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Vishay General Semiconductor - Diodes Division P6SMB91CAHM3_A/H
- Part No.:
- P6SMB91CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHM3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,457
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Product details
Overview
P6SMB91CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 77.8 V stand-off voltage (VWM), 86.5–95.5 V breakdown voltage (VBR) at 1 mA, 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P6SMB91CAHM3_A/H datasheet, P6SMB91CAHM3_A/H pinout, P6SMB91CAHM3_A/H application, or P6SMB91CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), low incremental surge resistance, and compatibility with automated SMT assembly on PCBs requiring robust ESD and lightning surge immunity per IEC 61000-4-2/4-5.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 77.8 V), then rapidly avalanches below 125 V to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown and long-term reliability across -65 °C to +150 °C operating range.
The SMB package enables compact board layout with 0.2" × 0.2" copper pad thermal management, while MSL Level 1 rating and matte tin-plated leads support lead-free reflow up to 260 °C peak. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction for automotive-grade deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 77.8 V - Maximum continuous reverse working voltage before significant conduction begins; defines safe operating margin for protected line. |
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - Tight breakdown window ensures predictable turn-on during transients without premature triggering. |
| VC @ IPPM | 125 V at 4.8 A - Clamping voltage limits stress on downstream components during 600 W 10/1000 µs surge events. |
| PPPM | 600 W - Peak pulse power handling capacity per standard 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 3 surges. |
| IPPM | 4.8 A - Peak pulse current capability derived from VC and PPPM; determines minimum trace width and fuse coordination. |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.2 mm height and 3.94 mm length; compatible with JEDEC MS-012AC footprint. |
Pinout & Package
SMB (DO-214AA) package: molded plastic body with two coplanar matte tin-plated terminals; no polarity marking for bidirectional configuration; mounted on 5.0 mm × 5.0 mm copper pads per terminal for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage events relative to cathode reference. |
| Cathode | Transient return path (bidirectional) | Connects to protected line; symmetric conduction with anode enables clamping of both polarities without external circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and infotainment power rails. |
| 600 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 1 kV open-circuit / 0.5 kV short-circuit test levels. |
| MSL Level 1, 260 °C peak | Permits standard lead-free reflow soldering without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over 10+ year field life in harsh thermal cycling environments. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load dump and ESD in engine bay modules. IC Role / Device Role / Timing Role: Shunt TVS device placed directly at connector entry point to clamp fast transients before reaching signal conditioning ICs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V analog front-ends by limiting voltage excursion to ≤125 V during 10/1000 µs surges. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across input terminals to suppress common-mode transients induced by nearby 48 V DC solenoid drivers. Use Value: Maintains signal integrity by holding input voltage within ±125 V envelope, avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Telecom Line Card Protection | Consumer USB Port ESD |
Use Scenario: Shielding Ethernet PHY interface traces on telecom line cards from lightning-induced surges entering via RJ45 jacks. IC Role / Device Role / Timing Role: Primary-level TVS placed before common-mode chokes to absorb bulk surge energy before differential receivers. Use Value: Enables compliance with GR-1089-CORE Level 3 (10/1000 µs, 1 kV) without adding series impedance that degrades signal integrity. |
Use Scenario: Adding secondary-level surge suppression on USB 2.0 data lines (D+/D−) in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp minimizing signal distortion while meeting IEC 61000-4-2 ±15 kV contact discharge. Use Value: Limits transient overshoot to <125 V within <1 ns response time, preventing USB transceiver latch-up without degrading 480 Mbps eye diagram. |
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 | Same SMB package, 90 V VWM, 124 V VC at 4.8 A, but not AEC-Q101 qualified; lower thermal resistance (RθJA = 85 °C/W). | Limited to commercial/industrial use; unsuitable for automotive OEM designs requiring AEC-Q101 validation. | Select when cost-sensitive non-automotive designs require identical clamping performance without qualification overhead. |
| 1.5KE91CA | Through-hole DO-201 package, same 91 V nominal rating, 125 V VC, but 1500 W PPPM; larger footprint and manual assembly required. | Used where higher surge margin is needed and board space allows axial/DO-201 placement; incompatible with SMT-only production. | Choose only if legacy through-hole design mandates mechanical compatibility or >600 W surge headroom is mandatory. |
Compared with SMAJ90CA and 1.5KE91CA, P6SMB91CAHM3_A/H uniquely combines AEC-Q101 qualification, SMB surface-mount compatibility, and precise 77.8 V stand-off voltage - making it the preferred choice for new automotive electronics and high-reliability industrial SMT platforms where qualification, size, and parametric accuracy are jointly critical.
Availability
P6SMB91CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog inputs, telecom line card surge immunity, and consumer USB port ESD requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P6SMB91CAHM3_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 and application-specific performance.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom systems, delivering standardized SMB-packaged TVS devices with AEC-Q101 options and tight parametric control for mission-critical signal and power line protection.
FAQ
What does the "CA" suffix indicate in P6SMB91CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning P6SMB91CAHM3_A/H provides symmetrical clamping for both positive and negative voltage transients without requiring polarity-aware PCB layout. This eliminates the need for separate unidirectional devices on AC-coupled or floating lines, simplifying design and reducing BOM count while maintaining full 600 W surge capability in either direction.
Is P6SMB91CAHM3_A/H suitable for automotive applications?
Yes, P6SMB91CAHM3_A/H is AEC-Q101 qualified (confirmed by the "HM3" suffix), halogen-free, and RoHS-compliant - meeting stringent automotive reliability requirements for under-hood and cabin electronics. Its -65 °C to +150 °C operating range, MSL Level 1 rating, and validated surge performance make it appropriate for engine control units, ADAS camera modules, and body control modules.
What is the maximum clamping voltage of P6SMB91CAHM3_A/H and how is it measured?
The maximum clamping voltage of P6SMB91CAHM3_A/H is 125 V, measured at 4.8 A peak pulse current using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events, ensuring downstream ICs rated for ≤130 V absolute maximum survive repeated transients without degradation.
How does the SMB (DO-214AA) package of P6SMB91CAHM3_A/H compare to SMA or SMC packages?
The SMB package of P6SMB91CAHM3_A/H offers a 3.94 mm × 2.20 mm footprint - smaller than SMC (DO-214AB) but larger than SMA (DO-214AC), striking a balance between surge robustness and board space efficiency. Its 0.2" × 0.2" copper pad requirement ensures adequate thermal dissipation for 600 W pulses, while remaining compatible with standard pick-and-place equipment and reflow profiles.
Can P6SMB91CAHM3_A/H be used in place of a unidirectional TVS like P6SMB91AHM3_A/H?
No - P6SMB91CAHM3_A/H is strictly bidirectional and lacks cathode marking, whereas P6SMB91AHM3_A/H is unidirectional with defined polarity. Substituting them requires verifying circuit topology: bidirectional use cases (e.g., differential buses, AC signals) require P6SMB91CAHM3_A/H, while DC power rails needing forward conduction must use the unidirectional variant to avoid unintended conduction paths.
P6SMB91CAHM3_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):
- 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_A/H FAQ
1.How can I place an order for P6SMB91CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHM3_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 P6SMB91CAHM3_A/H reliable?
The price and inventory of P6SMB91CAHM3_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 P6SMB91CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHM3_A/H?
P6SMB91CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHM3_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 P6SMB91CAHM3_A/H?
For technical support, including P6SMB91CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB91CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHM3_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 P6SMB91CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHM3_A/H?
All P6SMB91CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHM3_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 P6SMB91CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB91CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHM3_A/H Tags
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