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Taiwan Semiconductor Corporation SMBJ36AH
- Part No.:
- SMBJ36AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36AH.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,674
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Product details
Overview
SMBJ36AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 36 V working stand-off voltage, 40.0–44.2 V breakdown voltage at 1 mA, 58.1 V maximum clamping voltage at 10.8 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
For engineers reviewing the SMBJ36AH datasheet, SMBJ36AH pinout, SMBJ36AH application, or SMBJ36AH equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current at operating voltage, thermal derating above 25°C, and compliance with automotive transients-especially for 12 V battery rail protection in ECUs and body control modules.
Technical Context
The SMBJ36AH operates as a unidirectional avalanche diode, conducting only during reverse overvoltage events while presenting minimal capacitance (<100 pF at 0 V) and leakage (<1 µA at 36 V) under normal bias. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
It is rated for 150°C maximum junction temperature, with 10°C/W junction-to-case and 55°C/W junction-to-ambient thermal resistance. The device complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, supporting lead-free reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit of protected circuit's nominal rail. |
| VBR @ IT=1 mA | 40.0–44.2 V - Breakdown voltage range defining reliable avalanche onset; ensures tight tolerance for predictable clamping. |
| VC @ IPP=10.8 A | 58.1 V - Maximum clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by downstream ICs. |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform; defines single-event surge robustness in automotive load-dump scenarios. |
| IPP | 10.8 A - Peak impulse current capability at rated clamping voltage; used to size PCB trace width and verify system-level surge margin. |
| ID @ VWM | <1 µA - Reverse leakage at 36 V; negligible power loss and no measurable impact on low-power sensor or microcontroller bias networks. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; forms current loop during clamping event. |
| Cathode | Protected rail input | Connected to the line being protected (e.g., 12 V battery feed); conducts avalanche current to ground when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and chassis applications including temperature cycling, humidity, and mechanical shock per stress test requirements. |
| Glass-passivated junction | Ensures stable VBR over lifetime and prevents parameter drift due to moisture ingress or surface contamination. |
| ISO 7637-2 compliance | Guarantees functional immunity against standardized automotive transients (Pulse 1: inductive switch-off; Pulse 2b: battery disconnect; Pulse 3a/b: capacitive coupling). |
| Fast response time <1.0 ps | Clamps before sensitive logic or analog circuits experience damaging overvoltage-critical for protecting CAN transceivers and MCU I/O pins. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rail in BCM from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and local DC/DC converter input. Use Value: Limits transient voltage to ≤58.1 V, preventing damage to 40 V-rated buck controller and ensuring uninterrupted operation during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end clamp on 24 V optocoupler input stage. Use Value: Absorbs up to 600 W of energy from 1 kV/500 A surge (10/1000 µs), maintaining signal integrity and eliminating false triggering. |
| LED Headlamp Driver | Automotive Infotainment Power Rail |
Use Scenario: Safeguarding constant-current LED driver ICs from reverse-polarity connection and jump-start spikes. IC Role / Device Role / Timing Role: Reverse-biased protection across input capacitor of buck-boost LED controller. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), enabling robustness against accidental battery reversal during service. | Use Scenario: Guarding 5 V/3.3 V power domains feeding audio codecs and display interfaces in head units. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary DC/DC regulator, targeting fast ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4). Use Value: Sub-1 µA leakage at 36 V ensures no loading of low-quiescent LDOs; 58.1 V clamping protects 3.6 V absolute max-rated interface ICs via appropriate voltage margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Non-AEC-Q101 version; identical electrical specs but not qualified for automotive temperature and reliability stress testing. | Limited to commercial/industrial use where AEC-Q101 is not mandated. | Select SMBJ36A only if automotive qualification is unnecessary and cost sensitivity outweighs long-term field reliability requirements. |
| SAC36 | Same DO-214AA package, but lower PPK = 400 W and higher VC = 64.3 V at 7.2 A; not AEC-Q101 qualified. | Acceptable for less demanding surges where clamping voltage margin allows higher VC and peak power is below 400 W. | Choose SAC36 only when system-level surge testing confirms 400 W rating suffices and 64.3 V clamping remains within protected IC's absolute maximum rating. |
Compared with SMBJ36A and SAC36, the SMBJ36AH provides guaranteed automotive-grade reliability, tighter VBR tolerance, and superior clamping performance-making it the preferred choice for safety-critical 12 V rail protection where ISO 7637-2 compliance and AEC-Q101 validation are mandatory.
Availability
SMBJ36AH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, LED lighting drivers, and infotainment power rail protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMBJ36AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing low clamping voltage, fast response, and robust thermal performance in compact SMB packages.
FAQ
What is the maximum clamping voltage of SMBJ36AH under a 10/1000 µs surge?
The SMBJ36AH has a maximum clamping voltage (VC) of 58.1 V when subjected to a 10.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the highest voltage that will appear across the protected circuit during a standardized surge event. Designers must ensure this clamping level stays below the absolute maximum voltage rating of downstream components in the SMBJ36AH-protected rail.
Is SMBJ36AH bidirectional or unidirectional?
The SMBJ36AH is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix (e.g., SMBJ36CH would be bidirectional). Its cathode band marks the terminal connected to the protected line, and it conducts only during reverse overvoltage events. For bipolar protection, a separate SMBJ36CH or back-to-back unidirectional configuration is required-not the SMBJ36AH itself.
Does SMBJ36AH meet automotive qualification standards?
Yes, SMBJ36AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its qualification covers temperature cycling, high-temperature operating life, and mechanical shock-ensuring suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is critical.
What is the leakage current specification for SMBJ36AH at its working voltage?
At its rated working stand-off voltage of 36 V, the SMBJ36AH exhibits a maximum blocking leakage current (ID) of 1 µA at 25°C. This ultra-low leakage ensures negligible power loss and avoids interference with precision bias networks or high-impedance sensor inputs-making it suitable for always-on automotive modules and battery-powered industrial nodes.
What package type does SMBJ36AH use, and is it RoHS compliant?
SMBJ36AH uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. It is RoHS compliant and halogen-free per IEC 61249-2-21, with moisture sensitivity level (MSL) 1-enabling standard reflow assembly without baking or special handling.
SMBJ36AH 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:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 10.8A
- 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)
SMBJ36AH FAQ
1.How can I place an order for SMBJ36AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36AH 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 SMBJ36AH reliable?
The price and inventory of SMBJ36AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36AH is usually 5 days.
3.What payment methods are accepted for SMBJ36AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36AH?
SMBJ36AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36AH 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 SMBJ36AH?
For technical support, including SMBJ36AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36AH requirements.
6.How does Aetrix verify that SMBJ36AH is sourced from the original manufacturer or authorized distributors?
All SMBJ36AH 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 SMBJ36AH meets industry standards.
7.What is the process for return or replacement of SMBJ36AH?
All SMBJ36AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36AH, 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 SMBJ36AH part is unused and in its original packaging.
Return procedure for SMBJ36AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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