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Vishay General Semiconductor - Diodes Division P6SMB33CAHM3_B/H
- Part No.:
- P6SMB33CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHM3_B/H.pdf
- Description:
- 600W,33V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,873
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Product details
Overview
P6SMB33CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 at 13.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P6SMB33CAHM3_B/H datasheet, P6SMB33CAHM3_B/H pinout, P6SMB33CAHM3_B/H application, or P6SMB33CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional structure. It responds within <1 ns to transient overvoltages and maintains stable clamping performance across -65 °C to +150 °C junction temperature range.
Designed for repetitive surge events at 0.01% duty cycle, it delivers 600 W peak pulse power under standardized 10/1000 μs waveform while limiting clamped voltage to ≤45.7 V at 13.1 A. Its glass-passivated junction ensures robust reliability and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed voltage threshold where device transitions into avalanche conduction; tight tolerance supports precise protection design. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 13.1 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge; determines downstream component stress level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capacity per single 10/1000 μs event; enables robust immunity against ESD and load-switching spikes. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Minimal standby current leakage ensures negligible power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD22-B102. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | One side of symmetrical junction; connects to line being protected without directional constraint in bidirectional use. |
| Cathode | Current exit terminal in forward bias | Other side of symmetrical junction; functionally identical to Anode under reverse bias - enables dual-direction clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - reduces BOM count vs. unidirectional pairs. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges up to 4 kV (line-to-ground) in properly designed layouts. |
| AEC-Q101 qualified (HM3_B) | Validated for automotive electronics including engine control modules, ADAS sensors, and body control units requiring long-term field reliability. |
| Low profile SMB package | 0.220" × 0.155" footprint fits dense PCB layouts; compatible with standard pick-and-place equipment and reflow profiles up to 260 °C peak. |
| Glass passivated junction | Enhances moisture resistance and long-term stability of breakdown characteristics - critical for extended service life in humid environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within nanoseconds to suppress overvoltage before IC damage occurs. Use Value: Maintains signal integrity during 12 V/24 V system transients while meeting AEC-Q101 requirements for automotive deployment. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against EFT/burst noise and lightning-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on field-side signal traces, absorbing energy before reaching isolation barriers or microcontroller GPIOs. Use Value: Enables reliable operation in harsh electromagnetic environments with minimal added board space and no external biasing components. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485/RS-232 data lines in base stations and network equipment from induced surges caused by nearby AC power faults or lightning coupling. IC Role / Device Role / Timing Role: Fast-acting shunt protector located adjacent to connector, clamping differential-mode transients between A/B lines and common reference. Use Value: Prevents communication lockup and latch-up in transceivers while supporting >1 Mbps data rates due to low junction capacitance (~200 pF at 0 V). |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-the-line TVS connected in parallel with motor winding to divert inductive kickback energy away from driver MOSFETs and MCU pins. Use Value: Extends lifespan of half-bridge drivers and eliminates need for snubber RC networks in cost-sensitive white-goods designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM/VBR/VC specs but in smaller SMA (DO-214AC) package; lower thermal mass and 400 W PPPM rating. | Limited to lower-energy transients; less suitable for automotive load-dump scenarios requiring full 600 W capability. | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports). |
| 1.5KE33CA | Through-hole TO-218 package; same 33 V bidirectional rating but higher 1500 W PPPM and larger thermal mass. | Better suited for high-reliability industrial power supplies where manual assembly or wave soldering is used. | Choose when legacy through-hole manufacturing or extreme surge immunity (>1 kV) is required, accepting larger footprint. |
Compared with SMAJ33CA and 1.5KE33CA, P6SMB33CAHM3_B/H offers optimal balance of SMT compatibility, AEC-Q101 qualification, 600 W surge handling, and SMB footprint - making it preferred for new automotive and industrial surface-mount designs where reliability and manufacturability are jointly prioritized.
Availability
P6SMB33CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB33CAHM3_B/H 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 passive components with emphasis on high-reliability and automotive-grade solutions.
The P6SMB Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust transient suppression in automotive, industrial, and communications systems where fast response, repeatable clamping, and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix mean in P6SMB33CAHM3_B/H?
The "CA" suffix in P6SMB33CAHM3_B/H indicates a bidirectional configuration - meaning the device provides symmetrical clamping in both polarities, eliminating the need to consider anode/cathode orientation during placement. This is essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating sensor outputs where voltage polarity may reverse. The P6SMB33CAHM3_B/H achieves this via a back-to-back diode structure inside a single SMB package.
Is P6SMB33CAHM3_B/H suitable for automotive applications?
Yes, P6SMB33CAHM3_B/H is AEC-Q101 qualified (denoted by the "HM3_B" suffix), confirming its suitability for automotive applications including engine control units, ADAS sensors, and body electronics. It undergoes rigorous stress testing for temperature cycling, humidity bias, and mechanical shock. Its 600 W peak pulse power, 150 °C max junction temperature, and halogen-free RoHS compliance meet Tier-1 supplier requirements for under-hood and cabin-mounted systems.
How does the clamping voltage of P6SMB33CAHM3_B/H compare to its standoff voltage?
P6SMB33CAHM3_B/H has a standoff voltage (VWM) of 28.2 V and a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current. This 17.5 V differential represents the voltage "overshoot" during transient suppression - a critical design parameter that must remain below the absolute maximum rating of downstream ICs. The low incremental surge resistance of the device ensures minimal VC rise under increasing current, maintaining predictable protection margins.
What is the significance of the "HM3" and "B/H" in P6SMB33CAHM3_B/H?
In P6SMB33CAHM3_B/H, "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification, while "B/H" specifies the packaging format: "B" indicates AEC-Q101 qualification level, and "H" means supplied in 7" diameter plastic tape and reel with 750 units per reel. This ordering code ensures traceability, compliance, and compatibility with high-speed SMT assembly lines using standard 8 mm carrier tape.
Can P6SMB33CAHM3_B/H replace unidirectional TVS diodes in existing designs?
P6SMB33CAHM3_B/H can replace unidirectional TVS diodes only if the circuit topology supports bidirectional clamping - for example, when protecting a grounded signal line or symmetric differential pair. It must not be substituted in series with DC-biased rails (e.g., 5 V or 3.3 V supply lines) without verifying that reverse conduction won't disrupt bias conditions. Always validate layout, grounding, and transient path integrity before substitution, as P6SMB33CAHM3_B/H conducts in both directions above VBR.
P6SMB33CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for P6SMB33CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHM3_B/H 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_B/H reliable?
The price and inventory of P6SMB33CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHM3_B/H?
P6SMB33CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHM3_B/H 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_B/H?
For technical support, including P6SMB33CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB33CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHM3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHM3_B/H?
All P6SMB33CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHM3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for P6SMB33CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHM3_B/H Tags
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