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Diodes Incorporated DM5W18AQ-13
- Part No.:
- DM5W18AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W18AQ-13.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:998
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Product details
Overview
DM5W18AQ-13 from Diodes Incorporated is a 3600W 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 18V reverse standoff voltage (VRWM), 29.2V max clamping voltage at 123A peak pulse current (10/1000µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the DM5W18AQ-13 datasheet, DM5W18AQ-13 pinout, DM5W18AQ-13 application, or DM5W18AQ-13 equivalent, this device serves as a high-power unidirectional TVS for 12V/24V automotive power rail protection where low clamping voltage, high IFSM (500A), and thermal robustness (RθJC = 1.1°C/W) are critical selection criteria.
Technical Context
This unidirectional TVS operates with anode-connected heatsink polarity and is optimized for fast transient suppression in automotive electrical systems. Its breakdown voltage (VBR) is specified at 20.0–22.1V with 5mA test current, and it maintains ≤10µA reverse leakage at VRWM up to +175°C junction temperature.
The device delivers 3600W peak pulse power (10/1000µs) and sustains 5W average power at TC = +25°C, with derating to ~2800W at elevated case temperatures. Its thermal resistance (Junction-to-Case) of 1.1°C/W enables efficient heat transfer to PCB copper or external heatsinks in high-reliability automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 20.0 / 22.1 V @ 5 mA - Ensures reliable turn-on margin above battery nominal voltage |
| VC @ IPP | 29.2 V @ 123 A (10/1000µs) - Limits downstream IC voltage stress during load dump events |
| PPK | 3600 W - Handles ISO16750-2 Pulse 5a (load dump) surges without failure |
| RθJC | 1.1 °C/W - Enables direct thermal coupling to PCB ground plane or heatsink for sustained power dissipation |
| IFSM | 500 A @ 8.3 ms - Withstands high-energy single-half-sine surge without bond wire fusing |
| TJ range | −55 to +175 °C - Supports operation in engine compartment environments |
Pinout & Package
Package: DO-218 (Type E), molded plastic, UL 94V-0 rated, with heatsink acting as anode terminal. Polarity marked by cathode bar on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive connection point | Must be soldered to large copper area or external heatsink for thermal management and current return path |
| Cathode (Lead) | Transient current sink | Connected to protected line (e.g., battery feed); carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP support and IATF 16949 manufacturing |
| ISO16750-2 & ISO7637-2 compliance | Meets Pulse 5a (load dump) and Pulse 1/2a/3a/3b surge immunity requirements |
| Low thermal resistance (1.1°C/W) | Enables >80% of rated power dissipation at TC = +100°C in production layouts |
| RoHS 3 & Halogen-free | Complies with EU Directive 2015/863/EU and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| High-temperature reverse leakage stability | ≤150 µA at VRWM and TJ = +175°C ensures minimal standby power loss in hot environments |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Feed |
|---|---|
Use Scenario: Protects microcontroller and CAN transceiver power rails from alternator load dump transients during ignition-off events. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes to ≤29.2V within nanoseconds, preventing latch-up or oxide breakdown in 3.3V/5V regulators. Use Value: Eliminates need for secondary overvoltage crowbar circuits while maintaining AEC-Q100 system-level compliance. | Use Scenario: Shields LIN bus interface ICs and power switches from ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (capacitive discharge) events. IC Role / Device Role / Timing Role: Fast-response clamping element placed upstream of DC-DC converter input, absorbing up to 3600W for 1ms. Use Value: Reduces board space vs. multi-stage protection and avoids voltage overshoot exceeding 30V at BCM input pins. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and serializer ICs against battery line surges during vehicle jump-start or alternator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage protection on 12V camera power rail, with clamping action completing within 1ns to prevent pixel corruption. Use Value: Maintains signal integrity during transient events without requiring additional filtering that would degrade high-speed video bandwidth. | Use Scenario: Guards gate drivers and current sense amplifiers from inductive kickback during EPS motor phase commutation. IC Role / Device Role / Timing Role: High-current TVS placed at H-bridge supply node, conducting 500A surge current without degradation over 100k cycles. Use Value: Extends field lifetime by preventing cumulative damage to MOSFET gate oxides and op-amp inputs under repeated load dump exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Lower PPK (400W), SMA package, RθJC ≈ 50°C/W | Not suitable for load dump; limited to ISO7637-2 Pulse 1/2 only | Select when cost sensitivity outweighs surge energy requirement and thermal constraints allow smaller footprint |
| SMCJ18A | PPK = 1500W, SMC package, RθJC ≈ 3.5°C/W, same VRWM | Acceptable for moderate load dump but fails at full ISO16750-2 Pulse 5a energy | Choose if board layout restricts DO-218 mounting area but still requires >1000W surge handling |
Compared with SMAJ18A and SMCJ18A, DM5W18AQ-13 delivers 2.4× higher peak power and 3.2× lower thermal resistance-enabling single-device compliance with full automotive load dump standards without parallel devices or heatsink augmentation.
Availability
DM5W18AQ-13 is available at Aetrix Electronics and suitable for automotive ECU power protection, ADAS camera module surge hardening, and electric power steering motor driver designs requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for DM5W18AQ-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.
The DM5WxxAQ series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for ISO16750-2 and ISO7637-2-compliant automotive power rail protection with emphasis on thermal performance and surge endurance.
FAQ
What is the maximum clamping voltage of DM5W18AQ-13 under standard test conditions?
The maximum clamping voltage (VC) is 29.2 V at 123 A peak pulse current using a 10/1000 µs waveform, measured per JEDEC standards. 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 DM5W18AQ-13 be used in bidirectional configurations?
No-DM5W18AQ-13 is a unidirectional TVS diode with anode-connected heatsink polarity. Its internal structure supports only forward-biased conduction from heatsink to cathode lead. For bidirectional protection, two devices must be connected in series opposition or a dedicated bidirectional part like DM5W18CAQ-13 must be selected.
How does the DO-218 package affect PCB layout and thermal design?
The DO-218 (Type E) package requires a minimum 13.5 mm × 9.0 mm copper pad for the anode heatsink, with ≥2 oz copper thickness recommended. Thermal vias (≥8× 0.3 mm diameter) beneath the pad are essential to transfer heat to inner layers or chassis, as RθJC = 1.1°C/W assumes optimal thermal interface to a 25°C ambient heatsink.
Is DM5W18AQ-13 compliant with RoHS 3 and halogen-free requirements?
Yes-DM5W18AQ-13 meets EU Directive 2015/863/EU (RoHS 3), contains <900 ppm bromine and chlorine (combined <1500 ppm), and <1000 ppm antimony compounds, satisfying Diodes Incorporated's "Green" product definition. Lead-free matte tin plating is solderable per MIL-STD-202, Method 208.
DM5W18AQ-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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 123A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218
DM5W18AQ-13 FAQ
1.How can I place an order for DM5W18AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W18AQ-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 DM5W18AQ-13 reliable?
The price and inventory of DM5W18AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W18AQ-13 is usually 5 days.
3.What payment methods are accepted for DM5W18AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W18AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W18AQ-13?
DM5W18AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W18AQ-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 DM5W18AQ-13?
For technical support, including DM5W18AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W18AQ-13 requirements.
6.How does Aetrix verify that DM5W18AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM5W18AQ-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 DM5W18AQ-13 meets industry standards.
7.What is the process for return or replacement of DM5W18AQ-13?
All DM5W18AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W18AQ-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 DM5W18AQ-13 part is unused and in its original packaging.
Return procedure for DM5W18AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W18AQ-13 Tags
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