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Vishay General Semiconductor - Diodes Division P4SMA47CAHM3_A/I
- Part No.:
- P4SMA47CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAHM3_A/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,167
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Product details
Overview
P4SMA47CAHM3_A/I 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 P4SMA47CAHM3_A/I datasheet, P4SMA47CAHM3_A/I pinout, P4SMA47CAHM3_A/I application, or P4SMA47CAHM3_A/I equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, and bidirectional clamping with no polarity marking - critical for protecting bidirectional data buses, CAN transceivers, and analog sensor inputs against inductive switching transients.
Technical Context
The P4SMA47CAHM3_A/I operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold, it avalanches to divert surge current away from downstream circuitry while maintaining clamping voltage ≤64.8 V. Its glass-passivated junction ensures stable leakage (<1 µA at 40.2 V) and fast response time (<1 ns).
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it achieves 400 W peak pulse power handling (derated above TA = 25 °C) and supports repetitive surges at 0.01% duty cycle. Thermal resistance is RθJA = 120 °C/W, enabling operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 44.7–49.4 V at 1 mA - defines precise avalanche initiation point for reliable overvoltage triggering |
| Stand-off Voltage VWM | 40.2 V - maximum continuous reverse working voltage before leakage rises significantly |
| Clamping Voltage VC | 64.8 V at 6.2 A IPPM - limits voltage seen by protected IC during 10/1000 µs surge |
| Peak Pulse Power PPPM | 400 W (10/1000 µs) - sustains high-energy transients without failure under defined test conditions |
| Peak Pulse Current IPPM | 6.2 A - maximum non-repetitive surge current the device can safely clamp |
| Reverse Leakage ID | <1 µA at VWM - ensures minimal power loss and signal integrity in standby state |
| Operating Temperature | −65 to +150 °C - supports automotive under-hood and industrial ambient environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking (no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Connects to protected line; conducts surge current toward ground or rail during either polarity excursion |
| Cathode | Transient current sink (bidirectional) | Identical function to Anode; symmetric terminals enable bidirectional clamping without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and automotive production without hazardous substances |
| 400 W peak pulse power | Handles high-energy transients from inductive load switching (e.g., solenoid drivers, relay coils) |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow soldering processes without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial Analog Input Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and temperature/pressure sensor outputs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector interface to clamp transients before reaching transceiver or ADC input. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and analog front-ends during vehicle battery system disturbances. |
Use Scenario: Safeguarding 4–20 mA current loop receivers and ±10 V analog inputs in PLC modules against field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at terminal block entry to suppress fast-rising transients induced by nearby motor drives or lightning coupling. Use Value: Maintains signal fidelity and prevents false readings or controller resets in harsh factory environments with frequent EMI events. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
Use Scenario: Shielding USB 2.0 D+/D− lines in smart home hubs from ESD and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed adjacent to USB connector to absorb ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: Eliminates need for additional series impedance or RC filtering, preserving full-speed USB timing margins and eye diagram integrity. |
Use Scenario: Guarding RS-485/RS-232 transceivers in network gateways against induced surges on long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs to limit common-mode transients before they reach isolation barriers or level-shifting circuitry. Use Value: Enables compliance with ITU-T K.20/K.21 telecom surge immunity standards without degrading data rate or jitter performance. |
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 rating | Higher power handling suits longer-duration surges; larger footprint requires PCB layout change | Select when surge energy exceeds 400 W or thermal dissipation demands larger pad area |
| 1.5KE47CA | Through-hole DO-201 package; same VBR, 1500 W PPPM, higher VC (77 V) | Legacy board designs or prototyping where manual assembly or higher ruggedness is prioritized | Choose for cost-sensitive industrial controls where automated SMT is not available or higher clamping tolerance is acceptable |
Compared with SMBJ47CA and 1.5KE47CA, the P4SMA47CAHM3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and precise 64.8 V clamping - making it preferred for space-constrained automotive and industrial SMT assemblies requiring certified reliability.
Availability
P4SMA47CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog I/O protection, and telecom line interface circuits requiring stable component supply across multi-year production cycles.
Supply support for P4SMA47CAHM3_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, and protection devices with emphasis on reliability and application-specific optimization.
The P4SMA Series targets high-volume, high-reliability transient suppression in automotive, industrial, and communications systems - engineered for consistent clamping performance, low leakage, and compatibility with modern lead-free assembly processes.
FAQ
What is the breakdown voltage tolerance for P4SMA47CAHM3_A/I?
The P4SMA47CAHM3_A/I has a specified breakdown voltage (VBR) range of 44.7 V to 49.4 V at 1 mA test current, representing a ±5% tolerance around the nominal 47 V rating. This tight distribution ensures predictable clamping onset across production lots and supports design margining for worst-case transient scenarios in automotive and industrial applications.
Is P4SMA47CAHM3_A/I suitable for bidirectional signal lines like RS-485?
Yes, P4SMA47CAHM3_A/I is explicitly designed for bidirectional applications - indicated by the "CA" suffix - and provides symmetrical clamping in both polarities. Its low clamping voltage (64.8 V) and sub-1 ns response make it appropriate for protecting RS-485 transceivers against ESD and fast transients without distorting differential signaling integrity.
Does P4SMA47CAHM3_A/I require a heatsink for standard operation?
No, P4SMA47CAHM3_A/I is rated for 400 W peak pulse power with no heatsink when mounted on 0.2" × 0.2" copper pads per Vishay's test condition. Its RθJA of 120 °C/W allows safe operation within its −65 °C to +150 °C junction temperature range under typical surge duty cycles (0.01%), eliminating need for external thermal management in most applications.
How does the HM3 suffix affect P4SMA47CAHM3_A/I compliance?
"HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Unlike base "E3" variants, P4SMA47CAHM3_A/I meets automotive reliability standards including temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (HBM ≥8 kV), making it approved for use in safety-critical vehicle subsystems such as ADAS sensors and body control modules.
What is the maximum reverse leakage current for P4SMA47CAHM3_A/I at rated VWM?
At its stand-off voltage of 40.2 V, the P4SMA47CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 1 µA at 25 °C. This ultra-low leakage preserves signal accuracy in high-impedance analog paths and minimizes standby power loss in always-on automotive modules - confirmed per Vishay's Electrical Characteristics table on page 2 of document 88367.
P4SMA47CAHM3_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:
- 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)
P4SMA47CAHM3_A/I FAQ
1.How can I place an order for P4SMA47CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAHM3_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 P4SMA47CAHM3_A/I reliable?
The price and inventory of P4SMA47CAHM3_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 P4SMA47CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA47CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAHM3_A/I?
P4SMA47CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAHM3_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 P4SMA47CAHM3_A/I?
For technical support, including P4SMA47CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA47CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAHM3_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 P4SMA47CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA47CAHM3_A/I?
All P4SMA47CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAHM3_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 P4SMA47CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA47CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47CAHM3_A/I Tags
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