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Vishay General Semiconductor - Diodes Division P4SMA24CA-E3/61
- Part No.:
- P4SMA24CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CA-E3/61.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA24CA-E3/61 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 or power lines. It features a 24 V standoff voltage (VWM), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 12.0 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA24CA-E3/61 datasheet, P4SMA24CA-E3/61 pinout, P4SMA24CA-E3/61 application, or P4SMA24CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.38), AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
The P4SMA24CA-E3/61 operates as a symmetrical avalanche diode with identical forward and reverse clamping behavior, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Rated for repetitive 10/1000 µs surge events at 0.01% duty cycle, it delivers 400 W peak pulse power below 91 V and derates linearly above that threshold. Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C and operating range from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 22.8 V to 25.2 V at 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering within ±5% of nominal rating. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 12.0 A - Peak voltage seen by protected circuit during worst-case transient; enables robust 24 V rail protection. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Sustains high-energy surges common in inductive switching or ESD events without degradation. |
| ID (Reverse Leakage) | 1.0 µA at VWM - Negligible standby current; avoids signal distortion or power loss in high-impedance interfaces. |
| TJ max. | +150 °C - Supports operation in under-hood automotive or enclosed industrial environments without thermal shutdown. |
| 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, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; bidirectional symmetry means either terminal may serve as anode or cathode. |
| Cathode | Current exit terminal in forward bias | No marking on bidirectional devices; terminals are functionally interchangeable for transient suppression across AC or differential signals. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V bus lines without derating. |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes overvoltage stress on downstream ICs while maintaining margin above normal operating voltage. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| AEC-Q101 qualified (HE3 suffix variant) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Protection of gate drivers and feedback signal lines in 24 V DC motor drives exposed to inductive kickback from relay or solenoid switching. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients induced by coil de-energization, preventing latch-up or gate oxide damage in MOSFET drivers. Use Value: Limits transient voltage to ≤33.2 V, preserving functional integrity of 3.3 V/5 V logic interfaces tied to isolated analog sensing circuits. |
Use Scenario: Surge suppression on LIN bus or sensor supply lines (e.g., ambient temperature, rain/light sensors) in door modules and lighting control units. IC Role / Device Role / Timing Role: Fast-response clamping element placed at connector interface to absorb ISO 7637-2 pulse 1/2a/3a transients before reaching MCU or analog front-end. Use Value: Maintains signal fidelity with <1 µA leakage at 20.5 V, avoiding false triggers or offset errors in precision ADC measurements. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Input-stage protection for 24 V PoE-powered remote units (e.g., IP cameras, access points) subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line defense against common-mode transients entering via Ethernet magnetics or auxiliary DC input, shunting energy to ground before regulator stage. Use Value: Withstands 400 W pulses without parametric shift, ensuring long-term reliability in outdoor deployments with minimal board space. |
Use Scenario: ESD and load-dump protection on microcontroller I/O lines driving relays or triacs in washing machines, HVAC controllers, and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed directly at connector or switch node to suppress contact bounce and human-body-model ESD. Use Value: Prevents firmware lockup or reset glitches by limiting transient duration to sub-nanosecond response and holding clamped voltage below MCU absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Higher package thermal mass (SMB/DO-214AA); RθJA = 70 °C/W vs. 120 °C/W; same VWM/VC specs but 600 W PPPM rating. | Better suited for higher average power dissipation scenarios; requires larger PCB pad area (0.3" x 0.3") vs. SMA's 0.2" x 0.2". | Select SMBJ24CA when system-level surge repetition rate exceeds 0.01% duty cycle or ambient temperature exceeds 85 °C. |
| 1.5KE24CA | Through-hole DO-15 package; 1500 W PPPM; higher VBR tolerance (±10%) and slower response due to larger junction capacitance (~200 pF). | Used in legacy designs or where manual assembly is acceptable; not suitable for high-speed data lines due to higher capacitance. | Choose 1.5KE24CA only for cost-sensitive, non-automated production or where board real estate allows axial-leaded components. |
Compared with SMBJ24CA and 1.5KE24CA, the P4SMA24CA-E3/61 offers optimal balance of compact SMT footprint, AEC-Q101 qualification, and precise clamping for modern 24 V embedded systems - especially where board space, reflow compatibility, and automotive compliance are mandatory.
Availability
P4SMA24CA-E3/61 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, telecom power interface, and consumer appliance control board designs requiring stable component supply, RoHS-compliant sourcing, and traceable manufacturing lot data.
Supply support for P4SMA24CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and compatibility with automated SMT assembly processes.
FAQ
What is the clamping voltage of the P4SMA24CA-E3/61 at its rated peak pulse current?
The P4SMA24CA-E3/61 has a maximum clamping voltage (VC) of 33.2 V at 12.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and reflects worst-case voltage seen by protected circuitry during surge events - critical for verifying margin against downstream IC absolute maximum ratings. The P4SMA24CA-E3/61 maintains this clamping performance across its full operating temperature range.
Is the P4SMA24CA-E3/61 suitable for automotive applications?
Yes, the P4SMA24CA-E3/61 is RoHS-compliant and manufactured to commercial-grade specifications; however, the AEC-Q101 qualified version carries the HE3 suffix (e.g., P4SMA24CAHE3_A). While the P4SMA24CA-E3/61 shares identical electrical characteristics, only the HE3-suffixed variant undergoes full automotive qualification testing per JESD22. For non-safety-critical automotive body electronics, the P4SMA24CA-E3/61 may be used with customer validation; the P4SMA24CA-E3/61 itself is not AEC-Q101 certified.
What is the thermal resistance of the P4SMA24CA-E3/61, and how does it affect layout design?
The P4SMA24CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal. This value assumes minimal copper area and no internal plane connection. To improve thermal performance, designers should use larger thermal pads, connect to internal ground/power planes, or add thermal vias - especially in high-ambient or high-duty-cycle applications. The P4SMA24CA-E3/61's RθJL is 30 °C/W, indicating efficient heat conduction to PCB traces.
Does the P4SMA24CA-E3/61 have polarity markings, and how is it oriented on the PCB?
No, the P4SMA24CA-E3/61 is a bidirectional TVS diode and carries no polarity marking on its SMA (DO-214AC) package. Unlike unidirectional variants (e.g., P4SMA24A), which feature a cathode band, the CA-suffixed version is symmetrical - both terminals behave identically under reverse or forward bias. Therefore, orientation on the PCB is non-critical; either end may connect to line or ground depending on circuit topology. This simplifies layout and eliminates risk of incorrect placement during automated assembly of the P4SMA24CA-E3/61.
What is the maximum reverse leakage current of the P4SMA24CA-E3/61 at its standoff voltage?
The P4SMA24CA-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its standoff voltage (VWM) of 20.5 V, measured at TA = 25 °C. This ultra-low leakage ensures minimal impact on high-impedance signal paths, such as sensor bias networks or LIN bus termination, and avoids power budget violations in battery-operated systems. Leakage remains below 5 µA up to TJ = 125 °C, supporting stable operation in extended temperature environments for the P4SMA24CA-E3/61.
P4SMA24CA-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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P4SMA24CA-E3/61 FAQ
1.How can I place an order for P4SMA24CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CA-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 P4SMA24CA-E3/61 reliable?
The price and inventory of P4SMA24CA-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 P4SMA24CA-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA24CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CA-E3/61?
P4SMA24CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CA-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 P4SMA24CA-E3/61?
For technical support, including P4SMA24CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CA-E3/61 requirements.
6.How does Aetrix verify that P4SMA24CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA24CA-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 P4SMA24CA-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA24CA-E3/61?
All P4SMA24CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CA-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 P4SMA24CA-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA24CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA24CA-E3/61 Tags
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