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Diodes Incorporated DM5W33A-13
- Part No.:
- DM5W33A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W33A-13.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:5,860
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Product details
Overview
DM5W33A-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 a 33 V reverse standoff voltage (VRWM), 53.3 V clamping voltage (VC) at 68 A peak pulse current (IPP), and 3600 W peak pulse power dissipation (10/1000 µs waveform), operating across –55°C to +175°C.
For engineers reviewing the DM5W33A-13 datasheet, DM5W33A-13 pinout, DM5W33A-13 application, or DM5W33A-13 equivalent, this device delivers high-reliability overvoltage protection in engine control units, body control modules, and infotainment power supplies where ISO16750-2 compliance and low thermal resistance (1.1 °C/W) are critical.
Technical Context
This unidirectional TVS diode uses a planar junction structure in a DO-218 (Type E) package with anode-connected heatsink polarity. Its 36.7–40.6 V breakdown voltage (VBR) is specified at 5 mA test current, ensuring precise triggering during transients while maintaining ≤10 µA reverse leakage at VRWM.
The device sustains 500 A non-repetitive forward surge current (IFSM) under 8.3 ms half-sine wave conditions and derates linearly above +25°C case temperature-5 W average power at TC = +25°C, dropping to zero at +175°C per the published derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; matches 24 V automotive system nominal with margin for ripple and transients. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 5 mA; ensures reliable turn-on without premature conduction. |
| VC @ IPP | 53.3 V @ 68 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress below 55 V absolute maximum ratings. |
| PPK | 3600 W - Peak pulse power handling capability; meets ISO7637-2 Pulse 5a (load dump) energy requirements. |
| RθJC | 1.1 °C/W - Junction-to-case thermal resistance; enables effective heat transfer to PCB copper pour or heatsink for sustained surge duty. |
| TJ Range | –55°C to +175°C - Full automotive temperature operation; qualified per AEC-Q standards for under-hood reliability. |
| IFSM | 500 A - Single half-sine surge rating (8.3 ms); supports high-energy battery disconnection events without failure. |
Pinout & Package
Package: DO-218 (Type E), surface-mount molded plastic housing with matte tin-plated terminals; heatsink tab is electrically connected to the anode. Polarity marked by cathode bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive terminal / thermal path | Electrically tied to anode; must be soldered to large copper area for thermal management and circuit return path. |
| Cathode (Top Marked Pin) | Transient current sink | Connected to protected line (e.g., 24 V rail); conducts surge current to ground/anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 3600 W peak pulse power | Enables single-device protection against ISO16750-2 load dump surges up to 35 V × 100 A without external series impedance. |
| Low RθJC (1.1 °C/W) | Reduces junction temperature rise by >40% vs. comparable DO-214AB packages, extending surge endurance in confined layouts. |
| AEC-Q qualified | Validated for automotive use per JEDEC reliability standards-supports PPAP documentation and long-term field deployment. |
| Halogen- and antimony-free "Green" | Meets EU RoHS 3 (2015/863/EU) and automotive environmental mandates without compromising surge robustness. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Supply |
|---|---|
Use Scenario: Protects 24 V input rails in diesel/gasoline ECUs exposed to alternator load dump transients up to 35 V and 100 A. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and DC-DC converter input. Use Value: Limits voltage to ≤53.3 V during 10/1000 µs surges, preventing damage to 60 V-rated buck controllers and microcontrollers. |
Use Scenario: Shields 12 V/24 V supply feeding isolated CAN transceivers in BCMs subjected to ISO7637-2 Pulse 1 and Pulse 2a. IC Role / Device Role / Timing Role: Primary overvoltage guard on transceiver VCC rail, upstream of local LDO. Use Value: Withstands 500 A IFSM and maintains <10 µA leakage at 33 V, minimizing standby current impact on battery-sensitive systems. |
| Infotainment Head Unit Power Rail | ADAS Camera Module Power Input |
Use Scenario: Safeguards switching power supplies in head units experiencing repeated ignition cycling and jump-start surges. IC Role / Device Role / Timing Role: Fast-response clamping device parallel to input bulk capacitor, rated for 4 pulses/minute duty cycle. Use Value: Delivers 3600 W PPK with <1.1 °C/W thermal resistance, enabling compact layout without forced airflow or additional heatsinking. |
Use Scenario: Protects 12 V input of 77 GHz radar camera modules mounted near engine compartments with ambient temperatures up to +125°C. IC Role / Device Role / Timing Role: High-temperature-stable TVS placed directly at connector entry point before EMI filter. Use Value: Maintains full 33 V VRWM and 53.3 V VC performance across –55°C to +175°C, eliminating derating concerns in under-hood environments. |
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 (400 W), DO-214AC package, RθJC ≈ 50 °C/W | Not suitable for ISO16750-2 load dump; limited to ISO7637-2 Pulse 1/2/3 only | Select when cost sensitivity outweighs surge energy requirements and thermal constraints allow larger footprint. |
| SMCJ33A | 1500 W PPK, DO-214AB package, RθJC ≈ 3.5 °C/W, higher leakage (50 µA @ VRWM) | Acceptable for moderate load dump but fails at extended duration or repeated surges due to thermal saturation | Choose for legacy designs already using SMC package; verify thermal relief and pulse repetition rate compatibility. |
Compared with SMAJ33A and SMCJ33A, DM5W33A-13 provides 2.4× higher peak power and 3.2× lower thermal resistance-enabling single-device compliance with stringent automotive load dump tests without auxiliary cooling or parallel devices.
Availability
DM5W33A-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment systems, and ADAS camera modules requiring stable component supply across automotive production lifecycles.
Supply support for DM5W33A-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 protection, power management, and signal integrity solutions for automotive and industrial markets.
DM5W33A-13 belongs to the DM5WxxA automotive TVS family, engineered specifically to meet ISO16750-2 load dump and ISO7637-2 surge immunity requirements in harsh under-hood environments.
FAQ
What is the maximum clamping voltage of DM5W33A-13 under standard test conditions?
The maximum clamping voltage (VC) is 53.3 V at 68 A peak pulse current using a 10/1000 µs waveform, measured per IEC 61000-4-5 and ISO 16750-2 Annex C test methods. This value is guaranteed across the full operating temperature range and reflects worst-case conduction after thermal stabilization.
Can DM5W33A-13 replace SMAJ33A in existing designs without layout changes?
No-DM5W33A-13 uses the DO-218 (Type E) package with an integrated heatsink tab, while SMAJ33A uses DO-214AC. The DO-218 requires a dedicated thermal pad and different PCB footprint; direct replacement would cause solder joint failure and thermal runaway due to mismatched thermal mass and mounting geometry.
Is DM5W33A-13 qualified for AEC-Q200 stress testing?
Yes-DM5W33A-13 is qualified to AEC-Q200 Rev D for passive components and referenced in Diodes' AEC-Q product definitions. It passes temperature cycling, humidity bias, mechanical shock, and surge life testing per automotive-grade reliability protocols, with full qualification data available upon request.
How does the anode-heatsink configuration affect PCB layout?
The anode is electrically connected to the metal heatsink tab, requiring direct connection to the lowest-impedance ground plane or chassis return. Layout must allocate ≥200 mm² of 2-oz copper under the tab, with ≥4 thermal vias (0.3 mm diameter) to inner ground layers-failure to do so increases clamping voltage by up to 8% and risks thermal failure during repetitive surges.
DM5W33A-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):
- 68A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
DM5W33A-13 FAQ
1.How can I place an order for DM5W33A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W33A-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 DM5W33A-13 reliable?
The price and inventory of DM5W33A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W33A-13 is usually 5 days.
3.What payment methods are accepted for DM5W33A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W33A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W33A-13?
DM5W33A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W33A-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 DM5W33A-13?
For technical support, including DM5W33A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W33A-13 requirements.
6.How does Aetrix verify that DM5W33A-13 is sourced from the original manufacturer or authorized distributors?
All DM5W33A-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 DM5W33A-13 meets industry standards.
7.What is the process for return or replacement of DM5W33A-13?
All DM5W33A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W33A-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 DM5W33A-13 part is unused and in its original packaging.
Return procedure for DM5W33A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W33A-13 Tags
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