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Taiwan Semiconductor Corporation P4SMA91AH
- Part No.:
- P4SMA91AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91AH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,059
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Product details
Overview
P4SMA91AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 91 V breakdown voltage range (86.5–95.5 V), 77.8 V working stand-off voltage, 125 V maximum clamping voltage at 3.3 A peak impulse current, 400 W peak pulse power rating, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the P4SMA91AH datasheet, P4SMA91AH pinout, P4SMA91AH application, or P4SMA91AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, low leakage (<1 µA at 77.8 V), DO-214AC (SMA) package compatibility with automated assembly, and junction temperature operation from –55 °C to +150 °C.
Technical Context
The P4SMA91AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown and fast response (<1.0 ps). Its clamping behavior follows the 10/1000 µs double-exponential surge waveform per IEC 61000-4-5 and ANSI/IEEE C62.35, with thermal derating above 25 °C per Fig.2.
It supports bidirectional use only when paired with complementary devices or specified variants (e.g., P4SMA91CH); the "H" suffix denotes unidirectional configuration with cathode band marking. Moisture sensitivity level is J-STD-020 Level 1, and terminals are matte tin-plated per J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 86.5 V / 95.5 V - Ensures reliable avalanche conduction onset within defined tolerance at 1.0 mA test current |
| VWM | 77.8 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC@IPPM | 125 V at 3.3 A - Clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - Peak pulse power handling capability under standardized surge conditions |
| IR@VWM | <1 µA - Ultra-low reverse leakage preserves system efficiency in high-impedance bias networks |
| TJ range | –55 °C to +150 °C - Enables deployment in under-hood automotive, industrial, and outdoor power electronics |
| Package | DO-214AC (SMA) - Surface-mount footprint compatible with standard reflow profiles and pick-and-place equipment |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band on one end. Weight ≈ 0.060 g. Meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge or ESD events |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to higher-potential rail; avalanches into low-impedance state during overvoltage transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress-test requirements |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| Clamping response <1.0 ps | Protects sensitive ICs (e.g., CAN transceivers, microcontrollers) before transient energy couples into circuitry |
| ISO 7637-2 compliance | Withstands automotive load-dump and inductive-switching transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing and end-of-life processing |
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-induced voltage spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input/output rails to clamp overshoot and ringback during hard switching transitions. Use Value: Limits peak voltage to ≤125 V during 400 W surges, preventing gate oxide rupture and rectifier avalanche failure. | Use Scenario: Safeguarding 12 V to 5 V/3.3 V buck converter inputs in vehicle infotainment and ADAS modules exposed to battery line transients. IC Role / Device Role / Timing Role: Front-end transient suppressor absorbing ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (alternator decoupling). Use Value: Maintains system uptime by clamping 100 V transients to 125 V within 1.0 ps, preserving regulator IC integrity. |
| LED Driver Power Input | Industrial Sensor Signal Line |
Use Scenario: Overvoltage protection for constant-current LED driver ICs powered from 24 V industrial supplies subject to field wiring faults. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VIN and GND to absorb accidental 48 V misconnection or lightning-induced surges. Use Value: Withstands 400 W pulses while holding clamped voltage below 125 V, avoiding driver IC latch-up or thermal shutdown. | Use Scenario: Protecting analog sensor interface circuits (e.g., 4–20 mA loop receivers) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional TVS placed at connector entry point to shunt transients before signal conditioning amplifiers. Use Value: Prevents amplifier saturation and data corruption by clamping ±8 kV contact ESD to <125 V with sub-nanosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Same DO-214AA package; 90 V VWM, 125 V VC @ 3.2 A; 600 W PPPM | Higher power rating but larger footprint; not AEC-Q101 qualified | Select SMBJ90A only if higher surge margin is required and automotive qualification is not mandatory |
| 1.5SMC91A | DO-214AB (SMC) package; 91 V VWM, 139 V VC @ 2.9 A; 1500 W PPPM | Larger thermal mass and higher clamping voltage; suited for high-energy industrial surges | Choose 1.5SMC91A where PCB space allows and >400 W surge immunity is critical |
Compared with SMBJ90A and 1.5SMC91A, the P4SMA91AH offers AEC-Q101 qualification and tighter clamping (125 V) in the compact DO-214AC (SMA) footprint-ideal for space-constrained automotive and portable power designs requiring certified reliability.
Availability
P4SMA91AH is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and industrial LED drivers requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA91AH 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 with global distribution and AEC-Q101 validation capabilities.
The P4SMA91AH belongs to TSC's P4SMA(A)H series of surface-mount TVS diodes engineered for robust transient immunity in automotive, industrial, and consumer power systems where reliability under harsh electrical environments is essential.
FAQ
What is the breakdown voltage range of the P4SMA91AH?
The P4SMA91AH has a guaranteed breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current (VBR), measured per ANSI/IEEE C62.35 with 300 µs square-wave pulse. This tight tolerance ensures consistent clamping onset across production lots and operating temperatures up to +150 °C.
Is the P4SMA91AH suitable for automotive applications?
Yes, the P4SMA91AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction, –55 °C to +150 °C operating range, and J-STD-020 Level 1 moisture sensitivity make it appropriate for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of the P4SMA91AH during a surge event?
The P4SMA91AH exhibits a maximum clamping voltage (VC) of 125 V at 3.3 A peak impulse current under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient suppression.
Does the P4SMA91AH have bidirectional capability?
No, the P4SMA91AH is a unidirectional TVS diode, indicated by the "H" suffix and cathode band marking. For bidirectional protection, TSC specifies variants with "CH" or "CAH" suffixes (e.g., P4SMA91CH); the P4SMA91AH must be oriented with cathode toward the higher-potential rail.
What packaging and reel quantity is offered for the P4SMA91AH?
The P4SMA91AH is supplied in DO-214AC (SMA) package format on 7,500-unit tape-and-reel carriers, optimized for high-speed automated placement. The matte tin-plated leads comply with J-STD-002 solderability standards, and the compound meets UL 94V-0 flammability rating.
P4SMA91AH 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:
- 1
- Bidirectional Channels:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91AH FAQ
1.How can I place an order for P4SMA91AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91AH 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 P4SMA91AH reliable?
The price and inventory of P4SMA91AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91AH is usually 5 days.
3.What payment methods are accepted for P4SMA91AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91AH?
P4SMA91AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91AH 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 P4SMA91AH?
For technical support, including P4SMA91AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91AH requirements.
6.How does Aetrix verify that P4SMA91AH is sourced from the original manufacturer or authorized distributors?
All P4SMA91AH 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 P4SMA91AH meets industry standards.
7.What is the process for return or replacement of P4SMA91AH?
All P4SMA91AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91AH, 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 P4SMA91AH part is unused and in its original packaging.
Return procedure for P4SMA91AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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