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Vishay General Semiconductor - Diodes Division SMBJ36AHM3_A/I
- Part No.:
- SMBJ36AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36AHM3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ36AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1.0 mA test current, 58.1 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMBJ36AHM3_A/I datasheet, SMBJ36AHM3_A/I pinout, SMBJ36AHM3_A/I application, or SMBJ36AHM3_A/I equivalent, key selection considerations include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, low incremental surge resistance, and suitability for 12 V/24 V automotive subsystems requiring IEC 61000-4-2/4-4/4-5 level protection.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 µA leakage at 36 V), then rapidly avalanches below 44.2 V to clamp transients. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package supports automated placement and meets MSL Level 1 per J-STD-020.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), has a thermal resistance of 100 °C/W (junction-to-ambient), and exhibits a +0.100 %/°C temperature coefficient of VBR, enabling predictable performance across -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 40.0 V / 44.2 V at 1.0 mA - guaranteed avalanche initiation window; ensures consistent clamping onset across production lots. |
| VC @ IPPM | 58.1 V at 10.3 A - maximum clamped voltage during 10/1000 µs surge; determines protected circuit's peak stress level. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports EN 61000-4-5 line surge immunity up to 1 kV/2 Ω. |
| IPPM | 10.3 A - peak surge current corresponding to VC; used to size PCB trace width and verify system-level energy absorption. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band on case end. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to ground or return path; completes clamping loop when transient exceeds VBR. |
| Cathode (banded end) | High-side protection node | Connected to protected line (e.g., 24 V rail); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics; supports PPAP documentation. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements; eliminates brominated flame retardants for safer recycling. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated ISO 7637-2 Pulse 1/2a/3a transients without degradation; suitable for 12 V/24 V vehicle networks. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients; protects downstream MOSFET gates and MCU I/O pins. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-induced damage or popcorn cracking. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 24 V battery-fed ECU power input subjected to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS diode placed between VIN and GND, clamping surges within nanoseconds to protect DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤58.1 V, preventing latch-up or gate oxide rupture in downstream PMICs rated for 40 V absolute maximum. |
Use Scenario: RS-485 communication lines in factory automation exposed to ESD (IEC 61000-4-2) and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS on differential pair (A/B lines), referenced to local ground, absorbing common-mode transients. Use Value: Clamps ±15 kV contact ESD events to <60 V peak, preserving signal integrity and avoiding receiver saturation or false triggering. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Protection |
|
Use Scenario: 12 V output of wall-mounted AC/DC adapter connected to smart home hub, vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage TVS on secondary-side DC output, positioned after filtering but before connector. Use Value: Absorbs 600 W surges without failure, maintaining output regulation and preventing brownout resets in connected IoT devices. |
Use Scenario: -48 V DC feeder line powering remote radio units in 4G/5G base stations, subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail, cathode tied to -48 V, anode to system ground, clamping positive-going transients. Use Value: Withstands 10/1000 µs surges up to 1 kV (2 Ω source), ensuring uninterrupted operation during outdoor site-level surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36AHE3_A/I | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification; no AEC-Q101 qualification. | Approved for industrial/commercial use only; not certified for automotive production programs. | Select when halogen-free content and automotive qualification are not required; lower cost alternative for non-automotive designs. |
| SMAJ36A-HF | Lower peak pulse power (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 load dump. | Choose only for space-constrained consumer applications where 400 W surge capability suffices and thermal margin allows. |
Compared with SMBJ36AHM3_A/I, the SMBJ36AHE3_A/I offers identical clamping and breakdown performance but lacks halogen-free and automotive qualifications, while the SMAJ36A-HF trades 33 % lower surge power and reduced thermal performance for smaller board area - making SMBJ36AHM3_A/I the optimal choice for AEC-Q101-compliant, high-energy automotive and industrial protection.
Availability
SMBJ36AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom DC feeders, and consumer power adapters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ36AHM3_A/I 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom infrastructure where AEC-Q101 compliance, 600 W surge capability, and stable clamping are mandatory.
FAQ
What is the clamping voltage of SMBJ36AHM3_A/I at its rated peak pulse current?
The SMBJ36AHM3_A/I has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM) of 10.3 A, measured using the standard 10/1000 µs double-exponential surge waveform. This value defines the upper voltage limit imposed on the protected circuit during transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMBJ36AHM3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ36AHM3_A/I qualified for automotive applications?
Yes, SMBJ36AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code - indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is tested and certified for use in automotive electronic control units, body electronics, and infotainment systems where reliability under temperature cycling, mechanical shock, and high-energy transients is required. The SMBJ36AHM3_A/I meets all stress tests defined in AEC-Q101 Rev D, including HTGB, AC/HAST, and surge endurance.
What is the difference between SMBJ36AHM3_A/I and SMBJ36AHE3_A/I?
The SMBJ36AHM3_A/I and SMBJ36AHE3_A/I share identical electrical specifications (VWM = 36 V, VBR = 40.0–44.2 V, VC = 58.1 V) and package (SMB), but differ in material compliance and qualification: HM3 denotes halogen-free + RoHS + AEC-Q101, whereas HE3 denotes RoHS-only (non-halogen-free) and commercial-grade (no AEC-Q101). Thus, SMBJ36AHM3_A/I is approved for automotive production, while SMBJ36AHE3_A/I is restricted to industrial/commercial use.
Can SMBJ36AHM3_A/I be used in bidirectional protection circuits?
No, SMBJ36AHM3_A/I is a unidirectional TVS diode, identifiable by its cathode band marking and specified parameters (e.g., VF = 3.5 V max. at 50 A forward current). For bidirectional protection, Vishay offers the SMBJ36CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking. Using SMBJ36AHM3_A/I in a bidirectional configuration would result in unintended forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance of SMBJ36AHM3_A/I, and how does it affect layout design?
The SMBJ36AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts PCB layout: to maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation (PD), designers must provide adequate copper area and consider airflow. For high-reliability automotive applications, adding thermal vias under the pads and connecting to internal ground planes reduces effective RθJA and improves surge endurance consistency.
SMBJ36AHM3_A/I 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ36AHM3_A/I FAQ
1.How can I place an order for SMBJ36AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36AHM3_A/I 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 SMBJ36AHM3_A/I reliable?
The price and inventory of SMBJ36AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ36AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36AHM3_A/I?
SMBJ36AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36AHM3_A/I 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 SMBJ36AHM3_A/I?
For technical support, including SMBJ36AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ36AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ36AHM3_A/I 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 SMBJ36AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ36AHM3_A/I?
All SMBJ36AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36AHM3_A/I, 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 SMBJ36AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ36AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ36AHM3_A/I Tags
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