My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA9.1A
- Part No.:
- P4SMA9.1A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,597
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA9.1A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 7.78 V working stand-off voltage, 8.65–9.55 V breakdown voltage at 1.0 mA test current, 13.4 V maximum clamping voltage at 31.0 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the P4SMA9.1A datasheet, P4SMA9.1A pinout, P4SMA9.1A application, or P4SMA9.1A equivalent, key selection criteria include clamping performance under IEC 61000-4-5 surge conditions, low leakage (<50 µA at VWM), compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and suitability for space-constrained SMPS and DC/DC converter inputs.
Technical Context
The P4SMA9.1A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1.0 ps) and stable breakdown characteristics. Its thermal design supports continuous operation from –55 °C to +150 °C junction temperature, with derating above 25 °C ambient per published curve.
It delivers precise overvoltage clamping during transient events such as load dump or ESD, with a temperature coefficient of VBR at 0.068 %/°C and meets JESD201 Class 2 whisker resistance. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits <3.5 V forward voltage at 25 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.78 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected rail voltage. |
| VBR min/max | 8.65–9.55 V @ 1.0 mA - Confirmed breakdown range ensures reliable triggering across production lot and temperature. |
| VC@IPPM | 13.4 V @ 31.0 A - Clamping voltage during 10/1000 µs surge; determines worst-case stress on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling capacity per standard waveform; defines surge energy absorption capability. |
| IR@VWM | <50 µA - Low reverse leakage preserves efficiency in battery-powered or high-impedance circuits. |
| TJ max | +150 °C - Enables use in thermally demanding environments like automotive under-hood or industrial power supplies. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line (e.g., DC input rail) | Connected to source of transient energy; carries full surge current during clamping. |
| Cathode | Ground reference / return path | Connected to system ground or low-impedance return; establishes clamping reference and polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift under thermal cycling and humidity exposure. |
| Fast response time <1.0 ps | Enables effective suppression of nanosecond-scale ESD transients before sensitive circuitry is damaged. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validates robustness against automotive-level conducted transients including load dump and alternator switching noise. |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates need for dry-pack or baking prior to reflow, simplifying SMT assembly and reducing manufacturing cost. |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input stage protection against line surges and coupling transients in AC/DC adapters and offline SMPS. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and ground to clamp positive-going transients. Use Value: Limits voltage seen by primary-side controller ICs (e.g., PWM controllers) to ≤13.4 V, preventing latch-up or gate oxide damage. | Use Scenario: Protection of point-of-load (POL) converters in telecom or server boards exposed to board-level ESD and hot-swap events. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at DC input to buck regulator IC to absorb 10/1000 µs surges up to 31 A. Use Value: Maintains VWM = 7.78 V compatibility with 5 V or 8 V input rails while delivering sub-14 V clamping under full-rated surge. |
| Lighting Application | Adapters |
Use Scenario: Overvoltage protection in LED driver modules subjected to lightning-induced surges on AC mains or DC bus lines. IC Role / Device Role / Timing Role: Primary-line TVS on constant-current driver input to prevent catastrophic failure during outdoor installation surges. Use Value: Withstands 400 W peak pulse power and operates reliably from –55 °C to +150 °C, supporting outdoor-rated luminaires. | Use Scenario: Secondary-side protection in wall-mounted AC/DC adapters where compact size and low leakage are critical. IC Role / Device Role / Timing Role: Unidirectional TVS on regulated 5 V/9 V/12 V output to suppress coupling from primary side or connector ESD. Use Value: Delivers <50 µA leakage at 7.78 V, minimizing standby power loss while maintaining UL 94V-0 flammability compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | DO-214AA (SMB) package; 9.0 V nominal VBR; 600 W PPPM; higher IPPM (43.3 A) | Larger footprint; better suited for higher-energy surges but less space-efficient than P4SMA9.1A | Select SMBJ9.0A when surge energy exceeds 400 W or PCB layout allows larger SMA variant. |
| 1.5SMC9.0A | DO-214AB (SMC) package; 9.0 V nominal VBR; 1500 W PPPM; 123 A IPPM | Substantially larger package and higher clamping voltage (14.4 V); intended for industrial-grade surge immunity | Choose 1.5SMC9.0A only for systems requiring IEC 61000-4-5 Level 4 immunity or repeated high-energy transients. |
Compared with SMBJ9.0A and 1.5SMC9.0A, the P4SMA9.1A offers optimal balance of compact DO-214AC footprint, precise 7.78 V standoff, and 13.4 V clamping-making it ideal for consumer and industrial DC power inputs where board space and low clamping overshoot are prioritized.
Availability
P4SMA9.1A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, RoHS-compliant packaging, and consistent surge performance across production lots.
Supply support for P4SMA9.1A 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q200-qualified product lines.
The P4SMA9.1A belongs to TSC's P4SMA series of surface-mount TVS diodes engineered for high-reliability DC power rail protection in automotive, industrial, and consumer power electronics.
FAQ
What is the maximum clamping voltage of the P4SMA9.1A under standard surge conditions?
The P4SMA9.1A has a maximum clamping voltage (VC) of 13.4 V at 31.0 A peak pulse current using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the worst-case voltage imposed on protected circuitry during a defined transient event, ensuring downstream components remain within safe operating limits.
Is the P4SMA9.1A suitable for bidirectional transient protection?
No, the P4SMA9.1A is a unidirectional TVS diode and is not rated for bidirectional operation. For bidirectional protection, Taiwan Semiconductor specifies parts with "C" or "CA" suffixes (e.g., P4SMA9.1CA). Using P4SMA9.1A in reverse-biased AC applications may result in premature failure due to lack of reverse breakdown specification.
What is the working stand-off voltage (VWM) of the P4SMA9.1A, and why does it matter?
The P4SMA9.1A has a working stand-off voltage (VWM) of 7.78 V, meaning it remains in high-impedance state below this voltage and draws <50 µA leakage. This parameter ensures compatibility with 5 V or 8 V DC rails while avoiding false triggering during normal operation-critical for low-power and battery-backed systems.
Does the P4SMA9.1A meet automotive transient immunity standards?
Yes, the P4SMA9.1A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for 12 V automotive subsystems such as body control modules and infotainment power inputs. Its glass-passivated junction and –55 °C to +150 °C operating range further support under-hood and cabin deployment.
What is the package type and mounting compatibility of the P4SMA9.1A?
The P4SMA9.1A uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. It is compatible with standard reflow profiles, requires no pre-baking (MSL Level 1), and fits automated pick-and-place equipment-enabling high-yield, cost-effective manufacturing of P4SMA9.1A-equipped PCBs.
P4SMA9.1A 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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
P4SMA9.1A FAQ
1.How can I place an order for P4SMA9.1A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1A 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 P4SMA9.1A reliable?
The price and inventory of P4SMA9.1A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1A is usually 5 days.
3.What payment methods are accepted for P4SMA9.1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1A?
P4SMA9.1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1A 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 P4SMA9.1A?
For technical support, including P4SMA9.1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1A requirements.
6.How does Aetrix verify that P4SMA9.1A is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1A 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 P4SMA9.1A meets industry standards.
7.What is the process for return or replacement of P4SMA9.1A?
All P4SMA9.1A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1A, 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 P4SMA9.1A part is unused and in its original packaging.
Return procedure for P4SMA9.1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
