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Vishay General Semiconductor - Diodes Division P6SMB51CAHM3/I
- Part No.:
- P6SMB51CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHM3/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,821
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Product details
Overview
P6SMB51CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P6SMB51CAHM3/I datasheet, P6SMB51CAHM3/I pinout, P6SMB51CAHM3/I application, or P6SMB51CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMB (DO-214AA) package thermal performance, and compliance with IEC 61000-4-2/4-5 surge immunity requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding its reverse standoff voltage (VWM = 43.6 V), it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM).
Designed for high-reliability environments, P6SMB51CAHM3/I meets AEC-Q101 stress test requirements and is halogen-free, RoHS-compliant (HM3 suffix), with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility. Junction temperature range spans −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise avalanche initiation threshold in both directions |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 600 W - peak transient power handling capability under standardized surge waveform |
| IPPM | 8.6 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | +150 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, informs PCB copper pad design for power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line |
| Cathode | Transient current exit (bidirectional) | Completes shunt path to ground or reference rail; identical electrical role as Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage in both polarities - eliminates need for polarity-aware layout |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly (260 °C peak) |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-ground, 2 kV line-to-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, protecting 3.3 V/5 V/12 V logic and analog circuits |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector interface to clamp transients before they reach signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADC front-ends while maintaining signal integrity below 70.1 V. |
Use Scenario: Safeguarding 24 V digital input modules against field-wiring induced surges and relay coil flyback in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input lines, operating continuously within −40 °C to +85 °C ambient. Use Value: Enables >100,000 surge cycles per IEC 61000-4-5 without parameter drift, reducing field failure rates in harsh EMI environments. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-level protection on Ethernet PHY power rails (3.3 V, 5 V) and RS-485 bus lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage limiter placed after primary GDT or MOV, absorbing residual energy. Use Value: Clamps 10/1000 µs transients to ≤70.1 V within 1.0 ps, preserving PHY IC reliability without adding propagation delay. |
Use Scenario: Input-stage surge suppression on AC-DC adapter secondary-side 12 V/19 V rails feeding laptop or monitor power management ICs. IC Role / Device Role / Timing Role: Standoff-rated (43.6 V) bidirectional clamp that remains inactive during normal regulation but activates instantly during surge events. Use Value: Eliminates need for separate unidirectional devices on dual-rail designs, reducing BOM count and PCB area in space-constrained adapters. |
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 VBR (48.5–53.6 V) and VC (70.1 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when board space is critical and surge energy is constrained to <400 W. |
| SMCJ51CA | Higher PPPM = 1500 W, same VBR/VC; larger SMC (DO-214AB) package with lower RθJA = 50 °C/W | Supports repeated high-energy surges; requires more PCB area and higher mounting pad copper | Choose for mission-critical industrial controls where 1500 W margin and thermal robustness outweigh size constraints. |
Compared with SMAJ51CA and SMCJ51CA, P6SMB51CAHM3/I delivers optimal balance of 600 W surge capacity, SMB footprint efficiency, AEC-Q101 qualification, and halogen-free compliance - making it the preferred choice for cost-sensitive, volume automotive and industrial designs requiring validated reliability.
Availability
P6SMB51CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB51CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P6SMB Series targets high-volume, high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless SMT integration.
FAQ
What does the "CA" suffix indicate in P6SMB51CAHM3/I?
The "CA" suffix in P6SMB51CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions, with identical breakdown and clamping characteristics across its terminals. This eliminates polarity concerns during PCB placement and simplifies design for AC-coupled or differential signal lines.
Is P6SMB51CAHM3/I qualified for automotive applications?
Yes, P6SMB51CAHM3/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it suitable for under-hood and cabin electronics in passenger vehicles and commercial vehicles.
What is the maximum clamping voltage of P6SMB51CAHM3/I and at what current is it specified?
The maximum clamping voltage of P6SMB51CAHM3/I is 70.1 V, measured at a peak pulse current (IPPM) of 8.6 A using the standard 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge conditions.
How does the SMB (DO-214AA) package of P6SMB51CAHM3/I compare thermally to larger packages like SMC?
P6SMB51CAHM3/I in SMB (DO-214AA) has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, versus ~50 °C/W for SMC-packaged equivalents. This means the SMB version requires careful PCB layout - specifically 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - to sustain 600 W surge power without exceeding TJ = 150 °C.
Does P6SMB51CAHM3/I meet lead-free soldering requirements?
Yes, P6SMB51CAHM3/I meets lead-free soldering requirements: it is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102, and whisker resistance is certified to JESD 201 Class 2.
P6SMB51CAHM3/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:
- 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:
- 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/I FAQ
1.How can I place an order for P6SMB51CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHM3/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/I reliable?
The price and inventory of P6SMB51CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHM3/I?
P6SMB51CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHM3/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/I?
For technical support, including P6SMB51CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHM3/I requirements.
6.How does Aetrix verify that P6SMB51CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHM3/I?
All P6SMB51CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHM3/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/I part is unused and in its original packaging.
Return procedure for P6SMB51CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHM3/I Tags
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Diodes Incorporated
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