Most industrial waterproof connectors are oversized, hard to assemble and costly. HRB 2.5mm pitch right angle wire to board waterproof connector (Model M2532/M2531R) is developed as a mini-size low-cost waterproof interconnect solution for automotive & outdoor electrical systems.
With IP67 waterproof and dustproof grade, solid rubber sealing and double locking mechanism, it guarantees stable sealing and anti-loosening performance under vibration, humidity and temperature fluctuation. Multiple pin counts from 2×9 to 2×20 satisfy diversified wiring demands of automotive cameras, vehicle batteries, electric two-wheelers and outdoor machinery.
| Part name | Part number | |
| Wire side | Receptacle housing | M2532 Series |
| Terminal | T2532 Series | |
| Applicable wire | AWG16 to AWG22 | |
| PCB side | Right Angle DIP Header | M2531R Series |
M2531R-2xN-X
① ② ③ ④
①: HRB item series number
②: R: Right angle(90°)
③: Number of pins per row: 9/13/16/17/20
④: HSG Color: B: black, G: gray
M2532-2xN-B
① ② ③
①: HRB item series number
②: Number of pins per row: 9/13/16/17/20
③: HSG Color: B: black
IP67 waterproof rating compliant with ISO 20653, fully dustproof & water-resistant
Integrated solid rubber seal ring, reliable wire & mating-side sealing
Double-fin socket contact, large front chamfer prevents grommet damage
Front cap assembly enables detection of incompletely inserted socket contacts
Full waterproof grommet on crimp area for compact structure
Waterproof seal ring at the mating area prevents direct contact with the insulator wall
Wide temperature range: -40℃ ~ +125℃, adapts vehicle harsh working conditions
Multiple pin options: 2×9, 2×13, 2×16, 2×17, 2×20 positions
Exploded view
This exploded view shows all key components of the waterproof connector, including pin contacts, pin insulator, front cap, seal ring, socket housing, grommet and rear cover. The multi-layer sealing structure delivers reliable IP67 waterproof performance, while the front cap design helps detect incomplete terminal insertion for improved assembly quality.
Electric vehicle built-in battery waterproof connection
Electric motorcycle internal wiring
Automotive built-in camera waterproof harness
Outdoor monitoring & outdoor waterproof electrical equipment
Small industrial machinery damp environment wiring
Q: What is the durability test requirement for M2532 series connector?
A: The mated connector shall complete 50 mating/unmating cycles at a maximum speed of 10 cycles per minute before environmental tests. After the test, the maximum contact resistance shall not exceed 10mΩ.
Q: What is the temperature rise requirement of M2532 connector?
A: With the connector fully mated, pass maximum rated current and measure the contact temperature rise. The maximum allowable temperature rise is 30°C.
Q: What is the vibration test requirement for M2532 series connector?
A: The mated connector is tested with 1A DC applied. Test frequency sweeps 50~1000Hz within 10 minutes, 3 hours for each X/Y/Z axis. Cable shall be fixed during test.
Requirements after test: No damage on appearance; contact resistance ≤10mΩ; discontinuity ≤1 microsecond max.
Q: What is the water resistance test requirement for M2532 series connector?
A: The connector is placed in a test chamber for cyclic water spray test.
- Shower ON: 20 min at room temperature
- Shower OFF: 40 min at 100°C
- Total 48 cycles.
Pass criteria: No damage on appearance; contact resistance ≤10mΩ.
Q: What is the humidity test requirement for M2532 series connector?
A: Fully mated connectors are exposed under 85±2°C, 90~95% relative humidity for 500 hours.
Acceptance criteria: No damage on appearance; contact resistance ≤10mΩ.
Q1：What is the sealing design of M2532 series connectors?
A1: M2532 adopts integrated sealing within the sealed cavity, which delivers stable and reliable waterproof performance.
Q: What pin counts and housing colors are available for M2532 series connectors?
A: M2532 series offers multiple dual-row pin options: 2×9, 2×13, 2×16, 2×17, 2×20. Two housing colors are available: black (suffix -B) and grey (suffix -G).
Q: What recommendations does HRB provide for harness manufacturers when assembling M2532 connectors?
A:
1. Wire gauge and terminal crimp specification must be well matched.
2. Verify the correct functional cavity positions before assembly to avoid misalignment.
3. Keep terminals and connectors away from lubricants, solvents and other harmful contaminants during assembly.
4. Scrape and segregate reworked terminal wires and connectors; reworked semi-finished products and connectors shall NOT be
reused.
Q: What recommendations for OEM manufacturers when using M2532 connectors?
A:
1. During full harness assembly, avoid touching or damaging gaskets and sealing rings.
2. Prevent collisions between connectors and other components throughout assembly.
Q2：What is the function of locating posts on the PCB header?
A2: The locating posts help reduce wobble and offset after PCB assembly, greatly improving the overall stability of the connector.
Q: How to mate M2532 cable-side connector with M2531R PCB header?
A: Align the keying features of M2532 and M2531R. Insert parallelly at a constant speed until you see the primary latch fully engaged and hear an audible click. This confirms the cable-to-board mating is completed.