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Vishay General Semiconductor - Diodes Division P6SMB51CAHE3/52
- Part No.:
- P6SMB51CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHE3/52.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,609
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Product details
Overview
P6SMB51CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), and clamps to ≤70.1 V at 8.6 A peak pulse current (10/1000 µs), delivering 600 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor line protection.
For engineers reviewing the P6SMB51CAHE3/52 datasheet, P6SMB51CAHE3/52 pinout, P6SMB51CAHE3/52 application, or P6SMB51CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and low leakage (<1 µA at VWM).
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2 in the datasheet. Mounting on 5.0 mm × 5.0 mm copper pads per JEDEC standard enables reliable thermal dissipation under repetitive 0.01% duty cycle pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43.6 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 48.5–53.6 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events |
| VC (Clamping) | ≤70.1 V at 8.6 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case transient |
| IPPM | 8.6 A - Maximum non-repetitive surge current the device safely clamps without degradation |
| PPPM | 600 W - Peak pulse power handling capacity with 10/1000 µs waveform, defining transient energy absorption limit |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance under standard PCB pad layout; informs thermal design margin |
| ID (Leakage) | <1 µA at VWM - Minimal reverse leakage preserves signal integrity and power efficiency in standby |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | One terminal of symmetrical PN junction; conducts during negative transients |
| Cathode | Transient return path (bidirectional) | Other terminal of symmetrical PN junction; conducts during positive transients |
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-grade reliability including temperature cycling, humidity, and mechanical shock |
| 600 W peak pulse power | Supports robust immunity against IEC 61000-4-5 Level 4 (4 kV surge) when properly mounted |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal stress |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching ADC input or signal conditioner. Use Value: Maintains signal fidelity by limiting transient overshoot to ≤70.1 V while surviving 1000+ surge events per AEC-Q101 stress profile. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in industrial gateways subjected to EFT bursts and capacitive coupling noise. IC Role / Device Role / Timing Role: Symmetric transient suppressor across differential bus lines, leveraging bidirectional behavior to clamp both polarities equally. Use Value: Prevents CAN controller latch-up by clamping common-mode surges to <70.1 V without adding capacitance that degrades 1 Mbps signal integrity. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Interface |
|
Use Scenario: Secondary-side overvoltage protection on 12 V/24 V DC outputs of wall adapters subject to capacitor discharge transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed after DC-DC converter output filter to absorb residual switching spikes and hot-plug events. Use Value: Limits output voltage excursion to safe levels for downstream USB-PD or PoE-powered devices without affecting steady-state regulation. |
Use Scenario: Protection of ADSL/VDSL line drivers and receivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary-level bidirectional suppressor bridging tip/ring lines before transformer coupling, referenced to chassis ground. Use Value: Withstands 600 W surges per ITU-T K.20/K.21 requirements while maintaining low leakage (<1 µA) to avoid baseline drift in high-impedance receive paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (DO-214AC), larger footprint than SMB | Less suitable for space-constrained automotive modules requiring 600 W rating | Select only if board layout allows SMA and system surge level is ≤400 W |
| 1.5KE51CA | Through-hole TO-218 package; identical electrical specs but higher RθJA (~50 °C/W on large heatsink vs. 100 °C/W for SMB) | Not suitable for fully SMT production or high-density layouts | Prefer only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ51CA and 1.5KE51CA, P6SMB51CAHE3/52 delivers equal clamping performance in a smaller, AEC-Q101-qualified SMB package optimized for automated SMT assembly and automotive thermal environments.
Availability
P6SMB51CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapter outputs, and telecom DSL line protection requiring stable component supply with AEC-Q101 assurance.
Supply support for P6SMB51CAHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems, combining AEC-Q101 qualification, 600 W pulse capability, and SMB packaging for compact, robust front-end protection.
FAQ
What does the "CA" suffix indicate in P6SMB51CAHE3/52?
The "CA" suffix denotes a bidirectional configuration: P6SMB51CAHE3/52 has symmetrical clamping characteristics for both positive and negative transients, unlike unidirectional variants (e.g., P6SMB51A). This eliminates polarity concerns during placement and enables use on AC-coupled or floating lines without external diode pairing. The device achieves this via a back-to-back PN junction structure inherent to the CA variant.
Is P6SMB51CAHE3/52 RoHS-compliant and halogen-free?
Yes, P6SMB51CAHE3/52 carries the "HE3" suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. However, it is not halogen-free - halogen-free versions use the "HM3" suffix (e.g., P6SMB51CAHM3/52). The HE3 variant meets JEDEC JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements up to 260 °C peak.
What is the maximum clamping voltage of P6SMB51CAHE3/52 under standard test conditions?
The maximum clamping voltage (VC) of P6SMB51CAHE3/52 is 70.1 V, measured at 8.6 A peak pulse current with a 10/1000 µs waveform at TA = 25 °C. This value represents the upper bound voltage imposed on the protected circuit during worst-case transient events and is guaranteed across the full operating temperature range per Vishay's characterization data.
Can P6SMB51CAHE3/52 be used in place of P6SMB51A in a new design?
No - P6SMB51CAHE3/52 is bidirectional while P6SMB51A is unidirectional. Substituting them requires verifying circuit topology: P6SMB51A relies on cathode/anode orientation and may require series blocking diodes for AC protection, whereas P6SMB51CAHE3/52 functions identically in either direction. Layout changes are unnecessary, but schematic review for polarity dependency is essential before replacement.
What is the thermal resistance (RθJA) of P6SMB51CAHE3/52 and how is it measured?
P6SMB51CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per JEDEC standards. This value assumes no additional heatsinking and defines the temperature rise above ambient per watt of sustained power dissipation - critical for estimating junction temperature under repetitive surge conditions.
P6SMB51CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 8.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB51CAHE3/52 FAQ
1.How can I place an order for P6SMB51CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHE3/52 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 P6SMB51CAHE3/52 reliable?
The price and inventory of P6SMB51CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CAHE3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHE3/52?
P6SMB51CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHE3/52 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 P6SMB51CAHE3/52?
For technical support, including P6SMB51CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHE3/52 requirements.
6.How does Aetrix verify that P6SMB51CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHE3/52 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 P6SMB51CAHE3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHE3/52?
All P6SMB51CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHE3/52, 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 P6SMB51CAHE3/52 part is unused and in its original packaging.
Return procedure for P6SMB51CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHE3/52 Tags
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