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Vishay General Semiconductor - Diodes Division P6SMB39CAHM3_A/H
- Part No.:
- P6SMB39CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,616
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Product details
Overview
P6SMB39CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 39 V standoff voltage (VWM), 53.9 V clamping voltage at 11.1 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed to protect MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the P6SMB39CAHM3_A/H datasheet, P6SMB39CAHM3_A/H pinout, P6SMB39CAHM3_A/H application, or P6SMB39CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under PCB pad-limited conduction.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding its 39 V stand-off threshold, it avalanches symmetrically in both directions to clamp the line at ≤53.9 V while diverting up to 11.1 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
Designed for automated SMT placement, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), features matte tin-plated leads per JESD 22-B102, and supports repetitive surge duty cycles up to 0.01 % - enabling reliable protection in high-reliability automotive and industrial environments without polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 39 V - maximum continuous reverse voltage before clamping initiates; defines safe operating window for protected circuitry. |
| VBR (Breakdown) | 37.1–41.0 V at 1.0 mA - verified avalanche onset range ensuring consistent turn-on across production lots. |
| VC (Clamping) | 53.9 V at IPPM = 11.1 A - peak voltage seen by downstream ICs during worst-case 10/1000 μs surge; limits stress on 3.3 V/5 V logic. |
| PPPM | 600 W - peak transient energy absorption capability with standard 10/1000 μs waveform; enables robust ESD and load-dump immunity. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - maximum junction temperature rating; supports operation in under-hood automotive zones. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Accepts surge current during positive or negative overvoltage excursions; connects to protected line. |
| Cathode | Transient current sink (bidirectional) | Completes low-impedance path to ground during clamping; electrically identical to anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive sensor modules requiring extended temperature operation and long-term reliability. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier-1 automotive supply chains and industrial green procurement. |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events without degradation. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles without baking - reduces manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and inductive kick. IC Role / Device Role / Timing Role: Bidirectional shunt TVS providing sub-1 ns response to fast transients while maintaining signal integrity during normal operation. Use Value: Clamps induced spikes to ≤53.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs per ISO 16750-2. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor placed between terminal block and optocoupler input stage. Use Value: Absorbs 600 W surges without failure, eliminating need for external series impedance or additional filtering components. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul equipment from lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Symmetric clamping element across differential lines to preserve common-mode rejection ratio (CMRR). Use Value: Matches impedance balance of twisted-pair traces and maintains <10 ps skew between clamping paths. |
Use Scenario: Secondary-side transient suppression on USB-C VBUS and CC lines in compact wall adapters subjected to human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical at 0 V) bidirectional clamp minimizing signal distortion. Use Value: Meets IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) without compromising USB 2.0 data eye integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39CA | Same SMB package, 39 V VWM, but rated for 600 W with tighter VC tolerance (53.3 V max vs. 53.9 V); non-AEC-Q101, commercial-grade only. | Lacks automotive qualification and halogen-free certification; suitable for industrial/commercial designs without automotive compliance requirements. | Select SMBJ39CA when cost sensitivity outweighs AEC-Q101 and halogen-free mandates. |
| SMCJ39CA | Higher-power 1500 W variant in larger SMC (DO-214AB) package; same VWM/VC specs but requires 30% more board area and higher IPC. | Used where system-level surge tests exceed 600 W (e.g., IEC 61000-4-5 Line-to-Ground 4 kV test) and PCB layout allows larger footprint. | Choose SMCJ39CA only if 600 W rating is insufficient and layout permits SMC package integration. |
Compared with SMBJ39CA and SMCJ39CA, P6SMB39CAHM3_A/H uniquely delivers AEC-Q101 qualification, halogen-free construction, and SMB footprint in a single solution - making it the preferred choice for space-constrained automotive electronics where regulatory compliance and reliability are non-negotiable.
Availability
P6SMB39CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O circuits, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB39CAHM3_A/H 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 high-reliability and automotive-grade performance.
The P6SMB Series targets cost-sensitive yet reliability-critical transient suppression needs in automotive, industrial, and telecom systems - delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 variants.
FAQ
What does the "CA" suffix indicate in P6SMB39CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration: P6SMB39CAHM3_A/H clamps voltage transients symmetrically in both polarities, making it ideal for protecting AC-coupled or floating signal lines such as RS-485 buses or sensor differential pairs. Unlike unidirectional variants (e.g., P6SMB39A), it has no cathode band marking and exhibits matched breakdown characteristics in forward and reverse directions - confirmed by VBR min/max values (37.1–41.0 V) and identical clamping behavior in either direction per Vishay Document 88370.
Is P6SMB39CAHM3_A/H qualified for automotive use?
Yes, P6SMB39CAHM3_A/H is AEC-Q101 qualified - explicitly stated in Vishay's ordering information table (page 3, footnote 1) and supported by its HM3 suffix, which designates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, enabling deployment in engine control units, ADAS sensors, and body electronics where automotive reliability standards apply.
What is the maximum clamping voltage of P6SMB39CAHM3_A/H and under what test condition?
The maximum clamping voltage (VC) of P6SMB39CAHM3_A/H is 53.9 V, measured at a peak pulse current (IPPM) of 11.1 A using the standard 10/1000 μs double-exponential waveform per Figure 1 and Table on page 2 of Vishay Document 88370. This value represents the worst-case voltage imposed on protected circuitry during a surge event and is guaranteed across the full operating temperature range (−65 °C to +150 °C).
How does the HM3 suffix affect compliance and assembly of P6SMB39CAHM3_A/H?
The HM3 suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards. It also confirms MSL Level 1 rating (per J-STD-020), allowing unlimited floor life and standard Pb-free reflow profiles up to 260 °C peak - eliminating pre-bake requirements and simplifying SMT line integration for high-volume automotive and industrial manufacturing.
Can P6SMB39CAHM3_A/H replace P6SMB39A in a design?
No - P6SMB39CAHM3_A/H is bidirectional while P6SMB39A is unidirectional; they differ fundamentally in polarity handling and marking. P6SMB39A has a cathode band and conducts only in reverse bias, whereas P6SMB39CAHM3_A/H has no polarity marking and clamps equally in both directions. Substitution would require verifying circuit topology: bidirectional protection is mandatory for AC signals or floating references, while unidirectional parts suit DC-biased rails. The datasheet explicitly separates CA and A variants in all electrical tables and application notes.
P6SMB39CAHM3_A/H 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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for P6SMB39CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHM3_A/H 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_A/H reliable?
The price and inventory of P6SMB39CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHM3_A/H?
P6SMB39CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHM3_A/H 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_A/H?
For technical support, including P6SMB39CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB39CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHM3_A/H?
All P6SMB39CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for P6SMB39CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CAHM3_A/H Tags
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