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Diodes Incorporated DM8W33A-13
- Part No.:
- DM8W33A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W33A-13.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
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Product details
Overview
DM8W33A-13 from Diodes Incorporated is a unidirectional 6600W 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 33V reverse standoff voltage (VRWM), 53.3V clamping voltage (VC) at 124A peak pulse current (IPP), and operates from −55°C to +175°C - enabling robust protection of power electronics in engine control units and body control modules.
For engineers reviewing the DM8W33A-13 datasheet, DM8W33A-13 pinout, DM8W33A-13 application, or DM8W33A-13 equivalent, this part delivers verified 6600W 10/1000µs surge capability, high-temperature stability up to TJ = +175°C, and compliance with ISO16750-2 Pulse A/B and ISO7637-2 Pulse 1/2a/3a/3b - critical for automotive-grade power rail hardening.
Technical Context
This TVS diode employs an avalanche breakdown structure optimized for fast response (<1 ns) to high-energy transients, with thermal resistance RθJC = 0.9°C/W ensuring effective heat transfer to the heatsink (anode terminal). Its unidirectional polarity and cathode-bar marking align with standard automotive PCB layout conventions.
It is rated for 8W steady-state power dissipation at TC = +25°C and derates linearly above that temperature per Figure 1, supporting continuous operation in under-hood environments. The device meets AEC-Q200 stress test requirements and is qualified to JEDEC standards for high-reliability automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600W (10/1000µs waveform) - handles full automotive load dump surges without failure |
| Reverse Standoff Voltage | 33V - sets minimum operating voltage threshold before clamping engages |
| Clamping Voltage | 53.3V @ 124A IPP - limits downstream voltage to safe levels during surge events |
| Operating Temperature | −55°C to +175°C - supports placement near engines or in battery junction boxes |
| Thermal Resistance | RθJC = 0.9°C/W - enables efficient heat conduction to heatsink-mounted anode |
| Surge Standards | ISO16750-2 Pulse A/B & ISO7637-2 Pulse 1/2a/3a/3b - certified for OEM automotive qualification |
| Package | DO-218 (Type E) - surface-mount, heatsink-compatible outline with 2.74g mass for mechanical stability |
Pinout & Package
Package: DO-218 (Type E), molded plastic UL 94V-0 housing; anode connected to heatsink tab, cathode marked by bar on top surface. Polarity indicator: heatsink = anode; cathode = marked terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current entry point during clamping | Must be soldered to large copper pour or heatsink for thermal management and low-inductance path |
| Cathode (Marked Terminal) | Current exit point during clamping | Connected to protected line (e.g., 12V rail); cathode-bar marking ensures correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Enables single-device protection against worst-case ISO16750-2 load dump (up to 120V, 10ms exponential) |
| TJ = +175°C Capability | Supports direct mounting in high-ambient zones (e.g., alternator proximity) without derating penalties |
| Lead-Free & Halogen-Free | RoHS 3 compliant with <900ppm Br/Cl and <1000ppm Sb - meets global automotive environmental mandates |
| JEDEC-Qualified Reliability | Validated per AEC-Q200 stress tests - suitable for safety-critical power systems requiring long-term field reliability |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) 12V Rail |
|---|---|
Use Scenario: Protects microcontroller supply rails from alternator load dump surges during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage within nanoseconds to prevent damage to LDOs and MCU I/O. Use Value: Withstands 6600W pulses while maintaining clamping voltage ≤53.3V - avoids brownout or latch-up in 3.3V/5V domain logic. |
Use Scenario: Shields CAN transceivers and sensor interfaces from ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (ESD-like coupling). IC Role / Device Role / Timing Role: Fast-acting surge shunt placed upstream of DC-DC converter input stage. Use Value: 124A IPP rating ensures reliable clamping even under repeated 100V/50ms transients - preserves signal integrity across multiple vehicle cycles. |
| Start-Stop System Battery Interface | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards bidirectional 12V/48V hybrid power architecture against regenerative braking-induced voltage spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main battery feed, thermally coupled to chassis ground. Use Value: RθJC = 0.9°C/W allows sustained operation at TC = +125°C - eliminates need for secondary thermal interface materials. |
Use Scenario: Safeguards H-bridge gate drivers and current sense amplifiers from motor flyback energy during emergency shutdown. IC Role / Device Role / Timing Role: High-current TVS placed between motor phase output and ground return path. Use Value: 700A IFSM rating supports single-pulse survival during 8.3ms half-sine fault currents - prevents MOSFET avalanche failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Lower PPK = 400W; DO-214AC package; RθJC ≈ 35°C/W | Limited to low-energy surges (e.g., ESD, minor switching noise); not ISO16750-2 compliant | Select when cost sensitivity outweighs automotive surge margin and thermal performance is non-critical |
| SMCJ33A | PPK = 1500W; DO-214AB package; VC = 53.3V but IPP = 28.3A only | Suitable for infotainment or lighting subsystems; insufficient for engine bay load dump | Choose for non-critical 12V domains where space constraints prohibit DO-218 footprint |
Compared with SMAJ33A and SMCJ33A, DM8W33A-13 provides 4.4× higher peak power and 4.4× lower thermal resistance - making it the only option among the three qualified for under-hood load dump protection per ISO16750-2.
Availability
DM8W33A-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, start-stop battery interfaces, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for DM8W33A-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 sales operations across Asia, Europe, and North America.
DM8W33A-13 belongs to Diodes' automotive-grade TVS portfolio engineered specifically for ISO16750-2 and ISO7637-2 compliance - targeting high-reliability protection of 12V/48V power networks in modern vehicles.
FAQ
What is the maximum clamping voltage of DM8W33A-13 at its rated peak pulse current?
The clamping voltage (VC) is 53.3V measured at 124A peak pulse current (IPP) under 10/1000µs waveform conditions. This value is guaranteed across the full operating temperature range (−55°C to +175°C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Can DM8W33A-13 be used in bidirectional configurations?
No - DM8W33A-13 is unidirectional only, with anode designated as the heatsink tab and cathode marked by a bar. Bidirectional protection requires two devices in series opposition or a dedicated bidirectional TVS such as the DM8W33CA series.
Is DM8W33A-13 qualified for automotive applications?
Yes - it is AEC-Q200 stress-tested and explicitly designed to meet ISO16750-2 (Pulse A/B) and ISO7637-2 (Pulse 1/2a/3a/3b). An automotive-compliant variant (DM8W33AQ-13) is also available with additional PPAP documentation support.
What is the recommended PCB layout for optimal thermal performance?
Mount the anode (heatsink tab) directly to a ≥25 mm² copper pour connected to internal ground plane via ≥4 thermal vias (0.3mm diameter). Use the suggested pad dimensions from Diodes' DO-218 outline: G = 3.30 mm, X = 3.50 mm, Y = 3.00 mm, Y1 = 9.50 mm, Y2 = 15.80 mm.
DM8W33A-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
DM8W33A-13 FAQ
1.How can I place an order for DM8W33A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W33A-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 DM8W33A-13 reliable?
The price and inventory of DM8W33A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W33A-13 is usually 5 days.
3.What payment methods are accepted for DM8W33A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W33A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W33A-13?
DM8W33A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W33A-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 DM8W33A-13?
For technical support, including DM8W33A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W33A-13 requirements.
6.How does Aetrix verify that DM8W33A-13 is sourced from the original manufacturer or authorized distributors?
All DM8W33A-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 DM8W33A-13 meets industry standards.
7.What is the process for return or replacement of DM8W33A-13?
All DM8W33A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W33A-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 DM8W33A-13 part is unused and in its original packaging.
Return procedure for DM8W33A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W33A-13 Tags
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