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Vishay General Semiconductor - Diodes Division P6SMB18AHM3_B/I
- Part No.:
- P6SMB18AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHM3_B/I.pdf
- Description:
- 600W,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,915
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Product details
Overview
P6SMB18AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), 25.2 V maximum clamping voltage (VC) at 23.8 A peak pulse current, and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the P6SMB18AHM3_B/I datasheet, P6SMB18AHM3_B/I pinout, P6SMB18AHM3_B/I application, or P6SMB18AHM3_B/I equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive ECUs and industrial motor drives requiring stable transient suppression without layout redesign.
Technical Context
This unidirectional TVS operates by avalanche breakdown to clamp transient overvoltages above its stand-off voltage (VWM = 15.3 V) while maintaining <1.0 µA reverse leakage at rated temperature. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1.0 ns), enabling protection of sensitive 3.3 V/5 V logic interfaces and analog sensor inputs.
The device delivers 600 W peak pulse power under standardized 10/1000 µs waveform with 0.01% duty cycle, supported by thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. Its cathode-band polarity marking and matte tin-plated leads comply with J-STD-002 solderability and JESD22-B102 whisker testing (Class 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1.0 mA - defines precise avalanche onset window for repeatable clamping threshold |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 25.2 V at 23.8 A - clamped voltage during 600 W transient, limiting stress on downstream 24 V-rated components |
| PPPM | 600 W (10/1000 µs) - peak surge energy handling capacity compatible with ISO 7637-2 Pulse 1/2a/5a test profiles |
| TJ max | +150 °C - enables operation in under-hood automotive environments and enclosed industrial enclosures |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint with 5.59 mm length; supports automated SMT placement and reflow |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 3.94 mm × 2.20 mm × 1.75 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 24 V rail or sensor output) to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy load dump and inductive kick events common in 24 V vehicle systems without degradation |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage overshoot during clamping, preserving margin for 30 V-rated downstream FETs and regulators |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets EU ELV and IPC-1752A material compliance requirements for sustainable manufacturing |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without baking, reducing production cost and handling risk |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from alternator load dump spikes (ISO 7637-2 Pulse 5a) and relay coil flyback. IC Role / Device Role: Unidirectional TVS placed between 12/24 V supply and ground, clamping transients before they reach LDOs and MCU VCC. Use Value: Maintains VC ≤ 25.2 V during 600 W surges, preventing latch-up or permanent damage to 3.3 V/5 V logic circuitry. |
Use Scenario: Shields 24 V digital input optocoupler circuits from field-wiring induced surges (IEC 61000-4-5 Level 3). IC Role / Device Role: Standoff protection on dry-contact input lines, absorbing induced common-mode transients before signal conditioning stage. Use Value: Limits voltage excursion to ≤25.2 V at 23.8 A, ensuring optocoupler CTR stability and preventing false triggering. |
| Automotive Body Control Module (BCM) | Industrial Motor Drive Signal Interface |
Use Scenario: Safeguards LIN bus transceivers and LED driver ICs from ESD (IEC 61000-4-2 ±8 kV contact) and capacitive coupling noise. IC Role / Device Role: Localized TVS on LIN data line and 12 V bias rail, leveraging fast <1 ns response to suppress nanosecond-scale ESD events. Use Value: Achieves <1.0 µA leakage at 15.3 V, preserving battery life in always-on BCM sleep modes. |
Use Scenario: Clamps back-EMF transients from solenoid valves and relay coils interfacing with microcontroller I/O pins. IC Role / Device Role: Primary suppression element on 24 V control signal lines feeding discrete gate drivers or opto-isolators. Use Value: Withstands repetitive 100 A IFSM surges (8.3 ms half-sine), enabling long-term reliability in cyclic industrial actuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5B | Same VBR range (17.1–18.9 V), but SMA package (smaller 4.5 × 2.7 mm footprint); 400 W PPPM, higher RθJA = 120 °C/W | Limited to lower-energy transients; less suitable for automotive load dump where 600 W rating is required | Select when board space is constrained and surge energy remains below 400 W |
| 1.5SMC18A | Same VBR and PPPM, but SMC (DO-214AB) package (7.1 × 6.2 mm); non-AEC-Q101; lead-free only (no halogen-free option) | Not qualified for automotive use; lacks MSL Level 1 rating and JESD22-B102 whisker testing | Select for cost-sensitive industrial applications where AEC-Q101 and halogen-free compliance are not mandated |
Compared with SMAJ18A-E3/5B and 1.5SMC18A, P6SMB18AHM3_B/I uniquely combines AEC-Q101 qualification, halogen-free construction, 600 W surge capability in compact SMB, and MSL Level 1 - making it the only choice for space-constrained, high-reliability automotive modules requiring full compliance traceability.
Availability
P6SMB18AHM3_B/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC input modules, body control modules, and motor drive signal interfaces requiring stable component supply with full AEC-Q101 documentation and halogen-free compliance.
Supply support for P6SMB18AHM3_B/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in automotive and industrial environments, designed specifically to meet ISO 7637-2, IEC 61000-4-5, and AEC-Q101 requirements with robust glass-passivated junctions and standardized SMB packaging.
FAQ
What is the clamping voltage of P6SMB18AHM3_B/I at its rated peak pulse current?
The P6SMB18AHM3_B/I has a maximum clamping voltage (VC) of 25.2 V at its rated peak pulse current (IPPM) of 23.8 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream 24 V-rated components remain within safe voltage margins during transient events. The P6SMB18AHM3_B/I datasheet specifies this parameter in Table 1 under ELECTRICAL CHARACTERISTICS.
Is P6SMB18AHM3_B/I qualified for automotive applications?
Yes, P6SMB18AHM3_B/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's P6SMB Series datasheet (Document Number: 88370, Revision: 09-Jan-2024). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev G, making it suitable for engine control, body electronics, and ADAS subsystems. The P6SMB18AHM3_B/I meets all requirements for automotive-grade transient suppression.
What does the "_B/I" suffix indicate in P6SMB18AHM3_B/I?
The "_B" denotes AEC-Q101 qualification for the P6SMB18AHM3_B/I series (applicable to P6SMB6.8A through P6SMB220A), while "/I" specifies packaging in 13-inch plastic tape and reel with 3200 units per reel. The "HM3" portion confirms halogen-free, RoHS-compliant construction with JESD22-B102 Class 2 whisker resistance. This full suffix identifies P6SMB18AHM3_B/I as an automotive-grade, environmentally compliant, high-volume production variant.
How does the thermal performance of P6SMB18AHM3_B/I compare to similar SMB-packaged TVS diodes?
P6SMB18AHM3_B/I features typical thermal resistance values of RθJA = 100 °C/W and RθJL = 20 °C/W, measured on 0.2" × 0.2" copper pads. These values are optimized for SMB (DO-214AA) and enable reliable 5.0 W steady-state power dissipation at TA = 50 °C. Compared to generic SMB TVS diodes lacking thermal characterization, the P6SMB18AHM3_B/I provides documented, application-ready thermal data essential for thermal design validation in sealed automotive enclosures.
Can P6SMB18AHM3_B/I be used in bidirectional configurations?
No, P6SMB18AHM3_B/I is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and cathode band marking. Bidirectional variants in the same series use the "CA" suffix (e.g., P6SMB18CA). Using P6SMB18AHM3_B/I in bidirectional applications would result in forward conduction during negative transients, causing failure. For bidirectional protection, select P6SMB18CAHE3_B/I or equivalent with verified symmetrical VBR characteristics.
P6SMB18AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB18AHM3_B/I FAQ
1.How can I place an order for P6SMB18AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHM3_B/I 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 P6SMB18AHM3_B/I reliable?
The price and inventory of P6SMB18AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB18AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB18AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHM3_B/I?
P6SMB18AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHM3_B/I 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 P6SMB18AHM3_B/I?
For technical support, including P6SMB18AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB18AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHM3_B/I 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 P6SMB18AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB18AHM3_B/I?
All P6SMB18AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHM3_B/I, 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 P6SMB18AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB18AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHM3_B/I Tags
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