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Vishay General Semiconductor - Diodes Division P6SMB51CAHM3_B/I
- Part No.:
- P6SMB51CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHM3_B/I.pdf
- Description:
- 600W,51V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,981
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Product details
Overview
P6SMB51CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), with a 43.6 V standoff voltage (VWM) and 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces, industrial I/O modules, and telecom front-end circuits against ESD and inductive switching transients.
For engineers reviewing the P6SMB51CAHM3_B/I datasheet, P6SMB51CAHM3_B/I pinout, P6SMB51CAHM3_B/I application, or P6SMB51CAHM3_B/I equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified bidirectional clamping performance, low incremental surge resistance, and MSL Level 1 reflow compatibility up to 260 °C - critical for high-reliability automotive and industrial PCB designs.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown behavior in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), while the SMB package supports automated placement and meets UL 94 V-0 flammability requirements.
The P6SMB51CAHM3_B/I is thermally characterized with RθJA = 100 °C/W and RθJL = 20 °C/W, and is rated for continuous operation from −65 °C to +150 °C. Its 0.01% duty cycle rating and 600 W peak pulse capability are validated per IEC 61000-4-5 and ISO 7637-2 standards for repetitive surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43.6 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (Breakdown) | 48.5–53.6 V at 1.0 mA - Confirmed voltage range where device transitions into avalanche conduction |
| VC (Clamping) | 70.1 V at 8.6 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge |
| PPPM | 600 W - Sustains standardized lightning/surge pulses without failure; enables compact board-level protection |
| Leakage (ID) | <1.0 μA at VWM - Negligible standby current draw; preserves signal integrity in high-impedance nodes |
| TJ max | +150 °C - Supports under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated terminals, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity constraints |
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in automotive load-dump and industrial motor switching |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns; compatible with standard lead-free assembly processes |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for global automotive and industrial markets |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs during surge events |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from ESD and battery line transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp ±25 kV ESD and 100 V load-dump spikes. Use Value: Prevents latch-up or damage to transceivers while maintaining signal integrity due to low capacitance and symmetrical clamping. |
Use Scenario: Safeguarding PLC digital input modules exposed to inductive kickback from solenoid valves and relays. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to shunt surge energy before reaching optocoupler inputs. Use Value: Enables reliable operation in harsh factory environments with repeated 600 W surges, validated per IEC 61000-4-4. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding Ethernet PHYs and PoE controllers from lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices on each twisted pair to suppress common-mode transients up to ±1 kV. Use Value: Maintains IEEE 802.3af/at compliance with sub-1 ns response and clamping below PHY absolute maximum ratings. |
Use Scenario: Secondary-side transient suppression on 5 V/12 V USB-C and barrel jack outputs in wall adapters. IC Role / Device Role / Timing Role: Final-stage TVS between output rail and ground to absorb plug/unplug spikes and ESD events. Use Value: Eliminates need for additional filtering components; certified to UL 62368-1 with VC < 75 V at rated current. |
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 VWM (43.6 V) and VC (70.1 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when board space is constrained and surge threat level is ≤400 W |
| 1.5KE51CA | Higher PPPM (1500 W), axial-leaded DO-201 package; VC = 88.0 V at 17.1 A | Requires through-hole mounting; unsuitable for high-density SMT layouts | Choose for legacy designs or where mechanical robustness outweighs SMT automation needs |
Compared with SMAJ51CA and 1.5KE51CA, the P6SMB51CAHM3_B/I delivers optimal balance of AEC-Q101 qualification, 600 W surge handling, SMB footprint compatibility, and low-profile SMT assembly - making it the preferred choice for new automotive and industrial designs requiring production scalability and thermal reliability.
Availability
P6SMB51CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital 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_B/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 optimization.
The P6SMB Series is designed for robust, high-power transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance across temperature and lifetime while meeting stringent AEC-Q101 and RoHS requirements.
FAQ
What is the clamping voltage of P6SMB51CAHM3_B/I at its rated peak pulse current?
The P6SMB51CAHM3_B/I has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures downstream ICs remain within safe operating voltage limits during surge events. The P6SMB51CAHM3_B/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).
Is P6SMB51CAHM3_B/I suitable for automotive applications?
Yes, P6SMB51CAHM3_B/I is AEC-Q101 qualified and manufactured with the HM3 suffix, indicating halogen-free, RoHS-compliant construction and validation for automotive-grade reliability. It is specifically intended for use in engine control units, ADAS sensor interfaces, and body electronics where immunity to load dump, ESD, and ISO 7637-2 pulses is required. The P6SMB51CAHM3_B/I undergoes temperature cycling, HTRB, and surge testing per AEC-Q101 Rev D.
How does the bidirectional configuration of P6SMB51CAHM3_B/I affect its circuit placement?
The bidirectional configuration of P6SMB51CAHM3_B/I means it has no polarity marking and functions identically regardless of orientation across a protected node - ideal for AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating grounds. Unlike unidirectional TVS diodes, the P6SMB51CAHM3_B/I clamps surges of either polarity symmetrically, eliminating layout errors due to incorrect cathode/anode placement and simplifying design reuse across signal types.
What is the thermal resistance of P6SMB51CAHM3_B/I, and how does it impact PCB layout?
The P6SMB51CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks. The P6SMB51CAHM3_B/I's low RθJL supports efficient heat transfer to the PCB plane, especially critical in high-density automotive modules.
Does P6SMB51CAHM3_B/I meet moisture sensitivity and reflow requirements for modern SMT assembly?
Yes, P6SMB51CAHM3_B/I is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C for lead-free processes. Its molding compound meets UL 94 V-0 flammability, and terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. No baking or special handling is required prior to assembly - the P6SMB51CAHM3_B/I is fully compatible with standard high-volume SMT lines used in automotive and industrial manufacturing.
P6SMB51CAHM3_B/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:
- 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/I FAQ
1.How can I place an order for P6SMB51CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHM3_B/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_B/I reliable?
The price and inventory of P6SMB51CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHM3_B/I?
P6SMB51CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHM3_B/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_B/I?
For technical support, including P6SMB51CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB51CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHM3_B/I?
All P6SMB51CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for P6SMB51CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHM3_B/I Tags
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