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Vishay General Semiconductor - Diodes Division P4SMA27CAHM3_A/H
- Part No.:
- P4SMA27CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHM3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
P4SMA27CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 27 V breakdown voltage (VBR min/max = 25.7–28.4 V at 1.0 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 - suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA27CAHM3_A/H datasheet, P4SMA27CAHM3_A/H pinout, P4SMA27CAHM3_A/H application, or P4SMA27CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal resistance (RθJA = 120 °C/W) for board-level surge protection design.
Technical Context
The P4SMA27CAHM3_A/H operates as a bidirectional avalanche diode, leveraging glass-passivated junction technology to deliver symmetrical clamping in both polarities without polarity marking. Its 27 V nominal breakdown enables robust protection of 24 V industrial buses and automotive CAN/LIN signal lines against ESD and load-dump transients.
It meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supports 150 °C max junction temperature, and delivers low incremental surge resistance for fast response (<1 ns typical) and stable clamping under repetitive 0.01% duty cycle pulses - critical for high-reliability embedded control units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 37.5 V at 10.7 A - peak clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity for automotive and industrial transient immunity |
| IPPM | 10.7 A - peak pulse current capability enabling protection of 24 V systems per ISO 7637-2 Pulse 1/2/5a |
| TJ max | +150 °C - supports operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 120 °C/W - thermal resistance informs PCB copper pad sizing (0.2" × 0.2") for sustained power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode band absent - bidirectional symmetry confirmed per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetric with cathode for bidirectional operation |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; no band marking confirms bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 16750-2 and ISO 7637-2 test requirements for 12 V/24 V vehicle systems |
| Low profile SMA (DO-214AC) package | Enables automated SMT placement and fits tight board spaces in sensor nodes and ECUs |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog and digital signal lines (e.g., temperature, pressure, position sensors) in engine bays and chassis modules from load dump and ESD. IC Role / Device Role / Timing Role: Bidirectional clamping device placed directly at connector interface to shunt transients before reaching MCU ADC or CAN transceiver. Use Value: Limits voltage to ≤37.5 V during 10.7 A surges, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. |
Use Scenario: Safeguarding 24 V DC input/output terminals of programmable logic controllers against field wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary TVS at terminal block entry point, coordinated with upstream fuses and downstream filtering. Use Value: Absorbs 400 W surges without degradation, maintaining system uptime in factory automation environments. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Clamping induced surges on 24 V/48 V telecom power distribution boards exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Secondary protection stage after GDT or MOV, providing fast, low-clamp response for sensitive DC-DC converters. Use Value: 37.5 V clamping ensures safe operation of 40 V-rated buck regulators and PMICs downstream. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback. Use Value: Withstands repetitive 10.7 A pulses at 0.01% duty cycle, extending motor driver MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Higher VBR (24.4–27.1 V), same SMA package, 600 W PPPM, but RθJA = 100 °C/W | Better suited for higher-energy 24 V bus protection where 600 W margin is required | Select SMBJ26CA when higher pulse power headroom is needed; verify thermal layout for lower RθJA |
| SMCJ24CA | Larger SMC (DO-214AB) package, 1500 W PPPM, VBR = 22.8–25.2 V, RθJA = 50 °C/W | Used where PCB space allows larger footprint and higher surge immunity (e.g., main power entry) | Choose SMCJ24CA for primary-level protection; P4SMA27CAHM3_A/H remains optimal for space-constrained secondary protection |
Compared with SMBJ26CA and SMCJ24CA, the P4SMA27CAHM3_A/H offers the best balance of AEC-Q101 qualification, compact SMA footprint, and precise 27 V clamping for secondary-level protection in automotive and industrial edge nodes - without requiring layout changes or derating for thermal performance.
Availability
P4SMA27CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor interfaces, telecom power rails, and consumer appliance motor controls requiring stable component supply and AEC-Q101 compliance.
Supply support for P4SMA27CAHM3_A/H 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 optoelectronics with emphasis on reliability and automotive-grade qualification.
The P4SMA series targets cost-effective, high-volume transient protection for automotive, industrial, and telecom applications - engineered for AEC-Q101 compliance, automated assembly, and consistent clamping performance across temperature.
FAQ
What is the breakdown voltage range of the P4SMA27CAHM3_A/H?
The P4SMA27CAHM3_A/H has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1.0 mA test current. This bidirectional specification applies equally in both polarities and is measured per ANSI/IEEE C62.35 standards. The value ensures reliable clamping onset for 24 V nominal systems while accommodating manufacturing tolerances and temperature drift up to ±0.096 %/°C.
Is the P4SMA27CAHM3_A/H AEC-Q101 qualified?
Yes, the P4SMA27CAHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA series datasheet (Document Number 88367, Revision 09-Jan-2024). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and ESD - making the P4SMA27CAHM3_A/H suitable for automotive powertrain, chassis, and body electronics applications.
What does the "CA" suffix indicate in P4SMA27CAHM3_A/H?
The "CA" suffix in P4SMA27CAHM3_A/H denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P4SMA27AHM3_A/H), the CA version provides symmetrical clamping in both voltage polarities, with no cathode band marking. Electrical characteristics - including VBR, VWM, and VC - apply identically in forward and reverse directions, enabling simplified layout for AC-coupled or floating signal lines.
What is the maximum clamping voltage of the P4SMA27CAHM3_A/H at rated peak pulse current?
The P4SMA27CAHM3_A/H exhibits a maximum clamping voltage (VC) of 37.5 V at its rated peak pulse current (IPPM) of 10.7 A, tested with a 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case transient events and is critical for ensuring downstream components (e.g., 3.3 V or 5 V logic) remain within safe operating limits.
Does the P4SMA27CAHM3_A/H require special PCB layout considerations?
Yes - the P4SMA27CAHM3_A/H should be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in the datasheet. This pad size ensures adequate heat dissipation for its 120 °C/W junction-to-ambient thermal resistance and supports reliable operation at full 400 W pulse rating. Short, direct traces to protected nodes are also essential to minimize inductance and preserve clamping speed.
P4SMA27CAHM3_A/H 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/H FAQ
1.How can I place an order for P4SMA27CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHM3_A/H 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/H reliable?
The price and inventory of P4SMA27CAHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHM3_A/H?
P4SMA27CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHM3_A/H 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/H?
For technical support, including P4SMA27CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA27CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHM3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHM3_A/H?
All P4SMA27CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHM3_A/H, 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/H part is unused and in its original packaging.
Return procedure for P4SMA27CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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