My Inquiry
My Account
Taiwan Semiconductor Corporation SMBJ90H
- Part No.:
- SMBJ90H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90H.pdf
- Description:
- 600W, 111V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,244
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ90H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 90V working stand-off voltage (VWM), 100–122V breakdown voltage (VBR), and 160V maximum clamping voltage (VC) at 3.9A peak impulse current - designed for automotive ECU power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ90H datasheet, SMBJ90H pinout, SMBJ90H application, or SMBJ90H equivalent, key selection criteria include clamping performance under 10/1000µs surge, low leakage (<1µA @ 90V), AEC-Q101 qualification, and compatibility with automated SMT assembly on 12V/24V vehicle subsystems.
Technical Context
The SMBJ90H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 100–122V breakdown range at 1mA test current. It clamps transient energy to ≤160V within <1.0ps response time while sustaining 600W non-repetitive peak pulse power per 10/1000µs waveform.
Thermally, it features 10°C/W junction-to-case and 55°C/W junction-to-ambient resistance, enabling reliable operation up to +150°C junction temperature. Its glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC blocking threshold in 12V/24V automotive systems. |
| VBR min/max | 100 / 122 V @ 1 mA - Verified avalanche onset range; ensures consistent triggering across production lots and temperature extremes. |
| VC @ IPP | 160 V @ 3.9 A - Clamped voltage during 10/1000µs surge; limits downstream IC stress to survivable levels per IEC 61000-4-5. |
| PPK | 600 W - Peak pulse power handling capability; supports robust immunity to load dump and inductive switching events. |
| ID @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off; prevents battery drain in always-on vehicle modules. |
| VF @ 50A | 3.5 V - Forward voltage drop under high-current surge; confirms low-conduction-loss path during bidirectional fault conditions. |
Pinout & Package
DO-214AA (SMB) surface-mount package: cathode-banded single-ended configuration with two terminals - anode and cathode - mounted on standard 5.3mm × 4.1mm PCB footprint per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to system ground or low-side return path; enables low-VF conduction during positive transients or forward faults. |
| Cathode | Current exit point in forward bias; high-impedance terminal in reverse bias until VBR exceeded | Connected to protected line (e.g., 12V rail); provides precise clamping action when reverse transient exceeds 90V stand-off. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, mechanical shock, and humidity exposure per stress test plan. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of moisture-induced parameter drift in humid engine bay environments. |
| Fast response time <1.0 ps | Clamps transients before sensitive logic or analog circuitry sustains damage - critical for CAN/LIN bus interface protection. |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with full suite of automotive electrical disturbance tests - including load dump (Pulse 5a/b), without external series impedance. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V supply rail of BCM microcontroller and CAN transceivers from alternator load dump and relay coil flyback. IC Role / Device Role: Unidirectional TVS clamp placed between fused 12V input and local LDO regulator input. Use Value: Limits transient voltage to ≤160V, preventing latch-up or gate oxide rupture in 3.3V/5V logic ICs downstream. |
Use Scenario: Shielding 24V digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role: Primary overvoltage clamp on dry-contact input stage prior to optocoupler or Schmitt trigger. Use Value: Maintains <1µA leakage at 24V nominal, ensuring clean signal detection while surviving 1kV/500A surge pulses. |
| LED Headlamp Driver Power Stage | Automotive Infotainment USB Power Rail |
Use Scenario: Safeguarding buck converter MOSFET gates and current-sense amplifiers in adaptive LED headlamps exposed to PWM-induced ringing. IC Role / Device Role: Localized clamping at DC/DC input capacitor node to absorb fast-edge inductive spikes. Use Value: Sub-1ps response captures nanosecond-scale overshoot from MOSFET switching, avoiding false overvoltage shutdown. |
Use Scenario: Protecting USB VBUS line in infotainment head units from hot-plug transients and conducted noise from vehicle battery. IC Role / Device Role: Secondary-level TVS after primary fuse and common-mode choke, before USB controller power pins. Use Value: 90V VWM allows normal 5V operation while clamping 100V+ surges to ≤160V - preserving USB PHY integrity without crowbar action. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90A | Bi-directional configuration; same VWM (90V), but symmetric clamping (VC = 145V @ 4.3A); higher ID (5µA @ VWM). | Required where bidirectional surge sources exist (e.g., AC-coupled sensor lines); not suitable for DC-only rails needing unidirectional low-leakage behavior. | Select SMAJ90A only if bipolar clamping is explicitly needed; SMBJ90H offers lower leakage and automotive-qualified unidirectional performance. |
| ON Semiconductor SMCJ90A | Same DO-214AB (SMC) package; higher PPK (1500W); larger footprint (7.1mm × 6.2mm); VC = 146V @ 6.2A. | Used where higher surge margin is required (e.g., alternator output); incompatible with SMB footprint - requires PCB redesign. | Choose SMCJ90A only when 600W is insufficient; SMBJ90H fits space-constrained layouts and meets AEC-Q101 without footprint penalty. |
Compared with SMAJ90A and SMCJ90A, the SMBJ90H delivers optimal balance of AEC-Q101 compliance, 90V stand-off precision, ultra-low leakage, and DO-214AA footprint - making it the preferred choice for compact, automotive-grade 12V/24V rail protection where board space and qualification rigor are critical.
Availability
SMBJ90H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, LED driver power supplies, and infotainment USB power rails requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ90H 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMBJH series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing low leakage, tight VBR tolerance, and robust thermal performance in compact SMB packages.
FAQ
What is the clamping voltage of SMBJ90H and how is it measured?
The SMBJ90H has a maximum clamping voltage (VC) of 160 V at 3.9 A peak impulse current, tested using the standardized 10/1000 µs double-exponential surge waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, ensuring protected ICs remain within safe operating voltage margins.
Is SMBJ90H unidirectional or bidirectional, and how does that affect circuit placement?
The SMBJ90H is a unidirectional TVS diode, meaning it conducts only when reverse-biased beyond its breakdown voltage. Its cathode must be connected to the protected line (e.g., 12V rail), and anode to ground. This configuration blocks forward current while providing precise clamping on negative-going transients - ideal for DC power rail protection where polarity is fixed.
Does SMBJ90H meet automotive qualification standards?
Yes, SMBJ90H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. It is rated for operation from –55°C to +150°C junction temperature and manufactured with glass-passivated junctions to ensure reliability in under-hood automotive applications.
What is the forward voltage (VF) specification for SMBJ90H and why does it matter?
The SMBJ90H has a forward voltage of 3.5 V at 50 A, as specified in the Absolute Maximum Ratings table. This parameter matters during high-current forward conduction events (e.g., reverse-polarity connection or certain fault modes), confirming low conduction loss and thermal stability under surge conditions.
Can SMBJ90H replace SMBJ90AH in a design?
No - SMBJ90H and SMBJ90AH are not interchangeable. SMBJ90H has a VBR range of 100–122 V, while SMBJ90AH is tighter at 100–111 V. The AH variant offers improved VBR consistency for designs requiring tighter clamping predictability; substituting SMBJ90H may result in earlier or later triggering than intended.
SMBJ90H 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 160V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SMBJ90H FAQ
1.How can I place an order for SMBJ90H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90H 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 SMBJ90H reliable?
The price and inventory of SMBJ90H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90H is usually 5 days.
3.What payment methods are accepted for SMBJ90H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90H?
SMBJ90H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90H 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 SMBJ90H?
For technical support, including SMBJ90H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90H requirements.
6.How does Aetrix verify that SMBJ90H is sourced from the original manufacturer or authorized distributors?
All SMBJ90H 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 SMBJ90H meets industry standards.
7.What is the process for return or replacement of SMBJ90H?
All SMBJ90H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90H, 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 SMBJ90H part is unused and in its original packaging.
Return procedure for SMBJ90H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ90H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
