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Vishay General Semiconductor - Diodes Division P4SMA43CAHM3_A/H
- Part No.:
- P4SMA43CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAHM3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,981
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Product details
Overview
P4SMA43CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 43 V breakdown voltage (VBR), 36.8 V standoff voltage (VWM), 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the P4SMA43CAHM3_A/H datasheet, P4SMA43CAHM3_A/H pinout, P4SMA43CAHM3_A/H application, or P4SMA43CAHM3_A/H equivalent, this device serves as a halogen-free, AEC-Q101 qualified transient protector for bidirectional signal line protection where low clamping ratio, fast response, and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
The device delivers 400 W peak pulse power (derated to 300 W above 91 V) under standardized 10/1000 µs waveform conditions, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting operation up to 150 °C junction temperature in compact PCB layouts with 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA test current - defines reliable conduction onset threshold for transient suppression |
| VWM | 36.8 V - maximum continuous working voltage before significant leakage begins; sets safe operating margin below VBR |
| VC @ IPPM | 59.3 V at 6.7 A - clamping voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400 W - peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges when properly mounted |
| IPPM | 6.7 A - maximum non-repetitive surge current supported; correlates directly with VC and layout-dependent thermal dissipation |
| TJ max. | 150 °C - maximum junction temperature; allows operation in under-hood automotive environments with proper board thermal design |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated placement |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant (peak reflow 260 °C), no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either polarity) | One end of symmetrical PN junction; connects to line being protected without directional constraint |
| Cathode | Transient current exit (either polarity) | Other end of symmetrical PN junction; completes bidirectional clamping path to reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity sensitivity |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47 |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial OEM supply chains |
| 400 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in typical PCB implementations |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive downstream ICs |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across sensor output and ground to limit voltage excursions during ESD or ISO 7637-2 pulses. Use Value: Maintains signal integrity by clamping transients to ≤59.3 V while drawing only 1.0 µA leakage at 36.8 V, preventing sensor saturation or damage. |
Use Scenario: Safeguarding CAN_H and CAN_L lines in vehicle body control modules against ESD and coupled surges. IC Role / Device Role / Timing Role: Paired P4SMA43CAHM3_A/H devices placed line-to-ground on each bus wire to suppress common-mode and differential transients. Use Value: Provides symmetrical clamping with matched VC in both directions, preserving CAN signal eye diagram integrity during 10/1000 µs surges up to 400 W. |
| Telecom DSL Line Protection | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Shielding ADSL/VDSL line interface ICs from lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: Bidirectional TVS installed between tip/ring and ground in front-end filter stage to shunt high-energy transients before conditioning circuitry. Use Value: Withstands 6.7 A peak pulse current and clamps to 59.3 V, ensuring line driver ICs see no more than 60 V during 10/1000 µs threats per ITU-T K.20. |
Use Scenario: Protecting gate drivers and microcontrollers in washing machine motor control boards from back-EMF spikes during brushless DC motor commutation. IC Role / Device Role / Timing Role: Mounted across motor phase outputs and ground to clamp inductive kickback before it reaches logic-level components. Use Value: Fast response time and low VC/VBR ratio (1.46) ensure rapid energy diversion, reducing risk of MCU reset or driver latch-up during repeated switching cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Higher package thermal mass (SMB/DO-214AA); 600 W peak power; 64.5 V clamping at 6.2 A | Preferred for higher-power surge events where board space permits larger footprint | Select when >400 W surge handling is required and PCB layout accommodates SMB outline |
| 1.5KE43CA | Through-hole TO-204AE (DO-41); 1500 W peak power; 69.4 V clamping at 21.7 A | Suitable for prototyping or legacy through-hole designs; not SMT-compatible | Choose only for manual assembly or where mechanical robustness outweighs automated manufacturing needs |
Compared with P4SMA43CAHM3_A/H, SMBJ43CA offers greater surge margin in same bidirectional function but requires larger PCB area, while 1.5KE43CA provides significantly higher power handling at the cost of SMT incompatibility and reduced thermal cycling reliability in automotive applications.
Availability
P4SMA43CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom DSL line protection, and consumer appliance motor driver circuits requiring stable component supply with AEC-Q101 qualification and halogen-free compliance.
Supply support for P4SMA43CAHM3_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, 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 validation, and optimized thermal performance in compact surface-mount packages.
FAQ
What is the breakdown voltage tolerance for P4SMA43CAHM3_A/H?
The P4SMA43CAHM3_A/H has a specified breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1.0 mA test current, representing ±5% tolerance around the nominal 43 V rating. This tight distribution ensures predictable clamping onset across production lots and supports robust design margins in safety-critical applications like automotive sensor interfaces.
Is P4SMA43CAHM3_A/H suitable for automotive applications?
Yes, P4SMA43CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials. Its MSL Level 1 rating, 150 °C maximum junction temperature, and validation across temperature cycling, HTRB, and ESD tests make it suitable for under-hood and body-control module deployments where reliability under thermal and electrical stress is mandatory.
How does the clamping voltage of P4SMA43CAHM3_A/H compare to its standoff voltage?
P4SMA43CAHM3_A/H clamps at 59.3 V (VC) under 6.7 A 10/1000 µs surge while maintaining a 36.8 V standoff voltage (VWM). This yields a clamping ratio of 1.61, indicating effective transient suppression with sufficient margin below typical 60 V system rails - critical for protecting 3.3 V or 5 V logic interfaces downstream of the TVS.
What is the maximum allowable mounting pad size for optimal thermal performance of P4SMA43CAHM3_A/H?
For optimal thermal performance, P4SMA43CAHM3_A/H should be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal resistance and reduce peak pulse power derating, potentially limiting sustained surge handling below the rated 400 W in real-world PCB layouts.
Does P4SMA43CAHM3_A/H have polarity markings on the package?
No, P4SMA43CAHM3_A/H is a bidirectional TVS and carries no polarity marking on the SMA (DO-214AC) package. Unlike unidirectional variants, it functions identically regardless of orientation - simplifying PCB layout and eliminating risk of incorrect placement during automated assembly.
P4SMA43CAHM3_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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4SMA43CAHM3_A/H FAQ
1.How can I place an order for P4SMA43CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAHM3_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 P4SMA43CAHM3_A/H reliable?
The price and inventory of P4SMA43CAHM3_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 P4SMA43CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA43CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAHM3_A/H?
P4SMA43CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAHM3_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 P4SMA43CAHM3_A/H?
For technical support, including P4SMA43CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA43CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAHM3_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 P4SMA43CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA43CAHM3_A/H?
All P4SMA43CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAHM3_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 P4SMA43CAHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA43CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43CAHM3_A/H Tags
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