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Vishay General Semiconductor - Diodes Division P6SMB36CAHM3_A/H
- Part No.:
- P6SMB36CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB36CAHM3_A/H.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,074
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Product details
Overview
P6SMB36CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V standoff voltage (VWM), 49.9 V clamping voltage at 12.0 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform-designed to protect automotive-grade signal lines and power rails in sensor units and control modules.
For engineers reviewing the P6SMB36CAHM3_A/H datasheet, P6SMB36CAHM3_A/H pinout, P6SMB36CAHM3_A/H application, or P6SMB36CAHM3_A/H equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance of 100 °C/W junction-to-ambient under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. It features glass-passivated junctions, low incremental surge resistance, and fast response time-enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients on bidirectional data or power paths.
Designed for automotive-grade reliability, P6SMB36CAHM3_A/H meets AEC-Q101 stress testing requirements and is qualified with HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-qualified construction. Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak temperature without moisture-related failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 34.2–37.8 V at 1 mA - Voltage at which device transitions into avalanche conduction; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 49.9 V at 12.0 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained surge energy handling capacity per single 10/1000 μs event; enables robust protection against IEC 61000-4-5 Level 3/4 surges. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient air on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
| ID (Leakage at VWM) | 1.0 μA - Reverse leakage current at rated stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional surge path | Connected to line being protected; forms symmetrical clamping path with cathode during either polarity transient. |
| Cathode | Current exit terminal in forward bias; common node for bidirectional surge path | Connected to reference plane (e.g., ground or supply rail); completes low-impedance shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics under temperature cycling, humidity, and mechanical stress tests. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial manufacturing without compromising surge performance. |
| 600 W peak pulse power (10/1000 μs) | Provides sufficient energy absorption to suppress common-mode surges per ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 waveforms. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping-critical for protecting 3.3 V or 5 V logic interfaces adjacent to protected lines. |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without pre-baking, reducing assembly complexity and cost. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and outputs from load dump and inductive switching transients in vehicle door modules and seat control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential bus lines or between signal and ground to limit transient voltage excursions. Use Value: Prevents latch-up or permanent damage to transceivers such as TJA1042 or SN65HVD230 when exposed to ISO 7637-2 Pulse 5a (load dump) up to 60 V. |
Use Scenario: Safeguarding RS-485 and CAN FD physical layer interfaces in factory automation controllers subjected to EFT and surge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor installed at connector entry point to shunt common-mode surges before reaching PHY IC. Use Value: Maintains signal integrity with <1.0 μA leakage at 30.8 V while clamping 12 A surges to ≤49.9 V-preserving timing margins in 5 Mbps CAN FD networks. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
|
Use Scenario: Secondary-side overvoltage protection in USB PD and Qi wireless charging adapters exposed to AC line transients coupled through transformer parasitics. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across regulated 12 V or 20 V output rails to clamp fast-rising spikes from flyback regulation instability. Use Value: Responds in <1 ns to transients exceeding 30.8 V, limiting peak excursion to 49.9 V and preventing damage to downstream DC-DC converters like MP2451. |
Use Scenario: Surge protection on -48 V DC telecom power feeds entering remote radio units and small cell base stations. IC Role / Device Role / Timing Role: Bidirectional clamp mounted between power and return lines to absorb longitudinal surges induced by lightning coupling on outdoor cabling. Use Value: Handles repetitive 600 W pulses with 0.01 % duty cycle-meeting GR-1089-CORE Level 3 surge immunity requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Same VWM (36 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select only where space constraints outweigh surge margin needs and thermal budget allows higher junction rise. |
| SMCJ36CA | Higher PPPM (1500 W); larger SMC package (DO-214AB); same VWM/VC specs | Better suited for primary-side AC/DC input protection or high-energy industrial motor drives | Choose when system-level surge test levels exceed 600 W or when board layout permits larger 7.11 mm × 6.22 mm footprint. |
Compared with SMAJ36CA and SMCJ36CA, P6SMB36CAHM3_A/H delivers optimal balance of automotive qualification, 600 W surge capability, and SMB footprint-making it ideal for space-constrained, high-reliability bidirectional line protection where AEC-Q101 compliance and halogen-free materials are mandatory.
Availability
P6SMB36CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for P6SMB36CAHM3_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, efficiency, and application-specific optimization.
The P6SMB Series targets high-surge, surface-mount transient suppression in automotive, industrial, and communications systems-designed to replace older axial-leaded TVS devices while meeting stringent AEC-Q101 and RoHS requirements.
FAQ
What does the "CA" suffix indicate in P6SMB36CAHM3_A/H?
The "CA" suffix in P6SMB36CAHM3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P6SMB36A), P6SMB36CAHM3_A/H has no polarity marking and functions identically regardless of voltage polarity-essential for protecting AC-coupled or differential signal lines such as CAN or RS-485. This is confirmed in Vishay's P6SMB datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is P6SMB36CAHM3_A/H suitable for automotive applications?
Yes, P6SMB36CAHM3_A/H is explicitly qualified to AEC-Q101 standards, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and automotive-qualified). It undergoes rigorous stress testing including temperature cycling, humidity, and mechanical shock-validating its use in engine control units, ADAS sensors, and body electronics. The device's 150 °C maximum junction temperature and MSL Level 1 rating further support under-hood and high-reliability deployment scenarios.
What is the clamping voltage of P6SMB36CAHM3_A/H at its rated peak pulse current?
The clamping voltage (VC) of P6SMB36CAHM3_A/H is 49.9 V at 12.0 A peak pulse current (IPPM), measured using the standard 10/1000 μs double-exponential waveform. This value is specified in the Electrical Characteristics table of the Vishay P6SMB datasheet (Document Number: 88370, page 2) and represents the maximum voltage imposed on the protected circuit during a full-rated surge event-critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMB package of P6SMB36CAHM3_A/H compare thermally to larger packages like SMC?
P6SMB36CAHM3_A/H in SMB (DO-214AA) package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads, versus ~50 °C/W for SMC-packaged equivalents like SMCJ36CA. This means P6SMB36CAHM3_A/H requires stricter thermal management in high-duty-cycle applications-but remains appropriate for single-event surge protection where average power dissipation is negligible. Derating curves in Figure 2 of the datasheet confirm usable operation up to +125 °C ambient at reduced pulse repetition rates.
Can P6SMB36CAHM3_A/H be used in place of unidirectional P6SMB36AHM3_A/H?
No-P6SMB36CAHM3_A/H is bidirectional and lacks polarity marking, while P6SMB36AHM3_A/H is unidirectional with cathode band identification. Substituting them without circuit review risks improper clamping behavior: the unidirectional part blocks reverse current until breakdown, whereas the bidirectional version conducts symmetrically. Use P6SMB36CAHM3_A/H only where bidirectional protection is required (e.g., differential buses); for DC power rail protection, verify polarity alignment and consider forward voltage drop (VF = 3.5 V at 50 A, unidirectional only).
P6SMB36CAHM3_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):
- 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/H FAQ
1.How can I place an order for P6SMB36CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB36CAHM3_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 P6SMB36CAHM3_A/H reliable?
The price and inventory of P6SMB36CAHM3_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 P6SMB36CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB36CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB36CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB36CAHM3_A/H?
P6SMB36CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB36CAHM3_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 P6SMB36CAHM3_A/H?
For technical support, including P6SMB36CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB36CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB36CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB36CAHM3_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 P6SMB36CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB36CAHM3_A/H?
All P6SMB36CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB36CAHM3_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 P6SMB36CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB36CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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