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Diodes Incorporated DM8W28AQ-13
- Part No.:
- DM8W28AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W28AQ-13.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:8,085
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Product details
Overview
DM8W28AQ-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 28 V reverse standoff voltage (VRWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V clamping voltage (VC) at 145 A peak pulse current, and 6600 W peak pulse power dissipation in a DO-218 (Type E) package. It is qualified to AEC-Q101 and rated for operation from –55 °C to +175 °C.
For engineers reviewing the DM8W28AQ-13 datasheet, DM8W28AQ-13 pinout, DM8W28AQ-13 application, or DM8W28AQ-13 equivalent, key selection criteria include clamping performance under 10/1000 µs surges, thermal resistance (RθJC = 0.9 °C/W), compliance with ISO16750-2 Pulse A/B and ISO7637-2 Pulses 1/2a/3a/3b, and suitability for high-temperature engine-bay environments.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for high-energy transients in 12 V automotive electrical systems. Its DO-218 (Type E) package provides low thermal resistance (0.9 °C/W) and direct heatsink mounting via the anode tab, enabling effective power dissipation during load-dump events up to 6600 W.
The device operates with polarity-defined terminals: the metal heatsink serves as the anode (+), and the molded plastic body incorporates a cathode bar marking. It delivers stable clamping down to –55 °C and up to +175 °C, with leakage current limited to 150 µA at VRWM and TJ = +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 28 V - Maximum continuous reverse operating voltage before significant leakage; sets system overvoltage threshold for 12 V nominal battery systems. |
| VBR @ IT=5 mA | 31.1–34.4 V - Breakdown onset range; ensures reliable conduction onset above normal battery transients but below damage thresholds of protected ICs. |
| VC @ Ipp=145 A | 45.4 V - Clamped voltage during 10/1000 µs surge; limits stress on downstream components such as CAN transceivers or microcontrollers. |
| PPK | 6600 W - Peak pulse power handling per 10/1000 µs waveform; supports full ISO16750-2 Load Dump (Pulse 5a) energy without failure. |
| RθJC | 0.9 °C/W - Junction-to-case thermal resistance; enables efficient heat transfer to PCB copper or external heatsink for sustained surge duty. |
| TJ Range | –55 to +175 °C - Extended temperature rating; validated for under-hood placement near engines or power electronics. |
| IFSM | 700 A - Non-repetitive forward surge capability; withstands high-current short-circuit transients during fault conditions. |
Pinout & Package
Package: DO-218 (Type E), surface-mount, molded plastic case with UL 94V-0 flammability rating; anode connected to metal heatsink tab, cathode marked by bar on top surface; weight ≈ 2.74 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive terminal / thermal path | Electrically connects to system ground or battery return; primary thermal interface for heat dissipation into PCB copper pour or heatsink. |
| Cathode (Bar-marked lead) | Negative terminal / surge shunt node | Connects to protected line (e.g., 12 V rail); conducts surge current to anode when reverse voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP support and IATF 16949 manufacturing; required for Tier 1 supply chain integration. |
| Glass-passivated die | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives; critical for under-hood humidity exposure. |
| Lead-free & halogen-free | RoHS 3 compliant (<900 ppm Br/Cl, <1000 ppm Sb); meets global environmental regulations without compromising surge robustness. |
| ISO16750-2 & ISO7637-2 compliance | Tested to Pulse A/B (load dump) and Pulses 1/2a/3a/3b (switching transients); eliminates need for additional validation in automotive ECUs. |
| High-temperature stability | Leakage remains ≤150 µA at VRWM and +175 °C; prevents false triggering or thermal runaway in hot engine compartments. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) 12 V Rail |
|---|---|
Use Scenario: Protects ECU main 12 V input against alternator load-dump surges (ISO16750-2 Pulse 5a) and ignition-switching transients. IC Role / Device Role / Timing Role: Primary shunt TVS placed upstream of DC-DC converters and LDOs; clamps transients within 100 ns. Use Value: Limits rail voltage to ≤45.4 V during 6600 W surges, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. |
Use Scenario: Shields BCM power domain from battery line transients caused by relay switching, motor loads, and jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS on fused 12 V feed; absorbs repetitive ISO7637-2 Pulse 3b (capacitive discharge) spikes. Use Value: Maintains <150 µA leakage at +175 °C, ensuring low quiescent current in always-on modules without battery drain. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Infotainment Head Unit Power Supply |
Use Scenario: Safeguards 12 V input to ADAS camera modules mounted near engine bay, exposed to high ambient temperature and load-dump events. IC Role / Device Role / Timing Role: High-reliability TVS with RθJC = 0.9 °C/W; thermally coupled to metal chassis for rapid transient energy dissipation. Use Value: Enables operation up to +175 °C ambient while maintaining clamping integrity-critical for compact, sealed camera housings. |
Use Scenario: Guards infotainment head unit power entry against jump-start surges and battery reversal during service operations. IC Role / Device Role / Timing Role: Bidirectional-capable protection (anode-grounded configuration) with low capacitance (<100 pF at 1 MHz for similar variants). Use Value: Prevents audio distortion or display glitches by limiting voltage overshoot to <45.4 V without adding signal-path capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Lower PPK (400 W), DO-214AC package, RθJC ≈ 50 °C/W, no AEC-Q101 qualification | Rated only for non-automotive industrial use; insufficient for ISO16750-2 load dump | Select only for cost-sensitive consumer-grade 12 V circuits with sub-100 A surge requirements. |
| SM8S28A | Same DO-218 package, 6600 W PPK, but VBR = 31.1–34.4 V and VC = 45.4 V identical; AEC-Q101 qualified | Functionally identical clamping behavior; differs only in manufacturer branding and traceability documentation | Valid drop-in alternative if Diodes' supply chain constraints require second-source procurement with identical electrical and thermal specs. |
Compared with SMAJ28A and SM8S28A, DM8W28AQ-13 uniquely combines AEC-Q101 qualification, 0.9 °C/W thermal resistance, and verified ISO16750-2 Pulse 5a compliance in a single-source automotive-grade TVS-making it the preferred choice for safety-critical ECU and ADAS power protection where thermal margin and standards traceability are mandatory.
Availability
DM8W28AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for DM8W28AQ-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing facilities certified to IATF 16949 for automotive-grade products.
The DM8WxxAQ series belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically to meet stringent ISO16750-2 and ISO7637-2 surge immunity requirements in harsh vehicle environments.
FAQ
What is the maximum clamping voltage of DM8W28AQ-13 at its rated peak pulse current?
The DM8W28AQ-13 clamps to 45.4 V at 145 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 is measured per JEDEC test methods defined in the DS41002 datasheet.
Is DM8W28AQ-13 suitable for bidirectional surge protection?
No-DM8W28AQ-13 is a unidirectional TVS diode with anode-connected heatsink and cathode-marked terminal. It protects against reverse-polarity transients only when installed with anode grounded. For bidirectional protection, two devices must be used in series-opposing configuration or a dedicated bidirectional part selected.
How does the DO-218 (Type E) package improve thermal performance over DO-214AB or SMA packages?
The DO-218 (Type E) package achieves RθJC = 0.9 °C/W due to its large metal heatsink tab directly bonded to the silicon die, enabling >7× better junction-to-case thermal transfer than DO-214AB (RθJC ≈ 6.5 °C/W). This allows sustained 6600 W surge handling without thermal runaway in high-ambient applications.
Does DM8W28AQ-13 require derating at elevated ambient temperatures?
Yes-its steady-state power dissipation (PM(AV) = 8 W) is specified at TC = +25 °C. Derating follows the curve in Figure 1 of DS41002: at TC = +125 °C, PM(AV) drops to ~4.5 W. Designers must ensure case temperature stays within limits using adequate copper area or heatsinking to maintain reliability.
DM8W28AQ-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 145A
- 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
DM8W28AQ-13 FAQ
1.How can I place an order for DM8W28AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W28AQ-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 DM8W28AQ-13 reliable?
The price and inventory of DM8W28AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W28AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W28AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W28AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W28AQ-13?
DM8W28AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W28AQ-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 DM8W28AQ-13?
For technical support, including DM8W28AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W28AQ-13 requirements.
6.How does Aetrix verify that DM8W28AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W28AQ-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 DM8W28AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W28AQ-13?
All DM8W28AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W28AQ-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 DM8W28AQ-13 part is unused and in its original packaging.
Return procedure for DM8W28AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W28AQ-13 Tags
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