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Vishay General Semiconductor - Diodes Division P6SMB12AHM3_B/I
- Part No.:
- P6SMB12AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12AHM3_B/I.pdf
- Description:
- 600W,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,130
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Product details
Overview
P6SMB12AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 12 V standoff voltage (VWM = 10.2 V), 16.7 V clamping voltage at 35.9 A peak pulse current (10/1000 μs), and 600 W peak pulse power - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the P6SMB12AHM3_B/I datasheet, P6SMB12AHM3_B/I pinout, P6SMB12AHM3_B/I application, or P6SMB12AHM3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable breakdown behavior and fast response (<1 ns). Its thermal design supports operation up to +150 °C junction temperature with RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads.
The device meets J-STD-020 MSL Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance requirements. It is specifically qualified per AEC-Q101 for automotive applications, with HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 10.2 V - Maximum continuous reverse operating voltage before clamping begins; ensures no conduction during normal 12 V system operation. |
| VBR (Breakdown) | 11.4–12.6 V at 1 mA - Verified breakdown threshold range; guarantees reliable turn-on within ±5% of nominal rating. |
| VC (Clamping) | 16.7 V at IPPM = 35.9 A (10/1000 μs) - Limits transient voltage seen by protected circuitry to safe levels during surge events. |
| PPPM | 600 W - Peak pulse power handling capability under standardized 10/1000 μs waveform; enables robust protection against ISO 7637-2 Pulse 1/2a/5a. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy fault conditions without bond-wire failure. |
| TJ max | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive environments and high-ambient industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to ground or low-side return path; defines reference for clamping action during positive transients. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 12 V rail or signal trace); conducts surge current to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, body electronics, and ADAS modules. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates without compromising surge robustness or thermal stability. |
| 600 W peak pulse power (10/1000 μs) | Provides margin against high-energy transients such as load dump (ISO 16750-2) and inductive kickback in solenoid/relay drivers. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream components - critical for protecting 16 V-rated logic inputs and gate drivers. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without preconditioning or special handling - reduces manufacturing cost and risk. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in body control modules (BCM) and junction boxes from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input stage. Use Value: Clamps transients to ≤16.7 V, preventing damage to 24 V-tolerant regulators and ensuring uninterrupted MCU operation during ISO 16750-2 Pulse 5a events. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Standoff protector on 4–20 mA current loop or 0–10 V signal line exposed to field wiring EMI and ground bounce. Use Value: Limits induced surges to <17 V while maintaining <1 μA leakage at 10.2 V - preserving signal integrity and ADC accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Fast-response clamp on regulated 12 V output rail upstream of USB-PD controllers and PMICs. Use Value: Responds in <1 ns to fast-rising transients from nearby relay switching, holding downstream voltage within 16.7 V for >1000 μs. |
Use Scenario: DC feed protection in PoE-powered base stations and remote radio units operating from -48 V telecom supplies. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on positive rail with series fuse for fault isolation. Use Value: Withstands repeated 600 W surges at 0.01% duty cycle - matches telecom surge test profiles (GR-1089-CORE) without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12AHE3/A/H | Same VWM (10.2 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for automotive load dump where 600 W margin is required. | Select only for space-constrained consumer designs with verified <400 W surge exposure. |
| 1.5SMC12A | Same VWM/VC, SMC package (DO-214AB), higher IFSM (200 A), but non-AEC-Q101, commercial-grade only | Lacks automotive qualification and halogen-free certification; requires additional reliability validation for vehicle use. | Acceptable for industrial controls where AEC-Q101 is not mandated and larger SMC footprint is acceptable. |
Compared with SMAJ12AHE3/A/H and 1.5SMC12A, P6SMB12AHM3_B/I uniquely combines AEC-Q101 qualification, 600 W surge rating, halogen-free compliance, and SMB footprint - making it the preferred choice for production automotive ECUs and high-reliability industrial systems requiring zero qualification overhead.
Availability
P6SMB12AHM3_B/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, consumer power adapter input stages, and telecom DC power feeds requiring stable component supply across extended product lifecycles.
Supply support for P6SMB12AHM3_B/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, low clamping ratios, and robust surge endurance in compact SMB packages.
FAQ
What is the clamping voltage of P6SMB12AHM3_B/I at its rated peak pulse current?
The P6SMB12AHM3_B/I has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 35.9 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88370 and reflects worst-case clamping performance at TA = 25 °C with specified PCB pad layout. The P6SMB12AHM3_B/I maintains this clamping level across its full operating temperature range due to its low temperature coefficient of VBR (0.078 %/°C).
Is P6SMB12AHM3_B/I suitable for automotive applications?
Yes, P6SMB12AHM3_B/I is explicitly AEC-Q101 qualified, as confirmed by the "HM3_B" suffix and Vishay's ordering information table (page 3, document 88370). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and mechanical shock - meeting requirements for under-hood and chassis-mounted electronic control units. The P6SMB12AHM3_B/I also complies with J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance standards, supporting automotive manufacturing flow.
What does the "HM3_B/I" suffix mean in P6SMB12AHM3_B/I?
In P6SMB12AHM3_B/I, "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification; "B" indicates AEC-Q101 qualification grade for the 6.8 V to 220 V voltage range; and "I" specifies 3200-unit quantity per 13-inch tape-and-reel delivery format. This full suffix confirms the P6SMB12AHM3_B/I meets automotive reliability, environmental, and packaging requirements without requiring additional screening or qualification by the end user.
How does P6SMB12AHM3_B/I compare to bidirectional variants like P6SMB12CA?
P6SMB12AHM3_B/I is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where surge direction is known (e.g., 12 V battery line to ground). In contrast, P6SMB12CA is bidirectional, offering symmetric clamping for AC-coupled or floating signal lines. The P6SMB12AHM3_B/I provides tighter VBR tolerance (11.4–12.6 V vs. 11.1–13.3 V for P6SMB12CA) and is AEC-Q101 qualified, whereas P6SMB12CA is commercial-grade unless specified with HE3/HM3 suffixes.
What is the thermal resistance of P6SMB12AHM3_B/I, and how does it affect layout?
The P6SMB12AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay document 88370. To maintain safe junction temperatures under sustained 5.0 W power dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks. Reducing pad size increases RθJA, potentially limiting surge repetition rate - the P6SMB12AHM3_B/I's derating curve (Figure 2) must be consulted for elevated ambient conditions.
P6SMB12AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 35.9A
- 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)
P6SMB12AHM3_B/I FAQ
1.How can I place an order for P6SMB12AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12AHM3_B/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 P6SMB12AHM3_B/I reliable?
The price and inventory of P6SMB12AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB12AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12AHM3_B/I?
P6SMB12AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12AHM3_B/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 P6SMB12AHM3_B/I?
For technical support, including P6SMB12AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB12AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB12AHM3_B/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 P6SMB12AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB12AHM3_B/I?
All P6SMB12AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12AHM3_B/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 P6SMB12AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB12AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB12AHM3_B/I Tags
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