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Vishay General Semiconductor - Diodes Division P4SMA180CAHM3_A/H
- Part No.:
- P4SMA180CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA180CAHM3_A/H.pdf
- Description:
- TVS DIODE 154VWM 246VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,703
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Product details
Overview
P4SMA180CAHM3_A/H 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 and 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 (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and telecom line drivers against ESD and inductive switching surges.
For engineers reviewing the P4SMA180CAHM3_A/H datasheet, P4SMA180CAHM3_A/H pinout, P4SMA180CAHM3_A/H application, or P4SMA180CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns) to sub-microsecond transients.
The P4SMA180CAHM3_A/H delivers 400 W peak pulse power at TA = 25 °C (derated above 25 °C per Fig. 2), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power handling. It meets MSL Level 1 per J-STD-020 and supports peak forward surge current up to 40 A (8.3 ms half-sine) in unidirectional mode - though not applicable here due to bidirectional configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 180 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 170–190 V nominal systems. |
| VBR (Breakdown Voltage) | 207 V min / 234 V max at IT = 1 mA - specifies guaranteed avalanche onset range under standardized test conditions. |
| VC (Clamping Voltage) | 246 V at IPPM = 1.2 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case transient; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capacity for single 10/1000 µs transients; derates linearly above 25 °C ambient per Fig. 2. |
| ID (Reverse Leakage) | 1 µA max at VWM = 180 V - negligible standby current that avoids loading sensitive bias networks or high-impedance inputs. |
| TJ max | 150 °C - maximum junction temperature defining operational and reliability limits; requires thermal design to maintain below this threshold. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | One of two symmetrical terminals; conducts avalanche current when voltage exceeds VBR in either polarity. |
| Cathode | Transient current exit point (either direction) | Second symmetrical terminal; functionally identical to Anode in bidirectional operation - no fixed polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity concerns - e.g., RS-485, CAN FD, or Ethernet PHY interfaces. |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V–48 V industrial buses when properly mounted on 5 mm × 5 mm copper pads. |
| AEC-Q101 qualified & halogen-free | Meets automotive electronics reliability requirements and environmental compliance (RoHS + JESD201 Class 2 whisker resistance) for under-hood and ADAS modules. |
| Low profile SMA package | 0.208" length × 0.157" width × 0.090" height enables dense layout in space-constrained applications like automotive ECUs and telecom line cards. |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on and VC/VBR ≈ 1.19 ensure minimal overvoltage exposure to protected ICs such as microcontrollers or analog front-ends. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN sensor nodes (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle chassis wiring. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or supply rail to clamp transients before reaching ASIC or MCU input pins. Use Value: Withstands 400 W surges while limiting clamped voltage to 246 V - preserving integrity of 3.3 V/5 V logic interfaces coupled via level shifters or isolated drivers. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Placed line-to-line and line-to-ground on twisted-pair bus to suppress common-mode and differential-mode transients. Use Value: Symmetrical clamping ensures equal protection for A/B bus lines; 1 µA leakage avoids signal distortion on high-impedance termination networks. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Front-end protection for xDSL or GPON line interface units subjected to lightning-induced surges on copper pairs. IC Role / Device Role / Timing Role: First-stage TVS in multi-stage protection scheme, shunting bulk energy before MOV or GDT secondary stages. Use Value: 246 V clamping voltage allows coordination with 230 VAC-derived DC rails and prevents premature triggering of downstream crowbar circuits. |
Use Scenario: Secondary-side transient suppression on 12–24 V DC outputs of wall adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Bidirectional clamp across output rails to absorb ESD events from hot-plug connectors or cable coupling. Use Value: Halogen-free, AEC-Q101-qualified construction supports global regulatory compliance and long-term field reliability in consumer environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180CA | Same VWM (180 V), higher PPPM (600 W), larger SMB (DO-214AA) package (4.58 mm × 3.94 mm × 2.29 mm). | Requires larger PCB footprint; better suited for higher-energy surges where board space permits. | Select when system-level surge tests exceed IEC 61000-4-5 Level 4 and thermal budget allows larger package. |
| 1.5SMC180CA | Same VWM (180 V), same PPPM (400 W), but SMC (DO-214AB) package (7.11 mm × 6.22 mm × 2.34 mm) - 2.5× larger footprint than SMA. | Higher thermal mass improves repetitive surge handling but incompatible with fine-pitch SMT lines. | Choose only if legacy board design uses SMC or if junction temperature rise must be minimized under sustained transient duty cycles. |
Compared with SMBJ180CA and 1.5SMC180CA, the P4SMA180CAHM3_A/H offers optimal balance of compact size, automotive qualification, and 400 W surge capability - making it preferred for new designs targeting space-constrained, AEC-Q101-compliant applications without needing >400 W rating.
Availability
P4SMA180CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA180CAHM3_A/H 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing AEC-Q101 qualification, low-profile packaging, and precise clamping control across wide voltage ranges.
FAQ
What does the "CA" suffix indicate in P4SMA180CAHM3_A/H?
The "CA" suffix in P4SMA180CAHM3_A/H denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P4SMA180A), this device provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses, or floating power rails without polarity constraints. The P4SMA180CAHM3_A/H maintains identical electrical specs in either direction, including VWM = 180 V and VC = 246 V.
Is P4SMA180CAHM3_A/H qualified for automotive applications?
Yes, P4SMA180CAHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HM3" = halogen-free, RoHS-compliant, and AEC-Q101 qualified) and documentation (Rev. 09-Jan-2024, Doc. #88367). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD - validating its suitability for under-hood, body control, and ADAS modules where reliability under harsh conditions is mandatory.
What is the maximum clamping voltage of P4SMA180CAHM3_A/H and at what current is it specified?
The maximum clamping voltage (VC) of P4SMA180CAHM3_A/H is 246 V, measured at a peak pulse current (IPPM) of 1.2 A using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage imposed on the protected circuit during a transient event and is critical for ensuring downstream components (e.g., RS-485 transceivers or MCU I/O pins) remain within their absolute maximum ratings.
Does P4SMA180CAHM3_A/H have polarity markings on the package?
No, P4SMA180CAHM3_A/H has no polarity markings because it is a bidirectional TVS diode. The SMA (DO-214AC) package lacks a cathode band or other orientation indicators - both terminals are functionally identical. This simplifies PCB layout and eliminates risk of incorrect orientation during automated assembly, unlike unidirectional variants which require strict anode/cathode alignment.
What is the thermal resistance and recommended pad layout for P4SMA180CAHM3_A/H?
P4SMA180CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W peak pulse power. Smaller pads increase thermal impedance and reduce surge capability - verified in Fig. 1 and Fig. 2 of the datasheet (Doc. #88367).
P4SMA180CAHM3_A/H 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:
- Active
- 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_A/H FAQ
1.How can I place an order for P4SMA180CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA180CAHM3_A/H 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_A/H reliable?
The price and inventory of P4SMA180CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA180CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA180CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA180CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA180CAHM3_A/H?
P4SMA180CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA180CAHM3_A/H 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_A/H?
For technical support, including P4SMA180CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA180CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA180CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA180CAHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA180CAHM3_A/H?
All P4SMA180CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA180CAHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for P4SMA180CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA180CAHM3_A/H Tags
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