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Vishay General Semiconductor - Diodes Division P4SMA47CAHM3/I
- Part No.:
- P4SMA47CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAHM3/I.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,483
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Product details
Overview
P4SMA47CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 400 W peak pulse power (10/1000 µs), 64.8 V maximum clamping voltage (VC) at IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the P4SMA47CAHM3/I datasheet, P4SMA47CAHM3/I pinout, P4SMA47CAHM3/I application, or P4SMA47CAHM3/I equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1.0 µA at VWM = 40.2 V), and halogen-free RoHS compliance are required.
Technical Context
The P4SMA47CAHM3/I operates as a symmetrical, bidirectional avalanche diode with identical forward and reverse breakdown characteristics. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.101 %/°C), enabling predictable clamping across -65 °C to +150 °C operating range.
It delivers 400 W peak pulse power under 10/1000 µs waveform when mounted on 5.0 mm × 5.0 mm copper pads, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. The device meets MSL Level 1 (260 °C reflow peak) and supports automated SMT placement without derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 44.7–49.4 V at 1.0 mA test current - defines precise clamping onset threshold for overvoltage events |
| Stand-off Voltage VWM | 40.2 V - maximum continuous working voltage before significant leakage begins |
| Clamping Voltage VC | 64.8 V at IPPM = 6.2 A - actual voltage seen by protected circuit during 400 W transient |
| Peak Pulse Power PPPM | 400 W (10/1000 µs) - sustains high-energy surges without failure when properly mounted |
| Reverse Leakage ID | <1.0 µA at VWM - negligible standby current, critical for low-power sensor and battery-backed systems |
| Operating Temperature | -65 °C to +150 °C - supports under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements for green manufacturing and end-of-life handling |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance without degradation |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak without preconditioning |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing transients before they reach precision ADC or MCU input pins. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs while maintaining <1 µA leakage at 40.2 V working voltage. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-induced surges and ESD. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Clamps 400 W transients to ≤64.8 V within nanoseconds, preserving signal integrity and enabling >100,000 surge cycles per device lifetime. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Guarding 48 V DC power feeds in PoE-powered equipment (e.g., IP cameras, access points) against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary MOV or GDT, providing fast, low-clamp protection for DC-DC converter inputs. Use Value: Limits voltage overshoot to 64.8 V during 10/1000 µs surges, preventing overvoltage shutdown or MOSFET gate oxide rupture in buck regulators. |
Use Scenario: Protecting USB 2.0 data lines (D+/D−) and VBUS against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector, shunting ESD current away from USB transceiver PHY. Use Value: Sub-1 ns response time and 64.8 V clamping ensure <100 ns overvoltage exposure - well below USB 2.0 eye diagram timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Higher 600 W peak power, larger SMB (DO-214AA) package (5.28 mm × 4.57 mm vs. SMA's 5.28 mm × 4.50 mm) | Better suited for higher-energy surges; requires PCB layout change due to wider body and different pad spacing | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when thermal margin is constrained |
| 1.5KE47CA | Through-hole TO-218 package, 1500 W peak power, higher VC = 77 V, slower response due to higher junction capacitance | Used in legacy power supply designs; not suitable for high-speed signal lines or automated SMT assembly | Choose only for cost-sensitive, non-automated production or where board space allows through-hole mounting |
Compared with SMBJ47CA and 1.5KE47CA, the P4SMA47CAHM3/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W capability-making it preferred for space-constrained automotive and industrial SMT designs requiring verified automotive reliability without sacrificing surge margin.
Availability
P4SMA47CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom power rail protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA47CAHM3/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 performance.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems-delivering consistent clamping behavior, AEC-Q101 qualification, and optimized SMT manufacturability in the SMA package.
FAQ
What is the exact breakdown voltage range for P4SMA47CAHM3/I?
The P4SMA47CAHM3/I has a guaranteed breakdown voltage (VBR) range of 44.7 V to 49.4 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This tight ±5% tolerance ensures repeatable clamping performance across production lots and temperature extremes from -65 °C to +150 °C.
Is P4SMA47CAHM3/I suitable for automotive applications?
Yes, P4SMA47CAHM3/I is AEC-Q101 qualified (automotive ordering code HM3 suffix), tested for temperature cycling, highly accelerated life testing (HALT), and ESD per JESD22-A114. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating make it approved for under-hood and cabin ECUs, ADAS sensors, and infotainment power supplies.
What does the "CA" suffix mean in P4SMA47CAHM3/I?
The "CA" suffix in P4SMA47CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. No polarity marking is present on the SMA package.
How does P4SMA47CAHM3/I compare to unidirectional P4SMA47AHM3/I?
The P4SMA47CAHM3/I differs from the unidirectional P4SMA47AHM3/I in having symmetrical clamping behavior and no cathode band marking. While both share identical VBR, VC, and PPPM ratings, the CA version is mandatory for AC-coupled, differential, or floating signal lines where polarity reversal occurs - such as RS-485, CAN, or audio paths.
What is the maximum clamping voltage of P4SMA47CAHM3/I under surge conditions?
The P4SMA47CAHM3/I clamps to a maximum of 64.8 V when subjected to its rated peak pulse current of 6.2 A (10/1000 µs waveform). This VC value is measured at the device terminals under standardized test conditions with 5.0 mm × 5.0 mm copper pads, ensuring realistic worst-case protection margin for downstream circuitry.
P4SMA47CAHM3/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:
- -
- 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/I FAQ
1.How can I place an order for P4SMA47CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAHM3/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/I reliable?
The price and inventory of P4SMA47CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for P4SMA47CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAHM3/I?
P4SMA47CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAHM3/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/I?
For technical support, including P4SMA47CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAHM3/I requirements.
6.How does Aetrix verify that P4SMA47CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of P4SMA47CAHM3/I?
All P4SMA47CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAHM3/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/I part is unused and in its original packaging.
Return procedure for P4SMA47CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47CAHM3/I Tags
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