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Vishay General Semiconductor - Diodes Division P4SMA180CAHM3/I
- Part No.:
- P4SMA180CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA180CAHM3/I.pdf
- Description:
- TVS DIODE 154VWM 246VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,163
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Product details
Overview
P4SMA180CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features 180 V standoff voltage (VWM), 207 V breakdown voltage (VBR) at 1 mA, 246 V maximum clamping voltage (VC) at 1.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and telecom line drivers.
For engineers reviewing the P4SMA180CAHM3/I datasheet, P4SMA180CAHM3/I pinout, P4SMA180CAHM3/I application, or P4SMA180CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
The P4SMA180CAHM3/I operates as a bidirectional avalanche diode, exhibiting symmetrical clamping behavior in both polarities with no polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with fast response time (<1.0 ns) and low incremental surge resistance - enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients in industrial and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 154 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for protected circuit. |
| VBR (Breakdown Voltage) | 171–189 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 246 V at IPPM = 1.2 A - peak voltage seen by downstream circuit during full-rated transient; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - energy-handling capacity for single transient events; derates to 300 W above 91 V per spec. |
| ID (Reverse Leakage) | <1 µA at 154 V - minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | 150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetric with cathode in bidirectional operation | Enables clamping during positive or negative transients without external polarity assignment. |
| Cathode | Current exit terminal in forward bias; symmetric with anode in bidirectional operation | Eliminates need for orientation-aware placement; simplifies automated assembly on bidirectional lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ADAS sensor modules and body control units. |
| 400 W peak pulse power (10/1000 µs) | Robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation under repetitive stress. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT processes without preconditioning or special handling. |
| Glass-passivated junction | Stable VBR tolerance (±5%) and low leakage across -65 °C to +150 °C operating range - ensures consistent clamping in harsh environments. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU for sustainable manufacturing. |
Applications
| Automotive Sensor Protection | Industrial Ethernet Port Protection |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching PHY IC. Use Value: Maintains signal integrity below 246 V clamping threshold while surviving 400 W pulses - prevents latch-up or damage to 5 V tolerant transceivers. |
Use Scenario: Safeguarding RJ45 PHY pins against induced surges in factory automation gateways. IC Role / Device Role / Timing Role: Primary TVS device on differential pair lines (e.g., TX+/TX−), mounted adjacent to magnetics. Use Value: Low capacitance (~30 pF at 0 V) avoids signal distortion at 100 Mbps; 154 V VWM allows compatibility with 24 V PoE-powered systems. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Shielding DSL/VDSL line drivers from lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing fast-response clamping. Use Value: Sub-1 ns response time captures fast-rising edges missed by slower primary protectors; 171–189 V VBR aligns with ITU-T K.20 coordination requirements. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Across-motor terminals to clamp inductive kickback during PWM commutation. Use Value: 40 A IFSM rating handles repeated motor stall currents; 150 °C TJ max enables mounting near heat-generating motor drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180CA | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; RθJA = 80 °C/W vs. 120 °C/W | Better thermal performance but requires 30% more board area; less suitable for space-constrained automotive modules | Select when higher power derating margin is needed and PCB real estate permits larger footprint. |
| 1.5KE180CA | Through-hole TO-218 package; same electrical specs but 1500 W PPPM rating and higher IFSM (100 A) | Designed for high-energy AC mains protection; not suitable for SMT-only production or high-frequency signal lines | Choose only for legacy through-hole designs or where surge energy exceeds 400 W capability. |
Compared with SMBJ180CA and 1.5KE180CA, the P4SMA180CAHM3/I offers optimal balance of miniaturized SMT form factor, AEC-Q101 qualification, and sufficient 400 W surge handling for signal-line protection - making it preferred for next-generation automotive and industrial edge devices.
Availability
P4SMA180CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial Ethernet gateways, telecom line interfaces, and consumer appliance motor controllers requiring stable component supply with halogen-free, AEC-Q101-qualified TVS protection.
Supply support for P4SMA180CAHM3/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and telecom markets - delivering standardized TVS performance in compact, qualified surface-mount packages.
FAQ
What does the "HM3" suffix indicate in P4SMA180CAHM3/I?
The HM3 suffix in P4SMA180CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance, MSL Level 1 moisture sensitivity, and 260 °C peak reflow tolerance - essential for automotive and industrial applications requiring long-term reliability and environmental compliance.
Is P4SMA180CAHM3/I unidirectional or bidirectional?
P4SMA180CAHM3/I is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping in both polarities with no cathode band marking, enabling use on AC-coupled or differential signal lines without polarity concerns - unlike unidirectional variants (e.g., P4SMA180A) which require correct orientation.
What is the maximum clamping voltage of P4SMA180CAHM3/I under rated surge conditions?
The maximum clamping voltage (VC) of P4SMA180CAHM3/I is 246 V at 1.2 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a full-rated transient event and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Can P4SMA180CAHM3/I be used in place of P4SMA180A?
No - P4SMA180CAHM3/I is bidirectional, while P4SMA180A is unidirectional. They differ in polarity marking (none vs. cathode band), leakage behavior under reverse bias, and circuit integration requirements. Substitution requires verification of signal path symmetry and may necessitate layout changes to accommodate missing polarity reference.
What is the thermal resistance of P4SMA180CAHM3/I, and how does it affect layout?
P4SMA180CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must adhere to this pad layout - reducing pad size increases thermal impedance and risks exceeding the 150 °C maximum junction temperature.
P4SMA180CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA180CAHM3/I FAQ
1.How can I place an order for P4SMA180CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA180CAHM3/I 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 P4SMA180CAHM3/I reliable?
The price and inventory of P4SMA180CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA180CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA180CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA180CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA180CAHM3/I?
P4SMA180CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA180CAHM3/I 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 P4SMA180CAHM3/I?
For technical support, including P4SMA180CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA180CAHM3/I requirements.
6.How does Aetrix verify that P4SMA180CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA180CAHM3/I 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 P4SMA180CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA180CAHM3/I?
All P4SMA180CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA180CAHM3/I, 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 P4SMA180CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA180CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA180CAHM3/I Tags
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