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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHM3_A/I
- Part No.:
- P4SMA9.1CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHM3_A/I.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,806
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Product details
Overview
P4SMA9.1CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 13.4 V clamping voltage (VC) at 29.9 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform). It protects signal lines in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the P4SMA9.1CAHM3_A/I datasheet, P4SMA9.1CAHM3_A/I pinout, P4SMA9.1CAHM3_A/I application, or P4SMA9.1CAHM3_A/I equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for automotive-grade board-level protection design.
Technical Context
The P4SMA9.1CAHM3_A/I operates as a bidirectional voltage-clamping device with symmetrical avalanche breakdown in both polarities, enabling transient suppression on AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<50 µA at VWM = 7.78 V).
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it achieves thermal resistance RθJA = 120 °C/W and supports continuous power dissipation of 3.3 W at TA = 50 °C. The device meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA test current - defines precise conduction onset for bidirectional overvoltage clamping |
| Stand-off Voltage VWM | 7.78 V maximum - ensures no conduction during normal 9 V rail operation, preserving signal integrity |
| Clamping Voltage VC | 13.4 V at 29.9 A IPPM - limits transient voltage to safe levels for downstream 12 V logic or analog ICs |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - sustains high-energy surges common in automotive load-dump or inductive kick scenarios |
| Operating Temperature Range | −65 °C to +150 °C - supports under-hood automotive deployment and industrial ambient extremes |
| Package | SMA (DO-214AC) - industry-standard SMD footprint compatible with automated placement and reflow profiles up to 260 °C peak |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive electronics per stress-test requirements including temperature cycling and HTRB |
Pinout & Package
SMA (DO-214AC) package: surface-mount, two-terminal, bidirectional configuration with no polarity marking; terminals are matte tin-plated for J-STD-002 solderability and JESD22-B102 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive overvoltage events; forms symmetrical path with cathode for bidirectional clamping |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative overvoltage events; enables full-wave protection without external polarity management |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded sensor outputs without polarity concerns |
| 400 W peak pulse power | Withstands automotive ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 Level 4 surges when mounted per recommended pad layout |
| AEC-Q101 qualified (HM3) | Validated for automotive use including temperature cycling, high-temperature reverse bias, and accelerated life testing per AEC specification |
| Halogen-free & RoHS-compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709E halogen-free criteria for environmentally constrained supply chains |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - eliminates bake requirements prior to reflow, reducing manufacturing overhead |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 5 V or 12 V analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor output and ground to clamp transients before they reach ADC input or op-amp buffer. Use Value: Prevents latch-up or permanent damage to precision analog front-ends while maintaining <50 µA leakage at 7.78 V stand-off. |
Use Scenario: Shielding digital input channels on programmable logic controllers from field-wiring induced surges in factory automation environments. IC Role / Device Role / Timing Role: Standoff-connected TVS on each 24 V DC input line, absorbing repetitive 1 kV/500 A transients per IEC 61000-4-5. Use Value: Delivers 13.4 V clamping at 29.9 A to keep microcontroller GPIO within absolute maximum ratings during surge events. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes and smart displays against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially between D+ and D−, leveraging symmetrical VBR to suppress fast-rising ESD pulses without signal distortion. Use Value: Achieves sub-nanosecond response and <0.5 pF junction capacitance (typ.) - preserves USB 2.0 signal integrity up to 480 Mbps. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI-X) in VoIP phones and DSL modems from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Common-mode TVS array element used in conjunction with gas discharge tubes for staged telecom surge protection. Use Value: Provides 400 W peak power handling and 13.4 V clamping to limit voltage stress on 100BASE-TX transformer windings and PHY ESD structures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | 600 W PPPM, SMB package (DO-214AA), higher IPPM = 42.9 A at same VC = 13.4 V | Requires larger PCB area; better suited for higher-energy industrial surges where space permits | Select when system-level surge tests exceed 400 W but SMA footprint is not mandatory |
| 1.5SMC9.0CA | 1500 W PPPM, SMC package (DO-214AB), VC = 13.4 V at 111 A, higher thermal mass | Used in primary-level AC/DC input protection; unsuitable for dense signal-layer layouts | Choose for front-end mains-side protection where energy absorption dominates footprint constraints |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the P4SMA9.1CAHM3_A/I offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W capability - making it the preferred choice for space-constrained automotive and industrial signal-line protection where MSL Level 1 and halogen-free compliance are required.
Availability
P4SMA9.1CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer USB interface designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant transient protection.
Supply support for P4SMA9.1CAHM3_A/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 protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The P4SMA Series targets board-level transient suppression in automotive, industrial, and consumer electronics, delivering standardized TVS performance in compact surface-mount packages with rigorous AEC-Q101 and RoHS compliance.
FAQ
What is the exact breakdown voltage range for P4SMA9.1CAHM3_A/I?
The P4SMA9.1CAHM3_A/I has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V measured at 1.0 mA test current (IT). This tight ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable design margining for 9 V nominal systems. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88367.
Is P4SMA9.1CAHM3_A/I suitable for automotive applications?
Yes, P4SMA9.1CAHM3_A/I is AEC-Q101 qualified (indicated by the HM3 suffix) and specifically designed for automotive use. It passes stress tests including temperature cycling, high-temperature reverse bias, and accelerated life testing per AEC-Q101 Rev D. The device is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where robust transient immunity is mandated.
What does the "CA" suffix mean in P4SMA9.1CAHM3_A/I?
The "CA" suffix in P4SMA9.1CAHM3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA9.1A), the CA version has no polarity marking and is used where AC signals, differential buses, or floating grounds require equal clamping in either direction.
What is the maximum clamping voltage of P4SMA9.1CAHM3_A/I under surge conditions?
The P4SMA9.1CAHM3_A/I exhibits a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 29.9 A using the standard 10/1000 µs waveform. This value is measured per Figure 1 in the datasheet and ensures downstream 12 V logic or analog components remain within safe operating voltage limits during transient events.
Does P4SMA9.1CAHM3_A/I require special handling during PCB assembly?
No, P4SMA9.1CAHM3_A/I is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. It requires no dry-packaging, baking, or special storage - enabling direct placement into standard lead-free reflow profiles. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 for reliable solder joint formation.
P4SMA9.1CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
P4SMA9.1CAHM3_A/I FAQ
1.How can I place an order for P4SMA9.1CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHM3_A/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 P4SMA9.1CAHM3_A/I reliable?
The price and inventory of P4SMA9.1CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHM3_A/I?
P4SMA9.1CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHM3_A/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 P4SMA9.1CAHM3_A/I?
For technical support, including P4SMA9.1CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA9.1CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHM3_A/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 P4SMA9.1CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHM3_A/I?
All P4SMA9.1CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHM3_A/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 P4SMA9.1CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CAHM3_A/I Tags
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