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Vishay General Semiconductor - Diodes Division P4SMA27CAHE3_A/I
- Part No.:
- P4SMA27CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
P4SMA27CAHE3_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 27 V breakdown voltage (VBR = 25.7–28.4 V 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 - suitable for protecting automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the P4SMA27CAHE3_A/I datasheet, P4SMA27CAHE3_A/I pinout, P4SMA27CAHE3_A/I application, or P4SMA27CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly 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 under repetitive surge conditions.
The P4SMA27CAHE3_A/I delivers 400 W peak pulse power (derated to 300 W above 91 V) and maintains clamping performance across -65 °C to +150 °C junction temperature range. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche onset threshold for bidirectional clamping |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient energy absorption capacity under standardized surge waveform |
| IPPM | 10.7 A - maximum non-repetitive surge current the device safely conducts |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTRB, HTGB, and TCT |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No marking; symmetric conduction path enables identical clamping in either polarity |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | No band or marking - distinguishes it from unidirectional variants and confirms bidirectional functionality |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems with margin |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking, simplifying SMT production flow |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD events in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines to limit transient excursions without disrupting signal integrity. Use Value: Prevents latch-up or damage to transceivers during ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD events up to ±15 kV contact discharge. |
Use Scenario: Safeguarding analog input channels (0–10 V, 4–20 mA) in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Parallel-connected TVS suppressing induced surges from relay switching, motor starts, or lightning-induced coupling. Use Value: Maintains measurement accuracy by limiting input overvoltage to ≤37.5 V, well below ADC front-end damage thresholds. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Protection |
Use Scenario: Input-stage transient suppression on USB-C PD and 24 V wall adapters subject to AC line surges and hot-plug events. IC Role / Device Role / Timing Role: Primary clamping element on DC input rail, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Absorbs 400 W surges without degradation, ensuring adapter compliance with UL 62368-1 surge immunity requirements. |
Use Scenario: Secondary-side protection on Ethernet PHY power rails and data lines in enterprise switches and base station equipment. IC Role / Device Role / Timing Role: Fast-response shunt device limiting voltage overshoot during lightning-induced longitudinal surges on PoE-powered ports. Use Value: Clamps within nanoseconds to protect 100BASE-TX magnetics and PHY ICs rated for ≤40 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same VBR, VC, and PPPM | Suitable for lower-power or less thermally constrained layouts where SMB footprint is preferred | Select when board space allows larger SMB package and thermal derating margins are sufficient |
| 1.5KE27CA | Through-hole DO-201 package; higher PPPM (1500 W) but slower response and larger footprint | Used in legacy designs or high-energy surge zones where leaded mounting provides mechanical robustness | Choose only for through-hole prototyping or retrofit where SMT is not feasible |
Compared with SMBJ27CA and 1.5KE27CA, the P4SMA27CAHE3_A/I offers superior thermal performance in compact SMT form factor and AEC-Q101 qualification - making it optimal for new automotive and high-density industrial designs requiring reliable, automated assembly.
Availability
P4SMA27CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line card surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA27CAHE3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The P4SMA Series targets cost-sensitive yet mission-critical transient protection needs, combining AEC-Q101 qualification, standardized SMT packaging, and consistent clamping performance across voltage grades.
FAQ
What is the breakdown voltage tolerance for P4SMA27CAHE3_A/I?
The P4SMA27CAHE3_A/I has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting sensitive 3.3 V or 5 V logic interfaces downstream of the P4SMA27CAHE3_A/I.
Is P4SMA27CAHE3_A/I suitable for automotive applications?
Yes, P4SMA27CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix and revision "A" code. It undergoes stress testing including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for engine control units, body electronics, and ADAS sensor modules where P4SMA27CAHE3_A/I serves as primary transient suppression.
How does the clamping voltage of P4SMA27CAHE3_A/I compare to its standoff voltage?
The P4SMA27CAHE3_A/I has a maximum standoff voltage (VWM) of 23.1 V and a maximum clamping voltage (VC) of 37.5 V at 10.7 A, yielding a clamping ratio of approximately 1.62. This ratio reflects the device's ability to remain non-conductive below 23.1 V while limiting surge voltages to a safe 37.5 V ceiling - a design balance optimized for 24 V system protection where P4SMA27CAHE3_A/I prevents overvoltage damage without false triggering.
What is the peak pulse current rating for P4SMA27CAHE3_A/I?
The P4SMA27CAHE3_A/I is rated for a peak pulse current (IPPM) of 10.7 A under the standard 10/1000 µs double-exponential waveform. This value is derived directly from its 400 W peak pulse power rating and 37.5 V clamping voltage (I = P/V). The IPPM rating assumes mounting on 0.2" × 0.2" copper pads - a condition that must be replicated in layout to ensure P4SMA27CAHE3_A/I delivers full specified surge capability.
Does P4SMA27CAHE3_A/I have polarity markings on the package?
No, P4SMA27CAHE3_A/I lacks polarity markings such as a cathode band because it is a bidirectional TVS diode. Its symmetrical construction allows identical clamping behavior regardless of voltage polarity across its terminals. This absence of marking distinguishes it from unidirectional variants (e.g., P4SMA27A) and confirms its intended use in AC-coupled or floating circuits where P4SMA27CAHE3_A/I provides polarity-agnostic protection.
P4SMA27CAHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA27CAHE3_A/I FAQ
1.How can I place an order for P4SMA27CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHE3_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 P4SMA27CAHE3_A/I reliable?
The price and inventory of P4SMA27CAHE3_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 P4SMA27CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHE3_A/I?
P4SMA27CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHE3_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 P4SMA27CAHE3_A/I?
For technical support, including P4SMA27CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA27CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHE3_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 P4SMA27CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHE3_A/I?
All P4SMA27CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHE3_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 P4SMA27CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA27CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA27CAHE3_A/I Tags
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