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Vishay General Semiconductor - Diodes Division P4SMA27CAHM3_A/I
- Part No.:
- P4SMA27CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHM3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,884
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Product details
Overview
P4SMA27CAHM3_A/I 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 23.1 V standoff voltage (VWM), 25.7–28.4 V breakdown voltage (VBR) at 1 mA, 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the P4SMA27CAHM3_A/I datasheet, P4SMA27CAHM3_A/I pinout, P4SMA27CAHM3_A/I application, or P4SMA27CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling robust transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports high thermal dissipation via copper pad mounting per JESD22-B102 solderability standards.
The P4SMA27CAHM3_A/I is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile. It delivers 400 W peak pulse power up to 91 V nominal, derating to 300 W above that threshold - consistent with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Voltage at which device enters avalanche region; tight tolerance enables predictable protection onset. |
| VC (Clamping Voltage) | 37.5 V at 10.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case transient; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capacity under standardized surge waveform; supports IEC 61000-4-5 Level 4 compliance. |
| IPPM (Peak Pulse Current) | 10.7 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| TJmax | 150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.0 mm × 5.0 mm copper pad footprint; optimized for automated assembly and thermal performance. |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; symmetric terminal function enables polarity-agnostic placement. |
| Cathode | Transient return path (bidirectional) | Identical functional role to Anode; terminals are electrically interchangeable in bidirectional TVS operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment modules. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and JESD201 Class 2 whisker resistance; supports green manufacturing and end-of-life compliance. |
| 400 W peak pulse power (10/1000 µs) | Enables protection against severe lightning-induced surges and inductive switching spikes in industrial motor drives and power supplies. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream components - critical for safeguarding 3.3 V and 5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT line integration and inventory management. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pairs or supply rails to limit transient excursions. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while preserving <1 µs response time and avoiding latch-up in connected microcontrollers. |
Use Scenario: Shielding digital input/output channels of programmable logic controllers from inductive kickback in solenoid and relay circuits. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting surge energy away from optocouplers and level translators on field-side PCBs. Use Value: Withstands repetitive 400 W surges at 0.01% duty cycle, extending field unit service life in factory automation environments. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Safeguard |
Use Scenario: Guarding Ethernet PHY interfaces and RS-485 transceivers against ESD and lightning-induced surges in network switches and base stations. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted at connector entry point, preceding common-mode chokes and data-line filters. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <40 V within nanoseconds, preventing damage to sensitive PHY silicon without signal distortion. |
Use Scenario: Securing secondary-side DC output rails of wall adapters and USB chargers against user-handling ESD and AC line transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed between +VOUT and GND to suppress fast-rising common-mode noise. Use Value: Delivers 37.5 V clamping at 10.7 A while adding <10 pF parasitic capacitance - avoids interference with USB 2.0 signal integrity. |
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 VWM (24 V), lower VC (38.9 V), same SMA package but 600 W PPPM. | Optimized for tighter clamping margin in 24 V systems; less margin below 23.1 V operating range. | Select when system nominal voltage is ≥24 V and lower clamping voltage is prioritized over exact VWM match. |
| 1.5KE27CA | Through-hole DO-201 package, 27 V VWM, 400 W PPPM, higher VC (45.4 V). | Not suitable for high-density SMT designs; requires manual or wave-solder assembly. | Choose only for legacy through-hole boards or prototyping where rework tolerance outweighs board space constraints. |
Compared with SMBJ24CA and 1.5KE27CA, the P4SMA27CAHM3_A/I offers precise 23.1 V standoff matching 24 V rail tolerances, AEC-Q101 qualification for automotive use, and halogen-free construction - making it optimal for new SMT-based automotive and industrial designs requiring regulatory compliance and long-term supply stability.
Availability
P4SMA27CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for P4SMA27CAHM3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-energy surge immunity, AEC-Q101 qualification, and automated manufacturability are mandatory.
FAQ
What is the clamping voltage of the P4SMA27CAHM3_A/I at its rated peak pulse current?
The P4SMA27CAHM3_A/I has a maximum clamping voltage (VC) of 37.5 V at 10.7 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per IEC 61000-4-5 and reflects the highest voltage the protected circuit will experience during a defined surge event. The P4SMA27CAHM3_A/I maintains this clamping performance across its full operating temperature range of -65 °C to +150 °C.
Is the P4SMA27CAHM3_A/I suitable for automotive applications?
Yes, the P4SMA27CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per AEC standards. The P4SMA27CAHM3_A/I is explicitly recommended for engine control units, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are critical.
What does the "CA" suffix mean in P4SMA27CAHM3_A/I?
The "CA" suffix in P4SMA27CAHM3_A/I denotes a bidirectional Transient Voltage Suppressor configuration. Unlike unidirectional variants (e.g., P4SMA27A), the CA version provides symmetrical clamping in both polarities - essential for protecting AC-coupled lines, differential buses like CAN or RS-485, and circuits where voltage polarity reversal may occur. The P4SMA27CAHM3_A/I has no polarity marking on its SMA package, confirming its bidirectional functionality.
What is the thermal resistance of the P4SMA27CAHM3_A/I, and how does it affect PCB layout?
The P4SMA27CAHM3_A/I 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 maintain safe junction temperatures under repetitive surge conditions, PCB layout must follow Vishay's recommended pad dimensions and minimize trace inductance. The P4SMA27CAHM3_A/I's RθJL of 30 °C/W further emphasizes the importance of short, wide copper pours connecting terminals directly to internal ground/power planes.
How does the P4SMA27CAHM3_A/I compare to unidirectional TVS diodes in circuit protection design?
The P4SMA27CAHM3_A/I eliminates polarity dependency in protection schemes, allowing placement across any two nodes without regard to DC bias direction - unlike unidirectional TVS diodes that require correct anode/cathode orientation relative to system ground. This simplifies layout, reduces BOM count, and improves robustness in AC or floating systems. However, the P4SMA27CAHM3_A/I exhibits slightly higher leakage at VWM than its unidirectional counterpart due to dual-junction structure, which must be accounted for in ultra-low-power sensor circuits.
P4SMA27CAHM3_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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA27CAHM3_A/I FAQ
1.How can I place an order for P4SMA27CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHM3_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 P4SMA27CAHM3_A/I reliable?
The price and inventory of P4SMA27CAHM3_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 P4SMA27CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHM3_A/I?
P4SMA27CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHM3_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 P4SMA27CAHM3_A/I?
For technical support, including P4SMA27CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA27CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHM3_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 P4SMA27CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHM3_A/I?
All P4SMA27CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHM3_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 P4SMA27CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA27CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27CAHM3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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