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Vishay General Semiconductor - Diodes Division SMB8J7.5CAHM3_A/I
- Part No.:
- SMB8J7.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
SMB8J7.5CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 200 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power rails.
For engineers reviewing the SMB8J7.5CAHM3_A/I datasheet, SMB8J7.5CAHM3_A/I pinout, SMB8J7.5CAHM3_A/I application, or SMB8J7.5CAHM3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM = 1.72), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with bidirectional symmetry enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The SMB8J7.5CAHM3_A/I delivers 800 W peak pulse power handling per IEC 61000-4-5 (10/1000 µs) with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W - enabling robust operation in compact PCB layouts where heat dissipation is constrained by pad size and ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal/power rail margin for 5 V–12 V systems. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - tight breakdown tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 12.9 V at IPPM = 200 A - low clamping voltage limits stress on downstream ICs during 800 W surge events. |
| PPPM | 800 W (10/1000 µs) - rated surge energy capacity suitable for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3/4 protection. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves battery life and signal integrity in always-on sensor nodes and low-power microcontrollers. |
| TJ max | +150 °C - extended junction temperature range supports under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); polarity unmarked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; either terminal serves as input/output for AC or dual-rail protection. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; solderable leads meet J-STD-002/JESD 22-B102. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, high-temperature operating life, and ESD robustness. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic and automotive CAN/LIN transceivers. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns or baking requirements. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with low parameter drift in harsh industrial environments. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental compliance mandates including JEDEC J-STD-201 Class 2 whisker resistance. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensors against load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: With 12.9 V clamping at 200 A, SMB8J7.5CAHM3_A/I prevents latch-up or damage to 5 V tolerant LIN PHYs during 12 V system transients. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted across input terminals to clamp induced transients without affecting loop accuracy or zero-point calibration. Use Value: Sub-1 µA leakage at 7.5 V ensures no measurable error in precision analog measurement paths, preserving 16-bit ADC resolution. |
| USB Type-C Port ESD Protection | DC Power Rail Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB-C CC and VCONN lines in docking stations and peripherals subject to IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) bidirectional suppressor placed after primary polymer PTC and upstream of USB controller ESD diodes. Use Value: 12.9 V clamping limits voltage seen by 5 V tolerant USB-C PHYs during multi-kV ESD events, avoiding false disconnects or protocol errors. |
Use Scenario: Protecting 12 V DC input rails in PoE-powered devices and network switches against lightning-induced surges and inductive switching spikes. IC Role / Device Role / Timing Role: High-power TVS connected between rail and ground to absorb 800 W transients without thermal runaway or degradation. Use Value: 800 W PPPM rating enables compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) when used with appropriate series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.5CAHE3_A/I | Same electrical specs, but RoHS-compliant commercial grade (not AEC-Q101 qualified); E3 suffix indicates standard tin plating without halogen-free requirement. | Lacks automotive qualification - suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMB8J7.5CAHE3_A/I for cost-sensitive non-automotive applications requiring identical clamping performance. |
| SMAJ7.5CA | Lower PPPM (400 W), smaller SMA (DO-214AC) package, higher RθJA (~100 °C/W), same VWM/VC ratings. | Insufficient for 800 W surge events; limited to lower-energy IEC 61000-4-2/4-5 Level 2 protection. | Choose SMAJ7.5CA only when board space is constrained and surge threat level is ≤400 W - not a drop-in replacement. |
Compared with SMB8J7.5CAHE3_A/I, the SMB8J7.5CAHM3_A/I adds AEC-Q101 qualification and halogen-free compliance for automotive use; versus SMAJ7.5CA, it doubles surge power handling and improves thermal performance via larger SMB package and lower RθJA.
Availability
SMB8J7.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, USB-C peripheral protection, and 12 V DC power rail surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J7.5CAHM3_A/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMB8J7.5CAHM3_A/I belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.5CAHM3_A/I at its rated peak pulse current?
The SMB8J7.5CAHM3_A/I has a maximum clamping voltage (VC) of 12.9 V at 200 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized surge conditions and reflects the actual voltage imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J7.5CAHM3_A/I suitable for automotive applications?
Yes, SMB8J7.5CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with whisker-resistant terminations. It is explicitly intended for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal cycling and surge stress is mandatory.
How does the SMB8J7.5CAHM3_A/I differ from unidirectional variants like SMB10J7.5A?
The SMB8J7.5CAHM3_A/I is bidirectional with symmetrical breakdown behavior, making it ideal for AC-coupled or dual-polarity signal lines; SMB10J7.5A is unidirectional, optimized for DC power rail protection with higher 1000 W PPPM. The "C" in SMB8J7.5CAHM3_A/I denotes bidirectionality, and the "8" indicates 800 W rating versus "10" for 1000 W in the unidirectional series.
What is the meaning of the "_A/I" suffix in SMB8J7.5CAHM3_A/I?
The "_A/I" suffix in SMB8J7.5CAHM3_A/I specifies packaging and reel configuration: "A" denotes the revision code per Vishay's documentation, and "I" indicates 13-inch diameter plastic tape and reel with 3200 units per reel - a standard delivery format for high-volume SMT production at Aetrix Electronics.
Does SMB8J7.5CAHM3_A/I require special PCB layout considerations?
Yes - Vishay specifies mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and thermal performance. Reduced pad area increases RθJA and risks thermal failure during repeated surges; layout must also avoid nearby thermally isolating cutouts or traces.
SMB8J7.5CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 62A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.5CAHM3_A/I FAQ
1.How can I place an order for SMB8J7.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CAHM3_A/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 SMB8J7.5CAHM3_A/I reliable?
The price and inventory of SMB8J7.5CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.5CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CAHM3_A/I?
SMB8J7.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CAHM3_A/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 SMB8J7.5CAHM3_A/I?
For technical support, including SMB8J7.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J7.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CAHM3_A/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 SMB8J7.5CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CAHM3_A/I?
All SMB8J7.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CAHM3_A/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 SMB8J7.5CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J7.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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