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Vishay General Semiconductor - Diodes Division P6SMB33AHM3_B/I
- Part No.:
- P6SMB33AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33AHM3_B/I.pdf
- Description:
- 600W,33V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
P6SMB33AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 33 V standoff voltage (VWM), 45.7 V clamping voltage at 13.1 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of MOSFET gates, sensor signal lines, and DC power rails in automotive ECUs and industrial PLCs.
For engineers reviewing the P6SMB33AHM3_B/I datasheet, P6SMB33AHM3_B/I pinout, P6SMB33AHM3_B/I application, or P6SMB33AHM3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 rating, 150 °C max junction temperature, and verified clamping performance under repetitive 0.01% duty cycle transients.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 31.4–34.7 V breakdown range (VBR at 1 mA). It responds in sub-nanosecond time to transient spikes induced by inductive switching or ESD events, limiting voltage across protected circuit nodes to ≤45.7 V at 13.1 A IPPM.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it delivers 600 W peak pulse power dissipation with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. Its glass-passivated junction ensures stable leakage (<1 μA at 28.2 V) and long-term reliability under repeated surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin for protected line. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - precise avalanche initiation threshold; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 45.7 V at 13.1 A IPPM - peak voltage seen by downstream circuitry during worst-case 10/1000 μs surge; determines protection margin. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorption capability per 10/1000 μs waveform; supports robust IEC 61000-4-5 level 4 immunity. |
| IFSM (Surge Current) | 100 A - single half-sine 8.3 ms forward surge rating; validates resilience against accidental polarity reversal or latch-up events. |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMB (DO-214AA) - standardized low-profile SMD outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during reverse-biased surge events. |
| Cathode | Protected line connection | Connected to the node requiring overvoltage protection (e.g., IC supply rail or sensor input); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 MSL Level 1 - enables use in green manufacturing and high-reliability consumer/industrial products. |
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating - eliminates need for external series impedance in many designs. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - preserves margin for 3.3 V/5 V logic interfaces and low-voltage MOSFET gate drivers. |
| Glass passivated junction | Ensures stable leakage (<1 μA at VWM) and consistent VBR over 10+ years field life - critical for battery-powered and always-on systems. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of 12 V supply rail and CAN transceiver power pins against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VCC and GND, absorbing >400 V spikes within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontroller power domains and CAN PHY ICs during vehicle cranking or battery disconnect events. |
Use Scenario: Shielding 24 V digital input channels from inductive kickback generated by solenoid valve switching. IC Role / Device Role / Timing Role: Standoff-connected TVS on each input channel, conducting only during >30 V transients while remaining invisible during normal 0–24 V operation. Use Value: Eliminates false triggering and extends optocoupler lifetime by limiting transient voltage to <46 V - well below 60 V isolation barrier rating. |
| Consumer Smart Appliance Motor Driver | Telecom Base Station Power Management |
Use Scenario: Guarding gate driver IC inputs against Miller-induced voltage spikes during BLDC motor commutation. IC Role / Device Role / Timing Role: Local TVS mounted adjacent to gate driver output, clamping fast-rising dV/dt transients before they couple into logic inputs. Use Value: Reduces gate driver failure rate by >90% in high-speed motor control applications where layout parasitics amplify ringing. |
Use Scenario: Safeguarding 48 V intermediate bus converters from lightning-induced surges entering via telecom line interface cards. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with upstream MOVs to handle multi-kA surge currents with controlled voltage let-through. Use Value: Enables compliance with GR-1089-CORE Section 4.5.2 (lightning surge) while maintaining <50 V clamping to protect downstream SiC MOSFET gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5B | Same VWM (28.2 V), identical SMB package, but lower PPPM (400 W) and higher VC (53.3 V at 7.5 A). | Limited to lower-energy transients (IEC 61000-4-5 level 2); unsuitable for automotive load dump or industrial 24 V solenoid protection. | Select only when cost sensitivity outweighs surge margin requirements and layout allows tighter thermal management. |
| 1.5SMC33AHE3_A/H | Higher package thermal mass (SMC/DO-214AB), same VWM/VC specs, but rated for 1500 W PPPM and 200 A IFSM. | Used where PCB space permits larger footprint and system requires higher single-pulse survivability (e.g., railway signaling). | Choose when board area is available and design must withstand >10× higher surge energy than P6SMB33AHM3_B/I can handle. |
Compared with SMAJ33A-E3/5B, P6SMB33AHM3_B/I delivers 50% higher peak pulse power and 14% lower clamping voltage - enabling robust protection in space-constrained automotive and industrial modules. Against 1.5SMC33AHE3_A/H, it trades surge capacity for 30% smaller footprint and full AEC-Q101 qualification - making it optimal for high-volume, safety-critical SMT deployments.
Availability
P6SMB33AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC input protection, and telecom power management systems requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for P6SMB33AHM3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, low clamping ratios, and seamless SMT integration in space-constrained designs.
FAQ
What is the clamping voltage of the P6SMB33AHM3_B/I under a 10/1000 μs surge?
The P6SMB33AHM3_B/I clamps to a maximum of 45.7 V when subjected to its rated 13.1 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with device mounted on 0.2" × 0.2" copper pads per Vishay specification document 88370. The clamping voltage directly defines the maximum stress imposed on downstream components during surge events.
Is the P6SMB33AHM3_B/I qualified for automotive applications?
Yes, the P6SMB33AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3_B suffix and documentation in Vishay's P6SMB Series datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - making P6SMB33AHM3_B/I suitable for under-hood and chassis-mounted automotive electronics.
What does the "HM3_B/I" suffix indicate in P6SMB33AHM3_B/I?
The "HM3" denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance; "B" indicates AEC-Q101 qualification for the 6.8 V to 220 V voltage range; and "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This full suffix confirms P6SMB33AHM3_B/I meets automotive-grade material, reliability, and logistics requirements.
How does the P6SMB33AHM3_B/I compare to bidirectional TVS diodes like P6SMB33CA?
The P6SMB33AHM3_B/I is unidirectional and features a cathode band for polarity identification, whereas P6SMB33CA is bidirectional with no polarity marking. Unidirectional operation allows P6SMB33AHM3_B/I to be used on DC rails where reverse conduction must be blocked - such as protecting the anode of a Schottky output rectifier or the cathode of a Zener reference. Bidirectional variants are reserved for AC-coupled or floating signal lines.
What is the maximum junction temperature rating for the P6SMB33AHM3_B/I?
The P6SMB33AHM3_B/I has a maximum junction temperature (TJ max) of +150 °C, as specified in Vishay's P6SMB Series datasheet. This rating enables reliable operation in high-ambient environments such as engine compartments, industrial motor drives, and enclosed telecom power supplies - provided thermal design accounts for RθJA = 100 °C/W and appropriate copper pad area is used.
P6SMB33AHM3_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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
P6SMB33AHM3_B/I FAQ
1.How can I place an order for P6SMB33AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33AHM3_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 P6SMB33AHM3_B/I reliable?
The price and inventory of P6SMB33AHM3_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 P6SMB33AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB33AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33AHM3_B/I?
P6SMB33AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33AHM3_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 P6SMB33AHM3_B/I?
For technical support, including P6SMB33AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB33AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB33AHM3_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 P6SMB33AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB33AHM3_B/I?
All P6SMB33AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33AHM3_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 P6SMB33AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB33AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33AHM3_B/I Tags
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