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Taiwan Semiconductor Corporation P4SMA27C
- Part No.:
- P4SMA27C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27C.pdf
- Description:
- 400W, 27V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,901
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Product details
Overview
P4SMA27C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 27 V nominal breakdown voltage (VBR = 24.3–29.7 V), 400 W peak pulse power rating (10/1000 µs), 21.8 V working stand-off voltage (VWM), clamps to ≤39.1 V at 10.7 A, and operates across –55 °C to +150 °C junction temperature - deployed in automotive DC/DC converters and industrial SMPS input stages.
For engineers reviewing the P4SMA27C datasheet, P4SMA27C pinout, P4SMA27C application, or P4SMA27C equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, bidirectional clamping symmetry, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ VWM), and fast sub-1 ps response time - critical for protecting sensitive controllers and interface ICs against ESD and load dump transients.
Technical Context
The P4SMA27C implements a single-die, bidirectional avalanche junction structure optimized for transient suppression in unidirectional and bidirectional signal/power paths. Its glass-passivated chip junction ensures stable VBR tolerance (±5% for 'A' variants, ±10% for standard), while the DO-214AC package supports automated placement and meets UL 94V-0 flammability requirements.
It delivers symmetrical clamping in both polarities with identical VBR, VC, and IPPM specifications - enabling use without polarity consideration in AC-coupled or floating bus applications. The device sustains 40 A non-repetitive forward surge current (IFSM) and maintains <3.5 V forward voltage at 25 A, supporting high-energy transient absorption without latch-up or thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 24.3–29.7 V - defines reliable avalanche initiation threshold under standardized test conditions |
| VWM | 21.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM = 10.7 A | ≤39.1 V - clamped voltage during 400 W transient, limiting downstream stress on protected ICs |
| IPPM (10/1000 µs) | 10.7 A - peak impulse current capability, directly determining surge energy handling (400 W) |
| IR @ VWM | <1 µA - ultra-low leakage preserves battery life and avoids false triggering in low-power systems |
| TJ Range | –55 °C to +150 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor power supplies |
| Package | DO-214AC (SMA) - industry-standard SMD outline with 2.54 mm lead pitch and JEDEC-compliant footprint |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal bidirectional configuration - no anode/cathode distinction required for operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input node (bidirectional) | Connects to line under protection; conducts avalanche current in either polarity during overvoltage |
| Terminal 2 | Transient return / reference node (bidirectional) | Connects to system ground or return rail; completes transient current path with symmetric clamping behavior |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions - eliminates polarity dependency in AC or floating-bus designs |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) - meets automotive OEM requirements |
| Glass passivated junction | Stable VBR over lifetime and temperature; prevents parameter drift due to moisture or contamination |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow - simplifies SMT manufacturing and inventory management |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and export compliance |
Applications
| Automotive DC/DC Converters | Industrial SMPS Inputs |
|---|---|
Use Scenario: Protecting 24 V input stage of buck converter in engine control unit against load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary transient shunt device placed directly at converter input terminals to clamp surges before they reach controller IC and MOSFET gate drivers. Use Value: Limits peak voltage to ≤39.1 V during 10.7 A transients, preventing damage to 40 V-rated input capacitors and 36 V max-rated PWM controllers. | Use Scenario: Safeguarding 48 V telecom rectifier output against switching noise and lightning-induced surges on backplane distribution lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across output rails to absorb both positive and negative polarity transients generated by relay switching or cable coupling. Use Value: Clamps within 1 ps to protect downstream PoE injectors and Ethernet PHYs rated for ≤57 V absolute maximum, maintaining signal integrity. |
| LED Driver Power Rails | On-Board Battery Management Systems |
Use Scenario: Suppressing inductive kickback from constant-current LED string drivers in streetlight fixtures exposed to ambient temperature swings. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to divert flyback energy away from current-sense amplifier and MCU analog inputs. Use Value: Maintains <1 µA leakage at 21.8 V, avoiding measurement error in precision current regulation while surviving 400 W pulses. | Use Scenario: Guarding cell monitor IC supply pins in 12-cell Li-ion packs subjected to hot-plug transients and ESD events during service access. IC Role / Device Role / Timing Role: Localized TVS per monitored rail to prevent latch-up or burnout of analog front-end circuitry during connector insertion. Use Value: Operates reliably from –55 °C to +150 °C, ensuring protection remains effective across full pack thermal range without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA (Bourns) | Same DO-214AA package; 400 W rating; VBR = 28.9–31.9 V; VC = 43.5 V @ 9.2 A | Higher clamping voltage (+4.4 V) and lower IPPM (−1.5 A) reduce margin for 3.3 V/5 V logic protection | Select when footprint compatibility with SMBJ-series boards is required and higher VC is acceptable |
| 1.5KE27CA (ON Semiconductor) | Through-hole DO-15 package; same 27 V rating; VC = 41.5 V @ 9.6 A; 1500 W rating | Not SMD-compatible; larger board area; higher energy handling but slower response due to parasitic inductance | Choose for legacy through-hole designs or where higher single-pulse energy (>400 W) is needed |
Compared with P4SMA27C, SMBJ27CA offers identical mounting but sacrifices clamping performance, while 1.5KE27CA trades SMT compatibility for greater surge capacity - making P4SMA27C optimal for space-constrained, high-speed automotive and industrial PCBs requiring precise low-VC protection.
Availability
P4SMA27C is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS inputs, and LED driver power rails requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA27C 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q200-qualified product lines.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for ISO 7637-2-compliant automotive and harsh-environment industrial applications - emphasizing reliability, tight parametric control, and seamless SMT integration.
FAQ
What is the polarity configuration of the P4SMA27C?
The P4SMA27C is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Its "C" suffix explicitly denotes bidirectional functionality, eliminating the need for polarity-aware layout - unlike unidirectional variants (e.g., P4SMA27A). This makes P4SMA27C ideal for AC-coupled lines, floating grounds, or differential buses where voltage polarity may reverse during transients.
Does the P4SMA27C meet automotive transient immunity standards?
Yes, the P4SMA27C is explicitly rated to meet ISO 7637-2 for automotive electrical disturbances, covering Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 400 W peak pulse power, low clamping voltage (≤39.1 V), and fast response (<1 ps) ensure robust protection for ECUs, body control modules, and infotainment power supplies in 12 V and 24 V vehicle architectures.
What is the maximum clamping voltage of the P4SMA27C under standard test conditions?
The maximum clamping voltage (VC) of the P4SMA27C is 39.1 V when subjected to its rated peak pulse current of 10.7 A using the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage seen across the device during a worst-case transient - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings.
Can the P4SMA27C be used in place of a unidirectional TVS like P4SMA27A?
No - the P4SMA27C and P4SMA27A are not interchangeable without circuit review. While both share the same VBR range and power rating, P4SMA27A is unidirectional (anode/cathode marked) and only clamps in reverse bias, whereas P4SMA27C clamps symmetrically in both directions. Substituting one for the other may cause unintended conduction or failure to suppress transients in AC or bipolar signal paths.
What is the moisture sensitivity level (MSL) and reflow profile guidance for P4SMA27C?
The P4SMA27C has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it has no floor life limitation and does not require dry-packaging or baking prior to reflow soldering. It is compatible with standard Pb-free reflow profiles (peak temperature ≤260 °C), and its matte tin-plated leads comply with J-STD-002 for solderability - simplifying high-volume SMT assembly and reducing process risk.
P4SMA27C 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA27C FAQ
1.How can I place an order for P4SMA27C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27C 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 P4SMA27C reliable?
The price and inventory of P4SMA27C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA27C is usually 5 days.
3.What payment methods are accepted for P4SMA27C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27C?
P4SMA27C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27C 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 P4SMA27C?
For technical support, including P4SMA27C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27C requirements.
6.How does Aetrix verify that P4SMA27C is sourced from the original manufacturer or authorized distributors?
All P4SMA27C 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 P4SMA27C meets industry standards.
7.What is the process for return or replacement of P4SMA27C?
All P4SMA27C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27C, 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 P4SMA27C part is unused and in its original packaging.
Return procedure for P4SMA27C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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