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Vishay General Semiconductor - Diodes Division SMB8J13CAHM3/H
- Part No.:
- SMB8J13CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J13CAHM3/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,278
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Product details
Overview
SMB8J13CAHM3/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 13 V stand-off voltage (VWM), 21.5 V maximum clamping voltage (VC) at 37.2 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - suitable for automotive sensor interface and CAN bus line protection.
For engineers reviewing the SMB8J13CAHM3/H datasheet, SMB8J13CAHM3/H pinout, SMB8J13CAHM3/H application, or SMB8J13CAHM3/H equivalent, this device is evaluated for AEC-Q101-qualified board-level ESD/surge immunity in harsh environments where low leakage (<1.0 µA at VWM), fast response time, and stable clamping under repetitive transients are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device complies with ANSI/IEEE C62.35 for transient suppression and delivers consistent clamping performance over -55 °C to +150 °C operating junction temperature. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pad layout per terminal for rated PPPM derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 12 V automotive systems. |
| VBR min/max | 14.4 V / 15.9 V at 1.0 mA test current - verified breakdown threshold ensuring reliable turn-on during transients above system rail. |
| VC @ IPPM | 21.5 V at 37.2 A - clamping voltage limits downstream IC stress during 800 W surge events; enables compatibility with 24 V tolerant receivers. |
| PPPM | 800 W (10/1000 µs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - supports under-hood automotive placement with validated thermal performance up to maximum junction temperature. |
| AEC-Q101 | Qualified - certified for automotive electronics per stress test requirements including HTOL, TC, HTRB, and UHAST. |
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) | Transient conduction path | Both terminals function identically; no polarity marking required - simplifies PCB layout for differential or AC lines. |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional operation eliminates need for cathode band; terminals interchangeable in circuit design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or dual-rail sensors without external polarity management. |
| AEC-Q101 qualification | Validated reliability for automotive ECUs, ADAS camera modules, and body control units requiring zero field failure risk. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during surge events - critical for protecting 24 V-rated transceivers and microcontrollers. |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow profiles without preconditioning - reduces manufacturing complexity and cost. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature; prevents parameter drift in high-humidity or thermal cycling environments. |
Applications
| Automotive Sensor Interface | CAN FD Bus Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±20 kV ESD and 100 V/100 ns transients. Use Value: Maintains signal fidelity below 21.5 V clamping level while surviving >1000 surges per AEC-Q101 HTRB testing. |
Use Scenario: Safeguarding CAN FD physical layer transceivers (e.g., TJA1057) against ISO 16750-2 supply transients and coupled EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point to shunt common-mode surges before reaching transceiver pins. Use Value: Prevents bus lockup by limiting voltage excursion to ≤21.5 V during 800 W pulses - within transceiver absolute maximum ratings. |
| Industrial PLC I/O Module | Smart Meter Communication Port |
|
Use Scenario: Shielding 24 V DC digital input channels from relay coil flyback, motor drive noise, and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary surge suppression element placed upstream of optocoupler input, sized for 800 W peak dissipation. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) Level 3 without additional series impedance or filtering. |
Use Scenario: Securing HPLC or RF communication ports (e.g., NB-IoT, LoRaWAN) in utility meters against meter box surges and neutral-ground transients. IC Role / Device Role / Timing Role: Bidirectional TVS on differential data lines (e.g., RS-485) to absorb asymmetric surges without disrupting DC bias. Use Value: Delivers <1.0 µA leakage at 13 V - preserves battery runtime in 10-year sealed-meter deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J13CAHE3/H | Same electrical specs; RoHS-compliant but not halogen-free; uses standard tin plating instead of matte tin. | Lacks halogen-free certification - unsuitable for automotive OEMs mandating IEC 61249-2-21 compliance. | Select SMB8J13CAHM3/H when halogen-free material content and JESD201 Class 2 whisker resistance are required. |
| SMAJ13CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (90 °C/W), same VWM/VC. | Requires larger PCB area and derates faster above 25 °C ambient - limits use in compact, thermally constrained modules. | Choose SMB8J13CAHM3/H for space-constrained designs needing full 800 W capability in minimal footprint. |
Compared with SMB8J13CAHE3/H and SMAJ13CA, SMB8J13CAHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W surge rating in the compact SMB outline - making it optimal for next-generation automotive and industrial edge nodes where reliability, regulatory compliance, and board density are jointly prioritized.
Availability
SMB8J13CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, CAN FD interface hardening, and industrial PLC I/O conditioning requiring stable component supply across long production lifecycles.
Supply support for SMB8J13CAHM3/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 targets automotive and industrial transient suppression, engineered to meet AEC-Q101 and IEC/EN 61000-4-x standards while delivering high power density in surface-mount packages.
FAQ
What is the clamping voltage of SMB8J13CAHM3/H at its rated peak pulse current?
The SMB8J13CAHM3/H has a maximum clamping voltage (VC) of 21.5 V at its specified peak pulse current (IPPM) of 37.2 A, measured using the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage limits during standardized surge events. The SMB8J13CAHM3/H maintains this clamping performance due to its low incremental surge resistance and glass-passivated junction structure.
Is SMB8J13CAHM3/H qualified for automotive applications?
Yes, SMB8J13CAHM3/H is AEC-Q101 qualified, having passed all required stress tests including high-temperature operating life (HTOL), temperature cycling (TC), high-temperature reverse bias (HTRB), and unbiased highly accelerated stress test (UHAST). This qualification confirms its suitability for under-hood and cabin-mounted automotive electronics. The SMB8J13CAHM3/H carries the HM3 suffix denoting halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
What is the difference between SMB8J13CAHM3/H and SMB8J13CAHE3/H?
The SMB8J13CAHM3/H and SMB8J13CAHE3/H share identical electrical specifications and AEC-Q101 qualification, but differ in material composition: HM3 denotes halogen-free molding compound and matte tin plating meeting JESD201 Class 2 whisker resistance, whereas HE3 uses standard RoHS-compliant materials without halogen-free certification. The SMB8J13CAHM3/H is required for automotive Tier 1 suppliers adhering to IEC 61249-2-21.
Does SMB8J13CAHM3/H have polarity markings on the package?
No, SMB8J13CAHM3/H does not have polarity markings such as a cathode band because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing symmetrical placement on AC-coupled or differential signal lines without orientation constraints. This simplifies automated assembly and eliminates risk of incorrect orientation during PCB layout or placement.
What is the thermal resistance of SMB8J13CAHM3/H, and how does it affect layout?
The SMB8J13CAHM3/H 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. To sustain its full 800 W peak pulse rating, PCB layout must provide these minimum pad dimensions and ensure adequate copper area for heat dissipation. Reduced pad size increases thermal resistance and requires derating per Figure 2 in the Vishay datasheet 88422.
SMB8J13CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 37.2A
- 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)
SMB8J13CAHM3/H FAQ
1.How can I place an order for SMB8J13CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J13CAHM3/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 SMB8J13CAHM3/H reliable?
The price and inventory of SMB8J13CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J13CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMB8J13CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J13CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J13CAHM3/H?
SMB8J13CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J13CAHM3/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 SMB8J13CAHM3/H?
For technical support, including SMB8J13CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J13CAHM3/H requirements.
6.How does Aetrix verify that SMB8J13CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J13CAHM3/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 SMB8J13CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMB8J13CAHM3/H?
All SMB8J13CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J13CAHM3/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 SMB8J13CAHM3/H part is unused and in its original packaging.
Return procedure for SMB8J13CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J13CAHM3/H Tags
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