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Taiwan Semiconductor Corporation P4SMA27AH
- Part No.:
- P4SMA27AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27AH.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,006
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Product details
Overview
P4SMA27AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 25.7–28.4V breakdown voltage (VBR), and 37.5V clamping voltage (VC) at 11.0A peak impulse current. It provides robust ESD and surge protection for DC/DC converters, automotive power supplies, and industrial adapters.
For engineers reviewing the P4SMA27AH datasheet, P4SMA27AH pinout, P4SMA27AH application, or P4SMA27AH equivalent, key selection criteria include its AEC-Q101 qualification, 1μA max reverse leakage at 23.1V working stand-off voltage, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and glass-passivated junction for stable clamping performance under repetitive transients.
Technical Context
The P4SMA27AH operates as a unidirectional avalanche diode with a single-die configuration optimized for fast transient suppression. Its sub-1ps response time ensures clamping before sensitive downstream circuitry is exposed to overvoltage events, while its 150°C maximum junction temperature supports operation in high-ambient environments such as engine control units and on-board chargers.
Designed for surface-mount automated assembly, it features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. The device meets RoHS and halogen-free requirements per IEC 61249-2-21, and its DO-214AC package delivers mechanical robustness with UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 25.7–28.4V - defines minimum and maximum guaranteed avalanche initiation voltage under standardized test conditions |
| VWM | 23.1V - maximum continuous reverse operating voltage before significant leakage begins; sets system-level DC rail margin |
| VC @ IPPM=11.0A | 37.5V - clamped voltage during 10/1000μs surge; determines protected circuit's overvoltage stress ceiling |
| IPPM | 11.0A - peak surge current capability at rated clamping voltage; correlates directly to 400W pulse power handling |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +150°C - enables reliable operation in under-hood automotive and industrial power conversion environments |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; 0.060g mass; UL 94V-0 molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected line; conducts during forward surge or bias conditions |
| Cathode (banded end) | Avalanche clamping node | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR |
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 | Ensures stable VBR tolerance and low leakage across lifetime and temperature extremes |
| ISO 7637-2 compliance | Withstands defined automotive load dump and switching transient waveforms without degradation |
| Fast response time <1ps | Clamps transients before propagation into IC inputs or MOSFET gates, preserving signal integrity |
Applications
| Automotive Power Supply Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp surges above 23.1V. Use Value: Limits voltage seen by downstream regulators and microcontrollers to ≤37.5V during 11A 10/1000μs pulses, preventing latch-up or damage. | Use Scenario: Safeguarding isolated DC/DC converter primary-side input against induced surges in factory automation systems. IC Role / Device Role / Timing Role: Standoff protector on 24–36V input bus, absorbing energy from relay coil flyback or cable coupling. Use Value: Maintains <1μA leakage at 23.1V to avoid loading precision feedback networks while delivering 400W transient immunity. |
| LED Driver Input Stage | Telecom Adapter Surge Protection |
Use Scenario: Front-end protection for constant-current LED drivers in streetlight applications exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge shunt on AC-DC rectified output, positioned before bulk capacitor and controller IC. Use Value: Clamps 10/1000μs transients to 37.5V, ensuring driver ICs operate within absolute maximum ratings despite ±1kV line-to-ground surges. | Use Scenario: Secondary-side transient suppression in wall-mounted telecom adapters subjected to conducted EFT and surge per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Unidirectional TVS across 24V output rail to ground, guarding PoE-powered devices and interface ICs. Use Value: Provides AEC-Q101-grade reliability and 150°C thermal margin for sealed adapter enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A | 600W rating, 28V VBR min/max tighter (26.6–29.4V), DO-214AA package (larger footprint) | Higher power handling suits 48V systems; larger package requires PCB layout change | Select SMBJ28A when >400W surge margin is required and board space allows DO-214AA |
| 1.5SMC27A | 1500W rating, same 27V nominal VBR, DO-214AB (SMC) package (3.5mm × 7.0mm vs SMA's 2.8mm × 4.6mm) | Used in higher-energy industrial mains interfaces; incompatible footprint and thermal mass | Choose 1.5SMC27A only for legacy designs requiring SMC footprint or >1kW pulse capability |
Compared with SMBJ28A and 1.5SMC27A, the P4SMA27AH offers optimal balance of 400W surge capacity, compact DO-214AC footprint, AEC-Q101 qualification, and ultra-low leakage-making it ideal for space-constrained automotive and industrial DC/DC front ends where precise 23.1V standoff and 37.5V clamping are critical.
Availability
P4SMA27AH is available at Aetrix Electronics and suitable for automotive power supply protection, industrial DC/DC converter input stages, and LED driver input circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA27AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management components.
The P4SMA27AH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series of surface-mount TVS diodes, engineered specifically for automotive and industrial surge protection where reliability, tight VBR tolerance, and low leakage are mandatory.
FAQ
What is the polarity configuration of the P4SMA27AH?
The P4SMA27AH is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AC package. It conducts in forward bias and clamps in reverse bias above its breakdown voltage. Unlike bidirectional variants (e.g., P4SMA27AH with CH/CAH suffix), the P4SMA27AH is not symmetrical and must be oriented correctly in-circuit to protect against negative-going transients only.
Does the P4SMA27AH meet automotive qualification standards?
Yes, the P4SMA27AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per the AEC-Q101 standard. This certification confirms its suitability for use in automotive electronic control units, body electronics, and powertrain subsystems where reliability under harsh environmental conditions is essential.
What is the maximum clamping voltage of the P4SMA27AH under surge conditions?
The P4SMA27AH has a maximum clamping voltage (VC) of 37.5V at 11.0A peak pulse current (IPPM) using the 10/1000μs waveform. This value is measured under standardized test conditions and represents the upper limit of voltage imposed on protected circuitry during a worst-case transient event, enabling accurate overvoltage margin analysis in system design.
How does the P4SMA27AH compare to the P4SMA27H variant?
The P4SMA27AH has tighter breakdown voltage tolerance (25.7–28.4V) versus P4SMA27H (24.3–29.7V), resulting in more predictable clamping behavior and improved system-level voltage margin control. Both share identical package, power rating, and thermal specifications, but the 'A' suffix denotes enhanced VBR binning for applications demanding tighter parametric consistency.
Is the P4SMA27AH compliant with environmental regulations?
Yes, the P4SMA27AH is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads satisfy J-STD-002 solderability requirements. These attributes support compliance with global environmental directives and ensure compatibility with lead-free reflow processes in modern SMT assembly lines.
P4SMA27AH 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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)
P4SMA27AH FAQ
1.How can I place an order for P4SMA27AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27AH 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 P4SMA27AH reliable?
The price and inventory of P4SMA27AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27AH is usually 5 days.
3.What payment methods are accepted for P4SMA27AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27AH?
P4SMA27AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27AH 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 P4SMA27AH?
For technical support, including P4SMA27AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27AH requirements.
6.How does Aetrix verify that P4SMA27AH is sourced from the original manufacturer or authorized distributors?
All P4SMA27AH 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 P4SMA27AH meets industry standards.
7.What is the process for return or replacement of P4SMA27AH?
All P4SMA27AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27AH, 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 P4SMA27AH part is unused and in its original packaging.
Return procedure for P4SMA27AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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