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Vishay General Semiconductor - Diodes Division P6SMB36CAHM3_A/I
- Part No.:
- P6SMB36CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB36CAHM3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB36CAHM3_A/I 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 and power lines. It features a 36 V standoff voltage (VWM), 49.9 V maximum clamping voltage at 12.0 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform. It is halogen-free, RoHS-compliant, AEC-Q101 qualified, and used in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P6SMB36CAHM3_A/I datasheet, P6SMB36CAHM3_A/I pinout, P6SMB36CAHM3_A/I application, or P6SMB36CAHM3_A/I equivalent, key selection considerations include bidirectional clamping behavior, 36 V reverse standoff rating, 49.9 V clamping performance under 12 A surge, SMB (DO-214AA) package compatibility, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering identical clamping characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast transient suppression without thermal runaway.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 10/1000 μs waveform response enables robust protection against ESD, lightning-induced surges, and inductive switching transients in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 30.8 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (Breakdown) | 34.2 V to 37.8 V at 1.0 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events |
| VC (Clamping) | 49.9 V at IPPM = 12.0 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for downstream IC survivability |
| PPPM | 600 W - Sustained transient energy absorption capacity per single 10/1000 μs pulse at 0.01% duty cycle |
| ID (Leakage) | <1.0 μA at 30.8 V - Minimal DC loading on signal/power lines during normal operation, preserving signal integrity |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for automated assembly |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | Accepts surge current during negative-going transients; forms one half of symmetrical clamping path |
| Cathode | Transient current entry (forward bias) | Accepts surge current during positive-going transients; completes bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive systems without degradation |
| AEC-Q101 qualification | Validated for temperature cycling, HTRB, and mechanical shock per automotive reliability standards |
| Halogen-free & RoHS | Complies with EU Directive 2011/65/EU and JEDEC J-STD-20 MSL Level 1 reflow profile (260 °C peak) |
| Low clamping ratio (VC/VWM) | 1.62 - Tight voltage margin between standoff and clamping ensures minimal overvoltage exposure to protected ICs |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or IC input pins to shunt transients before they reach sensitive analog front-ends. Use Value: Maintains 30.8 V system operating margin while limiting surge-induced voltage to ≤49.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor interfaces. |
Use Scenario: Safeguarding RS-485/RS-232 communication ports and PLC digital inputs against field-induced surges in factory automation equipment. IC Role / Device Role / Timing Role: Primary transient suppressor on differential pair or single-ended signal line, mounted adjacent to connector for shortest possible path to ground. Use Value: Absorbs up to 600 W of surge energy with sub-nanosecond response, preserving signal fidelity and enabling compliance with IEC 61000-4-5 Level 4 (4 kV) immunity testing. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 12 V/24 V DC outputs of wall adapters and PoE injectors exposed to accidental AC mains coupling. IC Role / Device Role / Timing Role: Clamp device placed after DC-DC converter output filter to limit transient overshoot during fault conditions. Use Value: Limits output voltage excursion to 49.9 V during 10/1000 μs surges, protecting downstream USB-PD controllers and battery management ICs rated for ≤36 V absolute maximum. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges entering via RJ-45 jacks in central office and CPE equipment. IC Role / Device Role / Timing Role: First-stage protector on twisted-pair lines, coordinated with gas discharge tubes (GDTs) for multi-stage surge handling. Use Value: Provides low-clamp, fast-response stage with 1.0 μA leakage at 30.8 V, minimizing standby power loss while meeting GR-1089-CORE Zone 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Same VWM (30.8 V) and VC (49.9 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤400 W; verify thermal derating on small pads |
| SMCJ36CA | Higher PPPM (1500 W), same VWM/VC, larger SMC (DO-214AB) package; 2× footprint area and 30% lower RθJA | Overqualified for 600 W needs; adds cost and layout area where not required | Choose only if future design scalability to higher surge levels is needed or existing SMC footprint is standardized |
Compared with SMAJ36CA and SMCJ36CA, P6SMB36CAHM3_A/I delivers optimal balance of 600 W surge handling, SMB footprint efficiency, and AEC-Q101 qualification-making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability without overengineering.
Availability
P6SMB36CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O cards, and telecom line protection requiring stable component supply, AEC-Q101 traceability, and consistent SMB package form factor.
Supply support for P6SMB36CAHM3_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 reliability and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and communications systems, with design focus on bidirectional clamping, AEC-Q101 qualification, and compatibility with automated SMT assembly processes.
FAQ
What is the maximum clamping voltage of P6SMB36CAHM3_A/I under surge conditions?
The P6SMB36CAHM3_A/I has a maximum clamping voltage (VC) of 49.9 V at 12.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping performance remains consistent across both polarities due to its bidirectional construction, and the 49.9 V VC ensures compatibility with 36 V-rated downstream components in automotive and industrial applications.
Is P6SMB36CAHM3_A/I suitable for automotive applications?
Yes, P6SMB36CAHM3_A/I is AEC-Q101 qualified and specifically designed for automotive use. Its halogen-free, RoHS-compliant construction, 150 °C maximum junction temperature rating, and validation across temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock make it appropriate for engine control units, ADAS sensor interfaces, and body electronics. The "HM3" suffix confirms AEC-Q101 qualification and halogen-free material content, as documented in Vishay's official ordering information.
What does the "CA" suffix indicate in P6SMB36CAHM3_A/I?
The "CA" suffix in P6SMB36CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., P6SMB36A), the CA version has no cathode marking and functions identically regardless of PCB orientation. This eliminates polarity concerns during placement and simplifies layout for AC-coupled or floating signal paths-common in CAN, LIN, and RS-485 interfaces where P6SMB36CAHM3_A/I is frequently deployed.
What is the thermal resistance of P6SMB36CAHM3_A/I, and how does it affect PCB layout?
P6SMB36CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad area increases thermal impedance and risks exceeding the 150 °C maximum junction temperature during repetitive surges. For reliable operation, maintain full copper coverage under both terminals and avoid narrow traces or thermal reliefs that impede heat dissipation.
How does P6SMB36CAHM3_A/I compare to unidirectional P6SMB36AHM3_A/I in circuit implementation?
P6SMB36CAHM3_A/I differs from the unidirectional P6SMB36AHM3_A/I by providing symmetrical clamping in both directions, eliminating the need for polarity-aware placement and enabling use on AC or floating nodes. While both share identical VWM (30.8 V), VBR (34.2–37.8 V), and VC (49.9 V), only the unidirectional variant specifies IFSM (100 A) and forward voltage (VF = 3.5 V at 50 A). Therefore, P6SMB36CAHM3_A/I is preferred for bidirectional signal lines, whereas the unidirectional version suits DC power rail protection where forward conduction may occur.
P6SMB36CAHM3_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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P6SMB36CAHM3_A/I FAQ
1.How can I place an order for P6SMB36CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB36CAHM3_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 P6SMB36CAHM3_A/I reliable?
The price and inventory of P6SMB36CAHM3_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 P6SMB36CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB36CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB36CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB36CAHM3_A/I?
P6SMB36CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB36CAHM3_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 P6SMB36CAHM3_A/I?
For technical support, including P6SMB36CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB36CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB36CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB36CAHM3_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 P6SMB36CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB36CAHM3_A/I?
All P6SMB36CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB36CAHM3_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 P6SMB36CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB36CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB36CAHM3_A/I Tags
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