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Taiwan Semiconductor Corporation P4SMA180
- Part No.:
- P4SMA180
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA180.pdf
- Description:
- 400W, 180V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,283
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Product details
Overview
P4SMA180 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 146 V working stand-off voltage (VWM), 162–198 V breakdown voltage (VBR) at 1 mA, 258 V maximum clamping voltage (VC) under 1.6 A 10/1000 μs surge, 400 W peak pulse power rating, and DO-214AC (SMA) package - used in automotive power supplies and industrial DC/DC converters.
For engineers reviewing the P4SMA180 datasheet, P4SMA180 pinout, P4SMA180 application, or P4SMA180 equivalent, key selection criteria include clamping performance at rated surge current, junction temperature derating above 25°C, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, moisture sensitivity level (MSL 1), and unidirectional polarity marking on the SMA package body.
Technical Context
The P4SMA180 operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time (<1.0 ps) and low leakage (<1 µA at VWM). Its clamping behavior follows standardized 10/1000 μs double-exponential surge waveform per R.E.A. and ANSI/IEEE C62.35, with thermal derating governed by Fig.2 in the datasheet.
It is rated for TJ = –55°C to +150°C operation and storage, supports 40 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), and maintains stable VBR temperature coefficient of 0.108 %/°C - critical for systems exposed to wide ambient swings such as vehicle ECUs and outdoor power electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 146 V - maximum continuous reverse voltage before significant leakage; defines safe operating DC rail margin. |
| VBR min/max | 162–198 V @ 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 258 V @ 1.6 A (10/1000 μs) - peak clamped voltage during worst-case surge; determines protected circuit's voltage stress ceiling. |
| PPPM | 400 W - peak pulse power handling capacity; enables protection against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect). |
| IR @ VWM | <1 µA - ultra-low reverse leakage at stand-off voltage; preserves efficiency in high-impedance sensing or battery-backed circuits. |
| TJ max | +150°C - maximum junction temperature; supports placement near heat sources like MOSFETs or inlets in sealed enclosures. |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (cathode terminal), weight ≈ 0.060 g, UL 94V-0 rated compound, JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge events up to 3.5 V @ 25 A. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); avalanches when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress without parameter drift. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a (supply interruption), Pulse 2b (battery disconnection), and Pulses 3a/3b (capacitive coupling transients) - essential for automotive ECU design. |
| MSL Level 1 | No floor life limitation or bake requirement before reflow; simplifies SMT manufacturing and inventory management. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - required for export to EU, Japan, and China markets. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protects 12 V supply input of BCM from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and chassis ground, acting as first-line overvoltage defense. Use Value: Limits transient voltage to ≤258 V during 1.6 A surge, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shields isolated DC/DC converter primary-side MOSFET gate drivers and feedback resistors from flyback-induced voltage spikes. IC Role / Device Role / Timing Role: Standoff protector on input bus (e.g., 48 V nominal), absorbing repetitive switching noise and rare surges without degradation. Use Value: Maintains <1 µA leakage at 146 V, avoiding bias current errors in precision feedback networks while surviving 400 W pulses. |
| LED Driver Power Supply | Telecom Remote Radio Unit (RRU) Power Interface |
Use Scenario: Guards constant-current LED driver IC inputs against ESD and lightning-induced surges on AC-DC adapter outputs. IC Role / Device Role / Timing Role: Secondary-side TVS on low-voltage DC output (e.g., 24 V), oriented anode-to-ground to clamp negative transients. Use Value: Sub-1.0 ps response ensures clamping initiates before sensitive driver ICs experience latch-up or gate oxide rupture. |
Use Scenario: Installed at outdoor RRU power entry point to suppress induced surges from nearby lightning strikes on tower-mounted cabling. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on -48 V telecom supply rail, configured unidirectionally with cathode to rail. Use Value: Withstands 40 A single-half-sine surge (IFSM), enabling survival of multi-kA induced currents coupled via long feeder cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180A | Bidirectional variant; same VWM (146 V), but symmetric clamping (VC = 258 V in both directions); slightly larger SMB package (DO-214AA). | Required where bidirectional line protection is needed (e.g., data lines, AC-coupled signals); not suitable for unidirectional DC rails without redesign. | Select P4SMA180 for cost-sensitive, space-constrained unidirectional DC protection; choose SMBJ180A only if polarity-agnostic clamping is mandated. |
| 1.5KE180A | Through-hole TO-204AE (DO-201AE) package; identical electrical specs (VWM = 146 V, VC = 258 V), but higher IFSM (100 A) and larger thermal mass. | Used in legacy designs or high-reliability military/aerospace where leaded components are preferred; incompatible with SMT-only assembly. | Prefer P4SMA180 for new SMT designs requiring automated placement and MSL-1 compliance; retain 1.5KE180A only for through-hole retrofit or thermal-heavy environments. |
Compared with SMBJ180A and 1.5KE180A, the P4SMA180 offers optimal balance of SMT manufacturability, MSL-1 handling, and proven ISO 7637-2 compliance in compact DO-214AC - making it the preferred choice for volume automotive and industrial DC power protection where unidirectional clamping suffices.
Availability
P4SMA180 is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converters, LED driver power supplies, and telecom remote radio unit interfaces requiring stable component supply and full traceability.
Supply support for P4SMA180 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, and power MOSFETs since 1979.
The P4SMA180 belongs to TSC's P4SMAx series of 400 W surface-mount TVS diodes engineered specifically for automotive-grade transient immunity and industrial power rail hardening - emphasizing reliability under ISO 7637-2 and JEDEC moisture sensitivity requirements.
FAQ
What is the polarity configuration of the P4SMA180?
The P4SMA180 is a unidirectional TVS diode with cathode marked by a band on the DO-214AC (SMA) package body. When installed, the cathode connects to the protected line (e.g., +12 V rail) and the anode to ground. This orientation enables clamping only during reverse overvoltage events, while allowing normal forward conduction up to 3.5 V at 25 A - a key distinction from bidirectional variants like P4SMA180A.
Does the P4SMA180 meet automotive transient standards?
Yes, the P4SMA180 meets ISO 7637-2 requirements for Pulses 1 (inductive load dump), 2a (supply interruption), 2b (battery disconnection), and 3a/3b (capacitive coupling), as confirmed in the official Taiwan Semiconductor datasheet Version S2102. Its 400 W peak pulse power rating and 258 V clamping voltage at 1.6 A ensure compliance with the voltage limits specified for Class III/IV vehicle subsystems.
What is the maximum operating temperature for the P4SMA180?
The P4SMA180 has a maximum junction temperature (TJ) of +150°C and operates across –55°C to +150°C. Derating of peak pulse power begins above TA = 25°C per Figure 2 in the datasheet, with usable power dropping to ~200 W at +85°C ambient. This makes the P4SMA180 suitable for under-hood automotive locations and enclosed industrial power supplies where thermal management is constrained.
How does the P4SMA180 compare to the P4SMA180A variant?
The P4SMA180 is unidirectional with VBR = 162–198 V and VWM = 146 V, while the P4SMA180A is also unidirectional but tighter-tolerance (VBR = 171–189 V, VWM = 154 V). Both share identical 400 W PPPM and DO-214AC packaging. The "A" suffix denotes ±5% VBR tolerance versus ±10% for standard grade - critical for designs requiring precise clamping threshold control without margin overhead.
Is the P4SMA180 compliant with environmental regulations?
Yes, the P4SMA180 is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads satisfy J-STD-002 solderability requirements. Moisture sensitivity level is rated MSL 1 - meaning no floor life limitation or baking is required prior to reflow soldering.
P4SMA180 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):
- 146V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 258V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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)
P4SMA180 FAQ
1.How can I place an order for P4SMA180 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA180 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 P4SMA180 reliable?
The price and inventory of P4SMA180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA180 is usually 5 days.
3.What payment methods are accepted for P4SMA180?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA180 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA180?
P4SMA180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA180 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 P4SMA180?
For technical support, including P4SMA180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA180 requirements.
6.How does Aetrix verify that P4SMA180 is sourced from the original manufacturer or authorized distributors?
All P4SMA180 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 P4SMA180 meets industry standards.
7.What is the process for return or replacement of P4SMA180?
All P4SMA180 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA180, 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 P4SMA180 part is unused and in its original packaging.
Return procedure for P4SMA180:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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