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Vishay General Semiconductor - Diodes Division P6SMB39CA-E3/5B
- Part No.:
- P6SMB39CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CA-E3/5B.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,098
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Product details
Overview
P6SMB39CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 39 V standoff voltage (VWM), 43.3 V minimum breakdown voltage (VBR), 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive, industrial, and telecom sensor interface circuits.
For engineers reviewing the P6SMB39CA-E3/5B datasheet, P6SMB39CA-E3/5B pinout, P6SMB39CA-E3/5B application, or P6SMB39CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.25), RoHS-compliant matte tin terminations, SMB (DO-214AA) package compatibility with automated SMT assembly, and AEC-Q101 qualification readiness via HE3/HM3 variants.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity - critical for AC-coupled or floating signal lines. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), while the low incremental surge resistance supports consistent energy absorption across repetitive transients.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.100 %/°C temperature coefficient of VBR, enabling predictable voltage drift over thermal range. Mounted on standard 5.0 mm × 5.0 mm copper pads, it achieves 100 °C/W junction-to-ambient thermal resistance - suitable for moderate-power surge suppression without heatsinking in most PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33.3 V - maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1.0 mA - sharp, repeatable avalanche onset ensuring reliable triggering during transients |
| VC (Clamping Voltage) | 53.9 V at 11.1 A IPPM - limits downstream voltage stress to safe levels for protected ICs like microcontrollers or RS-485 transceivers |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 μs waveform - sustains high-energy surges such as IEC 61000-4-5 Level 4 (4 kV/2 Ω) |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - negligible standby current, preserving battery life and signal integrity in low-power sensor nodes |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height |
| Temperature Coefficient | +0.100 %/°C - enables accurate derating calculations for operation up to +150 °C junction temperature |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration with cathode/anode interchangeable per circuit orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in layout |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware placement in differential or AC lines |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 surge test profiles up to Level 4 without degradation when properly mounted |
| Glass passivated junction | Ensures long-term stability of leakage current and breakdown voltage under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning or special handling |
| RoHS-compliant matte tin plating | Meets J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 - supports high-reliability production |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or between signal and ground to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to automotive-grade MCUs and analog front-ends while maintaining signal fidelity during normal operation. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation networks exposed to ESD and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed differentially across A/B lines and/or common-mode to ground to suppress common- and differential-mode transients simultaneously. Use Value: Enables >25 kV HBM ESD immunity and sustained operation under IEC 61000-4-4 fast transient bursts without communication interruption. |
| Consumer USB Port Protection | Telecom DSL Line Protection |
|
Use Scenario: Shielding USB 2.0 data lines (D+/D−) in set-top boxes and smart home hubs against contact ESD and system-level coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS installed in series with each data line to limit voltage excursion without distorting 480 Mbps signaling. Use Value: Maintains signal integrity (jitter <1% UI) while meeting IEC 61000-4-2 Level 4 (±8 kV contact) compliance without added series impedance. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers and receivers in residential gateways subjected to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Connected between tip/ring and ground to absorb longitudinal surges up to 1 kV/10 Ω per ITU-T K.21 recommendations. Use Value: Extends service life of line interface ICs by limiting peak voltage to <55 V - well below absolute maximum ratings of typical SLIC devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Lower VWM (33 V), lower PPPM (400 W), same SMB package and bidirectional function | Suitable for 3.3 V–5 V logic rails where tighter clamping margin is required but energy handling is reduced | Select when surge energy is limited to <400 W and lower clamping voltage is prioritized over peak power headroom |
| SMCJ36CA | Higher PPPM (1500 W), larger SMC (DO-214AB) package, VWM = 36 V, VC = 58.1 V at 25.9 A | Used in high-energy industrial motor drives or PoE injectors where PCB space allows larger footprint | Choose when protecting 24 V–48 V systems requiring >1 kV surge immunity and higher single-pulse energy tolerance |
Compared with P6SMB39CA-E3/5B, SMAJ33CA offers tighter voltage control at lower surge capacity, while SMCJ36CA delivers 2.5× peak power in a larger package - making P6SMB39CA-E3/5B the optimal balance of 600 W capability, SMB footprint, and 33.3 V–53.9 V clamping window for mid-range industrial and automotive interfaces.
Availability
P6SMB39CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom DSL line cards requiring stable component supply with full traceability and RoHS compliance.
Supply support for P6SMB39CA-E3/5B 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, automotive qualification, and high-volume manufacturability.
The P6SMB Series targets cost-sensitive yet robust transient suppression in automotive, industrial, and communications equipment - engineered for automated SMT assembly, MSL Level 1 reflow, and long-term stability under thermal and electrical stress.
FAQ
What is the clamping voltage of P6SMB39CA-E3/5B at its rated peak pulse current?
The P6SMB39CA-E3/5B has a maximum clamping voltage (VC) of 53.9 V at 11.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and reflects the upper voltage limit imposed on protected circuitry during a surge event. The P6SMB39CA-E3/5B maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is P6SMB39CA-E3/5B suitable for automotive applications?
P6SMB39CA-E3/5B itself is RoHS-compliant commercial-grade; however, the P6SMB39CA-HE3 variant (AEC-Q101 qualified) shares identical electrical specs and SMB packaging. Engineers deploying P6SMB39CA-E3/5B in automotive contexts should verify qualification status per ordering code and consult Vishay's AEC-Q101 documentation. The P6SMB39CA-E3/5B base design meets core automotive environmental requirements including 150 °C TJ max and MSL Level 1 reflow.
How does the bidirectional nature of P6SMB39CA-E3/5B affect PCB layout?
The bidirectional structure of P6SMB39CA-E3/5B eliminates polarity constraints: either terminal may connect to signal or return, simplifying layout for differential pairs or AC-coupled lines. No cathode band marking is present, and the SMB footprint requires only two symmetric SMT pads per device. This reduces routing complexity and avoids orientation errors during automated assembly - a direct benefit of using P6SMB39CA-E3/5B instead of unidirectional alternatives.
What is the thermal resistance of P6SMB39CA-E3/5B, and how does it impact power dissipation?
P6SMB39CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads. At its rated DC power dissipation (PD) of 5.0 W, this yields a 500 °C rise above ambient - which exceeds its 150 °C TJ max. Therefore, P6SMB39CA-E3/5B is intended for transient, not continuous, power dissipation; steady-state heating is managed by its low ID leakage (<1.0 μA), not PD rating.
Can P6SMB39CA-E3/5B replace unidirectional TVS diodes in existing designs?
P6SMB39CA-E3/5B can replace unidirectional TVS diodes only if the circuit topology supports bidirectional clamping - e.g., across floating lines or ground-referenced signals where reverse conduction is acceptable. Unlike unidirectional types (e.g., P6SMB39A), the P6SMB39CA-E3/5B conducts in both directions above VBR, so it must not be used in series with DC-blocking capacitors or in rectifier paths. Verify signal polarity and bias conditions before substituting P6SMB39CA-E3/5B.
P6SMB39CA-E3/5B 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- 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 (SMB)
P6SMB39CA-E3/5B FAQ
1.How can I place an order for P6SMB39CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CA-E3/5B 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 P6SMB39CA-E3/5B reliable?
The price and inventory of P6SMB39CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB39CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CA-E3/5B?
P6SMB39CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CA-E3/5B 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 P6SMB39CA-E3/5B?
For technical support, including P6SMB39CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB39CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB39CA-E3/5B 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 P6SMB39CA-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB39CA-E3/5B?
All P6SMB39CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CA-E3/5B, 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 P6SMB39CA-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB39CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CA-E3/5B Tags
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