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Diodes Incorporated DM8W28A-13
- Part No.:
- DM8W28A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W28A-13.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:4,070
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Product details
Overview
DM8W28A-13 from Diodes Incorporated is a unidirectional 6600W surface-mount transient voltage suppressor (TVS) diode in DO-218 (Type E) package, rated for 28V reverse standoff voltage, 45.4V clamping voltage at 145A peak pulse current (10/1000µs), and 175°C junction temperature - designed for automotive load dump and ISO 7637-2 surge protection in powertrain and body control modules.
For engineers reviewing the DM8W28A-13 datasheet, DM8W28A-13 pinout, DM8W28A-13 application, or DM8W28A-13 equivalent, key selection criteria include its 6600W peak pulse power rating, unidirectional polarity, 0.9°C/W thermal resistance (junction-to-case), compliance with ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b, and qualification to AEC-Q standards for high-reliability automotive use.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive electronics, activating above its 28V VRWM to divert surge energy via low-impedance conduction. Its 31.1–34.4V breakdown range (at 5mA) ensures precise overvoltage triggering while maintaining <10µA leakage at rated voltage.
Thermal design relies on direct case-to-heatsink mounting (anode-side heatsink interface), enabled by its DO-218 package's low RθJC of 0.9°C/W and 8W steady-state power dissipation at TC = +25°C. Derating follows a linear curve to zero at +175°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600W (10/1000µs waveform) - handles severe automotive load dump surges without failure |
| Reverse Standoff Voltage | 28V - sets minimum system operating voltage threshold before clamping initiates |
| Clamping Voltage | 45.4V @ 145A - limits downstream voltage stress during worst-case transients |
| Junction Temperature Range | −55°C to +175°C - supports under-hood deployment in modern ICE and EV platforms |
| Thermal Resistance | 0.9°C/W (Junction-to-Case) - enables efficient heat transfer to heatsink for sustained surge handling |
| Surge Standards | ISO 16750-2 Pulse A/B & ISO 7637-2 Pulse 1/2a/3a/3b - certified for full automotive electrical environment compliance |
| Leakage Current | ≤10µA @ 28V, +25°C - minimizes standby power loss in always-on vehicle systems |
Pinout & Package
Package: DO-218 (Type E), molded plastic UL 94V-0 housing with matte tin-plated terminals; anode connected to heatsink surface, cathode marked by bar on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Surface) | Current return path & thermal interface | Must be soldered to copper pour or heatsink for effective thermal management and surge current return |
| Cathode (Top Marked Pin) | Transient voltage reference node | Connected to protected line (e.g., 12V rail); clamps to anode when voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Enables single-device protection against 12V automotive load dump events up to 100V/350A (exponential decay) |
| +175°C Junction Rating | Supports placement near high-temperature components (e.g., ECUs, inverters) without derating penalties |
| Unidirectional Polarity | Optimized for DC-biased systems like battery-fed 12V/24V rails - blocks reverse leakage while clamping positive transients |
| AEC-Q Qualified Reliability | Validated per JEDEC standards for automotive-grade lifetime and robustness in harsh environments |
| Lead-Free & Halogen-Free | Meets RoHS 3 and automotive green material requirements (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Power Rail |
|---|---|
Use Scenario: Protects microcontroller power supply from alternator load dump surges during battery disconnection. IC Role / Device Role / Timing Role: Clamping TVS placed between battery input and DC-DC converter input. Use Value: Limits transient voltage to ≤45.4V, preventing damage to 40V-rated input capacitors and LDOs. | Use Scenario: Shields 12V supply feeding isolated CAN transceivers from ISO 7637-2 Pulse 1 (inductive switch-off) noise. IC Role / Device Role / Timing Role: Parallel-connected surge absorber on VCC line upstream of CAN bus power conditioning. Use Value: Absorbs 388A-equivalent energy (per 10/1000µs test) without degradation across 100,000+ cycles. |
| Electric Power Steering (EPS) Motor Driver | ADAS Camera Module Power Input |
Use Scenario: Safeguards H-bridge gate drivers and current sense amplifiers from inductive kickback during motor shutdown. IC Role / Device Role / Timing Role: Mounted directly at motor driver power entry point with minimal trace inductance. Use Value: Achieves <1ns response time to clamp 60V spikes within 45.4V ceiling, preserving MOSFET SOA. | Use Scenario: Guards image sensor and ISP power rails against ESD and conducted transients in front-end camera housings. IC Role / Device Role / Timing Role: Final-stage protection before low-noise LDOs supplying CIS and SerDes ICs. Use Value: Maintains <10µA leakage at 28V to avoid dark current drift in CMOS sensors during sleep mode. |
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 400W peak power, SMA package, RθJC ≈ 45°C/W | Not suitable for load dump; limited to ESD and minor switching transients | Select only for non-automotive, low-energy circuits where space constraints prohibit DO-218 |
| SMCJ28A | 1500W peak power, SMC package, RθJC ≈ 10°C/W, same VRWM/clamp | Acceptable for ISO 7637-2 Pulse 3a/b but insufficient for Pulse 5a (load dump) | Choose when cost sensitivity outweighs full load dump compliance, and thermal margin allows higher RθJC |
Compared with SMAJ28A and SMCJ28A, DM8W28A-13 delivers 4.4× and 4.4× higher peak power respectively, enabling single-device compliance with ISO 16750-2 Pulse 5a - critical for engine bay placements where multi-stage protection adds BOM cost and layout complexity.
Availability
DM8W28A-13 is available at Aetrix Electronics and suitable for automotive powertrain control units, body electronics modules, electric power steering systems, and ADAS camera power supplies requiring stable component supply across extended production lifecycles.
Supply support for DM8W28A-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 manufacturing and testing facilities across Asia and North America.
The DM8WxxA series belongs to Diodes' high-power automotive TVS portfolio, engineered specifically to meet stringent ISO 16750-2 and ISO 7637-2 surge immunity requirements for 12V/24V vehicle electrical systems.
FAQ
What is the maximum clamping voltage of DM8W28A-13 at its rated peak pulse current?
The DM8W28A-13 clamps to a maximum of 45.4V when subjected to its rated 145A peak pulse current under the standard 10/1000µs waveform. This value is guaranteed across the full operating temperature range and reflects worst-case device variation per the datasheet's electrical characteristics table.
Can DM8W28A-13 be used in bidirectional configurations?
No - DM8W28A-13 is a unidirectional TVS diode with anode tied to the heatsink surface and cathode marked externally. It conducts only during positive transients relative to the anode. For bidirectional protection, two devices must be connected in series opposition or a dedicated bidirectional part (e.g., DM8W28CA) must be selected.
How does the DO-218 package improve thermal performance over SMA or SMC packages?
The DO-218 (Type E) package features a large metalized anode surface that serves as both electrical terminal and thermal interface, achieving RθJC = 0.9°C/W - over 10× better than SMAJ28A (≈12°C/W) and ~11× better than SMCJ28A (≈10°C/W). This enables direct heatsink mounting for sustained surge energy dissipation.
Is DM8W28A-13 compliant with AEC-Q200 stress testing requirements?
Yes - DM8W28A-13 is qualified to JEDEC standards referenced in AEC-Q200 for passive components, including temperature cycling, humidity bias, and surge endurance testing. Its automotive-compliant variant (DM8W28AQ-13) carries explicit AEC-Q200 certification; the standard DM8W28A-13 shares identical die and construction.
DM8W28A-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
DM8W28A-13 FAQ
1.How can I place an order for DM8W28A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W28A-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 DM8W28A-13 reliable?
The price and inventory of DM8W28A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W28A-13 is usually 5 days.
3.What payment methods are accepted for DM8W28A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W28A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W28A-13?
DM8W28A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W28A-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 DM8W28A-13?
For technical support, including DM8W28A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W28A-13 requirements.
6.How does Aetrix verify that DM8W28A-13 is sourced from the original manufacturer or authorized distributors?
All DM8W28A-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 DM8W28A-13 meets industry standards.
7.What is the process for return or replacement of DM8W28A-13?
All DM8W28A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W28A-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 DM8W28A-13 part is unused and in its original packaging.
Return procedure for DM8W28A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W28A-13 Tags
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