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Diodes Incorporated DM5W20A-13
- Part No.:
- DM5W20A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W20A-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:5,931
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Product details
Overview
DM5W20A-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 20 V reverse standoff voltage (VRWM), 32.4 V maximum clamping voltage (VC) at 111 A peak pulse current (IPP), and 3600 W peak pulse power dissipation (10/1000 µs). It is qualified to AEC-Q standards and housed in a DO-218 (Type E) package for high-reliability under-hood applications.
For engineers reviewing the DM5W20A-13 datasheet, DM5W20A-13 pinout, DM5W20A-13 application, or DM5W20A-13 equivalent, this part supports critical automotive circuit protection against ISO16750-2 load dump surges and ISO7637-2 transients - with verified thermal resistance (RθJC = 1.1 °C/W), low leakage (<10 µA @ VRWM), and high-temperature operation up to +175 °C.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, with anode connected to heatsink and cathode marked by bar. Its breakdown voltage (VBR) is specified at 22.2–24.5 V (min/max) with 5 mA test current, ensuring precise overvoltage triggering before system damage occurs.
The device delivers 3600 W peak pulse power handling per 10/1000 µs waveform and sustains 500 A non-repetitive forward surge current (IFSM) at 8.3 ms. Thermal design is enabled by low junction-to-case resistance (1.1 °C/W) and rated steady-state power dissipation of 5.0 W at TC = +25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 20 V - Maximum continuous reverse operating voltage before clamping begins. |
| VBR (min/max) | 22.2 / 24.5 V @ 5 mA - Ensures reliable, repeatable avalanche turn-on within tight tolerance. |
| VC @ IPP | 32.4 V @ 111 A (10/1000 µs) - Limits downstream voltage stress during worst-case surge events. |
| PPK | 3600 W - Handles high-energy automotive load dump pulses without failure. |
| RθJC | 1.1 °C/W - Enables effective thermal coupling to PCB copper or heatsink for sustained power handling. |
| TJ Range | −55 °C to +175 °C - Supports under-hood placement in modern engine control units and ADAS modules. |
| IR @ VRWM | <10 µA - Minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
Pinout & Package
Package: DO-218 (Type E), surface-mount, molded plastic housing with UL 94V-0 flammability rating. Anode terminal connects to heatsink (case); cathode identified by bar marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Electrically and thermally coupled to PCB ground plane or metal heatsink for low-inductance surge path and thermal dissipation. |
| Cathode (Bar-marked) | Clamped output node | Connected to protected line (e.g., 12 V rail); voltage rises no higher than VC during surge, limiting IC stress. |
Key Features
| Feature | Design Value |
|---|---|
| 3600 W peak pulse power | Withstands full ISO16750-2 load dump energy (≥300 J) without degradation when properly mounted. |
| Low RθJC (1.1 °C/W) | Enables >4× higher sustained power capability vs. standard SMC packages under identical thermal conditions. |
| AEC-Q qualified | Validated for automotive use per JEDEC reliability standards - including temperature cycling, HAST, and bond strength testing. |
| Halogen- and antimony-free | Meets automotive green material requirements (<900 ppm Br/Cl, <1000 ppm Sb), supporting OEM sustainability mandates. |
Applications
| Engine Control Unit (ECU) Power Input | ADAS Camera Module Supply Rail |
|---|---|
|
Use Scenario: Protects 12 V input of engine control unit against alternator load dump surges (up to 35 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of DC/DC converter input. Use Value: Limits transient voltage to ≤32.4 V, preventing damage to buck controller ICs and microcontrollers rated for 36 V max. |
Use Scenario: Shields 5 V or 3.3 V camera module supply derived from vehicle battery via LDO or buck regulator. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated rail to suppress coupled transients from nearby switching loads. Use Value: Low leakage (<10 µA) avoids loading sensitive LDO feedback networks; fast response preserves image sensor timing integrity. |
| Body Control Module (BCM) LIN Bus Interface | Infotainment Head Unit Power Entry |
|
Use Scenario: Guards LIN transceiver VCC pin against battery line transients induced by relay switching or motor commutation. IC Role / Device Role / Timing Role: Localized clamping adjacent to transceiver IC, minimizing trace inductance. Use Value: DO-218 package provides lower parasitic inductance than SMB/SMA, preserving signal edge fidelity on 19.2 kbps LIN bus. |
Use Scenario: Secures main 12 V input of infotainment head unit against cranking spikes and jump-start overvoltages. IC Role / Device Role / Timing Role: Primary front-end surge protector before fuse and EMI filter stage. Use Value: 500 A IFSM rating ensures survival during repeated jump-start events; RoHS/Green compliance meets Tier-1 OEM sourcing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower PPK (600 W), SMA package, RθJC ≈ 3.5 °C/W | Not suitable for ISO16750-2 load dump; limited to ISO7637-2 Pulse 1/2a only | Select when cost sensitivity outweighs surge energy requirement and thermal constraints allow. |
| SMCJ20A | PPK = 1500 W, SMC package, RθJC ≈ 2.0 °C/W, same VRWM | Passes ISO7637-2 but fails ISO16750-2 load dump due to insufficient energy absorption | Choose where board space permits larger SMC footprint and application does not require full 3600 W rating. |
Compared with SMBJ20A and SMCJ20A, DM5W20A-13 uniquely satisfies both ISO16750-2 load dump and ISO7637-2 surge immunity in a compact DO-218 package - delivering 2.4× more peak power than SMCJ20A and 6× more than SMBJ20A while maintaining superior thermal performance for under-hood deployment.
Availability
DM5W20A-13 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and infotainment systems requiring stable component supply across extended production lifecycles.
Supply support for DM5W20A-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.
DM5W20A-13 belongs to Diodes' automotive-grade TVS diode family engineered specifically for ISO16750-2 and ISO7637-2 compliance - emphasizing robust surge immunity, AEC-Q qualification, and thermal efficiency in harsh under-hood environments.
FAQ
What is the polarity configuration of DM5W20A-13?
The DM5W20A-13 is a unidirectional TVS diode with anode connected to the heatsink (case) and cathode marked by a bar on the top surface. This configuration requires the anode to be tied to the protected circuit's ground or low-side reference, and the cathode to the line being protected - enabling clamping only during positive transients relative to ground.
Can DM5W20A-13 replace SMF20A in an existing design?
No - SMF20A has only 200 W peak power and uses SOD-123 packaging, making it unsuitable for load dump protection. DM5W20A-13 delivers 3600 W and requires DO-218 footprint and thermal management. Direct replacement would risk catastrophic failure during ISO16750-2 events due to insufficient energy handling and thermal derating.
Is DM5W20A-13 compliant with AEC-Q200?
DM5W20A-13 is qualified to JEDEC standards referenced in AEC-Q200 for high-reliability automotive use, including temperature cycling, humidity testing, and mechanical shock. It is explicitly listed in Diodes' AEC-Q200 qualified product list and carries the "Q" suffix variant (DM5W20AQ-13) for fully documented automotive qualification.
What is the recommended PCB layout for optimal thermal performance?
For optimal thermal performance, use ≥25 mm² of 2-oz copper connected directly to the anode (heatsink) pad, with ≥4 thermal vias (0.3 mm diameter, filled or plated) connecting to inner or backside ground planes. Maintain minimum 0.5 mm clearance from adjacent components and avoid solder mask over heatsink pad to maximize conduction.
DM5W20A-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):
- 111A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
DM5W20A-13 FAQ
1.How can I place an order for DM5W20A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W20A-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 DM5W20A-13 reliable?
The price and inventory of DM5W20A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W20A-13 is usually 5 days.
3.What payment methods are accepted for DM5W20A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W20A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W20A-13?
DM5W20A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W20A-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 DM5W20A-13?
For technical support, including DM5W20A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W20A-13 requirements.
6.How does Aetrix verify that DM5W20A-13 is sourced from the original manufacturer or authorized distributors?
All DM5W20A-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 DM5W20A-13 meets industry standards.
7.What is the process for return or replacement of DM5W20A-13?
All DM5W20A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W20A-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 DM5W20A-13 part is unused and in its original packaging.
Return procedure for DM5W20A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W20A-13 Tags
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