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Vishay General Semiconductor - Diodes Division P4SMA33CAHE3_A/I
- Part No.:
- P4SMA33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CAHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,244
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Product details
Overview
P4SMA33CAHE3_A/I 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 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 400 W peak pulse power (10/1000 µs), 45.7 V maximum clamping voltage at rated surge current, and AEC-Q101 qualification for automotive applications - used to protect MOSFETs, sensor interfaces, and communication lines in harsh environments.
For engineers reviewing the P4SMA33CAHE3_A/I datasheet, P4SMA33CAHE3_A/I pinout, P4SMA33CAHE3_A/I application, or P4SMA33CAHE3_A/I equivalent, key selection considerations include bidirectional clamping capability, SMA (DO-214AC) package compatibility with automated SMT assembly, low incremental surge resistance, and compliance with UL 497B and AEC-Q101 for automotive-grade reliability.
Technical Context
The P4SMA33CAHE3_A/I operates as a bidirectional avalanche diode, providing symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
It delivers 400 W peak pulse power at 25 °C with derating above TA = 25 °C per Fig. 2, and maintains clamping performance under repetitive 0.01% duty cycle conditions. Thermal resistance is RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), supporting operation up to TJ = +150 °C with appropriate PCB copper pad layout (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 31.4–34.7 V at 1 mA - defines precise clamping onset threshold for transient suppression |
| Stand-off Voltage VWM | 28.2 V - maximum continuous reverse working voltage before leakage rises significantly |
| Maximum Clamping Voltage VC | 45.7 V at IPPM = 8.8 A - limits peak voltage seen by protected circuit during surge |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - determines energy-handling capacity for common surge standards |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pads |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements (temperature cycling, HTRB, etc.) |
| UL Recognition | QVGQ2 under UL 497B - certified for use in telecom and industrial protector applications |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are functionally symmetric; device mounts with either end connected to line or ground depending on circuit topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path to ground or reference during positive or negative overvoltage events |
| Cathode | Transient return path (bidirectional) | Functionally identical to Anode; no polarity distinction - enables symmetrical clamping in AC or floating circuits |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity testing (4 kV line-to-line) with margin |
| Low incremental surge resistance | Minimizes VC – VBR differential, improving protection margin for sensitive downstream ICs |
| MSL Level 1 (J-STD-020) | Enables standard reflow soldering without pre-baking; compatible with high-volume automated assembly |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| RoHS-compliant & halogen-free option available | Meets environmental compliance requirements for automotive and industrial end equipment |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor signal and ground to clamp transients before they reach ADC input or signal conditioner. Use Value: Maintains signal integrity under 100 V/100 ms load dump events while adding <1 pF capacitance to avoid bandwidth degradation. |
Use Scenario: Safeguarding CANH/CANL differential pair in vehicle body control modules against ESD and coupled surges. IC Role / Device Role / Timing Role: One P4SMA33CAHE3_A/I per line (CANH–GND, CANL–GND) to limit common-mode overvoltage without distorting 1 Mbps data timing. Use Value: Clamps to ≤45.7 V within nanoseconds, preserving CAN physical layer compliance and preventing transceiver latch-up. |
| Telecom DSL Line Surge Protection | Consumer Appliance Motor Drive Feedback Protection |
Use Scenario: Shielding ADSL/VDSL line interface ICs from lightning-induced surges entering via telephone wiring. IC Role / Device Role / Timing Role: Placed between line transformer secondary and codec IC to absorb >1 kV/0.5 µs transients per ITU-T K.20/K.21. Use Value: Handles 400 W peak power without degradation, meeting UL 497B protector classification for telecom infrastructure. |
Use Scenario: Protecting hall-effect position feedback signals in BLDC motor drives from commutation noise and inductive kickback. IC Role / Device Role / Timing Role: Mounted at motor controller PCB edge to shunt transients induced by MOSFET switching edges (dV/dt > 50 V/ns). Use Value: Fast response (<1 ns) and low clamping voltage prevent false triggering of position decoding logic in real-time control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher PPPM = 600 W; larger SMB (DO-214AA) package; same VBR range and AEC-Q101 qualification | Better suited for higher-energy surges; requires larger PCB footprint and different thermal pad layout | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when board space allows larger package |
| 1.5SMC33CA | Same VBR/VC; PPPM = 1500 W; SMC (DO-214AB) package; not AEC-Q101 qualified | Offers highest energy handling but lacks automotive qualification and has higher junction capacitance (~100 pF) | Prefer for industrial power supply inputs where AEC-Q101 is not required and PCB space permits SMC footprint |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA33CAHE3_A/I provides optimal balance of AEC-Q101 compliance, compact SMA footprint, and sufficient 400 W surge rating for signal-line protection - making it ideal for space-constrained automotive and telecom modules where qualification and layout efficiency are critical.
Availability
P4SMA33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor systems, industrial CAN networks, telecom line interfaces, and consumer appliance motor controls requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA33CAHE3_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, and protection devices with emphasis on reliability, precision, and application-specific qualification.
The P4SMA Series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom applications - prioritizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature and lifetime.
FAQ
What is the exact breakdown voltage range for P4SMA33CAHE3_A/I?
The P4SMA33CAHE3_A/I has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at a test current of 1 mA, measured per ANSI/IEEE C62.35. This range ensures reliable and repeatable clamping onset across production lots and operating temperatures, directly supporting design margin calculations for protected circuits.
Is P4SMA33CAHE3_A/I suitable for automotive applications?
Yes, P4SMA33CAHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix indicating automotive-grade qualification. It meets stress test requirements including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock - making it approved for use in engine control units, body electronics, and ADAS sensor modules.
What does the "CA" suffix mean in P4SMA33CAHE3_A/I?
The "CA" suffix in P4SMA33CAHE3_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., P4SMA33A), it has no cathode band marking and functions identically in either orientation.
What is the maximum clamping voltage of P4SMA33CAHE3_A/I under surge conditions?
The P4SMA33CAHE3_A/I clamps to a maximum of 45.7 V at its rated peak pulse current (IPPM = 8.8 A) using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 5.0 mm × 5.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
Does P4SMA33CAHE3_A/I require special PCB layout considerations?
Yes - to achieve rated 400 W pulse power, P4SMA33CAHE3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's thermal guidelines. Smaller pads reduce heat dissipation and cause premature failure under repeated surges; thermal vias to inner ground planes are recommended for sustained duty cycles.
P4SMA33CAHE3_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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
P4SMA33CAHE3_A/I FAQ
1.How can I place an order for P4SMA33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CAHE3_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 P4SMA33CAHE3_A/I reliable?
The price and inventory of P4SMA33CAHE3_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 P4SMA33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CAHE3_A/I?
P4SMA33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CAHE3_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 P4SMA33CAHE3_A/I?
For technical support, including P4SMA33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA33CAHE3_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 P4SMA33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA33CAHE3_A/I?
All P4SMA33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CAHE3_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 P4SMA33CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33CAHE3_A/I Tags
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