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Vishay General Semiconductor - Diodes Division P4SMA75CAHM3/I
- Part No.:
- P4SMA75CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA75CAHM3/I.pdf
- Description:
- TVS DIODE 64.1VWM 104VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,304
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Product details
Overview
P4SMA75CAHM3/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 and power lines. It features a 75 V standoff voltage (VWM), 82.9 V minimum breakdown voltage (VBR), 104 V maximum clamping voltage (VC) at 3.9 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA75CAHM3/I datasheet, P4SMA75CAHM3/I pinout, P4SMA75CAHM3/I application, or P4SMA75CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), clamping performance under surge conditions, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA75CAHM3/I operates bidirectionally with symmetrical clamping in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance supports fast transient suppression with minimal voltage overshoot.
Rated for 150 °C maximum junction temperature and compliant with MSL Level 1 (260 °C reflow peak), it sustains repetitive 10/1000 µs surges at 0.01% duty cycle. The device meets UL 497B recognition (QVGQ2) and is qualified to AEC-Q101 for automotive applications when ordered with HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 82.9–91.6 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 104 V at 3.9 A IPPM - Peak voltage seen across protected circuit during 10/1000 µs surge; directly limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard 10/1000 µs waveform; enables robust ESD and lightning surge immunity. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; determines derating needed above 25 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; supports under-hood and infotainment use. |
| Construction | Halogen-free, RoHS-compliant, matte tin-plated leads - Meets J-STD-002/JESD22-B102 solderability and JESD201 Class 2 whisker requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with molded UL 94 V-0 compound. Cathode band not marked (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry point (positive polarity) | Other terminal of symmetrical junction; conducts during positive transients; no marking distinguishes terminals in bidirectional version. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance when combined with appropriate PCB layout and series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.25) | Minimizes overvoltage exposure during surge events - critical for safeguarding 75 V-rated interface ICs and gate drivers. |
| AEC-Q101 qualification (HM3 suffix) | Validates long-term reliability under automotive thermal, mechanical, and humidity stress profiles - required for OEM Tier-1 designs. |
| MSL Level 1 rating | Permits standard SMT reflow without baking or special handling; compatible with high-volume automated assembly. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp ±100 V transients within 1 ns response time. Use Value: Prevents latch-up or permanent damage to 5 V/12 V sensor signal conditioning ICs by limiting voltage to ≤104 V during 3.9 A surge events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and 0–10 V analog inputs in programmable logic controllers against field wiring faults and EFT bursts. IC Role / Device Role / Timing Role: Standoff-connected TVS on input terminals to absorb 400 W surges without affecting normal 24 V DC operation. Use Value: Maintains signal integrity during 10/1000 µs transients up to 4 kV while adding <0.5 pF capacitance - no bandwidth degradation in 100 kHz sensor channels. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Output Clamping |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails and data line terminations in enterprise switches and base stations. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between isolated DC-DC output and PHY IC supply pins to suppress coupled lightning surges. Use Value: Limits voltage excursions to 104 V during 3.9 A surges, protecting 3.3 V/5 V PHYs rated for ≤12 V absolute maximum without derating design margins. |
Use Scenario: Output rail clamping in USB PD and Qi wireless charging adapters to prevent overvoltage damage during feedback loop failure or transient coupling. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5–20 V output to clamp fault-induced spikes before reaching connected devices. Use Value: Delivers 400 W surge capacity with 104 V clamping ceiling - ensures compliance with UL 62368-1 abnormal condition testing for end-user safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Higher package thermal mass (SMB/DO-214AA); RθJA = 80 °C/W; same VWM/VC but 600 W PPPM rating. | Better suited for higher average power dissipation in industrial motor drives; larger footprint requires PCB redesign. | Select SMBJ75CA when sustained surge repetition or >100 °C ambient operation demands lower thermal resistance. |
| 1.5SMC75CA | Higher power rating (1500 W PPPM); larger SMC (DO-214AB) package; identical VWM/VC specs but higher IPPM (12.3 A). | Used where system-level surge tests exceed IEC 61000-4-5 Level 4; incompatible with SMA footprints due to 7.11 mm width vs. 4.5 mm. | Choose 1.5SMC75CA only if board space allows wider package and higher surge immunity is mandated by end-equipment standards. |
Compared with SMBJ75CA and 1.5SMC75CA, the P4SMA75CAHM3/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge handling - making it ideal for space-constrained automotive and portable industrial modules where layout reuse and qualification traceability are critical.
Availability
P4SMA75CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line cards, and consumer power adapter outputs requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA75CAHM3/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 optimization.
The P4SMA Series was developed for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering standardized 400 W surge capability in compact surface-mount packages with AEC-Q101 and UL recognition.
FAQ
What does the "CA" suffix indicate in P4SMA75CAHM3/I?
The "CA" suffix in P4SMA75CAHM3/I denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P4SMA75AHM3/I), the CA version provides symmetrical clamping for both positive and negative voltage transients - essential for protecting AC-coupled circuits, differential buses, or floating power domains without polarity constraints. This is confirmed in Vishay's P4SMA datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is P4SMA75CAHM3/I qualified for automotive applications?
Yes, P4SMA75CAHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). Vishay explicitly states in the ordering information table that HM3 parts meet AEC-Q101 requirements for automotive-grade reliability, including temperature cycling, high-temperature reverse bias, and ESD testing - making P4SMA75CAHM3/I suitable for engine control units, ADAS sensors, and infotainment systems.
What is the maximum clamping voltage of P4SMA75CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of P4SMA75CAHM3/I is 104 V at 3.9 A peak pulse current (IPPM) with a 10/1000 µs waveform, per the Electrical Characteristics table on page 2 of the Vishay P4SMA datasheet (Doc. #88367, rev. 09-Jan-2024). This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and is critical for ensuring compatibility with 75 V-rated downstream components.
How does the thermal resistance of P4SMA75CAHM3/I affect its derating?
P4SMA75CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads. This means power dissipation must be reduced linearly above 25 °C ambient - for example, at 85 °C ambient, the allowable continuous power drops to approximately 1.65 W (3.3 W × [1 − (85−25)/120]). Derating curves are provided in Figure 2 of the Vishay P4SMA datasheet to ensure safe operation within the 150 °C maximum junction temperature limit.
Does P4SMA75CAHM3/I have UL recognition?
Yes, P4SMA75CAHM3/I carries Underwriters Laboratory (UL) recognition under file number E136766 for both unidirectional and bidirectional configurations, per the "+" symbol notation in the Electrical Characteristics table and footnote (+) on page 2 of the Vishay P4SMA datasheet. It is classified per UL 497B for signal circuit protectors, confirming suitability for safety-critical telecom, industrial, and consumer applications requiring third-party certification.
P4SMA75CAHM3/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):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 104V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
P4SMA75CAHM3/I FAQ
1.How can I place an order for P4SMA75CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA75CAHM3/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 P4SMA75CAHM3/I reliable?
The price and inventory of P4SMA75CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA75CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA75CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA75CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA75CAHM3/I?
P4SMA75CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA75CAHM3/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 P4SMA75CAHM3/I?
For technical support, including P4SMA75CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA75CAHM3/I requirements.
6.How does Aetrix verify that P4SMA75CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA75CAHM3/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 P4SMA75CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA75CAHM3/I?
All P4SMA75CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA75CAHM3/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 P4SMA75CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA75CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA75CAHM3/I Tags
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