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Vishay General Semiconductor - Diodes Division P6SMB18AHM3/I
- Part No.:
- P6SMB18AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHM3/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB18AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 15.3 V stand-off voltage (VWM), 17.1–18.9 V breakdown voltage (VBR) at 1 mA test current, 25.2 V maximum clamping voltage (VC) at 23.8 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P6SMB18AHM3/I datasheet, P6SMB18AHM3/I pinout, P6SMB18AHM3/I application, or P6SMB18AHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–65 to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast response to ESD and inductive switching transients. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM), low incremental surge resistance, and repeatable clamping behavior under repetitive 0.01% duty cycle pulses.
The device is rated for 600 W peak pulse power (10/1000 μs), derated above 25 °C per Fig. 2, and supports 100 A non-repetitive forward surge current (8.3 ms half-sine). Thermal design requires mounting on 0.2" × 0.2" copper pads per JEDEC standards to achieve specified RθJA of 100 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - Voltage at which device transitions into avalanche conduction; tight tolerance enables precise overvoltage protection. |
| VC (Clamping Voltage) | 25.2 V at IPPM = 23.8 A - Maximum voltage seen by protected circuit during 600 W transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 μs) - Energy-handling capability for standardized surge events; validates suitability for IEC 61000-4-5 Level 3/4 compliance designs. |
| TJ max. | +150 °C - Maximum junction temperature; sets upper limit for thermal design in enclosed or high-ambient environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; used to calculate temperature rise under steady-state power dissipation. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock; suffix HM3 denotes halogen-free, RoHS-compliant AEC-Q101 version. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Provides path for surge current during reverse-transient clamping when cathode is held at higher potential. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side (e.g., VCC or signal line). | Defines polarity-sensitive clamping direction; reverse-biased operation suppresses positive transients toward ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surges without derating in typical industrial layouts. |
| AEC-Q101 qualified (HM3 suffix) | Validates reliability for automotive power modules, body control units, and ADAS sensor interfaces requiring zero-failure field performance. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains and end-of-life recycling mandates. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving protection margin for sensitive logic inputs. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input stage of DC/DC converter or LDO regulator. Use Value: Limits voltage to ≤25.2 V during 600 W surges, preventing damage to 30 V-rated input FETs and enabling compliance with ISO 7637-2 Pulse 5a. |
Use Scenario: Protecting analog outputs and digital I/O of pressure/temperature sensors exposed to motor drive noise. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor signal lines (e.g., CAN, LIN, or analog 4–20 mA) to shunt ESD and coupled transients. Use Value: Clamps 8 kV contact ESD events to <25.2 V within <1 ns, preserving ADC reference integrity and avoiding microcontroller reset. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
|
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-stage TVS across bulk capacitor or post-bridge rectifier to clamp differential-mode transients. Use Value: Absorbs 600 W pulses without degradation, maintaining system uptime and reducing need for redundant MOV+TVS cascades. |
Use Scenario: Shielding Ethernet PHYs and PoE controllers from induced surges on RJ45 ports in enterprise switches and base stations. IC Role / Device Role / Timing Role: Common-mode TVS array element (paired with bidirectional variants) on data pair lines referenced to chassis ground. Use Value: Provides sub-25 V clamping at 23.8 A, ensuring PHY ESD immunity meets IEC 61000-4-2 Level 4 while minimizing signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5B | Same VWM (15.3 V), VC (25.2 V), and PPPM (600 W), but in smaller SMA (DO-214AC) package with higher RθJA (140 °C/W). | Limited to lower-power or space-constrained designs where thermal budget allows higher junction rise. | Select when board area is critical and peak pulse duty cycle remains <0.01%; verify thermal margin with 140 °C/W RθJA. |
| 1.5SMC18A | Same electrical specs but in larger SMC (DO-214AB) package with lower RθJA (60 °C/W); not AEC-Q101 qualified. | Better thermal performance for high-repetition surges, but lacks automotive qualification and halogen-free compliance. | Choose for industrial power supplies needing enhanced thermal headroom without automotive certification requirements. |
Compared with SMAJ18A-E3/5B and 1.5SMC18A, P6SMB18AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and SMB thermal performance (RθJA = 100 °C/W), making it optimal for automotive and high-reliability industrial designs where compliance and consistent surge handling are mandatory.
Availability
P6SMB18AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB18AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and consumer power systems, delivering standardized 600 W surge capability in compact surface-mount packages with AEC-Q101 and RoHS options.
FAQ
What is the maximum clamping voltage of P6SMB18AHM3/I at its rated peak pulse current?
The maximum clamping voltage (VC) of P6SMB18AHM3/I is 25.2 V at a peak pulse current (IPPM) of 23.8 A, measured using the standard 10/1000 μs waveform. This value defines the highest voltage imposed on the protected circuit during a 600 W transient event and is confirmed in the Vishay P6SMB datasheet revision 09-Jan-2024, page 2. Designers use this parameter to verify that downstream components remain within their absolute maximum voltage ratings when P6SMB18AHM3/I is active.
Is P6SMB18AHM3/I qualified for automotive applications?
Yes, P6SMB18AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix - denoting halogen-free, RoHS-compliant construction with full automotive reliability testing. The device meets stress tests including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock per AEC-Q101 Rev D. This makes P6SMB18AHM3/I suitable for under-hood and cabin electronics such as body control modules, infotainment power rails, and ADAS camera power supplies.
What is the thermal resistance junction-to-ambient for P6SMB18AHM3/I?
The typical thermal resistance junction-to-ambient (RθJA) for P6SMB18AHM3/I is 100 °C/W, measured on a standard PCB layout with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking and is used to calculate junction temperature rise under steady-state power dissipation (e.g., PD = 5.0 W). For accurate thermal modeling in high-ambient environments, designers must apply derating curves from Figure 2 of the P6SMB datasheet when ambient exceeds 25 °C.
How does the "HM3" suffix in P6SMB18AHM3/I differ from "M3" or "E3"?
The "HM3" suffix in P6SMB18AHM3/I specifies halogen-free, RoHS-compliant construction with full AEC-Q101 qualification - distinct from "M3" (halogen-free, RoHS, commercial grade only) and "E3" (RoHS-compliant, commercial grade, non-halogen-free). The "H" prefix denotes AEC-Q101 qualification, while "M3" confirms halogen-free materials and JESD201 Class 2 whisker resistance. This combination makes P6SMB18AHM3/I appropriate for automotive Tier 1 suppliers requiring both environmental compliance and automotive reliability validation.
What is the reverse leakage current specification for P6SMB18AHM3/I at its stand-off voltage?
The maximum reverse leakage current (ID) for P6SMB18AHM3/I is 1.0 μA at its stand-off voltage (VWM) of 15.3 V, tested at TA = 25 °C. This low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensor bias networks. The value is guaranteed per the Vishay P6SMB datasheet Table "ELECTRICAL CHARACTERISTICS", row for P6SMB18A, and applies to all variants including P6SMB18AHM3/I.
P6SMB18AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for P6SMB18AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHM3/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/I reliable?
The price and inventory of P6SMB18AHM3/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/I is usually 5 days.
3.What payment methods are accepted for P6SMB18AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHM3/I?
P6SMB18AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHM3/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/I?
For technical support, including P6SMB18AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHM3/I requirements.
6.How does Aetrix verify that P6SMB18AHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHM3/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/I meets industry standards.
7.What is the process for return or replacement of P6SMB18AHM3/I?
All P6SMB18AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHM3/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/I part is unused and in its original packaging.
Return procedure for P6SMB18AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHM3/I Tags
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