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Vishay General Semiconductor - Diodes Division P4SMA7.5CAHM3/H
- Part No.:
- P4SMA7.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5CAHM3/H.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
P4SMA7.5CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 7.5 V standoff voltage (VWM), 8.3 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 μs). It delivers clamping voltage of 12.0 V at 33.1 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection against inductive switching transients.
For engineers reviewing the P4SMA7.5CAHM3/H datasheet, P4SMA7.5CAHM3/H pinout, P4SMA7.5CAHM3/H application, or P4SMA7.5CAHM3/H equivalent, key selection criteria include bidirectional clamping behavior, 12.0 V VC at IPPM, -65 °C to +150 °C operating junction temperature, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity rating.
Technical Context
The P4SMA7.5CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for protecting sensitive signal lines and power rails.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it sustains 400 W peak pulse power under 10/1000 μs waveform with 0.01% duty cycle, derating linearly above 25 °C ambient per Fig. 2. Thermal resistance is 120 °C/W junction-to-ambient and 30 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V–12 V rail protection. |
| VBR (Breakdown Voltage) | 8.3 V min / 9.2 V max at 10 mA - Confirmed avalanche onset range; ensures reliable triggering within ±5% tolerance. |
| VC (Clamping Voltage) | 12.0 V at 33.1 A IPPM - Measured maximum voltage seen by protected circuit during 10/1000 μs transient; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy-handling capability under standardized lightning/surge waveform; supports IEC 61000-4-5 level 3/4 compliance. |
| ID (Reverse Leakage) | 500 μA max at 7.5 V - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance sensor interfaces. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal derating penalties. |
| Package | SMA (DO-214AC) - Standardized 2-pin SMD footprint compatible with automated placement; 5.28 mm × 4.50 mm body size. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetrical; device has two identical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction between pins. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and return. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IPC-4101D/21 and JEDEC J-STD-609A Class 1 requirements; supports green manufacturing and end-of-life recycling. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free soldering without pre-baking; eliminates moisture-related popcorning risk during assembly. |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 pulse 1/2a/2b/5a and IEC 61000-4-5 combination wave surges up to 4 kV. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure during clamping; improves margin for 3.3 V and 5 V logic-level interface protection. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines or single-ended signal-to-ground paths. Use Value: Limits transient voltage to ≤12.0 V, preserving signal integrity and preventing latch-up in 5 V tolerant transceivers such as TJA1042 or SN65HVD230. |
Use Scenario: Safeguarding CAN FD physical layer nodes in factory automation controllers exposed to motor drive noise and relay switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on CAN_H and CAN_L lines referenced to ground, absorbing common-mode surges. Use Value: Withstands repetitive 400 W pulses without degradation, maintaining <500 μA leakage at 7.5 V to avoid bus bias shift or false dominant states. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level surge suppression on USB 2.0 D+/D− lines after primary polymer-based TVS, targeting system-level IEC 61000-4-2 Level 4 (15 kV air/8 kV contact). IC Role / Device Role / Timing Role: Fast-response bidirectional clamp shunting ESD current away from USB PHY ICs like USB3300 or TUSB2036. Use Value: Sub-1 ns response time and 12.0 V clamping ensure data-line voltage stays below 13.3 V absolute maximum rating of most USB transceivers. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers and SLIC circuits against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Paired P4SMA7.5CAHM3/H devices used in back-to-back configuration across tip/ring and tip/ground. Use Value: 400 W peak power rating supports GR-1089-CORE Zone 3 surge immunity; halogen-free construction meets telecom flame-retardancy mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 50% larger footprint (4.57 mm × 3.94 mm vs. 5.28 mm × 4.50 mm), higher RθJA (100 °C/W). | Requires PCB layout change; better suited for higher-power derating scenarios where thermal mass is available. | Select when board space allows larger package and higher thermal margin is needed beyond 400 W. |
| 1.5KE7.5CA | Through-hole DO-15 package; same electrical specs but 1.5 kW peak power rating and 5.0 A IFSM (vs. none for bidirectional P4SMA). | Not suitable for automated SMT lines; intended for prototyping or legacy through-hole designs. | Choose only for manual assembly or retrofit applications where SMT is unavailable. |
Compared with SMBJ7.5CA and 1.5KE7.5CA, the P4SMA7.5CAHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and verified 400 W surge handling-making it the preferred choice for high-volume automotive and industrial SMT production.
Availability
P4SMA7.5CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer USB ports, and telecom DSL line cards requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P4SMA7.5CAHM3/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 transient protection needs in automotive, industrial, and communications systems-designed for robustness under harsh electrical and thermal conditions while supporting automated manufacturing.
FAQ
What does the "HM3" suffix indicate in P4SMA7.5CAHM3/H?
The HM3 suffix in P4SMA7.5CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-609A Class 1 and IPC-4101D/21, and guarantees automotive-grade reliability testing including temperature cycling, HTRB, and ESD per JESD22-A114. The "H" indicates 7″ tape-and-reel packaging (1800 units per reel).
Is P4SMA7.5CAHM3/H suitable for protecting 3.3 V logic circuits?
No-P4SMA7.5CAHM3/H is not recommended for direct 3.3 V rail protection because its 7.5 V standoff voltage exceeds typical 3.3 V system margins. Its minimum breakdown voltage starts at 8.3 V, and clamping occurs at 12.0 V, which would damage 3.3 V ICs. For 3.3 V applications, use lower-VWM devices such as P4SMA3.3CA or SMAJ3.3CA instead.
Does P4SMA7.5CAHM3/H have polarity markings on the package?
No, P4SMA7.5CAHM3/H has no polarity markings because it is a bidirectional TVS diode. Both terminals are functionally identical and interchangeable; the device clamps symmetrically in either direction. This contrasts with unidirectional variants (e.g., P4SMA7.5A) that feature a cathode band.
What is the maximum allowable PCB pad size for P4SMA7.5CAHM3/H to achieve full 400 W rating?
To achieve the full 400 W peak pulse power rating, P4SMA7.5CAHM3/H must be mounted on minimum recommended copper pads: 0.2″ × 0.2″ (5.0 mm × 5.0 mm) per terminal, per Vishay Document 88367 Fig. 1. Smaller pads reduce thermal dissipation and require derating per Fig. 2-e.g., at 75 °C ambient, power drops to ~280 W with standard pad layout.
How does P4SMA7.5CAHM3/H perform under repeated surge events?
P4SMA7.5CAHM3/H is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (1 pulse per 10,000 μs). Under this condition, it maintains stable VBR and VC performance without degradation. Exceeding this duty cycle causes junction temperature rise beyond safe limits, risking parametric shift or failure-thermal design and event spacing must be validated per application.
P4SMA7.5CAHM3/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):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 35.4A
- 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)
P4SMA7.5CAHM3/H FAQ
1.How can I place an order for P4SMA7.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5CAHM3/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 P4SMA7.5CAHM3/H reliable?
The price and inventory of P4SMA7.5CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA7.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5CAHM3/H?
P4SMA7.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5CAHM3/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 P4SMA7.5CAHM3/H?
For technical support, including P4SMA7.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5CAHM3/H requirements.
6.How does Aetrix verify that P4SMA7.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5CAHM3/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 P4SMA7.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA7.5CAHM3/H?
All P4SMA7.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5CAHM3/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 P4SMA7.5CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA7.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA7.5CAHM3/H Tags
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