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NXP Semiconductors BT151-650L,127
- Part No.:
- BT151-650L,127
- Manufacturer:
- NXP Semiconductors
- Category:
- SCRs
- Package:
- TO-220-3
- Datasheet:
-
BT151-650L,127.pdf
- Description:
- NOW WEEN - BT151-650L - SILICON
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Product details
Overview
BT151-650L from NXP Semiconductors is a planar passivated silicon-controlled rectifier (SCR) in a TO-220AB (SOT78) package, rated for 650 V repetitive peak off-state voltage, 12 A RMS on-state current, and 5 mA gate trigger current. It serves as a high-reliability, medium-power AC/DC phase-control switch in mains-connected circuits requiring robust surge handling and thermal cycling stability.
For engineers reviewing the BT151-650L datasheet, BT151-650L pinout, BT151-650L application, or BT151-650L equivalent, this device is selected for discrete thyristor-based switching where precise gate-triggered latching, high dV/dt immunity (≥200 V/µs with 100 Ω gate-cathode resistor), and heatsink-mountable thermal performance (Rth(j-mb) = 1.3 K/W) are critical design requirements.
Technical Context
The BT151-650L operates as a unidirectional, gate-controlled thyristor with latching behavior after triggering: once turned on by ≥2 mA gate current at 12 V anode-cathode bias, it remains conducting until anode current falls below 7–20 mA holding current (IH). Its turn-on is characterized by ≤2 µs gate-controlled delay (tgt) under 40 A load and 100 mA gate drive.
Thermal design relies on mounting base conduction: junction-to-mounting-base resistance is fixed at 1.3 K/W, enabling stable operation up to 125 °C junction temperature when heatsinked, while ambient-air dissipation is limited (Rth(j-a) = 60 K/W). Surge capability supports 132 A non-repetitive peak (8.3 ms half-sine) without failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | 650 V - Maximum repetitive off-state voltage before unintended conduction; defines maximum AC line voltage compatibility (e.g., 230 V RMS + margin). |
| IT(RMS) | 12 A - Maximum continuous RMS current through main terminals with heatsink; determines load power-handling capacity (e.g., ~2.8 kW resistive at 230 V). |
| IGT | 2–5 mA - Gate trigger current range at 25 °C; defines minimum driver strength required (e.g., compatible with microcontroller GPIO via 1 kΩ resistor). |
| dV/dt (with RGK) | 200–1000 V/µs - Critical rate of rise of off-state voltage with 100 Ω gate-cathode resistor; ensures noise immunity in inductive switching environments. |
| Rth(j-mb) | 1.3 K/W - Thermal resistance from junction to mounting base; mandates mechanical interface to heatsink for sustained >7.5 A average current operation. |
| tq | 70 µs - Commutated turn-off time at 125 °C; sets minimum zero-crossing interval or forced-commutation timing budget in AC control. |
| I2t | 72 A²s - Fusing I²t rating for 10 ms sine pulse; used to coordinate upstream fuse selection for short-circuit protection. |
Pinout & Package
Package: TO-220AB (SOT78), plastic single-ended package with heatsink mounting base, 1 mounting hole, and 3 leads. Dimensions per IEC/JEDEC SC-46 outline: 15.2–16.0 mm height, 9.7–10.3 mm width, 3.5–3.8 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Main current return path; electrically tied to heatsink tab in standard mounting; must be isolated if heatsink is grounded. |
| 2 (A) | Anode | High-side main current input; connected to AC line or DC source; polarity-sensitive for forward conduction. |
| 3 (G) | Gate | Control input for triggering; requires current-limited positive pulse relative to cathode; sensitive to ESD and dv/dt coupling. |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability | 132 A non-repetitive peak (8.3 ms half-sine) enables reliable ignition spark generation and motor startup surge tolerance. |
| High thermal cycling performance | Validated for repeated thermal stress cycles between −40 °C and 125 °C junction, supporting industrial equipment longevity. |
| Planar passivated structure | Provides stable leakage current (<0.5 mA at 650 V, 125 °C) and consistent VDRM/VRRM across temperature and life. |
| Gate sensitivity optimization | Low 2–5 mA IGT allows direct drive from logic-level sources without external amplification in cost-sensitive controls. |
| Mounting-base thermal path | 1.3 K/W Rth(j-mb) enables predictable thermal design using standard TO-220 heatsinks, eliminating need for thermal compound uncertainty. |
Applications
| Ignition Circuits | Motor Control |
|---|---|
Use Scenario: Capacitor-discharge ignition (CDI) systems in small gasoline engines (e.g., lawnmowers, generators). IC Role / Device Role / Timing Role: SCR acting as high-voltage, high-dV/dt switch to discharge stored capacitor energy into ignition coil primary winding. Use Value: 200+ V/µs dV/dt immunity prevents false triggering from coil flyback transients; 132 A surge rating handles full capacitor dump. |
Use Scenario: Single-phase AC induction motor speed control via phase-angle firing in fans, pumps, and compressors. IC Role / Device Role / Timing Role: Main power switch in back-to-back or single-quadrant AC controller, triggered synchronously with zero-crossing detection. Use Value: 12 A RMS rating supports motors up to ~1.5 HP; 70 µs tq enables reliable commutation at 50/60 Hz line frequency. |
| Protection Circuits | Static Switching |
Use Scenario: Overvoltage crowbar protection for DC power supplies (e.g., lab bench PSUs, telecom rectifiers). IC Role / Device Role / Timing Role: Latched shunt element that triggers on overvoltage detection and holds until power cycle reset. Use Value: Low 7–20 mA holding current (IH) ensures reliable latching during fault; 650 V VDRM accommodates 400 V DC bus with margin. |
Use Scenario: Solid-state relay replacement in programmable logic controller (PLC) output modules for AC loads. IC Role / Device Role / Timing Role: Bidirectional switching element (used with antiparallel diode or paired SCRs) for contactless AC load switching. Use Value: TO-220AB package allows direct PCB heatsinking; 1.3 K/W Rth(j-mb) supports continuous 7.5 A average current without fan cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics TS110-650 | Same 650 V VDRM, but higher 16 A IT(RMS); gate trigger current 10–25 mA (less sensitive than BT151-650L's 2–5 mA). | Preferred where higher continuous current is needed; less suitable for low-power gate drivers due to higher IGT. | Select TS110-650 only if >12 A RMS load current or higher surge margin is required; verify gate driver can supply ≥10 mA. |
| ON Semiconductor 2N6504 | Identical 650 V VDRM and 12 A IT(RMS), but TO-220AB package with different pinout (Anode/Gate/Cathode = Pins 1/2/3 vs. BT151-650L's K/A/G = 1/2/3); Rth(j-mb) = 1.5 K/W. | Requires PCB layout revision due to reversed anode/gate pin positions; slightly lower thermal efficiency. | Use 2N6504 only in new designs with revised layout; not a drop-in replacement-pin 1 is Anode, not Cathode. |
Compared with TS110-650 and 2N6504, the BT151-650L offers superior gate sensitivity for microcontroller-driven systems and optimal thermal resistance for compact heatsink integration, though its 12 A RMS rating sets a firm upper limit for continuous load sizing.
Availability
BT151-650L is available at Aetrix Electronics and suitable for ignition circuits, motor control, and protection circuits requiring stable component supply, long-term industrial lifecycle support, and verified thermal performance in TO-220AB packages.
Supply support for BT151-650L 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The BT151-650L belongs to NXP's legacy power discrete family, designed specifically for robust, cost-effective AC power control in consumer and industrial equipment where reliability under thermal and electrical stress is essential.
FAQ
What is the maximum junction temperature specification for the BT151-650L?
The BT151-650L has a maximum junction temperature (Tj) of 125 °C, as defined in its Absolute Maximum Ratings table. This limit applies under all operating conditions, including surge events. Sustained operation near this limit requires effective heatsinking-verified by maintaining mounting base temperature (Tmb) ≤109 °C per Figure 1 and Figure 2 in the datasheet-to avoid thermal runaway or accelerated degradation. The BT151-650L must not be operated above 125 °C junction temperature, even transiently.
Can the BT151-650L be used in DC circuits, and what is its holding current range?
Yes, the BT151-650L can be used in DC circuits as a latching switch, provided the load current remains above the holding current (IH) after triggering. Per the Characteristics table, IH ranges from 7 to 20 mA at 25 °C and increases with temperature. In DC applications, the circuit must guarantee that current never drops below this threshold during normal operation-otherwise, the BT151-650L will self-commutate and turn off. For reliable DC hold, design for ≥30 mA minimum load current.
What is the gate trigger voltage requirement for the BT151-650L, and how does it vary with temperature?
The BT151-650L gate trigger voltage (VGT) is specified as 0.6–1.5 V at 25 °C and 100 mA anode current, with typical values decreasing at higher junction temperatures. Figure 12 shows normalized VGT dropping to ~0.4× nominal at 125 °C. This means actual VGT may fall as low as 0.25 V under hot conditions-critical for designing gate drive circuits that avoid false triggering from noise or leakage. Always reference Figure 12 for temperature-dependent VGT when validating gate driver margins.
Is the BT151-650L RoHS compliant, and what is its lead-free status?
Yes, the BT151-650L is RoHS compliant and lead-free. As confirmed by NXP's product change notifications and packaging documentation, the device uses lead-free terminations and complies with Directive 2011/65/EU. The TO-220AB (SOT78) package is manufactured with matte tin-plated leads, and no exemptions apply. Full compliance documentation-including substance declarations and test reports-is available through NXP's official product page and authorized distributor portals for the BT151-650L.
How does the BT151-650L's dV/dt rating change with gate-cathode resistance, and why does it matter?
The BT151-650L's critical dV/dt rating improves significantly with external gate-cathode resistance: it rises from ≥50 V/µs (gate open) to ≥200 V/µs with a 100 Ω resistor. This occurs because the resistor provides a low-impedance path that shunts displacement current away from the gate junction, preventing false triggering during rapid voltage transients-common in inductive loads or triac-switched circuits. Using RGK = 100 Ω is strongly recommended in noisy environments to ensure stable BT151-650L operation.
BT151-650L,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 650 V
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 5 mA
- Voltage - On State (Vtm) (Max):
- 1.75 V
- Current - On State (It (AV)) (Max):
- 7.5 A
- Current - On State (It (RMS)) (Max):
- 12 A
- Current - Hold (Ih) (Max):
- 20 mA
- Current - Off State (Max):
- 500 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 120A, 132A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
BT151-650L,127 FAQ
1.How can I place an order for BT151-650L,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BT151-650L,127 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 BT151-650L,127 reliable?
The price and inventory of BT151-650L,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BT151-650L,127 is usually 5 days.
3.What payment methods are accepted for BT151-650L,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BT151-650L,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BT151-650L,127?
BT151-650L,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BT151-650L,127 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 BT151-650L,127?
For technical support, including BT151-650L,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BT151-650L,127 requirements.
6.How does Aetrix verify that BT151-650L,127 is sourced from the original manufacturer or authorized distributors?
All BT151-650L,127 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 BT151-650L,127 meets industry standards.
7.What is the process for return or replacement of BT151-650L,127?
All BT151-650L,127 units undergo pre-shipment inspection (PSI). If there is an issue with BT151-650L,127, 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 BT151-650L,127 part is unused and in its original packaging.
Return procedure for BT151-650L,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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