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Diodes Incorporated DM8W26AQ-13
- Part No.:
- DM8W26AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W26AQ-13.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:7,236
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Product details
Overview
DM8W26AQ-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 26 V reverse standoff voltage (VRWM), 42.1 V maximum clamping voltage (VC) at 157 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 DM8W26AQ-13 datasheet, DM8W26AQ-13 pinout, DM8W26AQ-13 application, or DM8W26AQ-13 equivalent, this device is selected for high-reliability automotive power rail protection where ISO16750-2 Pulse 5a (load dump) and ISO7637-2 Pulse 1/2a/3a/3b immunity are required, with verified thermal stability up to TJ = +175°C and AEC-Q101 qualification.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for unidirectional surge suppression in 12 V/24 V automotive systems. Its DO-218 (Type E) package integrates an anode-connected heatsink for low thermal resistance (RθJC = 0.9 °C/W) and high IFSM capability (700 A, 8.3 ms half-sine).
The device operates with a defined polarity: heatsink = anode, marked cathode bar on top view. It meets stringent automotive surge standards including ISO16750-2 (Pulse A/B) and ISO7637-2 (Pulse 1, 2a, 3a, 3b), with leakage <150 µA at VRWM and TJ = +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system bus voltage margin for 24 V nominal automotive applications. |
| VBR (min/max) | 28.9 V / 31.9 V @ 5 mA - Breakdown threshold range ensures consistent turn-on behavior across production lots and temperature. |
| VC @ Ipp | 42.1 V @ 157 A (10/1000 µs) - Clamping voltage limits downstream IC stress during load-dump transients; enables robust protection of 48 V tolerant controllers. |
| PPK | 6600 W - Peak pulse power rating validates survivability under worst-case ISO16750-2 Pulse 5a (load dump) waveforms with exponential decay. |
| IFSM | 700 A @ 8.3 ms - Forward surge current rating supports repeated exposure to alternator-induced surges without bond-wire failure. |
| RθJC | 0.9 °C/W - Low junction-to-case thermal resistance enables effective heat transfer to PCB copper or heatsink, critical for sustained power dissipation. |
| TJ Range | –55°C to +175°C - Full automotive temperature range compliance ensures reliability in engine bay and powertrain control units. |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), 2.74 g weight, lead-free matte tin plating, polarity indicated by cathode bar marking; heatsink tab is electrically connected to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive terminal / thermal path | Electrically active anode connection; serves as primary thermal conduction path to PCB copper pour or external heatsink. |
| Cathode (Top Marked Pin) | Negative terminal / surge shunt node | Connected to protected line (e.g., battery rail); conducts transient current to ground/anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 6600 W peak pulse power | Validates single-event survivability against ISO16750-2 Pulse 5a (load dump) up to 35 V, 400 ms duration with exponential decay profile. |
| AEC-Q101 qualified | Confirms qualification for automotive electronics per stress test requirements including HTGB, HTRB, TCT, and mechanical shock. |
| Glass-passivated die | Ensures stable electrical parameters and long-term reliability under high-humidity, high-temperature bias conditions typical in under-hood environments. |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive green material requirements (<900 ppm Br/Cl, <1000 ppm Sb). |
| IATF 16949 manufacturing | Guarantees process control, PPAP documentation readiness, and change management rigor required for Tier 1 automotive supply chains. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Rail |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and sensor interfaces from alternator load-dump spikes during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamps 35 V–40 V transients to ≤42.1 V within nanoseconds, preserving 5 V/3.3 V LDO input integrity. Use Value: Prevents latch-up or permanent damage to 48 V tolerant MCUs (e.g., Infineon AURIX™) during ISO16750-2 Pulse 5a testing. |
Use Scenario: Shields LIN transceivers, LED drivers, and EEPROM from ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (capacitive coupling) noise. IC Role / Device Role / Timing Role: Fast-response clamping element placed upstream of DC-DC converters to limit input voltage excursions below 45 V. Use Value: Enables reliable operation of 24 V BCMs in commercial vehicles where battery voltage can exceed 30 V during charging cycles. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards image sensor SoCs and serializer ICs against coupled transients from nearby high-current actuators in compact camera modules. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V, <200 pF at VRWM) TVS minimizes signal distortion on 1.8 V MIPI CSI-2 power rails. Use Value: Maintains video frame integrity during EMC testing per CISPR 25 Class 5 while meeting AEC-Q100 Grade 2 temperature requirements. |
Use Scenario: Safeguards gate drivers and current-sense amplifiers in 3-phase inverter stages exposed to motor regeneration surges and back-EMF spikes. IC Role / Device Role / Timing Role: High IFSM (700 A) and low RθJC (0.9 °C/W) enable repeated clamping of >500 A short-duration transients without thermal runaway. Use Value: Extends field lifetime of EPS ECUs by preventing cumulative degradation of analog front-end components during aggressive steering maneuvers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Lower PPK (400 W), DO-214AC package, RθJC ≈ 45 °C/W, no AEC-Q101 qualification | Rated only for industrial/commercial use; insufficient for ISO16750-2 Pulse 5a validation | Select only for non-automotive 24 V systems with lower surge severity and no automotive qualification mandate. |
| SMCJ26A-Q | AEC-Q101 qualified, DO-214AB package, PPK = 1500 W, VC = 42.1 V, but Ipp = 35.7 A (10/1000 µs) | Limited to moderate-energy transients (ISO7637-2 Pulse 1/2a); cannot sustain load-dump energy | Use where space constraints prevent DO-218 mounting but full load-dump immunity is not required. |
Compared with SMAJ26A and SMCJ26A-Q, DM8W26AQ-13 delivers 4.4× higher peak power handling and integrated heatsink thermal performance essential for automotive load-dump compliance-making it the only option among the three validated for ISO16750-2 Pulse 5a in production ECUs.
Availability
DM8W26AQ-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply with full automotive qualification traceability.
Supply support for DM8W26AQ-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 with IATF 16949-certified facilities.
The DM8WxxAQ series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for ISO16750-2 and ISO7637-2 compliance in harsh-environment vehicle electronics, with emphasis on thermal robustness and AEC-Q101 reliability.
FAQ
What is the polarity configuration of DM8W26AQ-13?
The DM8W26AQ-13 is a unidirectional TVS diode with anode connected to the metal heatsink tab and cathode marked by a bar on the top surface. This configuration requires the heatsink to be tied to the positive rail (e.g., battery), while the cathode connects to the protected line. Reverse polarity connection will result in immediate failure under normal bias.
How does DM8W26AQ-13 perform under high-temperature operation?
DM8W26AQ-13 maintains full specification compliance from –55°C to +175°C junction temperature. At TJ = +175°C, reverse leakage remains ≤150 µA at VRWM, and clamping voltage increases by <5% versus room-temperature values-verified per AEC-Q101 thermal characterization tests.
Can DM8W26AQ-13 replace older DO-214AB TVS diodes in existing designs?
No direct drop-in replacement is possible due to different package (DO-218 vs. DO-214AB), thermal interface requirements, and pin layout. The DO-218's heatsink tab demands dedicated copper pour and mounting via thermal vias, unlike surface-only DO-214AB devices. Layout redesign and thermal validation are mandatory.
Is DM8W26AQ-13 compliant with China RoHS and REACH regulations?
Yes-DM8W26AQ-13 meets China RoHS II (SJ/T 11364-2014) Annex II concentration limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE, and complies with REACH SVHC thresholds (<0.1% w/w) as confirmed in Diodes Incorporated's material declarations (Doc #MD-0012 Rev. 8).
DM8W26AQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-218AB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 157A
- 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
DM8W26AQ-13 FAQ
1.How can I place an order for DM8W26AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W26AQ-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 DM8W26AQ-13 reliable?
The price and inventory of DM8W26AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W26AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W26AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W26AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W26AQ-13?
DM8W26AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W26AQ-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 DM8W26AQ-13?
For technical support, including DM8W26AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W26AQ-13 requirements.
6.How does Aetrix verify that DM8W26AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W26AQ-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 DM8W26AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W26AQ-13?
All DM8W26AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W26AQ-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 DM8W26AQ-13 part is unused and in its original packaging.
Return procedure for DM8W26AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W26AQ-13 Tags
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