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Diodes Incorporated DM8W22AQ-13
- Part No.:
- DM8W22AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM8W22AQ-13.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
DM8W22AQ-13 from Diodes Incorporated is a surface-mount transient voltage suppressor (TVS) diode designed for automotive load-dump and surge protection in high-reliability 12V/24V systems. It delivers 6600W peak pulse power (10/1000µs), has a 22V reverse standoff voltage (VRWM), clamps at ≤35.5V under 186A peak pulse current, and operates from –55°C to +175°C - enabling robust protection of engine control units, body control modules, and ADAS power rails.
For engineers reviewing the DM8W22AQ-13 datasheet, DM8W22AQ-13 pinout, DM8W22AQ-13 application, or DM8W22AQ-13 equivalent, key selection criteria include ISO 16750-2 Pulse A/B and ISO 7637-2 Pulse 1/2a/3a/3b compliance, DO-218 (Type E) package thermal performance (RθJC = 0.9°C/W), and AEC-Q101 qualification for automotive-grade deployment.
Technical Context
This unidirectional TVS diode uses glass-passivated silicon construction with anode-connected heatsink configuration, optimized for high-energy transients in automotive power networks. Its 22V VRWM aligns with nominal 24V battery systems, while its 35.5V clamping voltage at 186A ensures downstream ICs remain within safe operating limits during load-dump events.
The device exhibits excellent high-temperature stability up to TJ = +175°C and maintains low leakage (<150µA at VRWM, TJ = +175°C). Its DO-218 (Type E) package enables direct mounting to PCB copper pour for efficient heat dissipation, supporting sustained 8W average power dissipation at TC = +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 6600W (10/1000µs waveform); sustains ISO 16750-2 load-dump surges without failure |
| Reverse Standoff Voltage | 22V; blocks normal 24V system operation while remaining fully inactive below threshold |
| Clamping Voltage | ≤35.5V @ 186A; limits voltage seen by protected circuitry during worst-case transient |
| Operating Temperature | –55°C to +175°C; supports under-hood placement in modern ICE and EV powertrain modules |
| Thermal Resistance | RθJC = 0.9°C/W; enables effective heat transfer to PCB heatsink for continuous reliability |
| AEC-Q101 Qualified | Yes; certified for automotive applications with PPAP capability and IATF 16949 manufacturing |
Pinout & Package
Package: DO-218 (Type E), molded plastic case (UL 94V-0), 2.74g weight, lead-free matte tin plating, polarity indicated by bar (cathode) and circle (anode); heatsink tab is electrically connected to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Positive terminal / thermal path | Electrically tied to PCB copper pour for both conduction and thermal management |
| Cathode (Top Surface Pin) | Negative terminal / surge sink | Connected to protected line; conducts surge current to ground/anode when clamped |
Key Features
| Feature | Design Value |
|---|---|
| 6600W Peak Pulse Power | Handles full ISO 16750-2 load-dump energy (≥10ms exponential) without degradation |
| Glass-Passivated Die | Ensures long-term reliability and stable VBR/VC parameters across temperature and life cycles |
| DO-218 Thermal Performance | 0.9°C/W junction-to-case resistance enables 8W steady-state dissipation at TC = +25°C |
| AEC-Q101 & RoHS Compliance | Qualified for automotive production with halogen/antimony-free "Green" construction |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protects microcontroller power rails and CAN transceiver interfaces against alternator load-dump transients during battery disconnect. IC Role / Device Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input. Use Value: Limits voltage excursion to ≤35.5V, preventing latch-up or permanent damage to 3.3V/5V LDOs and MCU I/O. |
Use Scenario: Shields LIN bus transceivers and door module motor drivers from ISO 7637-2 Pulse 1 (inductive kickback) and Pulse 3b (ESD-like switching noise). IC Role / Device Role: Low-capacitance (≈25pF at 0V) TVS on 12V supply rail upstream of local regulators. Use Value: Clamps sub-100ns spikes without signal distortion, preserving LIN timing integrity and motor driver enable logic. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Safeguards radar sensor power inputs against coupled transients from adjacent high-current actuators in ADAS domain controllers. IC Role / Device Role: Primary surge suppression on 5V/3.3V auxiliary rails feeding RF front-end and image signal processors. Use Value: Maintains <150µA leakage at +175°C, ensuring stable biasing and low-noise operation in sealed enclosures. |
Use Scenario: Absorbs regenerative braking surges and contactor bounce transients in EPS motor drive power stages. IC Role / Device Role: High-current TVS mounted directly to heatsinked PCB layer, parallel to main H-bridge supply. Use Value: Withstands 700A IFSM (8.3ms half-sine), preventing MOSFET avalanche failure during rapid deceleration events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Lower PPK (400W), DO-214AC package, RθJC ≈ 50°C/W | Not suitable for ISO 16750-2 load-dump; limited to ISO 7637-2 Pulse 1/2a only | Select only for cost-sensitive non-load-dump applications where thermal budget allows higher junction rise |
| SMCJ22A | PPK = 1500W, DO-214AB package, RθJC ≈ 12°C/W, same VRWM | Meets ISO 7637-2 but fails ISO 16750-2 Pulse A due to insufficient energy handling | Acceptable for BCM/LIN protection where load-dump exposure is eliminated via system-level filtering |
Compared with SMAJ22A and SMCJ22A, DM8W22AQ-13 uniquely satisfies both ISO 16750-2 Pulse A/B and ISO 7637-2 requirements in a single device, with superior thermal performance enabling direct integration into high-power automotive modules without external heatsinks.
Availability
DM8W22AQ-13 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for DM8W22AQ-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.
The DM8WxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO 16750-2 and ISO 7637-2 compliance in 12V/24V vehicle electrical architectures.
FAQ
What is the maximum clamping voltage of DM8W22AQ-13 at rated peak pulse current?
The maximum clamping voltage (VC) is 35.5V at 186A peak pulse current (10/1000µs waveform), measured per JEDEC standards. This value ensures protected circuits remain within safe operating voltage limits during ISO 16750-2 load-dump events, with margin below typical 40V automotive IC absolute maximum ratings.
Is DM8W22AQ-13 suitable for bidirectional surge protection?
No - DM8W22AQ-13 is a unidirectional TVS diode with anode-connected heatsink and cathode pin. It protects only against positive-going transients on the cathode side relative to anode. For bidirectional protection (e.g., data lines), separate symmetric TVS arrays or dedicated bidirectional devices like DMP1004SNS must be used.
How does the DO-218 (Type E) package improve thermal performance over standard SMB/SMA packages?
The DO-218 (Type E) package features an integrated metal heatsink tab electrically connected to the anode, providing a low-resistance thermal path (RθJC = 0.9°C/W) to PCB copper. This is 5–10× better than SMB (RθJC ≈ 50°C/W) or SMA (RθJC ≈ 12°C/W), enabling reliable 6600W surge handling without external heatsinks.
Does DM8W22AQ-13 require derating at elevated ambient temperatures?
Yes - power derating follows the curve in Figure 1 of DS41002: at TC = +100°C, maximum steady-state power drops to ~4.5W; at TC = +150°C, it falls to ~2.0W. Designers must size PCB copper area accordingly to maintain case temperature within limits during continuous operation.
DM8W22AQ-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
DM8W22AQ-13 FAQ
1.How can I place an order for DM8W22AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM8W22AQ-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 DM8W22AQ-13 reliable?
The price and inventory of DM8W22AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM8W22AQ-13 is usually 5 days.
3.What payment methods are accepted for DM8W22AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM8W22AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM8W22AQ-13?
DM8W22AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM8W22AQ-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 DM8W22AQ-13?
For technical support, including DM8W22AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM8W22AQ-13 requirements.
6.How does Aetrix verify that DM8W22AQ-13 is sourced from the original manufacturer or authorized distributors?
All DM8W22AQ-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 DM8W22AQ-13 meets industry standards.
7.What is the process for return or replacement of DM8W22AQ-13?
All DM8W22AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM8W22AQ-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 DM8W22AQ-13 part is unused and in its original packaging.
Return procedure for DM8W22AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM8W22AQ-13 Tags
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