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Vishay General Semiconductor - Diodes Division P6SMB39CAHM3/I
- Part No.:
- P6SMB39CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHM3/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,212
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Product details
Overview
P6SMB39CAHM3/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 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 rating with 10/1000 μs waveform - deployed in automotive-grade protection circuits for sensor interfaces and power rails.
For engineers reviewing the P6SMB39CAHM3/I datasheet, P6SMB39CAHM3/I pinout, P6SMB39CAHM3/I application, or P6SMB39CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and thermal performance under repetitive surge conditions in harsh environments.
Technical Context
This device operates as a symmetric, bidirectional avalanche diode that conducts in both polarities above its breakdown threshold, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage and long-term reliability under thermal cycling.
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers sub-nanosecond response time and low dynamic impedance to limit overvoltage during fast-rising surges. The 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.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset. |
| VBR (Breakdown Voltage) | 37.1–41.0 V at 1 mA - Voltage at which avalanche conduction begins; tight tolerance enables predictable protection threshold. |
| VC (Clamping Voltage) | 53.9 V at 11.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capacity with 0.01% duty cycle; validates suitability for infrequent but high-energy spikes. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function identically as anode/cathode depending on applied voltage polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous voltage polarity; no fixed polarity designation. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair or line-to-ground. |
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 concerns. |
| AEC-Q101 qualification (HM3 suffix) | Validates reliability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for global automotive and industrial OEM supply chains. |
| 600 W peak pulse power (10/1000 μs) | Provides margin against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 combination wave surges in 12 V/24 V systems. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing logistics. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed line-to-line and line-to-chassis ground to clamp transients before they reach sensitive PHY or ADC inputs. Use Value: Prevents latch-up or permanent damage to transceivers rated for ≤54 V absolute maximum, leveraging P6SMB39CAHM3/I's 53.9 V clamping at 11.1 A. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B lines and common-mode TVS from A/B to ground, using bidirectional symmetry for polarity-agnostic protection. Use Value: Maintains data integrity by limiting transient overvoltage to <54 V during 1 kV/0.5 kA IEC 61000-4-5 surges, preserving receiver common-mode range. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
|
Use Scenario: Input-stage surge suppression in wall adapters and USB PD chargers subjected to AC line transients and hot-plug events. IC Role / Device Role / Timing Role: Line-to-neutral and line-to-ground TVS on secondary-side DC output (e.g., 5–24 V rails) to absorb capacitive discharge and inductive kickback. Use Value: Enables compliance with UL 62368-1 Annex D surge testing using a single 33.3 V standoff device with 600 W rating and low clamping ratio (VC/VBR ≈ 1.45). |
Use Scenario: Overvoltage protection on -48 V DC telecom power feeds entering remote radio units or baseband processors. IC Role / Device Role / Timing Role: Bidirectional clamping between power and return lines to handle reverse-polarity misconnection and lightning-induced common-mode surges. Use Value: Survives repeated 10/1000 μs surges up to 600 W while maintaining <54 V clamping - critical for protecting -48 V tolerant ICs with ±60 V abs max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | 36 V VWM, 40–44.2 V VBR, 58.1 V VC at 10.3 A; same SMB package but lower PPPM (400 W) and non-AEC-Q101. | Limited to commercial-grade industrial or consumer use; insufficient for automotive under-hood thermal or reliability requirements. | Select when cost sensitivity outweighs AEC-Q101 need and surge energy is ≤400 W. |
| SMCJ36CA | 36 V VWM, 40–44.2 V VBR, 58.1 V VC at 32.4 A; larger SMC (DO-214AB) package, 1500 W PPPM, AEC-Q101 available (HE3/HM3). | Supports higher surge currents and longer duration transients; requires larger PCB area and different thermal design. | Choose for systems requiring >600 W surge immunity or where board space allows SMC footprint. |
Compared with SMAJ36CA, P6SMB39CAHM3/I offers higher surge rating (600 W vs. 400 W) and automotive qualification; compared with SMCJ36CA, it trades peak power for smaller SMB footprint and lower system-level thermal mass - ideal for space-constrained AEC-Q101 designs.
Availability
P6SMB39CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, consumer power adapters, and telecom DC feed circuits requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB39CAHM3/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 systems, with design focus on AEC-Q101 compliance, low clamping voltage, and robust surge handling in compact SMB packages.
FAQ
What does the "HM3" suffix indicate in P6SMB39CAHM3/I?
The HM3 suffix in P6SMB39CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - confirming suitability for automotive applications and environmentally regulated industrial designs. It also specifies tape-and-reel packaging in 13-inch reels (I = 3200 units per reel), verified per Vishay's ordering documentation.
Is P6SMB39CAHM3/I unidirectional or bidirectional?
P6SMB39CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix and electrical specifications showing symmetric VBR and VC values in both polarities. Unlike unidirectional variants (e.g., P6SMB39AHM3/I), it provides clamping for positive and negative transients without polarity-dependent installation.
What is the maximum clamping voltage of P6SMB39CAHM3/I and at what current?
The maximum clamping voltage of P6SMB39CAHM3/I is 53.9 V, measured at 11.1 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is specified in the Vishay P6SMB datasheet (Document Number 88370, page 2) and defines the worst-case overvoltage imposed on protected circuitry during surge events.
Does P6SMB39CAHM3/I require a heatsink for 5.0 W continuous power dissipation?
No - P6SMB39CAHM3/I is rated for 5.0 W power dissipation on an infinite heatsink at TA = 50 °C, but its typical RθJA is 100 °C/W. In practice, it relies on PCB copper pads (0.2" × 0.2" per terminal) for thermal conduction; no external heatsink is needed for transient suppression, as energy is absorbed in short pulses rather than steady-state operation.
How does P6SMB39CAHM3/I compare to P6SMB39A in terms of automotive qualification?
P6SMB39CAHM3/I is AEC-Q101 qualified (via HM3 suffix), whereas P6SMB39A is a commercial-grade unidirectional variant without automotive validation. The "CA" and "HM3" together confirm bidirectional operation and automotive reliability testing - making P6SMB39CAHM3/I suitable for ECU, ADAS, and body control modules where P6SMB39A would not be approved.
P6SMB39CAHM3/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:
- Discontinued at Digi-Key
- 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:
- 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)
P6SMB39CAHM3/I FAQ
1.How can I place an order for P6SMB39CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHM3/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 P6SMB39CAHM3/I reliable?
The price and inventory of P6SMB39CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHM3/I is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHM3/I?
P6SMB39CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHM3/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 P6SMB39CAHM3/I?
For technical support, including P6SMB39CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHM3/I requirements.
6.How does Aetrix verify that P6SMB39CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHM3/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 P6SMB39CAHM3/I meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHM3/I?
All P6SMB39CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHM3/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 P6SMB39CAHM3/I part is unused and in its original packaging.
Return procedure for P6SMB39CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CAHM3/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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