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Vishay General Semiconductor - Diodes Division P6SMB120CAHM3_B/I
- Part No.:
- P6SMB120CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB120CAHM3_B/I.pdf
- Description:
- 600W,120V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,131
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Product details
Overview
P6SMB120CAHM3_B/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 or power lines. It features a 120 V standoff voltage (VWM), 137 V maximum clamping voltage (VC) at 3.6 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB120CAHM3_B/I datasheet, P6SMB120CAHM3_B/I pinout, P6SMB120CAHM3_B/I application, or P6SMB120CAHM3_B/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 transient immunity requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown threshold (VBR = 114–126 V), it rapidly transitions to low-impedance conduction to divert surge current away from downstream circuitry. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity sensitivity.
Thermal design relies on its SMB package's RθJA of 100 °C/W and RθJL of 20 °C/W, requiring minimum 0.2" × 0.2" copper pads per terminal for rated 600 W pulse handling. The halogen-free, RoHS-compliant HM3 suffix confirms JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity rating (peak reflow 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping onset. |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on under transients. |
| VC (Clamping Voltage) | 137 V at IPPM = 3.6 A - Peak voltage seen by protected circuit during full-rated 600 W surge; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 μs) - Sustains single high-energy surges common in automotive load-dump or lightning-induced events. |
| ID (Reverse Leakage) | 1.0 μA at VWM - Negligible standby current; avoids signal distortion or battery drain in always-on systems. |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity event) | Conducts surge current into device during negative-going transients; connects to protected line. |
| Cathode | Transient current entry (positive polarity event) | Conducts surge current into device during positive-going transients; connects to protected line. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V industrial buses or CAN FD lines. |
| AEC-Q101 qualified (HM3_B/I) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.15) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V MCU I/O below destructive thresholds. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector interface to clamp transients before reaching ASIC or microcontroller input pins. Use Value: Prevents latch-up or gate oxide damage in automotive-grade MCUs by limiting transient voltage to ≤137 V during 100 A load dump events. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on dry-contact or optocoupler input channels. Use Value: Maintains functional safety integrity by ensuring >100,000 surge cycles without degradation - validated per AEC-Q101. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Surge protection on RS-485/RS-422 differential data lines in base station backhaul equipment exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pair, referenced to local ground plane. Use Value: Preserves signal integrity with <1 pF junction capacitance at zero bias, enabling reliable 10 Mbps operation post-surge. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Snubber-style TVS across motor terminals to absorb inductive kickback energy. Use Value: Eliminates need for external RC snubbers - reduces BOM count while meeting IEC 61000-4-4 EFT immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120CA | Same VWM (102 V), lower PPPM (400 W), SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for AEC-Q101 automotive use | Select when cost sensitivity outweighs automotive qualification and 600 W surge headroom. |
| SMCJ120CA | Same VWM (102 V), higher PPPM (1500 W), larger SMC package (RθJA = 50 °C/W) | Overqualified for space-constrained PCBs; requires larger pad layout and higher assembly cost | Choose only when system-level surge testing exceeds IEC 61000-4-5 Level 4 or demands extended thermal margin. |
Compared with SMAJ120CA and SMCJ120CA, P6SMB120CAHM3_B/I delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, and SMB footprint - making it the preferred choice for automotive and industrial designs where board area, reliability, and standardized surge immunity must coexist.
Availability
P6SMB120CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB120CAHM3_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, 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 robustness under repetitive surge stress and extreme ambient temperatures.
FAQ
What is the clamping voltage of P6SMB120CAHM3_B/I at its rated peak pulse current?
The P6SMB120CAHM3_B/I has a maximum clamping voltage (VC) of 137 V at its rated peak pulse current (IPPM) of 3.6 A with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during full-rated surge events - a critical parameter for ensuring downstream IC survival in automotive and industrial applications.
Is P6SMB120CAHM3_B/I suitable for automotive applications?
Yes, P6SMB120CAHM3_B/I is AEC-Q101 qualified (indicated by the HM3_B/I suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD verification. Its 150 °C maximum junction temperature and MSL Level 1 rating further confirm suitability for under-hood and body-control module deployments where P6SMB120CAHM3_B/I provides certified transient protection.
How does the bidirectional configuration of P6SMB120CAHM3_B/I affect its PCB layout?
The bidirectional configuration of P6SMB120CAHM3_B/I eliminates polarity marking - the device has no cathode band and can be mounted in either orientation across a differential line or ungrounded signal path. This simplifies automated placement and reduces risk of assembly error, especially in compact layouts like CAN FD or RS-485 interfaces where P6SMB120CAHM3_B/I is commonly used.
What is the thermal resistance of P6SMB120CAHM3_B/I, and how does it impact surge handling?
P6SMB120CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" copper pads per terminal. Proper pad layout is essential: undersized pads increase thermal impedance, causing junction temperature to exceed 150 °C during repeated 600 W surges - potentially degrading P6SMB120CAHM3_B/I reliability over time.
Does P6SMB120CAHM3_B/I meet industry surge immunity standards?
Yes, P6SMB120CAHM3_B/I supports compliance with IEC 61000-4-2 (ESD ±8 kV contact), IEC 61000-4-4 (EFT ±2 kV), and IEC 61000-4-5 (surge ±2 kV line-earth, ±1 kV line-line) when applied per recommended layout guidelines. Its 600 W peak pulse rating and 137 V clamping voltage enable system-level pass-fail validation for these standards - a key reason P6SMB120CAHM3_B/I is selected in certified industrial and automotive designs.
P6SMB120CAHM3_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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- 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)
P6SMB120CAHM3_B/I FAQ
1.How can I place an order for P6SMB120CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB120CAHM3_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 P6SMB120CAHM3_B/I reliable?
The price and inventory of P6SMB120CAHM3_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 P6SMB120CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB120CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB120CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB120CAHM3_B/I?
P6SMB120CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB120CAHM3_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 P6SMB120CAHM3_B/I?
For technical support, including P6SMB120CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB120CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB120CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB120CAHM3_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 P6SMB120CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB120CAHM3_B/I?
All P6SMB120CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB120CAHM3_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 P6SMB120CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB120CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB120CAHM3_B/I Tags
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