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Diodes Incorporated ALS5W13A
- Part No.:
- ALS5W13A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS5W13A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:5,977
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Product details
Overview
ALS5W13A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, rated for 13 V stand-off voltage, 14.4–15.9 V breakdown, 3600 W peak pulse power (10/1000 µs), and 500 A forward surge current. It serves as a clamping diode for automotive ECU modules to protect sensitive electronics against ISO 7637-2 and ISO 16750-2 load dump transients.
For engineers reviewing the ALS5W13A datasheet, ALS5W13A pinout, ALS5W13A application, or ALS5W13A equivalent, this device is selected for high-temperature automotive power rail protection where low thermal resistance, AEC-Q101 qualification, and 175 °C junction operation are required - not for signal-level or bidirectional suppression.
Technical Context
This TVS diode operates unidirectionally with anode-connected heatsink configuration, enabling robust conduction during positive-going load dump events. Its 13.0 V stand-off voltage ensures stable blocking below system nominal voltage while allowing fast clamping above 14.4 V breakdown threshold.
Designed for 10/1000 µs exponential surge waveforms, it delivers 3600 W peak pulse power at 25 °C, derating linearly to ~1100 W at 175 °C case temperature per Fig.1. Clamping voltage is specified at 21.5 V under 167 A peak pulse current, supporting tight overvoltage margins in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.0 V - Maximum reverse voltage before significant leakage; sets operating margin below load dump onset. |
| VBR (min/max) | 14.4 V / 15.9 V - Confirmed breakdown range at 5 mA; defines clamping initiation threshold. |
| PPPM (10/1000 µs) | 3600 W - Peak transient energy handling capacity at room temperature; supports ISO 7637-2 Pulse 5a. |
| IPPM | 167 A - Peak pulse current at VC = 21.5 V; determines minimum trace/solder joint current rating. |
| VC | 21.5 V - Clamped voltage at IPPM; limits downstream IC stress during worst-case load dump. |
| TJ Range | −55 °C to +175 °C - Full automotive junction temperature range; enables under-hood deployment without derating loss. |
| IF Surge | 500 A (8.3 ms half-sine) - Forward surge capability; sustains repeated cranking or alternator regulation faults. |
Pinout & Package
ALS5W13A uses the DO-218 plastic package with integrated heatsink tab. The anode is electrically connected to the metal heatsink base, and the cathode is marked by a band on the molded body. Mounting requires thermal pad design per Diodes' recommended soldering pad layout for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Power input / GND return path | Electrically active anode terminal; must be soldered to large copper pour for thermal management and low-inductance grounding. |
| Cathode (Banded End) | Clamping output / Transient sink | Connected to protected 12 V rail; conducts surge current to anode/heatsink when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| Low thermal resistance | RθJC ≈ 0.35 °C/W (typical); enables >1 kW sustained dissipation with minimal case-to-junction delta-T. |
| ISO 7637-2 & ISO 16750-2 compliant | Passes Pulse 5a (load dump) testing up to 100 V/100 ms with no degradation or parametric shift. |
| Lead-free, halogen-free "Green" construction | RoHS 3 compliant with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; meets automotive environmental requirements. |
Applications
| Automotive Load Dump Protection | ECU Power Rail Clamping |
|---|---|
Use Scenario: Protecting engine control units during alternator field-circuit disconnection events generating up to 100 V transients. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and ECU input filter capacitor. Use Value: Limits rail voltage to ≤21.5 V during 167 A surges, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding infotainment head units exposed to load dump in shared vehicle battery networks. IC Role / Device Role / Timing Role: Primary transient suppressor on main 12 V input, upstream of PMIC and LDO regulators. Use Value: Maintains system uptime by clamping within 100 ns, avoiding brownout resets during 10 ms exponential load dump pulses. |
| LED Headlamp Driver Protection | Body Control Module (BCM) Input Stage |
Use Scenario: Shielding constant-current LED drivers from voltage spikes induced by relay switching in lighting circuits. IC Role / Device Role / Timing Role: Standoff-clamp TVS on driver supply input, sized for 13 V nominal system. Use Value: Withstands 500 A surge peaks without failure, ensuring lamp functionality remains intact after repeated load dump events. | Use Scenario: Securing BCM power inputs connected to fused battery feeds subject to intermittent short-circuits and alternator regulation faults. IC Role / Device Role / Timing Role: High-energy transient absorber mounted directly at PCB edge connector entry point. Use Value: Provides 3600 W pulse handling at 25 °C and retains >1100 W capability at 175 °C case, matching BCM under-dash thermal environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load dump protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | DO-214AC package; 300 W PPPM; 13.0 V VWM; 21.5 V VC at 13.3 A | Rated for lower-energy transients only; insufficient for ISO 7637-2 Pulse 5a compliance | Select only for non-automotive 12 V systems with <500 W surge exposure. |
| SMCJ13A | DO-214AB package; 1500 W PPPM; same VWM/VC; 69.4 A IPPM | Lacks AEC-Q101 qualification and 175 °C operation; limited to industrial ambient conditions | Acceptable for commercial-grade automotive accessories but not for ECU or safety-critical modules. |
Compared with SMAJ13A and SMCJ13A, ALS5W13A uniquely combines AEC-Q101 qualification, 3600 W pulse rating, and 175 °C operation in a thermally optimized DO-218 package - making it the only option validated for front-end load dump protection in modern engine control units.
Availability
ALS5W13A is available at Aetrix Electronics and suitable for automotive ECU protection, LED headlamp driver safeguarding, body control module input conditioning, and other high-reliability applications requiring stable component supply across extended temperature and surge environments.
Supply support for ALS5W13A 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 ALS5WxxA series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for load dump suppression in 12 V vehicle electrical systems - emphasizing thermal robustness, surge endurance, and AEC-Q101 compliance.
FAQ
What is the polarity configuration of ALS5W13A, and how must it be mounted?
ALS5W13A is unidirectional with the anode connected to the metal heatsink tab and the cathode identified by a band on the molded body. It must be mounted with the heatsink tab soldered to a large copper area serving as both thermal path and circuit ground return. Reverse mounting will cause catastrophic failure during load dump events.
Does ALS5W13A meet ISO 7637-2 Pulse 5a requirements out-of-the-box?
Yes - ALS5W13A is explicitly tested and qualified to ISO 7637-2 Pulse 5a (load dump) and ISO 16750-2 transient specifications per Diodes' datasheet Rev-4. Compliance is verified at full rated power (3600 W) and across the −40 °C to +125 °C ambient range, with no external components required.
How does thermal performance compare between ALS5W13A and standard SMB/SMA TVS diodes?
ALS5W13A's DO-218 package provides RθJC ≈ 0.35 °C/W - roughly 4× better than SMB (RθJC ≈ 1.4 °C/W) and 6× better than SMA (RθJC ≈ 2.1 °C/W). This allows sustained 1.2 kW dissipation at 175 °C case temperature, whereas SMB/SMA devices fail thermally under identical load dump conditions.
Can ALS5W13A be used in 24 V truck systems?
No - ALS5W13A is designed exclusively for 12 V nominal automotive systems. Its 13 V stand-off voltage and 21.5 V clamping voltage are incompatible with 24 V rail protection. For 24 V applications, Diodes recommends ALS5W26A (26 V VWM) or ALS5W30A (30 V VWM), both sharing identical DO-218 packaging and qualification.
ALS5W13A 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):
- 167A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
ALS5W13A FAQ
1.How can I place an order for ALS5W13A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS5W13A 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 ALS5W13A reliable?
The price and inventory of ALS5W13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS5W13A is usually 5 days.
3.What payment methods are accepted for ALS5W13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS5W13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS5W13A?
ALS5W13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS5W13A 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 ALS5W13A?
For technical support, including ALS5W13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS5W13A requirements.
6.How does Aetrix verify that ALS5W13A is sourced from the original manufacturer or authorized distributors?
All ALS5W13A 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 ALS5W13A meets industry standards.
7.What is the process for return or replacement of ALS5W13A?
All ALS5W13A units undergo pre-shipment inspection (PSI). If there is an issue with ALS5W13A, 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 ALS5W13A part is unused and in its original packaging.
Return procedure for ALS5W13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS5W13A Tags
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