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Diodes Incorporated DM5W20AQ-13
- Part No.:
- DM5W20AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W20AQ-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:6,965
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Product details
Overview
DM5W20AQ-13 from Diodes Incorporated is a 3600W surface-mount transient voltage suppressor (TVS) diode designed for automotive load dump and ISO7637-2 surge protection. It features a 20V reverse standoff voltage (VRWM), 22.2–24.5V breakdown voltage (VBR), 32.4V clamping voltage (VC) at 111A peak pulse current, and AEC-Q101 qualification for under-hood power rail protection in engine control units and body electronics.
For engineers reviewing the DM5W20AQ-13 datasheet, DM5W20AQ-13 pinout, DM5W20AQ-13 application, or DM5W20AQ-13 equivalent, key selection criteria include ISO16750-2 Pulse A/B compliance, 1.1°C/W junction-to-case thermal resistance, DO-218 package polarity (heatsink = anode), and 175°C maximum operating temperature for high-reliability automotive environments.
Technical Context
This unidirectional TVS diode operates as a clamping device in parallel with sensitive automotive electronics to divert high-energy transients-such as 12V/24V system load dump surges (ISO16750-2) and coupled noise pulses (ISO7637-2 Pulse 1, 2a, 3a, 3b)-away from downstream ICs and microcontrollers. Its low clamping ratio (VC/VBR ≈ 1.46) and 111A peak pulse current rating ensure robust overvoltage suppression without sacrificing response time.
The DO-218 (Type E) package integrates a thermally optimized heatsink-anode structure, enabling 5W steady-state power dissipation at TC = +25°C and maintaining stable clamping performance up to TJ = +175°C. Thermal resistance of 1.1°C/W allows direct mounting to PCB copper pour for efficient heat transfer during repetitive surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3600W (10/1000µs waveform): handles automotive load dump energy without failure |
| Reverse Standoff Voltage | 20V: sets minimum operating voltage threshold before clamping activates |
| Breakdown Voltage | 22.2–24.5V @ 5mA: defines precise avalanche onset range for predictable triggering |
| Clamping Voltage | 32.4V @ 111A: limits maximum voltage seen by protected circuit during surge |
| Junction-to-Case Thermal Resistance | 1.1°C/W: enables effective heat conduction to PCB heatsink for sustained operation |
| Operating Temperature Range | −55°C to +175°C: supports under-hood deployment in extreme ambient conditions |
| AEC-Q101 Qualified | Yes: validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: DO-218 (Type E), surface-mount, molded plastic UL 94V-0 housing with matte tin-plated terminals. Heatsink tab is electrically connected to the anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive input / surge return path | Primary thermal interface and current return node; must be soldered to large copper area |
| Cathode (Top Lead) | Protected circuit connection | Connected to the line being safeguarded (e.g., battery rail); clamps to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 3600W Peak Pulse Power | Supports full ISO16750-2 Load Dump (Pulse 5a) without degradation in 12V/24V systems |
| Low Clamping Ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during fast transients, reducing stress on downstream regulators and MCUs |
| 1.1°C/W RθJC | Enables >4× higher steady-state power handling vs. standard SMA packages at same footprint |
| AEC-Q101 Qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing control |
| RoHS & Halogen-Free Compliance | Meets EU RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Rail |
|---|---|
Use Scenario: Protects 5V/3.3V LDOs and MCU power domains from alternator load dump spikes during ignition-off events. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and primary DC/DC converter input. Use Value: Limits transient voltage to ≤32.4V, preventing latch-up or permanent damage to automotive-grade PMICs rated for 36V max input. |
Use Scenario: Shields LIN bus transceivers and door module microcontrollers from ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (capacitive discharge). IC Role / Device Role / Timing Role: Parallel-connected surge absorber on 12V supply line upstream of local regulators. Use Value: Maintains <10µA leakage at 20V VRWM, avoiding quiescent current impact on always-on BCM sleep modes. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Safeguards image sensor power rails in rear-view and surround-view cameras exposed to vehicle-level surges during jump-start or battery replacement. IC Role / Device Role / Timing Role: Primary front-end TVS on 12V input to camera module's buck converter. Use Value: Withstands 175°C junction temperature, ensuring reliability in sealed, non-ventilated camera housings near exhaust components. |
Use Scenario: Protects gate drivers and current-sense amplifiers in EPS motor control boards from load dump and back-EMF spikes during rapid deceleration. IC Role / Device Role / Timing Role: High-power clamping element mounted directly to aluminum heatsink on motor driver PCB. Use Value: 500A IFSM rating supports single-pulse survivability during worst-case 24V system load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Lower peak power (400W), SMA package, RθJC ≈ 50°C/W, no AEC-Q101 qualification | Not suitable for load dump; limited to ISO7637-2 Pulse 1/2a only | Select only for cost-sensitive non-automotive industrial designs with lower surge energy |
| SMCJ20A-Q | 3000W peak power, SMC package, RθJC ≈ 2.5°C/W, AEC-Q101 qualified | Marginally lower clamping (32.0V @ 94A) but insufficient for full ISO16750-2 Pulse 5a compliance | Acceptable for 12V systems with derated load dump margin; verify with system-level testing |
Compared with SMAJ20A and SMCJ20A-Q, DM5W20AQ-13 delivers 20% higher clamping current capacity (111A vs. 94A/38A), 4.5× better thermal resistance, and full ISO16750-2 Pulse 5a compliance-making it the only option qualified for next-generation 24V commercial vehicle power architectures.
Availability
DM5W20AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering modules requiring stable component supply across automotive production lifecycles.
Supply support for DM5W20AQ-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.
The DM5WxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for high-energy load dump and ISO7637-2 surge immunity in 12V/24V vehicle electrical systems.
FAQ
What is the polarity configuration of DM5W20AQ-13?
The DM5W20AQ-13 is a unidirectional TVS diode with the heatsink tab serving as the anode (+) and the top lead as the cathode (–). This configuration requires the anode to be connected to the protected circuit's ground or low-side reference, while the cathode connects to the line needing protection. Polarity is marked by a bar symbol on the cathode end of the DO-218 package.
Does DM5W20AQ-13 meet ISO16750-2 Pulse 5a requirements?
Yes-DM5W20AQ-13 is explicitly rated for 3600W peak pulse power at 10/1000µs, which satisfies the full energy requirement of ISO16750-2 Pulse 5a (load dump) for both 12V and 24V automotive systems. Its 32.4V clamping voltage at 111A ensures protected circuits remain within safe operating limits during this standardized surge event.
Can DM5W20AQ-13 be used in bidirectional configurations?
No-DM5W20AQ-13 is strictly unidirectional and not rated for reverse-biased surge suppression. For bidirectional protection (e.g., data lines or AC-coupled signals), Diodes offers the complementary D5W20AQ series. Using DM5W20AQ-13 in reverse bias risks catastrophic failure due to lack of symmetrical avalanche characteristics.
What is the recommended PCB layout for thermal performance?
Optimal thermal performance requires soldering the anode (heatsink tab) to ≥250 mm² of 2 oz copper on an internal or external layer, with ≥4 thermal vias (0.3mm diameter, filled or plated) connecting to inner ground planes. The datasheet specifies a suggested pad layout with 3.3mm (G), 3.5mm (X), and 11.0mm (X1) dimensions to maximize thermal conduction and mechanical reliability.
DM5W20AQ-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 111A
- 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
DM5W20AQ-13 FAQ
1.How can I place an order for DM5W20AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W20AQ-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 DM5W20AQ-13 reliable?
The price and inventory of DM5W20AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W20AQ-13 is usually 5 days.
3.What payment methods are accepted for DM5W20AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W20AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W20AQ-13?
DM5W20AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W20AQ-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 DM5W20AQ-13?
For technical support, including DM5W20AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W20AQ-13 requirements.
6.How does Aetrix verify that DM5W20AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM5W20AQ-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 DM5W20AQ-13 meets industry standards.
7.What is the process for return or replacement of DM5W20AQ-13?
All DM5W20AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W20AQ-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 DM5W20AQ-13 part is unused and in its original packaging.
Return procedure for DM5W20AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W20AQ-13 Tags
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