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Vishay General Semiconductor - Diodes Division P4SMA47CAHE3_A/H
- Part No.:
- P4SMA47CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAHE3_A/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,200
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Product details
Overview
P4SMA47CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 47 V breakdown voltage (VBR = 44.7–49.4 V at 1 mA), 64.8 V maximum clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power (10/1000 µs waveform). It provides robust ESD and surge protection for signal lines in automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA47CAHE3_A/H datasheet, P4SMA47CAHE3_A/H pinout, P4SMA47CAHE3_A/H application, or P4SMA47CAHE3_A/H equivalent, key selection considerations include its AEC-Q101 qualification, bidirectional polarity, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector: when transient voltage exceeds its standoff voltage (VWM = 40.2 V), it avalanches rapidly to limit downstream voltage to ≤64.8 V. Its bidirectional structure enables symmetric suppression of positive and negative transients without external polarity management.
Designed for high-reliability automotive applications, P4SMA47CAHE3_A/H meets AEC-Q101 stress testing requirements and features glass-passivated junctions, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 moisture sensitivity rating (peak reflow 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines precise avalanche onset threshold for bidirectional clamping |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 64.8 V at 6.2 A - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 400 W - peak transient power handling capability under standardized surge waveform |
| IFSM | Not applicable - bidirectional device has no forward surge rating (unidirectional only) |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, informs derating above 25 °C ambient |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative transients; symmetrical with cathode in bidirectional operation |
| Cathode | Transient current entry (positive half-cycle) | Accepts reverse surge current during positive transients; no band marking per bidirectional specification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in load-dump and inductive switching events |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage margin between clamp level and protected IC's absolute maximum rating |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning |
| Glass passivated junction | Ensures stable leakage performance and long-term stability under thermal and humidity stress |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from ISO 7637-2 pulse 1/2a/5a transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs by limiting transient voltage to ≤64.8 V with sub-nanosecond response. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor across input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal integrity during 1 kV/500 A surge events while supporting continuous operation up to 150 °C ambient. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control Board |
Use Scenario: Protecting Ethernet PHYs and PoE injectors against lightning-induced surges on RJ45 ports in enterprise switches and base stations. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after gas discharge tube (GDT) primary protection to handle residual fast-rising transients. Use Value: Clamps residual overshoot to safe levels (<65 V) within 1 ns, preserving Ethernet compliance and link stability. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers from commutation spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor driver ICs and optocouplers to absorb inductive kickback. Use Value: Enables reliable operation without reset faults or MCU brownouts during repeated motor start/stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Same VBR range (44.7–49.4 V), but SMB package (DO-214AA); 600 W PPPM, higher thermal mass | Higher power handling suits higher-energy surges; larger footprint requires PCB layout change | Select when surge energy exceeds 400 W or board space allows larger package |
| 1.5KE47CA | Through-hole TO-218 package; same VBR, 1500 W PPPM | Designed for legacy through-hole assembly; not suitable for automated SMT lines | Choose only for repair, prototyping, or non-SMT production environments |
Compared with SMBJ47CA and 1.5KE47CA, P4SMA47CAHE3_A/H offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capability-making it the preferred choice for new automotive and industrial SMT designs where space, reliability, and process compatibility are critical.
Availability
P4SMA47CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, AEC-Q101 compliance, and RoHS-conformant sourcing.
Supply support for P4SMA47CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-speed transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping voltage, and SMT manufacturability are mandatory.
FAQ
What does the "CA" suffix mean in P4SMA47CAHE3_A/H?
The "CA" suffix in P4SMA47CAHE3_A/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA47A), P4SMA47CAHE3_A/H has no polarity marking and functions identically in either direction-critical for AC-coupled or differential signal lines where transient polarity is unpredictable.
Is P4SMA47CAHE3_A/H qualified for automotive use?
Yes, P4SMA47CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision notes. This qualification covers stress tests including temperature cycling, high-temperature operating life, and electrostatic discharge-ensuring suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and vibration stress is essential.
What is the maximum clamping voltage of P4SMA47CAHE3_A/H and how is it measured?
The maximum clamping voltage of P4SMA47CAHE3_A/H is 64.8 V, measured at a peak pulse current (IPPM) of 6.2 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the highest voltage that appears across the device terminals during a defined transient event-and thus the upper bound of protection provided to downstream circuitry.
Can P4SMA47CAHE3_A/H replace a unidirectional TVS like P4SMA47A in an existing design?
No-P4SMA47CAHE3_A/H cannot directly replace P4SMA47A without circuit review. While both share identical VBR and VC ratings, P4SMA47A is unidirectional (cathode-marked) and conducts forward current, whereas P4SMA47CAHE3_A/H is bidirectional and blocks in both directions until breakdown. Substitution may cause unintended conduction or failure to protect if polarity-dependent circuit paths exist.
What is the thermal resistance and how does it affect P4SMA47CAHE3_A/H's power derating?
P4SMA47CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W. This means each watt of sustained power dissipation raises the junction temperature by 120 °C above ambient. For reliable operation above 25 °C ambient, power must be derated per Vishay's Fig. 2-e.g., at 85 °C ambient, maximum continuous power drops to ~1.8 W to maintain TJ ≤ 150 °C.
P4SMA47CAHE3_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):
- 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/H FAQ
1.How can I place an order for P4SMA47CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAHE3_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 P4SMA47CAHE3_A/H reliable?
The price and inventory of P4SMA47CAHE3_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 P4SMA47CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA47CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAHE3_A/H?
P4SMA47CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAHE3_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 P4SMA47CAHE3_A/H?
For technical support, including P4SMA47CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA47CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAHE3_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 P4SMA47CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA47CAHE3_A/H?
All P4SMA47CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAHE3_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 P4SMA47CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA47CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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