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Vishay General Semiconductor - Diodes Division P4SMA24CA-M3/61
- Part No.:
- P4SMA24CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CA-M3/61.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
P4SMA24CA-M3/61 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 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 - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line receivers.
For engineers reviewing the P4SMA24CA-M3/61 datasheet, P4SMA24CA-M3/61 pinout, P4SMA24CA-M3/61 application, or P4SMA24CA-M3/61 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, SMA (DO-214AC) package constraints, thermal derating curves, and AEC-Q101-compliant alternatives for robust ESD/surge design validation.
Technical Context
The P4SMA24CA-M3/61 operates as a symmetrical bidirectional TVS diode with identical forward and reverse clamping characteristics - no polarity marking required. Its glass-passivated junction enables sub-nanosecond response to transients, while low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C and MSL Level 1 moisture sensitivity. The device is halogen-free and RoHS-compliant (M3 suffix), qualified per AEC-Q101 for automotive use when ordered with HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8 V to 25.2 V at 1.0 mA - Voltage at which device transitions from high-impedance to low-impedance conduction; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 33.2 V at 12.0 A IPPM - Maximum voltage seen by protected circuit during 10/1000 µs surge; directly limits stress on downstream ICs like microcontrollers or RS-485 transceivers. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; supports protection against IEC 61000-4-5 Level 3 surges (1 kV/42 Ω). |
| ID (Reverse Leakage) | 1.0 µA at VWM - Ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes and low-power IoT endpoints. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal shutdown. |
| Package | SMA (DO-214AC) - Standardized surface-mount footprint compatible with automated placement; 0.208" × 0.157" body with matte tin-plated leads solderable per J-STD-002. |
Pinout & Package
SMA (DO-214AC) package: two-terminal, bidirectional device with no polarity marking. Cathode/anode designation does not apply; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output path for transient energy; no DC polarity dependency - suitable for AC-coupled lines and differential buses. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables placement across any two points requiring bidirectional overvoltage suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for orientation-aware layout in differential signal paths (e.g., CAN, RS-485, USB D+/D−). |
| 400 W peak pulse power | Withstands 10/1000 µs surges up to 12.0 A - meets IEC 61000-4-5 surge immunity requirements for industrial control and telecom infrastructure. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces without additional series impedance. |
| AEC-Q101 qualification option | HM3 variant available - validated for automotive applications including engine control modules, ADAS sensor hubs, and infotainment power rails. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports standard lead-free assembly without pre-baking or special handling. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject 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 reaching ADC input or signal conditioner. Use Value: Limits voltage excursion to ≤33.2 V during 100 A load dump events, preventing latch-up or permanent damage to 24 V-rated signal chain components. |
Use Scenario: Safeguarding RS-485 transceiver bus pins (A/B) against ESD and lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Symmetrical TVS connected between differential pair and ground to suppress common-mode transients without distorting signal integrity. Use Value: Maintains <1 ns response time and <1 pF junction capacitance at VWM - avoids data corruption at 10 Mbps baud rates while meeting IEC 61000-4-2 Level 4 (15 kV air). |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Adding secondary surge protection on USB 2.0 VBUS and data lines in portable docking stations exposed to hot-plug transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on VBUS rail and D+/D− differential pair to clamp both common- and differential-mode surges. Use Value: 20.5 V VWM allows full 5 V USB operation while clamping 1 kV/500 Ω surges to <33.2 V - prevents damage to USB controller and PHY without affecting enumeration. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers subjected to longitudinal surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed between tip/ring and ground to absorb asymmetric lightning-induced energy entering via copper loop. Use Value: 400 W PPPM rating sustains repeated 10/1000 µs surges up to 1000 V - extends service life of line driver amplifiers and reduces field failure rates in outdoor DSLAM cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Higher PPPM (600 W), larger SMB (DO-214AA) package, higher RθJA (90 °C/W), same VWM/VC specs. | Better suited for higher-energy surges but requires larger PCB area and different thermal pad layout. | Select when system-level surge testing exceeds IEC 61000-4-5 Level 3 and board space permits 2.5 mm taller profile. |
| 1.5KE24CA | Through-hole DO-15 package, 1500 W PPPM, higher VC (38.9 V), slower response due to higher junction capacitance. | Legacy replacement for through-hole designs; not suitable for high-speed data lines due to ~100 pF capacitance. | Choose only for cost-sensitive, non-high-speed applications where manual assembly or repairability is prioritized over miniaturization. |
Compared with P4SMA24CA-M3/61, SMBJ24CA offers greater surge margin in a slightly larger SMT package, while 1.5KE24CA trades miniaturization and speed for raw power handling and through-hole compatibility - making P4SMA24CA-M3/61 optimal for space-constrained, high-frequency, and automotive-grade surface-mount deployments.
Availability
P4SMA24CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB docking stations, and telecom DSL line cards requiring stable component supply with halogen-free, RoHS-compliant construction.
Supply support for P4SMA24CA-M3/61 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 automotive-grade qualification.
The P4SMA Series targets compact, high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for low-profile SMT assembly, AEC-Q101 compliance, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of P4SMA24CA-M3/61 at its rated peak pulse current?
The P4SMA24CA-M3/61 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 defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 24 V nominal systems and 3.3 V/5 V interface ICs downstream of the P4SMA24CA-M3/61.
Is P4SMA24CA-M3/61 suitable for automotive applications?
Yes, the P4SMA24CA-M3/61 is halogen-free and RoHS-compliant, and an AEC-Q101-qualified version (P4SMA24CAHM3_A/H) is available. While the base P4SMA24CA-M3/61 itself is commercial-grade, its construction - including glass-passivated junction, MSL Level 1 rating, and 150 °C TJ max - aligns with automotive environmental requirements. For certified deployment, specify the HM3 suffix variant of P4SMA24CA-M3/61 to ensure full qualification documentation and traceability.
How does the bidirectional nature of P4SMA24CA-M3/61 affect PCB layout?
The P4SMA24CA-M3/61 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment - terminals are interchangeable. This simplifies routing on differential pairs (e.g., CAN H/L, RS-485 A/B) and eliminates risk of misplacement during automated assembly. Layout best practices still require symmetric trace lengths and minimized loop area between P4SMA24CA-M3/61 terminals and protected nodes to preserve high-frequency surge shunting efficacy.
What is the thermal resistance of P4SMA24CA-M3/61, and how does it impact power derating?
The P4SMA24CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. At ambient temperatures above 25 °C, its peak pulse power must be derated per Figure 2 in Vishay document 88367 - e.g., at 75 °C TA, PPPM drops to ~320 W. Continuous power dissipation remains limited to 3.3 W, so sustained overvoltage conditions require external current limiting to avoid thermal runaway of the P4SMA24CA-M3/61.
Does P4SMA24CA-M3/61 meet industry surge immunity standards?
Yes, the P4SMA24CA-M3/61 supports compliance with IEC 61000-4-5 (surge immunity) Level 3 (1 kV line-earth, 2 kV line-line) and IEC 61000-4-2 (ESD) Level 4 (15 kV air, 8 kV contact) when implemented with proper PCB layout - including short traces, low-inductance grounding, and adequate copper pour. Its 400 W PPPM, 33.2 V VC, and sub-nanosecond response enable robust protection in systems referencing these standards, including those using the P4SMA24CA-M3/61 in front-end protection stages.
P4SMA24CA-M3/61 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-M3/61 FAQ
1.How can I place an order for P4SMA24CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CA-M3/61 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-M3/61 reliable?
The price and inventory of P4SMA24CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CA-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA24CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CA-M3/61?
P4SMA24CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CA-M3/61 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-M3/61?
For technical support, including P4SMA24CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CA-M3/61 requirements.
6.How does Aetrix verify that P4SMA24CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA24CA-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA24CA-M3/61?
All P4SMA24CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CA-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA24CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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