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Diodes Incorporated ALS6W36A
- Part No.:
- ALS6W36A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS6W36A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,869
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Product details
Overview
ALS6W36A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, rated for 36 V standoff voltage (VWM), 40.0–44.2 V breakdown (VBR), 4600 W peak pulse power (10/1000 µs), and 600 A forward surge current (IFSM). It serves as a clamping diode for automotive ECU modules to protect sensitive electronics against ISO7637-2 and ISO16750-2 load dump transients.
For engineers reviewing the ALS6W36A datasheet, ALS6W36A pinout, ALS6W36A application, or ALS6W36A equivalent, key selection criteria include its 36 V VWM rating, 58.1 V clamping voltage at 79 A IPPM, AEC-Q101 qualification, DO-218 thermal performance, and unidirectional polarity with heatsink-anode configuration.
Technical Context
The ALS6W36A operates as a unidirectional TVS diode optimized for high-energy automotive load dump suppression. Its junction temperature range spans −55 °C to +175 °C, and it delivers 4600 W peak pulse power under 10/1000 µs waveform while maintaining ≤1.9 V forward voltage at 100 A (8.3 ms half-sine).
It meets ISO7637-2 and ISO16750-2 surge standards across defined test conditions, features low thermal resistance due to DO-218 package construction, and exhibits stable reverse leakage (<10 µA at VWM, <150 µA at TJ = 175 °C), enabling reliable operation in high-temperature engine bay environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 40.0 / 44.2 V - breakdown occurs within this range at 5 mA test current, defining turn-on threshold |
| VC @ IPPM | 58.1 V - clamping voltage at 79 A peak pulse current, limiting downstream voltage stress |
| PPPM (10/1000 µs) | 4600 W - peak transient energy absorption capability for standardized load dump waveform |
| IFSM | 600 A - surge current handling for 8.3 ms half-sine, supporting high-current inductive switch-off events |
| TJ Range | −55 °C to +175 °C - extended junction temperature range suitable for under-hood automotive placement |
| Polarity | Unidirectional - anode connected to heatsink, cathode marked with bar, enabling forward-biased clamping |
Pinout & Package
ALS6W36A uses the DO-218 plastic package with integrated heatsink. The anode is electrically connected to the metal heatsink tab; the cathode is the leaded terminal marked by a bar. This configuration enables direct mounting to PCB copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current entry point during clamping | Electrically tied to case; must be soldered to large copper area for thermal dissipation and low-inductance path |
| Cathode (Leaded Terminal) | Current exit point during clamping | Marked with cathode bar; connects to protected circuit rail (e.g., battery line) to shunt surge to ground/anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| DO-218 thermal design | Low thermal resistance enables 4600 W pulse handling without derating up to 125 °C case temperature |
| ISO7637-2 & ISO16750-2 compliance | Tested to specified load dump waveforms (e.g., Pulse 5a/b), ensuring system-level EMC robustness |
| Lead-free, halogen-free "Green" construction | RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb, meeting automotive environmental requirements |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Suppresses 12 V system load dump transients (>100 V spikes) generated when alternator field coil is de-energized during engine run. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and ground, conducting only during overvoltage events. Use Value: Limits rail voltage to ≤58.1 V at 79 A, protecting downstream MCUs, CAN transceivers, and analog sensors from destructive overstress. | Use Scenario: Shields BCM power inputs from load dump surges induced by high-current loads (e.g., headlamps, HVAC blower) switching off. IC Role / Device Role / Timing Role: Primary transient suppressor on 12 V input rail, activated within nanoseconds of overvoltage onset. Use Value: Withstands 600 A surge current and maintains <10 µA leakage at 36 V, ensuring low quiescent power loss and long-term stability. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Control Unit |
Use Scenario: Protects image sensor and ISP power supplies in front-facing ADAS cameras exposed to vehicle-level transients. IC Role / Device Role / Timing Role: Clamping device on 12 V input stage, coordinated with upstream fuse and downstream LDOs. Use Value: 175 °C max junction temperature and low thermal resistance allow placement near heat-generating components without derating. | Use Scenario: Safeguards EPS motor driver ICs and position sensor interfaces from load dump events during steering column actuation. IC Role / Device Role / Timing Role: High-energy TVS placed at main power entry point, directly bonded to heatsink plane. Use Value: 4600 W peak power rating ensures single-event survivability of worst-case ISO16750-2 Pulse 5b (10 ms exponential), preventing latch-up or gate oxide damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load dump protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Lower PPPM (400 W), SMA package, 58.1 V VC but only 64.8 V VBR min, no AEC-Q101 qualification | Not suitable for automotive under-hood use; limited to industrial or consumer 12 V systems with lower surge severity | Select only if cost sensitivity outweighs automotive reliability and energy handling requirements |
| SMCJ36A | Higher PPPM (1500 W), SMC package, same VWM/VBR range, AEC-Q101 qualified but not ISO7637-2 tested | Lacks documented compliance with automotive load dump standards; requires system-level validation for Pulse 5 | Acceptable for less demanding automotive subsystems where full ISO certification is not mandated |
Compared with SMAJ36A and SMCJ36A, ALS6W36A uniquely combines AEC-Q101 qualification, ISO7637-2/16750-2 compliance, 4600 W pulse rating, and DO-218 thermal performance-making it the only option qualified for primary load dump suppression in critical powertrain and ADAS ECUs.
Availability
ALS6W36A is available at Aetrix Electronics and suitable for automotive ECU protection, body control module hardening, ADAS camera power conditioning, and electric power steering systems requiring stable component supply across production lifecycles.
Supply support for ALS6W36A 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 is part of Diodes' automotive-grade TVS portfolio, engineered specifically for load dump transient suppression in 12 V vehicle electrical systems with emphasis on thermal robustness, surge endurance, and regulatory compliance.
FAQ
What is the maximum clamping voltage of ALS6W36A under standard test conditions?
The maximum clamping voltage (VC) is 58.1 V, measured at 79 A peak pulse current using a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during a load dump event.
How does the DO-218 package improve thermal performance compared to SMA or SMC packages?
The DO-218 package integrates a large metal heatsink tab directly connected to the anode, reducing thermal resistance to ambient by up to 40% versus SMA and enabling sustained 4600 W pulse handling. Its 2.74 g mass and optimized copper interface provide superior heat spreading during repetitive surge events.
Is ALS6W36A suitable for 24 V commercial vehicle applications?
No - ALS6W36A is rated for 36 V standoff and designed for 12 V automotive systems. For 24 V platforms, Diodes offers ALS6W70A (70 V VWM) and ALS6W75A (75 V VWM) variants with matching DO-218 construction, AEC-Q101 qualification, and ISO compliance.
Does ALS6W36A require external series impedance for optimal load dump protection?
No external series impedance is required for basic clamping function, but a fuse or PTC is recommended upstream to prevent catastrophic failure during sustained overvoltage. Layout best practices include minimizing trace inductance between anode and ground plane and placing the device within 2 cm of the protected rail entry point.
ALS6W36A 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 79A
- 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
ALS6W36A FAQ
1.How can I place an order for ALS6W36A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS6W36A 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 ALS6W36A reliable?
The price and inventory of ALS6W36A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS6W36A is usually 5 days.
3.What payment methods are accepted for ALS6W36A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS6W36A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS6W36A?
ALS6W36A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS6W36A 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 ALS6W36A?
For technical support, including ALS6W36A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS6W36A requirements.
6.How does Aetrix verify that ALS6W36A is sourced from the original manufacturer or authorized distributors?
All ALS6W36A 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 ALS6W36A meets industry standards.
7.What is the process for return or replacement of ALS6W36A?
All ALS6W36A units undergo pre-shipment inspection (PSI). If there is an issue with ALS6W36A, 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 ALS6W36A part is unused and in its original packaging.
Return procedure for ALS6W36A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS6W36A Tags
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