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Vishay General Semiconductor - Diodes Division P6SMB51CAHM3_A/I
- Part No.:
- P6SMB51CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHM3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,507
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Product details
Overview
P6SMB51CAHM3_A/I 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 and power lines. It features a 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the P6SMB51CAHM3_A/I datasheet, P6SMB51CAHM3_A/I pinout, P6SMB51CAHM3_A/I application, or P6SMB51CAHM3_A/I equivalent, this device is selected for robust ESD and surge protection in AEC-Q101-qualified automotive systems, where low clamping voltage, fast response time, and halogen-free RoHS compliance are required.
Technical Context
The P6SMB51CAHM3_A/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 43.6 V stand-off voltage), while its SMB (DO-214AA) package supports automated placement and meets MSL level 1 reflow requirements up to 260 °C.
It delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). The device is rated for continuous operation from –65 °C to +150 °C junction temperature and supports repetitive surge events at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA test current - defines precise avalanche onset threshold for reliable clamping initiation |
| VWM | 43.6 V - maximum reverse working voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage during 600 W transient event; determines protected circuit's maximum stress level |
| IPPM | 8.6 A - peak pulse current capability under 10/1000 µs waveform; quantifies surge energy handling capacity |
| PPPM | 600 W - peak pulse power rating; enables protection against IEC 61000-4-5 Level 4 surges when properly mounted |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration with no polarity marking; terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical conduction path with cathode |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current during positive transients; enables bidirectional clamping without external polarity routing |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial end equipment |
| 600 W peak pulse power (10/1000 µs) | Provides immunity to high-energy transients per ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers |
Applications
| Automotive Sensor Interface Protection | Industrial Digital I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching MCU ADC or LIN transceiver. Use Value: Limits induced voltage to ≤70.1 V during 100 A load dump events, preserving signal integrity and preventing latch-up in 5 V or 3.3 V sensor signal chains. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Standoff protector across input terminals, conducting only during >43.6 V transients while remaining high-impedance during normal operation. Use Value: Withstands repeated 600 W surges without degradation, enabling >100,000 surge cycles in factory automation environments per IEC 61000-4-4. |
| Telecom Line Driver Protection | Consumer USB/UART Data Line Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Primary transient suppressor placed differential-mode across A/B lines, leveraging bidirectional symmetry for common-mode and differential-mode suppression. Use Value: Clamps 1 kV/0.5 µs transients to <70.1 V within <1 ns, maintaining data integrity for 10 Mbps RS-485 communication. |
Use Scenario: Adding secondary-level surge protection to USB 2.0 D+/D− or UART TX/RX lines in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) TVS placed adjacent to connector to absorb ±15 kV contact ESD per IEC 61000-4-2. Use Value: Delivers sub-1 ns response with <1 µA leakage at 43.6 V, ensuring no signal distortion or false triggering on 480 Mbps USB data paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same 51 V bidirectional rating, but lower 400 W PPPM and SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is prioritized over automotive qualification and 600 W surge headroom |
| 1.5KE51CA | Through-hole DO-201 package, identical 51 V/600 W specs, but higher RθJA (75 °C/W) and no AEC-Q101 option | Requires wave soldering; unsuitable for fully SMT automotive production | Choose for legacy industrial designs where through-hole assembly remains standard and reflow compatibility is unnecessary |
Compared with SMAJ51CA and 1.5KE51CA, the P6SMB51CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and SMB package suitability for high-volume automotive SMT lines - making it the preferred choice where regulatory compliance and manufacturing scalability are mandatory.
Availability
P6SMB51CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and telecom infrastructure requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for P6SMB51CAHM3_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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 validation are critical.
FAQ
What does the "HM3" suffix indicate in P6SMB51CAHM3_A/I?
The HM3 suffix in P6SMB51CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. This confirms the device meets automotive-grade reliability standards for temperature cycling, humidity testing, and surge endurance - essential for under-hood and ADAS applications. P6SMB51CAHM3_A/I is specifically certified for use in automotive electronics where material content and long-term stability are strictly regulated.
Is P6SMB51CAHM3_A/I unidirectional or bidirectional, and how is polarity identified?
P6SMB51CAHM3_A/I is a bidirectional TVS diode, meaning it clamps transients of either polarity symmetrically. Unlike unidirectional variants, it carries no cathode band marking - the SMB package is unpolarized and installed without orientation constraints. This simplifies PCB layout for AC-coupled or floating lines, and eliminates risk of incorrect placement during automated assembly. The "CA" in the part number explicitly confirms bidirectional functionality.
What is the maximum clamping voltage of P6SMB51CAHM3_A/I, and under what test condition is it specified?
The maximum clamping voltage of P6SMB51CAHM3_A/I is 70.1 V, measured at 8.6 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage that will appear across the device during a 600 W transient event, directly determining the overvoltage stress imposed on downstream circuitry. Engineers use this parameter to verify margin between VC and the protected IC's absolute maximum rating.
How does P6SMB51CAHM3_A/I perform in high-temperature environments such as automotive under-hood locations?
P6SMB51CAHM3_A/I is rated for continuous operation from –65 °C to +150 °C junction temperature and maintains full 600 W surge capability at TA = 25 °C. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W allow effective heat dissipation when mounted on recommended 5.0 mm × 5.0 mm copper pads. Derating curves confirm usable surge energy down to ~400 W at 125 °C ambient - sufficient for most engine compartment placements with proper layout.
Can P6SMB51CAHM3_A/I replace older P6SMB51CAHE3 or P6SMB51CA-E3 parts in existing designs?
Yes, P6SMB51CAHM3_A/I is a direct functional and mechanical replacement for P6SMB51CAHE3 and P6SMB51CA-E3, sharing identical electrical specs, SMB package dimensions, and solderability. The HM3 variant adds halogen-free composition and AEC-Q101 qualification - beneficial for new automotive designs - but requires no PCB changes. Existing layouts, footprints, and reflow profiles remain fully compatible, enabling seamless transition without redesign effort.
P6SMB51CAHM3_A/I 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:
- Obsolete
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51CAHM3_A/I FAQ
1.How can I place an order for P6SMB51CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHM3_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 P6SMB51CAHM3_A/I reliable?
The price and inventory of P6SMB51CAHM3_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 P6SMB51CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHM3_A/I?
P6SMB51CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHM3_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 P6SMB51CAHM3_A/I?
For technical support, including P6SMB51CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB51CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHM3_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 P6SMB51CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHM3_A/I?
All P6SMB51CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHM3_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 P6SMB51CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB51CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHM3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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