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Diodes Incorporated ALS6W15A
- Part No.:
- ALS6W15A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS6W15A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:5,822
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Product details
Overview
ALS6W15A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, rated for 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown (VBR), 4600 W peak pulse power (10/1000 µs), and 189 A peak pulse current, designed specifically for automotive ECU load dump protection where high-temperature stability and low clamping voltage (24.4 V) are critical.
For engineers reviewing the ALS6W15A datasheet, ALS6W15A pinout, ALS6W15A application, or ALS6W15A equivalent, key selection criteria include its 175 °C junction temperature rating, AEC-Q101 qualification, ISO7637-2/ISO16750-2 compliance, unidirectional polarity with heatsink-anode configuration, and 2.74 g mechanical weight under DO-218 outline constraints.
Technical Context
The ALS6W15A operates as a clamping diode in automotive power rail protection, conducting only during reverse overvoltage transients while maintaining low leakage (<10 µA at VWM) up to 175 °C. Its thermal design leverages the DO-218 package's low thermal resistance and heatsink-anode construction to sustain 4600 W surge dissipation at case temperatures up to 125 °C before derating.
It meets ISO7637-2 Pulse 5a/b and ISO16750-2 load dump test profiles using exponential waveforms (10 ms), with clamping performance validated at 24.4 V @ 189 A (10/1000 µs) and 3600 W capability under 10/10,000 µs conditions - enabling robust protection of downstream 12 V automotive electronics without crowbar action.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before conduction begins; defines system nominal rail compatibility. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown voltage range at 5 mA test current; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 24.4 V - Clamping voltage at 189 A peak pulse; limits protected circuit voltage stress during load dump events. |
| PPPM (10/1000 µs) | 4600 W - Peak pulse power handling; supports worst-case ISO7637-2 Pulse 5a energy absorption. |
| TJ Range | −55 °C to +175 °C - Operating junction temperature range; enables placement near hot ECU components. |
| IFSM | 600 A - Non-repetitive forward surge rating (8.3 ms half-sine); accommodates inrush and fault currents. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct PCB layout for thermal and electrical grounding. |
Pinout & Package
Package: DO-218 plastic outline with heatsink-anode terminal configuration; matte tin-plated terminals compliant with MIL-STD-750 Method 2026 and JESD22-B102; UL94-V0 molding compound; 2.74 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Power return path and thermal interface | Must be soldered to large copper pour or heatsink for thermal management; electrically tied to system ground in most automotive configurations. |
| Cathode (Bar-marked lead) | Transient voltage clamp output | Connected to protected 12 V rail; conducts surge current to anode during overvoltage events; polarity-sensitive installation required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use across −55 °C to +175 °C with lifetime reliability testing per stress conditions. |
| ISO7637-2 & ISO16750-2 compliance | Passes Load Dump Pulse 5a (10 ms exponential) and Pulse 5b (damped oscillation) without degradation or failure. |
| Low clamping voltage (24.4 V) | Minimizes overvoltage stress on downstream DC-DC converters, microcontrollers, and CAN transceivers in 12 V systems. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; supports standard SMT reflow without baking prior to assembly. |
| Halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; suitable for global automotive supply chains. |
Applications
| Engine Control Unit Protection | Body Control Module Protection |
|---|---|
Use Scenario: Protecting 12 V power inputs of engine ECUs exposed to alternator load dump transients during battery disconnect. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and input filter capacitor, turning on within nanoseconds to shunt surge energy to ground. Use Value: Limits rail voltage to 24.4 V during 4600 W surges, preventing damage to 3.3 V/5 V LDOs and 16-bit MCUs without requiring active shutdown. | Use Scenario: Safeguarding BCM power supplies against load dump when high-current loads (e.g., headlamps, HVAC fans) switch off abruptly. IC Role / Device Role / Timing Role: Primary transient suppressor mounted directly at BCM power entry point, leveraging DO-218 thermal mass to absorb repetitive 10 ms surges. Use Value: Maintains <10 µA leakage at 15 V up to 175 °C, ensuring low quiescent current in always-on vehicle modules. |
| ADAS Camera Power Input | Infotainment Head Unit Protection |
Use Scenario: Securing 12 V input of rear-view or surround-view camera modules integrated into vehicle exterior mirrors or bumpers. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing fast-rising transients induced by nearby solenoid actuation or relay switching. Use Value: Achieves 24.4 V clamping at 189 A with <1 ns response time, preserving image sensor functionality during ignition and accessory cycling. | Use Scenario: Shielding infotainment head unit power rails from load dump events generated by seat motor or window lift ECU faults. IC Role / Device Role / Timing Role: High-energy TVS placed upstream of buck converter input, absorbing multi-kilowatt pulses without thermal runaway. Use Value: Supports PPAP documentation and traceable sourcing for Tier-1 OEM programs requiring full component lifecycle control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load dump protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Lower PPPM (400 W), SMA package, 200 °C TJ max, 23.2 V VC @ 17.3 A | Not suitable for ISO7637-2 Pulse 5; limited to low-energy spikes in non-automotive industrial use | Select only for cost-sensitive 12 V systems with <500 W surge exposure and no AEC-Q101 requirement. |
| SMCJ15A | PPPM = 1500 W, SMC package, 175 °C TJ, 24.4 V VC @ 61.5 A | Meets basic ISO16750-2 but lacks full ISO7637-2 Pulse 5a validation and MSL Level 1 reflow rating | Acceptable for legacy automotive designs where 4600 W headroom is not mandated and board space allows larger SMC footprint. |
Compared with SMAJ15A and SMCJ15A, ALS6W15A delivers 3× higher surge power handling, certified AEC-Q101 reliability, and DO-218 thermal performance essential for modern automotive load dump compliance - making it the only option among the three qualified for PPAP-critical ECU front-end protection.
Availability
ALS6W15A is available at Aetrix Electronics and suitable for automotive ECU protection, body control module hardening, ADAS camera power conditioning, and infotainment head unit surge suppression requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for ALS6W15A 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, serving automotive, industrial, computing, and consumer markets with a focus on high-reliability, AEC-Q101-qualified components.
The ALS6W series belongs to Diodes' automotive-grade transient voltage suppressor product line, engineered specifically to meet ISO7637-2 load dump requirements in engine bay and chassis-mounted electronic control units.
FAQ
What is the maximum clamping voltage of ALS6W15A under load dump conditions?
The ALS6W15A clamps to 24.4 V at its rated peak pulse current of 189 A (10/1000 µs waveform). Under ISO7637-2 Pulse 5a (10 ms exponential), clamping remains below 28 V at 150 A, verified per Diodes' load dump power curves (Fig.2). This value is measured at TC = 25 °C and derates linearly with increasing case temperature.
Can ALS6W15A be used in bidirectional configurations?
No - ALS6W15A is strictly unidirectional, with anode designated as the heatsink terminal and cathode marked by a bar. Bidirectional operation would require two devices in series opposition or a dedicated bidirectional TVS like the D28V0L4P5, which has different VWM, VC, and thermal characteristics unsuitable for direct substitution.
Is the DO-218 package compatible with standard SMT reflow profiles?
Yes - ALS6W15A is rated MSL Level 1 per J-STD-020 and withstands peak reflow temperatures up to 260 °C for 10 seconds. Its matte tin terminations comply with J-STD-002 and JESD22-B102, supporting standard lead-free reflow profiles without pre-baking, provided board thermal mass and dwell time remain within IPC-J-STD-020 Class 3 limits.
How does ALS6W15A differ from standard TVS diodes like P6KE15A?
ALS6W15A offers 11.5× higher peak pulse power (4600 W vs. 600 W), AEC-Q101 qualification, ISO7637-2 Pulse 5 validation, DO-218 thermal packaging, and 175 °C junction rating - whereas P6KE15A is a general-purpose axial-leaded TVS rated only to 150 °C, lacking automotive certification, surge waveform validation, or SMT compatibility.
ALS6W15A 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 189A
- 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
ALS6W15A FAQ
1.How can I place an order for ALS6W15A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS6W15A 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 ALS6W15A reliable?
The price and inventory of ALS6W15A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS6W15A is usually 5 days.
3.What payment methods are accepted for ALS6W15A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS6W15A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS6W15A?
ALS6W15A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS6W15A 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 ALS6W15A?
For technical support, including ALS6W15A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS6W15A requirements.
6.How does Aetrix verify that ALS6W15A is sourced from the original manufacturer or authorized distributors?
All ALS6W15A 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 ALS6W15A meets industry standards.
7.What is the process for return or replacement of ALS6W15A?
All ALS6W15A units undergo pre-shipment inspection (PSI). If there is an issue with ALS6W15A, 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 ALS6W15A part is unused and in its original packaging.
Return procedure for ALS6W15A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS6W15A Tags
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