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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHE3_A/H
- Part No.:
- P4SMA9.1CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHE3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,683
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Product details
Overview
P4SMA9.1CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V maximum clamping voltage (VC) at 29.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and ICs in automotive and industrial control systems.
For engineers reviewing the P4SMA9.1CAHE3_A/H datasheet, P4SMA9.1CAHE3_A/H pinout, P4SMA9.1CAHE3_A/H application, or P4SMA9.1CAHE3_A/H equivalent, this device delivers AEC-Q101 qualification, bidirectional surge suppression, low clamping ratio (VC/VBR ≈ 1.47), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin terminations - critical for automotive-grade ESD and load-dump protection design validation.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
Rated for TJ = –65 °C to +150 °C operation, it achieves 3.3 W steady-state power dissipation on infinite heatsink at 50 °C ambient and exhibits 0.068 %/°C temperature coefficient of VBR, ensuring predictable voltage threshold drift over temperature in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise breakdown onset for reliable transient detection |
| VWM | 7.78 V - maximum continuous working voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 29.9 A - clamping voltage limiting downstream component stress during surge |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capacity without failure |
| IPPM | 29.9 A - maximum non-repetitive surge current the device safely conducts |
| TJ max. | +150 °C - junction temperature limit enabling use in under-hood automotive locations |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either polarity) | One terminal of bidirectional PN junction - accepts surge current regardless of voltage polarity |
| Cathode | Transient current exit (either polarity) | Second terminal of bidirectional PN junction - completes conduction path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/5a surges in automotive ECUs without derating below 91 V |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning or baking |
| Glass passivated junction | Ensures stable leakage performance and robust surge endurance over 1000+ transient events |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient voltages before they reach precision ADC inputs or op-amp front-ends. Use Value: Maintains signal integrity by limiting voltage excursions to ≤13.4 V while surviving >1000 ISO 16750-2 pulses at 12 V system level. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair against ESD (IEC 61000-4-2 ±15 kV) and EFT (IEC 61000-4-4 ±2 kV) in factory automation nodes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at connector to shunt fast transients before bus transceiver input. Use Value: Prevents CAN controller latch-up or damage with <1 ns response and no data distortion due to symmetric VC behavior. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Protection |
|
Use Scenario: Secondary-side DC output protection in wall adapters subjected to lightning-induced surges on connected USB or Ethernet ports. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing residual transients that bypass primary-side MOVs and Y-capacitors. Use Value: Provides secondary-level coordination with upstream protection, clamping to 13.4 V before downstream LDOs or USB-PD controllers exceed absolute max ratings. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from induced surges on outdoor copper pairs in telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional suppressor mounted at line interface IC pins to clamp common-mode and differential transients simultaneously. Use Value: Enables compliance with ITU-T K.20/K.21 immunity requirements using a single discrete device instead of dual unidirectional TVS array. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Higher VBR (8.5–9.4 V), same VC (14.5 V), SMB package (larger footprint, higher thermal mass) | Preferred where board space allows larger pad layout and higher IPPM (32.2 A) is needed | Select when thermal derating margin >20% required or legacy SMB layout exists |
| 1.5KE9.1CA | Through-hole DO-201 package, same VBR/VC, 1500 W PPPM, lower VWM (7.75 V) | Used in high-energy industrial power supplies where manual assembly or wave soldering applies | Choose only for through-hole designs needing higher surge rating; not SMT-compatible |
Compared with P4SMA9.1CAHE3_A/H, SMBJ9.0CA offers greater surge current headroom in a larger package, while 1.5KE9.1CA provides higher peak power but requires PCB redesign - making P4SMA9.1CAHE3_A/H optimal for space-constrained, AEC-Q101-compliant SMT deployments.
Availability
P4SMA9.1CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA9.1CAHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - delivering AEC-Q101 qualified, surface-mount TVS solutions with consistent clamping and low-profile packaging.
FAQ
What does the "CA" suffix mean in P4SMA9.1CAHE3_A/H?
The "CA" suffix in P4SMA9.1CAHE3_A/H denotes a bidirectional configuration - meaning the device functions identically in both polarities, with matched breakdown and clamping characteristics for AC or floating signal line protection. This distinguishes it from unidirectional variants (e.g., P4SMA9.1A), which require correct cathode orientation during placement. P4SMA9.1CAHE3_A/H has no polarity marking and supports symmetrical surge suppression without circuit redesign.
Is P4SMA9.1CAHE3_A/H suitable for automotive applications?
Yes, P4SMA9.1CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensors. Its qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22-A114. The HE3 suffix confirms RoHS compliance and automotive-grade screening, making P4SMA9.1CAHE3_A/H appropriate for under-hood and cabin applications up to +125 °C ambient.
What is the clamping voltage of P4SMA9.1CAHE3_A/H at rated surge current?
The maximum clamping voltage (VC) of P4SMA9.1CAHE3_A/H is 13.4 V at its rated peak pulse current (IPPM) of 29.9 A, measured with a 10/1000 µs waveform. This value reflects worst-case device behavior under standardized surge conditions and ensures downstream components like 3.3 V or 5 V logic ICs remain within safe operating limits when P4SMA9.1CAHE3_A/H activates.
How does the "HE3" in P4SMA9.1CAHE3_A/H differ from "E3" or "M3"?
The "HE3" suffix in P4SMA9.1CAHE3_A/H indicates RoHS-compliant construction with AEC-Q101 qualification, whereas "E3" denotes RoHS-compliant commercial grade only, and "M3" adds halogen-free material compliance. The "H" prefix in HE3 explicitly signals automotive qualification, verified through extended reliability testing beyond standard commercial requirements - a distinction critical for P4SMA9.1CAHE3_A/H deployment in safety-relevant vehicle subsystems.
What is the thermal resistance of P4SMA9.1CAHE3_A/H, and how does it affect layout?
P4SMA9.1CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2" per terminal). This value implies significant self-heating during sustained power dissipation; therefore, layout must include adequate copper area and thermal vias if operating near its 3.3 W steady-state limit. For intermittent surge handling, thermal design focuses more on transient impedance than steady-state cooling - confirming P4SMA9.1CAHE3_A/H's suitability for short-duration transients even in compact layouts.
P4SMA9.1CAHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1CAHE3_A/H FAQ
1.How can I place an order for P4SMA9.1CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/H reliable?
The price and inventory of P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHE3_A/H?
P4SMA9.1CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/H?
For technical support, including P4SMA9.1CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA9.1CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHE3_A/H?
All P4SMA9.1CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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