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Taiwan Semiconductor Corporation P4SMA30
- Part No.:
- P4SMA30
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30.pdf
- Description:
- 400W, 30V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
P4SMA30 from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails. It features a 24.3 V working stand-off voltage (VWM), 27.0–33.0 V breakdown voltage (VBR) at 1 mA, 43.5 V maximum clamping voltage (VC) under 9.6 A 10/1000 µs surge, 400 W peak pulse power rating, and DO-214AC (SMA) package - used in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA30 datasheet, P4SMA30 pinout, P4SMA30 application, or P4SMA30 equivalent, key selection criteria include clamping performance at rated surge current, leakage current ≤1 µA at VWM, thermal stability up to +150°C junction temperature, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and UL 94V-0 molded compound suitability for automated SMT assembly.
Technical Context
The P4SMA30 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (27.0–33.0 V) to shunt transient energy to ground. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 24.3 V), while fast response time (<1.0 ps) enables effective suppression of ESD and load-dump transients.
Rated for 400 W peak pulse power (10/1000 µs waveform), it supports surge currents up to 9.6 A and maintains clamping voltage ≤43.5 V - critical for protecting downstream ICs such as PWM controllers and gate drivers. The device is not bidirectional; polarity is marked by cathode band per DO-214AC mechanical drawing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.3 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR @ IT=1 mA | 27.0–33.0 V - verified avalanche onset range; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM=9.6 A | 43.5 V - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient stress. |
| PPPM | 400 W - peak pulse power handling capability; validates robustness against automotive load dump and ISO 7637-2 pulses. |
| IR @ VWM | ≤1 µA - ultra-low reverse leakage; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max | +150 °C - maximum junction temperature; supports operation in enclosed power supply enclosures and under high ambient conditions. |
| Package | DO-214AC (SMA) - industry-standard SMT outline with matte tin-plated leads, J-STD-002 solderability, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-214AC (SMA) surface-mount package with axial lead configuration: Cathode (marked end) and Anode (unmarked end). Polarity is indicated by a visible cathode band on the molded body. Leads are matte tin-plated and compliant with J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient return path / clamping node | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when Vreverse > VBR. |
| Anode | Reference / ground reference terminal | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Clamping voltage ≤43.5 V at 9.6 A | Provides defined overvoltage ceiling for sensitive 3.3 V/5 V/12 V logic and power ICs without derating headroom loss. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validates suitability for automotive 12 V battery-line protection without additional filtering or staging. |
| Moisture sensitivity level 1 (J-STD-020) | Enables standard SMT reflow without dry-pack or baking - reduces manufacturing overhead and floor-life constraints. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes under flame exposure, meeting safety requirements for enclosed power electronics. |
Applications
| Switching Mode Power Supply (SMPS) | On-Board DC/DC Converter |
|---|---|
Use Scenario: Input-stage protection against line surges and coupling transients in AC/DC adapters and isolated flyback converters. IC Role / Device Role: Primary-side TVS clamp placed between input rectifier output and bulk capacitor. Use Value: Limits transient voltage to ≤43.5 V, preventing overvoltage failure of primary-side controller ICs and MOSFETs rated for 65 V drain-source. |
Use Scenario: Protection of point-of-load (POL) converter inputs in industrial PLCs and telecom modules exposed to board-level coupling noise. IC Role / Device Role: Unidirectional surge suppressor on 12 V or 24 V input rail upstream of buck controller. Use Value: Maintains <1 µA leakage at 24.3 V, avoiding interference with feedback networks while clamping 9.6 A surges within safe VC margin. |
| Lighting Application | Automotive Body Control Module (BCM) |
Use Scenario: Overvoltage suppression in LED driver front-end circuits subjected to hot-swap and inductive kickback from relay coils. IC Role / Device Role: Standoff-rated TVS on constant-current driver input to absorb 400 W transients. Use Value: Withstands repeated 10/1000 µs surges without degradation, supporting >100,000-cycle lighting system lifetime. |
Use Scenario: Load-dump protection on 12 V supply lines feeding microcontrollers and CAN transceivers in BCM subassemblies. IC Role / Device Role: Unidirectional TVS aligned with battery polarity to clamp ISO 7637-2 Pulse 5a (load dump) events. Use Value: Clamps to 43.5 V within <1 ps, limiting stress on 40 V-rated MCU I/O and LIN transceivers without requiring series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A (Bourns) | Bidirectional variant; VWM = 25.6 V, VC = 48.4 V @ 8.3 A; DO-214AA (SMB) package - 2.5 mm wider than SMA. | Supports AC-coupled or floating-rail protection; higher VC reduces margin for 3.3 V logic interfaces. | Select only if bidirectional clamping or SMB footprint compatibility is required; not drop-in due to package and polarity differences. |
| 1.5SMC33A (ON Semiconductor) | Same unidirectional function; VWM = 28.2 V, VC = 49.9 V @ 8.4 A; DO-214AB (SMC) package - 3× larger footprint and higher thermal mass. | Higher VWM increases risk of false triggering near 24 V nominal rails; suited for 28 V systems. | Prefer for higher-power 1.5 kW surge handling; avoid for space-constrained 24 V SMPS where P4SMA30's 400 W / SMA fit is optimal. |
Compared with SMBJ30A and 1.5SMC33A, the P4SMA30 offers tighter VWM–VBR alignment for 24 V systems, lowest profile DO-214AC footprint, and lowest clamping voltage in its class - making it optimal for compact, cost-sensitive, unidirectional DC rail protection where layout area and voltage margin are critical.
Availability
P4SMA30 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and automotive body control modules requiring stable component supply, consistent parametric performance, and full traceability through J-STD-020-compliant packaging.
Supply support for P4SMA30 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 P4SMA30 belongs to TSC's P4SMAx family of 400 W surface-mount TVS diodes engineered for high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing low clamping voltage, tight VBR tolerance, and automated assembly compatibility.
FAQ
What is the polarity configuration of the P4SMA30?
The P4SMA30 is a unidirectional TVS diode with cathode marked by a visible band on the DO-214AC (SMA) package body. It conducts only when reverse-biased above its breakdown voltage (27.0–33.0 V), making it suitable for DC rail protection where polarity is fixed. Bidirectional variants require "CA" suffixes (e.g., P4SMA30CA), which the P4SMA30 does not have.
Does the P4SMA30 meet automotive transient standards?
Yes, the P4SMA30 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for electrical disturbances in road vehicles. Its 400 W peak pulse power rating and 43.5 V clamping voltage at 9.6 A ensure robust suppression of coupled transients and supply-line noise in 12 V automotive subsystems - confirmed in Taiwan Semiconductor's official test reports for the P4SMAx series.
What is the maximum junction temperature rating for the P4SMA30?
The P4SMA30 has a maximum junction temperature (TJ max) of +150°C, validated per absolute maximum ratings in the datasheet. This allows reliable operation in thermally demanding environments such as enclosed power supplies and engine bay-adjacent modules, provided PCB copper area and airflow meet TSC's thermal derating guidelines in Figure 2 of the P4SMAx datasheet.
How does the P4SMA30 compare to the P4SMA30A variant?
The P4SMA30A offers tighter breakdown voltage tolerance (28.5–31.5 V vs. 27.0–33.0 V for P4SMA30) and slightly higher VWM (25.6 V vs. 24.3 V), resulting in lower leakage and improved noise immunity. However, the P4SMA30 provides broader VBR coverage and lower clamping voltage (43.5 V vs. 41.4 V for P4SMA30A), making it preferable where surge margin is prioritized over precision standoff.
Is the P4SMA30 RoHS and halogen-free compliant?
Yes, the P4SMA30 is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads satisfy J-STD-002 solderability requirements - all verified in Taiwan Semiconductor's product compliance documentation for the P4SMAx series (Version S2102).
P4SMA30 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):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 9.6A
- 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)
P4SMA30 FAQ
1.How can I place an order for P4SMA30 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30 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 P4SMA30 reliable?
The price and inventory of P4SMA30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30 is usually 5 days.
3.What payment methods are accepted for P4SMA30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30?
P4SMA30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30 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 P4SMA30?
For technical support, including P4SMA30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30 requirements.
6.How does Aetrix verify that P4SMA30 is sourced from the original manufacturer or authorized distributors?
All P4SMA30 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 P4SMA30 meets industry standards.
7.What is the process for return or replacement of P4SMA30?
All P4SMA30 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30, 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 P4SMA30 part is unused and in its original packaging.
Return procedure for P4SMA30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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