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Taiwan Semiconductor Corporation P6SMB91CAH
- Part No.:
- P6SMB91CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,344
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Product details
Overview
P6SMB91CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage range 86.5–95.5 V, clamping voltage 125 V at 5.0 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the P6SMB91CAH datasheet, P6SMB91CAH pinout, P6SMB91CAH application, or P6SMB91CAH equivalent, this device is selected for high-reliability ESD and surge protection in automotive power nets, lighting modules, and industrial control I/O interfaces where low-leakage (<1 µA @ 77.8 V), fast response (<1.0 ps), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required.
Technical Context
The P6SMB91CAH is a bipolar TVS diode designed for symmetrical transient suppression in both forward and reverse directions, enabling robust protection without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across temperature.
It operates within -55°C to +150°C junction temperature range, features 10°C/W junction-to-case thermal resistance, and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - supporting reflow-compatible automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V - guaranteed breakdown activation window under 1.0 mA test current; defines minimum overvoltage threshold before clamping begins |
| VWM | 77.8 V - maximum continuous reverse operating voltage; circuit must stay below this to avoid leakage-induced power loss or false triggering |
| VC @ IPPM | 125 V @ 5.0 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream ICs during transient events |
| IPPM | 5.0 A - peak pulse current capability at rated clamping voltage; correlates directly with 600 W peak power rating (PPPSM) |
| IR @ VWM | <1 µA - ultra-low reverse leakage at stand-off voltage; critical for battery-powered or high-impedance sensing nodes |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and enclosed industrial enclosures |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 0.090 g mass; compatible with standard SMT pick-and-place and reflow profiles |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; P6SMB91CAH is bidirectional - no polarity marking required per datasheet note "Electrical characteristics apply in both directions".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Both terminals function identically as symmetrical clamping nodes; no DC bias polarity constraint - simplifies PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS subsystems |
| Clamping response time | <1.0 ps - enables suppression of nanosecond-scale ESD events before sensitive gate oxides or analog front-ends are damaged |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance stabilization network) - covers full automotive supply-line immunity requirements |
| Moisture sensitivity level | Level 1 per J-STD-020 - allows indefinite floor life before reflow; no baking required prior to assembly |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling mandates |
Applications
| Automotive Lighting Modules | Industrial PLC Digital I/O |
|---|---|
Use Scenario: LED headlamp drivers exposed to load-dump surges and ESD during service disconnect/reconnect. IC Role / Device Role / Timing Role: Primary transient clamp at 12 V/24 V rail input, placed upstream of DC-DC converters and LED controllers. Use Value: Limits voltage to ≤125 V during 600 W pulses, preventing latch-up or gate oxide rupture in MOSFET drivers and microcontrollers. |
Use Scenario: 24 V digital input cards receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Input-stage surge suppressor on each channel, protecting optocoupler inputs and level-shifting logic. Use Value: Withstands repetitive ISO 7637-2 Pulse 2b transients while maintaining <1 µA leakage at 77.8 V - avoids false triggering in high-impedance sensing circuits. |
| Automotive Body Control Units (BCUs) | Smart Building HVAC Controllers |
Use Scenario: Power distribution networks inside door modules handling window lift, mirror fold, and lock actuation. IC Role / Device Role / Timing Role: Bidirectional rail protector on switched 12 V lines, absorbing inductive kickback from relay and motor coils. Use Value: Symmetrical clamping (VBR = 86.5–95.5 V both ways) eliminates need for dual-diode configurations - reduces BOM count and board space. |
Use Scenario: 24 V DC-powered HVAC controllers interfacing with thermostats, dampers, and CO₂ sensors over long wiring runs. IC Role / Device Role / Timing Role: Secondary-level protection at terminal blocks and signal entry points, complementing primary MOV-based AC line protection. Use Value: 150 °C max junction temperature and J-STD-020 Level 1 rating ensure uninterrupted operation in hot equipment cabinets without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Breakdown range 90–100 V; clamping voltage 139 V @ 4.3 A; same DO-214AA package but lower peak power (600 W vs. SMBJ series' 600 W - identical rating) | Higher VC increases stress on protected ICs; lower IPPM reduces margin against high-energy transients | Select when tighter VBR tolerance (±5.6%) is prioritized over lowest possible clamping voltage |
| 1.5SMC91CA | Same VBR (86.5–95.5 V) and VC (125 V), but larger DO-214AB (SMC) package; higher thermal mass but requires more PCB area | Improved thermal dissipation (RθJA ≈ 40°C/W vs. 55°C/W) suits high-duty-cycle surge environments | Prefer for industrial systems with frequent surge exposure where footprint is less constrained than in automotive modules |
Compared with P6SMB91CAH, SMBJ90CA offers tighter breakdown tolerance but higher clamping voltage, while 1.5SMC91CA delivers identical electrical performance in a thermally superior but larger package - choice depends on layout density constraints and thermal duty cycle.
Availability
P6SMB91CAH is available at Aetrix Electronics and suitable for automotive lighting modules, industrial PLC digital I/O, and HVAC controller designs requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 immunity validation.
Supply support for P6SMB91CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The P6SMB91CAH belongs to TSC's AEC-Q101-qualified P6SMBx(A)H family - engineered specifically for automotive and industrial transient suppression where reliability, low leakage, and fast clamping are non-negotiable.
FAQ
What is the breakdown voltage range of the P6SMB91CAH?
The P6SMB91CAH has a specified breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current (VBR min/max). This bidirectional range ensures consistent clamping behavior regardless of transient polarity and aligns with the "91" nominal voltage designation in the part number. The P6SMB91CAH is tested per ANSI/IEEE C62.35 standards and guarantees activation within this window under defined conditions.
Is the P6SMB91CAH suitable for automotive applications?
Yes, the P6SMB91CAH is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, supports junction temperatures up to +150°C, and carries J-STD-020 Moisture Sensitivity Level 1 - all essential for under-hood and body electronics. The P6SMB91CAH is routinely deployed in lighting modules, BCUs, and infotainment power rails.
What does the "CAH" suffix indicate in P6SMB91CAH?
The "CAH" suffix denotes a bidirectional configuration with enhanced breakdown voltage tolerance (±5% typical) and AEC-Q101 qualification. Unlike "H"-suffix unidirectional variants, the P6SMB91CAH provides symmetrical clamping in both polarities - eliminating the need for orientation-aware placement and enabling simplified protection of AC-coupled or floating signal paths. This is confirmed in the datasheet's "Devices for Bipolar Applications" section.
What is the maximum clamping voltage of the P6SMB91CAH during a surge event?
The P6SMB91CAH has a maximum clamping voltage (VC) of 125 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a 600 W transient event. The P6SMB91CAH maintains this clamping performance across its full operating temperature range (-55°C to +150°C).
Does the P6SMB91CAH require special PCB layout considerations?
No special layout is needed beyond standard SMB footprint adherence. The P6SMB91CAH uses the DO-214AA (SMB) package with recommended pad dimensions provided in the datasheet. Because it is bidirectional, polarity-independent placement is allowed - no cathode band alignment is required. Thermal relief and short, low-inductance traces to ground/power rails are advised to preserve sub-nanosecond response; the P6SMB91CAH benefits from minimal trace length to maximize surge energy diversion.
P6SMB91CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- 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):
- 5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB91CAH FAQ
1.How can I place an order for P6SMB91CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAH 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 P6SMB91CAH reliable?
The price and inventory of P6SMB91CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAH is usually 5 days.
3.What payment methods are accepted for P6SMB91CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAH?
P6SMB91CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAH 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 P6SMB91CAH?
For technical support, including P6SMB91CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAH requirements.
6.How does Aetrix verify that P6SMB91CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAH 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 P6SMB91CAH meets industry standards.
7.What is the process for return or replacement of P6SMB91CAH?
All P6SMB91CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAH, 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 P6SMB91CAH part is unused and in its original packaging.
Return procedure for P6SMB91CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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