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Vishay General Semiconductor - Diodes Division P6SMB51CAHM3_B/H
- Part No.:
- P6SMB51CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHM3_B/H.pdf
- Description:
- 600W,51V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,370
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Product details
Overview
P6SMB51CAHM3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, 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), 43.6 V standoff voltage (VWM), 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 - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the P6SMB51CAHM3_B/H datasheet, P6SMB51CAHM3_B/H pinout, P6SMB51CAHM3_B/H application, or P6SMB51CAHM3_B/H equivalent, this device delivers AEC-Q101 qualified surge protection in halogen-free, RoHS-compliant packaging with MSL Level 1 moisture sensitivity and 150 °C max junction temperature - critical for under-hood automotive modules and high-reliability industrial control systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance supports fast clamping response under repetitive transients.
The device is rated for 600 W peak pulse power (10/1000 µs), derated linearly above 25 °C ambient per Fig. 2, and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.102 %/°C VBR temperature coefficient ensures predictable voltage drift over automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| 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 600 W transient, limiting downstream IC stress |
| PPPM | 600 W (10/1000 µs) - peak surge energy handling capacity compliant with ISO 7637-2 and IEC 61000-4-5 |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No marking - symmetrical terminals enable polarity-agnostic placement on PCB |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | No marking - identical physical terminal as Anode; bidirectional operation requires no orientation check |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails without polarity concerns |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surges when mounted per recommended pad layout |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS | Meets JESD201 Class 2 whisker resistance and global environmental compliance requirements for Tier 1 supply chains |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between transceiver pins and connector interface. Use Value: Limits transient voltage to ≤70.1 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V transceivers. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid coils or relay contacts. IC Role / Device Role / Timing Role: Primary surge suppression element on 24 V DC input channel before optocoupler or MCU GPIO. Use Value: Absorbs 600 W pulses without degradation, maintaining signal integrity during factory automation equipment switching cycles. |
| Telecom Line Driver Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Shielding xDSL or Ethernet PHY line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage clamping device on differential pair, upstream of common-mode chokes and secondary TVS arrays. Use Value: Fast response (<1 ns) and symmetrical VBR ensure balanced clamping across both conductors, preserving signal symmetry. |
Use Scenario: Adding secondary-level surge immunity to USB-C or barrel-jack inputs in smart home hubs and audio adapters. IC Role / Device Role / Timing Role: Secondary TVS after primary fuse and MOV, providing precise low-voltage clamping for downstream DC-DC converters. Use Value: 43.6 V VWM allows safe operation with 36 V max adapter output while clamping 1 kV ESD events to <70 V. |
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 range (48.5–53.6 V) but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at 100% duty cycle. |
| 1.5KE51CA | Higher PPPM = 1500 W but axial DO-201 package; slower response due to higher parasitic inductance | Requires through-hole mounting; not suitable for high-speed signal lines or automated SMT lines | Choose for legacy designs or high-energy industrial mains protection where SMT is not required. |
Compared with SMAJ51CA and 1.5KE51CA, P6SMB51CAHM3_B/H uniquely balances 600 W surge capability, SMB surface-mount compatibility, AEC-Q101 qualification, and bidirectional symmetry - making it optimal for next-generation automotive and industrial SMT designs requiring validated reliability and compact layout.
Availability
P6SMB51CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial programmable logic controllers, and telecom line interface cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB51CAHM3_B/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets 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_B/H?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB51CAHM3_B/H provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P6SMB51A), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC-coupled or differential signal protection.
Is P6SMB51CAHM3_B/H suitable for automotive applications?
Yes, P6SMB51CAHM3_B/H is AEC-Q101 qualified (as indicated by the "_B/H" suffix per Vishay's ordering table), tested for temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. It is specifically intended for under-hood and chassis-mounted modules where sustained operation up to +150 °C and immunity to load dump transients are required.
How does the "HM3" in P6SMB51CAHM3_B/H differ from "E3" or "M3"?
The "HM3" suffix identifies P6SMB51CAHM3_B/H as halogen-free, RoHS-compliant, and AEC-Q101 qualified - distinguishing it from commercial-grade "E3" (RoHS only) and "M3" (halogen-free/RoHS) variants. The "H" denotes 7" tape-and-reel packaging (750 units/reel), while "B" confirms AEC-Q101 qualification for the 6.8–220 V range, as documented in Vishay's revision 09-Jan-2024 datasheet.
What is the maximum clamping voltage of P6SMB51CAHM3_B/H under surge conditions?
The maximum clamping voltage (VC) of P6SMB51CAHM3_B/H is 70.1 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standardized test conditions and represents the upper limit of voltage seen by downstream circuitry during a 600 W transient event - critical for ensuring protected ICs remain within absolute maximum ratings.
Can P6SMB51CAHM3_B/H replace P6SMB51A in an existing design?
No - P6SMB51CAHM3_B/H is bidirectional, whereas P6SMB51A is unidirectional and features a cathode band for polarity orientation. Substituting them requires verifying circuit topology: P6SMB51CAHM3_B/H may be used only where symmetrical clamping is needed (e.g., differential lines), and PCB layout must omit polarity-dependent routing. Direct replacement without analysis risks improper protection or forward conduction in DC-biased paths.
P6SMB51CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- 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):
- 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_B/H FAQ
1.How can I place an order for P6SMB51CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHM3_B/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_B/H reliable?
The price and inventory of P6SMB51CAHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHM3_B/H?
P6SMB51CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHM3_B/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_B/H?
For technical support, including P6SMB51CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB51CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHM3_B/H?
All P6SMB51CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for P6SMB51CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHM3_B/H Tags
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