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Vishay General Semiconductor - Diodes Division P4SMA33CA-E3/61
- Part No.:
- P4SMA33CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CA-E3/61.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,345
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Product details
Overview
P4SMA33CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) designed for clamping inductive and lightning-induced transients across 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, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and communication ICs in industrial and automotive electronics.
For engineers reviewing the P4SMA33CA-E3/61 datasheet, P4SMA33CA-E3/61 pinout, P4SMA33CA-E3/61 application, or P4SMA33CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compliance with UL 497B surge protector standards.
Technical Context
The P4SMA33CA-E3/61 operates as a bidirectional avalanche diode, delivering symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), enabling effective suppression of ESD and switching surges before sensitive downstream circuitry is damaged.
Rated for 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity, it supports reflow soldering up to 260 °C peak. With 3.3 W steady-state power dissipation and low incremental surge resistance, it maintains consistent clamping performance under repetitive transient stress in unregulated DC bus and sensor line protection roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 8.8 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for I/O voltage tolerance matching. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per single 10/1000 μs transient; sufficient for IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Negligible standby current; avoids loading on high-impedance sensor or reference lines. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; requires minimal PCB copper area (0.2" × 0.2") for rated power handling. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no cathode/anode marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of polarity applied across device. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns. |
| 400 W peak pulse power (10/1000 μs) | Supports robust surge immunity in industrial control inputs and automotive body electronics per ISO 7637-2. |
| Low-profile SMA package | 0.208" × 0.157" footprint with 0.090" height - compatible with automated SMT placement and space-constrained PCB layouts. |
| UL 497B recognized (QVGQ2) | Validated surge protector classification for telecom and data line applications requiring safety agency approval. |
| Matte tin-plated leads | Ensures reliable solderability per J-STD-002 and JESD 22-B102; passes JESD 201 Class 2 whisker resistance test. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to limit transient voltage before reaching PHY or ADC input. Use Value: Prevents latch-up or permanent damage to transceiver ICs during ISO 7637-2 Pulse 1/2a/5a events; AEC-Q101 qualification ensures long-term field reliability. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced surges from relay coil de-energization or nearby motor drives. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input channels, mounted adjacent to terminal block. Use Value: Limits clamped voltage to ≤45.7 V, well below typical 30 V absolute maximum ratings of optocoupler input stages and Schmitt-trigger receivers. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Surge protection on RS-485/RS-232 data lines in networked building automation equipment exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between differential pair and transceiver IC, referenced to local ground plane. Use Value: UL 497B recognition confirms suitability for safety-critical telecom infrastructure; low capacitance preserves signal integrity up to 1 Mbps. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-the-line TVS connected across motor terminals to absorb back-EMF during PWM switching transitions. Use Value: 400 W peak power rating handles repetitive 10/1000 μs surges from motor inductance; RoHS-compliant E3 suffix meets global environmental compliance requirements. |
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/VBR/VC specs but SMB (DO-214AA) package - 20 % larger footprint and 10 % higher RθJA (140 °C/W). | Preferred where board space allows larger pad layout and higher thermal mass is needed for sustained surge duty cycles. | Select SMBJ33CA only if PCB layout accommodates 0.260" × 0.175" footprint and thermal derating above 85 °C ambient is required. |
| 1.5KE33CA | Through-hole DO-201 package; same electrical specs but 1500 W peak power rating and higher junction capacitance (>100 pF). | Used in legacy designs or high-energy surge environments where PCB through-hole mounting and mechanical robustness are prioritized. | Choose 1.5KE33CA only for prototyping, repair, or applications requiring >1 kW surge handling - not suitable for high-speed data lines due to capacitance. |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CA-E3/61 delivers optimal balance of compact size, automotive qualification, and controlled clamping for modern SMT-based industrial and automotive electronics - without sacrificing surge rating or safety certification.
Availability
P4SMA33CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line protection, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for P4SMA33CA-E3/61 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, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - engineered for automated assembly, AEC-Q101 compliance, and UL-recognized safety performance.
FAQ
What is the clamping voltage of the P4SMA33CA-E3/61 under standard surge conditions?
The P4SMA33CA-E3/61 has a maximum clamping voltage (VC) of 45.7 V when subjected to an 8.8 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during such a transient event. The P4SMA33CA-E3/61 maintains this clamping performance consistently across its operational temperature range of -65 °C to +150 °C.
Is the P4SMA33CA-E3/61 suitable for automotive applications?
Yes, the P4SMA33CA-E3/61 is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade ordering codes (HE3/HM3 variants). While the E3/61 suffix denotes commercial-grade RoHS compliance, its underlying die and construction meet AEC-Q101 stress test requirements including HTGB, TCT, and ESD. For production automotive use, specify P4SMA33CAHE3_A or P4SMA33CAHM3_A - the P4SMA33CA-E3/61 shares identical electrical and thermal characteristics.
Does the P4SMA33CA-E3/61 have polarity markings?
No, the P4SMA33CA-E3/61 is a bidirectional TVS diode and carries no polarity marking on its SMA (DO-214AC) package. Its symmetrical construction means either terminal may be connected to line or ground - clamping occurs identically for positive or negative transients. This eliminates orientation errors during automated placement and simplifies layout for differential or floating signal paths.
What is the thermal resistance and how does it affect PCB layout for the P4SMA33CA-E3/61?
The P4SMA33CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To sustain its 400 W peak pulse rating without thermal runaway, PCB layout must provide at least this minimum copper area. Reducing pad size increases RθJA and requires derating of surge capability - refer to Figure 2 in Vishay document 88367 for precise derating curves versus temperature.
How does the P4SMA33CA-E3/61 compare to unidirectional versions like P4SMA33A-E3/61?
The P4SMA33CA-E3/61 differs from the unidirectional P4SMA33A-E3/61 solely in polarity configuration: "CA" denotes bidirectional operation with symmetrical clamping, while "A" indicates unidirectional with cathode band marking. Both share identical VWM (33 V), VBR (31.4–34.7 V), VC (45.7 V), and PPPM (400 W). Choose P4SMA33CA-E3/61 for AC, differential, or floating circuits; choose P4SMA33A-E3/61 only when DC-biased lines require asymmetric protection with defined forward conduction path.
P4SMA33CA-E3/61 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-E3/61 FAQ
1.How can I place an order for P4SMA33CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CA-E3/61 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-E3/61 reliable?
The price and inventory of P4SMA33CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CA-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA33CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CA-E3/61?
P4SMA33CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CA-E3/61 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-E3/61?
For technical support, including P4SMA33CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CA-E3/61 requirements.
6.How does Aetrix verify that P4SMA33CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA33CA-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA33CA-E3/61?
All P4SMA33CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CA-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA33CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33CA-E3/61 Tags
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