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Vishay General Semiconductor - Diodes Division P6SMB91CAHM3_B/I
- Part No.:
- P6SMB91CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHM3_B/I.pdf
- Description:
- 600W,91V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
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Product details
Overview
P6SMB91CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 91 V breakdown voltage (VBR), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPPM), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability - deployed in sensor interface protection and DC power rail surge suppression.
For engineers reviewing the P6SMB91CAHM3_B/I datasheet, P6SMB91CAHM3_B/I pinout, P6SMB91CAHM3_B/I application, or P6SMB91CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, 125 V clamping voltage under 4.8 A surge, AEC-Q101 qualification status, SMB package thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5% min/max), low incremental surge resistance, and fast response time (<1 ns) to transient events.
The device delivers 600 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, derated linearly above 25 °C using RθJA = 100 °C/W. It supports repetitive surge duty cycle ≤0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 86.5–95.5 V at 1 mA test current - defines precise clamping onset threshold for overvoltage events |
| Clamping Voltage VC | 125 V at 4.8 A IPPM - maximum voltage seen by protected circuit during 600 W surge |
| Peak Pulse Power PPPM | 600 W (10/1000 μs waveform) - determines transient energy absorption capacity before failure |
| Stand-off Voltage VWM | 77.8 V - maximum continuous reverse working voltage without significant leakage |
| Max Reverse Leakage ID | 1 μA at VWM - ensures minimal power loss and signal integrity in standby operation |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout: 5.0 mm × 5.0 mm copper per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode band side) | Bidirectional symmetry means no functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Cathode | Terminal 2 (opposite cathode band) | No marking on bidirectional types; terminals are electrically identical and interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 Ω source impedance) without degradation |
| AEC-Q101 qualification (HM3) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Low profile SMB package | 0.220" (5.59 mm) length enables high-density PCB layouts while maintaining thermal performance via 5 mm² pads |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to limit transients before reaching PHY or MCU GPIO. Use Value: Clamps 77.8 V stand-off to 125 V at 4.8 A, preventing damage to 5 V or 3.3 V interface ICs while maintaining signal fidelity during normal operation. |
Use Scenario: Safeguarding CAN FD physical layer against ESD (IEC 61000-4-2 ±25 kV air) and surge (IEC 61000-4-5 2 kV line-earth) in factory automation nodes. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across CAN_H/CAN_L differential pair to absorb common-mode transients without distorting bit timing. Use Value: 125 V clamping ensures CAN transceivers (e.g., TCAN1042) remain within absolute max ratings during 600 W surges, preserving bus integrity and fault recovery. |
| DC Power Rail Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Secondary-side overvoltage protection on 24 V or 48 V DC power distribution networks in telecom rectifiers and PoE injectors. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting surge energy away from downstream DC-DC converters and PMICs during lightning-induced ring waves. Use Value: 600 W rating handles 10/1000 μs surges up to 4.8 A, while 77.8 V VWM allows safe operation with 24 V nominal rails and 30 % tolerance margins. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) in portable medical devices and smart home hubs subjected to user-handling discharge. IC Role / Device Role / Timing Role: Bidirectional clamp minimizing capacitance impact on 480 Mbps signaling while meeting IEC 61000-4-2 Level 4 immunity. Use Value: Symmetric clamping ensures equal protection regardless of ESD polarity, and 125 V VC prevents latch-up in USB transceivers operating at 3.3 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA | Unidirectional variant; same VBR range but lacks bidirectional symmetry; lower PPPM (400 W) | Requires polarity-aware placement; unsuitable for AC/differential lines without external biasing | Select only when unidirectional clamping suffices and board space allows larger SMA package |
| SMCJ90CA | Same bidirectional function but in larger SMC (DO-214AB) package; higher PPPM (1500 W); RθJA = 35 °C/W | Better thermal performance and surge margin, but occupies ~2.5× PCB area vs. SMB | Prefer for high-reliability industrial systems where 1500 W surge headroom justifies footprint cost |
Compared with SMAJ90CA and SMCJ90CA, P6SMB91CAHM3_B/I provides optimal balance of AEC-Q101 qualification, SMB footprint efficiency, and 600 W surge capability - making it the preferred choice for space-constrained automotive and industrial modules requiring bidirectional protection without layout redesign.
Availability
P6SMB91CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, DC power rail surge suppression, and consumer USB port ESD protection requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB91CAHM3_B/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, power efficiency, and automotive-grade validation.
The P6SMB Series targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 compliance, automated SMT compatibility, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of P6SMB91CAHM3_B/I at its rated peak pulse current?
The P6SMB91CAHM3_B/I has a maximum clamping voltage (VC) of 125 V at 4.8 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB91CAHM3_B/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C) with minimal drift due to its low VBR temperature coefficient (0.106 %/°C).
Is P6SMB91CAHM3_B/I suitable for automotive applications?
Yes, P6SMB91CAHM3_B/I is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed stress tests including high-temperature reverse bias, high-temperature operating life, and temperature cycling - specifically validated for under-hood and chassis-mounted automotive electronics. Its 150 °C maximum junction temperature, MSL Level 1 rating, and halogen-free construction make P6SMB91CAHM3_B/I appropriate for engine control units, ADAS camera modules, and body control modules.
How does the bidirectional configuration of P6SMB91CAHM3_B/I affect PCB layout?
The bidirectional nature of P6SMB91CAHM3_B/I eliminates polarity constraints: either terminal may connect to either side of a differential or AC-coupled line, simplifying layout and reducing risk of assembly error. Unlike unidirectional TVS diodes, P6SMB91CAHM3_B/I requires no cathode band orientation check during placement. Its SMB (DO-214AA) package uses symmetric 5.0 mm × 5.0 mm copper pads per terminal, and the absence of marking means no silkscreen polarity indicator is needed - streamlining design for CAN, LIN, or RS-485 interfaces.
What is the maximum steady-state power dissipation of P6SMB91CAHM3_B/I?
The P6SMB91CAHM3_B/I has a maximum steady-state power dissipation (PD) of 5.0 W at TA = 50 °C on an infinite heatsink. In typical PCB applications with 5.0 mm × 5.0 mm copper pads per terminal, its thermal resistance junction-to-ambient (RθJA) is 100 °C/W, meaning a 5 W dissipation would raise junction temperature by 500 °C above ambient - thus steady-state use is limited to leakage currents only. The P6SMB91CAHM3_B/I is intended for transient (not continuous) power handling, with 600 W specified only for short-duration 10/1000 μs pulses.
Does P6SMB91CAHM3_B/I meet industry surge immunity standards?
Yes, P6SMB91CAHM3_B/I supports compliance with IEC 61000-4-2 (ESD ±25 kV air), IEC 61000-4-4 (EFT 4 kV), and IEC 61000-4-5 (surge 2 kV line-earth, 1 kV line-line) when applied with proper PCB layout - including minimized trace inductance and direct connection to protected node. Its 600 W peak pulse rating and 125 V clamping voltage enable system-level pass-fail margin for Level 4 immunity testing. The P6SMB91CAHM3_B/I's AEC-Q101 qualification further confirms robustness against automotive-specific transients defined in ISO 7637-2 and ISO 16750-2.
P6SMB91CAHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- 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)
P6SMB91CAHM3_B/I FAQ
1.How can I place an order for P6SMB91CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHM3_B/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 P6SMB91CAHM3_B/I reliable?
The price and inventory of P6SMB91CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHM3_B/I?
P6SMB91CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHM3_B/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 P6SMB91CAHM3_B/I?
For technical support, including P6SMB91CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB91CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHM3_B/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 P6SMB91CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHM3_B/I?
All P6SMB91CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHM3_B/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 P6SMB91CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB91CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHM3_B/I Tags
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