My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J15CAHM3_B/H
- Part No.:
- SMB8J15CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3_B/H.pdf
- Description:
- 800W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,228
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J15CAHM3_B/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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O ports, and telecom line protection.
For engineers reviewing the SMB8J15CAHM3_B/H datasheet, SMB8J15CAHM3_B/H pinout, SMB8J15CAHM3_B/H application, or SMB8J15CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on 0.2" × 0.2" 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 symmetry enables symmetric surge suppression on AC-coupled or differential lines without polarity constraints.
The SMB8J15CAHM3_B/H meets JESD201 Class 2 whisker resistance and MSL Level 1 per J-STD-020 (260 °C peak reflow), with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Its thermal resistance (RθJL = 20 °C/W) supports reliable power dissipation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Verified breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 32.8 A - Clamping voltage limits downstream IC stress during 800 W transient surges (10/1000 µs). |
| PPPM | 800 W - Peak pulse power rating determines survivability against lightning-induced or load-switching transients. |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode marking absent (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No polarity dependence - connects across protected line pair (e.g., RS-485 A/B, CAN H/L, or AC signal paths) without orientation check. |
| Case (body) | Thermal and mechanical interface | Direct thermal path to PCB copper pads; requires 0.2" × 0.2" (5.0 mm × 5.0 mm) minimum pad area per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, eliminating parameter drift in harsh automotive duty cycles. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for 3.3 V/5 V logic interfaces. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including temperature cycling, humidity bias, and high-acceleration mechanical shock testing. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling protocols. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed industrial control cabinets and EV charging infrastructure. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting wheel speed, pressure, or temperature sensors connected to vehicle ECUs against ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role: Bidirectional shunt clamp placed across sensor supply and ground or differential signal lines (e.g., SENT, LIN, or analog outputs). Use Value: Limits clamping voltage to 24.4 V while absorbing 800 W surges - preserving sensor accuracy and preventing ECU reset during load dump events. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor drive noise and long cable EMI. IC Role / Device Role: Paired TVS devices across A/B lines and line-to-ground to suppress common-mode and differential-mode transients up to ±30 kV ESD. Use Value: Maintains signal integrity below 24.4 V clamping level while supporting >32 A surge current - enabling robust communication in noisy 24 V DC industrial environments. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Shielding Ethernet PHYs or xDSL line drivers from lightning-induced surges entering via outdoor cabling. IC Role / Device Role: Primary protection stage before GDT or secondary TVS, placed between transformer center-tap and chassis ground. Use Value: Responds in sub-nanosecond time with 24.4 V clamping - limiting stress on 2.5 V/3.3 V PHY I/O pins during 10/1000 µs threat waveforms. |
Use Scenario: Guarding USB 2.0 data lines (D+/D-) in portable medical monitors or smart home hubs against human-body-model ESD. IC Role / Device Role: Low-capacitance bidirectional clamp (CJ ≈ 100–200 pF at 0 V) placed directly at connector entry point. Use Value: Delivers 24.4 V clamping at 32.8 A without distorting 480 Mbps data signals - verified per IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J15CAHE3_B/H | RoHS-compliant but not AEC-Q101 qualified; same electrical specs and SMB package. | Restricted to commercial/industrial use; not approved for automotive production. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMAJ15CA | Lower PPPM (400 W), higher VC (24.4 V → 25.5 V at 24.2 A), SMA package (smaller footprint, lower thermal mass). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-repetition surge environments. | Choose only for space-constrained consumer designs where 800 W surge immunity is not mandated. |
Compared with SMB8J15CAHM3_B/H, the HE3 variant lacks automotive qualification despite identical clamping and leakage performance, while the SMAJ15CA trades surge capacity and thermal robustness for smaller size - making SMB8J15CAHM3_B/H the sole choice for AEC-Q101-compliant 800 W bidirectional protection in SMB form factor.
Availability
SMB8J15CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom line interface designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J15CAHM3_B/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 high-power density.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant, high-surge-capacity protection in automotive and industrial environments where bidirectional clamping and thermal stability are critical.
FAQ
What is the clamping voltage of SMB8J15CAHM3_B/H at its rated peak pulse current?
The SMB8J15CAHM3_B/H has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees predictable overvoltage limiting for downstream 15 V-rated circuitry. The SMB8J15CAHM3_B/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J15CAHM3_B/H suitable for automotive applications?
Yes, SMB8J15CAHM3_B/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and qualified). It passes stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - making it appropriate for engine control units, ADAS sensors, and infotainment power rails. The SMB8J15CAHM3_B/H is validated for ISO 7637-2 compliance in conjunction with proper PCB layout.
How does the bidirectional configuration of SMB8J15CAHM3_B/H affect its placement on the PCB?
The SMB8J15CAHM3_B/H has no polarity marking and functions identically in either orientation, allowing flexible placement across differential or AC-coupled signal pairs (e.g., CAN H/L, RS-485 A/B, or audio lines) without orientation verification. This eliminates assembly errors and simplifies layout - unlike unidirectional TVS diodes, the SMB8J15CAHM3_B/H requires no cathode alignment and supports symmetric surge suppression on both polarities of a transient event.
What is the thermal resistance specification for SMB8J15CAHM3_B/H, and how does it impact layout?
The SMB8J15CAHM3_B/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, indicating efficient heat transfer from die to PCB copper pads. To achieve rated 800 W pulse power, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Deviating from this pad size reduces thermal derating margin and may cause premature failure under repetitive surge conditions - a key design constraint for the SMB8J15CAHM3_B/H.
Does SMB8J15CAHM3_B/H meet lead-free reflow requirements?
Yes, SMB8J15CAHM3_B/H is rated for MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, fully compatible with standard lead-free soldering processes. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards, and it passes JESD201 Class 2 whisker testing - ensuring reliable interconnect integrity after multiple reflow cycles. No pre-baking is required prior to assembly of the SMB8J15CAHM3_B/H.
SMB8J15CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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)
SMB8J15CAHM3_B/H FAQ
1.How can I place an order for SMB8J15CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3_B/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 SMB8J15CAHM3_B/H reliable?
The price and inventory of SMB8J15CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3_B/H?
SMB8J15CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3_B/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 SMB8J15CAHM3_B/H?
For technical support, including SMB8J15CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J15CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3_B/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 SMB8J15CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3_B/H?
All SMB8J15CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3_B/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 SMB8J15CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHM3_B/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
