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Taiwan Semiconductor Corporation P4SMA27CH
- Part No.:
- P4SMA27CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CH.pdf
- Description:
- 400W, 27V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:9,533
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Product details
Overview
P4SMA27CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 27V breakdown voltage (24.3–29.7V), and clamping voltage of 39.1V at 10.7A. It protects DC/DC converters and automotive power supplies against ESD and ISO 7637-2 transients.
For engineers reviewing the P4SMA27CH datasheet, P4SMA27CH pinout, P4SMA27CH application, or P4SMA27CH equivalent, key selection criteria include its AEC-Q101 qualification, <1.0ps response time, 1μA max reverse leakage at 21.8V, bidirectional capability (CH suffix), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The P4SMA27CH uses a glass-passivated silicon junction to achieve fast transient suppression with low capacitance and stable clamping behavior. Its unidirectional configuration provides polarity-specific protection while maintaining low forward voltage (VF = 3.5V at 25A) and high surge current tolerance (IFSM = 40A).
Designed for automotive-grade reliability, it operates across –55°C to +150°C junction temperature, meets JESD201 Class 2 whisker resistance, and is RoHS- and halogen-free compliant per IEC 61249-2-21. Moisture sensitivity level is rated at Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 24.3V / 29.7V at 1mA test current - defines reliable conduction onset under transient stress |
| VWM | 21.8V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC@IPPM | 39.1V at 10.7A (10/1000μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400W - peak pulse power handling capacity per single non-repetitive event |
| IR@VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ range | –55°C to +150°C - supports under-hood and industrial ambient conditions without derating |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-die unidirectional TVS diode with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.060g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected line; conducts during positive surges when cathode is biased higher |
| Cathode | Reverse-biased clamping terminal | Marked with band; connects to higher-potential rail; initiates avalanche clamping when transient exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| Clamping ratio (VC/VBR) | ~1.61 - tight ratio ensures predictable overvoltage limiting without excessive margin overhead |
| Response time | <1.0ps - enables suppression of nanosecond-scale ESD events before downstream IC damage occurs |
| ISO 7637-2 compliance | Covers Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protecting 24V supply lines in body control modules from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp transients above 21.8V. Use Value: Withstands 400W pulses and maintains <1μA leakage at 21.8V, preserving low-power sleep mode integrity. | Use Scenario: Safeguarding input stage of isolated 48V-to-12V DC/DC converters in factory automation equipment. IC Role / Device Role / Timing Role: Primary overvoltage clamp on primary-side bus, triggered within <1ps of transient onset. Use Value: 39.1V clamping at 10.7A prevents MOSFET gate oxide breakdown and controller latch-up during surge events. |
| LED Driver Power Inputs | Telecom Power Interfaces |
Use Scenario: Input protection for constant-current LED drivers in streetlight systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end TVS on AC/DC output rail, absorbing repetitive 10/1000μs transients. Use Value: 150°C max junction temperature and UL 94V-0 package enable operation in sealed, thermally constrained enclosures. | Use Scenario: Secondary-side transient suppression on 24V telecom power feeds connected to remote radio units. IC Role / Device Role / Timing Role: Bidirectional-capable (CH suffix) TVS used in unidirectional configuration to protect PoE-powered interfaces. Use Value: AEC-Q101 qualification and JESD201 Class 2 whisker resistance ensure long-term reliability in vibration-prone outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | 600W rating, DO-214AA (SMB) package, 27V standoff, 43.5V clamping at 13.8A | Higher power handling but larger footprint; not AEC-Q101 qualified | Select SMBJ27A only if system-level surge testing exceeds 400W and PCB layout allows SMB size. |
| 1.5KE27CA | Through-hole TO-218 package, 1500W rating, bidirectional, 27V standoff, 43.5V clamping | Not surface-mount; incompatible with automated assembly; lacks AEC-Q101 and ISO 7637-2 validation | Choose 1.5KE27CA only for legacy through-hole designs where rework is acceptable and automotive qualification is not required. |
Compared with SMBJ27A and 1.5KE27CA, the P4SMA27CH offers optimal balance of AEC-Q101 compliance, SMT manufacturability, ISO 7637-2 coverage, and compact DO-214AC footprint-making it the preferred choice for new automotive and industrial board designs requiring validated transient immunity.
Availability
P4SMA27CH is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and LED driver protection requiring stable component supply and full traceability.
Supply support for P4SMA27CH 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, serving global automotive, industrial, and consumer markets since 1979.
The P4SMA27CH belongs to TSC's AEC-Q101-qualified P4SMAxH series of surface-mount TVS diodes, engineered specifically for robust transient immunity in harsh automotive and industrial power environments.
FAQ
What does the "CH" suffix indicate in P4SMA27CH?
The "CH" suffix in P4SMA27CH denotes a unidirectional TVS diode with cathode-band marking and AEC-Q101 qualification. Unlike "CAH" variants, the CH version is optimized for single-polarity clamping-ideal for protecting positive-rail inputs in automotive ECUs. The P4SMA27CH maintains all electrical specs of the base P4SMA27H family while adding automotive-grade reliability validation.
Is P4SMA27CH suitable for bidirectional transient protection?
No-P4SMA27CH is strictly unidirectional. For bidirectional protection, TSC specifies separate part numbers ending in "CAH" (e.g., P4SMA27CAH). While both share the same VBR, VWM, and clamping performance, the CAH variant integrates back-to-back diodes. Using P4SMA27CH in bidirectional roles risks failure during negative transients; always verify polarity alignment in schematic and layout for P4SMA27CH.
What is the maximum clamping voltage of P4SMA27CH under standard test conditions?
The maximum clamping voltage of P4SMA27CH is 39.1V at 10.7A peak pulse current using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage imposed on protected circuitry during a standardized surge event. Designers must ensure downstream components tolerate ≥39.1V for ≤1ms to guarantee functional safety with P4SMA27CH.
Does P4SMA27CH require derating at elevated ambient temperatures?
Yes-P4SMA27CH must be derated above 25°C ambient per Figure 2 in the datasheet. At 85°C, its 400W peak pulse power drops to ~240W (60% of rated value); at 125°C, it falls to ~120W (30%). Thermal design must account for PCB copper area, airflow, and adjacent heat sources to avoid exceeding 150°C junction temperature. P4SMA27CH's thermal resistance (RθJA) is not specified, so empirical thermal validation is recommended.
How does P4SMA27CH compare to P4SMA27AH in terms of breakdown voltage tolerance?
P4SMA27CH has a VBR range of 24.3V to 29.7V (±10%), while P4SMA27AH tightens this to 25.7V–28.4V (±5%). The "A" grade offers tighter binning for applications demanding precise clamping onset-such as regulated 24V systems where overvoltage margin is constrained. Both share identical package, power rating, and AEC-Q101 status; choose P4SMA27CH for cost-sensitive automotive designs where ±10% is acceptable, and P4SMA27AH where precision matters.
P4SMA27CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
P4SMA27CH FAQ
1.How can I place an order for P4SMA27CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CH 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 P4SMA27CH reliable?
The price and inventory of P4SMA27CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27CH is usually 5 days.
3.What payment methods are accepted for P4SMA27CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CH?
P4SMA27CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CH 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 P4SMA27CH?
For technical support, including P4SMA27CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CH requirements.
6.How does Aetrix verify that P4SMA27CH is sourced from the original manufacturer or authorized distributors?
All P4SMA27CH 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 P4SMA27CH meets industry standards.
7.What is the process for return or replacement of P4SMA27CH?
All P4SMA27CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CH, 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 P4SMA27CH part is unused and in its original packaging.
Return procedure for P4SMA27CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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