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Diodes Incorporated ALS6W30A
- Part No.:
- ALS6W30A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS6W30A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:9,206
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Product details
Overview
ALS6W30A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor diode in DO-218 package, rated for 30 V standoff voltage (VWM), 33.3–36.8 V breakdown (VBR), 4600 W peak pulse power (10/1000 µs), and 600 A forward surge current-designed specifically for automotive ECU load dump protection per ISO7637-2 and ISO16750-2.
For engineers reviewing the ALS6W30A datasheet, ALS6W30A pinout, ALS6W30A application, or ALS6W30A equivalent, key selection criteria include clamping voltage (48.4 V at 95 A), thermal stability up to +175 °C junction temperature, low forward voltage drop (≤1.9 V at 100 A), AEC-Q101 qualification, and DO-218 mechanical compatibility with high-power automotive PCB layouts.
Technical Context
The ALS6W30A operates as a unidirectional clamping diode with anode-connected heatsink configuration, enabling direct mounting to metal chassis or thermal pads for low-thermal-resistance dissipation of 10 ms exponential load dump transients. Its junction design sustains 175 °C continuous operation and delivers stable reverse leakage (<10 µA at VWM) across automotive temperature ranges.
It meets ISO7637-2 Pulse 5a/b and ISO16750-2 load dump test profiles under defined test conditions, with clamping performance validated at 95 A peak pulse current yielding 48.4 V maximum clamping voltage-critical for protecting downstream 3.3 V/5 V/12 V logic and power ICs in engine control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold. |
| VBR (min/max) | 33.3 V / 36.8 V - Verified breakdown range at 5 mA test current; ensures consistent turn-on behavior across production lots. |
| PPPM (10/1000 µs) | 4600 W - Peak transient power handling capability; supports worst-case 12 V automotive load dump surges. |
| IFSM | 600 A - 8.3 ms half-sine surge rating; enables robust protection against alternator-induced inrush events. |
| VC @ IPPM | 48.4 V - Clamping voltage at 95 A pulse; limits voltage seen by protected ICs to safe levels during transients. |
| TJ Range | −55 °C to +175 °C - Full automotive-grade junction temperature range; guarantees reliability in under-hood environments. |
| Leakage @ VWM | ≤10 µA - Low reverse leakage at 30 V; minimizes standby power loss and avoids false triggering. |
Pinout & Package
DO-218 plastic package with integral heatsink terminal (anode) and cathode bar marking; designed for surface-mount reflow soldering at 260 °C/10 s; polarity confirmed: heatsink = anode, marked cathode bar = cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Heatsink tab | Anode | Primary current-carrying and thermal path; must be soldered to copper pour or chassis for effective heat dissipation. |
| Cathode bar (marked end) | Cathode | Reverse-biased connection point; connects to protected circuit's positive rail to clamp overvoltage to ground. |
Key Features
| Feature | Design Value |
|---|---|
| ISO7637-2 & ISO16750-2 compliance | Validated for automotive load dump immunity testing-enables direct integration into ECU front-end protection without additional filtering. |
| AEC-Q101 qualification | Qualified for automotive electronics per stress test requirements including HTGB, HTRB, and TCT-ensures long-term reliability in harsh environments. |
| Low thermal resistance | Optimized DO-218 thermal path reduces junction-to-case ΔT during 4600 W pulses-delays thermal runaway and extends device lifetime. |
| Lead-free & halogen-free "Green" construction | RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb-meets global automotive environmental mandates and end-of-life recycling requirements. |
| High surge current capability | 600 A IFSM rating supports repeated alternator switching events without degradation-critical for start-stop system durability. |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protects microcontroller, CAN transceiver, and sensor interface ICs in gasoline/diesel engine ECUs from alternator load dump transients during battery disconnect. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and local DC/DC input, conducting only during overvoltage events to shunt energy to chassis ground. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or permanent damage to 5 V/3.3 V logic rails while maintaining system uptime. | Use Scenario: Shields BCM power management ICs and LIN transceivers from voltage spikes induced by high-current loads (e.g., door locks, lighting relays) switching on shared vehicle battery lines. IC Role / Device Role / Timing Role: Front-end transient suppressor on 12 V input, activated within nanoseconds to clamp surges before they propagate through LDOs or buck converters. Use Value: Enables reliable operation at ambient temperatures up to +125 °C under hood, with <10 µA leakage preserving low-power sleep mode integrity. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Control Unit |
Use Scenario: Safeguards image sensor, ISP, and serializer ICs in rear-view or surround-view cameras exposed to load dump during vehicle jump-start or battery replacement. IC Role / Device Role / Timing Role: High-speed clamping element mounted adjacent to camera module's DC/DC input, leveraging DO-218 thermal mass to absorb 10 ms exponential transients. Use Value: Maintains ≤48.4 V clamping under 95 A peak current-prevents pixel corruption or frame loss during transient events critical for functional safety compliance. | Use Scenario: Protects motor gate drivers, position sensors, and MCU power supplies in EPS systems where rapid motor current changes induce high dI/dt coupling onto supply rails. IC Role / Device Role / Timing Role: Primary overvoltage suppression device on main 12 V input, coordinated with TVS arrays and ferrite beads to meet ASIL-B EMC requirements. Use Value: Delivers 4600 W pulse handling with ≤1.9 V forward drop at 100 A-reducing conduction loss and thermal stress during sustained assist maneuvers. |
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 |
|---|---|---|---|
| SMAJ30A (onsemi) | Lower PPPM (400 W), SMA package, 45.7 V clamping at 8.3 A | Not suitable for full ISO7637-2 Pulse 5; limited to low-energy transients in non-critical modules | Select only for cost-sensitive non-automotive or auxiliary circuits where 4600 W capability is unnecessary. |
| SMCJ30A (Littelfuse) | 4000 W PPPM, DO-214AB package, 48.4 V clamping at 83.3 A | Lacks AEC-Q101 qualification and 175 °C rating; not approved for under-hood deployment | Acceptable for industrial control panels but requires requalification for automotive use. |
Compared with SMAJ30A and SMCJ30A, ALS6W30A uniquely combines AEC-Q101 qualification, 4600 W pulse rating, 175 °C operation, and DO-218 thermal performance-making it the only drop-in solution for production automotive load dump protection meeting OEM Tier-1 requirements.
Availability
ALS6W30A is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering units requiring stable component supply across multi-year automotive production cycles.
Supply support for ALS6W30A 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, computing, and consumer markets.
The ALS6WxxA series belongs to Diodes' automotive-grade transient voltage suppressor product line, engineered specifically to replace legacy TVS diodes in high-energy load dump protection applications with enhanced thermal robustness and AEC-Q101 compliance.
FAQ
What is the maximum clamping voltage of ALS6W30A under standard test conditions?
The ALS6W30A exhibits a maximum clamping voltage (VC) of 48.4 V when subjected to a 95 A peak pulse current with a 10/1000 µs waveform, as specified in the manufacturer's electrical characteristics table. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events.
Does ALS6W30A require external heat sinking beyond its DO-218 package?
No external heat sink is required for transient suppression duty, as the DO-218 package integrates a thermally optimized heatsink tab that serves as the anode terminal. Effective thermal performance depends on soldering the tab to ≥100 mm² of 2 oz copper pour; no bolted or clipped add-on heatsinks are needed for ISO7637-2 compliance.
How does ALS6W30A differ from bidirectional TVS diodes in automotive applications?
ALS6W30A is unidirectional and functions only during positive overvoltage events on the battery rail, offering lower leakage (<10 µA) and higher surge current (600 A) than bidirectional equivalents. Bidirectional devices conduct on both polarities, increasing standby power loss and reducing surge margin-making ALS6W30A preferred for 12 V automotive power line protection where polarity is fixed.
Is ALS6W30A compatible with lead-free reflow soldering processes?
Yes-ALS6W30A is qualified for lead-free reflow per J-STD-020, supporting peak temperatures up to 260 °C for 10 seconds. Its matte tin-plated terminals comply with MIL-STD-750 Method 2026 and JESD22-B102, ensuring reliable wetting and intermetallic formation without voiding or dewetting in standard SMT assembly lines.
ALS6W30A 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 95A
- 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
ALS6W30A FAQ
1.How can I place an order for ALS6W30A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS6W30A 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 ALS6W30A reliable?
The price and inventory of ALS6W30A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS6W30A is usually 5 days.
3.What payment methods are accepted for ALS6W30A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS6W30A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS6W30A?
ALS6W30A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS6W30A 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 ALS6W30A?
For technical support, including ALS6W30A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS6W30A requirements.
6.How does Aetrix verify that ALS6W30A is sourced from the original manufacturer or authorized distributors?
All ALS6W30A 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 ALS6W30A meets industry standards.
7.What is the process for return or replacement of ALS6W30A?
All ALS6W30A units undergo pre-shipment inspection (PSI). If there is an issue with ALS6W30A, 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 ALS6W30A part is unused and in its original packaging.
Return procedure for ALS6W30A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS6W30A Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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