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Vishay General Semiconductor - Diodes Division P4SMA43CAHM3/I
- Part No.:
- P4SMA43CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAHM3/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,245
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Product details
Overview
P4SMA43CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 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 - suitable for protecting automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the P4SMA43CAHM3/I datasheet, P4SMA43CAHM3/I pinout, P4SMA43CAHM3/I application, or P4SMA43CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternatives for ESD/surge protection design-in.
Technical Context
The P4SMA43CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with 120 °C/W junction-to-ambient thermal resistance and 30 °C/W junction-to-lead resistance. The device is halogen-free, RoHS-compliant, and AEC-Q101 qualified per HM3 suffix - confirming suitability for automotive-grade PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36.8 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transient events. |
| VC (Clamping Voltage) | 59.3 V at 6.7 A (10/1000 µs) - Peak voltage seen by protected circuit during rated surge; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized surge waveform; enables robust protection against IEC 61000-4-5 level 3/4 surges. |
| IPPM (Peak Pulse Current) | 6.7 A - Maximum non-repetitive surge current handled at VC; determines minimum trace width and layout derating requirements. |
| TJmax | 150 °C - Maximum junction temperature; sets thermal design limits for board-level power dissipation and ambient derating. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; used to calculate temperature rise under DC leakage or repetitive surges. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to reference plane (e.g., GND or signal return); forms symmetrical clamping path with cathode terminal. |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in bidirectional operation; no functional distinction - both terminals serve as dual-direction surge shunt points. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| 400 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment up to level 4 (4 kV line-earth). |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance mandates for EU, China RoHS, and automotive OEM sustainability programs. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 12 V automotive sensor signal lines (e.g., throttle position, oxygen sensor) from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamps ±50 V transients to <59.3 V, shielding downstream op-amps and ADC inputs. Use Value: Prevents latch-up or permanent damage to microcontroller analog front-ends under ISO 7637-2 pulse 5a/b conditions. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-response TVS diverts >6 A transients away from precision current-sense resistors and isolation amplifiers. Use Value: Maintains signal integrity and avoids system resets during lightning-induced surges on factory floor cabling. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control Board |
Use Scenario: Shielding Ethernet PHY or DSL line drivers from ESD and induced surges on outdoor-facing telecom ports. IC Role / Device Role / Timing Role: Clamps fast-rising transients (tr < 1 ns) before they reach sensitive transceivers, with sub-100 ps response time. Use Value: Achieves IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) and IEC 61000-4-5 Level 3 (2 kV line-earth) compliance. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Shunts inductive kickback (up to 400 W) across motor terminals or H-bridge MOSFETs during PWM switching. Use Value: Extends MOSFET lifetime and prevents false triggering of overvoltage protection circuits during high-dI/dt events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VWM/VBR/VC, but SMB (DO-214AA) package - 2.5 mm wider, 0.5 mm taller, higher RθJA (100 °C/W vs. 120 °C/W). | Preferred where board space allows larger footprint and higher surge margin (600 W PPPM) is needed. | Select SMBJ43CA when layout permits larger pad area and higher single-pulse energy handling is required. |
| 1.5SMC43CA | Same electrical specs, but SMC (DO-214AB) package - 3.5 mm wide, 2.5 mm thick, RθJA = 75 °C/W, 1500 W PPPM. | Used in high-power industrial drives and power supply inputs where thermal mass and surge headroom exceed SMA limits. | Choose 1.5SMC43CA for mains-connected circuits requiring >1 kW surge rating and enhanced thermal stability. |
Compared with P4SMA43CAHM3/I, SMBJ43CA offers higher surge rating in a slightly larger package, while 1.5SMC43CA provides significantly greater power handling and lower thermal resistance - making both suitable for upgraded protection tiers without changing circuit topology.
Availability
P4SMA43CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card surge protection, and consumer appliance motor control boards requiring stable component supply and AEC-Q101 compliance.
Supply support for P4SMA43CAHM3/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, MOSFETs, and passive components with emphasis on reliability and automotive-grade qualification.
The P4SMA series is engineered for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems requiring AEC-Q101 validation and robust surge immunity.
FAQ
What is the clamping voltage of P4SMA43CAHM3/I at its rated peak pulse current?
The P4SMA43CAHM3/I has a maximum clamping voltage (VC) of 59.3 V at 6.7 A peak pulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is P4SMA43CAHM3/I qualified for automotive applications?
Yes, P4SMA43CAHM3/I carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. It is approved for use in automotive powertrain, chassis, and body electronics where sustained reliability under temperature cycling, vibration, and surge stress is mandatory.
What does the "CA" suffix mean in P4SMA43CAHM3/I?
The "CA" suffix in P4SMA43CAHM3/I denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities. Unlike unidirectional variants (e.g., P4SMA43AHM3/I), it requires no polarity alignment during placement and is ideal for AC signal lines or differential buses.
What is the standoff voltage (VWM) of P4SMA43CAHM3/I, and why does it matter?
The standoff voltage (VWM) of P4SMA43CAHM3/I is 36.8 V - the maximum continuous reverse voltage the device blocks without significant leakage (<1 µA). This parameter ensures normal circuit operation remains unaffected while providing sufficient margin below the 40.9–45.2 V breakdown range to avoid false triggering during nominal conditions.
Can P4SMA43CAHM3/I be used in place of a unidirectional TVS like P4SMA43AHM3/I?
No - P4SMA43CAHM3/I is bidirectional and lacks polarity marking, whereas P4SMA43AHM3/I is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC-coupled or floating lines, while unidirectional parts are required for DC-biased rails where reverse conduction must be blocked.
P4SMA43CAHM3/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):
- 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/I FAQ
1.How can I place an order for P4SMA43CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAHM3/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 P4SMA43CAHM3/I reliable?
The price and inventory of P4SMA43CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA43CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAHM3/I?
P4SMA43CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAHM3/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 P4SMA43CAHM3/I?
For technical support, including P4SMA43CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAHM3/I requirements.
6.How does Aetrix verify that P4SMA43CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAHM3/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 P4SMA43CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA43CAHM3/I?
All P4SMA43CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAHM3/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 P4SMA43CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA43CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43CAHM3/I Tags
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