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Diodes Incorporated DM8W20AQ-13
- Part No.:
- DM8W20AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W20AQ-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:8,412
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Product details
Overview
DM8W20AQ-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 20 V reverse standoff voltage (VRWM), 32.4 V maximum clamping voltage (VC) at 204 A peak pulse current (Ipp), and 6600 W peak pulse power dissipation (10/1000 µs waveform), operating from –55°C to +175°C in DO-218 (Type E) package.
For engineers reviewing the DM8W20AQ-13 datasheet, DM8W20AQ-13 pinout, DM8W20AQ-13 application, or DM8W20AQ-13 equivalent, key selection criteria include ISO16750-2 Pulse A/B compliance, AEC-Q101 qualification, TJ = +175°C capability, glass-passivated die construction, and heatsink-as-anode polarity configuration for high-reliability automotive power rail protection.
Technical Context
This unidirectional TVS diode operates as a clamping device across DC power rails-typically between battery and sensitive electronics-to limit transient overvoltages during load-dump events (ISO16750-2) and coupled surges (ISO7637-2 Pulse 1/2a/3a/3b). Its 0.9 °C/W junction-to-case thermal resistance enables effective heat transfer to an external heatsink.
The device uses a glass-passivated junction for stable leakage performance up to +175°C, with <150 µA max reverse leakage at VRWM and +175°C. Its 10/1000 µs waveform rating reflects standardized surge immunity testing for 12 V automotive systems, where clamping occurs within nanoseconds of overvoltage onset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; matches nominal 12 V automotive system with margin for ripple and transients. |
| VC @ IPP | 32.4 V - Clamped voltage at 204 A peak pulse; ensures downstream ICs with 36 V absolute max ratings remain protected. |
| PPK | 6600 W - Peak pulse power handling (10/1000 µs); sustains single load-dump surges up to 100 V × 66 A without failure. |
| IFSM | 700 A - Non-repetitive forward surge current (8.3 ms half-sine); supports high-energy battery disconnection events. |
| RθJC | 0.9 °C/W - Junction-to-case thermal resistance; enables direct mounting to heatsink for reliable power dissipation under sustained stress. |
| TJ Range | –55°C to +175°C - Full automotive temperature range; validated for under-hood applications including engine control units. |
| AEC-Q101 | Qualified - Certified for automotive use with PPAP capability and manufacturing in IATF 16949 certified facilities. |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), 2.74 g weight. Anode terminal is the metal heatsink tab; cathode is the leaded terminal marked with a bar. Polarity must be observed during PCB layout to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Heatsink Tab | Anode (+) | Primary current path during clamping; must be soldered to large copper area or external heatsink for thermal management. |
| Leaded Terminal | Cathode (–) | Connected to protected circuit ground or low-side return; polarity indicator (bar) on top surface confirms cathode orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 6600 W Peak Pulse Power | Handles full ISO16750-2 load-dump energy (up to 100 V, 66 A) without degradation when mounted to heatsink. |
| Glass-Passivated Die | Ensures stable leakage (<150 µA at +175°C) and long-term reliability in high-humidity, high-temperature under-hood environments. |
| DO-218 (Type E) Package | Enables high-current conduction and low thermal resistance (0.9 °C/W) via metal tab heatsinking-critical for automotive power rail protection. |
| AEC-Q101 Qualification | Validated for automotive production use with change control, PPAP documentation, and IATF 16949 manufacturing traceability. |
| Lead-Free & Halogen-Free | RoHS 3 compliant with <900 ppm Br/Cl and <1000 ppm Sb; meets global environmental requirements for Tier 1 automotive supply chains. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Interface |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and sensor interfaces from alternator load-dump spikes during battery disconnect. IC Role / Device Role: Unidirectional clamping TVS placed between battery feed and input filter capacitor. Use Value: Limits voltage to ≤32.4 V during 6600 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Shields LIN bus transceivers and power management ICs from ISO7637-2 Pulse 1 (inductive kickback) and Pulse 3b (capacitive discharge). IC Role / Device Role: High-energy transient suppressor on 12 V main rail upstream of DC-DC converters. Use Value: Maintains <150 µA leakage at +175°C, ensuring low quiescent current in always-on BCM sleep modes. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Safeguards image sensor and ISP power rails against cranking-induced transients and load-dump coupling through shared harnesses. IC Role / Device Role: Primary overvoltage clamp on 12 V input to buck converter supplying 1.8 V/2.8 V imaging subsystems. Use Value: 0.9 °C/W RθJC allows direct heatsink mounting, sustaining repeated 10/1000 µs pulses without thermal runaway. |
Use Scenario: Protects H-bridge gate drivers and current sense amplifiers from motor back-EMF and battery reversal transients. IC Role / Device Role: Bidirectional-capable unidirectional TVS (anode-to-heatsink) used with reverse-polarity protection diode. Use Value: 700 A IFSM rating handles 8.3 ms motor stall surges without bond wire fusing or junction failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Lower PPK (400 W), DO-214AC package, RθJC ≈ 50 °C/W, no AEC-Q101 qualification. | Rated for consumer/industrial use only; insufficient for ISO16750-2 load-dump (requires parallel devices). | Select only for non-automotive 12 V systems with lower surge exposure and no thermal constraints. |
| SMCJ20A-Q | 6000 W PPK, DO-214AB package, RθJC ≈ 2.5 °C/W, AEC-Q101 qualified, but no heatsink tab. | Limited thermal capacity in high-ambient environments; requires larger PCB copper for equivalent cooling. | Prefer where board space permits large thermal pads but mechanical heatsinking is impractical. |
Compared with SMAJ20A and SMCJ20A-Q, DM8W20AQ-13 delivers superior thermal management via its DO-218 heatsink tab, higher 6600 W surge rating, and verified ISO16750-2 Pulse A/B compliance-making it the only choice for compact, high-power automotive modules requiring single-device load-dump protection.
Availability
DM8W20AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering designs requiring stable component supply across automotive production lifecycles.
Supply support for DM8W20AQ-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 power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.
The DM8W series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO16750-2 and ISO7637-2 compliance in harsh under-hood environments with extended temperature operation and robust thermal design.
FAQ
What is the correct PCB layout for DM8W20AQ-13 to ensure thermal reliability?
The heatsink tab (anode) must be soldered to a minimum 200 mm² copper area with ≥2 thermal vias (0.3 mm diameter, filled) connecting to inner ground/power planes. Pad dimensions per Diodes' suggested layout: G = 3.30 mm, X = 3.50 mm, Y = 3.00 mm. Avoid solder mask over the tab to maximize thermal transfer.
Does DM8W20AQ-13 meet both ISO16750-2 and ISO7637-2 requirements?
Yes-DM8W20AQ-13 is explicitly tested and rated for ISO16750-2 Pulse A (load dump) and Pulse B (battery reversal), and ISO7637-2 Pulse 1 (inductive switch-off), Pulse 2a (supply interruption), and Pulses 3a/3b (capacitive coupling). Test data is published in DS41002 Rev. 7.
Can DM8W20AQ-13 be used in bidirectional protection configurations?
No-it is a unidirectional TVS diode with anode-as-heatsink polarity. For bidirectional protection, two DM8W20AQ-13 devices must be connected in series opposing configuration (anode-to-anode), or a dedicated bidirectional part like DM8W20CAQ-13 should be selected.
What is the maximum allowable case temperature during continuous operation?
Per the derating curve (Figure 1), DM8W20AQ-13 delivers full 8 W steady-state power only at TC = +25°C. At TC = +125°C, PM(AV) drops to ~4.5 W. Continuous operation above +175°C case temperature violates the absolute maximum rating and risks permanent parametric shift or failure.
DM8W20AQ-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):
- -
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
DM8W20AQ-13 FAQ
1.How can I place an order for DM8W20AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W20AQ-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 DM8W20AQ-13 reliable?
The price and inventory of DM8W20AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W20AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W20AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W20AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W20AQ-13?
DM8W20AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W20AQ-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 DM8W20AQ-13?
For technical support, including DM8W20AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W20AQ-13 requirements.
6.How does Aetrix verify that DM8W20AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W20AQ-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 DM8W20AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W20AQ-13?
All DM8W20AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W20AQ-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 DM8W20AQ-13 part is unused and in its original packaging.
Return procedure for DM8W20AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W20AQ-13 Tags
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