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Vishay General Semiconductor - Diodes Division P4SMA27CAHE3_A/H
- Part No.:
- P4SMA27CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA27CAHE3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:11,650
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Product details
Overview
P4SMA27CAHE3_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 = 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 a 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial control systems.
For engineers reviewing the P4SMA27CAHE3_A/H datasheet, P4SMA27CAHE3_A/H pinout, P4SMA27CAHE3_A/H application, or P4SMA27CAHE3_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 P4SMA27CAHE3_A/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at 23.1 V stand-off), while meeting MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform conditions, with fast response time (<1 ns) and low incremental surge resistance - enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 23.1 V - maximum continuous reverse working voltage before significant leakage occurs |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during worst-case 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient energy absorption capacity, critical for MIL-STD-1275/ISO 7637-2 compliance |
| IPPM | 10.7 A - maximum non-repetitive surge current the device sustains without failure |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking - bidirectional symmetry eliminates orientation concerns during automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - no fixed polarity |
| Cathode | Transient return path (bidirectional) | Identical electrical role to Anode; terminals are functionally interchangeable in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power | Sustains ISO 7637-2 Pulse 1/2a/5a surges without degradation in standard PCB pad layout |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard SMT assembly processes |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load dump and jump-start transients in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±200 V transients. Use Value: Prevents ADC saturation and latch-up by limiting voltage to ≤37.5 V during 10/1000 µs surges up to 10.7 A. |
Use Scenario: Shielding CAN_H/CAN_L differential pair against ESD and inductive coupling in factory automation PLCs. IC Role / Device Role / Timing Role: Two P4SMA27CAHE3_A/H devices deployed in common-mode configuration across bus lines. Use Value: Maintains CAN signal integrity by clamping common-mode surges while preserving <10 pF junction capacitance at 0 V bias. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding primary-side controller ICs in universal-input AC/DC adapters subjected to line surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Placed across bridge rectifier output to absorb 400 W transients before bulk capacitor. Use Value: Limits peak voltage to 37.5 V during 10/1000 µs events, preventing overvoltage shutdown of PWM controllers. |
Use Scenario: Protecting Ethernet PHY interface components on telecom line cards from lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Used in conjunction with gas discharge tubes (GDTs) as secondary-stage clamping device. Use Value: Provides low-clamp, fast-response backup protection after GDT fires, reducing let-through voltage to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Higher 600 W PPPM, larger SMB (DO-214AA) package, RθJA = 85 °C/W | Better suited for higher-energy surges but requires 30% more board area | Select when system-level surge tests exceed 400 W or thermal margin is constrained |
| 1.5KE27CA | Through-hole TO-204AE (DO-201AE), 1500 W PPPM, slower response due to higher parasitic inductance | Used in legacy power supply designs where SMT is not feasible | Choose only for repair/refurbishment of existing through-hole boards; not recommended for new designs |
Compared with SMBJ27CA and 1.5KE27CA, the P4SMA27CAHE3_A/H offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge handling - making it preferred for space-constrained automotive and industrial modules requiring production-grade reliability.
Availability
P4SMA27CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom line card protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for P4SMA27CAHE3_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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The P4SMA series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact, AEC-Q101-qualified surface-mount packages.
FAQ
What does the "CA" suffix indicate in P4SMA27CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration: the P4SMA27CAHE3_A/H functions identically for positive and negative transients, with no polarity marking required. This differs from unidirectional variants (e.g., P4SMA27A) that feature a cathode band and conduct only in reverse bias. The CA version is ideal for AC-coupled or floating signal paths where voltage polarity is undefined.
Is P4SMA27CAHE3_A/H suitable for automotive applications?
Yes - the P4SMA27CAHE3_A/H carries full AEC-Q101 qualification, verified across temperature cycling, high-temperature reverse bias (HTRB), and ESD testing. Its construction (glass-passivated junction, MSL Level 1, JESD201 Class 2 whisker resistance) meets automotive electronics requirements, and it is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the P4SMA family.
What is the maximum clamping voltage of P4SMA27CAHE3_A/H under surge conditions?
The P4SMA27CAHE3_A/H has a maximum clamping voltage (VC) of 37.5 V at 10.7 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 in the datasheet and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMA (DO-214AC) package of P4SMA27CAHE3_A/H compare to SMB or SMC packages?
The SMA package of the P4SMA27CAHE3_A/H measures 4.50 mm × 3.99 mm with 2.54 mm lead pitch - smaller than SMB (DO-214AA) and significantly smaller than SMC (DO-214AB). This reduces PCB area by ~30% versus SMBJ-series alternatives while maintaining 400 W surge capability. Thermal resistance is higher (RθJA = 120 °C/W vs. 85 °C/W for SMB), so layout must follow Vishay's recommended 5.0 mm × 5.0 mm copper pads per terminal.
Does P4SMA27CAHE3_A/H require derating above 25 °C ambient temperature?
Yes - the P4SMA27CAHE3_A/H must be derated linearly above 25 °C ambient per Figure 2 in the datasheet. At 85 °C ambient, its peak pulse power drops to ~280 W (70% of 400 W rating), and at 125 °C, it falls to ~160 W. Designers must verify that expected surge energy remains within the derated PPPM envelope, especially in enclosed automotive or industrial enclosures where board temperature exceeds ambient.
P4SMA27CAHE3_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:
- -
- 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/H FAQ
1.How can I place an order for P4SMA27CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA27CAHE3_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 P4SMA27CAHE3_A/H reliable?
The price and inventory of P4SMA27CAHE3_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 P4SMA27CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA27CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA27CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA27CAHE3_A/H?
P4SMA27CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA27CAHE3_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 P4SMA27CAHE3_A/H?
For technical support, including P4SMA27CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA27CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA27CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA27CAHE3_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 P4SMA27CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA27CAHE3_A/H?
All P4SMA27CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA27CAHE3_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 P4SMA27CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA27CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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