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Vishay General Semiconductor - Diodes Division P6SMB33CAHM3_A/H
- Part No.:
- P6SMB33CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHM3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,737
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Product details
Overview
P6SMB33CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 33 V standoff voltage (VWM), 45.7 V maximum clamping voltage at 13.1 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive-grade reliability.
For engineers reviewing the P6SMB33CAHM3_A/H datasheet, P6SMB33CAHM3_A/H pinout, P6SMB33CAHM3_A/H application, or P6SMB33CAHM3_A/H equivalent, this device serves as a robust, low-profile protection solution for bidirectional signal lines in automotive sensor interfaces, industrial I/O modules, and telecom line cards where fast response (<1 ns), low clamping ratio, and MSL Level 1 reflow compatibility are critical.
Technical Context
The P6SMB33CAHM3_A/H operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown voltage range of 31.4–34.7 V at 1 mA test current. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
Thermally, it exhibits a junction-to-ambient thermal resistance of 100 °C/W and a junction-to-lead resistance of 20 °C/W, enabling effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal. It supports surge currents up to 13.1 A (10/1000 μs) with ≤0.1 % duty cycle and maintains operation across -65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| 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 IC survivability. |
| PPPM (Peak Pulse Power) | 600 W - Sustains single 10/1000 μs surges without degradation; validated per Fig. 1 derating curves. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR; no cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional transient suppression | Clamps both polarities equally - eliminates need for dual unidirectional devices in AC-coupled or differential signal paths. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces - meets stress testing per JESD22-A108. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A Tier 1 reporting requirements - supports green manufacturing and end-of-life compliance. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - enables single-pass lead-free assembly without moisture sensitivity concerns. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients - improves protection margin for sensitive CMOS inputs. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load-dump and ESD events in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Withstands 13.1 A surges while limiting clamped voltage to 45.7 V - ensures transceiver survival under ISO 7637-2 Pulse 1/2/5a stress profiles. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input line to clamp inductive kickback from solenoid/relay coils. Use Value: 600 W peak power rating handles repetitive 10/1000 μs transients common in factory automation; low leakage avoids false triggering. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control Board |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers on telecom access equipment from lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protection device on line-side traces, coordinated with GDT or MOV secondary stages. Use Value: Fast <1 ns response time and 45.7 V clamping enable compliance with ITU-T K.21 basic protection level for class B equipment. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb back-EMF energy during PWM switching. Use Value: 150 °C max junction temperature supports operation near heat-generating motor drivers; SMB package fits tight board space constraints. |
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 (28.2 V) and VC (45.7 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Less robust for high-energy surges; suitable only for low-duty-cycle or secondary protection layers. | Select SMAJ33CA only if board space is constrained and surge threat level is limited to IEC 61000-4-2 Level 3. |
| 1.5KE33CA | Higher PPPM (1500 W), axial-leaded DO-201 package; larger size, manual assembly required; VWM = 28.2 V, VC = 49.9 V. | Not SMT-compatible; used in legacy through-hole designs or high-power primary protection stages. | Choose 1.5KE33CA only when PCB layout allows axial components and system-level surge immunity requires >600 W handling. |
Compared with SMAJ33CA and 1.5KE33CA, the P6SMB33CAHM3_A/H uniquely balances 600 W surge capability, SMB SMT compatibility, AEC-Q101 qualification, and halogen-free compliance - making it the optimal choice for new automotive and industrial designs requiring automated assembly and extended temperature operation.
Availability
P6SMB33CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB33CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for consistent clamping behavior, low leakage, and robust surge endurance under real-world thermal and mechanical stress.
FAQ
What is the breakdown voltage range of the P6SMB33CAHM3_A/H?
The P6SMB33CAHM3_A/H has a breakdown voltage (VBR) range of 31.4 V to 34.7 V at a test current of 1 mA, as specified in the Vishay datasheet (Document Number: 88370, Rev. 09-Jan-2024). This range confirms its suitability for bidirectional clamping around a nominal 33 V standoff, and the P6SMB33CAHM3_A/H must be selected based on this verified VBR window for accurate overvoltage protection design.
Is the P6SMB33CAHM3_A/H suitable for automotive applications?
Yes, the P6SMB33CAHM3_A/H is AEC-Q101 qualified (indicated by the "HM3" suffix and "_B/H" ordering code variant), meaning it has passed stress tests for temperature cycling, humidity bias, and mechanical shock required for automotive electronics. The P6SMB33CAHM3_A/H is explicitly rated for under-hood and cabin module use with full -65 °C to +150 °C operating range and MSL Level 1 reflow compatibility.
What does the "CA" suffix mean in P6SMB33CAHM3_A/H?
The "CA" suffix in P6SMB33CAHM3_A/H denotes a bidirectional configuration - the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P6SMB33A), the P6SMB33CAHM3_A/H has no polarity marking and functions identically across either terminal, making it ideal for AC signal lines, differential buses, and floating ground systems.
What is the maximum clamping voltage of the P6SMB33CAHM3_A/H at rated surge current?
The P6SMB33CAHM3_A/H has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 13.1 A, measured using the standard 10/1000 μs double-exponential waveform. This value is critical for ensuring downstream ICs remain within their absolute maximum ratings during surge events, and the P6SMB33CAHM3_A/H delivers this performance consistently across its qualified temperature and lifetime operating conditions.
Does the P6SMB33CAHM3_A/H require special PCB layout considerations?
Yes - for optimal thermal and electrical performance, the P6SMB33CAHM3_A/H should be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, as specified in the Vishay datasheet. This pad area reduces thermal resistance and sustains its 600 W peak pulse rating; smaller pads will cause premature thermal failure. The P6SMB33CAHM3_A/H also benefits from short, direct routing to protected nodes to minimize inductance and preserve clamping speed.
P6SMB33CAHM3_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:
- 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/H FAQ
1.How can I place an order for P6SMB33CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHM3_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 P6SMB33CAHM3_A/H reliable?
The price and inventory of P6SMB33CAHM3_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 P6SMB33CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHM3_A/H?
P6SMB33CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHM3_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 P6SMB33CAHM3_A/H?
For technical support, including P6SMB33CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB33CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHM3_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 P6SMB33CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHM3_A/H?
All P6SMB33CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHM3_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 P6SMB33CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB33CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHM3_A/H Tags
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