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Diodes Incorporated DM5W40A-13
- Part No.:
- DM5W40A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W40A-13.pdf
- Description:
- Transient Voltage Suppressor PP
- Quantity:
- Payment:
- Shipping:
Inventory:5,227
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Product details
Overview
DM5W40A-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 40 V reverse standoff voltage (VRWM), 44.4–49.1 V breakdown voltage (VBR), 64.5 V clamping voltage (VC) at 56 A peak pulse current, and 3600 W peak pulse power dissipation (10/1000 µs waveform). It is qualified to AEC-Q standards and housed in a DO-218 (Type E) package for high-reliability under-hood applications.
For engineers reviewing the DM5W40A-13 datasheet, DM5W40A-13 pinout, DM5W40A-13 application, or DM5W40A-13 equivalent, this device serves as a primary front-end protection component in 12 V/24 V automotive power rails-especially where compliance with ISO16750-2 load dump and ISO7637-2 Pulse 1/2a/3a/3b is required.
Technical Context
This unidirectional TVS diode operates with anode-connected heatsink polarity and exhibits low thermal resistance (RθJC = 1.1 °C/W), enabling efficient heat transfer during high-energy transients. Its clamping performance is specified at 56 A (10/1000 µs), delivering 64.5 V maximum clamping voltage while maintaining <10 µA reverse leakage at VRWM and <250 µA at TJ = +175°C.
The device supports steady-state power dissipation of 5.0 W at TC = +25°C and derates linearly above that temperature, retaining >2800 W peak pulse capability up to TA = +125°C. Its DO-218 package provides robust mechanical stability and UL 94V-0 flammability rating for harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 40 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum system bus voltage margin. |
| VBR (min/max) | 44.4 / 49.1 V - Breakdown occurs within this range at 5 mA test current; defines turn-on threshold consistency. |
| VC @ IPP | 64.5 V @ 56 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPK | 3600 W - Peak pulse power handling capacity; enables survival of ISO16750-2 load dump surges (up to 100 V, 10 ms exponential). |
| IFSM | 500 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-current battery connection events. |
| RθJC | 1.1 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting for sustained 5 W average power dissipation. |
| TJ Range | −55 to +175 °C - Extended junction temperature range certified for under-hood placement without derating penalties. |
Pinout & Package
Package: DO-218 (Type E), surface-mount molded plastic case with matte tin-plated terminals and UL 94V-0 flammability rating. Anode is connected to the heatsink tab; cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current entry point during clamping | Electrically and thermally coupled to PCB copper pour; must be soldered to ≥100 mm² thermal pad for rated power handling. |
| Cathode (Top Marked Pin) | Current exit point during clamping | Connected to protected line (e.g., LIN, CAN, sensor supply); polarity-sensitive installation required. |
Key Features
| Feature | Design Value |
|---|---|
| 3600 W peak pulse power | Enables single-device protection against ISO16750-2 load dump (≥100 V, 10 ms) without parallel staging. |
| AEC-Q qualified reliability | Validated per JEDEC standards for automotive-grade lifetime and thermal cycling endurance in under-hood locations. |
| Low RθJC (1.1 °C/W) | Permits direct thermal coupling to chassis or large copper areas, eliminating need for external heatsinks in most 5 W DC scenarios. |
| Halogen- and antimony-free "Green" construction | Meets EU RoHS 3 (2015/863/EU) and automotive OEM environmental requirements without compromising surge robustness. |
| ISO7637-2 & ISO16750-2 compliance | Guaranteed performance across Pulse 1 (inductive switch-off), Pulse 2a (battery disconnect), Pulse 3a/b (capacitive coupling), and load dump waveforms. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus Protection |
|---|---|
|
Use Scenario: 12 V battery rail feeding microcontroller, CAN transceivers, and analog sensors in engine bay. IC Role / Device Role: Primary bidirectional surge clamp on main power input, placed upstream of DC/DC converter. Use Value: Limits transient overvoltage to ≤64.5 V during load dump, preventing damage to 36 V-rated LDOs and 5 V logic supplies. |
Use Scenario: LIN physical layer interface exposed to vehicle harness noise and ground bounce. IC Role / Device Role: Unidirectional TVS on LIN signal line (VBAT-referenced), protecting transceiver I/O pins. Use Value: Clamps fast-rising pulses (Pulse 3a/b) below 25 V, preserving LIN signal integrity and avoiding false wake-up or reset. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver Gate Drive |
|
Use Scenario: 5 V/3.3 V imaging sensor supply derived from buck converter powered by 12 V battery. IC Role / Device Role: Secondary TVS on regulated output rail, guarding against conducted transients from nearby switching regulators. Use Value: Suppresses sub-100 ns ringing and overshoot from converter switching, reducing image sensor pixel corruption. |
Use Scenario: High-side gate driver IC supply rail in EPS motor control module subjected to inductive kickback. IC Role / Device Role: Local clamping device on gate driver VDD pin, placed adjacent to driver IC. Use Value: Absorbs 500 A surge energy from MOSFET turn-off without latch-up, ensuring uninterrupted steering assist function. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A | Lower PPK (400 W), SMA package, RθJC ≈ 50 °C/W, no AEC-Q qualification | Not suitable for load dump; limited to ISO7637-2 Pulse 3 only | Select only for non-automotive, low-energy consumer applications with ambient temperature <85°C. |
| SMCJ40A-Q | Same DO-218 package, AEC-Q200 qualified, but PPK = 1500 W (not 3600 W) | Cannot withstand full ISO16750-2 load dump; requires parallel devices for equivalent energy handling | Choose when footprint compatibility is critical but system-level surge testing shows lower energy thresholds. |
Compared with SMAJ40A and SMCJ40A-Q, DM5W40A-13 delivers 2.4× higher peak power and 4.5× better thermal resistance-enabling single-device load dump compliance and extended high-temperature operation without thermal derating compromises.
Availability
DM5W40A-13 is available at Aetrix Electronics and suitable for automotive ECU power inputs, body control modules, ADAS camera supplies, and electric power steering systems requiring stable component supply across long production lifecycles.
Supply support for DM5W40A-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.
DM5W40A-13 belongs to Diodes' automotive-grade TVS portfolio engineered specifically for ISO16750-2 load dump and ISO7637-2 surge immunity in under-hood power distribution networks.
FAQ
What is the maximum clamping voltage of DM5W40A-13 at its rated peak pulse current?
The DM5W40A-13 clamps to a maximum of 64.5 V when subjected to a 56 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 device variation per the DS40426 datasheet.
Can DM5W40A-13 be used in bidirectional configurations?
No-DM5W40A-13 is a unidirectional TVS diode with anode-connected heatsink and cathode-marked terminal. Bidirectional protection requires two devices in series opposition or a dedicated bidirectional part such as the DM5W40CA-13 variant.
Is the DO-218 package lead-free and RoHS compliant?
Yes-the DM5W40A-13 uses matte tin-plated terminals and meets EU RoHS 3 (2015/863/EU) requirements, including halogen- and antimony-free "Green" construction with <900 ppm bromine, <900 ppm chlorine, and <1000 ppm antimony compounds.
How does thermal derating affect the 5 W steady-state power rating?
The 5.0 W PM(AV) rating applies only at TC = +25°C. Above that temperature, power must be linearly derated at 45.5 mW/°C (based on RθJC = 1.1 °C/W), reaching zero at TC = +135°C. Full 5 W operation requires adequate PCB copper area and airflow to maintain case temperature ≤25°C.
DM5W40A-13 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 56A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218
DM5W40A-13 FAQ
1.How can I place an order for DM5W40A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W40A-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 DM5W40A-13 reliable?
The price and inventory of DM5W40A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W40A-13 is usually 5 days.
3.What payment methods are accepted for DM5W40A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W40A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W40A-13?
DM5W40A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W40A-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 DM5W40A-13?
For technical support, including DM5W40A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W40A-13 requirements.
6.How does Aetrix verify that DM5W40A-13 is sourced from the original manufacturer or authorized distributors?
All DM5W40A-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 DM5W40A-13 meets industry standards.
7.What is the process for return or replacement of DM5W40A-13?
All DM5W40A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W40A-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 DM5W40A-13 part is unused and in its original packaging.
Return procedure for DM5W40A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W40A-13 Tags
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