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Diodes Incorporated DM8W22A-13
- Part No.:
- DM8W22A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W22A-13.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:5,921
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Product details
Overview
DM8W22A-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 12V/24V systems. It delivers 6600W peak pulse power (10/1000µs), clamps at ≤35.5V under 186A peak current, and operates from –55°C to +175°C - deployed in engine control units, body control modules, and infotainment power rails.
For engineers reviewing the DM8W22A-13 datasheet, DM8W22A-13 pinout, DM8W22A-13 application, or DM8W22A-13 equivalent, key selection criteria include reverse standoff voltage (22V), clamping voltage (≤35.5V @ 186A), thermal resistance (0.9°C/W), unidirectional polarity, and DO-218 package compatibility with high-current PCB heatsinking.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transient overvoltages above its 22V standoff threshold. Its low RθJC (0.9°C/W) enables efficient heat transfer to the PCB heatsink, supporting sustained operation up to TJ = +175°C - critical for under-hood automotive environments.
The device meets ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b waveforms without derating below +25°C. Its 186A peak pulse current rating (10/1000µs) and 700A IFSM (8.3ms half-sine) ensure robustness against battery load dump events in 24V commercial vehicle systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600W (10/1000µs) - withstands severe automotive load dump surges without failure |
| Reverse Standoff Voltage | 22V - blocks normal system voltage while triggering only during transients ≥24.4V |
| Clamping Voltage | ≤35.5V @ 186A - limits downstream IC voltage stress during worst-case surge |
| Peak Forward Surge Current | 700A (8.3ms half-sine) - handles high-energy single-event load dump without bond wire fusing |
| Thermal Resistance | 0.9°C/W (Junction-to-Case) - enables direct PCB copper heatsinking for stable high-temp operation |
| Operating Temperature | –55°C to +175°C - qualified for under-hood placement in engine management and transmission control |
| Leakage Current | ≤10µA @ 22V, +175°C - ensures minimal standby power loss in hot-cranking conditions |
Pinout & Package
Package: DO-218 (Type E), molded plastic UL 94V-0 housing with matte tin-plated terminals; heatsink tab serves as anode terminal; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current return path & thermal interface | Must be soldered to ≥250mm² copper pour for effective heat dissipation and surge current conduction |
| Cathode (Top Surface Bar) | Transient current entry point | Connected to protected line (e.g., 24V rail); clamps to anode when voltage exceeds 24.4V |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Enables single-device protection against ISO 16750-2 Load Dump (Pulse 5a) in 24V systems without parallel stacking |
| TJ = +175°C Rating | Supports placement near heat sources (e.g., power converters) without thermal shutdown or parameter drift |
| DO-218 Package with Heatsink Tab | Provides low-inductance, high-current path and direct thermal coupling to PCB - reduces clamping overshoot vs. SMC/SMB |
| ISO 7637-2 & ISO 16750-2 Compliance | Validated for full automotive surge immunity testing - eliminates need for external waveform validation in Tier 1 qualification |
Applications
| Engine Control Unit (ECU) Power Input | Commercial Vehicle Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 24V supply input of diesel engine ECUs exposed to alternator load dump during battery disconnect. IC Role / Device Role: Primary clamping element shunting surge energy to chassis ground via heatsink tab. Use Value: Clamps 120V/186A load dump transients to ≤35.5V, preventing damage to MCU, CAN transceivers, and analog sensors. | Use Scenario: Shields BCM power rail from ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (capacitive discharge) in heavy-duty truck lighting circuits. IC Role / Device Role: Unidirectional TVS placed between fused 24V rail and local DC/DC converter input. Use Value: Limits voltage excursions to <35.5V at 186A, ensuring uninterrupted operation of LIN gateways and relay drivers. |
| Off-Highway Equipment Telematics Hub | Hybrid Powertrain DC-Link Protection |
Use Scenario: Safeguards GPS/GSM modem power input in construction equipment subject to cranking surges and generator ripple. IC Role / Device Role: First-line transient suppressor upstream of LDO regulators and PMICs. Use Value: Maintains <10µA leakage at +175°C, minimizing quiescent current drain during extended parking modes. | Use Scenario: Protects bidirectional DC-link monitoring circuitry in 48V mild hybrid systems during regenerative braking transients. IC Role / Device Role: Clamp device referenced to high-side DC-link potential with heatsink tied to isolated thermal plane. Use Value: Withstands 700A IFSM (8.3ms) without degradation - critical for repeated brake energy recapture events. |
Availability
DM8W22A-13 is available at Aetrix Electronics and suitable for automotive engine control units, commercial vehicle body control modules, and off-highway telematics hubs requiring stable component supply across long production lifecycles.
Supply support for DM8W22A-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, industrial, and computing markets.
The DM8WxxA series belongs to Diodes' AEC-Q200-qualified automotive TVS portfolio, engineered specifically for load dump and ISO 7637-2 surge immunity in harsh-environment 12V/24V/48V power systems.
FAQ
What is the polarity configuration of DM8W22A-13?
DM8W22A-13 is unidirectional: the heatsink tab is the anode, and the top-surface bar-marked terminal is the cathode. It conducts only during positive transients on the cathode relative to anode - ideal for protecting positive-rail systems where reverse voltage is not expected.
How does DM8W22A-13 differ from the automotive-qualified DM8W22AQ-13?
DM8W22AQ-13 is identical in electrical and thermal performance but undergoes additional AEC-Q200 stress testing (including temperature cycling, HTRB, and UHAST) and is traceable to automotive-grade wafer lots. The standard DM8W22A-13 meets ISO standards but lacks full AEC-Q200 certification documentation.
Can DM8W22A-13 be used in 12V systems?
Yes - its 22V reverse standoff voltage provides adequate margin above nominal 12V battery systems (13.5V typical), while its 35.5V clamping voltage remains compatible with 36V-rated downstream components such as automotive MCUs and CAN transceivers.
What PCB layout practices maximize thermal performance?
Solder the anode (heatsink tab) to ≥250mm² of 2oz copper connected to internal ground or thermal planes. Use ≥8 thermal vias (0.3mm diameter) under the tab, spaced ≤1.5mm apart, to transfer heat to inner layers. Avoid narrow traces between cathode pad and protected line to minimize inductive overshoot.
DM8W22A-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 186A
- 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
DM8W22A-13 FAQ
1.How can I place an order for DM8W22A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W22A-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 DM8W22A-13 reliable?
The price and inventory of DM8W22A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W22A-13 is usually 5 days.
3.What payment methods are accepted for DM8W22A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W22A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W22A-13?
DM8W22A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W22A-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 DM8W22A-13?
For technical support, including DM8W22A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W22A-13 requirements.
6.How does Aetrix verify that DM8W22A-13 is sourced from the original manufacturer or authorized distributors?
All DM8W22A-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 DM8W22A-13 meets industry standards.
7.What is the process for return or replacement of DM8W22A-13?
All DM8W22A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W22A-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 DM8W22A-13 part is unused and in its original packaging.
Return procedure for DM8W22A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W22A-13 Tags
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