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Vishay General Semiconductor - Diodes Division P4SMA43CAHM3_A/I
- Part No.:
- P4SMA43CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAHM3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
P4SMA43CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 43 V standoff voltage (VWM), 47.9–52.5 V breakdown voltage (VBR) at 1 mA, 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial systems.
For engineers reviewing the P4SMA43CAHM3_A/I datasheet, P4SMA43CAHM3_A/I pinout, P4SMA43CAHM3_A/I application, or P4SMA43CAHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMA (DO-214AC) package details, clamping performance under surge conditions, and direct alternative part comparisons for ESD and lightning transient protection design.
Technical Context
The P4SMA43CAHM3_A/I operates as a bidirectional TVS diode, symmetrically clamping positive and negative transients without polarity dependence. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping across -65 °C to +150 °C operating junction temperature.
Rated for 400 W peak pulse power (10/1000 µs), it delivers 59.3 V clamping at 6.7 A IPPM while maintaining ≤1.0 µA reverse leakage at 36.8 V (VWM). It meets MSL Level 1 per J-STD-020 and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirming suitability for automotive ECUs and harsh-environment industrial controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36.8 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - precise voltage range where avalanche conduction initiates; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 59.3 V at 6.7 A IPPM - maximum voltage seen by protected circuit during 10/1000 µs surge; critical for IC-level overvoltage margining |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capability under standardized 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity |
| PD (Power Dissipation) | 3.3 W - steady-state thermal limit on infinite heatsink at 50 °C; determines derating for PCB copper area and ambient conditions |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-temperature industrial enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; suffix HM3 denotes halogen-free AEC-Q101 grade |
Pinout & Package
Package: SMA (DO-214AC) - surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability standards. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Common terminal for symmetrical clamping; connects to protected line or ground reference depending on layout |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms dual-junction structure enabling equal clamping in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns |
| 400 W peak pulse power (10/1000 µs) | Supports robust IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly laid-out PCBs with 5.0 mm × 5.0 mm copper pads |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability and extended temperature cycling |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream ICs - e.g., keeps 3.3 V or 5 V logic inputs within safe absolute maximum ratings during transients |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without moisture sensitivity handling or baking requirements |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Data Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient spikes on sensor supply and signal outputs to prevent latch-up or gate oxide damage in connected microcontrollers. Use Value: Maintains signal integrity under 100 V/10 ms load dump events while adding <0.5 pF capacitance - no data rate degradation on 10 kHz analog outputs. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs against EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Fast-response shunt device limiting common-mode and differential-mode transients across A/B bus lines before they reach the transceiver's input stage. Use Value: Clamps 4 kV contact discharge (IEC 61000-4-2) to <60 V within <1 ns, preserving bus timing margins and preventing false logic transitions. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+ and D− lines in set-top boxes and smart displays, downstream of integrated port protection. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp absorbing ±15 kV air discharge (IEC 61000-4-2) without distorting 480 Mbps data eye. Use Value: Adds only 0.8 pF typical junction capacitance at 0 V, ensuring <1% signal rise-time degradation on full-speed USB links. |
Use Scenario: Primary surge protection on DSL line interface circuits in residential gateways subjected to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: High-energy front-end suppressor diverting >100 A surges (10/1000 µs) away from sensitive ADSL/VDLS transceivers and isolation transformers. Use Value: Handles 400 W peak pulse power with 59.3 V clamping - limits transformer primary voltage to safe levels and prevents core saturation during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VWM (36.8 V), VC (59.3 V), but 600 W PPPM rating and SMB (DO-214AA) package - 30% larger footprint, higher thermal mass | Better suited for higher-energy surges (>400 W) or designs with limited airflow; not drop-in due to different pad layout and height | Select when surge energy exceeds 400 W or when board space allows larger package for improved thermal margin |
| 1.5KE43CA | Same electrical specs but through-hole DO-15 package; 1500 W PPPM rating, higher junction-to-ambient thermal resistance (RθJA = 15 °C/W vs. 120 °C/W) | Used in legacy industrial power supplies and telecom line cards where wave soldering is preferred and PCB real estate is less constrained | Choose for through-hole manufacturing, higher single-pulse energy handling, or cost-sensitive non-automotive applications |
Compared with SMBJ43CA and 1.5KE43CA, the P4SMA43CAHM3_A/I offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capability - making it the preferred choice for space-constrained automotive and modern industrial SMT designs requiring certified reliability.
Availability
P4SMA43CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial RS-485 networks, and consumer USB interface designs requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for P4SMA43CAHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series was developed for high-reliability transient suppression in automotive, industrial, and communications equipment - delivering standardized 400 W surge capability, AEC-Q101 qualification, and consistent clamping performance in compact surface-mount packages.
FAQ
What is the clamping voltage of P4SMA43CAHM3_A/I at its rated peak pulse current?
The P4SMA43CAHM3_A/I has a maximum clamping voltage (VC) of 59.3 V at 6.7 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The P4SMA43CAHM3_A/I maintains this clamping performance across its full operating temperature range.
Is P4SMA43CAHM3_A/I suitable for automotive applications?
Yes, the P4SMA43CAHM3_A/I is AEC-Q101 qualified (denoted by the HM3 suffix), halogen-free, and RoHS-compliant - meeting stress test requirements for automotive electronics including high-temperature operating life, temperature cycling, and ESD robustness. It is specifically intended for use in engine control units, body electronics, and ADAS modules where transient immunity and long-term reliability are mandatory. The P4SMA43CAHM3_A/I is rated for junction temperatures up to +150 °C.
What does the "CA" suffix indicate in P4SMA43CAHM3_A/I?
The "CA" suffix in P4SMA43CAHM3_A/I designates a bidirectional Transient Voltage Suppressor - meaning it provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. Unlike unidirectional "A" variants, CA devices have no cathode band marking and are used on AC-coupled lines, differential buses (e.g., RS-485, CAN), or any application requiring equal protection in both voltage polarities. This functionality is intrinsic to the P4SMA43CAHM3_A/I's internal dual-junction structure.
What package type is used for P4SMA43CAHM3_A/I, and what are its key mechanical properties?
The P4SMA43CAHM3_A/I uses the SMA (DO-214AC) surface-mount package: low-profile, molded plastic case with matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 whisker testing. Its dimensions are 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), and it meets UL 94 V-0 flammability rating. The package supports MSL Level 1 handling with 260 °C peak reflow - no baking required prior to SMT assembly. This compact form factor is integral to the P4SMA43CAHM3_A/I's suitability for dense automotive and industrial PCB layouts.
How does the thermal performance of P4SMA43CAHM3_A/I affect PCB layout decisions?
The P4SMA43CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under 3.3 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - especially in sealed enclosures or high-ambient environments. Derating curves in Figure 2 of document 88367 show that above 25 °C ambient, power handling decreases linearly; thus, the P4SMA43CAHM3_A/I's thermal behavior directly dictates pad size, layer stack-up, and proximity to heat sources.
P4SMA43CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4SMA43CAHM3_A/I FAQ
1.How can I place an order for P4SMA43CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAHM3_A/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 P4SMA43CAHM3_A/I reliable?
The price and inventory of P4SMA43CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA43CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAHM3_A/I?
P4SMA43CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAHM3_A/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 P4SMA43CAHM3_A/I?
For technical support, including P4SMA43CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA43CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAHM3_A/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 P4SMA43CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA43CAHM3_A/I?
All P4SMA43CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAHM3_A/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 P4SMA43CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA43CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43CAHM3_A/I Tags
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