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Vishay General Semiconductor - Diodes Division P4SMA47CAHM3/H
- Part No.:
- P4SMA47CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAHM3/H.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
P4SMA47CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping ESD and surge transients on signal/power lines. It features 47 V breakdown voltage (VBR min/max = 44.7–49.4 V at 1 mA), 400 W peak pulse power (10/1000 µs), and 64.8 V maximum clamping voltage (VC) at 6.2 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P4SMA47CAHM3/H datasheet, P4SMA47CAHM3/H pinout, P4SMA47CAHM3/H application, or P4SMA47CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA47CAHM3/H operates as a voltage-clamped crowbar device: when reverse (or forward, in bidirectional mode) voltage exceeds VBR, it transitions from high-impedance to low-impedance state within <1 ps, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive transients.
Rated for 150 °C max junction temperature and MSL Level 1 (260 °C reflow peak), it supports automotive-grade operation per AEC-Q101. The 3.3 W steady-state power dissipation and 120 °C/W junction-to-ambient thermal resistance require appropriate PCB copper area (0.2" × 0.2") for thermal management during sustained overvoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines precise clamping onset threshold for bidirectional surge suppression |
| VWM | 40.2 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 64.8 V at 6.2 A - maximum clamped voltage during 400 W 10/1000 µs surge; determines protected IC's voltage stress limit |
| PPPM | 400 W - peak transient energy handling capacity; enables robust protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 6.2 A - peak pulse current capability at rated waveform; defines minimum trace width and fuse coordination |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures without derating |
| Package | SMA (DO-214AC) - surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard 7" tape-and-reel (1800 pcs/reel) |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Connects to line being protected; conducts surge current toward ground or rail during either polarity excursion |
| Cathode | Transient current sink (bidirectional) | Electrically symmetric with Anode; no polarity marking required; both terminals function identically in clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment I/O |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance; suitable for green manufacturing |
| 400 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-earth) and ISO 7637-2 Pulse 1/2b/5a in automotive subsystems |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping ±400 V transients within nanoseconds. Use Value: Prevents permanent damage to 5 V/3.3 V sensor interface ICs while maintaining signal integrity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Shielding PLC digital input channels from 24 V DC field wiring surges caused by relay coil de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Standoff voltage (40.2 V) exceeds nominal 24 V supply, enabling continuous monitoring without leakage interference. Use Value: Eliminates need for external series impedance or RC filters, simplifying board layout and reducing BOM count. |
| Telecom Line Card Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding Ethernet PHYs and xDSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Placed differential-mode across pairs; bidirectional symmetry matches AC-coupled signaling standards. Use Value: Maintains signal fidelity up to 100 MHz due to low junction capacitance and avoids DC bias shift on data lines. |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines downstream of integrated port protectors in smartphones and peripherals. IC Role / Device Role / Timing Role: Fast response (<1 ps) clamps ±15 kV HBM ESD events before internal PHY sustains damage. Use Value: Complements primary protection with lower clamping voltage than polymer-based TVS, improving system-level robustness. |
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 | Preferred where higher surge rating or improved thermal dissipation is needed; larger footprint (6.2 mm × 4.6 mm) | Select SMBJ47CA when PCB space allows and 600 W surge immunity is required beyond P4SMA47CAHM3/H's 400 W rating |
| 1.5SMC47CA | Same VBR and bidirectionality; SMC package (DO-214AB); 1500 W PPPM; higher IPPM (31.9 A) | Used in primary-level AC/DC front-end protection; not suited for fine-pitch signal-line placement | Choose 1.5SMC47CA only for high-energy surge zones (e.g., power entry), not for space-constrained signal routing near ICs |
Compared with SMBJ47CA and 1.5SMC47CA, the P4SMA47CAHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge handling - making it ideal for secondary-level protection in automotive and industrial signal chains where board area and automotive compliance are critical.
Availability
P4SMA47CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line card surge hardening, and consumer USB port ESD suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA47CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for robust transient suppression in automotive, industrial, and telecom systems - delivering standardized TVS performance in compact surface-mount packages with AEC-Q101 and halogen-free variants.
FAQ
What does the "CA" suffix indicate in P4SMA47CAHM3/H?
The "CA" suffix in P4SMA47CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges without requiring polarity-aware layout. This differs from unidirectional "A" variants, which clamp only in reverse bias and require cathode orientation. The CA version is essential for AC-coupled or floating signal lines like CAN bus or telecom pairs.
Is P4SMA47CAHM3/H qualified for automotive use?
Yes, P4SMA47CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HM3" = halogen-free + AEC-Q101) and documentation revision 09-Jan-2024. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge endurance applicable to automotive electronic control units, including under-hood and cabin-mounted modules.
What is the maximum clamping voltage of P4SMA47CAHM3/H and how is it measured?
The maximum clamping voltage (VC) of P4SMA47CAHM3/H is 64.8 V, measured at 6.2 A peak pulse current using the standardized 10/1000 µs double-exponential surge waveform. This value represents the highest voltage that appears across the device during a 400 W transient event - directly determining the peak stress imposed on downstream ICs and defining the minimum required voltage margin for protected circuitry.
How does the HM3 suffix differ from E3 or M3 in P4SMA47CAHM3/H?
The "HM3" suffix in P4SMA47CAHM3/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinct from "E3" (RoHS-compliant commercial grade) and "M3" (halogen-free RoHS-compliant commercial grade). Only HM3 and HE3 variants carry automotive qualification; HM3 further guarantees absence of brominated flame retardants and meets JESD201 Class 2 whisker resistance for high-reliability solder joints.
Can P4SMA47CAHM3/H be used in place of a unidirectional TVS like P4SMA47AHM3/H?
No - P4SMA47CAHM3/H is strictly bidirectional and lacks polarity marking, whereas P4SMA47AHM3/H is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating references, while unidirectional types are used with DC-biased lines where forward conduction must be blocked. Interchange risks incorrect clamping behavior or forward conduction during normal operation.
P4SMA47CAHM3/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:
- 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/H FAQ
1.How can I place an order for P4SMA47CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAHM3/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 P4SMA47CAHM3/H reliable?
The price and inventory of P4SMA47CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA47CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAHM3/H?
P4SMA47CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAHM3/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 P4SMA47CAHM3/H?
For technical support, including P4SMA47CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAHM3/H requirements.
6.How does Aetrix verify that P4SMA47CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAHM3/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 P4SMA47CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA47CAHM3/H?
All P4SMA47CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAHM3/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 P4SMA47CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA47CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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