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Taiwan Semiconductor Corporation P6SMB18H
- Part No.:
- P6SMB18H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18H.pdf
- Description:
- 600W, 18V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,196
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Product details
Overview
P6SMB18H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 16.2–19.8 V, stand-off voltage of 14.5 V, and clamping voltage of 26.5 V at 23 A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients in DO-214AA (SMB) package.
For engineers reviewing the P6SMB18H datasheet, P6SMB18H pinout, P6SMB18H application, or P6SMB18H equivalent, key selection criteria include unidirectional polarity, 1.0 mA test current, <1 µA reverse leakage at VWM, AEC-Q101 qualification, and junction-to-ambient thermal resistance of 55 °C/W - all critical for ESD and load-dump protection in space-constrained PCB layouts.
Technical Context
The P6SMB18H uses a glass-passivated silicon junction to achieve fast response time (<1.0 ps from 0 V to VBR(min)) and stable clamping under repetitive surge stress. Its unidirectional configuration enables asymmetric protection on DC power lines where reverse polarity is not expected.
Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and ISO 7637-2 immunity requirements for vehicle electrical systems. The DO-214AA package supports automated placement and provides 10 °C/W junction-to-case thermal resistance for effective power dissipation during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 16.2 V / 19.8 V - ensures reliable breakdown initiation above system operating voltage while accommodating process variation |
| VWM | 14.5 V - maximum continuous reverse working voltage; must exceed nominal rail voltage (e.g., 12 V automotive) with margin |
| VC @ IPPM | 26.5 V - clamped voltage during 23 A 10/1000 µs surge; defines worst-case overvoltage seen by protected IC |
| PPPSM | 600 W - peak pulse power rating per 10/1000 µs waveform; determines survivability against load dump or inductive kick |
| IR @ VWM | <1 µA - ultra-low reverse leakage preserves battery life and avoids false triggering in low-power circuits |
| TJ(max) | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline with 0.090 g mass and J-STD-002 solderable matte tin leads |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; polarity-sensitive unidirectional device; terminals are matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC power return path | Connected to ground or low-side reference; completes conduction path during reverse-biased transient clamp |
| Cathode | Protected line input | Connected to +12 V rail or signal line; blocks normal operation but conducts during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| Clamping voltage ≤26.5 V | Ensures downstream 3.3 V/5 V logic ICs remain within absolute maximum ratings during 23 A surge |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies SMT manufacturing |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally restricted substances |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump pulses up to 35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤26.5 V, preventing damage to upstream regulators and microcontrollers rated for 36 V max input. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role: TVS mounted at connector entry point on 24 V supply line feeding isolated signal conditioning circuitry. Use Value: Sub-1 µA leakage avoids loading precision voltage references; 26.5 V clamping prevents latch-up in op-amps with ±15 V supplies. |
| LED Lighting Driver Protection | Motor Control Board Surge Suppression |
Use Scenario: Safeguarding constant-current LED drivers against inductive switching spikes from relay or MOSFET control circuits. IC Role / Device Role: TVS connected across driver output terminals to absorb flyback energy from solenoid loads. Use Value: 600 W peak power rating handles repeated 10/1000 µs surges without degradation; DO-214AA footprint fits tight board spacing near connectors. | Use Scenario: Suppressing voltage spikes generated by brushed DC motor commutation in HVAC blower modules. IC Role / Device Role: TVS installed across motor terminals to clamp back-EMF transients before they couple into MCU GPIO or PWM driver ICs. Use Value: 150 °C max junction temperature supports operation near hot motors; AEC-Q101 qualification ensures reliability in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same DO-214AA package, bidirectional variant; VBR = 20–22.1 V; VC = 29.2 V @ 20.5 A | Supports AC-coupled or polarity-agnostic protection; higher clamping voltage reduces margin for 12 V systems | Select SMBJ18A only if bidirectional protection is required; otherwise P6SMB18H offers tighter VBR tolerance and lower clamping. |
| 1.5SMC18A | DO-214AB (SMC) package; larger footprint; VBR = 19.0–21.0 V; VC = 29.2 V @ 20.5 A; PPPSM = 1500 W | Higher power handling but incompatible PCB layout; requires redesign for thermal pad and trace width | Choose 1.5SMC18A only when >600 W surge capability is mandatory and board space allows larger SMC outline. |
Compared with SMBJ18A and 1.5SMC18A, the P6SMB18H delivers optimal balance of compact DO-214AA size, AEC-Q101 compliance, and precise 16.2–19.8 V breakdown for 12 V automotive rails - making it the preferred choice where space, qualification, and clamping performance are jointly constrained.
Availability
P6SMB18H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver surge suppression requiring stable component supply across production lifecycles.
Supply support for P6SMB18H 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P6SMB series belongs to TSC's AEC-Q101-qualified transient voltage suppressor family, engineered specifically for robustness against automotive load dump, ESD, and ISO 7637-2 transients in space-limited surface-mount applications.
FAQ
What is the polarity configuration of the P6SMB18H?
The P6SMB18H is a unidirectional TVS diode, marked with a cathode band indicating the terminal that connects to the protected line (e.g., +12 V rail), while the anode connects to ground. This configuration blocks forward current during normal operation and clamps reverse transients - unlike bidirectional variants such as P6SMB18AH, which protect both polarities.
Does the P6SMB18H meet automotive qualification standards?
Yes, the P6SMB18H is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock. It also meets ISO 7637-2 immunity requirements for Pulse 1, 2a, 2b, 3a, and 3b - confirming suitability for under-hood and body-control module applications.
What is the maximum clamping voltage of the P6SMB18H and at what current?
The P6SMB18H has a maximum clamping voltage (VC) of 26.5 V at a peak pulse current (IPPM) of 23 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events.
Can the P6SMB18H be used in bidirectional protection applications?
No - the P6SMB18H is unidirectional only. For bidirectional protection, select the P6SMB18AH variant (marked LEJ), which features symmetric breakdown in both directions and identical VBR, VWM, and VC specifications for positive and negative transients.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of the P6SMB18H?
The P6SMB18H has Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions without baking prior to reflow. It is compatible with standard lead-free reflow profiles (peak temperature ≤260 °C) and features matte tin-plated leads qualified per J-STD-002.
P6SMB18H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 23A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB18H FAQ
1.How can I place an order for P6SMB18H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18H 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 P6SMB18H reliable?
The price and inventory of P6SMB18H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18H is usually 5 days.
3.What payment methods are accepted for P6SMB18H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18H?
P6SMB18H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18H 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 P6SMB18H?
For technical support, including P6SMB18H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18H requirements.
6.How does Aetrix verify that P6SMB18H is sourced from the original manufacturer or authorized distributors?
All P6SMB18H 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 P6SMB18H meets industry standards.
7.What is the process for return or replacement of P6SMB18H?
All P6SMB18H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18H, 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 P6SMB18H part is unused and in its original packaging.
Return procedure for P6SMB18H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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