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Vishay General Semiconductor - Diodes Division P6SMB51CAHM3/H
- Part No.:
- P6SMB51CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHM3/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB51CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 43.6 V standoff voltage (VWM), 51 V nominal breakdown voltage (VBR), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB51CAHM3/H datasheet, P6SMB51CAHM3/H pinout, P6SMB51CAHM3/H application, or P6SMB51CAHM3/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism, delivering symmetrical reverse/forward conduction for bidirectional transient suppression. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables tight clamping during fast-rising ESD or lightning-induced surges.
The P6SMB51CAHM3/H is rated for repetitive 10/1000 μs pulses at 0.01% duty cycle and supports operating junction temperatures from –65 °C to +150 °C. It meets JESD201 Class 2 whisker resistance and is qualified to AEC-Q101 for automotive use - confirmed by HM3 suffix and "_B" revision code per Vishay ordering nomenclature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1.0 mA test current - precise avalanche onset range ensuring predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 70.1 V at 8.6 A IPPM - limits downstream voltage stress during 600 W transient, critical for protecting 48 V system ICs |
| PPPM (Peak Pulse Power) | 600 W - sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when mounted on 5.0 mm × 5.0 mm copper pads |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures |
| RθJA | 100 °C/W - thermal performance baseline for board-level thermal design; requires minimum pad area per datasheet fig. 6 |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode/anode terminals are unmarked for bidirectional configuration; polarity is non-applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical avalanche junction; conducts during positive or negative overvoltage excursions |
| Cathode | Transient current entry (forward bias) | Second terminal of symmetrical junction; identical electrical behavior to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Symmetrical VBR and VC in both polarities - eliminates need for polarity-aware placement in differential or AC-coupled lines |
| AEC-Q101 qualification | Validated reliability for automotive-grade deployment - required for ECUs, infotainment, and ADAS sensor protection |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - supports standard SMT assembly without dry-pack or baking requirements |
| Glass-passivated junction | Stable leakage (<1.0 μA) and breakdown voltage over temperature and lifetime - ensures long-term protection integrity |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave surges on 24/48 V systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ESD in vehicle door modules and seat control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential bus lines to limit transient voltage to <70.1 V during ISO 7637-2 events. Use Value: Prevents latch-up or permanent damage to transceivers rated for ≤80 V absolute maximum, enabling robust communication under harsh electrical conditions. |
Use Scenario: Safeguarding analog input channels (4–20 mA, 0–10 V) in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on signal conditioning PCBs, placed before precision op-amps and ADCs. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <0.5 pF capacitance - no bandwidth degradation. |
| Telecom Power Rail Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding 48 V DC power inputs of PoE-powered network switches and base stations from lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary MOV/GDT, absorbing residual energy not diverted upstream. Use Value: Limits rail voltage to 70.1 V during 600 W transients, preventing overvoltage shutdown or MOSFET gate oxide rupture in DC-DC controllers. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp flyback spikes generated during PWM commutation. Use Value: Eliminates arcing and contact erosion in relay/switch contacts while reducing EMI emissions by limiting dv/dt of switching edges. |
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/VWM/VC specs but lower PPPM (400 W); SMA package (DO-214AC), higher RθJA (140 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or sustained surge testing | Select only for cost-sensitive consumer applications where 400 W rating suffices and thermal headroom permits. |
| 1.5SMC51CA | Same electrical specs but larger SMC (DO-214AB) package; higher thermal mass, RθJA = 60 °C/W; same AEC-Q101 HM3 variant available | Better thermal performance under repeated surges; requires larger PCB footprint and different pick-and-place tooling | Prefer when system-level thermal validation shows SMB thermal margin insufficient for worst-case duty cycles. |
Compared with SMAJ51CA and 1.5SMC51CA, the P6SMB51CAHM3/H delivers optimal balance of 600 W surge handling, AEC-Q101 qualification, MSL Level 1 compatibility, and compact SMB footprint - making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability.
Availability
P6SMB51CAHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and consumer appliance motor controls requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P6SMB51CAHM3/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, efficiency, and application-specific validation.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for AEC-Q101 compliance, low clamping voltage, and robust surge endurance in compact surface-mount packages.
FAQ
What does the "CA" suffix indicate in P6SMB51CAHM3/H?
The "CA" suffix denotes a bidirectional configuration - meaning the P6SMB51CAHM3/H provides symmetrical clamping in both forward and reverse directions, unlike unidirectional variants (e.g., P6SMB51AHM3/H) that conduct only in one polarity. This makes the P6SMB51CAHM3/H ideal for AC-coupled lines, differential buses like CAN, and any application where voltage polarity reversal may occur during transients.
Is P6SMB51CAHM3/H suitable for automotive applications?
Yes, the P6SMB51CAHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and "_B" revision code per Vishay's ordering documentation. It is specifically intended for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces - meeting stringent reliability, thermal, and surge immunity requirements defined in AEC-Q101 Rev D.
What is the maximum clamping voltage of P6SMB51CAHM3/H and at what current is it specified?
The maximum clamping voltage (VC) of the P6SMB51CAHM3/H is 70.1 V, measured at a peak pulse current (IPPM) of 8.6 A under the standard 10/1000 μs waveform. This value represents the upper voltage limit imposed on protected circuitry during a 600 W transient event, directly informing system-level overvoltage margin calculations for downstream ICs.
How does the SMB (DO-214AA) package of P6SMB51CAHM3/H compare thermally to larger packages?
The SMB package of the P6SMB51CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. This is higher than SMC (60 °C/W) or DO-214AB packages but remains sufficient for most single-pulse or low-duty-cycle surge events - thermal derating curves in the datasheet must be applied for repetitive surge conditions.
Does P6SMB51CAHM3/H require special handling or PCB layout considerations?
Yes - the P6SMB51CAHM3/H must be mounted on minimum recommended pad layout (0.086" × 0.060", or 2.18 mm × 1.52 mm) to achieve rated PPPM and thermal performance. It is MSL Level 1, so no dry-pack or baking is needed, but solder profile must comply with J-STD-020 peak of 260 °C. Avoid excessive thermal vias under the device body, as they reduce effective pad area and degrade pulse power rating.
P6SMB51CAHM3/H 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/H FAQ
1.How can I place an order for P6SMB51CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHM3/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 P6SMB51CAHM3/H reliable?
The price and inventory of P6SMB51CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CAHM3/H is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHM3/H?
P6SMB51CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHM3/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 P6SMB51CAHM3/H?
For technical support, including P6SMB51CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHM3/H requirements.
6.How does Aetrix verify that P6SMB51CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHM3/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 P6SMB51CAHM3/H meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHM3/H?
All P6SMB51CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHM3/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 P6SMB51CAHM3/H part is unused and in its original packaging.
Return procedure for P6SMB51CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHM3/H Tags
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