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Diodes Incorporated DM8W33AQ-13
- Part No.:
- DM8W33AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W33AQ-13.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
DM8W33AQ-13 from Diodes Incorporated is a surface-mount transient voltage suppressor (TVS) diode designed for automotive load-dump and ISO7637-2 surge protection. It features 33 V reverse standoff voltage (VRWM), 53.3 V clamping voltage (VC) at 124 A peak pulse current (Ipp), and 6600 W peak pulse power dissipation (10/1000 µs waveform), operating from –55 °C to +175 °C in DO-218 (Type E) package.
For engineers reviewing the DM8W33AQ-13 datasheet, DM8W33AQ-13 pinout, DM8W33AQ-13 application, or DM8W33AQ-13 equivalent, key selection criteria include ISO16750-2 Pulse A/B compliance, TJ = +175 °C capability, glass-passivated die construction, anode-heatsink polarity, and AEC-Q101 qualification for under-hood automotive electronics.
Technical Context
This unidirectional TVS diode uses a glass-passivated junction to deliver high surge robustness with low clamping ratio (VC/VRWM ≈ 1.62) and stable leakage (<150 µA at VRWM, TJ = +175 °C). Its DO-218 (Type E) package enables direct heatsink mounting via the anode terminal, supporting thermal resistance RθJC = 0.9 °C/W.
The device meets ISO 16750-2 (Pulse A, Pulse B) and ISO 7637-2 (Pulse 1, 2a, 3a, 3b) requirements without external derating up to TC = +125 °C, with power derating linear beyond that per Figure 1. It sustains 700 A non-repetitive forward surge (IFSM, 8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system bus tolerance margin. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 5 mA test current; ensures predictable turn-on threshold. |
| VC @ Ipp | 53.3 V - Clamped voltage at 124 A (10/1000 µs); defines worst-case overvoltage seen by protected ICs. |
| PPK | 6600 W - Peak pulse power handling (10/1000 µs); supports full ISO 16750-2 load-dump energy without failure. |
| RθJC | 0.9 °C/W - Junction-to-case thermal resistance; enables direct heatsink coupling for sustained 8 W average power (PM(AV)). |
| TJ Range | –55 °C to +175 °C - Full automotive temperature operation; validated for under-hood placement near engine control units. |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), anode-connected heatsink tab, cathode marked by bar on top surface. Weight: 2.74 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive DC return path & thermal interface | Must be soldered to copper pour or heatsink; serves as primary thermal conduction path and circuit ground reference point. |
| Cathode (Lead) | Transient current sink | Connected to protected line (e.g., 12 V battery rail); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified & PPAP capable | Validated for automotive production use with change control, traceable lot documentation, and IATF 16949 manufacturing. |
| Glass-passivated die construction | Eliminates wire-bond vulnerability and improves humidity resistance vs. epoxy-coated alternatives. |
| Lead-free, halogen-free, antimony-free | Meets RoHS 3 (2015/863/EU) and automotive green standards (<900 ppm Br/Cl, <1000 ppm Sb). |
| ISO16750-2 & ISO7637-2 compliant | Passes Pulse A/B load-dump and Pulse 1/2a/3a/3b transients without parameter shift or degradation. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Supply |
|---|---|
Use Scenario: 12 V battery rail protection in gasoline/diesel ECUs exposed to alternator load-dump surges up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and upstream DC-DC converter input. Use Value: Limits transient voltage to ≤53.3 V during 6600 W load-dump events, preventing damage to 40 V-rated input MOSFETs and LDOs. |
Use Scenario: Protection of 12 V supply feeding isolated CAN transceivers in BCMs subjected to ISO 7637-2 Pulse 1 (inductive kickback). IC Role / Device Role / Timing Role: Primary surge suppression on VCC rail upstream of CAN bus power conditioning stage. Use Value: Clamps 124 A pulses within 10/1000 µs envelope while maintaining <150 µA leakage at +175 °C, preserving sleep-mode current budget. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Front-facing camera module powered from vehicle battery with exposure to cranking dips and jump-start spikes. IC Role / Device Role / Timing Role: Standoff protection on main 12 V input, coordinated with downstream polyfuse and ceramic filtering. Use Value: Withstands repeated 700 A IFSM surges (8.3 ms half-sine) without bond-wire fusing, ensuring long-term reliability in vibration-prone mounting locations. |
Use Scenario: Protection of H-bridge gate driver supply in EPS systems where motor regeneration induces high-energy transients. IC Role / Device Role / Timing Role: High-power TVS mounted directly to aluminum heatsink adjacent to motor driver IC. Use Value: Achieves 0.9 °C/W thermal resistance enabling 8 W steady-state dissipation-critical for sustained operation during parking assist maneuvers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-Q | Lower PPK (400 W), DO-214AC package, no heatsink tab, RθJC ≈ 50 °C/W | Suitable only for low-energy ISO 7637-2 Pulse 3a/3b; cannot handle load-dump (Pulse A) | Select when space-constrained PCB layout precludes DO-218 mounting and surge energy is limited to <100 mJ. |
| SMCJ33A-Q | PPK = 1500 W, DO-214AB package, no integrated heatsink, RθJC ≈ 15 °C/W | Supports ISO 7637-2 Pulse 1/2a but fails ISO 16750-2 Pulse A due to lower energy rating | Choose for cost-sensitive body electronics where full load-dump immunity is not required. |
Compared with SMAJ33A-Q and SMCJ33A-Q, DM8W33AQ-13 delivers 4.4× and 4.4× higher peak power handling respectively, enabled by its DO-218 anode-tab thermal design-making it the only option among the three qualified for under-hood load-dump protection per ISO 16750-2.
Availability
DM8W33AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for DM8W33AQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
DM8W33AQ-13 belongs to the DM8WxxAQ family of high-power automotive TVS diodes engineered specifically for ISO 16750-2 load-dump and ISO 7637-2 transient immunity in under-hood environments.
FAQ
What is the maximum clamping voltage of DM8W33AQ-13 during a 10/1000 µs surge?
The maximum clamping voltage (VC) is 53.3 V at 124 A peak pulse current under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +175 °C) and reflects worst-case voltage seen by downstream circuitry during surge events.
Is DM8W33AQ-13 compatible with lead-free reflow soldering processes?
Yes-DM8W33AQ-13 features matte tin-plated terminals rated for lead-free reflow per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C. Its DO-218 package is qualified for standard Pb-free reflow profiles including ramp-soak-reflow cycles.
How does the anode-heatsink configuration affect PCB layout?
The anode is the metal tab forming the primary thermal interface; it must be soldered to a large copper area or external heatsink. The cathode lead connects to the protected line. Layout requires ≥3.5 mm pad width (X dimension) and ≥11.0 mm length (X1) per Diodes' recommended footprint to ensure mechanical stability and thermal performance.
Does DM8W33AQ-13 meet AEC-Q101 stress test requirements?
Yes-DM8W33AQ-13 is fully AEC-Q101 qualified, including high-temperature operating life (HTOL), temperature cycling (TC), and surge testing per Appendix A of the standard. It is manufactured in IATF 16949-certified facilities and supports PPAP documentation packages for automotive Tier 1 suppliers.
DM8W33AQ-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 124A
- 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
DM8W33AQ-13 FAQ
1.How can I place an order for DM8W33AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W33AQ-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 DM8W33AQ-13 reliable?
The price and inventory of DM8W33AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W33AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W33AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W33AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W33AQ-13?
DM8W33AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W33AQ-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 DM8W33AQ-13?
For technical support, including DM8W33AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W33AQ-13 requirements.
6.How does Aetrix verify that DM8W33AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W33AQ-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 DM8W33AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W33AQ-13?
All DM8W33AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W33AQ-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 DM8W33AQ-13 part is unused and in its original packaging.
Return procedure for DM8W33AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W33AQ-13 Tags
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