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Vishay General Semiconductor - Diodes Division SMB8J36CAHE3/5B
- Part No.:
- SMB8J36CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHE3/5B.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J36CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 800 W peak pulse power (10/1000 µs), 36 V stand-off voltage (VWM), and 58.1 V clamping voltage (VC) at 13.8 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, CAN transceivers, and power supply rails against ESD and load dump transients.
For engineers reviewing the SMB8J36CAHE3/5B datasheet, SMB8J36CAHE3/5B pinout, SMB8J36CAHE3/5B application, or SMB8J36CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 36 V working voltage compatibility with 12 V/24 V automotive systems, low leakage (<1.0 µA at VWM), and SMB package suitability for automated SMT assembly on space-constrained PCBs.
Technical Context
This device operates as a voltage-clamped avalanche diode, responding within <1 ns to transients exceeding its 40.0–44.2 V breakdown range (VBR at 1 mA). Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Thermal design relies on RθJA = 72 °C/W and RθJL = 20 °C/W, requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 800 W pulse handling. It meets J-STD-020 MSL Level 1 and supports peak reflow up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; matches 24 V automotive system nominal rails with margin. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - Ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC @ IPPM | 58.1 V at 13.8 A - Clamping voltage limits downstream IC stress during 800 W transient events. |
| PPPM | 800 W (10/1000 µs) - Sustains high-energy surges typical of ISO 7637-2 Pulse 1/2a/5a in automotive environments. |
| ID @ VWM | <1.0 µA - Negligible leakage preserves battery life and signal integrity in always-on vehicle modules. |
| TJ max | +150 °C - Enables operation in under-hood automotive locations with extended thermal margins. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity across the device. |
| Case (body) | Thermal and mechanical interface | Plastic case provides UL 94 V-0 flammability rating; requires 0.2" × 0.2" copper pads per terminal for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics. |
| 800 W peak pulse power (bidirectional) | Withstands ISO 7637-2 Pulse 5a (load dump) surges without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on protected ICs-e.g., 58.1 V clamp limits 36 V rail transients to safe levels for 40 V-rated receivers. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under high humidity and temperature cycling conditions. |
Applications
| Automotive CAN Bus Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers from coupled transients on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across CANH/CANL differential pair. Use Value: Limits transient overshoot to ≤58.1 V, preserving transceiver integrity during ISO 16750-2 jump-start or alternator load dump events. |
Use Scenario: Safeguarding 5 V/3.3 V LDO regulators and microcontrollers from 12 V/24 V supply line surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main ECU input rail upstream of DC-DC converter. Use Value: Absorbs 800 W pulses without failure, preventing brownout or latch-up in safety-critical engine management logic. |
| ADAS Camera Module Signal Lines | Body Control Module (BCM) LIN Bus |
Use Scenario: Shielding MIPI CSI-2 data lanes from ESD and cable discharge events in rear-view camera assemblies. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector interface before serializer IC. Use Value: Sub-1 ns response prevents bit errors in high-speed video streams; <1.0 µA leakage avoids DC bias shift in analog front-end. |
Use Scenario: Securing LIN transceiver I/O pins against battery reversal and inductive switching noise in door module networks. IC Role / Device Role / Timing Role: Bidirectional clamp on LIN bus line referenced to ground. Use Value: Maintains LIN physical layer compliance (ISO 17987-4) by limiting voltage excursions to ≤58.1 V during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA-E3/5B | Unqualified commercial grade; same VWM/VC/PPPM but lacks AEC-Q101 validation and halogen-free construction. | Restricted to non-automotive industrial or consumer use where automotive reliability certification is not required. | Select only if cost sensitivity outweighs automotive qualification needs and long-term field reliability is not mission-critical. |
| SMCJ36CAHE3_A/H | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; identical VWM/VC but 2× footprint area and higher thermal mass. | Suitable for higher-energy surge environments (e.g., alternator output lines) where PCB space allows larger package. | Choose when system-level surge testing exceeds 800 W requirements or when thermal derating at elevated ambient temperatures is needed. |
Compared with SMB8J36CAHE3/5B, SMBJ36CA-E3/5B offers identical electrical performance but no automotive qualification, while SMCJ36CAHE3_A/H delivers greater surge capacity at the cost of board area and assembly compatibility-making SMB8J36CAHE3/5B the optimal balance of AEC-Q101 compliance, SMB footprint, and 800 W protection for space-constrained automotive modules.
Availability
SMB8J36CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN/LIN bus nodes, and ECU power inputs requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.
Supply support for SMB8J36CAHE3/5B 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 high-reliability and automotive-grade solutions.
The SMB8JxxCA family targets automotive transient suppression, delivering AEC-Q101-qualified bidirectional TVS diodes optimized for CAN, LIN, FlexRay, and sensor signal line protection in harsh vehicle environments.
FAQ
What is the maximum clamping voltage of SMB8J36CAHE3/5B at its rated peak pulse current?
The SMB8J36CAHE3/5B has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM) of 13.8 A under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream ICs such as CAN transceivers or microcontroller I/Os. The SMB8J36CAHE3/5B maintains this clamping performance across its specified operating temperature range of -55 °C to +150 °C.
Is SMB8J36CAHE3/5B suitable for protecting 24 V automotive systems?
Yes, SMB8J36CAHE3/5B is specifically suited for 24 V automotive systems: its 36 V stand-off voltage (VWM) provides adequate margin above nominal 24 V rails, while its 40.0–44.2 V breakdown range ensures robust turn-on during load dump or jump-start transients. The SMB8J36CAHE3/5B's AEC-Q101 qualification further validates its reliability in under-hood and chassis-mounted applications where thermal and vibration stresses are severe.
Does SMB8J36CAHE3/5B have polarity markings, and how is it installed on PCB?
No, SMB8J36CAHE3/5B is a bidirectional TVS diode and carries no polarity marking-its symmetrical construction means either terminal may connect to either side of the protected line. Installation requires mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power dissipation. The SMB8J36CAHE3/5B uses matte tin-plated leads compatible with standard lead-free reflow profiles up to 260 °C.
How does SMB8J36CAHE3/5B differ from unidirectional variants like SMB10J36AHE3/5B?
The SMB8J36CAHE3/5B is bidirectional with 800 W PPPM and symmetric clamping, whereas SMB10J36AHE3/5B is unidirectional with 1000 W PPPM and cathode-anode polarity dependence. The "C" suffix in SMB8J36CAHE3/5B explicitly denotes bidirectionality, making it appropriate for AC-coupled or differential buses (e.g., CAN, LIN), while SMB10J36AHE3/5B suits DC power rails where polarity is fixed. Both share identical VWM (36 V) and VC (58.1 V), but only SMB8J36CAHE3/5B supports reverse-polarity surge suppression.
What is the leakage current specification for SMB8J36CAHE3/5B at its stand-off voltage?
The SMB8J36CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 36 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves battery drain budgets in always-on automotive modules such as telematics control units or smart junction boxes. The SMB8J36CAHE3/5B maintains leakage below 5.0 µA across its full operating temperature range (-55 °C to +150 °C), ensuring consistent performance in extreme environmental conditions.
SMB8J36CAHE3/5B 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J36CAHE3/5B FAQ
1.How can I place an order for SMB8J36CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHE3/5B 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 SMB8J36CAHE3/5B reliable?
The price and inventory of SMB8J36CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J36CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHE3/5B?
SMB8J36CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHE3/5B 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 SMB8J36CAHE3/5B?
For technical support, including SMB8J36CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J36CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHE3/5B 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 SMB8J36CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHE3/5B?
All SMB8J36CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHE3/5B, 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 SMB8J36CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J36CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHE3/5B Tags
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