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Vishay General Semiconductor - Diodes Division P4SMA51CAHE3_A/H
- Part No.:
- P4SMA51CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAHE3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
P4SMA51CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial systems.
For engineers reviewing the P4SMA51CAHE3_A/H datasheet, P4SMA51CAHE3_A/H pinout, P4SMA51CAHE3_A/H application, or P4SMA51CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low Rsurge supports effective energy diversion during ESD and lightning-induced surges.
The device is rated for 400 W peak pulse power (10/1000 µs) up to 91 V, derating to 300 W above that threshold, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 120 °C/W) reflects performance on 0.2" × 0.2" copper pads, and it complies with UL 497B for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 70.1 V at 5.7 A IPPM - Peak voltage seen by protected circuit under full-rated transient; critical for IC survival margin |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Energy-handling capacity for standardized surge waveforms; validated at TA = 25 °C |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement; compatible with J-STD-020 reflow |
Pinout & Package
Package: SMA (DO-214AC), 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 | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Provides identical clamping behavior in either direction - no DC polarity dependency required in layout |
| Cathode | Current exit terminal in forward bias; electrically equivalent to anode for bidirectional devices | Enables use across AC signals, differential buses (e.g., RS-485), or ungrounded power rails without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal paths without external polarity management |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity when properly laid out with recommended copper area |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring long-term field reliability |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with low leakage drift and repeatable clamping performance |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without pre-baking; eliminates moisture-related popcorning risk in production |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Communication Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground to clamp transients before they reach ADC input or signal conditioner IC. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by limiting voltage to ≤70.1 V, preventing latch-up or damage to 3.3 V/5 V sensor front-ends. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subjected to EFT and surge coupling from motor drives. IC Role / Device Role / Timing Role: Placed differentially between A/B bus lines and common-mode referenced to ground to suppress common-mode surges. Use Value: Clamps 4 kV ESD (IEC 61000-4-2) and 1 kV surge (IEC 61000-4-5) without degrading signal rise time, preserving data rates up to 10 Mbps. |
| Consumer USB Port ESD Protection | DC Power Rail Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays where internal ICs lack full IEC 61000-4-2 immunity. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to shunt ESD current before reaching USB PHY. Use Value: Limits transient voltage to <70.1 V within <1 ns, preventing damage to 1.8 V/3.3 V USB transceivers while adding <0.5 pF parasitic capacitance. |
Use Scenario: Input-stage surge suppression on 24 V DC power supplies feeding industrial controllers, guarding against induced lightning surges. IC Role / Device Role / Timing Role: Connected line-to-ground to clamp positive/negative polarity surges on unregulated DC input rails. Use Value: Absorbs 400 W transient energy without failure, maintaining system uptime during 10/1000 µs surges up to 1 kA peak in harsh plant-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | 600 W PPPM rating, larger SMB (DO-214AA) package, higher RθJA (90 °C/W), same VWM/VBR/VC specs | Better suited for higher-energy surges but requires larger PCB footprint and more copper area | Select when surge energy exceeds 400 W or when legacy SMB layout exists |
| 1.5KE51CA | 1500 W PPPM, axial DO-201AD package, higher VC (84.5 V), slower response due to higher junction capacitance | Designed for board-edge or chassis-level primary protection, not fine-pitch SMT signal lines | Choose for cost-sensitive through-hole designs or where higher clamping voltage is acceptable |
Compared with SMBJ51CA and 1.5KE51CA, P4SMA51CAHE3_A/H delivers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge handling - making it preferred for space-constrained automotive and industrial SMT assemblies requiring certified reliability.
Availability
P4SMA51CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, consumer USB interfaces, and 24 V DC power rail protection requiring stable component supply across extended production lifecycles.
Supply support for P4SMA51CAHE3_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 high-reliability and automotive-grade solutions.
The P4SMA series targets cost-effective, high-volume transient suppression in automotive, industrial, and communications equipment - engineered for AEC-Q101 compliance, automated assembly, and robust surge immunity in harsh environments.
FAQ
What does the "CA" suffix indicate in P4SMA51CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning P4SMA51CAHE3_A/H provides symmetrical clamping in both polarities, unlike unidirectional "A" variants. This allows use across AC signals, differential buses, or floating grounds without polarity concerns. The device has no cathode band marking, consistent with bidirectional TVS design.
Is P4SMA51CAHE3_A/H qualified for automotive applications?
Yes, P4SMA51CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix) and documentation. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive powertrain, body control, and ADAS modules.
What is the maximum clamping voltage of P4SMA51CAHE3_A/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA51CAHE3_A/H is 70.1 V at 5.7 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the highest voltage imposed on the protected circuit during a full-rated transient event and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does P4SMA51CAHE3_A/H require special PCB layout considerations?
Yes - P4SMA51CAHE3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power. Short, low-inductance traces to protected nodes and direct grounding are essential; inadequate copper area reduces surge capability and risks thermal failure during repetitive events.
How does the "HE3" suffix differ from "E3" in P4SMA51CAHE3_A/H?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, whereas "E3" denotes RoHS compliance only (commercial grade). P4SMA51CAHE3_A/H is specifically intended for automotive and high-reliability industrial use, with additional qualification testing beyond standard commercial requirements.
P4SMA51CAHE3_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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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)
P4SMA51CAHE3_A/H FAQ
1.How can I place an order for P4SMA51CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAHE3_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 P4SMA51CAHE3_A/H reliable?
The price and inventory of P4SMA51CAHE3_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 P4SMA51CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA51CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAHE3_A/H?
P4SMA51CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAHE3_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 P4SMA51CAHE3_A/H?
For technical support, including P4SMA51CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA51CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAHE3_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 P4SMA51CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA51CAHE3_A/H?
All P4SMA51CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAHE3_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 P4SMA51CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA51CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CAHE3_A/H Tags
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