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Taiwan Semiconductor Corporation P4SMA7.5C
- Part No.:
- P4SMA7.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5C.pdf
- Description:
- 400W, 7.5V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,602
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Product details
Overview
P4SMA7.5C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping fast transients in DC power rails and signal lines. It features a 7.5V nominal breakdown voltage (6.75–8.25V), 6.05V working stand-off voltage, 11.7V maximum clamping voltage at 35A peak pulse current, and 400W peak pulse power rating under 10/1000μs waveform.
For engineers reviewing the P4SMA7.5C datasheet, P4SMA7.5C pinout, P4SMA7.5C application, or P4SMA7.5C equivalent, key selection criteria include bidirectional surge protection capability, low clamping ratio (VC/VWM ≈ 1.93), compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and suitability for automotive and industrial DC/DC converter input protection where space-constrained SMA packaging is required.
Technical Context
The P4SMA7.5C implements a silicon avalanche junction structure with glass passivation for stable breakdown behavior and low leakage (<500µA at 6.05V). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints.
It delivers sub-1ps response time and operates across –55°C to +150°C junction temperature range, supporting robust transient suppression in switching mode power supplies and automotive electronics subject to load dump and inductive switching events per ISO 7637-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.75V / 8.25V - Ensures reliable avalanche conduction onset within defined tolerance band at 10mA test current |
| VWM | 6.05V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin below breakdown |
| IPPM | 35.0A - Peak surge current handled under 10/1000μs waveform; defines transient energy absorption capacity |
| VC@IPPM | 11.7V - Clamped voltage during 35A surge; determines protected circuit's maximum stress level |
| PPPM | 400W - Peak pulse power dissipation capability; correlates directly with IEC/ISO surge immunity level |
| IR@VWM | <500µA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +150°C - Enables operation in under-hood automotive or enclosed industrial environments without derating |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; dual-terminal construction optimized for automated placement and reflow soldering. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient return path for negative polarity surges | Completes bidirectional clamping loop; symmetric with cathode under reverse bias |
| Cathode (banded end) | Transient return path for positive polarity surges | Standard polarity marker; functions identically to anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating DC rails without external polarity management |
| ISO 7637-2 compliance | Validated for automotive load dump (Pulse 2b), supply interruption (Pulse 3a/3b), and coupled transients (Pulse 1/2a) |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard SMT assembly without special handling |
| UL 94V-0 molding compound | Ensures flame resistance in safety-critical power supply and lighting applications |
| 0.060g weight | Minimizes mechanical stress on PCB during thermal cycling and vibration in automotive modules |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Input stage protection against line transients and ESD in 12V/24V offline SMPS units. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across primary-side bulk capacitor or rectifier output. Use Value: Limits voltage excursions to ≤11.7V during 35A surges, preventing MOSFET gate oxide failure and controller latch-up. | Use Scenario: Protection of 5V/3.3V point-of-load regulators fed from vehicle battery rail subject to load dump. IC Role / Device Role / Timing Role: Bidirectional TVS shunting transients between VIN and GND before DC/DC controller input. Use Value: Maintains regulated output stability by clamping spikes within 1.93× VWM, meeting ISO 7637-2 Pulse 2b immunity requirements. |
| LED Driver Module | Industrial Sensor Interface |
Use Scenario: Surge protection on constant-current LED string inputs exposed to field wiring in streetlight or signage systems. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing inductive kickback from relay-controlled drivers and lightning-induced surges. Use Value: Withstands 400W pulses without degradation, preserving luminous output consistency over 10-year outdoor deployment. | Use Scenario: Signal line protection for 4–20mA or RS-485 sensor nodes in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional clamp on differential pair or single-ended analog input to prevent ADC saturation. Use Value: Sub-1ps response ensures clamping activation before transient propagates into precision amplifier front-end, reducing measurement error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA | 600W rating, SMB package (larger footprint), 7.0V VBR min (6.67V), 12.0V VC @ 43.3A | Higher power handling but requires PCB area increase; better suited for higher-energy transients | Select when system-level testing reveals >400W surge exposure or when existing layout allows SMB footprint |
| 1.5KE7.5C | 1500W rating, DO-201 package (through-hole), 7.5V VBR (6.75–8.25V), 12.0V VC @ 125A | Through-hole mounting only; incompatible with automated SMT lines; used in legacy or high-reliability repair contexts | Choose only for manual assembly, field repair, or where mechanical robustness outweighs board space constraints |
Compared with SMBJ7.0CA and 1.5KE7.5C, the P4SMA7.5C offers optimal balance of 400W surge capability, DO-214AC footprint compatibility with high-density layouts, and ISO 7637-2 validation-making it preferred for new automotive and industrial SMT designs requiring certified bidirectional clamping.
Availability
P4SMA7.5C is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and LED driver modules requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA7.5C 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 and automotive markets.
The P4SMA7.5C belongs to TSC's P4SMAx series of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient suppression in space-constrained automotive and industrial power systems.
FAQ
What does the 'C' suffix indicate in P4SMA7.5C?
The 'C' suffix in P4SMA7.5C denotes bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA7.5), the P4SMA7.5C has no polarity-dependent terminals and functions identically in either orientation-critical for protecting AC-coupled interfaces or floating DC rails where voltage polarity reversal may occur.
Is P4SMA7.5C compliant with automotive transient standards?
Yes, P4SMA7.5C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a (battery disconnect), Pulse 2b (load dump), and Pulses 3a/3b (capacitive coupling and line impedance effects). This certification is explicitly stated in the official Taiwan Semiconductor datasheet (Version S2102) and confirms its suitability for 12V/24V automotive electronic control units, body controllers, and infotainment power inputs.
What is the maximum clamping voltage of P4SMA7.5C and how is it measured?
The maximum clamping voltage of P4SMA7.5C is 11.7V, measured at 35.0A peak pulse current under the standardized 10/1000μs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a specified surge event, directly determining the stress imposed on downstream components like DC/DC controllers or microcontrollers powered from the same rail.
Can P4SMA7.5C replace P4SMA7.5A in a design?
No-P4SMA7.5C and P4SMA7.5A are not interchangeable. P4SMA7.5C is bidirectional with VBR = 6.75–8.25V and VWM = 6.05V, while P4SMA7.5A is unidirectional with tighter VBR tolerance (7.13–7.88V) and higher VWM (6.40V). Substituting P4SMA7.5C for P4SMA7.5A introduces unnecessary bidirectional leakage paths and reduces stand-off margin, potentially compromising protection in polarized circuits.
What is the moisture sensitivity level (MSL) of P4SMA7.5C and what does it mean for assembly?
P4SMA7.5C has Moisture Sensitivity Level 1 per J-STD-020, indicating unlimited floor life at ≤30°C/60% RH and no baking required prior to reflow soldering. This simplifies SMT manufacturing by eliminating moisture-related popcorning risks and streamlining handling-especially valuable for high-volume automotive and industrial production lines using standard reflow profiles.
P4SMA7.5C 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):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 35A
- 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)
P4SMA7.5C FAQ
1.How can I place an order for P4SMA7.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5C 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 P4SMA7.5C reliable?
The price and inventory of P4SMA7.5C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5C is usually 5 days.
3.What payment methods are accepted for P4SMA7.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5C?
P4SMA7.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5C 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 P4SMA7.5C?
For technical support, including P4SMA7.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5C requirements.
6.How does Aetrix verify that P4SMA7.5C is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5C 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 P4SMA7.5C meets industry standards.
7.What is the process for return or replacement of P4SMA7.5C?
All P4SMA7.5C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5C, 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 P4SMA7.5C part is unused and in its original packaging.
Return procedure for P4SMA7.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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