My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB39CA-M3/5B
;;2.jpg)
- Part No.:
- P6SMB39CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CA-M3/5B.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,753
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB39CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P6SMB39CA-M3/5B datasheet, P6SMB39CA-M3/5B pinout, P6SMB39CA-M3/5B application, or P6SMB39CA-M3/5B equivalent, this device serves as a halogen-free, RoHS-compliant, bidirectional TVS for robust ESD and surge protection where low incremental surge resistance, fast response time (<1 ns), and AEC-Q101 qualification readiness are critical selection criteria.
Technical Context
The P6SMB39CA-M3/5B operates symmetrically in both directions due to its bidirectional construction, enabling transient suppression on AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
It delivers 600 W peak pulse power handling per the 10/1000 μs standard waveform, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting operation up to 150 °C junction temperature. The device is rated for 1.0 μA max reverse leakage at VWM, confirming tight voltage threshold control for sensitive line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Confirmed voltage range where device transitions into avalanche conduction; ensures predictable turn-on behavior. |
| VC (Clamping) | 53.9 V at 11.1 A - Maximum voltage seen across protected circuit during 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak transient energy absorption capacity; supports IEC 61000-4-5 Level 3/4 surge immunity testing. |
| IPPM | 11.1 A - Peak pulse current corresponding to VC; enables precise PCB trace and fuse sizing for surge path design. |
| TJ max. | 150 °C - Maximum junction temperature rating; allows use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; both ends function identically for transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line or node requiring clamping. |
| Cathode (Terminal 2) | Transient current return (bidirectional) | Completes low-impedance path to reference plane (e.g., ground or rail); identical functional role to Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge test requirements for industrial equipment and automotive ECUs with minimal derating. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure during transients - critical for protecting 3.3 V or 5 V logic interfaces. |
| Halogen-free, RoHS-compliant (M3 suffix) | Complies with environmental regulations and eliminates corrosive halogen emissions during board rework or end-of-life processing. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input or transceiver pins. Use Value: Clamps transients to ≤53.9 V while maintaining <1.0 μA leakage at 33.3 V, preserving signal integrity and preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Absorbs 600 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Line Card Surge Protection | Consumer Power Adapter ESD Protection |
|
Use Scenario: Shielding Ethernet PHY interface lines (e.g., MDI-X pairs) and auxiliary power rails from lightning-induced surges in DSL/cable modems. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary gas discharge tube (GDT) or polymer PTC, providing fast-response clamping. Use Value: Sub-nanosecond response time and 53.9 V clamping limit ensure Ethernet PHY ICs (e.g., Broadcom BCM54213) remain within absolute maximum ratings during combined-mode surges. |
Use Scenario: Guarding USB-C CC lines, VBUS monitoring circuits, and AC-DC controller feedback paths against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Final-stage ESD suppressor placed adjacent to connector pins, shunting >8 kV contact discharge away from power management ICs. Use Value: 1.0 μA max leakage at 33.3 V prevents false triggering of undervoltage lockout (UVLO), while 600 W rating handles multiple ESD strikes without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same SMB package, but 33 V VWM, 36.7–40.6 V VBR, 53.3 V VC at 11.3 A; lower clamping voltage by 0.6 V. | Marginally tighter clamping; preferred when protecting 3.3 V logic with narrow VCC–VIO headroom. | Select SMBJ33CA if system requires lowest possible clamping voltage near 33 V nominal rails; verify VBR min exceeds operating voltage by ≥10 %. |
| 1.5SMC39CA | Higher-power SMC package (1500 W), same 33.3 V VWM and 37.1–41.0 V VBR, but 60.0 V VC at 25.0 A; larger footprint (7.11 mm × 6.22 mm). | Used where higher surge repetition rate or longer-duration transients demand greater thermal mass and energy absorption. | Choose 1.5SMC39CA only when 600 W is insufficient - e.g., in motor drive gate driver protection - accepting larger PCB area and different layout. |
Compared with SMBJ33CA, P6SMB39CA-M3/5B offers slightly higher VWM margin for 36 V nominal systems, while 1.5SMC39CA trades compactness for higher energy handling - making P6SMB39CA-M3/5B optimal for space-constrained, cost-sensitive industrial and automotive modules requiring balanced clamping performance and manufacturability.
Availability
P6SMB39CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line cards, and consumer power adapter ESD protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for P6SMB39CA-M3/5B 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance, low leakage, and robust surge endurance are mandatory.
FAQ
What is the key difference between P6SMB39CA-M3/5B and unidirectional P6SMB39A-M3/5B?
The P6SMB39CA-M3/5B is bidirectional, meaning it clamps voltage transients equally in both polarities - ideal for AC-coupled lines like RS-485 or differential sensors. In contrast, P6SMB39A-M3/5B is unidirectional with a marked cathode band and only protects against reverse-polarity surges. Both share identical VWM (33.3 V), VBR (37.1–41.0 V), and VC (53.9 V), but P6SMB39CA-M3/5B has no polarity marking and must be placed without orientation concern. This makes P6SMB39CA-M3/5B more flexible in layout for symmetric protection schemes.
Does P6SMB39CA-M3/5B meet AEC-Q101 qualification?
The base P6SMB39CA-M3/5B is not AEC-Q101 qualified; however, Vishay offers AEC-Q101 variants under ordering codes such as P6SMB39CAHM3_B/5B (with "_B" suffix indicating AEC-Q101 qualification for VWM ≤ 220 V). The "M3" suffix confirms halogen-free and RoHS compliance, but automotive qualification requires explicit "HM3_B" or "HE3_B" in the full part number. Always verify the complete ordering code and consult Vishay's automotive-grade datasheet revision for qualification evidence before deployment in automotive applications.
What is the maximum PCB pad size recommended for P6SMB39CA-M3/5B to achieve rated 600 W pulse power?
To achieve the full 600 W peak pulse power rating, Vishay specifies mounting P6SMB39CA-M3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - matching the thermal test condition in Figure 2 of document 88370. Smaller pads increase thermal resistance and reduce surge capability; for example, reducing pad area to 0.1" × 0.1" may derate PPPM by ~30 %. The SMB footprint itself measures 0.220" × 0.130", so recommended pad extensions beyond the outline ensure adequate copper mass for heat dissipation during transient events.
Can P6SMB39CA-M3/5B be used in parallel for higher surge current handling?
No - P6SMB39CA-M3/5B should not be paralleled for increased current handling. Minor VBR tolerances (±5 %) between units cause uneven current sharing, leading to thermal runaway in the device with lower breakdown voltage. Vishay does not characterize or guarantee parallel operation. For higher IPPM, select a single higher-rated device such as 1.5SMC39CA (1500 W) or P6KE39CA (600 W in DO-15, less compact), rather than attempting parallel TVS diodes.
What is the junction capacitance of P6SMB39CA-M3/5B, and how does it affect high-speed signal lines?
P6SMB39CA-M3/5B has no specified junction capacitance in the P6SMB datasheet - unlike smaller-package TVS devices (e.g., SOD-323), SMB-class suppressors prioritize surge energy over RF performance. Typical CJ for this family is >200 pF at zero bias (estimated from Fig. 4 curve extrapolation), making it unsuitable for USB 2.0, HDMI, or >10 Mbps digital buses. Use P6SMB39CA-M3/5B only on low-frequency analog lines, power rails, or RS-232/RS-485 where capacitance-induced signal distortion is not critical - always validate with TDR or eye diagram testing if applied near high-speed nodes.
P6SMB39CA-M3/5B 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:
- -
- 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 (SMBJ)
P6SMB39CA-M3/5B FAQ
1.How can I place an order for P6SMB39CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CA-M3/5B 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-M3/5B reliable?
The price and inventory of P6SMB39CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB39CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CA-M3/5B?
P6SMB39CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CA-M3/5B 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-M3/5B?
For technical support, including P6SMB39CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB39CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB39CA-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB39CA-M3/5B?
All P6SMB39CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CA-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB39CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CA-M3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
