My Inquiry
My Account
Diodes Incorporated ALS8W13A
- Part No.:
- ALS8W13A
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
ALS8W13A.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:4,238
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ALS8W13A from Diodes Incorporated is a unidirectional surface-mount load dump transient voltage suppressor in DO-218 package, rated for 13.0 V stand-off voltage (VWM), 14.4–15.9 V breakdown (VBR), 6600 W peak pulse power (10/1000 μs), and 307 A peak pulse current, designed for automotive ECU protection against ISO 7637-2 load dump transients.
For engineers reviewing the ALS8W13A datasheet, ALS8W13A pinout, ALS8W13A application, or ALS8W13A equivalent, key selection criteria include clamping voltage (21.5 V at IPPM), thermal stability up to +175°C junction temperature, low forward voltage (≤1.8 V @ 100 A), and compliance with AEC-Q101 for automotive-grade reliability.
Technical Context
This TVS diode operates as a unidirectional clamping device with anode-connected heatsink polarity, optimized for high-energy, short-duration load dump surges in 12 V automotive systems. Its DO-218 package delivers low thermal resistance and supports 700 A forward surge capability (8.3 ms half-sine).
It meets ISO 7637-2 and ISO 16750-2 test requirements under defined conditions, with clamping performance validated across temperature (−55°C to +175°C) and pulse width (10 ms exponential waveform). Reverse leakage remains ≤10 μA at VWM and ≤150 μA at +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 14.4 V / 15.9 V - Breakdown threshold range at 5 mA test current, defining turn-on consistency |
| VC @ IPPM | 21.5 V - Clamping voltage at 307 A peak pulse, limiting downstream voltage stress |
| PPPM (10/1000 μs) | 6600 W - Peak surge power handling for standard load dump waveform |
| IFSM | 700 A - Non-repetitive forward surge rating (8.3 ms half-sine), supporting high-current switching events |
| TJ Range | −55°C to +175°C - Extended junction temperature range enabling under-hood deployment |
| VF @ 100 A | ≤1.8 V - Low forward voltage drop minimizes conduction loss during surge conduction |
Pinout & Package
Package: DO-218 - Surface-mount plastic case with integral heatsink tab (anode terminal), UL 94V-0 rated, 2.74 g mass, 13.5 mm length, and 3.96 mm width. Polarity marked by cathode bar; heatsink is electrically connected to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Main current path input / thermal interface | Electrically active anode terminal; must be soldered to PCB copper pour for thermal dissipation and electrical connection |
| Cathode (Top Lead) | Clamped output / surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified, manufactured in IATF 16949 certified facilities for production automotive use |
| High-temperature stability | Guaranteed operation up to +175°C junction temperature with ≤150 μA leakage at max TJ |
| Low thermal resistance | DO-218 package enables efficient heat transfer from junction to PCB via anode tab |
| ISO-compliant surge handling | Validated per ISO 7637-2 and ISO 16750-2 load dump waveforms under specified test conditions |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb), RoHS 3 compliant |
Applications
| Engine Control Unit Protection | Body Control Module Protection |
|---|---|
Use Scenario: Protects microcontroller power rails and CAN transceivers in engine bay ECUs exposed to alternator load dump transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and protected IC inputs. Use Value: Limits transient voltage to 21.5 V at 307 A, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Shields LIN bus drivers and power switches in door modules and lighting controllers during battery disconnection events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply input prior to DC-DC converter input stage. Use Value: Withstands 6600 W surge energy while maintaining ≤1.8 V forward drop during high-current conduction, reducing system power loss. |
| ADAS Camera Power Input | Electric Power Steering ECU |
Use Scenario: Safeguards image sensor and serializer ICs in front-facing cameras subjected to repeated load dump pulses in stop-start cycles. IC Role / Device Role / Timing Role: Fast-response clamping element on 12 V camera module input, placed upstream of LDO regulators. Use Value: 14.4–15.9 V VBR ensures reliable turn-on before sensitive analog front-end components exceed absolute maximum ratings. | Use Scenario: Protects motor driver gate drivers and position sensor interfaces in EPS control units experiencing high-current inductive kickback. IC Role / Device Role / Timing Role: Bidirectional surge suppression not required; unidirectional clamping suffices due to grounded anode configuration. Use Value: DO-218 mechanical robustness and 700 A IFSM rating support repeated surge events without degradation in steering assist reliability. |
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 | Lower PPPM (400 W), SMA package, 200 A IPPM, 21.5 V VC | Not suitable for full ISO 7637-2 load dump; limited to lower-energy transients | Select only for non-automotive or low-risk 12 V subsystems where surge energy is constrained |
| SMCJ13A | Higher PPPM (1500 W), SMC package, 300 A IPPM, 21.5 V VC | Lacks AEC-Q101 qualification and extended +175°C operation; not automotive-qualified | Acceptable for industrial 12 V systems but requires requalification for automotive production |
Compared with SMAJ13A and SMCJ13A, ALS8W13A uniquely combines 6600 W surge capacity, AEC-Q101 certification, and +175°C operation in a thermally optimized DO-218 package-making it the only direct solution for production automotive load dump protection without derating or parallel staging.
Availability
ALS8W13A is available at Aetrix Electronics and suitable for automotive ECU protection, body control modules, ADAS camera power inputs, and electric power steering systems requiring stable component supply and long-term automotive lifecycle support.
Supply support for ALS8W13A 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 ALS8WxxA series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for robust load dump suppression in 12 V vehicle electrical systems per ISO standards.
FAQ
What is the polarity configuration of ALS8W13A?
ALS8W13A is a unidirectional TVS diode with the heatsink tab serving as the anode terminal and the top lead as the cathode. The cathode is marked by a visible bar on the package body. This configuration allows it to clamp positive transients on a grounded-cathode layout, typical for battery rail protection in automotive systems.
Does ALS8W13A require external heat sinking beyond PCB copper?
No additional heat sink is required. The DO-218 package integrates the anode directly into a large metal tab designed for soldering to a minimum 100 mm² copper pour on the PCB. This provides sufficient thermal dissipation for 6600 W single-pulse events and maintains junction temperature within −55°C to +175°C limits under defined test conditions.
How does ALS8W13A differ from standard SMA/SMC TVS diodes in automotive use?
Unlike generic SMA/SMC TVS devices, ALS8W13A is AEC-Q101 qualified, rated for +175°C operation, and validated per ISO 7637-2 load dump waveforms. Its DO-218 package offers lower thermal resistance and higher surge current capability (307 A IPPM vs. ≤300 A for SMCJ), making it suitable for Tier-1 automotive production without design margin compromise.
Can ALS8W13A be used in 24 V commercial vehicle systems?
No - ALS8W13A is specified for 13.0 V stand-off and optimized for 12 V automotive systems. For 24 V applications, Diodes recommends ALS8W26A (26.0 V VWM) or ALS8W30A (30.0 V VWM), which maintain identical DO-218 packaging, thermal performance, and AEC-Q101 qualification while matching higher nominal battery voltages.
ALS8W13A 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):
- 307A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
ALS8W13A FAQ
1.How can I place an order for ALS8W13A through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS8W13A 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 ALS8W13A reliable?
The price and inventory of ALS8W13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS8W13A is usually 5 days.
3.What payment methods are accepted for ALS8W13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS8W13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS8W13A?
ALS8W13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS8W13A 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 ALS8W13A?
For technical support, including ALS8W13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS8W13A requirements.
6.How does Aetrix verify that ALS8W13A is sourced from the original manufacturer or authorized distributors?
All ALS8W13A 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 ALS8W13A meets industry standards.
7.What is the process for return or replacement of ALS8W13A?
All ALS8W13A units undergo pre-shipment inspection (PSI). If there is an issue with ALS8W13A, 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 ALS8W13A part is unused and in its original packaging.
Return procedure for ALS8W13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ALS8W13A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
