My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J15CAHM3/I
- Part No.:
- SMB8J15CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,781
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J15CAHM3/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 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 and industrial I/O protection.
For engineers reviewing the SMB8J15CAHM3/I datasheet, SMB8J15CAHM3/I pinout, SMB8J15CAHM3/I application, or SMB8J15CAHM3/I equivalent, this device serves as an AEC-Q101 qualified, halogen-free, RoHS-compliant TVS for robust ESD and lightning-induced transient suppression in space-constrained surface-mount designs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device delivers 800 W peak pulse power handling per IEC 61000-4-5 (10/1000 µs) with 24.4 V clamping at rated IPPM, and exhibits 72 °C/W junction-to-ambient thermal resistance - requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full power derating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing range in protected circuit. |
| VBR (min/max) | 16.7 V / 18.5 V - breakdown occurs within this band at 1.0 mA test current; ensures predictable turn-on threshold under transients. |
| VC @ IPPM | 24.4 V - clamping voltage measured at 32.8 A peak pulse current; limits downstream voltage stress during surge events. |
| PPPM | 800 W - peak pulse power dissipation capability with 10/1000 µs waveform; determines survivability against IEC 61000-4-5 surges. |
| ID @ VWM | <1.0 µA - reverse leakage at stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance nodes. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 2.20 mm × 3.94 mm body and 5.59 mm length; compatible with automated pick-and-place. |
Pinout & Package
Two-terminal SMB (DO-214AA) package: cathode band denotes polarity for unidirectional variants; SMB8J15CAHM3/I is bidirectional and carries no marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with whisker resistance per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge conduction path | Both terminals function identically; conducts transient current in either direction once VBR is exceeded. |
| Case / Body | Thermal and mechanical interface | Non-electrical; requires 5.0 mm × 5.0 mm copper pad per terminal for specified RθJA = 72 °C/W and PPPM derating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O - meets stress testing for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC JS709E and EU RoHS Directive 2011/65/EU - suitable for green manufacturing and export-regulated markets. |
| Low incremental surge resistance | Enables tighter clamping (VC = 24.4 V at IPPM) versus legacy TVS devices, reducing voltage overshoot on protected ICs like CAN transceivers or ADC front-ends. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile up to 260 °C peak - eliminates baking requirements and streamlines SMT production. |
| Glass passivated junction | Improves long-term reliability and stability of VBR and leakage performance across temperature and lifetime, critical for safety-critical systems. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and microcontroller input, shunting transients before they reach ADC or comparator inputs. Use Value: Limits voltage excursion to ≤24.4 V during 800 W surges, preserving signal integrity and preventing latch-up in 3.3 V/5 V MCUs. |
Use Scenario: Safeguarding RS-485 transceiver data lines in programmable logic controllers (PLCs) subjected to field wiring surges and ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential pair (A/B lines), activated only during overvoltage - zero impact on normal 12 Mbps signaling. Use Value: Clamps common-mode transients up to ±30 kV contact ESD (IEC 61000-4-2) while maintaining <1.0 µA leakage at 15 V operating bias. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
|
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters where 15 V rails feed buck converters and USB port controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary-side isolation, absorbing coupling noise and secondary-side switching spikes. Use Value: Withstands repetitive 10/1000 µs surges up to 800 W without degradation, extending adapter MTBF in multi-tenant residential deployments. |
Use Scenario: Front-end protection of xDSL line drivers and POTS interface ICs in DSLAM line cards exposed to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines, coordinated with gas discharge tubes (GDTs) to handle high-energy threats before semiconductor-level clamping. Use Value: Provides fast response (<1 ns) and precise 15 V standoff to preserve dynamic range of line driver amplifiers while passing GR-1089-CORE surge tests. |
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/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification. | Suitable for non-automotive industrial or consumer use where halogen-free mandate or automotive qualification is not required. | Select SMB8J15CAHE3/I when cost optimization is prioritized and AEC-Q101/halogen-free compliance is unnecessary. |
| SMAJ15CAHM3 | Same VWM (15 V) and VC (24.4 V), but SMA package (smaller footprint, lower PPPM = 400 W); RθJA = 90 °C/W vs. 72 °C/W. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 line surges requiring 800 W. | Choose SMAJ15CAHM3 only for space-constrained PCBs accepting reduced surge margin and higher thermal resistance. |
Compared with SMB8J15CAHE3/I, SMB8J15CAHM3/I adds halogen-free construction and AEC-Q101 validation for automotive deployment; versus SMAJ15CAHM3, it delivers double the surge power rating and superior thermal performance via larger SMB package - making it the sole choice for demanding 800 W IEC 61000-4-5 applications.
Availability
SMB8J15CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line card protection, and consumer power adapter secondary-side surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J15CAHM3/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, power density, and automotive-grade qualification.
The SMB8JxxCA series targets high-reliability transient suppression in automotive and industrial environments, delivering AEC-Q101 validated TVS performance in compact SMB packages for next-generation ECU and sensor node designs.
FAQ
What is the peak pulse power rating of SMB8J15CAHM3/I and under what waveform condition is it specified?
The SMB8J15CAHM3/I has a peak pulse power rating of 800 W, specified under the standard 10/1000 µs double-exponential current waveform per IEC 61000-4-5. This rating assumes mounting on 5.0 mm × 5.0 mm copper pads per terminal and operation at TA = 25 °C; derating applies above 25 °C per Figure 2 in the Vishay datasheet 88422.
Is SMB8J15CAHM3/I suitable for automotive applications, and what qualification does it hold?
Yes, SMB8J15CAHM3/I is explicitly qualified to AEC-Q101 for automotive use, confirmed by the HM3 suffix and documentation in Vishay's datasheet 88422. It undergoes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD, making it appropriate for engine control units, ADAS camera modules, and body electronics where reliability is mission-critical.
How does the clamping voltage of SMB8J15CAHM3/I compare to its stand-off and breakdown voltages?
The SMB8J15CAHM3/I has a stand-off voltage (VWM) of 15 V, a minimum breakdown voltage (VBR) of 16.7 V at 1.0 mA, and a maximum clamping voltage (VC) of 24.4 V at 32.8 A IPPM. This 9.4 V headroom between VWM and VC ensures robust protection margin while avoiding false triggering during normal operation.
What is the thermal resistance and recommended PCB layout for SMB8J15CAHM3/I to achieve full power rating?
SMB8J15CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the datasheet. Deviation from this pad size increases thermal resistance and reduces sustainable pulse power - full 800 W rating requires strict adherence to the specified layout.
Does SMB8J15CAHM3/I have polarity markings, and how is its bidirectional functionality implemented?
No, SMB8J15CAHM3/I carries no polarity marking because it is a bidirectional TVS diode - internally configured as two opposing avalanche diodes in series. This symmetrical structure allows identical clamping behavior for positive and negative transients, eliminating orientation concerns during placement and simplifying design for AC-coupled or differential signal lines.
SMB8J15CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- 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/I FAQ
1.How can I place an order for SMB8J15CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3/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 SMB8J15CAHM3/I reliable?
The price and inventory of SMB8J15CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3/I?
SMB8J15CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3/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 SMB8J15CAHM3/I?
For technical support, including SMB8J15CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3/I requirements.
6.How does Aetrix verify that SMB8J15CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3/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 SMB8J15CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3/I?
All SMB8J15CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3/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 SMB8J15CAHM3/I part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHM3/I 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
