My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA9.1
- Part No.:
- P4SMA9.1
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1.pdf
- Description:
- 400W, 9.1V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,717
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA9.1 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails. It features a 7.37 V working stand-off voltage, 8.19–10.00 V breakdown voltage at 1.0 mA test current, and clamps transients to 13.8 V at 30.0 A peak impulse current under 10/1000 μs waveform, with 400 W peak pulse power rating.
For engineers reviewing the P4SMA9.1 datasheet, P4SMA9.1 pinout, P4SMA9.1 application, or P4SMA9.1 equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, low 50 µA maximum reverse leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and suitability for compact, high-reliability DC/DC converter and adapter protection circuits.
Technical Context
The P4SMA9.1 operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior and fast response (<1.0 ps). Its clamping action begins at VBR min = 8.19 V and fully limits surge energy within 13.8 V at IPPM = 30.0 A, enabling robust protection of downstream 5 V or 3.3 V logic rails against ESD and load-dump events.
Designed for surface-mount automation, it uses a single-die DO-214AC (SMA) package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band, and operation is specified across –55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.37 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR @ IT=1.0 mA | 8.19–10.00 V - Breakdown voltage range where avalanche conduction reliably initiates |
| VC @ IPPM=30.0 A | 13.8 V - Clamped voltage during 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 400 W - Peak pulse power handling capability per single non-repetitive event |
| IR @ VWM | ≤50 µA - Low leakage ensures minimal standby power loss in battery-powered systems |
| TJ max | +150 °C - Enables use in thermally demanding environments like automotive under-hood modules |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration with cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected power rail (e.g., +12 V input); conducts forward during clamping |
| Cathode | Output/Load side | Connected to ground or return path; polarity mark indicates cathode end of diode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale ESD transients before sensitive circuitry is damaged |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load dump and inductive switching surge immunity |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or baking prior to reflow, simplifying SMT manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side input rectifier and controller ICs against line surges and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp transients before they reach PWM controller or MOSFET gate drivers. Use Value: Limits voltage excursion to 13.8 V during 30 A surge, preventing latch-up or oxide damage in 5 V–12 V control ICs. | Use Scenario: Input rail protection in point-of-load (POL) converters powering FPGAs or microprocessors. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing coupled noise from adjacent switching stages or hot-swap events. Use Value: 7.37 V VWM allows safe operation with 5 V or 3.3 V nominal inputs while maintaining margin against ripple-induced false triggering. |
| Adapter Power Input | Lighting Application (LED Driver) |
Use Scenario: Surge protection at AC/DC adapter output terminals exposed to mains-borne transients. IC Role / Device Role / Timing Role: Primary-side clamping element placed after bulk capacitor to protect secondary-side regulation circuitry. Use Value: 400 W peak power rating handles repetitive 1 kV/500 A surge tests per IEC 61000-4-5 Level 4 requirements. | Use Scenario: Overvoltage safeguard in constant-current LED driver inputs subjected to cable discharge or lightning-induced coupling. IC Role / Device Role / Timing Role: Unidirectional shunt device diverting surge current away from driver IC and current-sense resistors. Use Value: 50 µA max IR at VWM minimizes quiescent current impact on efficiency-critical LED lighting systems. |
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 (min/max 8.55–9.45 V); 600 W PPPM rating | Higher power handling but larger footprint; requires PCB layout change | Select when higher surge margin is needed and board space permits SMB package |
| 1.5SMC9.0A | DO-214AB (SMC) package; same VBR range; 1500 W PPPM; higher VF and IR | Designed for higher-energy industrial transients; not suitable for space-constrained adapters | Choose only for heavy-duty industrial equipment where 1500 W clamping is mandatory |
Compared with SMBJ9.0A and 1.5SMC9.0A, the P4SMA9.1 offers optimal balance of compact DO-214AC footprint, precise 7.37 V VWM for 5 V system compatibility, and certified ISO 7637-2 immunity-making it preferred for consumer and automotive body electronics where size and standard compliance are critical.
Availability
P4SMA9.1 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and adapter input protection requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for P4SMA9.1 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, automotive, and consumer markets.
The P4SMA9.1 belongs to TSC's P4SMAx series of surface-mount TVS diodes engineered specifically for high-volume, automated assembly of compact power conversion and interface protection circuits.
FAQ
What is the maximum clamping voltage of the P4SMA9.1 under standard surge conditions?
The P4SMA9.1 has a maximum clamping voltage (VC) of 13.8 V when subjected to a 10/1000 μs waveform peak impulse current of 30.0 A. This value is measured per JEDEC/IEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA9.1 maintains this clamping performance across its rated operating temperature range of –55 °C to +150 °C.
Is the P4SMA9.1 unidirectional or bidirectional, and how is polarity identified?
The P4SMA9.1 is a unidirectional TVS diode, intended for DC rail protection with defined anode-to-cathode orientation. Polarity is indicated by a cathode band printed on the DO-214AC (SMA) package body. This marking aligns with standard diode convention: the banded end connects to ground or the lower-potential node in the circuit. Bidirectional variants use "C" or "CA" suffixes (e.g., P4SMA9.1C), which the P4SMA9.1 does not carry.
Does the P4SMA9.1 meet automotive surge immunity standards?
Yes, the P4SMA9.1 meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms-standardized test profiles for automotive electrical system transients including load dump, alternator decoupling, and inductive switching. This certification is explicitly stated in the official Taiwan Semiconductor datasheet (Version S2102) and confirms suitability for body control modules, infotainment power supplies, and other 12 V automotive subsystems.
What is the reverse leakage current specification for the P4SMA9.1 at its working voltage?
The P4SMA9.1 specifies a maximum reverse leakage current (IR) of 50 µA when biased at its working stand-off voltage (VWM) of 7.37 V. This low leakage supports energy-efficient designs, especially in battery-powered or always-on applications where standby current must be minimized. The parameter is tested at TA = 25 °C and remains within acceptable limits across the full –55 °C to +150 °C operating junction temperature range.
Can the P4SMA9.1 be used in place of the P4SMA9.1A variant?
No-the P4SMA9.1 and P4SMA9.1A are distinct variants with different breakdown voltage tolerances. The P4SMA9.1 has a VBR range of 8.19–10.00 V (±11% typical), while the P4SMA9.1A tightens this to 8.65–9.55 V (±5%). Their VWM also differs (7.37 V vs. 7.78 V), affecting standoff margin. Substituting one for the other may cause premature conduction or insufficient protection. Always verify design margins using the exact P4SMA9.1 datasheet parameters.
P4SMA9.1 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):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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)
P4SMA9.1 FAQ
1.How can I place an order for P4SMA9.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1 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 P4SMA9.1 reliable?
The price and inventory of P4SMA9.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1 is usually 5 days.
3.What payment methods are accepted for P4SMA9.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1?
P4SMA9.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1 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 P4SMA9.1?
For technical support, including P4SMA9.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1 requirements.
6.How does Aetrix verify that P4SMA9.1 is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1 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 P4SMA9.1 meets industry standards.
7.What is the process for return or replacement of P4SMA9.1?
All P4SMA9.1 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1, 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 P4SMA9.1 part is unused and in its original packaging.
Return procedure for P4SMA9.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1 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 …
