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Vishay General Semiconductor - Diodes Division P6SMB9.1CA-M3/5B
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- Part No.:
- P6SMB9.1CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB9.1CA-M3/5B.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,112
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Product details
Overview
P6SMB9.1CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 9.1 V standoff voltage (VWM), 13.4 V maximum clamping voltage (VC) at 44.8 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB9.1CA-M3/5B datasheet, P6SMB9.1CA-M3/5B pinout, P6SMB9.1CA-M3/5B application, or P6SMB9.1CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.47), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via optional _B revision.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while low incremental surge resistance minimizes voltage overshoot during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, supporting reliable operation in compact PCB layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.78 V - maximum continuous reverse voltage before significant leakage; defines safe operating window for protected circuitry |
| VBR (Breakdown Voltage) | 8.65–9.55 V at 1.0 mA - sharp, repeatable avalanche onset ensuring predictable clamping threshold |
| VC (Clamping Voltage) | 13.4 V at 44.8 A IPPM - limits transient voltage seen by downstream components during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 600 W - sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| ID (Max Reverse Leakage) | 50 μA at VWM - negligible standby current draw, critical for battery-powered sensor interfaces |
| Package | SMB (DO-214AA) - industry-standard SMT footprint (5.59 mm × 4.06 mm × 2.20 mm), compatible with automated placement and reflow |
| Temperature Range | −65 °C to +150 °C - supports under-hood automotive and industrial environments without derating |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without external polarity management |
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump and inductive switching surges per ISO 7637-2 without degradation |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC J-STD-020 MSL Level 1 reflow profile (260 °C peak) |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V and 5 V logic interfaces |
| AEC-Q101 qualification option (_B suffix) | Supports automotive-grade reliability validation (HTOL, TCT, ESD HBM ≥ 8 kV) without redesigning board layout |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching ADC input stage. Use Value: Limits induced voltage to ≤13.4 V during 100 V/50 ms load dump events, preserving 12-bit ADC accuracy and preventing latch-up. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Primary transient suppressor on each optocoupler input line, mounted adjacent to terminal block. Use Value: Clamps 4 kV contact ESD (IEC 61000-4-2) within <1 ns, maintaining >10⁶ cycle reliability without upstream series impedance. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding RS-485 transceivers in building automation gateways connected to long outdoor data runs. IC Role / Device Role / Timing Role: Common-mode TVS on differential pair, referenced to local ground, handling induced lightning surges. Use Value: Absorbs 600 W common-mode surge energy (10/1000 μs) while maintaining signal integrity up to 10 Mbps due to low junction capacitance (~200 pF). |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart washing machine control boards. IC Role / Device Role / Timing Role: Across-motor terminals to clamp inductive turn-off transients before reaching H-bridge MOSFETs. Use Value: Limits drain-source voltage overshoot to 13.4 V, eliminating need for snubbers and reducing MOSFET SOA stress by 35%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Unidirectional; 9.0 V VWM; 14.4 V VC at 41.7 A; same SMB package | Requires polarity-aware layout; unsuitable for AC or differential lines without additional diodes | Select only when protecting unidirectional DC rails where polarity is fixed and cost is prioritized over design flexibility |
| SMCJ9.0CA | Bidirectional; 9.0 V VWM; 14.4 V VC at 119 A; larger SMC (DO-214AB) package | Higher surge rating but requires 30% more PCB area; not drop-in compatible with SMB footprints | Choose when system-level surge immunity exceeds 100 A IPPM and board space allows SMC footprint |
Compared with SMAJ9.0A and SMCJ9.0CA, P6SMB9.1CA-M3/5B delivers optimal balance of bidirectional protection, SMB footprint compatibility, and 44.8 A surge capacity - making it the preferred choice for space-constrained, polarity-agnostic designs in automotive and industrial control.
Availability
P6SMB9.1CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer appliance motor controls requiring stable component supply and halogen-free compliance.
Supply support for P6SMB9.1CA-M3/5B 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets robust transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 readiness are mandatory.
FAQ
What does the "CA" suffix indicate in P6SMB9.1CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: the P6SMB9.1CA-M3/5B conducts and clamps symmetrically in both polarities, enabling protection of AC signals, differential buses, or polarity-agnostic DC lines without orientation constraints. This differs from unidirectional "A" variants like P6SMB9.1A-M3/5B, which require correct cathode/anode placement.
Is P6SMB9.1CA-M3/5B suitable for automotive applications?
Yes - the base P6SMB9.1CA-M3/5B is halogen-free and RoHS-compliant; an AEC-Q101 qualified version is available as P6SMB9.1CAHM3_B/5B (with "_B" revision code). That variant undergoes HTOL, temperature cycling, and ESD testing per AEC-Q101, making P6SMB9.1CA-M3/5B a direct upgrade path for automotive designs requiring qualification.
How does the clamping voltage of P6SMB9.1CA-M3/5B compare to its standoff voltage?
The P6SMB9.1CA-M3/5B has a 7.78 V standoff voltage (VWM) and a maximum clamping voltage (VC) of 13.4 V at 44.8 A, yielding a clamping ratio of 1.72. This tight ratio ensures protected circuits experience minimal overvoltage - critical for safeguarding 5 V or 3.3 V logic interfaces without overstressing downstream ICs during transients.
What is the thermal resistance of P6SMB9.1CA-M3/5B, and how does it affect layout?
P6SMB9.1CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under 600 W surge conditions, ensure adequate copper pour and avoid thermal isolation - no heatsink is needed for single-pulse events, but repeated surges require thermal derating per Figure 2 in the datasheet.
Can P6SMB9.1CA-M3/5B replace older P6KE9.1CA parts on existing PCBs?
Yes - P6SMB9.1CA-M3/5B uses the SMB (DO-214AA) package, while P6KE9.1CA uses the larger DO-15 axial package. Though not footprint-compatible, the P6SMB9.1CA-M3/5B offers superior surge capability (600 W vs. 600 W), lower clamping voltage (13.4 V vs. 14.5 V), and SMT compatibility. A board redesign is required, but the P6SMB9.1CA-M3/5B delivers better performance and manufacturability in new layouts.
P6SMB9.1CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 44.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB9.1CA-M3/5B FAQ
1.How can I place an order for P6SMB9.1CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB9.1CA-M3/5B 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 P6SMB9.1CA-M3/5B reliable?
The price and inventory of P6SMB9.1CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB9.1CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB9.1CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB9.1CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB9.1CA-M3/5B?
P6SMB9.1CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB9.1CA-M3/5B 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 P6SMB9.1CA-M3/5B?
For technical support, including P6SMB9.1CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB9.1CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB9.1CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB9.1CA-M3/5B 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 P6SMB9.1CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB9.1CA-M3/5B?
All P6SMB9.1CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB9.1CA-M3/5B, 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 P6SMB9.1CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB9.1CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB9.1CA-M3/5B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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