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Diodes Incorporated DM8W12AQ-13
- Part No.:
- DM8W12AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W12AQ-13.pdf
- Description:
- TVS DO-218
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
DM8W12AQ-13 from Diodes Incorporated is a surface-mount transient voltage suppressor (TVS) diode in DO-218 (Type E) package, designed for automotive load dump and ISO7637-2 surge protection. It features 6600W peak pulse power (10/1000µs), 12V reverse standoff voltage (VRWM), 13.3V minimum breakdown voltage (VBR), 19.9V max clamping voltage at 345A IPP, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the DM8W12AQ-13 datasheet, DM8W12AQ-13 pinout, DM8W12AQ-13 application, or DM8W12AQ-13 equivalent, key selection criteria include clamping voltage margin vs. system rail, thermal resistance (RθJC = 0.9°C/W), junction temperature rating (TJ = –55°C to +175°C), and compliance with ISO16750-2 load dump and ISO7637-2 Pulse 1/2a/3a/3b waveforms.
Technical Context
This TVS diode operates as a unidirectional, anode-heatsink configured device optimized for high-energy transients in 12V automotive electrical systems. Its glass-passivated die construction ensures stable leakage (<15µA @ VRWM) and robust clamping performance across –55°C to +175°C operating range.
The device uses a low-thermal-resistance DO-218 package enabling efficient heat transfer from junction to heatsink (anode terminal). It delivers 6600W peak power handling at TA = +25°C, derating linearly above that temperature per Fig. 1, and supports 700A non-repetitive forward surge current (IFSM) per 8.3ms half-sine waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000µs) | 6600W - sustains ISO16750-2 load dump surges without failure |
| Reverse Standoff Voltage (VRWM) | 12V - blocks normal 12V battery rail operation while remaining inactive |
| Breakdown Voltage (VBR min) | 13.3V @ 5mA - triggers conduction just above nominal system voltage |
| Clamping Voltage (VC max) | 19.9V @ 345A - limits downstream IC voltage stress during worst-case surge |
| Junction Temperature Range | –55°C to +175°C - qualified for engine compartment mounting locations |
| Thermal Resistance (RθJC) | 0.9°C/W - enables effective heatsink-coupled thermal management |
| AEC-Q101 Qualified | Yes - meets stress test requirements for automotive reliability |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), 2.74g weight, lead-free matte tin plating, polarity marked with bar (cathode) and circle (anode); heatsink tab is anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive Surge Return Path | Primary thermal interface and low-inductance current return path for high di/dt events |
| Cathode (Top Lead) | Transient Current Sink | Connected to protected line; conducts surge current to anode/heatsink during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Handles full ISO16750-2 load dump energy (≥100V, 10ms exponential) without degradation |
| Glass-Passivated Die | Ensures stable VBR and low leakage (<15µA @ 12V) over lifetime and temperature |
| TJ = +175°C Rating | Supports direct mounting on hot chassis or ECUs near powertrain components |
| DO-218 Mechanical Robustness | Withstands board flexure and thermal cycling in automotive PCB assemblies |
| AEC-Q101 & PPAP Capable | Meets automotive qualification requirements for production release and supply chain traceability |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Line |
|---|---|
Use Scenario: Protects 12V input rail of engine control units against alternator load dump spikes up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage before it reaches DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to ≤19.9V, preserving 24V-tolerant input stages and avoiding brownout resets. | Use Scenario: Shields low-voltage CAN transceivers (e.g., TJA1042) from coupled surges on vehicle battery lines. IC Role / Device Role / Timing Role: Front-end surge limiter placed upstream of common-mode chokes and bus termination networks. Use Value: Prevents latch-up or permanent damage to CAN PHYs during ISO7637-2 Pulse 2a (inductive switch-off) events. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards 12V input to image sensor modules mounted near engine bay, exposed to repeated load dump cycles. IC Role / Device Role / Timing Role: Primary overvoltage clamp on fused power feed, placed adjacent to connector entry point. Use Value: Maintains <1µA leakage at 12V and stable clamping after 1000+ surge events per AEC-Q101 stress testing. | Use Scenario: Protects gate drivers and current sense amplifiers in EPS motor control boards from battery reversal and load dump. IC Role / Device Role / Timing Role: High-power TVS integrated into heatsink-mounted power stage layout with low-inductance anode tie. Use Value: Absorbs 700A IFSM surges without bond wire lift, validated per JESD22-A112 vibration and thermal shock tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Lower peak power (400W), SMA package, RθJC ≈ 50°C/W, no AEC-Q101 qualification | Suitable only for non-automotive, low-energy surges; cannot replace DM8W12AQ-13 in load dump scenarios | Select only for cost-sensitive consumer-grade 12V inputs where ISO16750-2 compliance is not required |
| SMCJ12A | Higher peak power (1500W), SMC package, RθJC ≈ 12°C/W, AEC-Q101 optional (not standard) | Acceptable for ISO7637-2 Pulse 1/3 but insufficient for full load dump; limited thermal capacity vs. DO-218 | Consider only if board space allows larger SMC footprint and thermal design accommodates higher RθJC |
Compared with SMAJ12A and SMCJ12A, DM8W12AQ-13 delivers 4.4× and 4.4× higher peak power respectively, 55× and 13× lower thermal resistance, and factory-certified AEC-Q101 qualification-making it the sole choice for production automotive load dump protection.
Availability
DM8W12AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for DM8W12AQ-13 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, headquartered in Plano, Texas, with design, manufacturing, and distribution operations across Asia, Europe, and North America.
The DM8WxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for high-energy load dump and ISO7637-2 surge immunity in 12V vehicle electrical architectures.
FAQ
What is the maximum clamping voltage of DM8W12AQ-13 at rated peak pulse current?
The maximum clamping voltage (VC) is 19.9V at 345A peak pulse current (Ipp) under 10/1000µs waveform conditions. This value is measured per JEDEC standards and guarantees voltage limiting below 20V during worst-case surge events, protecting downstream 24V-rated components on the same rail.
Is DM8W12AQ-13 bidirectional or unidirectional?
DM8W12AQ-13 is a unidirectional TVS diode. Its polarity marking shows a bar indicating cathode and a circle indicating anode, with the heatsink tab serving as the anode terminal. It protects against positive-going transients on a grounded-line configuration and must be oriented accordingly in circuit layout.
Can DM8W12AQ-13 be used in 24V automotive systems?
No-DM8W12AQ-13 is specified for 12V nominal systems only. Its 12V VRWM and 13.3V VBR min are incompatible with 24V battery rails, where leakage would exceed specification and clamping may activate during normal operation. For 24V systems, use DM8W26AQ-13 (26V VRWM) or DM8W28AQ-13 (28V VRWM).
Does DM8W12AQ-13 require a heatsink to meet its 6600W rating?
Yes-the 6600W peak pulse power rating assumes terminals are maintained at ambient temperature, and the anode (heatsink tab) must be thermally connected to a sufficient copper area or external heatsink. Without heatsinking, power dissipation capability drops significantly due to junction-to-case thermal resistance (RθJC = 0.9°C/W) and self-heating effects.
DM8W12AQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-218AB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 332A
- 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
DM8W12AQ-13 FAQ
1.How can I place an order for DM8W12AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W12AQ-13 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 DM8W12AQ-13 reliable?
The price and inventory of DM8W12AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W12AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W12AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W12AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W12AQ-13?
DM8W12AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W12AQ-13 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 DM8W12AQ-13?
For technical support, including DM8W12AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W12AQ-13 requirements.
6.How does Aetrix verify that DM8W12AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W12AQ-13 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 DM8W12AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W12AQ-13?
All DM8W12AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W12AQ-13, 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 DM8W12AQ-13 part is unused and in its original packaging.
Return procedure for DM8W12AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W12AQ-13 Tags
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