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Diodes Incorporated DM8W43AQ-13
- Part No.:
- DM8W43AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W43AQ-13.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:9,971
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Product details
Overview
DM8W43AQ-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 43 V reverse standoff voltage, 69.4 V clamping voltage at 95.1 A peak pulse current (10/1000 µs), 6600 W peak pulse power, and DO-218 (Type E) package with anode-heatsink polarity. It is qualified to AEC-Q101 and rated for operation from –55°C to +175°C.
For engineers reviewing the DM8W43AQ-13 datasheet, DM8W43AQ-13 pinout, DM8W43AQ-13 application, or DM8W43AQ-13 equivalent, key selection criteria include clamping performance under ISO16750-2 Pulse 5a (load dump), thermal resistance (0.9 °C/W junction-to-case), high-temperature stability up to TJ = +175°C, and compliance with RoHS, halogen-free, and IATF 16949 manufacturing requirements.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped crowbar device during transients, conducting surge current from cathode to anode when reverse voltage exceeds breakdown (47.8–52.8 V). Its glass-passivated die and low RθJC (0.9 °C/W) enable rapid heat dissipation into the heatsink-mounted anode terminal during 10 ms exponential load-dump events.
It meets ISO16750-2 Pulse 5a (load dump) with 6600 W capability at TC = +25°C and retains >5200 W at elevated case temperatures per Fig. 1 derating curve. Capacitance is 36 pF at 43 V (f = 1 MHz), confirming suitability for DC power rail protection without signal integrity impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 43 V - Maximum continuous reverse operating voltage before leakage exceeds 10 µA; sets minimum system bus rating for compatibility with 36 V nominal automotive architectures. |
| VC @ IPP | 69.4 V @ 95.1 A (10/1000 µs) - Clamping voltage limits downstream IC stress during ISO7637-2 Pulse 1/2a/3a/3b and ISO16750-2 Pulse 5a surges. |
| PPK | 6600 W - Peak non-repetitive power handling for 10/1000 µs waveform; supports single-event load-dump suppression without failure. |
| RθJC | 0.9 °C/W - Enables effective thermal coupling to PCB copper pour or heatsink; critical for sustaining 8 W average power at TC = +25°C. |
| TJ Range | –55°C to +175°C - Full operational range validated per AEC-Q101; ensures reliability in under-hood environments including engine control units and battery management systems. |
| Capacitance | 36 pF @ 43 V, 1 MHz - Low parasitic capacitance avoids interference with CAN, LIN, or sensor signal lines when placed on shared power rails. |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), 2.74 g weight. Anode is connected to the heatsink tab; cathode is marked by bar symbol on top view. Polarity must be observed during PCB layout to ensure proper thermal path and surge conduction direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Surge Current Return Path & Thermal Interface | Primary heat extraction surface; must be soldered to ≥200 mm² copper pour for rated 6600 W pulse handling and thermal stability. |
| Cathode (Lead) | Transient Voltage Input Node | Connected to protected line (e.g., alternator output); conducts surge current to anode during overvoltage events above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 6600 W Peak Pulse Power | Validated for single-event ISO16750-2 Pulse 5a (load dump) suppression without degradation, enabling robust front-end protection in 12/24/48 V vehicle architectures. |
| AEC-Q101 Qualified & PPAP Capable | Manufactured in IATF 16949-certified facilities with full change control-required for Tier 1 automotive ECUs and safety-critical power modules. |
| Glass-Passivated Die Construction | Eliminates moisture ingress risk and improves long-term reliability under thermal cycling (–55°C to +175°C), critical for under-hood deployment. |
| Lead-Free, Halogen-Free, RoHS 3 Compliant | Meets EU Directive 2015/863/EU with Br+Cl <1500 ppm and Sb <1000 ppm-ensures environmental compliance for global OEM supply chains. |
Applications
| Engine Control Unit (ECU) Power Input | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
|
Use Scenario: Protects 48 V input stage of diesel/gasoline engine control units against alternator load-dump transients (ISO16750-2 Pulse 5a) and ISO7637-2 coupled noise. IC Role / Device Role: Primary clamping element on main power rail upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤69.4 V during 10 ms load dump, preventing latch-up or permanent damage to 75 V-rated power management ICs. |
Use Scenario: Shields 12 V power supply of surround-view camera modules from battery line surges during jump-start or relay switching (ISO7637-2 Pulse 2a). IC Role / Device Role: Unidirectional TVS placed between fuse output and buck regulator input. Use Value: 36 pF capacitance avoids distortion of 100+ Mbps LVDS video signals; 95.1 A IPP handles worst-case 200 A surge currents. |
| Electric Power Steering (EPS) Motor Driver | On-Board Charger (OBC) DC Link |
|
Use Scenario: Guards gate driver power rails in 48 V EPS inverters against inductive kickback and battery reversal-induced transients. IC Role / Device Role: Secondary surge clamp parallel to bulk capacitor, coordinated with primary TVS for multi-level protection. Use Value: +175°C operation ensures stable clamping during sustained motor stall conditions where ambient exceeds 125°C. |
Use Scenario: Suppresses switching transients on the high-voltage DC link (up to 450 V) of bidirectional OBCs during AC/DC and DC/AC mode transitions. IC Role / Device Role: Pre-regulator stage protector on auxiliary 12 V control rail fed from HV DC-DC converter. Use Value: 0.9 °C/W RθJC allows direct mounting to aluminum heatsink, maintaining <125°C junction temperature during repeated 500 ms surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Lower PPK (400 W), SMA package (RθJC ≈ 45 °C/W), 69.4 V VC @ 5.8 A | Not suitable for load-dump; limited to ISO7637-2 Pulse 1/2a only due to power/thermal constraints. | Select only for cost-sensitive, non-automotive 12 V systems with sub-100 A surge requirements. |
| SM8S43A | Same DO-218 package, 6600 W rating, but VBR = 47.8–52.8 V (identical), VC = 69.4 V @ 95.1 A (identical) | Functionally identical clamping behavior; differs only in qualification status (SM8S43A is AEC-Q101 qualified but not explicitly PPAP-capable in public docs) | Prefer DM8W43AQ-13 when full PPAP documentation and IATF 16949 traceability are contractually required. |
Compared with SMAJ43A and SM8S43A, DM8W43AQ-13 uniquely combines AEC-Q101 qualification, PPAP capability, and documented IATF 16949 manufacturing-making it the only choice for Tier 1 automotive programs requiring full production part approval and change control.
Availability
DM8W43AQ-13 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, electric power steering systems, and on-board chargers requiring stable component supply across extended automotive product lifecycles.
Supply support for DM8W43AQ-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 DM8W series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for ISO16750-2 and ISO7637-2 compliance in harsh-environment vehicle subsystems-including powertrain, chassis, and electrification systems.
FAQ
What is the maximum clamping voltage of DM8W43AQ-13 under standard test conditions?
The maximum clamping voltage is 69.4 V, measured at 95.1 A peak pulse current using the 10/1000 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (–55°C to +175°C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Can DM8W43AQ-13 be used in bidirectional surge protection configurations?
No. DM8W43AQ-13 is a unidirectional TVS diode with anode-heatsink polarity. It conducts only during reverse-biased overvoltage events. For bidirectional protection, two devices must be connected in series opposing configuration-or a dedicated bidirectional TVS such as the D3V3M43Q should be selected.
How does the DO-218 (Type E) package improve thermal performance compared to SMA or SMB packages?
The DO-218 package integrates a large metal heatsink tab directly bonded to the anode, achieving RθJC = 0.9 °C/W-over 40× lower than SMA packages (~45 °C/W). This enables efficient heat transfer to PCB copper or external heatsinks, sustaining 6600 W pulses without thermal runaway in automotive under-hood environments.
Is DM8W43AQ-13 compliant with China RoHS and REACH regulations?
Yes. DM8W43AQ-13 meets China RoHS II (SJ/T 11364-2014) with lead content <1000 ppm and total bromine + chlorine <1500 ppm. It also complies with EU REACH SVHC thresholds (<0.1% w/w) for all listed substances, as verified in Diodes Incorporated's material declarations (Doc #MD-001-RevG).
DM8W43AQ-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 95.1A
- 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
DM8W43AQ-13 FAQ
1.How can I place an order for DM8W43AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W43AQ-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 DM8W43AQ-13 reliable?
The price and inventory of DM8W43AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W43AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W43AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W43AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W43AQ-13?
DM8W43AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W43AQ-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 DM8W43AQ-13?
For technical support, including DM8W43AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W43AQ-13 requirements.
6.How does Aetrix verify that DM8W43AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W43AQ-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 DM8W43AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W43AQ-13?
All DM8W43AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W43AQ-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 DM8W43AQ-13 part is unused and in its original packaging.
Return procedure for DM8W43AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W43AQ-13 Tags
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