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Vishay General Semiconductor - Diodes Division P6SMB120A-M3/52
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- Part No.:
- P6SMB120A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB120A-M3/52.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,325
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Product details
Overview
P6SMB120A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 120 V breakdown voltage (VBR = 114–126 V at IT = 1.0 mA), 165 V maximum clamping voltage (VC) at 3.6 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD events.
For engineers reviewing the P6SMB120A-M3/52 datasheet, P6SMB120A-M3/52 pinout, P6SMB120A-M3/52 application, or P6SMB120A-M3/52 equivalent, this device delivers verified unidirectional clamping performance in SMB (DO-214AA) package with halogen-free, RoHS-compliant construction, MSL Level 1 rating, and AEC-Q101 qualification availability - critical for automotive, industrial, and telecom power rail protection design-in.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA reverse leakage at 102 V), then rapidly avalanches when transient voltage exceeds its 120 V nominal breakdown threshold. Its low incremental surge resistance ensures minimal voltage overshoot during 3.6 A transient events, while its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad layout (0.2" × 0.2") for sustained 5.0 W power dissipation.
The device uses a glass-passivated silicon junction for stable, repeatable clamping behavior across -65 °C to +150 °C operating temperature range. Its unidirectional polarity - marked by cathode band - enables integration into DC-biased circuits without forward conduction concerns, unlike bidirectional variants which lack polarity marking and support AC-coupled protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 114 V / 126 V at 1.0 mA test current - defines precise avalanche onset window for reliable overvoltage triggering |
| VWM | 102 V - maximum continuous reverse working voltage; circuit must stay below this to avoid leakage or premature conduction |
| VC @ IPPM | 165 V at 3.6 A peak pulse - clamping voltage seen by protected load during worst-case 10/1000 µs transient |
| PPPM | 600 W - peak pulse power handling capacity with 0.01% duty cycle; determines survivability of repetitive surges |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine); supports inrush or fault-current tolerance in DC paths |
| TJ max. | +150 °C - maximum junction temperature; sets thermal derating limit for ambient and PCB copper design |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 0.220" × 0.130" footprint and matte tin-plated leads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Cathode indicated by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference node | Connected to lower-potential side (e.g., GND or return path); defines directionality of clamping action |
| Cathode | Avalanche conduction terminal / clamping output node | Connected to protected line (e.g., 12 V rail); conducts transient energy to anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like ISO 7637-2 Pulse 1/2a/5a without thermal runaway |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity stress |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with automated placement and high-volume manufacturing |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end-equipment certifications |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving margin for downstream ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V supply lines in engine control units (ECUs) and body electronics from load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and ground, triggered within nanoseconds upon voltage excursion beyond 102 V. Use Value: Limits rail voltage to ≤165 V during 3.6 A transients, preventing damage to microcontrollers, CAN transceivers, and power management ICs. |
Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, or position sensors exposed to cable-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected in series with signal line or across input-to-ground, absorbing fast transients before they reach precision amplifiers. Use Value: Maintains signal integrity by clamping sub-µs EFT bursts to <165 V while adding only ~10 pF capacitance at 0 V bias. |
| Telecom DC Power Input Protection | Consumer Equipment DC Adapter Input Protection |
|
Use Scenario: Securing 48 V DC input of PoE-powered switches, base stations, or remote radio units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input, coordinated with upstream fuses and secondary-stage filtering components. Use Value: Withstands repeated 600 W pulses per IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs), preserving system uptime. |
Use Scenario: Hardening USB-C PD or barrel-jack DC inputs of smart home hubs, set-top boxes, and audio amplifiers against adapter fault conditions and ESD. IC Role / Device Role / Timing Role: Standalone overvoltage clamp on input rail, selected for cost-effective, space-constrained board-level protection. Use Value: Halogen-free M3 construction supports global regulatory compliance; SMB footprint enables compact layout without discrete mounting hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120A | Same VBR range (114–126 V), but lower PPPM = 400 W and higher VC = 193 V at 3.1 A | Limited to lower-energy transients; less margin for ISO 7637-2 Pulse 5a | Select when cost or legacy design constraints prioritize SMA package over SMB's higher power density |
| 1.5SMC120A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, VC = 165 V at 7.2 A | Requires more PCB area; suited for primary-level surge where 600 W is insufficient | Choose for enhanced robustness in harsh environments (e.g., railway or grid infrastructure), accepting larger footprint |
Compared with SMAJ120A, P6SMB120A-M3/52 delivers 50% higher pulse power and tighter clamping; versus 1.5SMC120A, it offers identical clamping voltage in a 30% smaller SMB package - optimizing board space while maintaining full automotive-grade surge immunity.
Availability
P6SMB120A-M3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer DC adapters requiring stable component supply with halogen-free compliance and MSL Level 1 manufacturability.
Supply support for P6SMB120A-M3/52 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, power efficiency, and automotive qualification.
The P6SMB Series targets high-reliability transient suppression in space-constrained applications, engineered specifically for AEC-Q101 readiness, automated assembly, and consistent clamping performance across extended temperature ranges.
FAQ
What is the maximum clamping voltage of the P6SMB120A-M3/52 under standard test conditions?
The P6SMB120A-M3/52 has a maximum clamping voltage (VC) of 165 V when subjected to its rated peak pulse current of 3.6 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C with specified PCB copper pad layout (0.2" × 0.2"), and represents the upper voltage limit imposed on the protected circuit during transient events. The P6SMB120A-M3/52 maintains this clamping performance consistently due to its glass-passivated junction and low incremental resistance.
Is the P6SMB120A-M3/52 suitable for automotive applications?
Yes - while the base P6SMB120A-M3/52 is commercial-grade, Vishay offers AEC-Q101 qualified versions under ordering codes such as P6SMB120AHM3_B/H (with "B" suffix indicating AEC-Q101 qualification). The P6SMB120A-M3/52 itself shares identical electrical characteristics and SMB package construction, enabling drop-in qualification-ready design migration. Its MSL Level 1 rating and halogen-free M3 construction further support automotive manufacturing requirements.
How does the P6SMB120A-M3/52 differ from bidirectional variants like P6SMB120CA?
The P6SMB120A-M3/52 is unidirectional and features a cathode band marking; it conducts only in reverse breakdown and blocks forward current above ~1.5 V. In contrast, P6SMB120CA is bidirectional with no polarity marking and symmetrical clamping in both directions - making it suitable for AC lines or differential signals. The P6SMB120A-M3/52's unidirectional nature provides lower leakage (<1.0 µA at 102 V) and avoids forward conduction in DC-biased rails, unlike the CA variant which exhibits leakage in both polarities.
What is the thermal resistance of the P6SMB120A-M3/52, and how does it affect layout?
The P6SMB120A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; exceeding 5.0 W continuous power dissipation requires thermal derating above 25 °C ambient. To maintain reliability, PCB layout must replicate the specified pad dimensions and avoid excessive trace narrowing between the P6SMB120A-M3/52 and copper planes.
Can the P6SMB120A-M3/52 be used in parallel for higher surge current handling?
No - the P6SMB120A-M3/52 is not characterized or recommended for parallel operation due to parameter spread in VBR (114–126 V) and dynamic impedance, which causes uneven current sharing and potential thermal runaway. For higher surge capability, Vishay specifies single-device solutions like the 1.5SMC120A (1500 W) or stacked TVS arrays. System-level protection should instead use coordinated staging (e.g., gas discharge tube + P6SMB120A-M3/52) rather than paralleling identical P6SMB120A-M3/52 units.
P6SMB120A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB120A-M3/52 FAQ
1.How can I place an order for P6SMB120A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB120A-M3/52 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 P6SMB120A-M3/52 reliable?
The price and inventory of P6SMB120A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB120A-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB120A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB120A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB120A-M3/52?
P6SMB120A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB120A-M3/52 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 P6SMB120A-M3/52?
For technical support, including P6SMB120A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB120A-M3/52 requirements.
6.How does Aetrix verify that P6SMB120A-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB120A-M3/52 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 P6SMB120A-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB120A-M3/52?
All P6SMB120A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB120A-M3/52, 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 P6SMB120A-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB120A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB120A-M3/52 Tags
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