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Vishay General Semiconductor - Diodes Division SMB8J7.5CAHM3_A/H
- Part No.:
- SMB8J7.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,799
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Product details
Overview
SMB8J7.5CAHM3_A/H 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 sensor interface and industrial I/O protection.
For engineers reviewing the SMB8J7.5CAHM3_A/H datasheet, SMB8J7.5CAHM3_A/H pinout, SMB8J7.5CAHM3_A/H application, or SMB8J7.5CAHM3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low leakage (<1 µA at 7.5 V), thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior across -55 °C to +150 °C operating range, and its bidirectional configuration eliminates polarity dependency in AC-coupled or differential signal paths.
The SMB8J7.5CAHM3_A/H delivers symmetrical clamping in both directions with identical VBR (8.33–9.21 V at 1.0 mA), VC (12.9 V), and IPPM (200 A), meeting ANSI/IEEE C62.35 standards for surge immunity. Its MSL Level 1 rating and 260 °C lead-free reflow compatibility support high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before clamping initiates; sets safe operating margin for 5 V or 12 V rail protection |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variance |
| VC @ IPPM | 12.9 V at 200 A (10/1000 µs) - limits downstream voltage stress during 800 W surge events |
| ID @ VWM | <1 µA - negligible standby leakage preserves battery life and signal integrity in always-on sensor nodes |
| PPPM | 800 W - enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 2nd-level surges |
| TJ max | +150 °C - supports under-hood automotive deployment without derating in compact enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, and HTRB testing per stress test plan |
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); recommended pad layout: 5.59 mm × 2.18 mm minimum per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference node for bidirectional clamping | Internally symmetric - no functional distinction between terminals; device conducts equally in either direction |
| Cathode (unmarked end) | High-side reference node for bidirectional clamping | Same physical terminal as Anode; bidirectional operation means both ends serve dual polarity roles |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per full stress test suite - enables use in ADAS camera modules and body control units without additional qualification |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) and supports green manufacturing |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and allows standard lead-free SMT processes without baking or special handling |
| Glass-passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh under-hood environments |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., load dump), improving protection margin for 3.3 V/5 V logic interfaces |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector entry point, absorbing energy before it reaches protected ICs. Use Value: Prevents latch-up or permanent damage to 5 V tolerant transceivers during ISO 16750-2 load dump tests (up to 120 V, 400 ms) due to 12.9 V clamping at 200 A. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal fidelity below 12.9 V during 1 kV/0.5 kΩ IEC 61000-4-5 surge events, avoiding ADC saturation and system reset. |
| USB Type-C Port Protection | Smart Meter Communication Lines |
Use Scenario: Shielding USB 2.0 D+/D− lines and VBUS against ESD (±15 kV air, ±8 kV contact) and cable discharge events in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to USB connector, providing sub-nanosecond response to fast transients. Use Value: Clamps ESD pulses to ≤12.9 V within <1 ps, preserving signal integrity up to 480 Mbps while meeting IEC 61000-4-2 Level 4. |
Use Scenario: Securing RS-485/RS-422 communication ports in utility smart meters subjected to lightning-induced surges on long outdoor runs. IC Role / Device Role / Timing Role: First-stage surge diverter on differential pair, paired with GDT or MOV for multi-stage coordination. Use Value: Handles repeated 800 W surges (10/1000 µs) without parameter shift, ensuring >10-year field reliability in unattended meter deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.5CAHE3_A/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable for commercial-automotive hybrids where halogen content is not restricted | Select when cost optimization is prioritized and OEM material declarations do not require halogen-free status |
| SMAJ7.5CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Limited to lower-energy surges and less thermally demanding environments (e.g., consumer IoT) | Choose only for space-constrained designs where 800 W surge capacity and automotive thermal performance are not required |
Compared with SMB8J7.5CAHE3_A/H, the HM3 version adds halogen-free compliance without trade-offs in clamping or lifetime; versus SMAJ7.5CA, SMB8J7.5CAHM3_A/H provides 2× surge power handling and 36 % lower thermal resistance - critical for sustained surge duty cycles in automotive and industrial settings.
Availability
SMB8J7.5CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and smart meter communication line safeguarding requiring stable component supply across extended production lifecycles.
Supply support for SMB8J7.5CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J7.5CAHM3_A/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for automotive-grade transient suppression where AEC-Q101 validation, thermal robustness, and bidirectional symmetry are mandatory.
FAQ
What is the clamping voltage of SMB8J7.5CAHM3_A/H at its rated peak pulse current?
The SMB8J7.5CAHM3_A/H has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 200 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88422. The SMB8J7.5CAHM3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J7.5CAHM3_A/H suitable for automotive applications?
Yes, SMB8J7.5CAHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix and HE3/HM3 ordering code structure. It meets stress test requirements for high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making SMB8J7.5CAHM3_A/H appropriate for engine control units, ADAS sensors, and body electronics.
How does the SMB8J7.5CAHM3_A/H differ from unidirectional variants like SMB10J7.5A?
The SMB8J7.5CAHM3_A/H is bidirectional with symmetrical clamping in both polarities, whereas SMB10J7.5A is unidirectional and conducts only in reverse bias. SMB8J7.5CAHM3_A/H offers 800 W PPPM and 200 A IPPM, while SMB10J7.5A delivers 1000 W and 77.5 A - reflecting different surge energy priorities. SMB8J7.5CAHM3_A/H is optimized for AC-coupled or differential lines; SMB10J7.5A suits DC power rail protection.
What is the thermal resistance from junction to lead (RθJL) for SMB8J7.5CAHM3_A/H?
The SMB8J7.5CAHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in the Thermal Characteristics section of the Vishay datasheet. This low value enables efficient heat transfer to the PCB copper pads, supporting reliable operation during repetitive surge events - a key advantage of the SMB (DO-214AA) package used in SMB8J7.5CAHM3_A/H.
Does SMB8J7.5CAHM3_A/H require orientation during PCB placement?
No, SMB8J7.5CAHM3_A/H is a bidirectional TVS diode with no polarity marking or functional anode/cathode distinction - both terminals are electrically identical. Unlike unidirectional devices, SMB8J7.5CAHM3_A/H can be placed in either orientation on the PCB without affecting clamping performance or circuit functionality.
SMB8J7.5CAHM3_A/H 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/H FAQ
1.How can I place an order for SMB8J7.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CAHM3_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 SMB8J7.5CAHM3_A/H reliable?
The price and inventory of SMB8J7.5CAHM3_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 SMB8J7.5CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CAHM3_A/H?
SMB8J7.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CAHM3_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 SMB8J7.5CAHM3_A/H?
For technical support, including SMB8J7.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J7.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CAHM3_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 SMB8J7.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CAHM3_A/H?
All SMB8J7.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CAHM3_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 SMB8J7.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J7.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CAHM3_A/H Tags
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