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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHE3_A/I
- Part No.:
- P4SMA9.1CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHE3_A/I.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,525
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Product details
Overview
P4SMA9.1CAHE3_A/I 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 9.1 V breakdown voltage (VBR min/max = 8.65–9.55 V at 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/I datasheet, P4SMA9.1CAHE3_A/I pinout, P4SMA9.1CAHE3_A/I application, or P4SMA9.1CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.47), thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with no polarity marking on the device body. Its glass-passivated junction enables fast response (<1 ns) to ESD and surge events while maintaining low incremental surge resistance and stable clamping performance across -65 °C to +150 °C operating junction temperature range.
The device meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and revision code "A" in the ordering code P4SMA9.1CAHE3_A/I.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.65–9.55 V at 1.0 mA test current - defines reliable conduction onset under transient stress |
| Stand-off Voltage VWM | 7.78 V - maximum continuous reverse working voltage before leakage exceeds 50 µA |
| Clamping Voltage VC | 13.4 V at 29.9 A IPPM (10/1000 µs) - limits downstream voltage during surge |
| Peak Pulse Power PPPM | 400 W - sustains single high-energy transients without failure when mounted on 5.0 mm × 5.0 mm copper pads |
| Junction Temperature Range | -65 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.54 mm lead pitch and RoHS-compliant matte tin plating |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with two coplanar terminals; no polarity marking for bidirectional configuration; terminals are matte tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminal behavior in both directions - no cathode band; interchangeable connection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or differential signal lines without polarity concerns |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on properly laid out PCBs |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Allows direct placement into standard lead-free reflow profiles without dry-pack handling |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output pins of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground lines to limit transients to safe levels. Use Value: Prevents latch-up or permanent damage to 5 V rail-connected analog front-end ICs during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding CANH/CANL differential pair in factory automation PLCs against EFT and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Low-capacitance TVS connected line-to-line and line-to-ground to absorb common-mode and differential transients. Use Value: Maintains CAN signal integrity below 13.4 V clamping threshold while supporting >1 Mbps data rates due to minimal parasitic capacitance. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level protection on USB 2.0 D+/D- lines in set-top boxes subjected to IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after connector to shunt ESD current before reaching PHY IC. Use Value: Clamps sub-ns ESD events to <13.4 V within nanoseconds, preventing PHY latch-up and ensuring plug-and-play robustness. |
Use Scenario: Primary surge protection on twisted-pair DSL lines entering residential gateways, exposed to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging tip/ring lines to ground, absorbing up to 400 W 10/1000 µs surges. Use Value: Limits induced line voltage to ≤13.4 V during 1 kV/500 A surges, preserving ADSL2+ signal fidelity and modem uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | 600 W PPPM, SMB package (larger footprint, RθJA = 100 °C/W), same VBR range | Higher power handling but requires larger PCB area; better thermal margin in high-duty-cycle scenarios | Select when system-level surge testing exceeds 400 W or board layout allows SMB footprint |
| 1.5SMC9.0CA | 1500 W PPPM, SMC package (DO-214AB), higher VC = 14.4 V at 103 A | Designed for primary-level telecom surge protection; less precise clamping for sensitive ICs | Choose for front-end AC/DC input stages where higher energy absorption outweighs tighter clamping needs |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the P4SMA9.1CAHE3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and tight 13.4 V clamping - making it preferred for space-constrained automotive and industrial signal-line protection where precision voltage limiting is critical.
Availability
P4SMA9.1CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and telecom DSL line protection requiring stable component supply and long-term lifecycle support.
Supply support for P4SMA9.1CAHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, automotive qualification, and application-specific performance.
The P4SMA Series targets cost-sensitive yet robust transient protection in automotive, industrial, and consumer electronics - delivering AEC-Q101 qualified TVS performance in the compact SMA package for automated SMT manufacturing.
FAQ
What does the "CA" suffix mean in P4SMA9.1CAHE3_A/I?
The "CA" suffix in P4SMA9.1CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical electrical characteristics forward and reverse. This eliminates polarity concerns during PCB layout and enables use on AC-coupled or differential signal lines such as CAN, RS-485, or audio paths. The P4SMA9.1CAHE3_A/I has no cathode band marking, confirming its bidirectional nature per Vishay's documentation.
Is P4SMA9.1CAHE3_A/I qualified for automotive applications?
Yes, P4SMA9.1CAHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and revision code "A" in the part number. It undergoes stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT) per AEC-Q101 requirements. This qualification makes P4SMA9.1CAHE3_A/I suitable for automotive powertrain, body control, and ADAS sensor interface applications where reliability under harsh environmental conditions is mandatory.
What is the clamping voltage of P4SMA9.1CAHE3_A/I at rated peak pulse current?
The P4SMA9.1CAHE3_A/I has a maximum clamping voltage (VC) of 13.4 V at 29.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Vishay's test condition. The low clamping ratio (VC/VBR ≈ 1.47) ensures effective protection of 5 V and 3.3 V logic circuits without excessive overvoltage stress.
Does P4SMA9.1CAHE3_A/I require special PCB layout considerations?
Yes - to achieve the rated 400 W peak pulse power, P4SMA9.1CAHE3_A/I must be mounted on minimum recommended copper pad areas: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in Vishay's datasheet Figure 1. Smaller pads reduce thermal dissipation and derate pulse power capability. Additionally, short, wide traces between the P4SMA9.1CAHE3_A/I and protected node minimize inductance, preserving fast clamping response. No thermal vias are required due to its MSL Level 1 rating and low RθJA = 120 °C/W.
How does the "HE3" and "_A/I" in P4SMA9.1CAHE3_A/I affect compliance and packaging?
The "HE3" suffix in P4SMA9.1CAHE3_A/I indicates RoHS-compliant construction with AEC-Q101 qualification, while "_A/I" specifies revision "A" and tape-and-reel delivery in 13" diameter reels (7500 units per reel). This packaging format supports high-volume automated SMT placement. The HE3 variant also meets JESD 201 Class 2 whisker resistance and uses matte tin-plated leads compliant with J-STD-002 - ensuring long-term solderability and intermetallic stability in production environments.
P4SMA9.1CAHE3_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:
- -
- 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/I FAQ
1.How can I place an order for P4SMA9.1CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/I reliable?
The price and inventory of P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHE3_A/I?
P4SMA9.1CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/I?
For technical support, including P4SMA9.1CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA9.1CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHE3_A/I?
All P4SMA9.1CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHE3_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 P4SMA9.1CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CAHE3_A/I Tags
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Diodes Incorporated
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