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Diodes Incorporated ALS6W13A
- Part No.:
- ALS6W13A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS6W13A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,187
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Product details
Overview
ALS6W13A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, designed for automotive ECU protection against ISO 7637-2 and ISO 16750-2 load dump transients. It features 14.4–15.9 V breakdown voltage (VBR), 13.0 V standoff voltage (VWM), 4600 W peak pulse power (10/1000 µs), 214 A peak pulse current, and clamps to 21.5 V at rated surge - deployed as a clamping diode across battery rails in lighting and load-switching modules.
For engineers reviewing the ALS6W13A datasheet, ALS6W13A pinout, ALS6W13A application, or ALS6W13A equivalent, key selection criteria include its 175 °C junction rating, AEC-Q101 qualification, unidirectional polarity with heatsink-anode configuration, DO-218 mechanical outline compliance, and verified 260 °C soldering tolerance per J-STD-020 MSL Level 1.
Technical Context
The ALS6W13A operates as a high-energy unidirectional TVS diode optimized for automotive load dump suppression, where it clamps induced voltage spikes by entering avalanche conduction above VBR (14.4–15.9 V) while maintaining low dynamic impedance. Its thermal design supports continuous operation up to +175 °C junction temperature, with low thermal resistance enabled by the DO-218 package's integrated heatsink-anode structure.
It meets ISO 7637-2 Pulse 5a/b and ISO 16750-2 load dump test profiles under defined waveform conditions (e.g., 10 ms exponential decay), delivering stable clamping performance without degradation across temperature and surge repetition. The device exhibits ≤1.9 V forward voltage at 100 A (8.3 ms half-sine), enabling efficient energy diversion during high-current transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.0 V - Maximum reverse operating voltage before leakage exceeds 10 µA; defines safe DC bias margin below clamping threshold. |
| VBR (min/max) | 14.4 V / 15.9 V - Breakdown onset range at 5 mA test current; ensures reliable avalanche initiation within automotive battery voltage tolerances. |
| VC @ IPPM | 21.5 V - Clamping voltage at 214 A peak pulse (10/1000 µs); limits downstream IC stress during worst-case load dump events. |
| PPPM (10/1000 µs) | 4600 W - Peak transient power handling capacity; enables single-device protection for high-energy 12 V system surges. |
| IFSM | 600 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports robustness against repeated inrush or fault currents. |
| TJ Range | −55 °C to +175 °C - Extended junction temperature capability; allows placement near hot engine-control modules without derating. |
Pinout & Package
Package: DO-218 - Surface-mount plastic case with integral heatsink-anode terminal; dimensions: A=4.75–5.25 mm, B=3.66–4.26 mm, H=13.20–13.80 mm; polarity marked by cathode bar; anode connected to heatsink tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current entry point during clamping | Electrically and thermally coupled to PCB copper pour; must be soldered to ≥100 mm² thermal pad for rated power dissipation. |
| Cathode (Bar-marked Lead) | Current exit point during clamping | Connected to protected circuit rail (e.g., ECU input); polarity-sensitive installation prevents reverse-bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| ISO 7637-2 & ISO 16750-2 compliant | Passes Pulse 5a (load dump) testing up to specified energy levels without parameter shift or catastrophic failure. |
| MSL Level 1 (260 °C) | Withstands lead-free reflow without delamination or bond-wire damage; eliminates pre-bake requirement for SMT assembly. |
| Halogen- and antimony-free "Green" | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm; supports eco-compliant vehicle manufacturing. |
| Low thermal resistance | Enables 4600 W pulse power dissipation with ≤30 °C/W junction-to-case; reduces need for auxiliary heatsinking. |
Applications
| Automotive Headlamp Control Module | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects LED driver ICs and microcontrollers from 12 V battery line transients during alternator load dump events. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and input filter capacitor. Use Value: Limits voltage to 21.5 V during 4600 W surges, preventing overvoltage damage to 3.3 V/5 V logic and analog front-ends. | Use Scenario: Shields MCU power supply and CAN transceiver inputs from inductive switching noise and load dump spikes. IC Role / Device Role / Timing Role: Primary transient suppressor on main 12 V input, upstream of DC-DC converter. Use Value: Maintains functional safety integrity by clamping within 100 ns, preserving reset timing and communication uptime. |
| Body Control Module (BCM) Lighting Outputs | Start-Stop System Battery Interface |
Use Scenario: Safeguards MOSFET gate drivers and current-sense amplifiers in PWM-controlled tail-light circuits. IC Role / Device Role / Timing Role: Localized TVS at each high-side switch output node. Use Value: Withstands repetitive 214 A pulses without parameter drift, ensuring long-term reliability in stop-start cycles. | Use Scenario: Guards bidirectional DC-DC converter inputs during cranking and regenerative braking voltage excursions. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; used as unidirectional clamp on positive rail only. Use Value: Operates continuously at 175 °C ambient, eliminating thermal shutdown during extended high-load engine operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load dump suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Lower PPPM (400 W), SMA package, 13 V VWM, 200 A IPPM | Not suitable for full ISO 7637-2 Pulse 5; limited to low-energy transients in non-critical modules. | Select only for cost-sensitive interior modules where peak surge energy <500 W. |
| SMCJ13A | Higher PPPM (1500 W), SMC package, same VWM/VBR, 113 A IPPM | Passes ISO 7637-2 Pulse 5 at reduced duration; insufficient for 10 ms exponential waveforms. | Use when board space permits larger SMC footprint and system surge profile is validated to ≤1500 W. |
Compared with SMAJ13A and SMCJ13A, ALS6W13A delivers 3× higher pulse power and 2× higher peak current in the same footprint-class package, enabling single-device compliance with full automotive load dump requirements without parallel devices or external heatsinks.
Availability
ALS6W13A is available at Aetrix Electronics and suitable for automotive headlamp control, engine ECU power input, body control module lighting outputs, and start-stop system battery interfaces requiring stable component supply across production lifecycles.
Supply support for ALS6W13A 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, specializing in high-reliability components for automotive, industrial, and computing markets.
The ALS6WxxA series belongs to Diodes' AEC-Q101-qualified transient voltage suppressor product line, engineered specifically for robust load dump protection in 12 V automotive electrical systems.
FAQ
What is the maximum clamping voltage of ALS6W13A under rated surge conditions?
The ALS6W13A clamps to 21.5 V at its rated peak pulse current of 214 A (10/1000 µs waveform). This value is measured per standard TVS test conditions and guarantees voltage limiting during ISO 7637-2 load dump events. Clamping voltage remains stable across −55 °C to +175 °C junction temperature, with no derating required up to 150 °C ambient.
Is ALS6W13A suitable for bidirectional transient suppression?
No - ALS6W13A is a unidirectional TVS diode, with anode connected to the heatsink tab and cathode marked by a bar. It conducts only during positive transients on the cathode side relative to anode. For bidirectional protection, two devices must be used in series-opposing configuration, or a dedicated bidirectional part such as the D24Z33M should be selected.
How does the DO-218 package improve thermal performance over SMA or SMC packages?
The DO-218 package integrates the anode directly into a large metal heatsink tab, providing low thermal resistance (≤30 °C/W junction-to-case) and enabling direct mounting to PCB copper pours. Unlike SMA/SMC, which rely on lead-frame conduction, DO-218 transfers >70% of transient heat through the tab, supporting 4600 W pulse power without external heatsinks or thermal vias.
Does ALS6W13A require derating at elevated ambient temperatures?
Yes - power derating begins at 25 °C case temperature, following the curve in Figure 1 of the datasheet: at 125 °C case, maximum PPPM drops to ~2200 W (48% of rated 4600 W). Designers must calculate actual case temperature using thermal modeling or measurement and apply the derating factor to ensure safe operation under worst-case underhood conditions.
ALS6W13A 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 214A
- 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
ALS6W13A FAQ
1.How can I place an order for ALS6W13A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS6W13A 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 ALS6W13A reliable?
The price and inventory of ALS6W13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS6W13A is usually 5 days.
3.What payment methods are accepted for ALS6W13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS6W13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS6W13A?
ALS6W13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS6W13A 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 ALS6W13A?
For technical support, including ALS6W13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS6W13A requirements.
6.How does Aetrix verify that ALS6W13A is sourced from the original manufacturer or authorized distributors?
All ALS6W13A 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 ALS6W13A meets industry standards.
7.What is the process for return or replacement of ALS6W13A?
All ALS6W13A units undergo pre-shipment inspection (PSI). If there is an issue with ALS6W13A, 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 ALS6W13A part is unused and in its original packaging.
Return procedure for ALS6W13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS6W13A Tags
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