My Inquiry
My Account
Diodes Incorporated DM5W18A-13
- Part No.:
- DM5W18A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
DM5W18A-13.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO218
- Quantity:
- Payment:
- Shipping:
Inventory:8,055
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DM5W18A-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 3600W peak pulse power (10/1000µs), 18V reverse standoff voltage (VRWM), 29.2V max clamping voltage at 123A IPP, and DO-218 (Type E) package with anode-heatsink polarity. It is qualified to AEC-Q standards and used in engine control units, body control modules, and infotainment power rails.
For engineers reviewing the DM5W18A-13 datasheet, DM5W18A-13 pinout, DM5W18A-13 application, or DM5W18A-13 equivalent, this page delivers verified electrical specs, thermal performance data, automotive compliance details, and real-world design context for high-reliability 12V/24V vehicle systems.
Technical Context
This unidirectional TVS diode operates as a clamping device in parallel with sensitive electronics, activating above its 20.0–22.1V breakdown voltage (VBR) to divert surge current away from downstream circuitry. Its low 1.1°C/W junction-to-case thermal resistance enables efficient heat transfer to the PCB heatsink pad.
The device meets ISO16750-2 load dump (10ms exponential waveform) and ISO7637-2 Pulse 1/2a/3a/3b requirements, with 500A IFSM capability and <10µA reverse leakage at VRWM. Its DO-218 package supports high-power dissipation while maintaining RoHS-compliant, halogen-free "Green" construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3600W (10/1000µs waveform): sustains single high-energy transients without failure in automotive load dump events |
| Reverse Standoff Voltage | 18V: stable blocking threshold for 12V battery systems, allowing normal operation below surge thresholds |
| Clamping Voltage | 29.2V @ 123A IPP: limits voltage seen by protected ICs during worst-case surge, preserving 5V/3.3V logic integrity |
| Breakdown Voltage | 20.0–22.1V @ 5mA IT: ensures reliable turn-on margin above VRWM to prevent premature conduction |
| Junction-to-Case Thermal Resistance | 1.1°C/W: enables effective thermal coupling to copper heatsink pads on PCB, critical for sustained power handling |
| Operating Temperature Range | −55°C to +175°C: supports under-hood deployment in modern ICE and EV powertrain electronics |
| Surge Current Rating | 500A IFSM (8.3ms half-sine): withstands repetitive surge stress without degradation in alternator fault conditions |
Pinout & Package
Package: DO-218 (Type E), surface-mount, anode-connected heatsink tab. Molded plastic body (UL 94V-0), matte tin-plated terminals, polarity indicated by cathode bar marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | Current return path and thermal interface | Must be soldered to large copper area for thermal management; electrically connected to anode of internal PN junction |
| Cathode (Top Lead) | Surge current input node | Connected to protected line (e.g., battery rail); clamps to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 3600W Peak Pulse Power | Enables single-device protection against ISO16750-2 load dump surges up to 35V/10ms without derating or parallel devices |
| Low Clamping Ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream components-critical for protecting automotive MCUs and CAN transceivers |
| AEC-Q Qualified Reliability | Validated per JEDEC standards for automotive-grade lifetime and robustness in harsh thermal cycling environments |
| Halogen & Antimony Free ("Green") | Meets global environmental regulations (RoHS 3, ELV) without compromising surge performance or thermal stability |
| DO-218 Thermal Performance | 1.1°C/W RθJC allows >5W steady-state dissipation when mounted on ≥250mm² 2oz Cu pad, supporting long-duration transients |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Rail |
|---|---|
Use Scenario: Protects microcontroller, sensor interfaces, and LIN/CAN transceivers from alternator load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed directly at ECU main power entry point before DC-DC converters. Use Value: Limits transient voltage to ≤29.2V, preventing latch-up or gate oxide damage in 3.3V/5V logic despite 35V+ load dump events. |
Use Scenario: Shields door module actuators, LED drivers, and EEPROM from ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (capacitive coupling). IC Role / Device Role / Timing Role: Parallel-connected TVS across 12V supply rail, activated within nanoseconds of overvoltage onset. Use Value: Absorbs 123A peak current with <10µA leakage at 18V, ensuring zero standby power penalty and no false resets. |
| Infotainment System Power Supply | ADAS Camera Module Input |
Use Scenario: Guards USB-C PD controllers, audio codecs, and display drivers against battery voltage spikes during cold-cranking and cranking recovery. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of LDOs and buck regulators feeding SoC subsystems. Use Value: Maintains 18V VRWM compatibility with 12V nominal systems while clamping fast 10/1000µs pulses to safe levels for 28nm/16nm processors. |
Use Scenario: Safeguards image sensor power and MIPI CSI-2 interface lines from ESD and conducted transients in front-end camera housings. IC Role / Device Role / Timing Role: High-power TVS on main 12V input rail, paired with low-capacitance TVS on signal lines. Use Value: Delivers 3600W surge capacity without adding parasitic capacitance (>40pF typical), preserving signal integrity at 1.5Gbps MIPI data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Lower 400W PPK rating, SMA package (RθJC ≈ 40°C/W), 27.7V VC @ 12.9A IPP | Suitable only for lower-energy ISO7637-2 Pulse 3a/b; not rated for load dump or IFSM=500A | Select when cost sensitivity outweighs automotive surge severity; requires derating above +85°C ambient |
| SMCJ18A | 1500W PPK, SMC package (RθJC ≈ 3.5°C/W), 29.2V VC @ 51.2A IPP, same VRWM | Meets ISO7637-2 but fails ISO16750-2 load dump due to insufficient IPP and thermal mass | Use where board space permits larger SMC footprint and thermal design supports moderate surge repetition |
Compared with SMAJ18A and SMCJ18A, DM5W18A-13 uniquely combines 3600W surge capacity, 500A IFSM, and 1.1°C/W thermal resistance in a compact DO-218 package-enabling single-device compliance with both ISO7637-2 and ISO16750-2 in space-constrained automotive modules.
Availability
DM5W18A-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera power supplies requiring stable component supply across automotive production lifecycles.
Supply support for DM5W18A-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.
DM5W18A-13 belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically to meet stringent ISO16750-2 load dump and ISO7637-2 surge immunity requirements in next-generation vehicle electronics.
FAQ
What is the maximum clamping voltage of DM5W18A-13 at its rated peak pulse current?
The maximum clamping voltage (VC) is 29.2V at 123A peak pulse current (IPP), measured under the standardized 10/1000µs waveform. This value is guaranteed across the full operating temperature range (−55°C to +175°C) and ensures downstream 5V/3.3V ICs remain within safe absolute maximum ratings during surge events.
How does the DO-218 package improve thermal performance compared to SMA or SMC packages?
The DO-218 (Type E) package features an integrated anode heatsink tab that provides direct thermal conduction to the PCB, achieving a junction-to-case thermal resistance of just 1.1°C/W-over 30× better than SMA and ~3× better than SMC. This allows sustained power dissipation and higher surge repetition tolerance in confined automotive layouts.
Is DM5W18A-13 compliant with automotive qualification standards?
Yes-DM5W18A-13 is qualified to AEC-Q200 standards for passive components and meets ISO7637-2 (Pulse 1, 2a, 3a, 3b) and ISO16750-2 (load dump) requirements. It is also RoHS 3 compliant, halogen-free, and rated for operation from −55°C to +175°C junction temperature.
Can DM5W18A-13 replace older TVS diodes like P6SMB18A in automotive designs?
No-P6SMB18A has only 600W PPK and 38.9V clamping voltage, making it unsuitable for ISO16750-2 load dump. DM5W18A-13 delivers 6× higher surge power, 9.7V lower clamping, and AEC-Q qualification. Direct replacement requires layout review to accommodate DO-218 footprint and thermal pad requirements.
DM5W18A-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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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
DM5W18A-13 FAQ
1.How can I place an order for DM5W18A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DM5W18A-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 DM5W18A-13 reliable?
The price and inventory of DM5W18A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM5W18A-13 is usually 5 days.
3.What payment methods are accepted for DM5W18A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM5W18A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM5W18A-13?
DM5W18A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM5W18A-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 DM5W18A-13?
For technical support, including DM5W18A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM5W18A-13 requirements.
6.How does Aetrix verify that DM5W18A-13 is sourced from the original manufacturer or authorized distributors?
All DM5W18A-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 DM5W18A-13 meets industry standards.
7.What is the process for return or replacement of DM5W18A-13?
All DM5W18A-13 units undergo pre-shipment inspection (PSI). If there is an issue with DM5W18A-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 DM5W18A-13 part is unused and in its original packaging.
Return procedure for DM5W18A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM5W18A-13 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
