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Taiwan Semiconductor Corporation P4SMA24AH
- Part No.:
- P4SMA24AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AH.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,212
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Product details
Overview
P4SMA24AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 22.8V–25.2V breakdown voltage (VBR), and 33.2V clamping voltage (VC) at 12.6A, used to protect DC/DC converters and automotive power rails against ISO 7637-2 pulses.
For engineers reviewing the P4SMA24AH datasheet, P4SMA24AH pinout, P4SMA24AH application, or P4SMA24AH equivalent, key selection criteria include its AEC-Q101 qualification, 1.0ps response time, <1μA leakage at 20.5V, DO-214AC mechanical compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics protection.
Technical Context
The P4SMA24AH employs a glass-passivated silicon junction optimized for fast transient suppression in automotive and industrial power systems. Its unidirectional configuration provides reverse-biased clamping only, with VWM = 20.5V and VBR tested at 1.0mA, ensuring reliable standoff below system operating voltage while triggering within 1.0ps of overvoltage onset.
It operates across –55°C to +150°C junction temperature range and supports automated SMT placement per J-STD-002 solderability standards. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for high-reliability board-level surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 22.8V min / 25.2V max - defines precise voltage threshold where clamping initiates under standardized test current |
| VWM | 20.5V - maximum continuous reverse working voltage; must exceed system nominal rail (e.g., 12V or 24V bus) to avoid leakage conduction |
| VC @ IPPM=12.6A | 33.2V - clamped voltage during 10/1000μs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 400W - peak pulse power handling per single non-repetitive event; derates linearly above 25°C ambient |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response Time | <1.0ps - enables effective suppression of ESD and fast-switching transients before sensitive circuitry is damaged |
| TJ Range | –55°C to +150°C - supports operation in under-hood automotive environments and industrial power supplies |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 24V rail); conducts only during overvoltage events to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation |
| Fast response <1.0ps | Minimizes voltage overshoot during nanosecond-scale transients such as relay bounce or MOSFET switching noise |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing and end-of-life processing |
Applications
| Automotive Power Rail Protection | On-board DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp surges up to ±100V. Use Value: Limits peak voltage to 33.2V during 12.6A 10/1000μs pulses, preventing damage to MCU power inputs and CAN transceivers. | Use Scenario: Safeguarding input stage of 24V-to-5V buck converter in ADAS camera modules. IC Role / Device Role / Timing Role: Primary surge suppression element upstream of input filter capacitor and controller IC. Use Value: Withstands repetitive 400W pulses without parameter shift, maintaining stable VWM = 20.5V standoff during normal operation. |
| Industrial SMPS Input Stage | LED Driver Power Input |
Use Scenario: Input protection for 24V industrial switch-mode power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense against differential-mode transients entering via AC/DC or DC/DC front-end. Use Value: Delivers 400W peak power rating with <1μA leakage at 20.5V, enabling low-power standby mode without thermal penalty. | Use Scenario: Overvoltage protection for constant-current LED drivers in street lighting systems. IC Role / Device Role / Timing Role: Clamps inductive kickback from driver MOSFETs and grid voltage spikes. Use Value: Fast 1.0ps response prevents LED string overcurrent during rapid transients, preserving luminous lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA (SMB) package; same VBR range (22.8–25.2V), but 600W PPPM and higher VC = 38.9V | Higher power handling but larger footprint; less suitable for space-constrained automotive PCBs | Select SMBJ24A only when >400W surge margin is required and board area allows DO-214AA layout |
| 1.5SMC24A | DO-214AB (SMC) package; 1500W PPPM, VC = 38.9V, VWM = 20.5V, but 1.5g weight and 7.1mm x 6.2mm footprint | Designed for high-energy industrial surges; incompatible with SMA-reflow profiles due to thermal mass | Choose 1.5SMC24A for heavy-duty industrial equipment where PCB real estate and thermal inertia permit larger packages |
Compared with SMBJ24A and 1.5SMC24A, the P4SMA24AH offers optimal balance of 400W surge capability, compact DO-214AC footprint, AEC-Q101 qualification, and sub-1μA leakage-making it preferred for automotive body control modules and space-limited DC/DC designs requiring certified reliability.
Availability
P4SMA24AH is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and LED lighting systems requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for P4SMA24AH 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 automotive, industrial, and consumer markets.
The P4SMA series was developed specifically for AEC-Q101-compliant board-level transient protection in automotive power distribution networks and industrial DC/DC converters, emphasizing fast response, low leakage, and robust thermal performance.
FAQ
What is the clamping voltage of P4SMA24AH under standard 10/1000μs surge conditions?
The P4SMA24AH has a maximum clamping voltage (VC) of 33.2V when subjected to a 10/1000μs waveform at its rated peak pulse current of 12.6A. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 33.2V during transient events, making P4SMA24AH suitable for protecting 24V-system ICs with 36V absolute maximum ratings.
Is P4SMA24AH qualified for automotive applications?
Yes, P4SMA24AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its glass-passivated junction, –55°C to +150°C operating range, and JESD201 Class 2 whisker resistance confirm suitability for under-hood and chassis-mounted automotive electronics where P4SMA24AH serves as primary surge suppression.
What is the working stand-off voltage (VWM) of P4SMA24AH, and why does it matter?
The working stand-off voltage (VWM) of P4SMA24AH is 20.5V - the maximum DC or continuous reverse voltage the device can withstand without significant leakage. This parameter ensures P4SMA24AH remains non-conductive during normal 24V system operation while still triggering reliably during overvoltage events, preventing false triggering and power loss in circuits where P4SMA24AH is deployed.
How does the response time of P4SMA24AH compare to typical TVS diodes?
P4SMA24AH features a typical response time of less than 1.0ps, significantly faster than most standard TVS diodes (typically 1–5ps). This ultrafast reaction enables P4SMA24AH to limit voltage overshoot before sensitive analog or digital circuitry responds, especially critical in high-speed automotive data lines and switching power supply feedback paths where P4SMA24AH is commonly applied.
What package type does P4SMA24AH use, and what are its mounting considerations?
P4SMA24AH uses the DO-214AC (SMA) surface-mount package with cathode band marking, matte tin-plated leads, and moisture sensitivity level 1. It supports automated placement and reflow soldering per J-STD-002; recommended pad layout follows TSC's suggested dimensions to ensure thermal dissipation and mechanical reliability when P4SMA24AH is mounted on FR-4 PCBs in high-vibration environments.
P4SMA24AH 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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)
P4SMA24AH FAQ
1.How can I place an order for P4SMA24AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AH 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 P4SMA24AH reliable?
The price and inventory of P4SMA24AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24AH is usually 5 days.
3.What payment methods are accepted for P4SMA24AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AH?
P4SMA24AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AH 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 P4SMA24AH?
For technical support, including P4SMA24AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AH requirements.
6.How does Aetrix verify that P4SMA24AH is sourced from the original manufacturer or authorized distributors?
All P4SMA24AH 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 P4SMA24AH meets industry standards.
7.What is the process for return or replacement of P4SMA24AH?
All P4SMA24AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AH, 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 P4SMA24AH part is unused and in its original packaging.
Return procedure for P4SMA24AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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