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Diodes Incorporated DM8W43A-13
- Part No.:
- DM8W43A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W43A-13.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:8,283
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Product details
Overview
DM8W43A-13 from Diodes Incorporated is a unidirectional surface-mount transient voltage suppressor (TVS) designed for automotive load dump and ISO 7637-2 surge protection in high-reliability 12 V/24 V systems. It delivers 6600 W peak pulse power (10/1000 µs), clamps at 69.4 V @ 95.1 A, and operates from –55 °C to +175 °C with 0.9 °C/W junction-to-case thermal resistance.
For engineers reviewing the DM8W43A-13 datasheet, DM8W43A-13 pinout, DM8W43A-13 application, or DM8W43A-13 equivalent, this device is selected for high-energy transient suppression in engine control units, body control modules, and ADAS power rails where robustness against ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b surges is mandatory.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transients above its 43 V reverse standoff voltage (VRWM). Its 47.8–52.8 V breakdown range (VBR @ 5 mA) ensures precise triggering while maintaining low leakage (<10 µA @ VRWM) across temperature.
Thermal design is enabled by its DO-218 package with direct heatsink mounting (anode-side thermal path), supporting 8 W steady-state dissipation at TC = +25 °C and derating to ~5200 W at TA = +100 °C per Fig. 1. The 10/1000 µs waveform rating reflects standardized load-dump surge testing per ISO 16750-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600 W (10/1000 µs); handles full automotive load dump energy without failure |
| Reverse Standoff Voltage | 43 V; sets minimum system operating voltage margin before clamping activates |
| Clamping Voltage | 69.4 V @ 95.1 A; limits downstream IC stress during worst-case ISO 16750-2 Pulse A |
| Junction Temperature Range | –55 °C to +175 °C; qualified for under-hood automotive environments |
| Thermal Resistance (Junction-to-Case) | 0.9 °C/W; enables efficient heat transfer to PCB copper or external heatsink |
| Surge Current (IFSM) | 700 A (8.3 ms half-sine); withstands repetitive load dump events with ≤4 pulses/min duty cycle |
| Leakage Current | <10 µA @ 43 V, +175 °C; prevents battery drain in always-on vehicle modules |
Pinout & Package
Package: DO-218 (Type E), surface-mount, anode-heatsink configuration. Cathode marked by bar on top surface; anode connected to heatsink tab for low-inductance thermal and electrical path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current return path & thermal interface | Must be soldered to ≥200 mm² copper pour or external heatsink for rated power handling |
| Cathode (Top Lead) | Transient current entry point | Connected to protected line (e.g., battery rail); clamps to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | Qualified per AEC-Q standards; meets ISO 16750-2 and ISO 7637-2 surge requirements |
| High-temperature stability | Rated operation up to +175 °C junction; leakage remains <150 µA at max temp |
| Lead-free & green compliance | RoHS 3 compliant; halogen- and antimony-free (Br+Cl <1500 ppm, Sb <1000 ppm) |
| Unidirectional polarity | Optimized for DC power rail protection only; no reverse-bias conduction risk |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protects microcontroller power supply from alternator load dump surges during battery disconnection. IC Role / Device Role / Timing Role: Primary clamping device on 12 V main rail; absorbs >6 kW transient energy within 10 ms. Use Value: Prevents reset or latch-up of ASIL-B MCUs by limiting rail voltage to ≤69.4 V during ISO 16750-2 Pulse A. |
Use Scenario: Shields LIN bus transceivers and door module drivers from ISO 7637-2 Pulse 3b capacitive coupling noise. IC Role / Device Role / Timing Role: Fast-response shunt protector on 12 V auxiliary rail feeding multiple low-power ICs. Use Value: Maintains <10 µA leakage at +175 °C, eliminating standby current penalty in always-on BCM sleep modes. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Safeguards camera sensor power inputs against coupled transients from adjacent high-current actuators. IC Role / Device Role / Timing Role: Secondary protection stage after upstream fuse and LC filter; clamps residual spikes. Use Value: 69.4 V clamping ensures image sensor ICs (rated to 70 V abs max) remain within safe operating area. |
Use Scenario: Guards motor driver gate supplies from back-EMF spikes during EPS motor commutation. IC Role / Device Role / Timing Role: High-current TVS placed at H-bridge power stage input to absorb inductive kickback. Use Value: 700 A IFSM rating supports repeated 8.3 ms surges without degradation-critical for steering torque responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Lower PPK (400 W), DO-214AC package, RθJC ≈ 45 °C/W | Not suitable for load dump; limited to low-energy ISO 7637-2 Pulse 3a/3b only | Select when cost sensitivity outweighs surge energy requirement and board space allows larger thermal pad |
| SMCJ43A | PPK = 1500 W, DO-214AB package, RθJC ≈ 12 °C/W | Handles moderate surges but fails ISO 16750-2 Pulse A; requires larger heatsinking than DM8W43A | Choose for non-automotive industrial 24 V systems where full load dump immunity is not mandated |
Compared with SMAJ43A and SMCJ43A, DM8W43A-13 provides 4.4× and 4.4× higher peak power respectively, achieves 50× lower thermal resistance via DO-218 heatsink mounting, and is the only one fully compliant with ISO 16750-2 Pulse A-making it the sole option for modern automotive power rail protection.
Availability
DM8W43A-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS domain controllers, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for DM8W43A-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.
DM8W43A-13 belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically for ISO 16750-2 and ISO 7637-2 compliance in harsh under-hood environments.
FAQ
What is the maximum clamping voltage of DM8W43A-13 at its rated peak pulse current?
The DM8W43A-13 clamps to 69.4 V when subjected to its maximum peak pulse current of 95.1 A under the standard 10/1000 µs waveform. This value is measured per test conditions in the DS40428 datasheet and guarantees protection of downstream 70 V-rated ICs during ISO 16750-2 Pulse A events.
Can DM8W43A-13 be used in bidirectional configurations?
No. DM8W43A-13 is unidirectional only, with the anode designated as the heatsink tab and cathode as the top lead. Its electrical structure does not support reverse-biased conduction; using it in AC or bipolar signal paths will result in forward conduction and failure.
How does the DO-218 package improve thermal performance over DO-214AB?
The DO-218 package features a large metal heatsink tab directly bonded to the silicon die's anode, achieving 0.9 °C/W junction-to-case thermal resistance-over 13× better than typical DO-214AB devices (~12 °C/W). This allows sustained 8 W power dissipation at TC = +25 °C without external heatsinks.
Is there a qualified automotive variant of DM8W43A-13?
Yes-the DM8W43AQ-13 is the AEC-Q200 qualified version, documented in a separate datasheet. It undergoes additional stress testing including temperature cycling, humidity bias, and mechanical shock, making it suitable for safety-critical ASIL-B/C applications where DM8W43A-13 may not be approved.
DM8W43A-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
DM8W43A-13 FAQ
1.How can I place an order for DM8W43A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W43A-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 DM8W43A-13 reliable?
The price and inventory of DM8W43A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W43A-13 is usually 5 days.
3.What payment methods are accepted for DM8W43A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W43A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W43A-13?
DM8W43A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W43A-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 DM8W43A-13?
For technical support, including DM8W43A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W43A-13 requirements.
6.How does Aetrix verify that DM8W43A-13 is sourced from the original manufacturer or authorized distributors?
All DM8W43A-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 DM8W43A-13 meets industry standards.
7.What is the process for return or replacement of DM8W43A-13?
All DM8W43A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W43A-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 DM8W43A-13 part is unused and in its original packaging.
Return procedure for DM8W43A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W43A-13 Tags
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