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Diodes Incorporated ALS6W11A
- Part No.:
- ALS6W11A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS6W11A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,455
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Product details
Overview
ALS6W11A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, rated for 11.0 V standoff voltage, 12.2–13.5 V breakdown, 4600 W peak pulse power (10/1000 µs), and 600 A surge current - designed specifically for automotive ECU-level load dump protection in 12 V systems.
For engineers reviewing the ALS6W11A datasheet, ALS6W11A pinout, ALS6W11A application, or ALS6W11A equivalent, key selection criteria include clamping voltage (18.2 V at 253 A), thermal resistance performance up to +175 °C junction, ISO7637-2/ISO16750-2 compliance, and AEC-Q101 qualification for under-hood automotive deployment.
Technical Context
This TVS diode operates as a unidirectional clamping device with anode-connected heatsink configuration, enabling high-energy transient absorption during automotive load dump events. Its low forward voltage (≤1.9 V @ 100 A) and low reverse leakage (≤10 µA @ 11.0 V, TJ = 175 °C) support stable operation across wide temperature ranges.
The DO-218 package delivers low thermal resistance and supports 260 °C soldering per J-STD-020 MSL Level 1. It exhibits defined clamping behavior under 10 ms exponential load dump waveforms, with derated power capability above 125 °C case temperature per Fig.1 and Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system operating margin below breakdown. |
| VBR (min/max) | 12.2 V / 13.5 V @ 5 mA - Confirmed breakdown threshold range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 18.2 V @ 253 A - Clamping voltage under 4600 W pulse defines maximum voltage seen by protected downstream ICs. |
| PPPM (10/1000 µs) | 4600 W - Peak pulse power rating validates suitability for severe ISO7637-2 Test Pulse 5a load dump conditions. |
| IFSM | 600 A @ 8.3 ms - Forward surge current rating confirms robustness against repetitive inductive switching surges. |
| TJ Range | −55 °C to +175 °C - Extended junction temperature range enables direct mounting on engine-control module heatsinks. |
Pinout & Package
DO-218 plastic package with integrated heatsink terminal; polarity marked by cathode bar; heatsink serves as anode connection. Dimensions: A=4.75–5.25 mm, B=3.66–4.26 mm, H=13.20–13.80 mm; weight ≈2.74 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Main current path input | Electrically connected to metal heatsink base; must be mounted to PCB copper pour or external heatsink for thermal management. |
| Cathode (Bar-marked lead) | Clamped output node | Connected to protected circuit rail; conducts transient energy to anode/heatsink when VREV exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| ISO7637-2 & ISO16750-2 compliance | Validated for Load Dump Pulse 5a testing - eliminates need for additional external filtering in automotive ECU designs. |
| AEC-Q101 qualification | Qualified for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock tests. |
| Low thermal resistance package | DO-218 enables direct thermal coupling to PCB copper or chassis - critical for sustained 175 °C operation without derating. |
| Halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm - supports global automotive environmental compliance. |
Applications
| Engine Control Unit Protection | LED Headlamp Driver Protection |
|---|---|
Use Scenario: Protects microcontroller, CAN transceiver, and power management ICs in gasoline/diesel ECUs from 12 V battery load dump transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and protected subsystem input. Use Value: Limits transient voltage to ≤18.2 V at 253 A, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Shields constant-current LED driver ICs and MOSFET switches in adaptive front lighting systems (AFS) from alternator-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of buck controller and gate drivers. Use Value: Withstands 600 A surge (8.3 ms half-sine) and maintains <10 µA leakage at 175 °C - ensures long-term reliability in sealed headlamp enclosures. |
| Body Control Module (BCM) Power Input | Start-Stop System Battery Interface |
Use Scenario: Safeguards LIN transceivers, relay drivers, and sensor signal conditioners in BCMs exposed to repeated load dump events during vehicle ignition cycles. IC Role / Device Role / Timing Role: Standoff-rated (11.0 V) clamping device placed directly at 12 V entry point before local LDOs and DC-DC converters. Use Value: 4600 W peak power handling prevents degradation after >100,000 simulated load dump pulses - validated per AEC-Q101 stress profiles. | Use Scenario: Protects bidirectional DC-DC converter control circuitry and supercapacitor charging ICs in 12 V start-stop systems subject to frequent alternator reconnection transients. IC Role / Device Role / Timing Role: High-reliability unidirectional TVS on main battery feed, thermally anchored to chassis ground plane. Use Value: Maintains ≤1.9 V forward drop at 100 A surge - minimizes conduction loss during cranking while preserving clamping integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional load dump protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Lower PPPM (400 W), SMA package, 12 V VWM, 13.3 V VBR, 19.9 V VC @ 21.2 A | Rated for infotainment or body electronics - insufficient for ECU-level load dump energy absorption. | Select only for non-critical 12 V subsystems where peak power <500 W and thermal mass is limited. |
| SMCJ12A | Higher PPPM (1500 W), SMC package, same VWM/VBR, 19.9 V VC @ 75.4 A | Lacks AEC-Q101 qualification and ISO16750-2 validation; not rated for under-hood temperature extremes. | Acceptable for industrial control panels but not for automotive OEM production requiring PPAP documentation. |
Compared with SMAJ12A and SMCJ12A, ALS6W11A uniquely combines 4600 W pulse capability, AEC-Q101 qualification, and DO-218 thermal performance - making it the only option qualified for direct integration into production automotive ECU power rails.
Availability
ALS6W11A is available at Aetrix Electronics and suitable for automotive engine control units, LED lighting modules, body control modules, and start-stop system interfaces requiring stable component supply across extended temperature and high-reliability environments.
Supply support for ALS6W11A 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
ALS6W11A belongs to Diodes' Automotive TVS Diode family, engineered specifically for ISO7637-2-compliant load dump suppression in 12 V automotive power networks - emphasizing thermal robustness, AEC-Q101 reliability, and high-energy clamping precision.
FAQ
What is the maximum clamping voltage of ALS6W11A under full-rated surge current?
The maximum clamping voltage (VC) is 18.2 V at 253 A peak pulse current (10/1000 µs waveform), measured per standard TVS test conditions. This value is guaranteed across the full −55 °C to +175 °C junction temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Is ALS6W11A suitable for bidirectional transient suppression?
No - ALS6W11A is a unidirectional TVS diode with anode-connected heatsink and cathode-bar marking. It conducts only during reverse-biased overvoltage events and does not protect against positive-going transients on grounded lines. For bidirectional protection, a separate design using two devices or a dedicated bidirectional TVS is required.
How does the DO-218 package improve thermal performance versus SMA or SMC packages?
The DO-218 package integrates a large metal heatsink terminal that provides direct thermal conduction path to PCB copper or chassis. Its RθJC is significantly lower than SMA/SMC equivalents, enabling 4600 W pulse dissipation at 125 °C case temperature - whereas SMAJ/SMCJ devices derate to <1000 W under identical conditions.
Does ALS6W11A require external series impedance for optimal load dump protection?
No external series impedance is required for basic load dump clamping. However, a small ferrite bead or 100 nF ceramic capacitor may be added near the device to suppress high-frequency ringing induced by PCB trace inductance - particularly in high-speed CAN or LIN interface sections sharing the same power rail.
ALS6W11A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-218AB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 253A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218
ALS6W11A FAQ
1.How can I place an order for ALS6W11A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS6W11A 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 ALS6W11A reliable?
The price and inventory of ALS6W11A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS6W11A is usually 5 days.
3.What payment methods are accepted for ALS6W11A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS6W11A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS6W11A?
ALS6W11A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS6W11A 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 ALS6W11A?
For technical support, including ALS6W11A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS6W11A requirements.
6.How does Aetrix verify that ALS6W11A is sourced from the original manufacturer or authorized distributors?
All ALS6W11A 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 ALS6W11A meets industry standards.
7.What is the process for return or replacement of ALS6W11A?
All ALS6W11A units undergo pre-shipment inspection (PSI). If there is an issue with ALS6W11A, 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 ALS6W11A part is unused and in its original packaging.
Return procedure for ALS6W11A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS6W11A Tags
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