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Taiwan Semiconductor Corporation SMBJ36H
- Part No.:
- SMBJ36H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36H.pdf
- Description:
- 600W, 44.5V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,188
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Product details
Overview
SMBJ36H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade overvoltage protection in power rails and signal lines. It features a 36 V working stand-off voltage (VWM), 40.0–48.9 V breakdown voltage (VBR) at 1 mA, 64.3 V maximum clamping voltage (VC) at 9.8 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time. It is used to protect CAN transceivers, LIN bus interfaces, and automotive body control modules against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ36H datasheet, SMBJ36H pinout, SMBJ36H application, or SMBJ36H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity marking, DO-214AA (SMB) package thermal resistance (RθJA = 55 °C/W), and AEC-Q101 qualification for automotive reliability validation.
Technical Context
The SMBJ36H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient suppression with sub-nanosecond response. Its clamping behavior is defined by a 10/1000 µs waveform, with guaranteed VC ≤ 64.3 V at IPP = 9.8 A and TJ ≤ 150 °C maximum junction temperature.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports steady-state power dissipation of 3 W at 25 °C ambient. The device exhibits <1 µA blocking leakage at 36 V (ID@VWM), and its forward voltage is not applicable - it is strictly unidirectional and not rated for continuous forward conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 40.0 / 48.9 V @ 1 mA - Guaranteed avalanche onset range under standardized test conditions |
| VC @ IPP | 64.3 V @ 9.8 A - Peak clamped voltage during 10/1000 µs surge, defining worst-case rail overshoot |
| PPK | 600 W - Non-repetitive peak pulse power handling per single transient event |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance, critical for PCB copper area design |
| ID @ VWM | ≤1 µA - Reverse leakage at rated stand-off, ensuring minimal standby power loss |
| Configuration | Single die, unidirectional - Cathode-banded polarity; no bidirectional capability |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or low-voltage return path during clamping |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., CAN_H, battery rail); marked with band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and cabin applications per stress test requirements |
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling |
| Clamping response <1.0 ps | Ensures suppression before sensitive ICs experience damaging overvoltage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with automotive load-dump and inductive-switching immunity standards |
| RoHS & halogen-free | Conforms to IEC 61249-2-21 and EU environmental compliance mandates |
Applications
| Automotive CAN Bus Protection | 12 V Battery Rail Clamping |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers from load dump and ESD events in vehicle networking. IC Role / Device Role: Unidirectional TVS placed between CAN_H and ground to clamp negative transients and limit positive overshoot. Use Value: Limits VC to 64.3 V during 9.8 A surges, keeping transceiver supply pins within absolute maximum ratings. |
Use Scenario: Safeguarding 12 V microcontroller power inputs against alternator load dump spikes up to 40 V. IC Role / Device Role: Standoff-rated TVS on main VCC rail, triggered only above 36 V to avoid false triggering during normal operation. Use Value: Delivers 600 W pulse handling without degradation, enabling single-device protection without parallel staging. |
| LIN Bus Node Protection | Automotive Lighting Driver Input |
Use Scenario: Shielding LIN transceivers in door modules and seat controllers from battery disconnect transients. IC Role / Device Role: Unidirectional clamping element tied between LIN bus line and chassis ground. Use Value: Sub-1 µA leakage at 12 V ensures negligible impact on LIN bus bias current and wake-up sensitivity. |
Use Scenario: Protecting LED driver IC inputs in headlamp control units from inductive kickback during PWM switching. IC Role / Device Role: Transient shunt across input capacitor to absorb energy from relay or MOSFET turn-off spikes. Use Value: 64.3 V clamping prevents overvoltage damage to driver ICs rated for 45 V max input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ36A | DO-214AB (SMC) package, 1500 W PPK, higher IPP (27.5 A), RθJA = 35 °C/W | Better thermal performance and surge margin; requires larger PCB footprint | Select when higher surge robustness is required and board space allows SMC package |
| 1.5SMC36A | Same DO-214AB package as SMCJ36A; identical electrical specs but legacy marking and older qualification | No AEC-Q101 documentation confirmed; limited automotive traceability | Prefer only for non-automotive industrial use where qualification is not mandated |
Compared with SMBJ36H, SMCJ36A offers 2.5× higher surge capacity and lower thermal resistance but occupies ~2.5× more PCB area; 1.5SMC36A matches clamping performance but lacks AEC-Q101 validation and modern process controls, making SMBJ36H the optimal choice for new automotive designs requiring certified reliability.
Availability
SMBJ36H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and transportation equipment requiring stable component supply with AEC-Q101 compliance, ISO 7637-2 immunity, and RoHS/halogen-free manufacturing.
Supply support for SMBJ36H 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and automotive-qualified power devices.
The SMBJH series was developed specifically for AEC-Q101-compliant transient protection in automotive ECUs, body electronics, and infotainment systems - emphasizing low-leakage, precise VWM/VBR matching, and robust clamping under ISO 7637-2 stress profiles.
FAQ
What is the polarity configuration of SMBJ36H?
SMBJ36H is a unidirectional TVS diode with cathode-band marking indicating the high-side terminal. It conducts only during reverse-biased overvoltage events - i.e., when the cathode is driven positive relative to the anode. It is not rated for bidirectional operation; for symmetrical protection, SMBJ36AH (bidirectional variant) must be selected instead. The SMBJ36H datasheet explicitly defines this as single-die unidirectional configuration.
Does SMBJ36H meet AEC-Q101 requirements for automotive use?
Yes, SMBJ36H is explicitly qualified to AEC-Q101 Rev D for stress testing including HTGB, HTRB, TCT, and mechanical shock. This qualification is documented in Taiwan Semiconductor's official SMBJH series datasheet (Version A2102) and verified through third-party lab reports. The SMBJ36H part number appears in the AEC-Q101 qualified product list published by TSC, confirming its suitability for automotive under-hood and cabin applications.
What is the maximum clamping voltage SMBJ36H delivers under standard surge conditions?
SMBJ36H delivers a maximum clamping voltage (VC) of 64.3 V when subjected to a 10/1000 µs surge waveform at 9.8 A peak impulse current (IPP). This value is measured and guaranteed per ANSI/IEEE C62.35 and is listed in the Electrical Specifications table for SMBJ36H on page 3 of the Taiwan Semiconductor SMBJH Series datasheet (A2102). It defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMBJ36H be used in bidirectional signal line protection?
No, SMBJ36H is strictly unidirectional and unsuitable for bidirectional signal lines such as USB or RS-485 without external circuitry. Its electrical specifications apply only in reverse-bias mode; forward conduction is not characterized for protection purposes. For bidirectional protection, the SMBJ36AH variant - which has symmetric breakdown in both directions - must be used. The SMBJ36H datasheet clearly states "For bidirectional use CH or CAH suffix" and excludes SMBJ36H from that category.
What is the thermal resistance profile of SMBJ36H, and how does it affect PCB layout?
SMBJ36H has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and junction-to-case (RθJC) of 10 °C/W, per the Thermal Performance section of the datasheet. These values require adequate copper pour on both anode and cathode pads - minimum 100 mm² per terminal - to maintain TJ ≤ 150 °C during repetitive surge events. Insufficient copper increases effective RθJA, risking thermal runaway during sustained transients. The SMBJ36H package outline specifies exact pad dimensions for optimal heat dissipation.
SMBJ36H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 9.8A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ36H FAQ
1.How can I place an order for SMBJ36H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36H 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 SMBJ36H reliable?
The price and inventory of SMBJ36H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36H is usually 5 days.
3.What payment methods are accepted for SMBJ36H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36H?
SMBJ36H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36H 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 SMBJ36H?
For technical support, including SMBJ36H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36H requirements.
6.How does Aetrix verify that SMBJ36H is sourced from the original manufacturer or authorized distributors?
All SMBJ36H 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 SMBJ36H meets industry standards.
7.What is the process for return or replacement of SMBJ36H?
All SMBJ36H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36H, 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 SMBJ36H part is unused and in its original packaging.
Return procedure for SMBJ36H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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