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Vishay General Semiconductor - Diodes Division P6SMB33CAHM3_A/I
- Part No.:
- P6SMB33CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHM3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB33CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 33 V standoff voltage (VWM), 36.7 V minimum breakdown voltage (VBR), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB33CAHM3_A/I datasheet, P6SMB33CAHM3_A/I pinout, P6SMB33CAHM3_A/I application, or P6SMB33CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and SMB package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns) to transient events such as ESD, inductive switching spikes, and lightning surges.
The device is rated for 150 °C maximum junction temperature and exhibits low incremental surge resistance, supporting reliable clamping under repetitive 0.01% duty cycle pulses. Thermal resistance from junction to ambient is 100 °C/W, requiring appropriate PCB copper pad area (0.2" × 0.2") for sustained power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 36.7 V min / 40.7 V max at 1 mA - Voltage at which device enters avalanche conduction; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 45.7 V max at 13.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Maximum transient energy absorption capability with standard 10/1000 μs waveform; validates robustness against common surge threats. |
| ID (Reverse Leakage) | 1.0 μA max at 33 V - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | 150 °C - Enables operation in under-hood automotive and industrial environments without thermal derating penalties. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.2 mm height and 3.94 mm length; compatible with JEDEC MS-012 and automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no fixed polarity required in circuit layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables protection of AC signals, differential buses, or floating nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled lines (e.g., RS-485, CAN, audio) without external polarity management. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and consumer electronics with HM3 suffix designation. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line) when properly mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak, eliminating bake-out requirements prior to assembly. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching precision ADC front-end. Use Value: Maintains signal fidelity under 100 V/10 ms load dump events while meeting AEC-Q101 reliability requirements for 15-year vehicle lifetime. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Line-side transient suppressor across differential pair (A/B) to prevent latch-up or damage during EFT bursts. Use Value: Limits clamped voltage to ≤45.7 V during 13.1 A surges, preserving transceiver common-mode range and ensuring bus uptime during EMC testing. |
| Consumer Audio Jack Protection | Telecom DSL Line Interface |
|
Use Scenario: Guarding 3.5 mm TRRS headset jacks in smartphones against human-body ESD events per IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp between tip/ring/sleeve lines and ground to divert ESD without signal distortion. Use Value: Sub-100 pF junction capacitance at 0 V bias ensures <1% THD degradation in 20 Hz–20 kHz audio band while passing ±8 kV ESD. |
Use Scenario: Front-end surge suppression on ADSL/VDSL line cards handling POTS/DSL coexistence and lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection device across line-to-line and line-to-ground paths ahead of G.992.x compliant transceivers. Use Value: Withstands repeated 10/1000 μs surges up to 600 W, extending service life of line drivers and reducing field return rates in outdoor DSLAM deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same SMB package and 33 V VWM, but not AEC-Q101 qualified; higher VC (48.4 V) and lower IPPM (12.3 A). | Targeted at commercial-grade industrial equipment where automotive qualification is unnecessary. | Select when cost sensitivity outweighs automotive reliability requirements and clamping voltage margin allows 48.4 V. |
| 1.5SMC33CA | Larger SMC (DO-214AB) package; identical VWM/VC specs but higher thermal mass (RθJA = 65 °C/W) and 1.5 kW PPPM rating. | Suitable for high-energy surge zones like AC mains input or PoE injectors where PCB space permits larger footprint. | Choose when system-level surge tests exceed IEC 61000-4-5 Level 4 and SMB thermal limits are insufficient. |
Compared with SMBJ33CA and 1.5SMC33CA, the P6SMB33CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free compliance, and SMB footprint - making it optimal for space-constrained automotive and industrial designs requiring certified reliability without layout redesign.
Availability
P6SMB33CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom DSL line protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB33CAHM3_A/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 high-reliability and automotive-grade solutions.
The P6SMB Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecommunications applications where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in P6SMB33CAHM3_A/I?
The "CA" suffix denotes a bidirectional configuration - meaning the P6SMB33CAHM3_A/I provides symmetrical clamping in both polarities, unlike unidirectional variants ending in "A". This eliminates the need for polarity-aware placement and supports AC signal line protection such as RS-485, CAN, or audio jacks. The device has no cathode band marking, confirming its bidirectional nature.
Is P6SMB33CAHM3_A/I qualified for automotive use?
Yes, P6SMB33CAHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix and Vishay documentation. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and accelerated life testing applicable to automotive electronic modules. This qualification applies specifically to the HM3 variant, not generic P6SMB33CA parts.
What is the maximum clamping voltage of P6SMB33CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of P6SMB33CAHM3_A/I is 45.7 V at 13.1 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during standardized surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the HM3 suffix differ from M3 or E3 in P6SMB33CAHM3_A/I?
The "HM3" suffix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - distinguishing it from "M3" (halogen-free/RoHS but not automotive-qualified) and "E3" (RoHS-compliant commercial grade only). The "_A/I" denotes tape-and-reel packaging in 13-inch reels (I) with revision A, supporting high-volume SMT assembly.
Can P6SMB33CAHM3_A/I replace P6SMB33A in an existing design?
No - P6SMB33CAHM3_A/I is bidirectional and AEC-Q101 qualified, whereas P6SMB33A is unidirectional and commercial grade. Swapping requires verifying circuit polarity, clamping symmetry needs, and automotive compliance requirements. Direct replacement is not advised without layout and reliability reassessment, especially in safety-critical systems.
P6SMB33CAHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB33CAHM3_A/I FAQ
1.How can I place an order for P6SMB33CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHM3_A/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 P6SMB33CAHM3_A/I reliable?
The price and inventory of P6SMB33CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHM3_A/I?
P6SMB33CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHM3_A/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 P6SMB33CAHM3_A/I?
For technical support, including P6SMB33CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB33CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHM3_A/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 P6SMB33CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHM3_A/I?
All P6SMB33CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHM3_A/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 P6SMB33CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB33CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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