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Vishay General Semiconductor - Diodes Division P6SMB33CAHE3_A/H
- Part No.:
- P6SMB33CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,800
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Product details
Overview
P6SMB33CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 33 V standoff voltage (VWM), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed for surge protection on automotive sensor signal lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the P6SMB33CAHE3_A/H datasheet, P6SMB33CAHE3_A/H pinout, P6SMB33CAHE3_A/H application, or P6SMB33CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding its breakdown threshold (VBR = 31.4–34.7 V), it switches from high-impedance to low-impedance state within <1 ps, diverting surge current away from downstream ICs while maintaining clamping voltage ≤45.7 V at 13.1 A. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and repeatable avalanche behavior.
Designed for unclamped inductive switching transients and lightning-induced surges, the P6SMB33CAHE3_A/H sustains repetitive 600 W pulses at 0.01% duty cycle, with thermal derating above 25 °C per Fig. 2 and junction temperature limited to 150 °C. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 28.2 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 31.4–34.7 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on during transients. |
| VC (Clamping) | 45.7 V at 13.1 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge. |
| PPPM | 600 W - Surge energy handling capacity under standardized 10/1000 μs waveform; enables robustness against IEC 61000-4-5 Level 4 surges. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper pads without heatsink. |
| TJ max | 150 °C - Maximum allowable junction temperature; permits operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; molded compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Acts as cathode during positive transients; conducts surge current into ground path when voltage exceeds VBR. |
| Cathode | Transient current sink (bidirectional) | Acts as anode during negative transients; completes low-impedance shunt path for reverse-polarity surges. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± polarity transients - eliminates need for dual-device protection schemes. |
| 600 W peak pulse power | Handles IEC 61000-4-5 4 kV/2 Ω surge test waveforms without degradation when mounted on 5 mm × 5 mm copper pads. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensor interfaces, and body electronics modules. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system-level immunity margin. |
| MSL Level 1 rating | Enables standard reflow soldering at peak 260 °C without moisture-related popcorning or delamination. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN 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: Shunt-type transient suppressor placed directly across signal line and ground, responding within picoseconds to clamp overvoltage before IC damage occurs. Use Value: Maintains signal integrity during 12 V/24 V system load dump events (ISO 16750-2) by limiting voltage to ≤45.7 V at 13.1 A, preserving transceiver functionality. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against ESD and field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp installed at connector interface to absorb ±1 kV contact ESD (IEC 61000-4-2) and 2 kV surge (IEC 61000-4-5). Use Value: Enables compliance with industrial EMC standards without external series impedance, due to symmetric clamping and low leakage (<1 μA). |
| Telecom Interface Protection | Consumer Power Adapter Protection |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS placed at board edge before signal conditioning filters, providing first-stage clamping before secondary protection stages. Use Value: Withstands repeated 600 W surges at 0.01% duty cycle, supporting long-term reliability in outdoor telecom equipment exposed to frequent atmospheric transients. |
Use Scenario: Securing AC-DC adapter secondary-side outputs (e.g., 5 V, 12 V rails) against output short-circuit transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional clamp minimizing signal distortion on regulated DC outputs. Use Value: Prevents latch-up or overvoltage damage to connected USB peripherals and microcontrollers during hot-plug or fault conditions. |
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/VC ratings but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients; less suitable for automotive load dump where 600 W capability is required. | Select SMAJ33CA only for space-constrained consumer designs with verified lower surge exposure. |
| SMCJ33CA | Higher PPPM (1500 W); larger SMC package (DO-214AB); identical VWM/VC and AEC-Q101 qualification. | Overqualified for most 33 V signal-line protection; adds cost and board area without functional benefit unless >600 W margin is mandated. | Choose SMCJ33CA only when system-level testing confirms need for >600 W surge headroom or enhanced thermal margin. |
Compared with SMAJ33CA and SMCJ33CA, the P6SMB33CAHE3_A/H delivers optimal balance of 600 W surge capability, SMB footprint compatibility, AEC-Q101 validation, and thermal performance (RθJL = 20 °C/W) for mid-tier automotive and industrial signal-line protection.
Availability
P6SMB33CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom data line protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for P6SMB33CAHE3_A/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 reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, with design focus on standardized surge immunity (IEC/ISO), automated assembly compatibility, and extended temperature operation.
FAQ
What is the clamping voltage of P6SMB33CAHE3_A/H at its rated peak pulse current?
The P6SMB33CAHE3_A/H has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. The P6SMB33CAHE3_A/H maintains this clamping performance bidirectionally, ensuring consistent protection for both polarities of transient overvoltage.
Is P6SMB33CAHE3_A/H qualified for automotive applications?
Yes, P6SMB33CAHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in the Vishay ordering information table (page 3, document 88370). It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it suitable for under-hood and cabin electronics such as engine control sensors and ADAS camera interfaces. The P6SMB33CAHE3_A/H also meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements.
What is the standoff voltage (VWM) rating for P6SMB33CAHE3_A/H?
The standoff voltage (VWM) for P6SMB33CAHE3_A/H is 28.2 V, representing the maximum continuous reverse working voltage the device can sustain without exceeding 1 μA leakage current. This value is derived from the "MAXIMUM REVERSE LEAKAGE AT VWM" column in the electrical characteristics table (page 2, document 88370), where ID ≤ 1.0 μA is specified at VWM = 28.2 V. The P6SMB33CAHE3_A/H uses this margin to ensure reliable operation below its 31.4–34.7 V breakdown range during normal system operation.
Does P6SMB33CAHE3_A/H have polarity markings on the package?
No, P6SMB33CAHE3_A/H does not have polarity markings because it is a bidirectional TVS diode. As stated in the mechanical data section (page 1, document 88370), "no marking on bidirectional types." Its symmetrical construction allows identical clamping behavior for both positive and negative transients, eliminating the need for orientation-dependent placement. Engineers may verify correct mounting using continuity checks between terminals and reference ground planes, but visual identification of anode/cathode is not applicable for the P6SMB33CAHE3_A/H.
What is the thermal resistance from junction to lead (RθJL) for P6SMB33CAHE3_A/H?
The thermal resistance from junction to lead (RθJL) for P6SMB33CAHE3_A/H is 20 °C/W, as specified in the Thermal Characteristics table (page 3, document 88370). This parameter reflects the device's ability to conduct heat from the silicon junction to the PCB copper pads through its leads, independent of ambient air convection. The P6SMB33CAHE3_A/H leverages this low RθJL to maintain safe junction temperatures during repetitive 600 W surges, especially when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads.
P6SMB33CAHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB33CAHE3_A/H FAQ
1.How can I place an order for P6SMB33CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHE3_A/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 P6SMB33CAHE3_A/H reliable?
The price and inventory of P6SMB33CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHE3_A/H?
P6SMB33CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHE3_A/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 P6SMB33CAHE3_A/H?
For technical support, including P6SMB33CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHE3_A/H requirements.
6.How does Aetrix verify that P6SMB33CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHE3_A/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 P6SMB33CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHE3_A/H?
All P6SMB33CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHE3_A/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 P6SMB33CAHE3_A/H part is unused and in its original packaging.
Return procedure for P6SMB33CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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