My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA33CA-M3/5A
- Part No.:
- P4SMA33CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CA-M3/5A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,821
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA33CA-M3/5A 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 33 V standoff voltage (VWM), 36.7 V minimum breakdown voltage (VBR), 45.7 V maximum clamping voltage (VC) at 8.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA33CA-M3/5A datasheet, P4SMA33CA-M3/5A pinout, P4SMA33CA-M3/5A application, or P4SMA33CA-M3/5A equivalent, key selection criteria include bidirectional clamping performance, low clamping ratio (VC/VBR ≈ 1.25), halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification readiness, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The P4SMA33CA-M3/5A operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while its low incremental surge resistance enables effective energy diversion during ESD or inductive switching events.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = +150 °C. Derating applies above TA = 25 °C per Fig. 2, and peak pulse ratings assume mounting on 0.2" × 0.2" copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 33 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 36.7 V min / 40.7 V max at IT = 1 mA - Ensures predictable, repeatable avalanche onset under transient stress. |
| VC (Clamping Voltage) | 45.7 V max at IPPM = 8.8 A - Limits voltage seen by protected circuitry during 10/1000 µs surge; clamping ratio = 1.25. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs transients; derates to 300 W for devices ≥91 V, but not applicable here. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Minimizes standby power loss and avoids false triggering in low-current signal paths. |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with standard reflow profiles; MSL Level 1, peak solder temp 260 °C. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; bidirectional construction - no cathode/anode marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | One terminal of symmetrical avalanche junction; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Anode | Transient return path (bidirectional) | Second terminal - identical function to first; forms two-terminal, polarity-agnostic clamp across differential or single-ended lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or differential signal lines (e.g., USB D+/D−, RS-485) without polarity concerns. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when properly laid out on 5 mm × 5 mm copper pads. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for consumer, industrial, and automotive end equipment without compromising reliability. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions support automotive-grade qualification; P4SMA33CA-M3/5A shares identical electrical specs and layout. |
| Low clamping ratio (VC/VBR ≈ 1.25) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
Applications
| Automotive Sensor Signal Protection | Industrial RS-485 Communication Lines |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor output and ground to shunt transients before they reach ADC input or signal conditioning amplifier. Use Value: Maintains signal integrity under 100 V/10 ms load dump events; clamps to ≤45.7 V, preserving 12-bit ADC accuracy and preventing latch-up. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subject to cable-induced lightning surges and EFT bursts. IC Role / Device Role / Timing Role: Connected between A/B differential pair and ground to suppress common-mode transients while preserving signal swing and timing margins. Use Value: Withstands 4 kV IEC 61000-4-5 surges without degradation; low capacitance (<100 pF at VWM) avoids data rate limitation at 10 Mbps. |
| Consumer USB Port ESD Protection | Power Supply Input Surge Clamping |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines in set-top boxes and smart displays, downstream of primary TVS arrays. IC Role / Device Role / Timing Role: Bidirectional clamp across D+ and D− to absorb ±15 kV contact ESD (IEC 61000-4-2) without forward conduction during normal signaling. Use Value: Sub-1 ns response ensures clamping before ESD pulse couples into PHY; 1 µA leakage preserves bus termination integrity. |
Use Scenario: Input-stage transient suppression on 24 V DC power rails feeding motor drivers or LED drivers in commercial lighting systems. IC Role / Device Role / Timing Role: Placed between VIN and GND to clamp inductive kickback from relay coils or solenoid loads. Use Value: 400 W rating handles repetitive 100 A/10 µs spikes; thermal resistance allows sustained operation at 50 °C ambient with minimal derating. |
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 | Same VWM (33 V), higher PPPM (600 W), larger SMB (DO-214AA) package (4.58 mm × 3.94 mm vs. SMA's 4.50 mm × 2.79 mm). | Better suited for higher-energy surges but requires larger PCB area and different pad layout. | Select SMBJ33CA only if system-level surge testing exceeds 400 W or layout allows larger footprint. |
| 1.5KE33CA | Same VWM (33 V), higher PPPM (1500 W), axial-leaded DO-15 package - not surface-mountable. | Requires through-hole assembly and manual soldering; incompatible with automated SMT lines. | Choose 1.5KE33CA only for prototyping or legacy through-hole designs where rework tolerance outweighs production efficiency. |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CA-M3/5A delivers optimal balance of compact SMT footprint, 400 W surge handling, and halogen-free compliance - making it preferred for space-constrained, high-volume industrial and automotive modules requiring automated assembly.
Availability
P4SMA33CA-M3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply designs requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified alternatives.
Supply support for P4SMA33CA-M3/5A 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 optimization.
The P4SMA series was developed for robust, cost-effective transient suppression in high-volume surface-mount applications - targeting automotive, industrial, and communications systems where board space, thermal performance, and compliance are critical.
FAQ
What does the "CA" suffix indicate in P4SMA33CA-M3/5A?
The "CA" suffix denotes a bidirectional configuration - meaning the P4SMA33CA-M3/5A provides symmetrical clamping in both polarities, with no anode/cathode distinction. This makes it ideal for protecting AC-coupled or differential signal lines like RS-485, CAN, or USB, unlike unidirectional "A" variants that require correct polarity orientation during placement.
Is P4SMA33CA-M3/5A suitable for automotive applications?
Yes - the P4SMA33CA-M3/5A meets halogen-free and RoHS requirements, and its base design supports AEC-Q101 qualification via the HM3 suffix (e.g., P4SMA33CAHM3_A/I). While the M3/5A variant itself is commercial-grade, its identical electrical and thermal specs allow direct drop-in use in automotive designs pending qualification validation by the end customer.
What is the maximum clamping voltage of P4SMA33CA-M3/5A under surge conditions?
The P4SMA33CA-M3/5A has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value ensures protected circuits experience less than 46 V during worst-case transients - critical for safeguarding 3.3 V or 5 V logic interfaces and analog front-ends.
How does the SMA (DO-214AC) package of P4SMA33CA-M3/5A compare to SMB or SMC packages?
The SMA package of P4SMA33CA-M3/5A measures 4.50 mm × 2.79 mm - smaller than SMB (DO-214AA, 4.58 mm × 3.94 mm) and significantly smaller than SMC (DO-214AB, 7.11 mm × 6.22 mm). This enables tighter routing in dense layouts, though thermal dissipation is lower than larger packages; PCB pad design must follow Vishay's 5 mm × 5 mm copper recommendation to sustain 400 W ratings.
Does P4SMA33CA-M3/5A require special handling or storage conditions?
No - the P4SMA33CA-M3/5A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and withstands peak reflow temperatures up to 260 °C. No baking or dry-pack storage is required, simplifying SMT line integration and reducing manufacturing overhead versus moisture-sensitive components.
P4SMA33CA-M3/5A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA33CA-M3/5A FAQ
1.How can I place an order for P4SMA33CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CA-M3/5A 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 P4SMA33CA-M3/5A reliable?
The price and inventory of P4SMA33CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CA-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA33CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CA-M3/5A?
P4SMA33CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CA-M3/5A 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 P4SMA33CA-M3/5A?
For technical support, including P4SMA33CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CA-M3/5A requirements.
6.How does Aetrix verify that P4SMA33CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA33CA-M3/5A 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 P4SMA33CA-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA33CA-M3/5A?
All P4SMA33CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CA-M3/5A, 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 P4SMA33CA-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA33CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33CA-M3/5A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
