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Vishay General Semiconductor - Diodes Division P6SMB47CAHM3_A/I
- Part No.:
- P6SMB47CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB47CAHM3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB47CAHM3_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 or power lines. It features a 47 V standoff voltage (VWM), 64.8 V maximum clamping voltage at 9.3 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB47CAHM3_A/I datasheet, P6SMB47CAHM3_A/I pinout, P6SMB47CAHM3_A/I application, or P6SMB47CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMB (DO-214AA) package thermal performance, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical breakdown (VBR min/max = 44.7–49.4 V at 1 mA), clamping (VC = 64.8 V at IPPM = 9.3 A), and leakage (ID ≤ 1.0 μA at VWM = 40.2 V) characteristics across reverse and forward directions. Its glass-passivated junction ensures stable avalanche behavior under repetitive transient stress.
The device is rated for 150 °C maximum junction temperature, exhibits 0.101 %/°C temperature coefficient of VBR, and achieves thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads - enabling reliable operation in high-temperature automotive engine bay or industrial control environments without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 40.2 V - maximum continuous reverse voltage before clamping initiates; defines safe operating margin below system rail. |
| VBR (Breakdown) | 44.7–49.4 V at 1 mA - precise symmetric avalanche onset threshold in both directions; ensures predictable turn-on timing. |
| VC (Clamping) | 64.8 V at 9.3 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge; determines downstream IC survivability. |
| PPPM | 600 W - peak transient energy absorption capacity; supports EN 61000-4-5 Level 4 (4 kV line-to-line) compliance. |
| ID (Leakage) | ≤1.0 μA at VWM - negligible standby power loss and signal integrity impact on high-impedance sensor lines. |
| TJ max | 150 °C - enables deployment in under-hood automotive modules and industrial motor drives without derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical low-impedance avalanche path in either direction; no DC bias dependency - ideal for AC-coupled or floating signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC signal paths (e.g., RS-485, CAN, sensor bridges) without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive applications including powertrain sensors and body electronics - meets lifetime reliability and environmental stress requirements. |
| 600 W peak pulse rating | Withstands repeated 10/1000 μs surges up to 9.3 A - sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 combination wave testing. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V/5 V logic and precision analog front-ends. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs in engine control units against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to limit transient voltage before reaching ASIC input pins. Use Value: Maintains signal integrity under ISO 16750-2 load dump (120 V/1 s) and prevents latch-up in 5 V sensor interface ICs. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V industrial field wiring exposed to relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Fast-response shunt suppressor mounted adjacent to optocoupler input to clamp transients before isolation barrier. Use Value: Limits voltage to ≤64.8 V during 1 kV/500 A surge (IEC 61000-4-5), ensuring optocoupler CMTI and long-term insulation reliability. |
| RS-485 Data Line Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding half-duplex RS-485 transceivers in building automation systems from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Symmetric TVS pair (one per line) referenced to common-mode ground to suppress differential and common-mode transients. Use Value: Clamps differential surge to <130 V while preserving signal swing margin for ±7 V receiver thresholds - avoids false triggering. |
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: Low-capacitance shunt device across motor terminals to absorb inductive kickback before it couples into MCU power rails. Use Value: Prevents brownout resets and flash corruption in 32-bit MCUs by limiting 400 V spikes to 64.8 V within <1 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47CA | Same VWM (40.2 V) and VC (64.8 V), but lower PPPM (400 W); SMB package replaced by smaller SMA (DO-214AC). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 line surges. | Select when board space is constrained and surge threat level is limited to contact ESD (<15 kV) and low-duty-cycle switching noise. |
| SMCJ47CA | Higher PPPM (1500 W), same VWM/VC, but larger SMC (DO-214AB) package; higher thermal mass and RθJA = 35 °C/W. | Supports sustained surge duty cycles and higher ambient temperatures (>105 °C); requires larger PCB footprint. | Choose for harsh environments (e.g., solar inverters, railway controls) where 600 W is insufficient and layout allows SMC footprint. |
Compared with SMAJ47CA and SMCJ47CA, P6SMB47CAHM3_A/I delivers optimal balance of 600 W surge handling, AEC-Q101 qualification, and compact SMB footprint - making it the preferred choice for space-constrained automotive and industrial modules requiring certified reliability and mid-tier surge immunity.
Availability
P6SMB47CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, RS-485 interface hardening, and consumer appliance motor drive circuits requiring stable component supply and AEC-Q101 traceability.
Supply support for P6SMB47CAHM3_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, efficiency, and application-specific optimization.
The P6SMB series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for fast response, stable clamping, and robust thermal performance in surface-mount designs.
FAQ
What does the "CA" suffix indicate in P6SMB47CAHM3_A/I?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB47CAHM3_A/I provides symmetrical transient suppression in both polarities, unlike unidirectional variants (e.g., P6SMB47AHM3_A/I). This eliminates polarity sensitivity during PCB assembly and supports AC-coupled or floating signal lines such as RS-485, CAN, or bridge sensor outputs. The device has identical VBR, VC, and ID specifications in forward and reverse directions.
Is P6SMB47CAHM3_A/I qualified for automotive use?
Yes, P6SMB47CAHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD47, making it suitable for engine control units, body electronics, and ADAS sensor modules where automotive-grade reliability is mandatory.
What is the maximum clamping voltage of P6SMB47CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of P6SMB47CAHM3_A/I is 64.8 V at 9.3 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and represents the highest voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream 5 V or 3.3 V ICs remain within absolute maximum ratings.
How does the SMB (DO-214AA) package of P6SMB47CAHM3_A/I compare thermally to larger packages?
P6SMB47CAHM3_A/I in the SMB (DO-214AA) package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads. While larger packages like SMC (RθJA ≈ 35 °C/W) offer better heat dissipation, the SMB footprint enables high-density layouts and remains effective for short-duration transients (e.g., 10/1000 μs) where thermal mass is less critical than response speed and board area efficiency.
Does P6SMB47CAHM3_A/I require orientation during PCB placement?
No, P6SMB47CAHM3_A/I does not require specific orientation during placement because it is a bidirectional TVS diode with no polarity marking on the SMB package. Unlike unidirectional variants that feature a cathode band, P6SMB47CAHM3_A/I conducts identically in both directions - simplifying automated assembly and eliminating risk of reverse installation errors in differential or AC signal protection schemes.
P6SMB47CAHM3_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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
P6SMB47CAHM3_A/I FAQ
1.How can I place an order for P6SMB47CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB47CAHM3_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 P6SMB47CAHM3_A/I reliable?
The price and inventory of P6SMB47CAHM3_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 P6SMB47CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB47CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB47CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB47CAHM3_A/I?
P6SMB47CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB47CAHM3_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 P6SMB47CAHM3_A/I?
For technical support, including P6SMB47CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB47CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB47CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB47CAHM3_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 P6SMB47CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB47CAHM3_A/I?
All P6SMB47CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB47CAHM3_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 P6SMB47CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB47CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB47CAHM3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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