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Taiwan Semiconductor Corporation P4SMA91C
- Part No.:
- P4SMA91C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91C.pdf
- Description:
- 400W, 91V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:2,354
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Product details
Overview
P4SMA91C from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal paths. It features a 91V breakdown voltage (min 81.9V, max 100V), 73.7V working stand-off voltage, 131V clamping voltage at 3.2A peak pulse current, and operates across –55°C to +150°C junction temperature range - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA91C datasheet, P4SMA91C pinout, P4SMA91C application, or P4SMA91C equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA at VWM), DO-214AC (SMA) package compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics robustness.
Technical Context
The P4SMA91C is a single-die, unidirectional TVS diode optimized for fast transient suppression in low-inductance PCB layouts. Its glass-passivated junction ensures stable breakdown characteristics, while sub-1ps response time enables effective clamping of ESD and load-dump events before downstream circuitry sustains damage.
It operates within a defined thermal envelope: derated linearly above 25°C ambient per Fig.2, with maximum junction temperature limited to 150°C and storage range matching operating range (–55°C to +150°C). The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for the molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 81.9V / 100V at 1.0mA test current - defines reliable conduction onset window under surge conditions |
| VWM | 73.7V - maximum continuous reverse voltage before significant leakage begins |
| VC@IPPM | 131V at 3.2A (10/1000μs) - peak clamped voltage seen by protected circuit during worst-case transient |
| IR@VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| PPPM | 400W - peak pulse power handling capability under standardized 10/1000μs waveform |
| TJ max | +150°C - enables operation in thermally demanding environments including under-hood automotive locations |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking and matte tin-plated leads |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two coplanar gull-wing leads; polarity indicated by cathode band; weight ≈ 0.060g; RoHS and halogen-free compliant; moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge current sink (in reverse-biased protection mode) | Connected to protected line; conducts transient energy to ground when VRM exceeded |
| Cathode | Reference terminal / Ground reference point | Typically tied to system ground plane; establishes polarity-sensitive clamping threshold |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and life cycles |
| Fast response time <1ps | Enables clamping before transient energy couples into sensitive IC inputs or power rails |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 2b) and coupled transient (Pulse 1/3a/3b) immunity testing |
| UL 94V-0 molding compound | Prevents flame propagation during fault conditions, supporting safety-critical power supply designs |
| J-STD-020 Level 1 moisture rating | Eliminates pre-bake requirement prior to reflow soldering - supports high-yield automated assembly |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier outputs against switching transients and input surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input bus or output rail to clamp voltage spikes exceeding 73.7V. Use Value: Prevents destructive overvoltage on silicon devices without adding series impedance or affecting steady-state regulation. | Use Scenario: Safeguarding 12V-to-5V/3.3V buck converter inputs in vehicle infotainment and ADAS modules exposed to battery line disturbances. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 2b (load dump) energy up to 400W peak. Use Value: Maintains functional safety by limiting rail voltage to ≤131V during 12V system transients, preserving downstream logic integrity. |
| LED Lighting Driver Input Stage | Industrial AC-DC Adapter Output Rail |
Use Scenario: Input protection for constant-current LED drivers subjected to lightning-induced surges on mains-connected lines. IC Role / Device Role / Timing Role: Primary-line TVS suppressing differential-mode transients before they reach bridge rectifier and bulk capacitor. Use Value: Extends driver lifetime by eliminating cumulative degradation from repeated sub-threshold overvoltage stress. | Use Scenario: Output overvoltage clamp in universal-input wall adapters powering IoT sensors and controllers. IC Role / Device Role / Timing Role: Secondary-side unidirectional TVS ensuring regulated 5V/12V outputs remain within ±5% tolerance during transient coupling. Use Value: Avoids brownout resets and latch-up in connected microcontrollers by holding output below 131V during fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A (Bourns) | 90V standoff, 143V clamping at 2.8A, SMB package (larger footprint than SMA) | Higher clamping voltage; requires PCB layout revision due to different pad dimensions | Select when higher surge margin is needed and board space allows SMB outline |
| 1.5SMC91C (ON Semiconductor) | Same 91V breakdown range, 131V clamping, but in larger SMC (DO-214AB) package | Identical electrical specs but 30% larger footprint and higher thermal mass | Choose only if existing design uses SMC footprint or requires enhanced thermal dissipation |
Compared with P4SMA91C, SMBJ90A offers slightly lower VWM but higher VC, increasing protected circuit stress; 1.5SMC91C matches clamping performance exactly but demands PCB redesign - P4SMA91C delivers optimal balance of compact DO-214AC size, precise 73.7V standoff, and 131V clamping for space-constrained 12–48V systems.
Availability
P4SMA91C is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and industrial LED lighting applications requiring stable component supply and full traceability.
Supply support for P4SMA91C 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, and power MOSFETs for industrial and automotive markets.
The P4SMA91C belongs to TSC's P4SMAx family of 400W surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant overvoltage protection in compact, high-reliability power conversion systems.
FAQ
What is the breakdown voltage range of the P4SMA91C?
The P4SMA91C has a specified breakdown voltage range of 81.9V to 100V at 1.0mA test current (VBR), measured per ANSI/IEEE C62.35 standards. This range ensures consistent turn-on behavior across production lots and temperature extremes, enabling reliable overvoltage detection in 72–96V nominal systems where the P4SMA91C serves as the primary transient clamp.
Is the P4SMA91C suitable for bidirectional transient protection?
No, the P4SMA91C is a unidirectional TVS diode intended for DC line protection with defined anode–cathode polarity. For bidirectional applications such as AC signal lines or data buses, the P4SMA91CA variant (with 'CA' suffix) must be used - it provides symmetrical clamping in both directions and is explicitly designated for bipolar use per TSC documentation.
What is the maximum clamping voltage of the P4SMA91C under standard surge conditions?
The P4SMA91C exhibits a maximum clamping voltage (VC) of 131V when subjected to a 10/1000μs surge waveform at its rated peak pulse current of 3.2A. This value is guaranteed across manufacturing lots and represents the highest voltage that will appear across the protected circuit during a standardized transient event, directly informing safe margin design for downstream components.
Does the P4SMA91C meet automotive-grade reliability standards?
Yes, the P4SMA91C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for automotive electronic modules and is qualified to operate from –55°C to +150°C junction temperature. Its DO-214AC package passes JESD201 Class 2 whisker testing and moisture sensitivity Level 1, supporting zero-defect reflow assembly in automotive production environments.
What packaging and reel quantity is offered for the P4SMA91C?
The P4SMA91C is supplied in DO-214AC (SMA) package format on 7,500-piece tape-and-reel carriers, compatible with standard SMT pick-and-place equipment. The reel conforms to EIA-481-D standards, and each unit is marked with the code "CUJ" per TSC's ordering specification - enabling full traceability and automated optical verification during assembly.
P4SMA91C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91C FAQ
1.How can I place an order for P4SMA91C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91C 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 P4SMA91C reliable?
The price and inventory of P4SMA91C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91C is usually 5 days.
3.What payment methods are accepted for P4SMA91C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91C?
P4SMA91C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91C 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 P4SMA91C?
For technical support, including P4SMA91C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91C requirements.
6.How does Aetrix verify that P4SMA91C is sourced from the original manufacturer or authorized distributors?
All P4SMA91C 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 P4SMA91C meets industry standards.
7.What is the process for return or replacement of P4SMA91C?
All P4SMA91C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91C, 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 P4SMA91C part is unused and in its original packaging.
Return procedure for P4SMA91C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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