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Taiwan Semiconductor Corporation P4SMA91CA
- Part No.:
- P4SMA91CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CA.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
P4SMA91CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 91V breakdown voltage (min 81.9V, max 100V), and clamping voltage of 131V at 3.2A 10/1000μs surge. It protects DC/DC converters and lighting circuits against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA91CA datasheet, P4SMA91CA pinout, P4SMA91CA application, or P4SMA91CA equivalent, key selection criteria include bidirectional clamping capability, 131V VC@IPPM, <1μA IR at 73.7V VWM, -55°C to +150°C operating range, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA91CA implements a glass-passivated silicon junction optimized for fast transient response (<1.0ps) and low leakage (<1μA at VWM). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity constraints.
Designed per ANSI/IEEE C62.35, it delivers 400W peak pulse power under 10/1000μs waveform, with thermal derating above 25°C per Fig.2 and junction temperature limited to 150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 81.9–100 V: guaranteed breakdown threshold for reliable overvoltage triggering |
| VWM | 73.7 V: maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPPM=3.2A | 131 V: clamped voltage during 10/1000μs surge-defines protected circuit's max stress level |
| PPPM | 400 W: peak pulse power handling per single non-repetitive 10/1000μs event |
| IR @ VWM | <1 μA: minimal standby leakage ensures low power loss in always-on systems |
| TJ Range | -55°C to +150°C: supports operation in automotive under-hood and industrial ambient environments |
| Package | DO-214AC (SMA): industry-standard SMT outline enabling high-density PCB layout and reflow compatibility |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; dual-terminal construction with no internal polarity distinction for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Transient current path terminal | Marked end denotes cathode for unidirectional variants; for P4SMA91CA (CA suffix), terminals are functionally symmetric-either terminal accepts surge current in either direction |
| Opposite terminal | Transient current return path | Completes bidirectional clamping loop; no fixed anode/cathode assignment-enables placement flexibility on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, or floating nodes without polarity-sensitive routing |
| Glass passivated junction | Ensures stable VBR over time and temperature, with reduced parameter drift vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Validated for automotive load-dump and supply-line transient immunity (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0 ps enables suppression before sensitive downstream ICs experience overstress |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | Automotive Lighting Control |
|---|---|
Use Scenario: Input-stage surge protection on 24V rail feeding isolated flyback controller. IC Role / Device Role / Timing Role: TVS clamps ISO 7637-2 Pulse 2b (load dump) spikes to ≤131V, preventing damage to primary-side MOSFET gate driver and controller IC. Use Value: Enables robust 24V SMPS design meeting AEC-Q200 stress requirements without external crowbar circuitry. | Use Scenario: Overvoltage protection on CAN-connected LED headlamp driver module. IC Role / Device Role / Timing Role: Bidirectional clamping absorbs coupled transients from adjacent high-current loads (e.g., starter motor engagement) on shared vehicle battery rail. Use Value: Prevents false resets or latch-up in LED driver ICs while maintaining CAN bus integrity via low capacitance and fast response. |
| On-board DC/DC Converter | Industrial Sensor Interface |
Use Scenario: Input protection for 5V/3.3V point-of-load buck converter powering FPGA I/O banks. IC Role / Device Role / Timing Role: Limits input rail excursions during hot-swap or cable ESD events to safe levels below converter IC absolute maximum ratings. Use Value: Eliminates need for series ferrite + parallel capacitor filtering, reducing BOM count and board area by 30%. | Use Scenario: Protection of 4–20mA analog sensor transmitter output against field wiring faults. IC Role / Device Role / Timing Role: Clamps induced surges from lightning-induced ground potential rise or relay coil flyback without affecting 4–20mA loop accuracy. Use Value: Maintains <1μA leakage at 24V loop supply, preserving full 16-bit DAC resolution and calibration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA (Bourns) | Same DO-214AA package; 90V VBR min/max tighter (81–89V); 600W PPPM rating | Higher power handling suits repetitive surge environments; slightly lower VBR may trigger earlier in marginal conditions | Select SMBJ90CA when system-level testing shows >400W surge energy or tighter VBR tolerance is required |
| 1.5KE91CA (ON Semiconductor) | Through-hole DO-15 package; same 91V VBR range; 1500W PPPM but larger footprint and manual assembly | Not suitable for high-density SMT designs; better for prototyping or legacy through-hole boards | Choose 1.5KE91CA only if DO-214AC rework constraints or thermal mass limitations preclude P4SMA91CA use |
Compared with SMBJ90CA and 1.5KE91CA, the P4SMA91CA offers optimal balance of SMT manufacturability, 400W surge capacity, and precise 81.9–100V VBR window for cost-sensitive automotive and industrial DC/DC applications where DO-214AC footprint is mandated.
Availability
P4SMA91CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive lighting modules, and on-board DC/DC converters requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for P4SMA91CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The P4SMA91CA belongs to TSC's P4SMAx family of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient suppression in space-constrained, high-reliability DC power rails.
FAQ
What is the clamping voltage of the P4SMA91CA under standard 10/1000μs surge conditions?
The P4SMA91CA has a maximum clamping voltage (VC) of 131 V at 3.2 A peak impulse current (IPPM) using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA91CA maintains this clamping performance across its full operating temperature range (-55°C to +150°C) with minimal derating up to 125°C.
Is the P4SMA91CA suitable for bidirectional signal line protection?
Yes, the P4SMA91CA is explicitly designed for bidirectional operation, as indicated by the "CA" suffix per TSC documentation. Its symmetrical breakdown characteristics (VBR min/max identical in both directions) and absence of polarity-dependent marking make it ideal for protecting AC-coupled interfaces, differential buses like RS-485, or floating sensor outputs. Unlike unidirectional variants, the P4SMA91CA does not require orientation-specific PCB placement.
How does the P4SMA91CA meet automotive transient immunity standards?
The P4SMA91CA meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection/load dump), and Pulse 3a/3b (capacitive coupling) requirements. Its 400W peak pulse power rating, fast <1.0ps response, and 131V clamping voltage ensure protected ECUs remain within safe operating limits during real-world vehicle electrical disturbances. TSC validates these capabilities per test waveforms defined in the standard.
What is the maximum reverse leakage current specification for the P4SMA91CA at its working stand-off voltage?
The P4SMA91CA exhibits a maximum reverse leakage current (IR) of 1 μA when biased at its working stand-off voltage (VWM) of 73.7 V. This ultra-low leakage ensures minimal power loss in always-on systems such as automotive body control modules or industrial sensor transmitters, preserving battery life and avoiding measurement errors in precision analog circuits powered from the same rail.
Does the P4SMA91CA require special PCB layout considerations due to its DO-214AC package?
No special layout is required beyond standard DO-214AC (SMA) guidelines: use recommended pad dimensions from TSC's Package Outline Drawing, maintain ≥0.25 mm solder mask dams between pads, and avoid thermal reliefs on high-current paths. The P4SMA91CA's low thermal resistance (junction-to-lead) allows standard reflow profiles; its 0.060g weight and matte tin plating ensure reliable automated placement and solder joint integrity per J-STD-002.
P4SMA91CA 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- 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)
P4SMA91CA FAQ
1.How can I place an order for P4SMA91CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CA 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 P4SMA91CA reliable?
The price and inventory of P4SMA91CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91CA is usually 5 days.
3.What payment methods are accepted for P4SMA91CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CA?
P4SMA91CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CA 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 P4SMA91CA?
For technical support, including P4SMA91CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CA requirements.
6.How does Aetrix verify that P4SMA91CA is sourced from the original manufacturer or authorized distributors?
All P4SMA91CA 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 P4SMA91CA meets industry standards.
7.What is the process for return or replacement of P4SMA91CA?
All P4SMA91CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CA, 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 P4SMA91CA part is unused and in its original packaging.
Return procedure for P4SMA91CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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