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Diodes Incorporated DM6W18AQ-13
- Part No.:
- DM6W18AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM6W18AQ-13.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:9,402
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Product details
Overview
DM6W18AQ-13 from Diodes Incorporated is a DO-218 (Type E) surface-mount transient voltage suppressor (TVS) diode designed for automotive load-dump and surge protection. It features 4600W peak pulse power (10/1000µs), 18V reverse standoff voltage (VRWM), 29.2V max clamping voltage at 158A IPP, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the DM6W18AQ-13 datasheet, DM6W18AQ-13 pinout, DM6W18AQ-13 application, or DM6W18AQ-13 equivalent, this device is selected for ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b compliance in 12V/24V automotive power rails where high-energy transients, low thermal resistance (1.0°C/W), and anode-heatsink polarity are critical design constraints.
Technical Context
This unidirectional TVS diode operates as a clamping device in parallel with sensitive electronics, conducting only when reverse voltage exceeds its 20.0–22.1V breakdown range (VBR @ 5mA). Its DO-218 package enables direct heatsink mounting via the anode terminal, achieving 1.0°C/W junction-to-case thermal resistance for sustained 6W average power dissipation at TC = +25°C.
The device meets automotive-grade reliability requirements: operating temperature range of −55°C to +175°C, IATF 16949 manufacturing, PPAP capability, and RoHS/halogen-free compliance. It is not intended for bidirectional surge suppression or AC line protection due to its unidirectional architecture and polarity-specific heatsink interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 4600W (10/1000µs waveform): absorbs full ISO 16750-2 load-dump energy without failure |
| Reverse Standoff Voltage | 18V: blocks normal 12V/24V system voltages while allowing margin before clamping |
| Clamping Voltage | 29.2V @ 158A IPP: limits downstream voltage to safe levels during worst-case transients |
| Junction-to-Case Thermal Resistance | 1.0°C/W: enables direct heatsink coupling for thermal management in high-power surges |
| AEC-Q101 Qualified | Validated for automotive use: qualified per stress test conditions including temperature cycling, HTRB, and surge life |
| Operating Temperature Range | −55°C to +175°C: supports placement near engines or in battery junction boxes |
| Package | DO-218 (Type E): surface-mount outline with integrated heatsink interface on anode terminal |
Pinout & Package
DO-218 (Type E) package with anode-connected metal tab serving as primary thermal path and electrical terminal. Polarity marked by bar symbol denoting cathode; heatsink surface is electrically connected to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive DC input / Ground reference for clamping | Primary thermal conduction path to PCB copper or external heatsink; must be soldered to thermal pad |
| Cathode (Top Lead) | Surge current return path / Protected circuit node | Connected to protected line (e.g., alternator output); conducts transient current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 4600W Peak Pulse Power | Handles full ISO 16750-2 load-dump events (up to 120V, 100ms exponential) without degradation |
| Anode-Heatsink Polarity | Enables low-impedance thermal path directly from junction to chassis ground or heatsink |
| Low Clamping Ratio (VC/VRWM ≈ 1.62) | Minimizes overvoltage stress on downstream MOSFETs, regulators, and microcontrollers |
| 150µA Max Reverse Leakage @ 175°C | Maintains low standby power loss and avoids false triggering in high-temp engine compartments |
| AEC-Q101 + IATF 16949 | Supports PPAP submission and long-term supply continuity for Tier-1 automotive programs |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Rail |
|---|---|
Use Scenario: Protects 5V/3.3V regulator inputs from alternator load-dump spikes during battery disconnection. IC Role / Device Role: Unidirectional clamping TVS placed between battery rail and LDO input capacitor. Use Value: Limits transient voltage to ≤29.2V, preventing regulator latch-up and enabling single-stage protection without series impedance. |
Use Scenario: Shields BCM microcontroller power domains from ISO 7637-2 Pulse 3b (capacitive discharge) noise on 12V supply. IC Role / Device Role: Parallel surge suppressor across bulk input capacitor, referenced to chassis ground via anode tab. Use Value: Achieves <10ns response time and 1.0°C/W thermal resistance to sustain repeated 100A pulses without derating. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and SerDes ICs against coupled transients from nearby high-current actuators. IC Role / Device Role: Low-capacitance (≈36pF @ 0V) TVS on 12V camera power input, mounted adjacent to connector. Use Value: Clamps to 29.2V while adding negligible signal distortion to high-speed video lines routed on same PCB. |
Use Scenario: Protects gate drivers and current-sense amplifiers from inductive kickback during EPS motor commutation. IC Role / Device Role: High-energy TVS on motor phase supply rail, thermally anchored to aluminum heatplate via anode tab. Use Value: Dissipates 4600W peak energy without thermal runaway, maintaining <±0.5V regulation tolerance on driver VDD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-Q | Lower peak power (400W), SMA package, RθJC = 45°C/W | Limited to low-energy ISO 7637-2 Pulse 1/3 only; unsuitable for load-dump | Select only for cost-sensitive non-load-dump applications with adequate board-level heatsinking |
| SMCJ18A-Q | Same 18V VRWM, 4600W rating, but SMC package with RθJC = 2.5°C/W | Requires larger PCB footprint; no integrated heatsink tab - relies on copper area | Prefer when mechanical mounting to external heatsink is impractical and board thermal mass is sufficient |
Compared with SMAJ18A-Q and SMCJ18A-Q, DM6W18AQ-13 delivers superior thermal performance (1.0°C/W vs. 45/2.5°C/W) and mechanical robustness via its DO-218 anode-tab interface - essential for sustained load-dump immunity in space-constrained engine-bay layouts.
Availability
DM6W18AQ-13 is available at Aetrix Electronics and suitable for automotive ECU power protection, ADAS camera supply conditioning, body control module surge hardening, and electric power steering subsystems requiring stable component supply across extended product lifecycles.
Supply support for DM6W18AQ-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 DM6WxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO 16750-2 load-dump and ISO 7637-2 surge immunity in 12V/24V vehicle electrical systems.
FAQ
What is the maximum clamping voltage of DM6W18AQ-13 at rated peak pulse current?
The maximum clamping voltage (VC) is 29.2V at 158A peak pulse current (IPP), measured using a 10/1000µs waveform per IEC 61000-4-5. This value ensures downstream 3.3V/5V regulators remain within absolute maximum ratings during ISO 16750-2 Pulse A events.
Can DM6W18AQ-13 be used in bidirectional surge protection circuits?
No. DM6W18AQ-13 is a unidirectional TVS diode with anode-heatsink polarity. It conducts only during reverse overvoltage events. Bidirectional protection requires two devices in series opposition or a dedicated bidirectional part such as the DMP1818Q.
How is thermal management implemented in the DO-218 package?
Thermal management relies on soldering the anode (metal tab) directly to a large copper thermal pad or external heatsink. The specified 1.0°C/W junction-to-case resistance assumes full metallurgical contact between the tab and heatsink surface, with no thermal interface material required.
Is DM6W18AQ-13 compatible with lead-free reflow processes?
Yes. It features matte tin-plated terminals compliant with J-STD-020 moisture sensitivity level 1 and rated for standard Pb-free reflow profiles (peak temperature ≤260°C). The molded plastic package meets UL 94V-0 flammability requirements.
DM6W18AQ-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):
- 158A
- Power - Peak Pulse:
- 4600W (4.6kW)
- 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
DM6W18AQ-13 FAQ
1.How can I place an order for DM6W18AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM6W18AQ-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 DM6W18AQ-13 reliable?
The price and inventory of DM6W18AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM6W18AQ-13 is usually 5 days.
3.What payment methods are accepted for DM6W18AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM6W18AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM6W18AQ-13?
DM6W18AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM6W18AQ-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 DM6W18AQ-13?
For technical support, including DM6W18AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM6W18AQ-13 requirements.
6.How does Aetrix verify that DM6W18AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM6W18AQ-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 DM6W18AQ-13 meets industry standards.
7.What is the process for return or replacement of DM6W18AQ-13?
All DM6W18AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM6W18AQ-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 DM6W18AQ-13 part is unused and in its original packaging.
Return procedure for DM6W18AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM6W18AQ-13 Tags
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