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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHM3_A/H
- Part No.:
- P4SMA9.1CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHM3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
P4SMA9.1CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 13.4 V maximum clamping voltage (VC) at 29.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA9.1CAHM3_A/H datasheet, P4SMA9.1CAHM3_A/H pinout, P4SMA9.1CAHM3_A/H application, or P4SMA9.1CAHM3_A/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring robust ESD and surge immunity without layout redesign.
Technical Context
The P4SMA9.1CAHM3_A/H operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±13.4 V while maintaining ≤50 µA reverse leakage at its 7.78 V stand-off voltage (VWM). Its glass-passivated junction ensures stable breakdown characteristics over temperature (±0.068 %/°C tempco) and supports repetitive surge events at 0.01 % duty cycle.
Mounted on standard 5.0 mm × 5.0 mm copper pads, it achieves 400 W peak pulse power dissipation per JEDEC 10/1000 µs waveform, derating linearly above TA = 25 °C to 300 W above 91 V - though this unit's 9.1 V rating retains full 400 W capability. Junction temperature remains within -65 °C to +150 °C operating range under specified surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA test current - defines precise clamping onset threshold for bidirectional transients |
| Stand-off Voltage VWM | 7.78 V - maximum continuous working voltage before leakage exceeds 50 µA; sets safe operating margin below VBR |
| Clamping Voltage VC | 13.4 V at 29.9 A IPPM - limits transient voltage seen by protected ICs during 10/1000 µs surge |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - enables protection against IEC 61000-4-5 Level 3 surges (1 kV/42 Ω) |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height for automated placement |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Moisture Sensitivity | MSL Level 1 (per J-STD-020) - no floor life limitation; supports reflow up to 260 °C peak |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as clamping node; bidirectional operation eliminates need for orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 1 kV line-to-line in industrial control systems |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes voltage overshoot during fast transients, reducing stress on downstream 3.3 V or 5 V logic |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets automotive environmental requirements and enables use in EU and China GB/T standards-compliant assemblies |
| MSL Level 1, 260 °C reflow compatible | Eliminates baking requirements and supports standard lead-free assembly processes without reliability risk |
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications with extended temperature cycling and HTRB testing |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD events in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Clamps transients to ≤13.4 V while sustaining 400 W pulses - prevents latch-up and permanent damage to 5 V tolerant transceivers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff protector across input terminals, absorbing repetitive 100 ns–1 ms spikes from solenoid drivers and relay coils. Use Value: 7.78 V VWM provides 20 % margin above nominal 24 V supply ripple, enabling reliable detection of valid logic-high signals. |
| Consumer Appliance Motor Control | Telecom Power Supply Input |
Use Scenario: Shielding microcontroller GPIOs connected to brushless motor hall-effect sensors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Local TVS at sensor PCB edge, placed adjacent to connector to minimize trace inductance during surge events. Use Value: Fast response time and low VC ensure MCU reset pins remain below absolute maximum ratings during commutation spikes. |
Use Scenario: Secondary-side transient suppression on 12 V DC input rails of VoIP gateways and small-cell base station power modules. IC Role / Device Role / Timing Role: Final-stage clamp after bulk filtering and before DC/DC converter input, handling residual surges escaping primary protection. Use Value: 400 W rating handles coupled lightning-induced surges up to 10 A without degradation, supporting EN 61000-4-5 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Higher VBR (8.55–9.45 V), same SMA package, 600 W PPPM rating | Better suited for higher-energy surges but requires tighter VWM margin (7.2 V) in 5 V systems | Select when system-level surge testing exceeds IEC 61000-4-5 Level 3 and board space permits larger thermal mass |
| 1.5SMC9.0CA | Same VBR range, SMC (DO-214AB) package, 1500 W PPPM, higher thermal resistance | Requires larger PCB footprint (7.11 mm × 6.22 mm) and supports heavier industrial surge loads | Choose for legacy designs using SMC footprints or where 1500 W surge headroom justifies added size and cost |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the P4SMA9.1CAHM3_A/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W capability - making it preferred for space-constrained automotive and industrial modules where MSL Level 1 and halogen-free compliance are mandatory.
Availability
P4SMA9.1CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power rail stabilization requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P4SMA9.1CAHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The P4SMA series was developed specifically for surface-mount transient suppression in space-constrained, high-volume applications - emphasizing AEC-Q101 qualification, MSL Level 1 compatibility, and consistent clamping performance across temperature.
FAQ
What does the "HM3" suffix indicate in P4SMA9.1CAHM3_A/H?
The "HM3" suffix in P4SMA9.1CAHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive environmental standards, including JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability rating for the molding compound - essential for under-hood and safety-critical modules.
Is P4SMA9.1CAHM3_A/H unidirectional or bidirectional?
P4SMA9.1CAHM3_A/H is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping for positive and negative transients, with identical VBR, VWM, and VC specifications in both directions - eliminating polarity concerns during PCB layout and assembly.
What is the maximum clamping voltage of P4SMA9.1CAHM3_A/H at rated surge current?
The maximum clamping voltage of P4SMA9.1CAHM3_A/H is 13.4 V, measured at its peak pulse current (IPPM) of 29.9 A under the standard 10/1000 µs waveform. This value ensures protected circuitry remains within safe operating limits during surge events, especially for 3.3 V and 5 V logic interfaces.
Does P4SMA9.1CAHM3_A/H require special handling for moisture sensitivity?
No - P4SMA9.1CAHM3_A/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be processed through standard lead-free reflow profiles with a peak temperature of 260 °C without baking or dry-pack requirements - simplifying manufacturing for high-mix automotive and industrial lines.
How does the temperature coefficient affect P4SMA9.1CAHM3_A/H performance?
The P4SMA9.1CAHM3_A/H has a VBR temperature coefficient of +0.068 %/°C, meaning its breakdown voltage increases by approximately 6.2 mV per °C rise in junction temperature. This predictable drift allows designers to maintain clamping margin across the full -65 °C to +150 °C operating range without derating penalties.
P4SMA9.1CAHM3_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):
- 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/H FAQ
1.How can I place an order for P4SMA9.1CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHM3_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 P4SMA9.1CAHM3_A/H reliable?
The price and inventory of P4SMA9.1CAHM3_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 P4SMA9.1CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHM3_A/H?
P4SMA9.1CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHM3_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 P4SMA9.1CAHM3_A/H?
For technical support, including P4SMA9.1CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA9.1CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHM3_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 P4SMA9.1CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHM3_A/H?
All P4SMA9.1CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHM3_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 P4SMA9.1CAHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CAHM3_A/H Tags
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