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Vishay General Semiconductor - Diodes Division P4SMA180AHM3/I
- Part No.:
- P4SMA180AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA180AHM3/I.pdf
- Description:
- TVS DIODE 154VWM 246VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,908
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Product details
Overview
P4SMA180AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 180 V standoff voltage (VWM), 246 V clamping voltage (VC) at 1.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform). It provides robust overvoltage protection for automotive-grade power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the P4SMA180AHM3/I datasheet, P4SMA180AHM3/I pinout, P4SMA180AHM3/I application, or P4SMA180AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance, 150 °C maximum junction temperature, and verified clamping performance under repetitive 0.01% duty-cycle transients.
Technical Context
This device operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to suppress transient energy before downstream ICs are damaged. Its breakdown voltage (VBR) is specified at 171–189 V (min/max) with 1.0 mA test current, ensuring precise voltage thresholding.
The P4SMA180AHM3/I is thermally optimized for surface-mount PCB layouts using 0.2" × 0.2" copper pads per terminal, achieving 30 °C/W junction-to-lead thermal resistance. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak, enabling compatibility with standard automated assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 154 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 171–189 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 246 V at IPPM = 1.2 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity for single 10/1000 µs transient; derates to 300 W above 91 V per spec. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - Low-profile SMD outline with cathode band marking; compatible with JEDEC-standard pick-and-place. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD. |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and cathode band marking on unidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail or CAN bus); band denotes this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables suppression of high-energy load-dump transients common in 24 V automotive systems without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated reliability for automotive powertrain and body control modules requiring zero-failure field performance. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and eliminates corrosive halogen emissions during board reflow or end-of-life incineration. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving system-level EMI immunity. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow; eliminates baking requirement and reduces manufacturing overhead. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Limits transient voltage to ≤246 V, preventing damage to 36 V-rated input capacitors and LDO regulators. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor PCB output connector, grounded via shortest path. Use Value: Sub-1 ns response clamps 8 kV contact ESD (IEC 61000-4-2) to <30 V, preserving ADC accuracy and signal integrity. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary TVS on input bulk capacitor node, coordinated with upstream GDT. Use Value: 400 W rating absorbs multiple 10/1000 µs surges per IEC 61000-4-5 Level 3, extending system MTBF. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart washing machines during commutation. IC Role / Device Role / Timing Role: Flyback TVS across motor terminals, referenced to chassis ground. Use Value: Clamps 100 V inductive spikes to 246 V within 1 ns, preventing MOSFET avalanche failure and gate driver latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ180A | Same VWM (154 V), VC = 246 V, but rated 400 W only up to 170 V; no AEC-Q101 qualification. | Commercial-grade only; unsuitable for automotive OEM designs requiring qualification evidence. | Select P4SMA180AHM3/I when AEC-Q101 traceability and halogen-free compliance are mandatory. |
| 1.5SMC180A | Higher package thermal mass (DO-214AB), RθJA = 100 °C/W vs. 120 °C/W; same electrical specs but larger footprint. | Requires PCB layout revision due to 2.5 mm wider body; not drop-in compatible with SMA land pattern. | Choose P4SMA180AHM3/I for space-constrained automotive modules where DO-214AC footprint is fixed. |
Compared with SMAJ180A and 1.5SMC180A, the P4SMA180AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and strict DO-214AC dimensional compliance-making it the only option meeting Tier-1 automotive BOM requirements without layout or qualification trade-offs.
Availability
P4SMA180AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power interfaces, and consumer appliance motor drives requiring stable component supply across extended production lifecycles.
Supply support for P4SMA180AHM3/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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The P4SMA Series targets cost-sensitive yet reliability-critical transient protection needs, with design focus on AEC-Q101-compliant TVS diodes for 12 V/24 V vehicle subsystems and ruggedized industrial controls.
FAQ
What is the clamping voltage of the P4SMA180AHM3/I at its rated peak pulse current?
The P4SMA180AHM3/I has a maximum clamping voltage (VC) of 246 V at 1.2 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA180AHM3/I maintains this clamping performance while sustaining its 400 W peak pulse rating.
Is the P4SMA180AHM3/I suitable for automotive applications?
Yes, the P4SMA180AHM3/I is AEC-Q101 qualified and specifically designed for automotive use, with validation across temperature cycling, high-temperature reverse bias (HTRB), and ESD stress tests. Its HM3 suffix denotes halogen-free, RoHS-compliant construction and automotive-grade reliability. The P4SMA180AHM3/I is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces where load-dump and ESD immunity are critical.
What does the "HM3" suffix indicate in P4SMA180AHM3/I?
The "HM3" suffix in P4SMA180AHM3/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" denotes automotive qualification, "M" indicates halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes it from commercial-grade variants (e.g., E3 or M3) and ensures compliance with Tier-1 automotive material declarations and environmental standards. The P4SMA180AHM3/I meets JESD201 Class 2 whisker resistance requirements.
How does the P4SMA180AHM3/I compare to bidirectional TVS diodes in the same series?
The P4SMA180AHM3/I is unidirectional, meaning it conducts only in reverse bias to clamp positive transients on a referenced line (e.g., 24 V rail to ground). Bidirectional variants like P4SMA180CA offer symmetrical clamping for AC-coupled or floating lines but have lower VWM (max 185 V) and reduced PPPM above 91 V. The P4SMA180AHM3/I delivers higher effective standoff for DC systems and avoids leakage current in forward bias, making it optimal for power rail protection where polarity is fixed.
What is the thermal resistance of the P4SMA180AHM3/I under standard mounting conditions?
The P4SMA180AHM3/I exhibits 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, and a junction-to-lead resistance (RθJL) of 30 °C/W. These values enable reliable operation at 150 °C maximum junction temperature even under sustained 3.3 W power dissipation. The P4SMA180AHM3/I's thermal performance is validated per JEDEC JESD51 standards and supports high-density PCB layouts without forced cooling.
P4SMA180AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA180AHM3/I FAQ
1.How can I place an order for P4SMA180AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA180AHM3/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 P4SMA180AHM3/I reliable?
The price and inventory of P4SMA180AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA180AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA180AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA180AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA180AHM3/I?
P4SMA180AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA180AHM3/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 P4SMA180AHM3/I?
For technical support, including P4SMA180AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA180AHM3/I requirements.
6.How does Aetrix verify that P4SMA180AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA180AHM3/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 P4SMA180AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA180AHM3/I?
All P4SMA180AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA180AHM3/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 P4SMA180AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA180AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA180AHM3/I Tags
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