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Vishay General Semiconductor - Diodes Division P4SMA75CAHM3_A/H
- Part No.:
- P4SMA75CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA75CAHM3_A/H.pdf
- Description:
- TVS DIODE 64.1VWM 104VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA75CAHM3_A/H 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 64.1 V standoff voltage (VWM), 71.3–78.8 V breakdown voltage (VBR) at 1 mA, 104 V maximum clamping voltage (VC) at 3.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P4SMA75CAHM3_A/H datasheet, P4SMA75CAHM3_A/H pinout, P4SMA75CAHM3_A/H application, or P4SMA75CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low thermal resistance (RθJL = 30 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports high-density layout and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with clamping performance validated at TA = 25 °C on 0.2" × 0.2" copper pads. Thermal resistance from junction to lead is 30 °C/W, supporting reliable operation up to TJ = 150 °C in constrained thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 64.1 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 71.3–78.8 V at 1 mA - Voltage range where device enters avalanche conduction; tight tolerance enables predictable protection onset. |
| VC (Clamping) | 104 V at 3.9 A (10/1000 µs) - Maximum voltage seen by protected circuit during surge; critical for IC-level overvoltage margining. |
| PPPM | 400 W - Peak transient energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V systems. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or industrial enclosures without derating. |
| RθJL | 30 °C/W - Low junction-to-lead thermal resistance; enables efficient heat transfer to PCB traces during repetitive surge events. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction enables protection of AC, differential, or floating signal lines without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential buses (e.g., RS-485, CAN FD) and AC-coupled analog inputs without polarity concerns. |
| 400 W peak pulse power | Supports robust immunity against IEC 61000-4-5 surge events up to 1 kV open-circuit / 0.5 kA short-circuit on 24 V supply rails. |
| AEC-Q101 qualified & halogen-free | Meets automotive electronics reliability standards and environmental compliance (RoHS + JESD201 Class 2 whisker resistance). |
| Low RθJL = 30 °C/W | Minimizes junction temperature rise during repetitive transients, extending lifetime in high-duty-cycle industrial control applications. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V automotive sensor signal lines (e.g., crankshaft position, oxygen sensor) from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and ground to limit voltage excursions to ≤104 V during ISO 7637-2 Pulse 5a/b events. Use Value: Prevents damage to downstream signal-conditioning amplifiers and ADC inputs while maintaining signal integrity via sub-nanosecond response. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field wiring surges in factory automation environments. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals, coordinated with upstream fuse and series impedance. Use Value: Enables >100,000 surge cycles at 400 W without parameter drift, reducing field failure rates in harsh electromagnetic environments. |
| RS-485 Transceiver Protection | Telecom Line Interface Protection |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., MAX1487, SN65HVD72) in building management systems from EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Differential-mode TVS connected across A/B bus lines to clamp common-mode and differential transients simultaneously. Use Value: Maintains bus integrity during 4 kV EFT bursts (IEC 61000-4-4) with <1 ns response, preventing data corruption and transceiver latch-up. |
Use Scenario: Protecting Ethernet PHY interfaces and DSL line drivers in residential gateways from induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), limiting let-through voltage to <104 V before silicon fails. Use Value: Achieves system-level IEC 61000-4-5 Level 4 compliance (4 kV line-earth) with minimal capacitance impact on 100BASE-TX signal integrity. |
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 | Same VWM/VC, but SMB package (DO-214AA); higher RθJA = 150 °C/W vs. 120 °C/W for P4SMA75CAHM3_A/H. | Lower power density; less suitable for high-repetition-rate surges in space-constrained layouts. | Select when board area permits larger footprint and thermal budget allows higher junction rise. |
| 1.5KE75CA | Through-hole TO-204AE (DO-201AE); 1500 W peak power, but slower response and incompatible with SMT assembly. | Used in legacy designs or high-energy surge zones where manual assembly is acceptable. | Choose only for retrofit or non-automated production; not recommended for new SMT-based automotive or industrial designs. |
Compared with SMBJ75CA and 1.5KE75CA, P4SMA75CAHM3_A/H offers superior SMT manufacturability, lower thermal resistance, and AEC-Q101 qualification - making it the preferred choice for next-generation automotive and industrial control modules requiring high-reliability, high-density surge protection.
Availability
P4SMA75CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, RS-485 communication ports, and telecom line drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA75CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume surge protection needs in automotive, industrial, and communications equipment - delivering AEC-Q101-qualified TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the clamping voltage of P4SMA75CAHM3_A/H at its rated peak pulse current?
The P4SMA75CAHM3_A/H has a maximum clamping voltage (VC) of 104 V at 3.9 A peak pulse current under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA75CAHM3_A/H maintains this clamping performance across its specified operating temperature range.
Is P4SMA75CAHM3_A/H suitable for automotive applications?
Yes, P4SMA75CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting automotive-grade reliability requirements for under-hood and chassis-mounted electronics. Its bidirectional architecture, 150 °C junction rating, and MSL Level 1 reflow compatibility make P4SMA75CAHM3_A/H appropriate for engine control units, ADAS sensor interfaces, and body electronics surge protection.
How does the bidirectional design of P4SMA75CAHM3_A/H affect its PCB layout?
The bidirectional design of P4SMA75CAHM3_A/H eliminates polarity marking and orientation constraints - both terminals are functionally identical, allowing placement in either direction across protected lines. This simplifies layout for differential signals (e.g., CAN, RS-485) and reduces assembly errors. No cathode band or silkscreen polarity indicator is required for P4SMA75CAHM3_A/H, unlike unidirectional variants.
What is the thermal resistance from junction to ambient for P4SMA75CAHM3_A/H?
The typical junction-to-ambient thermal resistance (RθJA) for P4SMA75CAHM3_A/H is 120 °C/W when mounted on minimum recommended pad layout per Vishay's datasheet. However, its junction-to-lead resistance (RθJL) is 30 °C/W - a more relevant metric for SMT applications where heat transfers primarily through solder joints into PCB copper. This low RθJL supports stable operation during repetitive surge events in P4SMA75CAHM3_A/H deployments.
Does P4SMA75CAHM3_A/H meet any safety certifications?
Yes, P4SMA75CAHM3_A/H carries Underwriters Laboratory (UL) Recognition under file E136766 for both unidirectional and bidirectional devices, classified per UL 497B for protectors. This certification validates its suitability in safety-critical surge protection circuits across consumer, industrial, and telecom applications - independent of the AEC-Q101 qualification also held by P4SMA75CAHM3_A/H.
P4SMA75CAHM3_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):
- 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_A/H FAQ
1.How can I place an order for P4SMA75CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA75CAHM3_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 P4SMA75CAHM3_A/H reliable?
The price and inventory of P4SMA75CAHM3_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 P4SMA75CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA75CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA75CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA75CAHM3_A/H?
P4SMA75CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA75CAHM3_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 P4SMA75CAHM3_A/H?
For technical support, including P4SMA75CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA75CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA75CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA75CAHM3_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 P4SMA75CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA75CAHM3_A/H?
All P4SMA75CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA75CAHM3_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 P4SMA75CAHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA75CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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