My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J15CAHM3_A/H
- Part No.:
- SMB8J15CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3_A/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,405
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J15CAHM3_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 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_A/H datasheet, SMB8J15CAHM3_A/H pinout, SMB8J15CAHM3_A/H application, or SMB8J15CAHM3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is halogen-free and RoHS-compliant under HM3 suffix. It is specifically qualified to AEC-Q101 for automotive use, with no marking on the case indicating bidirectional polarity.
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 automotive systems. |
| VBR min/max | 16.7 V / 18.5 V at 1 mA - breakdown voltage range ensures reliable turn-on above system nominal voltage while avoiding false triggering. |
| VC @ IPPM | 24.4 V at 32.8 A - clamping voltage limits downstream IC stress during 800 W transient events (10/1000 µs). |
| PPPM | 800 W - peak pulse power rating determines survivability against ISO 7637-2 Pulse 1/2/5a surges in automotive environments. |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - enables operation in under-hood automotive locations and industrial enclosures without derating. |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance supports sustained surge handling with minimal PCB copper area. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - unmarked case with no cathode band; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry point (bidirectional) | Accepts surge current in either polarity; symmetric conduction eliminates orientation dependency during placement. |
| Cathode (Lead 2) | Transient current exit point (bidirectional) | Completes low-impedance path to ground or return rail; identical electrical role to Anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance mandates without compromising surge performance or thermal stability. |
| Low RθJL (20 °C/W) | Enables effective heat dissipation into PCB leads, reducing need for large thermal pads and supporting compact layout in space-constrained modules. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking, simplifying manufacturing and reducing process risk. |
| Glass-passivated junction | Provides stable VBR over lifetime and immunity to moisture-induced degradation - critical for long-life automotive deployments. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed between signal line and chassis ground, responding within <1 ns to limit voltage excursion below IC absolute maximum ratings. Use Value: Enables compliance with ISO 16750-2 and ISO 7637-2 test pulses while maintaining signal fidelity due to 1.0 µA leakage at 15 V. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring surges, relay coil back-EMF, and ESD events in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge shunt across 24 V DC input terminals, clamping transients to ≤24.4 V to prevent damage to optocoupler or microcontroller input stages. Use Value: Delivers 800 W peak pulse handling without derating up to +125 °C ambient, supporting high-reliability operation in uncooled enclosures. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Bidirectional TVS mounted differential-mode across A/B lines, suppressing common-mode and differential-mode transients simultaneously. Use Value: Symmetric VBR (16.7–18.5 V) ensures balanced clamping on both polarities, preserving signal integrity in full-duplex communication. |
Use Scenario: Adding secondary-level surge protection on USB 2.0 D+/D- lines in smart home hubs exposed to user-handling ESD and docking surges. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical at 0 V) TVS placed directly at connector, limiting ESD to <24.4 V before reaching USB PHY. Use Value: 1.0 µA leakage at 15 V prevents battery drain in portable devices; SMB footprint allows placement within tight USB connector keepouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J15CAHE3_A/H | RoHS-compliant but not halogen-free; same VWM, VC, PPPM, and AEC-Q101 qualification. | Preferred for commercial-automotive hybrids where halogen content is unrestricted but AEC-Q101 compliance is mandatory. | Select when cost sensitivity outweighs halogen-free requirement and supply chain prioritizes E3 over HM3. |
| SMAJ15CAHM3_A/H | Lower PPPM (400 W), higher VC (24.4 V → 25.5 V), SMA package (smaller footprint, higher RθJA = 95 °C/W). | Suitable for lower-energy surges (e.g., IEC 61000-4-2 ESD only); not recommended for ISO 7637-2 Pulse 5a. | Choose only if board space is severely constrained and surge threat level is limited to human-body-model ESD. |
Compared with SMB8J15CAHM3_A/H, the HE3 variant offers identical surge capability without halogen restriction, while the SMAJ15CAHM3_A/H trades 50 % power rating and thermal performance for 30 % smaller footprint - making SMB8J15CAHM3_A/H the optimal balance for automotive-grade 800 W protection in standard SMT layouts.
Availability
SMB8J15CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line interface applications requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for SMB8J15CAHM3_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 SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered for high-power transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation and consistent clamping are non-negotiable.
FAQ
What is the clamping voltage of SMB8J15CAHM3_A/H at its rated peak pulse current?
The SMB8J15CAHM3_A/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 that downstream circuitry remains below critical voltage thresholds during surge events. The SMB8J15CAHM3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J15CAHM3_A/H suitable for automotive applications?
Yes, SMB8J15CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it approved for automotive use in engine control units, ADAS sensors, and body electronics. Its 15 V stand-off voltage aligns with 12 V system rails, and its 800 W PPPM rating satisfies ISO 7637-2 Pulse 5a requirements. The SMB8J15CAHM3_A/H also meets MSL Level 1 for lead-free reflow compatibility.
How does the bidirectional configuration of SMB8J15CAHM3_A/H affect PCB layout?
The SMB8J15CAHM3_A/H has no polarity marking - its bidirectional structure means either lead can connect to signal or ground without functional impact. This eliminates orientation checks during automated placement and simplifies routing on differential or AC-coupled lines like RS-485 or audio interfaces. Layout requires only symmetric 0.2" × 0.2" copper pads per terminal, as specified in the Vishay DO-214AA outline drawing.
What is the leakage current specification for SMB8J15CAHM3_A/H at its stand-off voltage?
At its 15 V stand-off voltage (VWM), the SMB8J15CAHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and minimizes quiescent power loss in battery-powered systems. Leakage remains below 5.0 µA even at +125 °C, ensuring stable performance across automotive and industrial temperature ranges.
Does SMB8J15CAHM3_A/H require derating at elevated ambient temperatures?
Yes, SMB8J15CAHM3_A/H must be derated above TA = 25 °C per Figure 2 in Vishay document 88422. Its peak pulse power drops linearly to ~50 % at +100 °C ambient due to junction temperature limits (TJ max = +150 °C). Derating is managed via the thermal resistance values: RθJA = 72 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead). For sustained surge duty, PCB copper area and airflow should be validated per application - the SMB8J15CAHM3_A/H itself does not include internal thermal shutdown.
SMB8J15CAHM3_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):
- 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_A/H FAQ
1.How can I place an order for SMB8J15CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3_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 SMB8J15CAHM3_A/H reliable?
The price and inventory of SMB8J15CAHM3_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 SMB8J15CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3_A/H?
SMB8J15CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3_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 SMB8J15CAHM3_A/H?
For technical support, including SMB8J15CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J15CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3_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 SMB8J15CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3_A/H?
All SMB8J15CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3_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 SMB8J15CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHM3_A/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
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 …
