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Taiwan Semiconductor Corporation P4SMA30CAH
- Part No.:
- P4SMA30CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAH.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,881
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Product details
Overview
P4SMA30CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with a working stand-off voltage of 25.6 V, breakdown voltage range 28.5–31.5 V at 1 mA test current, and clamping voltage of 41.4 V at 10 A peak pulse current. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics protection.
For engineers reviewing the P4SMA30CAH datasheet, P4SMA30CAH pinout, P4SMA30CAH application, or P4SMA30CAH equivalent, this device is selected for robust overvoltage protection in DC/DC converters, SMPS, lighting systems, and automotive power modules where fast response (<1 ps), low leakage (<1 µA), and stable clamping under repetitive transients are critical.
Technical Context
The P4SMA30CAH is a bipolar (bidirectional) TVS diode designed to protect sensitive downstream circuitry from ESD, load dump, and inductive switching transients. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across temperature.
It operates within a junction temperature range of −55 °C to +150 °C, supports peak pulse power of 400 W (10/1000 µs waveform), and exhibits a temperature coefficient of VBR of 0.097 %/°C - enabling predictable clamping behavior in automotive and industrial thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum continuous reverse operating voltage before significant leakage begins; sets system-level overvoltage trip margin. |
| VBR min/max | 28.5 V / 31.5 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transients without false triggering. |
| VC @ IPPM | 41.4 V @ 10 A (10/1000 µs) - Clamping voltage limits maximum stress on protected ICs; enables safe operation of 3.3 V/5 V/12 V logic and power stages. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves battery life and signal integrity in always-on circuits. |
| PPPM | 400 W - Peak pulse power rating defines surge energy handling capacity per single transient event. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-power density PCB layouts without derating. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with cathode band omitted (no polarity marking required for bidirectional operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts in either direction once VBR is exceeded - simplifies layout and eliminates orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - suitable for engine control, body electronics, and ADAS power rails. |
| Glass-passivated junction | Ensures long-term stability of VBR and low IR drift over time and thermal stress - critical for field-deployed equipment. |
| Fast response time | <1.0 ps - Responds before most semiconductor junctions can be damaged by ESD or lightning-induced surges. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - certified for 12 V/24 V vehicle electrical systems. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load dump and jump-start transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on unregulated 12 V supply lines feeding BCM subsystems. Use Value: Prevents latch-up or permanent damage to 3.3 V logic ICs during 35 V/100 ms load dump events per ISO 7637-2 Pulse 5a. | Use Scenario: Shields primary-side controller ICs and gate drivers in isolated flyback or forward converters from MOSFET switching spikes. IC Role / Device Role / Timing Role: Placed across input bulk capacitor to clamp ringing and overshoot caused by transformer leakage inductance and rectifier recovery. Use Value: Maintains VIN rail below 45 V during 100 ns–1 µs spikes, preserving PWM controller functionality and preventing false overvoltage shutdown. |
| LED Driver Power Supply | USB-C PD Adapter Secondary Side |
Use Scenario: Safeguards constant-current LED driver ICs against line surges and hot-plug transients in commercial lighting fixtures. IC Role / Device Role / Timing Role: Connected between output rail and ground to absorb induced transients from nearby AC mains wiring or relay switching. Use Value: Limits voltage excursion to ≤41.4 V during 400 W surges, ensuring LED string integrity and avoiding premature driver IC failure. | Use Scenario: Protects secondary-side synchronous rectifier controllers and USB-C CC logic from reflected primary-side surges and ESD events. IC Role / Device Role / Timing Role: Mounted across secondary output (e.g., 20 V PD rail) to clamp fast-rising transients from transformer coupling or connector insertion. Use Value: Provides sub-µs response to 8 kV contact ESD (IEC 61000-4-2), limiting stress on 20 V-rated PD controller ICs to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | 600 W rating, DO-214AA (SMB) package, VWM = 28.2 V, VC = 53.3 V @ 11.3 A | Higher power handling but larger footprint and higher clamping voltage - less suitable for space-constrained 12 V rail protection. | Select when surge energy exceeds 400 W or board layout allows SMB footprint. |
| 1.5SMC33CA | 1500 W rating, DO-214AB (SMC) package, VWM = 28.2 V, VC = 53.3 V @ 28.3 A | Designed for high-energy industrial transients; significantly larger size and thermal mass - not drop-in for SMA-reflow processes. | Choose only for legacy designs requiring SMC footprint or >1 kW surge immunity. |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA30CAH delivers optimal balance of compact DO-214AC packaging, precise 25.6 V stand-off, and 41.4 V clamping - making it preferred for automotive and portable power applications where board area, thermal profile, and low clamping overhead are design-critical.
Availability
P4SMA30CAH is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, LED driver power supplies, and USB-C PD adapter designs requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for P4SMA30CAH 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 devices.
The P4SMA series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for automotive and industrial power rail protection where reliability, fast response, and standardized DO-214AC compatibility are essential.
FAQ
What does the "CAH" suffix indicate in P4SMA30CAH?
The "CAH" suffix in P4SMA30CAH denotes a bidirectional (C), automotive-grade (A), and halogen-free (H) variant. It confirms the device is symmetrically configured for clamping both positive and negative transients, qualified to AEC-Q101, and compliant with IEC 61249-2-21 for halogen-free materials - distinguishing it from unidirectional "H" or non-automotive "AH" versions.
Is P4SMA30CAH compatible with lead-free reflow soldering processes?
Yes, P4SMA30CAH features matte tin-plated leads and is rated for moisture sensitivity level 1 per J-STD-020, supporting standard Pb-free reflow profiles up to 260 °C peak. Its DO-214AC package and terminal finish comply with J-STD-002 for solderability, making it suitable for automated SMT assembly without pre-baking.
How does P4SMA30CAH differ from P4SMA30AH?
P4SMA30CAH is bidirectional (CAH), while P4SMA30AH is unidirectional (AH). The "C" adds symmetrical clamping capability - critical for protecting AC-coupled or floating rails. Electrically, P4SMA30CAH has identical VWM (25.6 V), VBR (28.5–31.5 V), and VC (41.4 V) ratings but lacks polarity marking and supports dual-polarity surge suppression - a functional distinction confirmed in TSC's ordering notes.
What is the maximum peak pulse current rating for P4SMA30CAH?
The maximum peak impulse current (IPPM) for P4SMA30CAH is 10 A under the standard 10/1000 µs double-exponential waveform. This value is derived directly from its 400 W peak pulse power rating and 41.4 V clamping voltage (IPPM = PPPM/VC), and is validated per Figure 5 in the TSC datasheet.
Does P4SMA30CAH meet ISO 7637-2 requirements for automotive applications?
Yes, P4SMA30CAH explicitly meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test conditions as stated in the TSC datasheet. Its 400 W rating, low clamping voltage, and AEC-Q101 qualification collectively ensure compliance for 12 V vehicle network protection - including load dump, supply interruption, and capacitive coupling transients.
P4SMA30CAH 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 10A
- 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)
P4SMA30CAH FAQ
1.How can I place an order for P4SMA30CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAH 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 P4SMA30CAH reliable?
The price and inventory of P4SMA30CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30CAH is usually 5 days.
3.What payment methods are accepted for P4SMA30CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAH?
P4SMA30CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAH 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 P4SMA30CAH?
For technical support, including P4SMA30CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAH requirements.
6.How does Aetrix verify that P4SMA30CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAH 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 P4SMA30CAH meets industry standards.
7.What is the process for return or replacement of P4SMA30CAH?
All P4SMA30CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAH, 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 P4SMA30CAH part is unused and in its original packaging.
Return procedure for P4SMA30CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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