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Taiwan Semiconductor Corporation P4SMA180A
- Part No.:
- P4SMA180A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA180A.pdf
- Description:
- TVS DIODE 154VWM 246VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,169
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Product details
Overview
P4SMA180A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), 154V working stand-off voltage (VWM), and 246V maximum clamping voltage (VC) at 1.7A peak impulse current. It protects DC/DC converters and SMPS inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA180A datasheet, P4SMA180A pinout, P4SMA180A application, or P4SMA180A equivalent, key selection criteria include its 154V VWM, 246V VC at 1.7A, <1μA reverse leakage at VWM, -55°C to +150°C operating junction temperature, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA180A operates as a unidirectional avalanche diode, conducting only during negative transients relative to its cathode-marked terminal. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1μA at 154V), while its fast response time (<1.0ps) enables suppression of nanosecond-scale ESD and surge events.
Designed for single-die configuration in DO-214AC, it complies with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards. Its thermal derating follows Fig.2 - full 400W rating at TA = 25°C, linearly reduced to zero at TA = 150°C - supporting reliable operation in high-ambient industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 154 V - Maximum continuous reverse voltage before clamping begins; sets system overvoltage trip threshold |
| VBR min/max | 171 V / 189 V @ 1 mA - Confirmed avalanche onset range; ensures consistent turn-on across production lot |
| VC @ IPPM | 246 V @ 1.7 A (10/1000μs) - Clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W - Peak transient power handling capability; defines survivability under ISO 7637-2 Pulse 3b |
| IR @ VWM | <1 μA - Negligible standby leakage; avoids loading sensitive 154V bias rails |
| TJ max | +150 °C - Enables use in enclosed, thermally constrained power modules without derating penalty |
| Package | DO-214AC (SMA) - Standardized SMT footprint; compatible with IPC-7351B generic SMA land pattern |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; must be routed with minimal inductance to preserve clamping speed |
| Cathode (banded) | Protected line input | Connected to line being safeguarded (e.g., +154V rail); clamps transients toward anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5.5%) and long-term reliability under repeated surge stress |
| Fast response time <1.0 ps | Enables suppression of ESD events before downstream ICs experience latch-up or gate oxide damage |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard J-STD-020 handling and storage |
| RoHS & halogen-free compliance | Fulfills IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Validated for automotive and industrial 12V/24V supply line protection per international EMC immunity standard |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input stage of 150–200V-rated AC/DC front-end or isolated DC/DC module exposed to load dump and coupling transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp on primary-side high-voltage rail, shunting surge energy to ground before it reaches controller ICs or MOSFET gates. Use Value: Limits voltage excursion to ≤246V during 1.7A 10/1000μs surge, preventing overvoltage failure of 200V-rated primary-side components. | Use Scenario: Protection of 154V intermediate bus feeding point-of-load regulators in telecom or server power architecture. IC Role / Device Role / Timing Role: Standoff protector on distributed 154V bus; activates only during line faults or switching noise spikes exceeding VWM. Use Value: Maintains <1μA leakage at nominal 154V, avoiding unnecessary power loss while delivering 400W transient immunity. |
| Lighting Application | Adapters |
Use Scenario: LED driver input in industrial high-bay lighting subjected to lightning-induced surges on 120/230VAC mains. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of bridge rectifier and bulk capacitor; absorbs energy before rectified DC rail. Use Value: Withstands 400W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4kV) when combined with series impedance. | Use Scenario: Secondary-side output protection in universal-input wall adapters supplying 150V+ auxiliary rails for smart home hubs or PoE injectors. IC Role / Device Role / Timing Role: Output rail clamp preventing overvoltage propagation to connected devices during adapter fault conditions. Use Value: 246V clamping voltage ensures connected 150V-rated logic remains within safe operating area during 1.7A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180A (Bourns) | Same 154V VWM, 246V VC, but in larger DO-214AA (SMB) package; 600W PPPM | Higher power rating suits higher-energy surge environments; requires larger PCB footprint | Select SMBJ180A when system-level surge testing exceeds 400W or when thermal margin is constrained |
| 1.5SMC180A (ON Semiconductor) | Identical VWM/VC specs, same DO-214AC package, but rated for 1500W PPPM (10/1000μs) | Higher peak power allows single-device coverage of both ISO 7637-2 and IEC 61000-4-5 Level 4 requirements | Choose 1.5SMC180A if future design expansion requires headroom beyond 400W or dual-standard compliance |
Compared with P4SMA180A, SMBJ180A offers greater surge margin in a larger package, while 1.5SMC180A delivers identical form factor with triple the peak power - enabling direct layout reuse where higher energy immunity is mandated.
Availability
P4SMA180A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and industrial lighting applications requiring stable component supply and guaranteed long-term manufacturability.
Supply support for P4SMA180A 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, automotive, and consumer markets.
The P4SMA series targets cost-sensitive, high-volume transient protection needs in power conversion systems, emphasizing robustness, automated assembly compatibility, and compliance with global EMC standards like ISO 7637-2.
FAQ
What is the maximum clamping voltage of P4SMA180A under standard test conditions?
The P4SMA180A has a maximum clamping voltage (VC) of 246 V when subjected to a 10/1000μs waveform peak impulse current of 1.7 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream 200V-rated components remain within safe operating limits.
Is P4SMA180A suitable for bidirectional transient protection?
No, P4SMA180A is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications, the CA-suffixed variant (e.g., P4SMA180CA) must be used. The "A" suffix in P4SMA180A denotes tighter VBR tolerance (±5.5%), not bidirectional capability - using P4SMA180A on AC lines risks catastrophic failure due to forward conduction during negative half-cycles.
What is the reverse leakage current specification for P4SMA180A at its working stand-off voltage?
At its rated working stand-off voltage (VWM) of 154 V, the P4SMA180A exhibits a maximum reverse leakage current (IR) of 1 μA at 25°C. This ultra-low leakage ensures minimal power loss and no measurable loading effect on 154V bias rails, making it suitable for always-on industrial control circuits where standby current budget is tightly constrained.
Does P4SMA180A meet automotive EMC requirements?
Yes, P4SMA180A is explicitly validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms - the core transient immunity requirements for 12V and 24V automotive electrical systems. Its 400W peak pulse rating, fast <1.0ps response, and stable clamping performance make it appropriate for protecting infotainment power inputs, body control modules, and ADAS sensor interfaces against battery line disturbances.
What is the package type and lead finish of P4SMA180A?
P4SMA180A uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability requirements. The package features a green molding compound rated UL 94V-0, moisture sensitivity level 1 per J-STD-020, and JESD201 Class 2 whisker resistance - enabling direct placement into standard reflow profiles without pre-bake or special handling.
P4SMA180A 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):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
P4SMA180A FAQ
1.How can I place an order for P4SMA180A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA180A 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 P4SMA180A reliable?
The price and inventory of P4SMA180A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA180A is usually 5 days.
3.What payment methods are accepted for P4SMA180A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA180A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA180A?
P4SMA180A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA180A 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 P4SMA180A?
For technical support, including P4SMA180A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA180A requirements.
6.How does Aetrix verify that P4SMA180A is sourced from the original manufacturer or authorized distributors?
All P4SMA180A 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 P4SMA180A meets industry standards.
7.What is the process for return or replacement of P4SMA180A?
All P4SMA180A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA180A, 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 P4SMA180A part is unused and in its original packaging.
Return procedure for P4SMA180A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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