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Diodes Incorporated DM8W20A-13
- Part No.:
- DM8W20A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W20A-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:4,953
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Product details
Overview
DM8W20A-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 power rail applications. It delivers 6600W peak pulse power (10/1000µs), clamps at 32.4V max under 204A peak pulse current, and operates across –55°C to +175°C with 0.9°C/W junction-to-case thermal resistance.
For engineers reviewing the DM8W20A-13 datasheet, DM8W20A-13 pinout, DM8W20A-13 application, or DM8W20A-13 equivalent, key selection criteria include its DO-218 package thermal performance, ISO16750-2 Pulse A/B compliance, 20V reverse standoff rating, and anode-heatsink polarity configuration for high-current PCB mounting.
Technical Context
This TVS diode employs a planar junction silicon avalanche structure optimized for fast response (<1 ns) to high-energy transients. Its unidirectional configuration provides low clamping voltage during reverse-biased surges while maintaining <10 µA leakage at 20V VRWM and 150 µA at TJ = +175°C.
The device is thermally engineered for direct heatsink attachment via its anode terminal, enabling sustained 8W average power dissipation at TC = +25°C and derated operation up to +175°C case temperature per Figure 1. Its DO-218 (Type E) package supports high-current surge handling without bond wire limitations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600W (10/1000µs waveform); enables suppression of severe automotive load dump events without failure |
| Reverse Standoff Voltage | 20V; sets minimum system operating voltage margin before clamping activation |
| Max Clamping Voltage | 32.4V @ 204A IPP; defines maximum voltage seen by protected downstream circuitry during surge |
| Junction Temperature Range | –55°C to +175°C; supports under-hood automotive deployment without derating |
| Thermal Resistance RθJC | 0.9°C/W; allows efficient heat transfer to heatsink, critical for sustained 8W average power handling |
| Leakage Current | ≤10 µA @ VRWM, ≤150 µA @ TJ = +175°C; ensures minimal standby power loss in battery-sensitive systems |
Pinout & Package
Package: DO-218 (Type E), molded plastic UL 94V-0 housing with matte tin-plated terminals; anode terminal serves as heatsink interface; cathode marked by bar symbol on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current return path and thermal interface | Must be soldered to large copper pour or external heatsink to maintain safe junction temperature under surge |
| Cathode | Surge current entry point | Connected to protected line (e.g., 12V/24V rail); clamps voltage when reverse-biased transient exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Supports full ISO16750-2 Load Dump Pulse A (12V system) without degradation or failure |
| TJ = +175°C Rating | Enables placement near high-temperature engine control units without thermal derating penalties |
| DO-218 Package Thermal Performance | 0.9°C/W RθJC enables >8W continuous power dissipation with minimal heatsink area |
| ISO7637-2 Compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a (battery disconnect), and Pulse 3a/b (capacitive coupling) |
Applications
| Automotive Engine Control Unit (ECU) | Commercial Vehicle Body Control Module (BCM) |
|---|---|
Use Scenario: Protects microcontroller power rails from alternator load dump surges during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery input and DC-DC converter input. Use Value: Limits transient voltage to ≤32.4V, preventing damage to 3.3V/5V LDOs and MCU I/O pins rated for 40V absolute max. |
Use Scenario: Shields LIN bus transceivers and sensor interfaces from ISO 7637-2 Pulse 1 and Pulse 2a transients in cab electronics. IC Role / Device Role / Timing Role: Primary rail-level surge suppressor on 12V supply feeding multiple distributed modules. Use Value: Maintains <10 µA leakage at 20V, avoiding battery drain in always-on vehicle subsystems. |
| Off-Highway Equipment Telematics Gateway | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards cellular modem and GNSS receiver power inputs against cranking-induced transients and generator switching noise. IC Role / Device Role / Timing Role: First-line defense on main 24V input before buck converters and PMICs. Use Value: 6600W rating handles extended-duration load dump pulses common in heavy-duty diesel systems. |
Use Scenario: Safeguards gate drivers and current sense amplifiers from inductive kickback during motor phase switching. IC Role / Device Role / Timing Role: Rail clamp on high-side driver VDD supply, mounted directly to metal chassis for thermal conduction. Use Value: Anode-as-heatsink design enables direct thermal coupling to EPS housing, sustaining 8W average dissipation during repeated 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 |
|---|---|---|---|
| SMAJ20A | Lower 400W PPK rating; SMA package; RθJC ≈ 50°C/W | Limited to low-energy ISO 7637-2 Pulse 3 only; unsuitable for load dump | Select only for cost-sensitive non-automotive consumer applications with <100A surge exposure |
| SMCJ20A | 3000W PPK; SMC package; RθJC ≈ 12°C/W; same 20V VRWM | Meets ISO 7637-2 Pulse 1/2a but fails Pulse A load dump per ISO16750-2 | Use where space constraints prevent DO-218 footprint but full 6600W capability is not required |
Compared with SMAJ20A and SMCJ20A, DM8W20A-13 uniquely satisfies both ISO16750-2 Pulse A (load dump) and ISO7637-2 Pulse 1–3b requirements in a thermally optimized DO-218 package, making it the only choice for under-hood automotive power rail protection demanding 6600W surge handling and +175°C operation.
Availability
DM8W20A-13 is available at Aetrix Electronics and suitable for automotive engine control units, commercial vehicle body control modules, and off-highway telematics gateways requiring stable component supply with AEC-Q200-aligned reliability.
Supply support for DM8W20A-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 protection, power management, and signal integrity solutions for automotive and industrial markets.
DM8W20A-13 belongs to the DM8WxxA series - a family of high-power, high-temperature TVS diodes engineered specifically for automotive load dump and ISO-compliant surge protection in harsh under-hood environments.
FAQ
What is the maximum clamping voltage of DM8W20A-13 at its rated peak pulse current?
The maximum clamping voltage VC is 32.4V at IPP = 204A for the 10/1000µs waveform, measured per JEDEC test conditions. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can DM8W20A-13 be used in bidirectional configurations?
No - DM8W20A-13 is specified and characterized only for unidirectional operation. Its electrical parameters, including breakdown voltage and clamping behavior, are defined for reverse-biased surge conditions. Bidirectional protection requires two devices or a dedicated bidirectional TVS such as the DM8W20CA series.
How is thermal management implemented for DM8W20A-13 in high-power applications?
Thermal management relies on direct conduction from the anode terminal (heatsink) to a PCB copper pour or external metal chassis. With RθJC = 0.9°C/W, a 25°C ambient and 8W average dissipation requires ≤18°C temperature rise above ambient - achievable using ≥250 mm² 2-oz copper area per side, per Diodes' recommended layout guidelines.
Is DM8W20A-13 compliant with automotive qualification standards?
Yes - DM8W20A-13 is qualified to AEC-Q200 Rev H for passive components and meets ISO16750-2 (Pulse A/B) and ISO7637-2 (Pulse 1/2a/3a/3b). It is also RoHS 3 compliant, halogen- and antimony-free, and rated for moisture sensitivity level 1 per J-STD-020.
DM8W20A-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 204A
- 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
DM8W20A-13 FAQ
1.How can I place an order for DM8W20A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W20A-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 DM8W20A-13 reliable?
The price and inventory of DM8W20A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W20A-13 is usually 5 days.
3.What payment methods are accepted for DM8W20A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W20A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W20A-13?
DM8W20A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W20A-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 DM8W20A-13?
For technical support, including DM8W20A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W20A-13 requirements.
6.How does Aetrix verify that DM8W20A-13 is sourced from the original manufacturer or authorized distributors?
All DM8W20A-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 DM8W20A-13 meets industry standards.
7.What is the process for return or replacement of DM8W20A-13?
All DM8W20A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W20A-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 DM8W20A-13 part is unused and in its original packaging.
Return procedure for DM8W20A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W20A-13 Tags
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