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Vishay General Semiconductor - Diodes Division P6SMB120CA-E3/52
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- Part No.:
- P6SMB120CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB120CA-E3/52.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,609
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Product details
Overview
P6SMB120CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 120 V standoff voltage (VWM), 165 V clamping voltage (VC) at 3.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform). It protects sensitive signal lines and power rails in automotive sensor units, industrial I/O interfaces, and telecom line cards against ESD and inductive switching transients.
For engineers reviewing the P6SMB120CA-E3/52 datasheet, P6SMB120CA-E3/52 pinout, P6SMB120CA-E3/52 application, or P6SMB120CA-E3/52 equivalent, this device delivers verified bidirectional clamping performance with AEC-Q101 qualification options, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability PCB assembly and automotive-grade transient suppression design.
Technical Context
The P6SMB120CA-E3/52 operates as a symmetrical avalanche diode, providing identical clamping behavior in both forward and reverse directions due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns) to transient events.
Designed for surface-mount placement on standard 0.2" × 0.2" copper pads, it achieves thermal resistance of 100 °C/W (junction-to-ambient) and supports repetitive surge duty cycles up to 0.01 % at TA = 25 °C. The device maintains stable VBR (114–126 V) with ±5 % tolerance at IT = 1 mA and exhibits a temperature coefficient of +0.107 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - Maximum continuous reverse voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 114–126 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on under transient stress. |
| VC (Clamping Voltage) | 165 V at IPPM = 3.6 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits downstream stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability without failure; validated per IEC 61000-4-5 waveform. |
| ID (Reverse Leakage) | 1.0 μA max at VWM = 102 V - Negligible standby current; avoids loading of high-impedance signal paths. |
| TJ max | 150 °C - Maximum junction temperature rating; enables operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current in either direction; connects to line being protected (e.g., RS-485 A/B, CAN H/L). |
| Cathode | Transient current entry (bidirectional) | Paired terminal completing symmetrical clamping path; ties to common reference (GND or VCC rail). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for orientation-aware layout; simplifies protection of AC-coupled or differential lines. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without degradation - suitable for industrial fieldbus and automotive body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes overvoltage exposure during clamping - preserves margin for 120 V-rated ICs and MOSFETs downstream. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without pre-baking - reduces manufacturing complexity and cost in high-volume production. |
| AEC-Q101 qualification option | Available in HE3/HM3 variants - enables direct use in automotive applications requiring qualified TVS components (e.g., ADAS sensor modules). |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt transients before reaching MCU or analog front-end. Use Value: Maintains signal integrity under 100 V/100 ms load dump events while adding <0.5 mm² PCB area - critical for compact ECU designs. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., SN65HVD230) in factory automation PLCs exposed to motor drive noise and cable ESD. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on differential A/B bus lines to suppress common-mode and differential-mode surges. Use Value: Clamps 165 V peak within 1 ns, preventing latch-up or permanent damage to transceivers rated for ≤20 V common-mode range. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Primary-level TVS on secondary side of isolation transformers to absorb induced common-mode energy before reaching PHY IC. Use Value: Withstands 600 W pulses without parameter shift - extends field life in unattended base station deployments. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Across-motor terminals or between motor driver outputs and GND to clamp inductive kickback during PWM commutation. Use Value: Limits voltage overshoot to 165 V, enabling use of 200 V-rated MOSFETs instead of costly 250 V+ devices - reducing BOM cost by ~12 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | Same SMB package, identical VWM (102 V) and VC (165 V), but rated for 600 W with tighter VBR tolerance (5 % vs. P6SMB120CA's 8.3 %); slightly higher IPPM (3.7 A). | Preferred where tighter parametric consistency is required across temperature; no change in PCB layout or thermal design. | Select SMBJ120CA when statistical process control demands tighter VBR distribution in high-volume automotive production. |
| 1.5SMC120CA | Larger SMC (DO-214AB) package; same electrical specs (VWM = 102 V, VC = 165 V, PPPM = 600 W), but higher thermal mass and RθJA = 60 °C/W. | Better suited for high-temperature ambient environments (>105 °C) or infrequent high-energy surges where heat dissipation dominates. | Choose 1.5SMC120CA only if board space allows larger footprint and thermal derating is critical - not a drop-in replacement. |
Compared with SMBJ120CA and 1.5SMC120CA, the P6SMB120CA-E3/52 offers optimal balance of compact SMB footprint, AEC-Q101 availability, and cost-effective transient suppression for space-constrained industrial and automotive modules - without compromising clamping performance or reliability.
Availability
P6SMB120CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom line card surge suppression requiring stable component supply, RoHS-compliant materials, and consistent lot-to-lot clamping performance.
Supply support for P6SMB120CA-E3/52 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, and protection devices with emphasis on reliability, ruggedness, and automotive qualification.
The P6SMB Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and telecom systems - delivering standardized TVS performance in compact surface-mount packages with scalable qualification paths.
FAQ
What is the maximum clamping voltage of the P6SMB120CA-E3/52 under a 10/1000 μs surge?
The P6SMB120CA-E3/52 has a maximum clamping voltage (VC) of 165 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 3.6 A. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during such a transient event. The P6SMB120CA-E3/52 maintains this clamping performance consistently due to its glass-passivated junction and symmetrical bidirectional structure.
Is the P6SMB120CA-E3/52 suitable for automotive applications?
Yes - while the base P6SMB120CA-E3/52 is commercial-grade, Vishay offers AEC-Q101 qualified versions under ordering codes like P6SMB120CAHE3_B, which share identical electrical specs and SMB packaging. These qualified variants undergo stress testing for temperature cycling, humidity, and mechanical shock, making them suitable for automotive body electronics and sensor modules. The P6SMB120CA-E3/52 itself is widely used in pre-qualification designs and non-safety-critical automotive subsystems.
How does the bidirectional nature of the P6SMB120CA-E3/52 affect PCB layout?
The P6SMB120CA-E3/52 has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for differential or AC-coupled signals (e.g., CAN, RS-485, audio lines), removes risk of reverse installation, and allows symmetric routing without dedicated anode/cathode trace assignments. The P6SMB120CA-E3/52 thus reduces design review cycles and improves first-pass yield in high-density layouts.
What is the thermal resistance of the P6SMB120CA-E3/52, and how does it impact power handling?
The P6SMB120CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. This means a 5.0 W steady-state power dissipation would raise junction temperature by 500 °C above ambient - far exceeding its 150 °C max rating. Therefore, the P6SMB120CA-E3/52 is intended for transient-only operation; its 600 W rating applies only to short-duration pulses (≤1 ms), not continuous DC power. Proper pad sizing is essential to maintain specified surge capability.
Does the P6SMB120CA-E3/52 require external series impedance for effective protection?
No - the P6SMB120CA-E3/52 operates as a shunt protector and does not require series impedance to function. However, adding a small series resistor (e.g., 1–10 Ω) or ferrite bead between the protected node and the P6SMB120CA-E3/52 can improve filtering of high-frequency ringing and reduce peak current stress on the diode during very fast transients (<10 ns). Such components are optional and application-dependent; the P6SMB120CA-E3/52 delivers full specified clamping performance without them.
P6SMB120CA-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB120CA-E3/52 FAQ
1.How can I place an order for P6SMB120CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB120CA-E3/52 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 P6SMB120CA-E3/52 reliable?
The price and inventory of P6SMB120CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB120CA-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB120CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB120CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB120CA-E3/52?
P6SMB120CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB120CA-E3/52 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 P6SMB120CA-E3/52?
For technical support, including P6SMB120CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB120CA-E3/52 requirements.
6.How does Aetrix verify that P6SMB120CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB120CA-E3/52 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 P6SMB120CA-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB120CA-E3/52?
All P6SMB120CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB120CA-E3/52, 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 P6SMB120CA-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB120CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB120CA-E3/52 Tags
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