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Vishay General Semiconductor - Diodes Division P4SMA47CAHE3_A/I
- Part No.:
- P4SMA47CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAHE3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
P4SMA47CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 64.8 V maximum clamping voltage (VC) at 6.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform). It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the P4SMA47CAHE3_A/I datasheet, P4SMA47CAHE3_A/I pinout, P4SMA47CAHE3_A/I application, or P4SMA47CAHE3_A/I equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, and bidirectional clamping symmetry-critical for robust protection of bidirectional data buses, CAN transceivers, and analog sensor inputs without polarity constraints.
Technical Context
This bidirectional TVS operates with symmetrical reverse/forward clamping behavior across both terminals, enabling use on AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM = 40.2 V) and fast response time (<1.0 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device exhibits a temperature coefficient of VBR of +0.101 %/°C and thermal resistance of RθJA = 120 °C/W, making it suitable for ambient temperatures from –65 °C to +150 °C. Derating above 25 °C follows a defined curve (Fig. 2), and its 3.3 W steady-state power dissipation supports continuous operation under moderate leakage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 40.2 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 64.8 V at 6.2 A (10/1000 µs) - clamping voltage limiting downstream IC stress during surge |
| PPPM | 400 W - peak transient energy absorption capability per single pulse |
| Junction Temp. Range | –65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated placement and IPC-7351 standard pads |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Bidirectional construction means no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient current; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or differential lines (e.g., RS-485, CAN, LVDS) without polarity routing constraints |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V systems when properly laid out |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility without dry-pack handling |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting 5 V or 12 V analog sensor outputs (e.g., pressure, temperature) in engine bay or chassis modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, absorbing transients before they reach ADC input or op-amp buffer. Use Value: Prevents latch-up or permanent damage to microcontroller analog front-end while maintaining signal integrity below 40.2 V DC operating range. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) on factory floor networks exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Placed across A/B differential pair and ground to clamp common-mode surges without distorting data eye. Use Value: Maintains >1 Mbps data integrity under repetitive 1 kV/500 A transients due to low dynamic impedance and symmetric clamping. |
| Consumer USB Port ESD | Telecom Power Rail Clamp |
Use Scenario: ESD protection for USB 2.0 D+/D− lines in set-top boxes or smart displays subjected to ±8 kV contact discharge (IEC 61000-4-2). IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at VR = 0 V) placed directly at connector to shunt ESD before reaching PHY IC. Use Value: Clamps sub-1 ns ESD events to <65 V within 1 ns, preventing PHY latch-up while adding <0.5 pF parasitic capacitance to signal path. |
Use Scenario: Secondary overvoltage clamp on 48 V telecom power distribution board after primary DC-DC converter, guarding against backfeed or hot-swap transients. IC Role / Device Role / Timing Role: Connected between rail and ground to limit voltage excursions beyond 64.8 V during 10/1000 µs surges. Use Value: Absorbs up to 400 W transient energy without failure, preserving downstream PMICs and FPGAs during field-replaceable module insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Higher package thermal mass (SMB/DO-214AA); RθJA = 70 °C/W vs. 120 °C/W; same VBR, VC, and PPPM | Better steady-state power handling (5.0 W vs. 3.3 W); suited for high-duty-cycle surge environments | Select SMBJ47CA when board layout allows larger pad area and thermal relief is needed for repeated surges |
| 1.5KE47CA | Through-hole DO-15 package; 1500 W PPPM; VC = 77.0 V at 19.5 A; higher clamping ratio | Designed for legacy PCBs and high-energy lightning protection; not SMT-compatible | Choose 1.5KE47CA only for through-hole designs requiring >1 kW surge margin and where rework tolerance is prioritized over density |
Compared with SMBJ47CA and 1.5KE47CA, the P4SMA47CAHE3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 compliance, and precise 40.2 V standoff-making it preferred for space-constrained automotive and industrial SMT assemblies where MSL-1 reflow and bidirectional symmetry are mandatory.
Availability
P4SMA47CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ports, and telecom power rail protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant sourcing.
Supply support for P4SMA47CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets high-volume, cost-sensitive surge protection applications demanding AEC-Q101 qualification, low-profile SMT packaging, and consistent bidirectional clamping performance across automotive, industrial, and communications markets.
FAQ
What does the "CA" suffix indicate in P4SMA47CAHE3_A/I?
The "CA" suffix in P4SMA47CAHE3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities-ideal for protecting AC-coupled or differential signal lines without regard to terminal orientation. This differs from unidirectional variants (e.g., P4SMA47A) that require correct anode/cathode placement relative to circuit ground.
Is P4SMA47CAHE3_A/I suitable for IEC 61000-4-5 surge testing?
Yes, P4SMA47CAHE3_A/I is rated for 400 W peak pulse power with a 10/1000 µs waveform, enabling it to meet IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) on 24 V systems when mounted per recommended 0.2" × 0.2" copper pads. Its 64.8 V clamping voltage ensures protected ICs remain within safe operating limits during standardized surge events.
How does the HE3 suffix affect the P4SMA47CAHE3_A/I specification?
The "HE3" suffix in P4SMA47CAHE3_A/I indicates RoHS-compliant construction and AEC-Q101 qualification-certifying the device for automotive applications including temperature cycling, humidity testing, and high-temperature reverse bias life validation. It also confirms matte tin plating compliant with J-STD-002 and JESD 22-B102 solderability standards.
What is the maximum steady-state power dissipation for P4SMA47CAHE3_A/I?
The maximum steady-state power dissipation (PD) for P4SMA47CAHE3_A/I is 3.3 W at TA = 50 °C on an infinite heatsink. In typical PCB layouts with 0.2" × 0.2" copper pads per terminal, derating applies above 25 °C per Figure 2 in the datasheet, reducing usable power to ~2.2 W at 85 °C ambient.
Does P4SMA47CAHE3_A/I have polarity markings on the package?
No, P4SMA47CAHE3_A/I has no polarity markings because it is a bidirectional TVS diode-the anode and cathode terminals are functionally identical and interchangeable. Unlike unidirectional variants (e.g., P4SMA47A), which feature a cathode band, the CA version omits marking to reflect its symmetrical clamping behavior in either direction.
P4SMA47CAHE3_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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA47CAHE3_A/I FAQ
1.How can I place an order for P4SMA47CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAHE3_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 P4SMA47CAHE3_A/I reliable?
The price and inventory of P4SMA47CAHE3_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 P4SMA47CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA47CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAHE3_A/I?
P4SMA47CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAHE3_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 P4SMA47CAHE3_A/I?
For technical support, including P4SMA47CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA47CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAHE3_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 P4SMA47CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA47CAHE3_A/I?
All P4SMA47CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAHE3_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 P4SMA47CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA47CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47CAHE3_A/I Tags
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