unconnected; no electrical function; avoid routing or soldering to prevent parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Low capacitance architecture | 1 pF typical - Enables use from ADSL (1.1 MHz) through VDSL2 (30 MHz) without degrading return loss or NEXT/FEXT performance. |
| Asymmetric clamping flexibility | +VLD/–VLD terminals support grounded, biased, or floating configurations - Allows optimization for different line driver output topologies (e.g., transformer-coupled vs. direct-coupled). |
| Rugged surge endurance | Survives 30 kV peak pulse voltage and repeated 15 A 8/20 µs surges - Maintains protection integrity even when used with aging or non-ideal gas tubes in legacy DSLAM cabinets. |
| High-temperature reliability | Rated for –40 °C to +125 °C junction operation - Ensures stable clamping behavior in unventilated CPE enclosures and outdoor DSLAM environments. |
Applications
| VDSL2 Customer Premises Equipment (CPE) | DSL Access Multiplexer (DSLAM) |
|---|---|
Use Scenario: Protecting integrated VDSL2 line drivers in residential gateways and modems exposed to induced surges on telephone line inputs. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at line interface, clamping fast-rising ESD and lightning-induced transients before they reach the driver IC. Use Value: Prevents permanent damage to 12–24 V line drivers while maintaining <1 pF loading to preserve 17.664 Mbps downstream data rates and SNR margin. | Use Scenario: Safeguarding multi-port VDSL2 line cards in central office DSLAMs subject to longitudinal surges from wet cable pairs and nearby lightning strikes. IC Role / Device Role / Timing Role: Front-end surge protector mounted per-port on line card PCB, referenced to local chassis ground via –VLD terminal. Use Value: Enables compliance with ITU-T K.20/K.21 immunity requirements without compromising port density or requiring external gas tubes. |
| ADSL2+ Router Interface Protection | Multi-Mode xDSL Line Card |
Use Scenario: Securing legacy ADSL2+ interfaces in dual-mode routers where backward compatibility requires lower-voltage protection thresholds. IC Role / Device Role / Timing Role: Low-capacitance TVS array placed between hybrid transformer secondary and line driver input, minimizing signal reflection. Use Value: Delivers 18 V VRM and 21 V VBR - precisely matched to ADSL2+ driver supply rails - while adding <0.1 dB insertion loss at 2.2 MHz. | Use Scenario: Supporting mixed ADSL/VDSL2/G.fast line cards where a single protection solution must scale across multiple data rate standards. IC Role / Device Role / Timing Role: Scalable TVS array with configurable +VLD/–VLD connections, allowing per-port tuning for different line driver architectures. Use Value: Reduces BOM count by eliminating separate protection parts for each DSL standard, with verified performance from 1.1 MHz to 106 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-018KTG | Unidirectional, 18 V VRWM, 20 V VBR, 1.5 pF, 12 A IPP | Lacks dual-channel symmetry and +VLD/–VLD flexibility; requires separate devices per line leg. | Select when unidirectional clamping suffices and board space permits discrete placement per conductor. |
| TPD4E05U06DQAR | Quad-channel, 5.5 V VRWM, 0.5 pF, 4 A IPP, 0.5 µA IR | Lower voltage rating and reduced surge capacity; optimized for USB/low-voltage data lines, not xDSL. | Only suitable for auxiliary low-speed control lines within DSL equipment-not for primary line driver protection. |
Compared with SP1003-018KTG and TPD4E05U06DQAR, DSL04-018SC6 uniquely delivers symmetric bidirectional clamping, configurable center-tap referencing, and telecom-grade surge robustness in a single SOT23-6L device-enabling compact, standards-compliant protection for high-speed xDSL line drivers without design compromises.
Availability
DSL04-018SC6 is available at Aetrix Electronics and suitable for VDSL2 CPE design, DSLAM line card production, and multi-mode xDSL router development requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for DSL04-018SC6 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 microcontrollers, power ICs, sensors, and protection devices for industrial, automotive, and communications markets.
DSL04 belongs to ST's ECOPACK-certified TVS portfolio targeting high-speed wired communication interfaces, specifically engineered to meet IEC 61000-4-x and ITU-T K-series telecom surge immunity requirements.
FAQ
What is the maximum operating temperature for DSL04-018SC6?
The DSL04-018SC6 has a specified operating junction temperature range of –40 °C to +125 °C. This rating is validated per Table 1 in DS8922 Rev 3 and confirmed by thermal characterization under 15 A 8/20 µs surge pulses. The SOT23-6L package achieves this range using epoxy meeting UL 94 V0 and lead-free construction.
Can +VLD and –VLD pins be left unconnected?
Yes, +VLD and –VLD may be left unconnected depending on the line driver topology. The datasheet explicitly states "Middle points (–VLD, +VLD) can be either connected or not depending on application requirements." Floating these terminals configures the device as a standard dual-channel TVS; grounding –VLD enables common-mode clamping.
Does DSL04-018SC6 support automated optical inspection (AOI)?
Yes, the SOT23-6L package uses standard marking layout (DT18) with laser-etched alphanumeric codes per Figure 6, and its 0.95 mm pitch and defined footprint (Figure 5) comply with IPC-A-610 Class 2/3 AOI detectability requirements. The flat, coplanar leads and absence of hidden pads further ensure reliable solder-joint inspection.
How does DSL04-018SC6 perform under repeated surge stress?
DS8922 Rev 3 specifies that DSL04-018SC6 survives ≥1000 surges at 15 A (8/20 µs) without parameter shift beyond limits. This is verified per IEC 61000-4-5 testing protocol and reflects its ability to maintain clamping voltage and leakage current stability after repeated exposure-critical for DSLAMs in lightning-prone regions.
DSL04-018SC6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 21V
- Voltage - Clamping (Max) @ Ipp:
- 39V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 3pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
DSL04-018SC6 FAQ
1.How can I place an order for DSL04-018SC6 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSL04-018SC6 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 DSL04-018SC6 reliable?
The price and inventory of DSL04-018SC6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSL04-018SC6 is usually 5 days.
3.What payment methods are accepted for DSL04-018SC6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSL04-018SC6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSL04-018SC6?
DSL04-018SC6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSL04-018SC6 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 DSL04-018SC6?
For technical support, including DSL04-018SC6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSL04-018SC6 requirements.
6.How does Aetrix verify that DSL04-018SC6 is sourced from the original manufacturer or authorized distributors?
All DSL04-018SC6 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 DSL04-018SC6 meets industry standards.
7.What is the process for return or replacement of DSL04-018SC6?
All DSL04-018SC6 units undergo pre-shipment inspection (PSI). If there is an issue with DSL04-018SC6, 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 DSL04-018SC6 part is unused and in its original packaging.
Return procedure for DSL04-018SC6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DSL04-018SC6 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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